4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
17 #include <sys/socket.h>
18 #include <netinet/in.h>
19 #include <arpa/inet.h>
25 static void explain(void)
28 "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n"
29 " [ peakrate KBPS ] [ latency TIME ] "
30 "[ overhead BYTES ] [ linklayer TYPE ]\n");
33 static void explain1(const char *arg, const char *val)
35 fprintf(stderr, "tbf: illegal value for \"%s\": \"%s\"\n", arg, val);
39 static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv,
40 struct nlmsghdr *n, const char *dev)
43 struct tc_tbf_qopt opt = {};
46 unsigned buffer = 0, mtu = 0, mpu = 0, latency = 0;
47 int Rcell_log = -1, Pcell_log = -1;
48 unsigned short overhead = 0;
49 unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
51 __u64 rate64 = 0, prate64 = 0;
54 if (matches(*argv, "limit") == 0) {
57 fprintf(stderr, "tbf: duplicate \"limit\" specification\n");
61 fprintf(stderr, "tbf: specifying both \"latency\" and \"limit\" is not allowed\n");
64 if (get_size(&opt.limit, *argv)) {
65 explain1("limit", *argv);
69 } else if (matches(*argv, "latency") == 0) {
72 fprintf(stderr, "tbf: duplicate \"latency\" specification\n");
76 fprintf(stderr, "tbf: specifying both \"limit\" and \"/latency\" is not allowed\n");
79 if (get_time(&latency, *argv)) {
80 explain1("latency", *argv);
84 } else if (matches(*argv, "burst") == 0 ||
85 strcmp(*argv, "buffer") == 0 ||
86 strcmp(*argv, "maxburst") == 0) {
87 const char *parm_name = *argv;
91 fprintf(stderr, "tbf: duplicate \"buffer/burst/maxburst\" specification\n");
94 if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
95 explain1(parm_name, *argv);
99 } else if (strcmp(*argv, "mtu") == 0 ||
100 strcmp(*argv, "minburst") == 0) {
101 const char *parm_name = *argv;
105 fprintf(stderr, "tbf: duplicate \"mtu/minburst\" specification\n");
108 if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
109 explain1(parm_name, *argv);
113 } else if (strcmp(*argv, "mpu") == 0) {
116 fprintf(stderr, "tbf: duplicate \"mpu\" specification\n");
119 if (get_size(&mpu, *argv)) {
120 explain1("mpu", *argv);
124 } else if (strcmp(*argv, "rate") == 0) {
127 fprintf(stderr, "tbf: duplicate \"rate\" specification\n");
130 if (strchr(*argv, '%')) {
131 if (get_percent_rate64(&rate64, *argv, dev)) {
132 explain1("rate", *argv);
135 } else if (get_rate64(&rate64, *argv)) {
136 explain1("rate", *argv);
140 } else if (matches(*argv, "peakrate") == 0) {
143 fprintf(stderr, "tbf: duplicate \"peakrate\" specification\n");
146 if (strchr(*argv, '%')) {
147 if (get_percent_rate64(&prate64, *argv, dev)) {
148 explain1("peakrate", *argv);
151 } else if (get_rate64(&prate64, *argv)) {
152 explain1("peakrate", *argv);
156 } else if (matches(*argv, "overhead") == 0) {
159 fprintf(stderr, "tbf: duplicate \"overhead\" specification\n");
162 if (get_u16(&overhead, *argv, 10)) {
163 explain1("overhead", *argv); return -1;
165 } else if (matches(*argv, "linklayer") == 0) {
167 if (get_linklayer(&linklayer, *argv)) {
168 explain1("linklayer", *argv); return -1;
170 } else if (strcmp(*argv, "help") == 0) {
174 fprintf(stderr, "tbf: unknown parameter \"%s\"\n", *argv);
183 /* Be nice to the user: try to emit all error messages in
184 * one go rather than reveal one more problem when a
185 * previous one has been fixed.
