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aba5acdf SH |
1 | /* |
2 | * q_tbf.c TBF. | |
3 | * | |
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. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
aba5acdf SH |
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 | ||
25 | static void explain(void) | |
26 | { | |
27 | fprintf(stderr, "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n"); | |
2c42579f | 28 | fprintf(stderr, " [ peakrate KBPS ] [ latency TIME ] "); |
292f29b4 | 29 | fprintf(stderr, "[ overhead BYTES ] [ linklayer TYPE ]\n"); |
aba5acdf SH |
30 | } |
31 | ||
3bed7bb7 | 32 | static void explain1(const char *arg, const char *val) |
aba5acdf | 33 | { |
3bed7bb7 | 34 | fprintf(stderr, "tbf: illegal value for \"%s\": \"%s\"\n", arg, val); |
aba5acdf SH |
35 | } |
36 | ||
37 | ||
859af0a5 SH |
38 | static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, |
39 | struct nlmsghdr *n, const char *dev) | |
aba5acdf | 40 | { |
32a121cb | 41 | int ok = 0; |
d17b136f | 42 | struct tc_tbf_qopt opt = {}; |
aba5acdf SH |
43 | __u32 rtab[256]; |
44 | __u32 ptab[256]; | |
32a121cb SH |
45 | unsigned buffer = 0, mtu = 0, mpu = 0, latency = 0; |
46 | int Rcell_log = -1, Pcell_log = -1; | |
47 | unsigned short overhead = 0; | |
292f29b4 | 48 | unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ |
aba5acdf | 49 | struct rtattr *tail; |
ddc6243e | 50 | __u64 rate64 = 0, prate64 = 0; |
aba5acdf | 51 | |
aba5acdf SH |
52 | while (argc > 0) { |
53 | if (matches(*argv, "limit") == 0) { | |
54 | NEXT_ARG(); | |
3bed7bb7 KR |
55 | if (opt.limit) { |
56 | fprintf(stderr, "tbf: duplicate \"limit\" specification\n"); | |
57 | return -1; | |
58 | } | |
59 | if (latency) { | |
60 | fprintf(stderr, "tbf: specifying both \"latency\" and \"limit\" is not allowed\n"); | |
aba5acdf SH |
61 | return -1; |
62 | } | |
63 | if (get_size(&opt.limit, *argv)) { | |
3bed7bb7 | 64 | explain1("limit", *argv); |
aba5acdf SH |
65 | return -1; |
66 | } | |
67 | ok++; | |
68 | } else if (matches(*argv, "latency") == 0) { | |
69 | NEXT_ARG(); | |
3bed7bb7 KR |
70 | if (latency) { |
71 | fprintf(stderr, "tbf: duplicate \"latency\" specification\n"); | |
72 | return -1; | |
73 | } | |
74 | if (opt.limit) { | |
75 | fprintf(stderr, "tbf: specifying both \"limit\" and \"/latency\" is not allowed\n"); | |
aba5acdf SH |
76 | return -1; |
77 | } | |
8f34caaf | 78 | if (get_time(&latency, *argv)) { |
3bed7bb7 | 79 | explain1("latency", *argv); |
aba5acdf SH |
80 | return -1; |
81 | } | |
82 | ok++; | |
83 | } else if (matches(*argv, "burst") == 0 || | |
84 | strcmp(*argv, "buffer") == 0 || | |
85 | strcmp(*argv, "maxburst") == 0) { | |
3bed7bb7 | 86 | const char *parm_name = *argv; |
32a121cb | 87 | |
aba5acdf SH |
88 | NEXT_ARG(); |
89 | if (buffer) { | |
3bed7bb7 | 90 | fprintf(stderr, "tbf: duplicate \"buffer/burst/maxburst\" specification\n"); |
aba5acdf SH |
91 | return -1; |
92 | } | |
93 | if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { | |
3bed7bb7 | 94 | explain1(parm_name, *argv); |
aba5acdf SH |
95 | return -1; |
96 | } | |
97 | ok++; | |
98 | } else if (strcmp(*argv, "mtu") == 0 || | |
99 | strcmp(*argv, "minburst") == 0) { | |
