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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> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <sys/socket.h> | |
19 | #include <netinet/in.h> | |
20 | #include <arpa/inet.h> | |
21 | #include <string.h> | |
22 | ||
23 | #include "utils.h" | |
24 | #include "tc_util.h" | |
25 | ||
26 | static void explain(void) | |
27 | { | |
28 | fprintf(stderr, "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n"); | |
2c42579f | 29 | fprintf(stderr, " [ peakrate KBPS ] [ latency TIME ] "); |
292f29b4 | 30 | fprintf(stderr, "[ overhead BYTES ] [ linklayer TYPE ]\n"); |
aba5acdf SH |
31 | } |
32 | ||
3bed7bb7 | 33 | static void explain1(const char *arg, const char *val) |
aba5acdf | 34 | { |
3bed7bb7 | 35 | fprintf(stderr, "tbf: illegal value for \"%s\": \"%s\"\n", arg, val); |
aba5acdf SH |
36 | } |
37 | ||
38 | ||
aba5acdf SH |
39 | static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) |
40 | { | |
41 | int ok=0; | |
42 | struct tc_tbf_qopt opt; | |
43 | __u32 rtab[256]; | |
44 | __u32 ptab[256]; | |
45 | unsigned buffer=0, mtu=0, mpu=0, latency=0; | |
ae665a52 | 46 | int Rcell_log=-1, Pcell_log = -1; |
2c42579f | 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 SH |
51 | |
52 | memset(&opt, 0, sizeof(opt)); | |
53 | ||
54 | while (argc > 0) { | |
55 | if (matches(*argv, "limit") == 0) { | |
56 | NEXT_ARG(); | |
3bed7bb7 KR |
57 | if (opt.limit) { |
58 | fprintf(stderr, "tbf: duplicate \"limit\" specification\n"); | |
59 | return -1; | |
60 | } | |
61 | if (latency) { | |
62 | fprintf(stderr, "tbf: specifying both \"latency\" and \"limit\" is not allowed\n"); | |
aba5acdf SH |
63 | return -1; |
64 | } | |
65 | if (get_size(&opt.limit, *argv)) { | |
3bed7bb7 | 66 | explain1("limit", *argv); |
aba5acdf SH |
67 | return -1; |
68 | } | |
69 | ok++; | |
70 | } else if (matches(*argv, "latency") == 0) { | |
71 | NEXT_ARG(); | |
3bed7bb7 KR |
72 | if (latency) { |
73 | fprintf(stderr, "tbf: duplicate \"latency\" specification\n"); | |
74 | return -1; | |
75 | } | |
76 | if (opt.limit) { | |
77 | fprintf(stderr, "tbf: specifying both \"limit\" and \"/latency\" is not allowed\n"); | |
aba5acdf SH |
78 | return -1; |
79 | } | |
8f34caaf | 80 | if (get_time(&latency, *argv)) { |
3bed7bb7 | 81 | explain1("latency", *argv); |
aba5acdf SH |
82 | return -1; |
83 | } | |
84 | ok++; | |
85 | } else if (matches(*argv, "burst") == 0 || | |
86 | strcmp(*argv, "buffer") == 0 || | |
87 | strcmp(*argv, "maxburst") == 0) { | |
3bed7bb7 | 88 | const char *parm_name = *argv; |
aba5acdf SH |
89 | NEXT_ARG(); |
90 | if (buffer) { | |
3bed7bb7 | 91 | fprintf(stderr, "tbf: duplicate \"buffer/burst/maxburst\" specification\n"); |
aba5acdf SH |
92 | return -1; |
93 | } | |
94 | if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { | |
3bed7bb7 | 95 | explain1(parm_name, *argv); |
aba5acdf SH |
96 | return -1; |
97 | } | |
98 | ok++; | |
99 | } else if (strcmp(*argv, "mtu") == 0 || | |
100 | strcmp(*argv, "minburst") == 0) { | |
3bed7bb7 | 101 | const char *parm_name = *argv; |
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 | } | |
ddc6243e | 129 | if (get_rate64(&rate64, *argv)) { |
3bed7bb7 | 130 | explain1("rate", *argv); |
aba5acdf SH |
131 | return -1; |
132 | } | |
133 | ok++; | |
134 | } else if (matches(*argv, "peakrate") == 0) { | |
135 | NEXT_ARG(); | |
ddc6243e | 136 | if (prate64) { |
3bed7bb7 | 137 | fprintf(stderr, "tbf: duplicate \"peakrate\" specification\n"); |
aba5acdf SH |
138 | return -1; |
139 | } | |
ddc6243e | 140 | if (get_rate64(&prate64, *argv)) { |
3bed7bb7 | 141 | explain1("peakrate", *argv); |
aba5acdf SH |
142 | return -1; |
143 | } | |
144 | ok++; | |
2c42579f JDB |
145 | } else if (matches(*argv, "overhead") == 0) { |
146 | NEXT_ARG(); | |
147 | if (overhead) { | |
