Lines Matching defs:*
2 * q_hfsc.c HFSC.
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: Patrick McHardy, <kaber@trash.net>
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 #include <math.h>
24 #include "utils.h"
25 #include "tc_util.h"
27 static int hfsc_get_sc(int *, char ***, struct tc_service_curve *);
30 static void
31 explain_qdisc(void)
33 fprintf(stderr,
34 "Usage: ... hfsc [ default CLASSID ]\n"
35 "\n"
36 " default: default class for unclassified packets\n"
40 static void
41 explain_class(void)
43 fprintf(stderr,
44 "Usage: ... hfsc [ [ rt SC ] [ ls SC ] | [ sc SC ] ] [ ul SC ]\n"
45 "\n"
46 "SC := [ [ m1 BPS ] [ d SEC ] m2 BPS\n"
47 "\n"
48 " m1 : slope of first segment\n"
49 " d : x-coordinate of intersection\n"
50 " m2 : slope of second segment\n"
51 "\n"
52 "Alternative format:\n"
53 "\n"
54 "SC := [ [ umax BYTE ] dmax SEC ] rate BPS\n"
55 "\n"
56 " umax : maximum unit of work\n"
57 " dmax : maximum delay\n"
58 " rate : rate\n"
59 "\n"
63 static void
64 explain1(char *arg)
66 fprintf(stderr, "HFSC: Illegal \"%s\"\n", arg);
69 static int
70 hfsc_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
72 struct tc_hfsc_qopt qopt;
74 memset(&qopt, 0, sizeof(qopt));
76 while (argc > 0) {
77 if (matches(*argv, "default") == 0) {
78 NEXT_ARG();
79 if (qopt.defcls != 0) {
80 fprintf(stderr, "HFSC: Double \"default\"\n");
81 return -1;
83 if (get_u16(&qopt.defcls, *argv, 16) < 0) {
84 explain1("default");
85 return -1;
87 } else if (matches(*argv, "help") == 0) {
88 explain_qdisc();
89 return -1;
90 } else {
91 fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
92 explain_qdisc();
93 return -1;
95 argc--, argv++;
98 addattr_l(n, 1024, TCA_OPTIONS, &qopt, sizeof(qopt));
99 return 0;
102 static int
103 hfsc_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
105 struct tc_hfsc_qopt *qopt;
107 if (opt == NULL)
108 return 0;
109 if (RTA_PAYLOAD(opt) < sizeof(*qopt))
110 return -1;
111 qopt = RTA_DATA(opt);
113 if (qopt->defcls != 0)
114 fprintf(f, "default %x ", qopt->defcls);
116 return 0;
119 static int
120 hfsc_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
122 struct tc_hfsc_stats *st;
124 if (xstats == NULL)
125 return 0;
126 if (RTA_PAYLOAD(xstats) < sizeof(*st))
127 return -1;
128 st = RTA_DATA(xstats);
130 fprintf(f, " period %u ", st->period);
131 if (st->work != 0)
132 fprintf(f, "work %llu bytes ", (unsigned long long) st->work);
133 if (st->rtwork != 0)
134 fprintf(f, "rtwork %llu bytes ", (unsigned long long) st->rtwork);
135 fprintf(f, "level %u ", st->level);
136 fprintf(f, "\n");
138 return 0;
141 static int
142 hfsc_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
143 struct nlmsghdr *n)
145 struct tc_service_curve rsc, fsc, usc;
146 int rsc_ok, fsc_ok, usc_ok;
147 struct rtattr *tail;
149 memset(&rsc, 0, sizeof(rsc));
