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-rw-r--r--tc/q_cbq.c594
1 files changed, 594 insertions, 0 deletions
diff --git a/tc/q_cbq.c b/tc/q_cbq.c
new file mode 100644
index 0000000..4619a37
--- /dev/null
+++ b/tc/q_cbq.c
@@ -0,0 +1,594 @@
+/*
+ * q_cbq.c CBQ.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#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"
+#include "tc_cbq.h"
+
+static void explain_class(void)
+{
+ fprintf(stderr,
+ "Usage: ... cbq bandwidth BPS rate BPS maxburst PKTS [ avpkt BYTES ]\n"
+ " [ minburst PKTS ] [ bounded ] [ isolated ]\n"
+ " [ allot BYTES ] [ mpu BYTES ] [ weight RATE ]\n"
+ " [ prio NUMBER ] [ cell BYTES ] [ ewma LOG ]\n"
+ " [ estimator INTERVAL TIME_CONSTANT ]\n"
+ " [ split CLASSID ] [ defmap MASK/CHANGE ]\n"
+ " [ overhead BYTES ] [ linklayer TYPE ]\n");
+}
+
+static void explain(void)
+{
+ fprintf(stderr,
+ "Usage: ... cbq bandwidth BPS avpkt BYTES [ mpu BYTES ]\n"
+ " [ cell BYTES ] [ ewma LOG ]\n");
+}
+
+static void explain1(char *arg)
+{
+ fprintf(stderr, "Illegal \"%s\"\n", arg);
+}
+
+
+static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
+{
+ struct tc_ratespec r = {};
+ struct tc_cbq_lssopt lss = {};
+ __u32 rtab[256];
+ unsigned mpu = 0, avpkt = 0, allot = 0;
+ unsigned short overhead = 0;
+ unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
+ int cell_log = -1;
+ int ewma_log = -1;
+ struct rtattr *tail;
+
+ while (argc > 0) {
+ if (matches(*argv, "bandwidth") == 0 ||
+ matches(*argv, "rate") == 0) {
+ NEXT_ARG();
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate(&r.rate, *argv, dev)) {
+ explain1("bandwidth");
+ return -1;
+ }
+ } else if (get_rate(&r.rate, *argv)) {
+ explain1("bandwidth");
+ return -1;
+ }
+ } else if (matches(*argv, "ewma") == 0) {
+ NEXT_ARG();
+ if (get_integer(&ewma_log, *argv, 0)) {
+ explain1("ewma");
+ return -1;
+ }
+ if (ewma_log > 31) {
+ fprintf(stderr, "ewma_log must be < 32\n");
+ return -1;
+ }
+ } else if (matches(*argv, "cell") == 0) {
+ unsigned int cell;
+ int i;
+
+ NEXT_ARG();
+ if (get_size(&cell, *argv)) {
+ explain1("cell");
+ return -1;
+ }
+ for (i = 0; i < 32; i++)
+ if ((1<<i) == cell)
+ break;
+ if (i >= 32) {
+ fprintf(stderr, "cell must be 2^n\n");
+ return -1;
+ }
+ cell_log = i;
+ } else if (matches(*argv, "avpkt") == 0) {
+ NEXT_ARG();
+ if (get_size(&avpkt, *argv)) {
+ explain1("avpkt");
+ return -1;
+ }
+ } else if (matches(*argv, "mpu") == 0) {
+ NEXT_ARG();
+ if (get_size(&mpu, *argv)) {
+ explain1("mpu");
+ return -1;
+ }
+ } else if (matches(*argv, "allot") == 0) {
+ NEXT_ARG();
+ /* Accept and ignore "allot" for backward compatibility */
+ if (get_size(&allot, *argv)) {
+ explain1("allot");
+ return -1;
+ }
+ } else if (matches(*argv, "overhead") == 0) {
+ NEXT_ARG();
+ if (get_u16(&overhead, *argv, 10)) {
+ explain1("overhead"); return -1;
+ }
+ } else if (matches(*argv, "linklayer") == 0) {
+ NEXT_ARG();
+ if (get_linklayer(&linklayer, *argv)) {
