| /* |
| * q_tbf.c TBF. |
| * |
| * 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" |
| |
| static void explain(void) |
| { |
| fprintf(stderr, "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n"); |
| fprintf(stderr, " [ peakrate KBPS ] [ latency TIME ] "); |
| fprintf(stderr, "[ overhead BYTES ] [ linklayer TYPE ]\n"); |
| } |
| |
| static void explain1(const char *arg, const char *val) |
| { |
| fprintf(stderr, "tbf: illegal value for \"%s\": \"%s\"\n", arg, val); |
| } |
| |
| |
| static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) |
| { |
| int ok=0; |
| struct tc_tbf_qopt opt; |
| __u32 rtab[256]; |
| __u32 ptab[256]; |
| unsigned buffer=0, mtu=0, mpu=0, latency=0; |
| int Rcell_log=-1, Pcell_log = -1; |
| unsigned short overhead=0; |
| unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ |
| struct rtattr *tail; |
| __u64 rate64 = 0, prate64 = 0; |
| |
| memset(&opt, 0, sizeof(opt)); |
| |
| while (argc > 0) { |
| if (matches(*argv, "limit") == 0) { |
| NEXT_ARG(); |
| if (opt.limit) { |
| fprintf(stderr, "tbf: duplicate \"limit\" specification\n"); |
| return -1; |
| } |
| if (latency) { |
| fprintf(stderr, "tbf: specifying both \"latency\" and \"limit\" is not allowed\n"); |
| return -1; |
| } |
| if (get_size(&opt.limit, *argv)) { |
| explain1("limit", *argv); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "latency") == 0) { |
| NEXT_ARG(); |
| if (latency) { |
| fprintf(stderr, "tbf: duplicate \"latency\" specification\n"); |
| return -1; |
| } |
| if (opt.limit) { |
| fprintf(stderr, "tbf: specifying both \"limit\" and \"/latency\" is not allowed\n"); |
| return -1; |
| } |
| if (get_time(&latency, *argv)) { |
| explain1("latency", *argv); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "burst") == 0 || |
| strcmp(*argv, "buffer") == 0 || |
| strcmp(*argv, "maxburst") == 0) { |
| const char *parm_name = *argv; |
| NEXT_ARG(); |
| if (buffer) { |
| fprintf(stderr, "tbf: duplicate \"buffer/burst/maxburst\" specification\n"); |
| return -1; |
| } |
| if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { |
| explain1(parm_name, *argv); |
| return -1; |
| } |
| ok++; |
| } else if (strcmp(*argv, "mtu") == 0 || |
| strcmp(*argv, "minburst") == 0) { |
| const char *parm_name = *argv; |
| NEXT_ARG(); |
| if (mtu) { |
| fprintf(stderr, "tbf: duplicate \"mtu/minburst\" specification\n"); |
| return -1; |
| } |
| if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) { |
| explain1(parm_name, *argv); |
| return -1; |
| } |
| ok++; |
| } else if (strcmp(*argv, "mpu") == 0) { |
| NEXT_ARG(); |
| if (mpu) { |
| fprintf(stderr, "tbf: duplicate \"mpu\" specification\n"); |
| return -1; |
| } |
| if (get_size(&mpu, *argv)) { |
| explain1("mpu", *argv); |
| return -1; |
| } |
| ok++; |
| } else if (strcmp(*argv, "rate") == 0) { |
| NEXT_ARG(); |
| if (rate64) { |
| fprintf(stderr, "tbf: duplicate \"rate\" specification\n"); |
| return -1; |
| } |
| if (get_rate64(&rate64, *argv)) { |
| explain1("rate", *argv); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "peakrate") == 0) { |
| NEXT_ARG(); |
| if (prate64) { |
| fprintf(stderr, "tbf: duplicate \"peakrate\" specification\n"); |
| return -1; |
| } |
| if (get_rate64(&prate64, *argv)) { |
| explain1("peakrate", *argv); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "overhead") == 0) { |
| NEXT_ARG(); |
| if (overhead) { |
| fprintf(stderr, "tbf: duplicate \"overhead\" specification\n"); |
| return -1; |
| } |
| if (get_u16(&overhead, *argv, 10)) { |
| explain1("overhead", *argv); return -1; |
| } |
| } else if (matches(*argv, "linklayer") == 0) { |
| NEXT_ARG(); |
| if (get_linklayer(&linklayer, *argv)) { |
| explain1("linklayer", *argv); return -1; |
| } |
| } else if (strcmp(*argv, "help") == 0) { |
| explain(); |
| return -1; |
| } else { |
| fprintf(stderr, "tbf: unknown parameter \"%s\"\n", *argv); |
| explain(); |
| return -1; |
| } |
| argc--; argv++; |
| } |
| |
| int verdict = 0; |
| |
| /* Be nice to the user: try to emit all error messages in |
| * one go rather than reveal one more problem when a |
| * previous one has been fixed. |
| */ |
| if (rate64 == 0) { |
| fprintf(stderr, "tbf: the \"rate\" parameter is mandatory.\n"); |
| verdict = -1; |
| } |
| if (!buffer) { |
| fprintf(stderr, "tbf: the \"burst\" parameter is mandatory.\n"); |
| verdict = -1; |
| } |
| if (prate64) { |
| if (!mtu) { |
| fprintf(stderr, "tbf: when \"peakrate\" is specified, \"mtu\" must also be specified.\n"); |
| verdict = -1; |
| } |
| } |
| |