3bed7bb7 | 100 | const char *parm_name = *argv; |
32a121cb | 101 | |
aba5acdf SH |
102 | NEXT_ARG(); |
103 | if (mtu) { | |
3bed7bb7 | 104 | fprintf(stderr, "tbf: duplicate \"mtu/minburst\" specification\n"); |
aba5acdf SH |
105 | return -1; |
106 | } | |
107 | if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) { | |
3bed7bb7 | 108 | explain1(parm_name, *argv); |
aba5acdf SH |
109 | return -1; |
110 | } | |
111 | ok++; | |
112 | } else if (strcmp(*argv, "mpu") == 0) { | |
113 | NEXT_ARG(); | |
114 | if (mpu) { | |
3bed7bb7 | 115 | fprintf(stderr, "tbf: duplicate \"mpu\" specification\n"); |
aba5acdf SH |
116 | return -1; |
117 | } | |
118 | if (get_size(&mpu, *argv)) { | |
3bed7bb7 | 119 | explain1("mpu", *argv); |
aba5acdf SH |
120 | return -1; |
121 | } | |
122 | ok++; | |
123 | } else if (strcmp(*argv, "rate") == 0) { | |
124 | NEXT_ARG(); | |
ddc6243e | 125 | if (rate64) { |
3bed7bb7 | 126 | fprintf(stderr, "tbf: duplicate \"rate\" specification\n"); |
aba5acdf SH |
127 | return -1; |
128 | } | |
927e3cfb ND |
129 | if (strchr(*argv, '%')) { |
130 | if (get_percent_rate64(&rate64, *argv, dev)) { | |
131 | explain1("rate", *argv); | |
132 | return -1; | |
133 | } | |
134 | } else if (get_rate64(&rate64, *argv)) { | |
3bed7bb7 | 135 | explain1("rate", *argv); |
aba5acdf SH |
136 | return -1; |
137 | } | |
138 | ok++; | |
139 | } else if (matches(*argv, "peakrate") == 0) { | |
140 | NEXT_ARG(); | |
ddc6243e | 141 | if (prate64) { |
3bed7bb7 | 142 | fprintf(stderr, "tbf: duplicate \"peakrate\" specification\n"); |
aba5acdf SH |
143 | return -1; |
144 | } | |
927e3cfb ND |
145 | if (strchr(*argv, '%')) { |
146 | if (get_percent_rate64(&prate64, *argv, dev)) { | |
147 | explain1("peakrate", *argv); | |
148 | return -1; | |
149 | } | |
150 | } else if (get_rate64(&prate64, *argv)) { | |
3bed7bb7 | 151 | explain1("peakrate", *argv); |
aba5acdf SH |
152 | return -1; |
153 | } | |
154 | ok++; | |
2c42579f JDB |
155 | } else if (matches(*argv, "overhead") == 0) { |
156 | NEXT_ARG(); | |
157 | if (overhead) { | |
3bed7bb7 | 158 | fprintf(stderr, "tbf: duplicate \"overhead\" specification\n"); |
2c42579f JDB |
159 | return -1; |
160 | } | |
161 | if (get_u16(&overhead, *argv, 10)) { | |
3bed7bb7 | 162 | explain1("overhead", *argv); return -1; |
2c42579f | 163 | } |
292f29b4 JDB |
164 | } else if (matches(*argv, "linklayer") == 0) { |
165 | NEXT_ARG(); | |
166 | if (get_linklayer(&linklayer, *argv)) { | |
3bed7bb7 | 167 | explain1("linklayer", *argv); return -1; |
292f29b4 | 168 | } |
aba5acdf SH |
169 | } else if (strcmp(*argv, "help") == 0) { |
170 | explain(); | |
171 | return -1; | |
172 | } else { | |
3bed7bb7 | 173 | fprintf(stderr, "tbf: unknown parameter \"%s\"\n", *argv); |
aba5acdf SH |
174 | explain(); |
175 | return -1; | |
176 | } | |
177 | argc--; argv++; | |
178 | } | |
179 | ||
32a121cb | 180 | int verdict = 0; |
aba5acdf | 181 | |
32a121cb SH |
182 | /* Be nice to the user: try to emit all error messages in |
183 | * one go rather than reveal one more problem when a | |
184 | * previous one has been fixed. | |
185 | */ | |
ddc6243e | 186 | if (rate64 == 0) { |
3bed7bb7 KR |
187 | fprintf(stderr, "tbf: the \"rate\" parameter is mandatory.\n"); |
188 | verdict = -1; | |
