1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <unistd.h>
36 #include <sys/types.h>
37 #include <sys/priocntl.h>
38 #include <sys/fxpriocntl.h>
39 #include <sys/param.h>
40 #include <errno.h>
41 #include <sys/fx.h>
42
43 #include "dispadmin.h"
44
45 /*
46 * This file contains the class specific code implementing
47 * the fixed-priority dispadmin sub-command.
48 */
49
50 #define BASENMSZ 16
51
52 extern char *basename();
53
54 static void get_fxdptbl(), set_fxdptbl();
55
56 static char usage[] = "usage: dispadmin -l\n"
57 "dispadmin -c FX -g [-r res]\n"
58 "dispadmin -c FX -s infile\n";
59
60 static char basenm[BASENMSZ];
61 static char cmdpath[256];
62
63
64 int
main(int argc,char ** argv)65 main(int argc, char **argv)
66 {
67 int c;
68 int lflag, gflag, rflag, sflag;
69 ulong_t res;
70 char *infile;
71 char *endp;
72
73 (void) strcpy(cmdpath, argv[0]);
74 (void) strcpy(basenm, basename(argv[0]));
75 lflag = gflag = rflag = sflag = 0;
76 while ((c = getopt(argc, argv, "lc:gr:s:")) != -1) {
77 switch (c) {
78
79 case 'l':
80 lflag++;
81 break;
82
83 case 'c':
84 if (strcmp(optarg, "FX") != 0)
85 fatalerr("error: %s executed for %s class, "
86 "%s is actually sub-command for FX class\n",
87 cmdpath, optarg, cmdpath);
88 break;
89
90 case 'g':
91 gflag++;
92 break;
93
94 case 'r':
95 rflag++;
96 errno = 0;
97 res = strtoul(optarg, &endp, 10);
98 if (res == 0 || errno != 0 || *endp != '\0')
99 fatalerr("%s: Can't convert to requested "
100 "resolution\n", basenm);
101 break;
102
103 case 's':
104 sflag++;
105 infile = optarg;
106 break;
107
108 case '?':
109 fatalerr(usage);
110
111 default:
112 break;
113 }
114 }
115
116
117 if (lflag) {
118 if (gflag || rflag || sflag)
119 fatalerr(usage);
120
121 (void) printf("FX\t(Fixed Priority)\n");
122 return (0);
123
124 } else if (gflag) {
125 if (sflag)
126 fatalerr(usage);
127
128 if (rflag == 0)
129 res = 1000;
130
131 get_fxdptbl(res);
132 return (0);
133
134 } else if (sflag) {
135 if (rflag)
136 fatalerr(usage);
137
138 set_fxdptbl(infile);
139 return (0);
140
141 } else {
142 fatalerr(usage);
143 }
144 return (1);
145 }
146
147
148 /*
149 * Retrieve the current fx_dptbl from memory, convert the time quantum
150 * values to the resolution specified by res and write the table to stdout.