+ explain1("linklayer"); return -1;
+ }
+ } else if (matches(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ /* OK. All options are parsed. */
+
+ if (r.rate == 0) {
+ fprintf(stderr, "CBQ: bandwidth is required parameter.\n");
+ return -1;
+ }
+ if (avpkt == 0) {
+ fprintf(stderr, "CBQ: \"avpkt\" is required.\n");
+ return -1;
+ }
+ if (allot < (avpkt*3)/2)
+ allot = (avpkt*3)/2;
+
+ r.mpu = mpu;
+ r.overhead = overhead;
+ if (tc_calc_rtable(&r, rtab, cell_log, allot, linklayer) < 0) {
+ fprintf(stderr, "CBQ: failed to calculate rate table.\n");
+ return -1;
+ }
+
+ if (ewma_log < 0)
+ ewma_log = TC_CBQ_DEF_EWMA;
+ lss.ewma_log = ewma_log;
+ lss.maxidle = tc_calc_xmittime(r.rate, avpkt);
+ lss.change = TCF_CBQ_LSS_MAXIDLE|TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
+ lss.avpkt = avpkt;
+
+ tail = addattr_nest(n, 1024, TCA_OPTIONS);
+ addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
+ addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
+ addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
+ if (show_raw) {
+ int i;
+
+ for (i = 0; i < 256; i++)
+ printf("%u ", rtab[i]);
+ printf("\n");
+ }
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
+{
+ int wrr_ok = 0, fopt_ok = 0;
+ struct tc_ratespec r = {};
+ struct tc_cbq_lssopt lss = {};
+ struct tc_cbq_wrropt wrr = {};
+ struct tc_cbq_fopt fopt = {};
+ __u32 rtab[256];
+ unsigned mpu = 0;
+ int cell_log = -1;
+ int ewma_log = -1;
+ unsigned int bndw = 0;
+ unsigned minburst = 0, maxburst = 0;
+ unsigned short overhead = 0;
+ unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
+ struct rtattr *tail;
+
+ while (argc > 0) {
+ if (matches(*argv, "rate") == 0) {
+ NEXT_ARG();
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate(&r.rate, *argv, dev)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (get_rate(&r.rate, *argv)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (matches(*argv, "bandwidth") == 0) {
+ NEXT_ARG();
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate(&bndw, *argv, dev)) {
+ explain1("bandwidth");
+ return -1;
+ }
+ } else if (get_rate(&bndw, *argv)) {
+ explain1("bandwidth");
+ return -1;
+ }
+ } else if (matches(*argv, "minidle") == 0) {
+ NEXT_ARG();
+ if (get_u32(&lss.minidle, *argv, 0)) {
+ explain1("minidle");
+ return -1;
+ }
+ lss.change |= TCF_CBQ_LSS_MINIDLE;
+ } else if (matches(*argv, "minburst") == 0) {
+ NEXT_ARG();
+ if (get_u32(&minburst, *argv, 0)) {
+ explain1("minburst");
+ return -1;
+ }
+ lss.change |= TCF_CBQ_LSS_OFFTIME;
+ } else if (matches(*argv, "maxburst") == 0) {
+ NEXT_ARG();
+ if (get_u32(&maxburst, *argv, 0)) {
+ explain1("maxburst");
+ return -1;
+ }
+ lss.change |= TCF_CBQ_LSS_MAXIDLE;
+ } else if (matches(*argv, "bounded") == 0) {
+ lss.flags |= TCF_CBQ_LSS_BOUNDED;
+ lss.change |= TCF_CBQ_LSS_FLAGS;
+ } else if (matches(*argv, "borrow") == 0) {
+ lss.flags &= ~TCF_CBQ_LSS_BOUNDED;
+ lss.change |= TCF_CBQ_LSS_FLAGS;
+ } else if (matches(*argv, "isolated") == 0) {