150 memset(&fsc, 0, sizeof(fsc));
151 memset(&usc, 0, sizeof(usc));
152 rsc_ok = fsc_ok = usc_ok = 0;
154 while (argc > 0) {
155 if (matches(*argv, "rt") == 0) {
156 NEXT_ARG();
157 if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
158 explain1("rt");
159 return -1;
161 rsc_ok = 1;
162 } else if (matches(*argv, "ls") == 0) {
163 NEXT_ARG();
164 if (hfsc_get_sc(&argc, &argv, &fsc) < 0) {
165 explain1("ls");
166 return -1;
168 fsc_ok = 1;
169 } else if (matches(*argv, "sc") == 0) {
170 NEXT_ARG();
171 if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
172 explain1("sc");
173 return -1;
175 memcpy(&fsc, &rsc, sizeof(fsc));
176 rsc_ok = 1;
177 fsc_ok = 1;
178 } else if (matches(*argv, "ul") == 0) {
179 NEXT_ARG();
180 if (hfsc_get_sc(&argc, &argv, &usc) < 0) {
181 explain1("ul");
182 return -1;
184 usc_ok = 1;
185 } else if (matches(*argv, "help") == 0) {
186 explain_class();
187 return -1;
188 } else {
189 fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
190 explain_class();
191 return -1;
193 argc--, argv++;
196 if (!(rsc_ok || fsc_ok || usc_ok)) {
197 fprintf(stderr, "HFSC: no parameters given\n");
198 explain_class();
199 return -1;
201 if (usc_ok && !fsc_ok) {
202 fprintf(stderr, "HFSC: Upper-limit Service Curve without "
203 "Link-Share Service Curve\n");
204 explain_class();
205 return -1;
208 tail = NLMSG_TAIL(n);
210 addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
211 if (rsc_ok)
212 addattr_l(n, 1024, TCA_HFSC_RSC, &rsc, sizeof(rsc));
213 if (fsc_ok)
214 addattr_l(n, 1024, TCA_HFSC_FSC, &fsc, sizeof(fsc));
215 if (usc_ok)
216 addattr_l(n, 1024, TCA_HFSC_USC, &usc, sizeof(usc));
218 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
219 return 0;
222 static void
223 hfsc_print_sc(FILE *f, char *name, struct tc_service_curve *sc)
225 SPRINT_BUF(b1);
227 fprintf(f, "%s ", name);
228 fprintf(f, "m1 %s ", sprint_rate(sc->m1, b1));
229 fprintf(f, "d %s ", sprint_usecs(sc->d, b1));
230 fprintf(f, "m2 %s ", sprint_rate(sc->m2, b1));
233 static int
234 hfsc_print_class_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
236 struct rtattr *tb[TCA_HFSC_MAX+1];
237 struct tc_service_curve *rsc = NULL, *fsc = NULL, *usc = NULL;
239 if (opt == NULL)
240 return 0;
242 parse_rtattr_nested(tb, TCA_HFSC_MAX, opt);
244 if (tb[TCA_HFSC_RSC]) {
245 if (RTA_PAYLOAD(tb[TCA_HFSC_RSC]) < sizeof(*rsc))
246 fprintf(stderr, "HFSC: truncated realtime option\n");
247 else
248 rsc = RTA_DATA(tb[TCA_HFSC_RSC]);
250 if (tb[TCA_HFSC_FSC]) {
251 if (RTA_PAYLOAD(tb[TCA_HFSC_FSC]) < sizeof(*fsc))
252 fprintf(stderr, "HFSC: truncated linkshare option\n");
253 else
254 fsc = RTA_DATA(tb[TCA_HFSC_FSC]);
256 if (tb[TCA_HFSC_USC]) {
257 if (RTA_PAYLOAD(tb[TCA_HFSC_USC]) < sizeof(*usc))
258 fprintf(stderr, "HFSC: truncated upperlimit option\n");
259 else
260 usc = RTA_DATA(tb[TCA_HFSC_USC]);