151 */
152 static void
get_fxdptbl(ulong_t res)153 get_fxdptbl(ulong_t res)
154 {
155 int i;
156 int fxdpsz;
157 pcinfo_t pcinfo;
158 pcadmin_t pcadmin;
159 fxadmin_t fxadmin;
160 fxdpent_t *fx_dptbl;
161 hrtimer_t hrtime;
162
163 (void) strcpy(pcinfo.pc_clname, "FX");
164 if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) == -1)
165 fatalerr("%s: Can't get FX class ID, priocntl system call "
166 "failed with errno %d\n", basenm, errno);
167
168 pcadmin.pc_cid = pcinfo.pc_cid;
169 pcadmin.pc_cladmin = (char *)&fxadmin;
170 fxadmin.fx_cmd = FX_GETDPSIZE;
171
172 if (priocntl(0, 0, PC_ADMIN, (caddr_t)&pcadmin) == -1)
173 fatalerr("%s: Can't get fx_dptbl size, priocntl system call "
174 "failed with errno %d\n", basenm, errno);
175
176 fxdpsz = fxadmin.fx_ndpents * sizeof (fxdpent_t);
177 if ((fx_dptbl = (fxdpent_t *)malloc(fxdpsz)) == NULL)
178 fatalerr("%s: Can't allocate memory for fx_dptbl\n", basenm);
179
180 fxadmin.fx_dpents = fx_dptbl;
181
182 fxadmin.fx_cmd = FX_GETDPTBL;
183 if (priocntl(0, 0, PC_ADMIN, (caddr_t)&pcadmin) == -1)
184 fatalerr("%s: Can't get fx_dptbl, priocntl system call "
185 "failed with errno %d\n", basenm, errno);
186
187 (void) printf("# Fixed Priority Dispatcher Configuration\n");
188 (void) printf("RES=%ld\n\n", res);
189 (void) printf("# TIME QUANTUM PRIORITY\n");
190 (void) printf("# (fx_quantum) LEVEL\n");
191
192 for (i = 0; i < fxadmin.fx_ndpents; i++) {
193 if (res != HZ && fx_dptbl[i].fx_quantum != FX_TQINF) {
194 hrtime.hrt_secs = 0;
195 hrtime.hrt_rem = fx_dptbl[i].fx_quantum;
196 hrtime.hrt_res = HZ;
197 if (_hrtnewres(&hrtime, res, HRT_RNDUP) == -1)
198 fatalerr("%s: Can't convert to requested "
199 "resolution\n", basenm);
200 if ((fx_dptbl[i].fx_quantum = hrtconvert(&hrtime))
201 == -1)
202 fatalerr("%s: Can't express time quantum in "
203 "requested resolution,\n"
204 "try coarser resolution\n", basenm);
205 }
206 (void) printf("%10d # %3d\n",
207 fx_dptbl[i].fx_quantum, i);
208 }
209 }
210
211
212 /*
213 * Read the fx_dptbl values from infile, convert the time quantum values
214 * to HZ resolution, do a little sanity checking and overwrite the table
215 * in memory with the values from the file.
216 */
217 static void
set_fxdptbl(char * infile)218 set_fxdptbl(char *infile)
219 {
220 int i;
221 int nfxdpents;
222 char *tokp;
223 pcinfo_t pcinfo;
224 pcadmin_t pcadmin;
225 fxadmin_t fxadmin;
226 fxdpent_t *fx_dptbl;
227 int linenum;
228 ulong_t res;
229 hrtimer_t hrtime;
230 FILE *fp;
231 char buf[512];
232 int wslength;
233 char *endp;
234 char name[512], value[512];
235 int len;
236
237 (void) strcpy(pcinfo.pc_clname, "FX");
238 if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) == -1)
239 fatalerr("%s: Can't get FX class ID, priocntl system call "
240 "failed with errno %d\n", basenm, errno);
241
242 pcadmin.pc_cid = pcinfo.pc_cid;
243 pcadmin.pc_cladmin = (char *)&fxadmin;
244 fxadmin.fx_cmd = FX_GETDPSIZE;
245
246 if (priocntl(0, 0, PC_ADMIN, (caddr_t)&pcadmin) == -1)
247 fatalerr("%s: Can't get fx_dptbl size, priocntl system call "
248 "failed with errno %d\n", basenm, errno);
249
250 nfxdpents = fxadmin.fx_ndpents;
251 if ((fx_dptbl =
252 (fxdpent_t *)malloc(nfxdpents * sizeof (fxdpent_t))) == NULL)
253 fatalerr("%s: Can't allocate memory for fx_dptbl\n", basenm);
254
255 if ((fp = fopen(infile, "r")) == NULL)
256 fatalerr("%s: Can't open %s for input\n", basenm, infile);
257
258 linenum = 0;
259
260 /*
261 * Find the first non-blank, non-comment line. A comment line
262 * is any line with '#' as the first non-white-space character.
