| /* |
| * 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 <syslog.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"); |
| fprintf(stderr, " [ minburst PKTS ] [ bounded ] [ isolated ]\n"); |
| fprintf(stderr, " [ allot BYTES ] [ mpu BYTES ] [ weight RATE ]\n"); |
| fprintf(stderr, " [ prio NUMBER ] [ cell BYTES ] [ ewma LOG ]\n"); |
| fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n"); |
| fprintf(stderr, " [ split CLASSID ] [ defmap MASK/CHANGE ]\n"); |
| fprintf(stderr, " [ overhead BYTES ] [ linklayer TYPE ]\n"); |
| } |
| |
| static void explain(void) |
| { |
| fprintf(stderr, "Usage: ... cbq bandwidth BPS avpkt BYTES [ mpu BYTES ]\n"); |
| fprintf(stderr, " [ cell BYTES ] [ ewma LOG ]\n"); |
| } |
| |
| static void explain1(char *arg) |
| { |
| fprintf(stderr, "Illegal \"%s\"\n", arg); |
| } |
| |
| #define usage() return(-1) |
| |
| static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) |
| { |
| 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; |
| |
| memset(&lss, 0, sizeof(lss)); |
| memset(&r, 0, sizeof(r)); |
| |
| while (argc > 0) { |
| if (matches(*argv, "bandwidth") == 0 || |
| matches(*argv, "rate") == 0) { |
| NEXT_ARG(); |
| 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 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 = NLMSG_TAIL(n); |
| addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
| 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"); |
| } |
| tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
| return 0; |
| } |
| |
| static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) |
| { |
| 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; |
| struct tc_cbq_ovl ovl; |
| __u32 rtab[256]; |
| unsigned mpu=0; |
| int cell_log=-1; |
| int ewma_log=-1; |
| unsigned bndw = 0; |
| unsigned minburst=0, maxburst=0; |
| unsigned short overhead=0; |
| unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ |
| struct rtattr *tail; |
| |
| memset(&r, 0, sizeof(r)); |
| memset(&lss, 0, sizeof(lss)); |
| memset(&wrr, 0, sizeof(wrr)); |
| memset(&fopt, 0, sizeof(fopt)); |
| memset(&ovl, 0, sizeof(ovl)); |
| |
| while (argc > 0) { |
| if (matches(*argv, "rate") == 0) { |
| NEXT_ARG(); |
| if (get_rate(&r.rate, *argv)) { |
| explain1("rate"); |
| return -1; |
| } |
| } else if (matches(*argv, "bandwidth") == 0) { |
| NEXT_ARG(); |
| 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 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 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"); |
| usage(); |
| } |
| 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 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 = NLMSG_TAIL(n); |
| addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
| 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"); |
| } |
| } |
| tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) 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; |
| SPRINT_BUF(b1); |
| |
| 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) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]), |
| (unsigned) sizeof(*ovl)); |
| else |
| ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]); |
| } |
| |
| if (r) { |
| char buf[64]; |
| print_rate(buf, sizeof(buf), r->rate); |
| fprintf(f, "rate %s ", buf); |
| 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) { |
| char buf[64]; |
| fprintf(f, "/%u ", wrr->cpriority); |
| if (wrr->weight != 1) { |
| print_rate(buf, sizeof(buf), wrr->weight); |
| fprintf(f, "weight %s ", buf); |
| } |
| 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, |
| }; |
| |