+ lss.flags |= TCF_CBQ_LSS_ISOLATED;
+ lss.change |= TCF_CBQ_LSS_FLAGS;
+ } else if (matches(*argv, "sharing") == 0) {
+ lss.flags &= ~TCF_CBQ_LSS_ISOLATED;
+ lss.change |= TCF_CBQ_LSS_FLAGS;
+ } else if (matches(*argv, "ewma") == 0) {
+ NEXT_ARG();
+ if (get_integer(&ewma_log, *argv, 0)) {
+ explain1("ewma");
+ return -1;
+ }
+ if (ewma_log > 31) {
+ fprintf(stderr, "ewma_log must be < 32\n");
+ return -1;
+ }
+ lss.change |= TCF_CBQ_LSS_EWMA;
+ } else if (matches(*argv, "cell") == 0) {
+ unsigned int cell;
+ int i;
+
+ NEXT_ARG();
+ if (get_size(&cell, *argv)) {
+ explain1("cell");
+ return -1;
+ }
+ for (i = 0; i < 32; i++)
+ if ((1<<i) == cell)
+ break;
+ if (i >= 32) {
+ fprintf(stderr, "cell must be 2^n\n");
+ return -1;
+ }
+ cell_log = i;
+ } else if (matches(*argv, "prio") == 0) {
+ unsigned int prio;
+
+ NEXT_ARG();
+ if (get_u32(&prio, *argv, 0)) {
+ explain1("prio");
+ return -1;
+ }
+ if (prio > TC_CBQ_MAXPRIO) {
+ fprintf(stderr, "\"prio\" must be number in the range 1...%d\n", TC_CBQ_MAXPRIO);
+ return -1;
+ }
+ wrr.priority = prio;
+ wrr_ok++;
+ } else if (matches(*argv, "allot") == 0) {
+ NEXT_ARG();
+ if (get_size(&wrr.allot, *argv)) {
+ explain1("allot");
+ return -1;
+ }
+ } else if (matches(*argv, "avpkt") == 0) {
+ NEXT_ARG();
+ if (get_size(&lss.avpkt, *argv)) {
+ explain1("avpkt");
+ return -1;
+ }
+ lss.change |= TCF_CBQ_LSS_AVPKT;
+ } else if (matches(*argv, "mpu") == 0) {
+ NEXT_ARG();
+ if (get_size(&mpu, *argv)) {
+ explain1("mpu");
+ return -1;
+ }
+ } else if (matches(*argv, "weight") == 0) {
+ NEXT_ARG();
+ if (get_size(&wrr.weight, *argv)) {
+ explain1("weight");
+ return -1;
+ }
+ wrr_ok++;
+ } else if (matches(*argv, "split") == 0) {
+ NEXT_ARG();
+ if (get_tc_classid(&fopt.split, *argv)) {
+ fprintf(stderr, "Invalid split node ID.\n");
+ return -1;
+ }
+ fopt_ok++;
+ } else if (matches(*argv, "defmap") == 0) {
+ int err;
+
+ NEXT_ARG();
+ err = sscanf(*argv, "%08x/%08x", &fopt.defmap, &fopt.defchange);
+ if (err < 1) {
+ fprintf(stderr, "Invalid defmap, should be MASK32[/MASK]\n");
+ return -1;
+ }
+ if (err == 1)
+ fopt.defchange = ~0;
+ fopt_ok++;
+ } else if (matches(*argv, "overhead") == 0) {
+ NEXT_ARG();
+ if (get_u16(&overhead, *argv, 10)) {
+ explain1("overhead"); return -1;
+ }
+ } else if (matches(*argv, "linklayer") == 0) {
+ NEXT_ARG();
+ if (get_linklayer(&linklayer, *argv)) {
+ explain1("linklayer"); return -1;
+ }
+ } else if (matches(*argv, "help") == 0) {
+ explain_class();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain_class();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ /* OK. All options are parsed. */
+
+ /* 1. Prepare link sharing scheduler parameters */
+ if (r.rate) {
+ unsigned int pktsize = wrr.allot;
+
+ if (wrr.allot < (lss.avpkt*3)/2)
+ wrr.allot = (lss.avpkt*3)/2;
+ r.mpu = mpu;
+ r.overhead = overhead;
+ if (tc_calc_rtable(&r, rtab, cell_log, pktsize, linklayer) < 0) {
+ fprintf(stderr, "CBQ: failed to calculate rate table.\n");
+ return -1;