188 fprintf(stderr, "tbf: the \"rate\" parameter is mandatory.\n");
192 fprintf(stderr, "tbf: the \"burst\" parameter is mandatory.\n");
197 fprintf(stderr, "tbf: when \"peakrate\" is specified, \"mtu\" must also be specified.\n");
202 if (opt.limit == 0 && latency == 0) {
203 fprintf(stderr, "tbf: either \"limit\" or \"latency\" is required.\n");
212 opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64;
213 opt.peakrate.rate = (prate64 >= (1ULL << 32)) ? ~0U : prate64;
215 if (opt.limit == 0) {
216 double lim = rate64*(double)latency/TIME_UNITS_PER_SEC + buffer;
219 double lim2 = prate64*(double)latency/TIME_UNITS_PER_SEC + mtu;
228 opt.rate.overhead = overhead;
229 if (tc_calc_rtable(&opt.rate, rtab, Rcell_log, mtu, linklayer) < 0) {
230 fprintf(stderr, "tbf: failed to calculate rate table.\n");
233 opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
235 if (opt.peakrate.rate) {
236 opt.peakrate.mpu = mpu;
237 opt.peakrate.overhead = overhead;
238 if (tc_calc_rtable(&opt.peakrate, ptab, Pcell_log, mtu, linklayer) < 0) {
239 fprintf(stderr, "tbf: failed to calculate peak rate table.\n");
242 opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu);
245 tail = addattr_nest(n, 1024, TCA_OPTIONS);
246 addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt));
247 addattr_l(n, 2124, TCA_TBF_BURST, &buffer, sizeof(buffer));
248 if (rate64 >= (1ULL << 32))
249 addattr_l(n, 2124, TCA_TBF_RATE64, &rate64, sizeof(rate64));
250 addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024);
251 if (opt.peakrate.rate) {
252 if (prate64 >= (1ULL << 32))
253 addattr_l(n, 3124, TCA_TBF_PRATE64, &prate64, sizeof(prate64));
254 addattr_l(n, 3224, TCA_TBF_PBURST, &mtu, sizeof(mtu));
255 addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024);
257 addattr_nest_end(n, tail);
261 static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
263 struct rtattr *tb[TCA_TBF_MAX+1];
264 struct tc_tbf_qopt *qopt;
265 unsigned int linklayer;
267 double latency, lat2;
268 __u64 rate64 = 0, prate64 = 0;
277 parse_rtattr_nested(tb, TCA_TBF_MAX, opt);
279 if (tb[TCA_TBF_PARMS] == NULL)
282 qopt = RTA_DATA(tb[TCA_TBF_PARMS]);
283 if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt))
285 rate64 = qopt->rate.rate;
286 if (tb[TCA_TBF_RATE64] &&
287 RTA_PAYLOAD(tb[TCA_TBF_RATE64]) >= sizeof(rate64))
288 rate64 = rta_getattr_u64(tb[TCA_TBF_RATE64]);
289 print_u64(PRINT_JSON, "rate", NULL, rate64);
290 print_string(PRINT_FP, NULL, "rate %s ", sprint_rate(rate64, b1));
291 buffer = tc_calc_xmitsize(rate64, qopt->buffer);
293 sprintf(b1, "%s/%u", sprint_size(buffer, b2),
294 1 << qopt->rate.cell_log);
295 print_string(PRINT_ANY, "burst", "burst %s ", b1);
296 print_uint(PRINT_JSON, "mpu", NULL, qopt->rate.mpu);
297 print_string(PRINT_FP, NULL, "mpu %s ",
298 sprint_size(qopt->rate.mpu, b1));
300 print_u64(PRINT_JSON, "burst", NULL, buffer);
301 print_string(PRINT_FP, NULL, "burst %s ",
302 sprint_size(buffer, b1));
305 print_hex(PRINT_ANY, "burst_raw", "[%08x] ", qopt->buffer);
306 prate64 = qopt->peakrate.rate;
307 if (tb[TCA_TBF_PRATE64] &&
308 RTA_PAYLOAD(tb[TCA_TBF_PRATE64]) >= sizeof(prate64))
309 prate64 = rta_getattr_u64(tb[TCA_TBF_PRATE64]);
311 print_u64(PRINT_JSON, "peakrate", NULL, prate64);
312 print_string(PRINT_FP, NULL, "peakrate %s ",
313 sprint_rate(prate64, b1));
314 if (qopt->mtu || qopt->peakrate.mpu) {
315 mtu = tc_calc_xmitsize(prate64, qopt->mtu);
317 sprintf(b1, "%s/%u", sprint_size(mtu, b2),
318 1 << qopt->peakrate.cell_log);
319 print_string(PRINT_ANY, "mtu", "mtu %s ", b1);
320 print_uint(PRINT_JSON, "mpu", NULL,
322 print_string(PRINT_FP, NULL, "mpu %s ",
323 sprint_size(qopt->peakrate.mpu,
326 print_u64(PRINT_JSON, "minburst", NULL, mtu);
327 print_string(PRINT_FP, NULL, "minburst %s ",
328 sprint_size(mtu, b1));
331 print_hex(PRINT_ANY, "mtu_raw", "[%08x] ",
336 latency = TIME_UNITS_PER_SEC * (qopt->limit / (double)rate64) -
337 tc_core_tick2time(qopt->buffer);
339 lat2 = TIME_UNITS_PER_SEC * (qopt->limit / (double)prate64) -
340 tc_core_tick2time(qopt->mtu);
345 if (latency >= 0.0) {
346 print_u64(PRINT_JSON, "lat", NULL, latency);
347 print_string(PRINT_FP, NULL, "lat %s ",
348 sprint_time(latency, b1));
350 if (show_raw || latency < 0.0) {
351 print_uint(PRINT_JSON, "limit", NULL, qopt->limit);
352 print_string(PRINT_FP, NULL, "limit %s ",
353 sprint_size(qopt->limit, b1));
355 if (qopt->rate.overhead)
356 print_int(PRINT_ANY, "overhead", "overhead %d ",
357 qopt->rate.overhead);
358 linklayer = (qopt->rate.linklayer & TC_LINKLAYER_MASK);
359 if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
360 print_string(PRINT_ANY, "linklayer", "linklayer %s ",
361 sprint_linklayer(linklayer, b3));
366 struct qdisc_util tbf_qdisc_util = {
368 .parse_qopt = tbf_parse_opt,
369 .print_qopt = tbf_print_opt,