264 if (rsc != NULL && fsc != NULL &&
265 memcmp(rsc, fsc, sizeof(*rsc)) == 0)
266 hfsc_print_sc(f, "sc", rsc);
267 else {
268 if (rsc != NULL)
269 hfsc_print_sc(f, "rt", rsc);
270 if (fsc != NULL)
271 hfsc_print_sc(f, "ls", fsc);
273 if (usc != NULL)
274 hfsc_print_sc(f, "ul", usc);
276 return 0;
279 struct qdisc_util hfsc_qdisc_util = {
280 .id = "hfsc",
281 .parse_qopt = hfsc_parse_opt,
282 .print_qopt = hfsc_print_opt,
283 .print_xstats = hfsc_print_xstats,
284 .parse_copt = hfsc_parse_class_opt,
285 .print_copt = hfsc_print_class_opt,
288 static int
289 hfsc_get_sc1(int *argcp, char ***argvp, struct tc_service_curve *sc)
291 char **argv = *argvp;
292 int argc = *argcp;
293 unsigned int m1 = 0, d = 0, m2 = 0;
295 if (matches(*argv, "m1") == 0) {
296 NEXT_ARG();
297 if (get_rate(&m1, *argv) < 0) {
298 explain1("m1");
299 return -1;
301 NEXT_ARG();
304 if (matches(*argv, "d") == 0) {
305 NEXT_ARG();
306 if (get_usecs(&d, *argv) < 0) {
307 explain1("d");
308 return -1;
310 NEXT_ARG();
313 if (matches(*argv, "m2") == 0) {
314 NEXT_ARG();
315 if (get_rate(&m2, *argv) < 0) {
316 explain1("m2");
317 return -1;
319 } else
320 return -1;
322 sc->m1 = m1;
323 sc->d = d;
324 sc->m2 = m2;
326 *argvp = argv;
327 *argcp = argc;
328 return 0;
331 static int
332 hfsc_get_sc2(int *argcp, char ***argvp, struct tc_service_curve *sc)
334 char **argv = *argvp;
335 int argc = *argcp;
336 unsigned int umax = 0, dmax = 0, rate = 0;
338 if (matches(*argv, "umax") == 0) {
339 NEXT_ARG();
340 if (get_size(&umax, *argv) < 0) {
341 explain1("umax");
342 return -1;
344 NEXT_ARG();
347 if (matches(*argv, "dmax") == 0) {
348 NEXT_ARG();
349 if (get_usecs(&dmax, *argv) < 0) {
350 explain1("dmax");
351 return -1;
353 NEXT_ARG();
356 if (matches(*argv, "rate") == 0) {
357 NEXT_ARG();
358 if (get_rate(&rate, *argv) < 0) {
359 explain1("rate");
360 return -1;
362 } else
363 return -1;
365 if (umax != 0 && dmax == 0) {
366 fprintf(stderr, "HFSC: umax given but dmax is zero.\n");
367 return -1;
370 if (dmax != 0 && ceil(umax * 1000000.0 / dmax) > rate) {
372 * concave curve, slope of first segment is umax/dmax,
373 * intersection is at dmax
375 sc->m1 = ceil(umax * 1000000.0 / dmax); /* in bps */
376 sc->d = dmax;
377 sc->m2 = rate;
378 } else {
380 * convex curve, slope of first segment is 0, intersection
381 * is at dmax - umax / rate
383 sc->m1 = 0;
384 sc->d = ceil(dmax - umax * 1000000.0 / rate); /* in usec */
385 sc->m2 = rate;
388 *argvp = argv;
389 *argcp = argc;
390 return 0;
393 static int
394 hfsc_get_sc(int *argcp, char ***argvp, struct tc_service_curve *sc)
396 if (hfsc_get_sc1(argcp, argvp, sc) < 0 &&
397 hfsc_get_sc2(argcp, argvp, sc) < 0)
398 return -1;
400 if (sc->m1 == 0 && sc->m2 == 0) {
401 fprintf(stderr, "HFSC: Service Curve has two zero slopes\n");
402 return -1;
405 return 0;