| if (opt.limit == 0 && latency == 0) { |
| fprintf(stderr, "tbf: either \"limit\" or \"latency\" is required.\n"); |
| verdict = -1; |
| } |
| |
| if (verdict != 0) { |
| explain(); |
| return verdict; |
| } |
| |
| opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64; |
| opt.peakrate.rate = (prate64 >= (1ULL << 32)) ? ~0U : prate64; |
| |
| if (opt.limit == 0) { |
| double lim = rate64*(double)latency/TIME_UNITS_PER_SEC + buffer; |
| if (prate64) { |
| double lim2 = prate64*(double)latency/TIME_UNITS_PER_SEC + mtu; |
| if (lim2 < lim) |
| lim = lim2; |
| } |
| opt.limit = lim; |
| } |
| |
| opt.rate.mpu = mpu; |
| opt.rate.overhead = overhead; |
| if (tc_calc_rtable(&opt.rate, rtab, Rcell_log, mtu, linklayer) < 0) { |
| fprintf(stderr, "tbf: failed to calculate rate table.\n"); |
| return -1; |
| } |
| opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer); |
| |
| if (opt.peakrate.rate) { |
| opt.peakrate.mpu = mpu; |
| opt.peakrate.overhead = overhead; |
| if (tc_calc_rtable(&opt.peakrate, ptab, Pcell_log, mtu, linklayer) < 0) { |
| fprintf(stderr, "tbf: failed to calculate peak rate table.\n"); |
| return -1; |
| } |
| opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu); |
| } |
| |
| tail = NLMSG_TAIL(n); |
| addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
| addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt)); |
| addattr_l(n, 2124, TCA_TBF_BURST, &buffer, sizeof(buffer)); |
| if (rate64 >= (1ULL << 32)) |
| addattr_l(n, 2124, TCA_TBF_RATE64, &rate64, sizeof(rate64)); |
| addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024); |
| if (opt.peakrate.rate) { |
| if (prate64 >= (1ULL << 32)) |
| addattr_l(n, 3124, TCA_TBF_PRATE64, &prate64, sizeof(prate64)); |
| addattr_l(n, 3224, TCA_TBF_PBURST, &mtu, sizeof(mtu)); |
| addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024); |
| } |
| tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
| return 0; |
| } |
| |
| static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) |
| { |
| struct rtattr *tb[TCA_TBF_MAX+1]; |
| struct tc_tbf_qopt *qopt; |
| unsigned int linklayer; |
| double buffer, mtu; |
| double latency; |
| __u64 rate64 = 0, prate64 = 0; |
| SPRINT_BUF(b1); |
| SPRINT_BUF(b2); |
| SPRINT_BUF(b3); |
| |
| if (opt == NULL) |
| return 0; |
| |
| parse_rtattr_nested(tb, TCA_TBF_MAX, opt); |
| |
| if (tb[TCA_TBF_PARMS] == NULL) |
| return -1; |
| |
| qopt = RTA_DATA(tb[TCA_TBF_PARMS]); |
| if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt)) |
| return -1; |
| rate64 = qopt->rate.rate; |
| if (tb[TCA_TBF_RATE64] && |
| RTA_PAYLOAD(tb[TCA_TBF_RATE64]) >= sizeof(rate64)) |
| rate64 = rta_getattr_u64(tb[TCA_TBF_RATE64]); |
| fprintf(f, "rate %s ", sprint_rate(rate64, b1)); |
| buffer = tc_calc_xmitsize(rate64, qopt->buffer); |
| if (show_details) { |
| fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1), |
| 1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2)); |
| } else { |
| fprintf(f, "burst %s ", sprint_size(buffer, b1)); |
| } |
| if (show_raw) |
| fprintf(f, "[%08x] ", qopt->buffer); |
| prate64 = qopt->peakrate.rate; |
| if (tb[TCA_TBF_PRATE64] && |
| RTA_PAYLOAD(tb[TCA_TBF_PRATE64]) >= sizeof(prate64)) |
| prate64 = rta_getattr_u64(tb[TCA_TBF_PRATE64]); |
| if (prate64) { |
| fprintf(f, "peakrate %s ", sprint_rate(prate64, b1)); |
| if (qopt->mtu || qopt->peakrate.mpu) { |
| mtu = tc_calc_xmitsize(prate64, qopt->mtu); |
| if (show_details) { |
| fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1), |
| 1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2)); |
| } else { |
| fprintf(f, "minburst %s ", sprint_size(mtu, b1)); |
| } |
| if (show_raw) |
| fprintf(f, "[%08x] ", qopt->mtu); |
| } |
| } |
| |
| if (show_raw) |
| fprintf(f, "limit %s ", sprint_size(qopt->limit, b1)); |
| |
| latency = TIME_UNITS_PER_SEC*(qopt->limit/(double)rate64) - tc_core_tick2time(qopt->buffer); |
| if (prate64) { |
| double lat2 = TIME_UNITS_PER_SEC*(qopt->limit/(double)prate64) - tc_core_tick2time(qopt->mtu); |
| if (lat2 > latency) |
| latency = lat2; |
| } |
| fprintf(f, "lat %s ", sprint_time(latency, b1)); |
| |
| if (qopt->rate.overhead) { |
| fprintf(f, "overhead %d", qopt->rate.overhead); |
| } |
| linklayer = (qopt->rate.linklayer & TC_LINKLAYER_MASK); |
| if (linklayer > TC_LINKLAYER_ETHERNET || show_details) |
| fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b3)); |
| |
| return 0; |
| } |
| |
| struct qdisc_util tbf_qdisc_util = { |
| .id = "tbf", |
| .parse_qopt = tbf_parse_opt, |
| .print_qopt = tbf_print_opt, |
| }; |
| |