263 */
264 do {
265 if (fgets(buf, sizeof (buf), fp) == NULL)
266 fatalerr("%s: Too few lines in input table\n", basenm);
267 linenum++;
268 } while (buf[0] == '#' || buf[0] == '\0' ||
269 (wslength = strspn(buf, " \t\n")) == strlen(buf) ||
270 strchr(buf, '#') == buf + wslength);
271
272 /* LINTED - unbounded string specifier */
273 if (sscanf(buf, " %[^=]=%s \n%n", name, value, &len) == 2 &&
274 name[0] != '\0' && value[0] != '\0' && len == strlen(buf)) {
275
276 if (strcmp(name, "RES") == 0) {
277 errno = 0;
278 i = (int)strtol(value, &endp, 10);
279 if (errno != 0 || endp == value ||
280 i < 0 || *endp != '\0')
281 fatalerr("%s: Bad RES specification, "
282 "line %d of input file\n", basenm, linenum);
283 else
284 res = i;
285 } else {
286 fatalerr("%s: Bad RES specification, "
287 "line %d of input file\n", basenm, linenum);
288 }
289 }
290
291 /*
292 * The remainder of the input file should contain exactly enough
293 * non-blank, non-comment lines to fill the table (fx_ndpents lines).
294 * We assume that any non-blank, non-comment line is data for the
295 * table and fail if we find more or less than we need.
296 */
297 for (i = 0; i < fxadmin.fx_ndpents; i++) {
298
299 /*
300 * Get the next non-blank, non-comment line.
301 */
302 do {
303 if (fgets(buf, sizeof (buf), fp) == NULL)
304 fatalerr("%s: Too few lines in input table\n",
305 basenm);
306 linenum++;
307 } while (buf[0] == '#' || buf[0] == '\0' ||
308 (wslength = strspn(buf, " \t\n")) == strlen(buf) ||
309 strchr(buf, '#') == buf + wslength);
310
311 if ((tokp = strtok(buf, " \t")) == NULL)
312 fatalerr("%s: Too few values, line %d of input file\n",
313 basenm, linenum);
314
315 fx_dptbl[i].fx_quantum = atol(tokp);
316 if (fx_dptbl[i].fx_quantum <= 0) {
317 fatalerr("%s: fx_quantum value out of "
318 "valid range; line %d of input,\n"
319 "table not overwritten\n", basenm, linenum);
320 } else if (res != HZ) {
321 hrtime.hrt_secs = 0;
322 hrtime.hrt_rem = fx_dptbl[i].fx_quantum;
323 hrtime.hrt_res = res;
324 if (_hrtnewres(&hrtime, HZ, HRT_RNDUP) == -1)
325 fatalerr("%s: Can't convert specified "
326 "resolution to ticks\n", basenm);
327 if ((fx_dptbl[i].fx_quantum =
328 hrtconvert(&hrtime)) == -1)
329 fatalerr("%s: fx_quantum value out of "
330 "valid range; line %d of input,\n"
331 "table not overwritten\n", basenm, linenum);
332 }
333
334 if ((tokp = strtok(NULL, " \t")) != NULL && tokp[0] != '#')
335 fatalerr("%s: Too many values, line %d of input file\n",
336 basenm, linenum);
337 }
338
339 /*
340 * We've read enough lines to fill the table. We fail
341 * if the input file contains any more.
342 */
343 while (fgets(buf, sizeof (buf), fp) != NULL) {
344 if (buf[0] != '#' && buf[0] != '\0' &&
345 (wslength = strspn(buf, " \t\n")) != strlen(buf) &&
346 strchr(buf, '#') != buf + wslength)
347 fatalerr("%s: Too many lines in input table\n",
348 basenm);
349 }
350
351 fxadmin.fx_dpents = fx_dptbl;
352 fxadmin.fx_cmd = FX_SETDPTBL;
353 if (priocntl(0, 0, PC_ADMIN, (caddr_t)&pcadmin) == -1)
354 fatalerr("%s: Can't set fx_dptbl, priocntl system call failed "
355 "with errno %d\n", basenm, errno);
356 }
357