189 | } | |
190 | if (!buffer) { | |
191 | fprintf(stderr, "tbf: the \"burst\" parameter is mandatory.\n"); | |
192 | verdict = -1; | |
aba5acdf | 193 | } |
ddc6243e | 194 | if (prate64) { |
aba5acdf | 195 | if (!mtu) { |
3bed7bb7 KR |
196 | fprintf(stderr, "tbf: when \"peakrate\" is specified, \"mtu\" must also be specified.\n"); |
197 | verdict = -1; | |
aba5acdf SH |
198 | } |
199 | } | |
200 | ||
201 | if (opt.limit == 0 && latency == 0) { | |
3bed7bb7 KR |
202 | fprintf(stderr, "tbf: either \"limit\" or \"latency\" is required.\n"); |
203 | verdict = -1; | |
aba5acdf SH |
204 | } |
205 | ||
32a121cb SH |
206 | if (verdict != 0) { |
207 | explain(); | |
208 | return verdict; | |
209 | } | |
3bed7bb7 | 210 | |
ddc6243e YY |
211 | opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64; |
212 | opt.peakrate.rate = (prate64 >= (1ULL << 32)) ? ~0U : prate64; | |
213 | ||
aba5acdf | 214 | if (opt.limit == 0) { |
ddc6243e | 215 | double lim = rate64*(double)latency/TIME_UNITS_PER_SEC + buffer; |
32a121cb | 216 | |
ddc6243e YY |
217 | if (prate64) { |
218 | double lim2 = prate64*(double)latency/TIME_UNITS_PER_SEC + mtu; | |
32a121cb | 219 | |
aba5acdf SH |
220 | if (lim2 < lim) |
221 | lim = lim2; | |
222 | } | |
223 | opt.limit = lim; | |
224 | } | |
225 | ||
2c42579f JDB |
226 | opt.rate.mpu = mpu; |
227 | opt.rate.overhead = overhead; | |
292f29b4 | 228 | if (tc_calc_rtable(&opt.rate, rtab, Rcell_log, mtu, linklayer) < 0) { |
3bed7bb7 | 229 | fprintf(stderr, "tbf: failed to calculate rate table.\n"); |
aba5acdf SH |
230 | return -1; |
231 | } | |
232 | opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer); | |
d5f46f9c | 233 | |
aba5acdf | 234 | if (opt.peakrate.rate) { |
2c42579f JDB |
235 | opt.peakrate.mpu = mpu; |
236 | opt.peakrate.overhead = overhead; | |
292f29b4 | 237 | if (tc_calc_rtable(&opt.peakrate, ptab, Pcell_log, mtu, linklayer) < 0) { |
3bed7bb7 | 238 | fprintf(stderr, "tbf: failed to calculate peak rate table.\n"); |
aba5acdf SH |
239 | return -1; |
240 | } | |
241 | opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu); | |
aba5acdf SH |
242 | } |
243 | ||
c14f9d92 | 244 | tail = addattr_nest(n, 1024, TCA_OPTIONS); |
aba5acdf | 245 | addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt)); |
a01de0a3 | 246 | addattr_l(n, 2124, TCA_TBF_BURST, &buffer, sizeof(buffer)); |
ddc6243e YY |
247 | if (rate64 >= (1ULL << 32)) |
248 | addattr_l(n, 2124, TCA_TBF_RATE64, &rate64, sizeof(rate64)); | |
aba5acdf | 249 | addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024); |
ddc6243e YY |
250 | if (opt.peakrate.rate) { |
251 | if (prate64 >= (1ULL << 32)) | |
252 | addattr_l(n, 3124, TCA_TBF_PRATE64, &prate64, sizeof(prate64)); | |
a01de0a3 | 253 | addattr_l(n, 3224, TCA_TBF_PBURST, &mtu, sizeof(mtu)); |
aba5acdf | 254 | addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024); |
ddc6243e | 255 | } |
c14f9d92 | 256 | addattr_nest_end(n, tail); |
aba5acdf SH |
257 | return 0; |
258 | } | |
259 | ||
260 | static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
261 | { | |
ddc6243e | 262 | struct rtattr *tb[TCA_TBF_MAX+1]; |
aba5acdf | 263 | struct tc_tbf_qopt *qopt; |
3e92ff52 | 264 | unsigned int linklayer; |
aba5acdf SH |