+ }
+ }
+ if (ewma_log < 0)
+ ewma_log = TC_CBQ_DEF_EWMA;
+ lss.ewma_log = ewma_log;
+ if (lss.change&(TCF_CBQ_LSS_OFFTIME|TCF_CBQ_LSS_MAXIDLE)) {
+ if (lss.avpkt == 0) {
+ fprintf(stderr, "CBQ: avpkt is required for max/minburst.\n");
+ return -1;
+ }
+ if (bndw == 0 || r.rate == 0) {
+ fprintf(stderr, "CBQ: bandwidth&rate are required for max/minburst.\n");
+ return -1;
+ }
+ }
+ if (wrr.priority == 0 && (n->nlmsg_flags&NLM_F_EXCL)) {
+ wrr_ok = 1;
+ wrr.priority = TC_CBQ_MAXPRIO;
+ if (wrr.allot == 0)
+ wrr.allot = (lss.avpkt*3)/2;
+ }
+ if (wrr_ok) {
+ if (wrr.weight == 0)
+ wrr.weight = (wrr.priority == TC_CBQ_MAXPRIO) ? 1 : r.rate;
+ if (wrr.allot == 0) {
+ fprintf(stderr, "CBQ: \"allot\" is required to set WRR parameters.\n");
+ return -1;
+ }
+ }
+ if (lss.change&TCF_CBQ_LSS_MAXIDLE) {
+ lss.maxidle = tc_cbq_calc_maxidle(bndw, r.rate, lss.avpkt, ewma_log, maxburst);
+ lss.change |= TCF_CBQ_LSS_MAXIDLE;
+ lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
+ }
+ if (lss.change&TCF_CBQ_LSS_OFFTIME) {
+ lss.offtime = tc_cbq_calc_offtime(bndw, r.rate, lss.avpkt, ewma_log, minburst);
+ lss.change |= TCF_CBQ_LSS_OFFTIME;
+ lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
+ }
+ if (lss.change&TCF_CBQ_LSS_MINIDLE) {
+ lss.minidle <<= lss.ewma_log;
+ lss.change |= TCF_CBQ_LSS_EWMA;
+ }
+
+ tail = addattr_nest(n, 1024, TCA_OPTIONS);
+ if (lss.change) {
+ lss.change |= TCF_CBQ_LSS_FLAGS;
+ addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
+ }
+ if (wrr_ok)
+ addattr_l(n, 1024, TCA_CBQ_WRROPT, &wrr, sizeof(wrr));
+ if (fopt_ok)
+ addattr_l(n, 1024, TCA_CBQ_FOPT, &fopt, sizeof(fopt));
+ if (r.rate) {
+ addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
+ addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
+ if (show_raw) {
+ int i;
+
+ for (i = 0; i < 256; i++)
+ printf("%u ", rtab[i]);
+ printf("\n");
+ }
+ }
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+
+static int cbq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ struct rtattr *tb[TCA_CBQ_MAX+1];
+ struct tc_ratespec *r = NULL;
+ struct tc_cbq_lssopt *lss = NULL;
+ struct tc_cbq_wrropt *wrr = NULL;
+ struct tc_cbq_fopt *fopt = NULL;
+ struct tc_cbq_ovl *ovl = NULL;
+ unsigned int linklayer;
+
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
+
+ if (tb[TCA_CBQ_RATE]) {
+ if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
+ fprintf(stderr, "CBQ: too short rate opt\n");
+ else
+ r = RTA_DATA(tb[TCA_CBQ_RATE]);
+ }
+ if (tb[TCA_CBQ_LSSOPT]) {
+ if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
+ fprintf(stderr, "CBQ: too short lss opt\n");
+ else
+ lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
+ }
+ if (tb[TCA_CBQ_WRROPT]) {
+ if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
+ fprintf(stderr, "CBQ: too short wrr opt\n");
+ else
+ wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
+ }
+ if (tb[TCA_CBQ_FOPT]) {
+ if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
