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13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <fcntl.h>
17#include <sys/socket.h>
18#include <netinet/in.h>
19#include <arpa/inet.h>
20#include <string.h>
21
22#include "utils.h"
23#include "tc_util.h"
24
25static void explain(void)
26{
27 fprintf(stderr,
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");
31}
32
33static void explain1(const char *arg, const char *val)
34{
35 fprintf(stderr, "tbf: illegal value for \"%s\": \"%s\"\n", arg, val);
36}
37
38
39static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv,
40 struct nlmsghdr *n, const char *dev)
41{
42 int ok = 0;
43 struct tc_tbf_qopt opt = {};
44 __u32 rtab[256];
45 __u32 ptab[256];
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;
50 struct rtattr *tail;
51 __u64 rate64 = 0, prate64 = 0;
52
53 while (argc > 0) {
54 if (matches(*argv, "limit") == 0) {
55 NEXT_ARG();
56 if (opt.limit) {
57 fprintf(stderr, "tbf: duplicate \"limit\" specification\n");
58 return -1;
59 }
60 if (latency) {
61 fprintf(stderr, "tbf: specifying both \"latency\" and \"limit\" is not allowed\n");
62 return -1;
63 }
64 if (get_size(&opt.limit, *argv)) {
65 explain1("limit", *argv);
66 return -1;
67 }
68 ok++;
69 } else if (matches(*argv, "latency") == 0) {
70 NEXT_ARG();
71 if (latency) {
72 fprintf(stderr, "tbf: duplicate \"latency\" specification\n");
73 return -1;
74 }
75 if (opt.limit) {
76 fprintf(stderr, "tbf: specifying both \"limit\" and \"/latency\" is not allowed\n");
77 return -1;
78 }
79 if (get_time(&latency, *argv)) {
80 explain1("latency", *argv);
81 return -1;
82 }
83 ok++;
84 } else if (matches(*argv, "burst") == 0 ||
85 strcmp(*argv, "buffer") == 0 ||
86 strcmp(*argv, "maxburst") == 0) {
87 const char *parm_name = *argv;
88
89 NEXT_ARG();
90 if (buffer) {
91 fprintf(stderr, "tbf: duplicate \"buffer/burst/maxburst\" specification\n");
92 return -1;
93 }
94 if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
95 explain1(parm_name, *argv);
96 return -1;
97 }
98 ok++;
99 } else if (strcmp(*argv, "mtu") == 0 ||
100 strcmp(*argv, "minburst") == 0) {
101 const char *parm_name = *argv;
102
103 NEXT_ARG();
104 if (mtu) {
105 fprintf(stderr, "tbf: duplicate \"mtu/minburst\" specification\n");
106 return -1;
107 }
108 if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
109 explain1(parm_name, *argv);
110 return -1;
111 }
112 ok++;
113 } else if (strcmp(*argv, "mpu") == 0) {
114 NEXT_ARG();
115 if (mpu) {
116 fprintf(stderr, "tbf: duplicate \"mpu\" specification\n");
117 return -1;
118 }
119 if (get_size(&mpu, *argv)) {
120 explain1("mpu", *argv);
121 return -1;
122 }
123 ok++;
124 } else if (strcmp(*argv, "rate") == 0) {
125 NEXT_ARG();
126 if (rate64) {
127 fprintf(stderr, "tbf: duplicate \"rate\" specification\n");
128 return -1;
129 }
130 if (strchr(*argv, '%')) {
131 if (get_percent_rate64(&rate64, *argv, dev)) {
132 explain1("rate", *argv);
133 return -1;
134 }
135 } else if (get_rate64(&rate64, *argv)) {
136 explain1("rate", *argv);
137 return -1;
138 }
139 ok++;
140 } else if (matches(*argv, "peakrate") == 0) {
141 NEXT_ARG();
142 if (prate64) {
143 fprintf(stderr, "tbf: duplicate \"peakrate\" specification\n");
144 return -1;
145 }
146 if (strchr(*argv, '%')) {
147 if (get_percent_rate64(&prate64, *argv, dev)) {
148 explain1("peakrate", *argv);
149 return -1;
150 }
151 } else if (get_rate64(&prate64, *argv)) {
152 explain1("peakrate", *argv);
153 return -1;
154 }
155 ok++;
156 } else if (matches(*argv, "overhead") == 0) {
157 NEXT_ARG();
158 if (overhead) {
159 fprintf(stderr, "tbf: duplicate \"overhead\" specification\n");
160 return -1;
161 }
162 if (get_u16(&overhead, *argv, 10)) {
163 explain1("overhead", *argv); return -1;
164 }
165 } else if (matches(*argv, "linklayer") == 0) {
166 NEXT_ARG();
167 if (get_linklayer(&linklayer, *argv)) {
168 explain1("linklayer", *argv); return -1;
169 }
170 } else if (strcmp(*argv, "help") == 0) {
171 explain();
172 return -1;
173 } else {
174 fprintf(stderr, "tbf: unknown parameter \"%s\"\n", *argv);
175 explain();
176 return -1;
177 }
178 argc--; argv++;
179 }
180
181 int verdict = 0;
182
183
184
185
186
187 if (rate64 == 0) {
188 fprintf(stderr, "tbf: the \"rate\" parameter is mandatory.\n");