3bed7bb7 | 148 | fprintf(stderr, "tbf: duplicate \"overhead\" specification\n"); |
2c42579f JDB |
149 | return -1; |
150 | } | |
151 | if (get_u16(&overhead, *argv, 10)) { | |
3bed7bb7 | 152 | explain1("overhead", *argv); return -1; |
2c42579f | 153 | } |
292f29b4 JDB |
154 | } else if (matches(*argv, "linklayer") == 0) { |
155 | NEXT_ARG(); | |
156 | if (get_linklayer(&linklayer, *argv)) { | |
3bed7bb7 | 157 | explain1("linklayer", *argv); return -1; |
292f29b4 | 158 | } |
aba5acdf SH |
159 | } else if (strcmp(*argv, "help") == 0) { |
160 | explain(); | |
161 | return -1; | |
162 | } else { | |
3bed7bb7 | 163 | fprintf(stderr, "tbf: unknown parameter \"%s\"\n", *argv); |
aba5acdf SH |
164 | explain(); |
165 | return -1; | |
166 | } | |
167 | argc--; argv++; | |
168 | } | |
169 | ||
3bed7bb7 | 170 | int verdict = 0; |
aba5acdf | 171 | |
3bed7bb7 KR |
172 | /* Be nice to the user: try to emit all error messages in |
173 | * one go rather than reveal one more problem when a | |
174 | * previous one has been fixed. | |
175 | */ | |
ddc6243e | 176 | if (rate64 == 0) { |
3bed7bb7 KR |
177 | fprintf(stderr, "tbf: the \"rate\" parameter is mandatory.\n"); |
178 | verdict = -1; | |
179 | } | |
180 | if (!buffer) { | |
181 | fprintf(stderr, "tbf: the \"burst\" parameter is mandatory.\n"); | |
182 | verdict = -1; | |
aba5acdf | 183 | } |
ddc6243e | 184 | if (prate64) { |
aba5acdf | 185 | if (!mtu) { |
3bed7bb7 KR |
186 | fprintf(stderr, "tbf: when \"peakrate\" is specified, \"mtu\" must also be specified.\n"); |
187 | verdict = -1; | |
aba5acdf SH |
188 | } |
189 | } | |
190 | ||
191 | if (opt.limit == 0 && latency == 0) { | |
3bed7bb7 KR |
192 | fprintf(stderr, "tbf: either \"limit\" or \"latency\" is required.\n"); |
193 | verdict = -1; | |
aba5acdf SH |
194 | } |
195 | ||
3bed7bb7 KR |
196 | if (verdict != 0) { |
197 | explain(); | |
198 | return verdict; | |
199 | } | |
200 | ||
ddc6243e YY |
201 | opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64; |
202 | opt.peakrate.rate = (prate64 >= (1ULL << 32)) ? ~0U : prate64; | |
203 | ||
aba5acdf | 204 | if (opt.limit == 0) { |
ddc6243e YY |
205 | double lim = rate64*(double)latency/TIME_UNITS_PER_SEC + buffer; |
206 | if (prate64) { | |
207 | double lim2 = prate64*(double)latency/TIME_UNITS_PER_SEC + mtu; | |
aba5acdf SH |
208 | if (lim2 < lim) |
209 | lim = lim2; | |
210 | } | |
211 | opt.limit = lim; | |
212 | } | |
213 | ||
2c42579f JDB |
214 | opt.rate.mpu = mpu; |
215 | opt.rate.overhead = overhead; | |
292f29b4 | 216 | if (tc_calc_rtable(&opt.rate, rtab, Rcell_log, mtu, linklayer) < 0) { |
3bed7bb7 | 217 | fprintf(stderr, "tbf: failed to calculate rate table.\n"); |
aba5acdf SH |
218 | return -1; |
219 | } | |
220 | opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer); | |
d5f46f9c | 221 | |
aba5acdf | 222 | if (opt.peakrate.rate) { |
2c42579f JDB |
223 | opt.peakrate.mpu = mpu; |
224 | opt.peakrate.overhead = overhead; | |
292f29b4 | 225 | if (tc_calc_rtable(&opt.peakrate, ptab, Pcell_log, mtu, linklayer) < 0) { |
3bed7bb7 | 226 | fprintf(stderr, "tbf: failed to calculate peak rate table.\n"); |
aba5acdf SH |
227 | return -1; |
228 | } | |
229 | opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu); | |
aba5acdf SH |
230 | } |
231 | ||
228569c3 | 232 | tail = NLMSG_TAIL(n); |
aba5acdf SH |
233 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
234 | addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt)); | |
a01de0a3 | 235 | addattr_l(n, 2124, TCA_TBF_BURST, &buffer, sizeof(buffer)); |
ddc6243e YY |
236 | if (rate64 >= (1ULL << 32)) |
237 | addattr_l(n, 2124, TCA_TBF_RATE64, &rate64, sizeof(rate64)); | |
aba5acdf | 238 | addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024); |
ddc6243e YY |
239 | if (opt.peakrate.rate) { |
240 | if (prate64 >= (1ULL << 32)) | |