265 | double buffer, mtu; |
266 | double latency; | |
ddc6243e | 267 | __u64 rate64 = 0, prate64 = 0; |
32a121cb | 268 | |
aba5acdf SH |
269 | SPRINT_BUF(b1); |
270 | SPRINT_BUF(b2); | |
3e92ff52 | 271 | SPRINT_BUF(b3); |
aba5acdf SH |
272 | |
273 | if (opt == NULL) | |
274 | return 0; | |
275 | ||
ddc6243e | 276 | parse_rtattr_nested(tb, TCA_TBF_MAX, opt); |
aba5acdf SH |
277 | |
278 | if (tb[TCA_TBF_PARMS] == NULL) | |
279 | return -1; | |
280 | ||
281 | qopt = RTA_DATA(tb[TCA_TBF_PARMS]); | |
282 | if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt)) | |
283 | return -1; | |
ddc6243e YY |
284 | rate64 = qopt->rate.rate; |
285 | if (tb[TCA_TBF_RATE64] && | |
286 | RTA_PAYLOAD(tb[TCA_TBF_RATE64]) >= sizeof(rate64)) | |
287 | rate64 = rta_getattr_u64(tb[TCA_TBF_RATE64]); | |
288 | fprintf(f, "rate %s ", sprint_rate(rate64, b1)); | |
289 | buffer = tc_calc_xmitsize(rate64, qopt->buffer); | |
aba5acdf SH |
290 | if (show_details) { |
291 | fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1), | |
292 | 1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2)); | |
293 | } else { | |
294 | fprintf(f, "burst %s ", sprint_size(buffer, b1)); | |
295 | } | |
296 | if (show_raw) | |
297 | fprintf(f, "[%08x] ", qopt->buffer); | |
ddc6243e YY |
298 | prate64 = qopt->peakrate.rate; |
299 | if (tb[TCA_TBF_PRATE64] && | |
300 | RTA_PAYLOAD(tb[TCA_TBF_PRATE64]) >= sizeof(prate64)) | |
301 | prate64 = rta_getattr_u64(tb[TCA_TBF_PRATE64]); | |
302 | if (prate64) { | |
303 | fprintf(f, "peakrate %s ", sprint_rate(prate64, b1)); | |
aba5acdf | 304 | if (qopt->mtu || qopt->peakrate.mpu) { |
ddc6243e | 305 | mtu = tc_calc_xmitsize(prate64, qopt->mtu); |
aba5acdf SH |
306 | if (show_details) { |
307 | fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1), | |
308 | 1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2)); | |
309 | } else { | |
310 | fprintf(f, "minburst %s ", sprint_size(mtu, b1)); | |
311 | } | |
312 | if (show_raw) | |
313 | fprintf(f, "[%08x] ", qopt->mtu); | |
314 | } | |
315 | } | |
316 | ||
ddc6243e YY |
317 | latency = TIME_UNITS_PER_SEC*(qopt->limit/(double)rate64) - tc_core_tick2time(qopt->buffer); |
318 | if (prate64) { | |
319 | double lat2 = TIME_UNITS_PER_SEC*(qopt->limit/(double)prate64) - tc_core_tick2time(qopt->mtu); | |
32a121cb | 320 | |
aba5acdf SH |
321 | if (lat2 > latency) |
322 | latency = lat2; | |
323 | } | |
3ff10e82 SL |
324 | if (latency >= 0.0) |
325 | fprintf(f, "lat %s ", sprint_time(latency, b1)); | |
326 | if (show_raw || latency < 0.0) | |
327 | fprintf(f, "limit %s ", sprint_size(qopt->limit, b1)); | |
aba5acdf | 328 | |
2c42579f JDB |
329 | if (qopt->rate.overhead) { |
330 | fprintf(f, "overhead %d", qopt->rate.overhead); | |
331 | } | |
3e92ff52 JDB |
332 | linklayer = (qopt->rate.linklayer & TC_LINKLAYER_MASK); |
333 | if (linklayer > TC_LINKLAYER_ETHERNET || show_details) | |
334 | fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b3)); | |
2c42579f | 335 | |
aba5acdf SH |
336 | return 0; |
337 | } | |
338 | ||
95812b56 | 339 | struct qdisc_util tbf_qdisc_util = { |
f2f99e2e SH |
340 | .id = "tbf", |
341 | .parse_qopt = tbf_parse_opt, | |
342 | .print_qopt = tbf_print_opt, | |
aba5acdf | 343 | }; |