189 verdict = -1;
190 }
191 if (!buffer) {
192 fprintf(stderr, "tbf: the \"burst\" parameter is mandatory.\n");
193 verdict = -1;
194 }
195 if (prate64) {
196 if (!mtu) {
197 fprintf(stderr, "tbf: when \"peakrate\" is specified, \"mtu\" must also be specified.\n");
198 verdict = -1;
199 }
200 }
201
202 if (opt.limit == 0 && latency == 0) {
203 fprintf(stderr, "tbf: either \"limit\" or \"latency\" is required.\n");
204 verdict = -1;
205 }
206
207 if (verdict != 0) {
208 explain();
209 return verdict;
210 }
211
212 opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64;
213 opt.peakrate.rate = (prate64 >= (1ULL << 32)) ? ~0U : prate64;
214
215 if (opt.limit == 0) {
216 double lim = rate64*(double)latency/TIME_UNITS_PER_SEC + buffer;
217
218 if (prate64) {
219 double lim2 = prate64*(double)latency/TIME_UNITS_PER_SEC + mtu;
220
221 if (lim2 < lim)
222 lim = lim2;
223 }
224 opt.limit = lim;
225 }
226
227 opt.rate.mpu = mpu;
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");
231 return -1;
232 }
233 opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
234
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");
240 return -1;
241 }
242 opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu);
243 }
244
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);
256 }
257 addattr_nest_end(n, tail);
258 return 0;
259}
260
261static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
262{
263 struct rtattr *tb[TCA_TBF_MAX+1];
264 struct tc_tbf_qopt *qopt;
265 unsigned int linklayer;
266 double buffer, mtu;
267 double latency, lat2;
268 __u64 rate64 = 0, prate64 = 0;
269
270 SPRINT_BUF(b1);
271 SPRINT_BUF(b2);
272 SPRINT_BUF(b3);
273
274 if (opt == NULL)
275 return 0;
276
277 parse_rtattr_nested(tb, TCA_TBF_MAX, opt);
278
279 if (tb[TCA_TBF_PARMS] == NULL)
280 return -1;
281
282 qopt = RTA_DATA(tb[TCA_TBF_PARMS]);
283 if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt))
284 return -1;
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 tc_print_rate(PRINT_ANY, "rate", "rate %s ", rate64);
290 buffer = tc_calc_xmitsize(rate64, qopt->buffer);
291 if (show_details) {
292 sprintf(b1, "%s/%u", sprint_size(buffer, b2),
293 1 << qopt->rate.cell_log);
294 print_string(PRINT_ANY, "burst", "burst %s ", b1);
295 print_size(PRINT_ANY, "mpu", "mpu %s ", qopt->rate.mpu);
296 } else {
297 print_size(PRINT_ANY, "burst", "burst %s ", buffer);
298 }
299 if (show_raw)
300 print_hex(PRINT_ANY, "burst_raw", "[%08x] ", qopt->buffer);
301 prate64 = qopt->peakrate.rate;
302 if (tb[TCA_TBF_PRATE64] &&
303 RTA_PAYLOAD(tb[TCA_TBF_PRATE64]) >= sizeof(prate64))
304 prate64 = rta_getattr_u64(tb[TCA_TBF_PRATE64]);
305 if (prate64) {
306 tc_print_rate(PRINT_FP, "peakrate", "peakrate %s ", prate64);
307 if (qopt->mtu || qopt->peakrate.mpu) {
308 mtu = tc_calc_xmitsize(prate64, qopt->mtu);
309 if (show_details) {
310 sprintf(b1, "%s/%u", sprint_size(mtu, b2),
311 1 << qopt->peakrate.cell_log);
312 print_string(PRINT_ANY, "mtu", "mtu %s ", b1);
313 print_size(PRINT_ANY, "mpu", "mpu %s ",
314 qopt->peakrate.mpu);
315 } else {
316 print_size(PRINT_ANY, "minburst",
317 "minburst %s ", mtu);
318 }
319 if (show_raw)
320 print_hex(PRINT_ANY, "mtu_raw", "[%08x] ",
321 qopt->mtu);
322 }
323 }
324
325 latency = TIME_UNITS_PER_SEC * (qopt->limit / (double)rate64) -
326 tc_core_tick2time(qopt->buffer);
327 if (prate64) {
328 lat2 = TIME_UNITS_PER_SEC * (qopt->limit / (double)prate64) -
329 tc_core_tick2time(qopt->mtu);
330
331 if (lat2 > latency)
332 latency = lat2;
333 }
334 if (latency >= 0.0) {
335 print_u64(PRINT_JSON, "lat", NULL, latency);
336 print_string(PRINT_FP, NULL, "lat %s ",
337 sprint_time(latency, b1));
338 }
339 if (show_raw || latency < 0.0)
340 print_size(PRINT_ANY, "limit", "limit %s ", qopt->limit);
341 if (qopt->rate.overhead)
342 print_int(PRINT_ANY, "overhead", "overhead %d ",
343 qopt->rate.overhead);
344 linklayer = (qopt->rate.linklayer & TC_LINKLAYER_MASK);
345 if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
346 print_string(PRINT_ANY, "linklayer", "linklayer %s ",
347 sprint_linklayer(linklayer, b3));
348
349 return 0;
350}
351
352struct qdisc_util tbf_qdisc_util = {
353 .id = "tbf",
354 .parse_qopt = tbf_parse_opt,
355 .print_qopt = tbf_print_opt,
356};
357