241 | addattr_l(n, 3124, TCA_TBF_PRATE64, &prate64, sizeof(prate64)); | |
a01de0a3 | 242 | addattr_l(n, 3224, TCA_TBF_PBURST, &mtu, sizeof(mtu)); |
aba5acdf | 243 | addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024); |
ddc6243e | 244 | } |
228569c3 | 245 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
aba5acdf SH |
246 | return 0; |
247 | } | |
248 | ||
249 | static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
250 | { | |
ddc6243e | 251 | struct rtattr *tb[TCA_TBF_MAX+1]; |
aba5acdf | 252 | struct tc_tbf_qopt *qopt; |
3e92ff52 | 253 | unsigned int linklayer; |
aba5acdf SH |
254 | double buffer, mtu; |
255 | double latency; | |
ddc6243e | 256 | __u64 rate64 = 0, prate64 = 0; |
aba5acdf SH |
257 | SPRINT_BUF(b1); |
258 | SPRINT_BUF(b2); | |
3e92ff52 | 259 | SPRINT_BUF(b3); |
aba5acdf SH |
260 | |
261 | if (opt == NULL) | |
262 | return 0; | |
263 | ||
ddc6243e | 264 | parse_rtattr_nested(tb, TCA_TBF_MAX, opt); |
aba5acdf SH |
265 | |
266 | if (tb[TCA_TBF_PARMS] == NULL) | |
267 | return -1; | |
268 | ||
269 | qopt = RTA_DATA(tb[TCA_TBF_PARMS]); | |
270 | if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt)) | |
271 | return -1; | |
ddc6243e YY |
272 | rate64 = qopt->rate.rate; |
273 | if (tb[TCA_TBF_RATE64] && | |
274 | RTA_PAYLOAD(tb[TCA_TBF_RATE64]) >= sizeof(rate64)) | |
275 | rate64 = rta_getattr_u64(tb[TCA_TBF_RATE64]); | |
276 | fprintf(f, "rate %s ", sprint_rate(rate64, b1)); | |
277 | buffer = tc_calc_xmitsize(rate64, qopt->buffer); | |
aba5acdf SH |
278 | if (show_details) { |
279 | fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1), | |
280 | 1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2)); | |
281 | } else { | |
282 | fprintf(f, "burst %s ", sprint_size(buffer, b1)); | |
283 | } | |
284 | if (show_raw) | |
285 | fprintf(f, "[%08x] ", qopt->buffer); | |
ddc6243e YY |
286 | prate64 = qopt->peakrate.rate; |
287 | if (tb[TCA_TBF_PRATE64] && | |
288 | RTA_PAYLOAD(tb[TCA_TBF_PRATE64]) >= sizeof(prate64)) | |
289 | prate64 = rta_getattr_u64(tb[TCA_TBF_PRATE64]); | |
290 | if (prate64) { | |
291 | fprintf(f, "peakrate %s ", sprint_rate(prate64, b1)); | |
aba5acdf | 292 | if (qopt->mtu || qopt->peakrate.mpu) { |
ddc6243e | 293 | mtu = tc_calc_xmitsize(prate64, qopt->mtu); |
aba5acdf SH |
294 | if (show_details) { |
295 | fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1), | |
296 | 1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2)); | |
297 | } else { | |
298 | fprintf(f, "minburst %s ", sprint_size(mtu, b1)); | |
299 | } | |
300 | if (show_raw) | |
301 | fprintf(f, "[%08x] ", qopt->mtu); | |
302 | } | |
303 | } | |
304 | ||
ddc6243e YY |
305 | latency = TIME_UNITS_PER_SEC*(qopt->limit/(double)rate64) - tc_core_tick2time(qopt->buffer); |
306 | if (prate64) { | |
307 | double lat2 = TIME_UNITS_PER_SEC*(qopt->limit/(double)prate64) - tc_core_tick2time(qopt->mtu); | |
aba5acdf SH |
308 | if (lat2 > latency) |
309 | latency = lat2; | |
310 | } | |
3ff10e82 SL |
311 | if (latency >= 0.0) |
312 | fprintf(f, "lat %s ", sprint_time(latency, b1)); | |
313 | if (show_raw || latency < 0.0) | |
314 | fprintf(f, "limit %s ", sprint_size(qopt->limit, b1)); | |
aba5acdf | 315 | |
2c42579f JDB |
316 | if (qopt->rate.overhead) { |
317 | fprintf(f, "overhead %d", qopt->rate.overhead); | |
318 | } | |
3e92ff52 JDB |
319 | linklayer = (qopt->rate.linklayer & TC_LINKLAYER_MASK); |
320 | if (linklayer > TC_LINKLAYER_ETHERNET || show_details) | |
321 | fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b3)); | |
2c42579f | 322 | |
aba5acdf SH |
323 | return 0; |
324 | } | |
325 | ||
95812b56 | 326 | struct qdisc_util tbf_qdisc_util = { |
f2f99e2e SH |
327 | .id = "tbf", |
328 | .parse_qopt = tbf_parse_opt, | |
329 | .print_qopt = tbf_print_opt, | |
aba5acdf SH |
330 | }; |
331 |