+ fprintf(stderr, "CBQ: too short fopt\n");
+ else
+ fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
+ }
+ if (tb[TCA_CBQ_OVL_STRATEGY]) {
+ if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
+ fprintf(stderr, "CBQ: too short overlimit strategy %u/%u\n",
+ (unsigned int) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
+ (unsigned int) sizeof(*ovl));
+ else
+ ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
+ }
+
+ if (r) {
+ tc_print_rate(PRINT_FP, NULL, "rate %s ", r->rate);
+ linklayer = (r->linklayer & TC_LINKLAYER_MASK);
+ if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
+ fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2));
+ if (show_details) {
+ fprintf(f, "cell %ub ", 1<<r->cell_log);
+ if (r->mpu)
+ fprintf(f, "mpu %ub ", r->mpu);
+ if (r->overhead)
+ fprintf(f, "overhead %ub ", r->overhead);
+ }
+ }
+ if (lss && lss->flags) {
+ int comma = 0;
+
+ fprintf(f, "(");
+ if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
+ fprintf(f, "bounded");
+ comma = 1;
+ }
+ if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
+ if (comma)
+ fprintf(f, ",");
+ fprintf(f, "isolated");
+ }
+ fprintf(f, ") ");
+ }
+ if (wrr) {
+ if (wrr->priority != TC_CBQ_MAXPRIO)
+ fprintf(f, "prio %u", wrr->priority);
+ else
+ fprintf(f, "prio no-transmit");
+ if (show_details) {
+ fprintf(f, "/%u ", wrr->cpriority);
+ if (wrr->weight != 1)
+ tc_print_rate(PRINT_FP, NULL, "weight %s ",
+ wrr->weight);
+ if (wrr->allot)
+ fprintf(f, "allot %ub ", wrr->allot);
+ }
+ }
+ if (lss && show_details) {
+ fprintf(f, "\nlevel %u ewma %u avpkt %ub ", lss->level, lss->ewma_log, lss->avpkt);
+ if (lss->maxidle) {
+ fprintf(f, "maxidle %s ", sprint_ticks(lss->maxidle>>lss->ewma_log, b1));
+ if (show_raw)
+ fprintf(f, "[%08x] ", lss->maxidle);
+ }
+ if (lss->minidle != 0x7fffffff) {
+ fprintf(f, "minidle %s ", sprint_ticks(lss->minidle>>lss->ewma_log, b1));
+ if (show_raw)
+ fprintf(f, "[%08x] ", lss->minidle);
+ }
+ if (lss->offtime) {
+ fprintf(f, "offtime %s ", sprint_ticks(lss->offtime, b1));
+ if (show_raw)
+ fprintf(f, "[%08x] ", lss->offtime);
+ }
+ }
+ if (fopt && show_details) {
+ char buf[64];
+
+ print_tc_classid(buf, sizeof(buf), fopt->split);
+ fprintf(f, "\nsplit %s ", buf);
+ if (fopt->defmap) {
+ fprintf(f, "defmap %08x", fopt->defmap);
+ }
+ }
+ return 0;
+}
+
+static int cbq_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
+{
+ struct tc_cbq_xstats *st;
+
+ if (xstats == NULL)
+ return 0;
+
+ if (RTA_PAYLOAD(xstats) < sizeof(*st))
+ return -1;
+
+ st = RTA_DATA(xstats);
+ fprintf(f, " borrowed %u overactions %u avgidle %g undertime %g", st->borrows,
+ st->overactions, (double)st->avgidle, (double)st->undertime);
+ return 0;
+}
+
+struct qdisc_util cbq_qdisc_util = {
+ .id = "cbq",
+ .parse_qopt = cbq_parse_opt,
+ .print_qopt = cbq_print_opt,
+ .print_xstats = cbq_print_xstats,
+ .parse_copt = cbq_parse_class_opt,
+ .print_copt = cbq_print_opt,
+};
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