Annotation of src/usr.bin/vmstat/dkstats.c, Revision 1.36
1.36 ! miod 1: /* $OpenBSD: dkstats.c,v 1.35 2010/09/24 00:11:15 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: dkstats.c,v 1.1 1996/05/10 23:19:27 thorpej Exp $ */
1.1 tholo 3:
4: /*
1.2 deraadt 5: * Copyright (c) 1996 John M. Vinopal
1.1 tholo 6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed for the NetBSD Project
19: * by John M. Vinopal.
20: * 4. The name of the author may not be used to endorse or promote products
21: * derived from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
28: * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30: * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
1.10 angelos 36: #include <sys/param.h>
1.1 tholo 37: #include <sys/time.h>
38: #include <sys/disk.h>
1.36 ! miod 39: #include <sys/sched.h>
1.10 angelos 40: #include <sys/sysctl.h>
41: #include <sys/tty.h>
1.1 tholo 42:
43: #include <err.h>
44: #include <fcntl.h>
45: #include <kvm.h>
46: #include <limits.h>
47: #include <nlist.h>
48: #include <stdio.h>
49: #include <stdlib.h>
50: #include <string.h>
51: #include <unistd.h>
52: #include "dkstats.h"
53:
1.16 deraadt 54: #if !defined(NOKVM)
1.1 tholo 55: static struct nlist namelist[] = {
1.18 deraadt 56: #define X_TK_NIN 0 /* sysctl */
57: { "_tk_nin" },
58: #define X_TK_NOUT 1 /* sysctl */
59: { "_tk_nout" },
60: #define X_CP_TIME 2 /* sysctl */
61: { "_cp_time" },
62: #define X_HZ 3 /* sysctl */
63: { "_hz" },
64: #define X_STATHZ 4 /* sysctl */
1.1 tholo 65: { "_stathz" },
1.18 deraadt 66: #define X_DISK_COUNT 5 /* sysctl */
67: { "_disk_count" },
68: #define X_DISKLIST 6 /* sysctl */
69: { "_disklist" },
1.1 tholo 70: { NULL },
71: };
1.16 deraadt 72: #define KVM_ERROR(_string) { \
73: warnx("%s", (_string)); \
74: errx(1, "%s", kvm_geterr(kd)); \
75: }
76:
77: /*
1.30 deraadt 78: * Dereference the namelist pointer `v' and fill in the local copy
1.16 deraadt 79: * 'p' which is of size 's'.
80: */
81: #define deref_nl(v, p, s) deref_kptr((void *)namelist[(v)].n_value, (p), (s));
82: static void deref_kptr(void *, void *, size_t);
83: #endif /* !defined(NOKVM) */
1.1 tholo 84:
85: /* Structures to hold the statistics. */
86: struct _disk cur, last;
87:
88: /* Kernel pointers: nlistf and memf defined in calling program. */
1.19 deraadt 89: #if !defined(NOKVM)
1.20 deraadt 90: extern kvm_t *kd;
1.19 deraadt 91: #endif
1.1 tholo 92: extern char *nlistf;
93: extern char *memf;
94:
1.19 deraadt 95: #if !defined(NOKVM)
1.1 tholo 96: /* Pointer to list of disks. */
97: static struct disk *dk_drivehead = NULL;
1.19 deraadt 98: #endif
1.1 tholo 99:
100: /* Backward compatibility references. */
1.30 deraadt 101: int dk_ndrive = 0;
1.1 tholo 102: int *dk_select;
103: char **dr_name;
104:
105: /* Missing from <sys/time.h> */
1.16 deraadt 106: #define timerset(tvp, uvp) \
107: ((uvp)->tv_sec = (tvp)->tv_sec); \
108: ((uvp)->tv_usec = (tvp)->tv_usec)
109:
110: #define SWAP(fld) tmp = cur.fld; \
111: cur.fld -= last.fld; \
112: last.fld = tmp
1.1 tholo 113:
114: /*
115: * Take the delta between the present values and the last recorded
116: * values, storing the present values in the 'last' structure, and
117: * the delta values in the 'cur' structure.
118: */
119: void
1.21 deraadt 120: dkswap(void)
1.1 tholo 121: {
122: u_int64_t tmp;
123: int i;
124:
1.22 tdeval 125: for (i = 0; i < cur.dk_ndrive; i++) {
1.1 tholo 126: struct timeval tmp_timer;
127:
128: if (!cur.dk_select[i])
129: continue;
130:
131: /* Delta Values. */
1.24 tedu 132: SWAP(dk_rxfer[i]);
133: SWAP(dk_wxfer[i]);
1.1 tholo 134: SWAP(dk_seek[i]);
1.24 tedu 135: SWAP(dk_rbytes[i]);
136: SWAP(dk_wbytes[i]);
1.1 tholo 137:
138: /* Delta Time. */
139: timerclear(&tmp_timer);
140: timerset(&(cur.dk_time[i]), &tmp_timer);
141: timersub(&tmp_timer, &(last.dk_time[i]), &(cur.dk_time[i]));
142: timerclear(&(last.dk_time[i]));
143: timerset(&tmp_timer, &(last.dk_time[i]));
144: }
145: for (i = 0; i < CPUSTATES; i++) {
1.29 deraadt 146: long ltmp;
147:
148: ltmp = cur.cp_time[i];
149: cur.cp_time[i] -= last.cp_time[i];
150: last.cp_time[i] = ltmp;
1.1 tholo 151: }
152: SWAP(tk_nin);
153: SWAP(tk_nout);
154:
155: #undef SWAP
156: }
157:
158: /*
1.30 deraadt 159: * Read the disk statistics for each disk in the disk list.
1.1 tholo 160: * Also collect statistics for tty i/o and cpu ticks.
161: */
162: void
1.21 deraadt 163: dkreadstats(void)
1.1 tholo 164: {
1.19 deraadt 165: #if !defined(NOKVM)
1.1 tholo 166: struct disk cur_disk, *p;
1.19 deraadt 167: #endif
1.22 tdeval 168: int i, j, mib[3];
1.10 angelos 169: size_t size;
1.22 tdeval 170: char *disknames, *name, *bufpp, **dk_name;
1.13 angelos 171: struct diskstats *q;
1.1 tholo 172:
1.22 tdeval 173: last.dk_ndrive = cur.dk_ndrive;
174:
1.10 angelos 175: if (nlistf == NULL && memf == NULL) {
1.22 tdeval 176: /* Get the number of attached drives. */
177: mib[0] = CTL_HW;
178: mib[1] = HW_DISKCOUNT;
179: size = sizeof(dk_ndrive);
180: if (sysctl(mib, 2, &dk_ndrive, &size, NULL, 0) < 0 ) {
181: warn("could not read hw.diskcount");
182: dk_ndrive = 0;
183: }
184:
185: if (cur.dk_ndrive != dk_ndrive) {
186: /* Re-read the disk names. */
1.29 deraadt 187: dk_name = calloc((size_t)dk_ndrive, sizeof(char *));
1.22 tdeval 188: if (dk_name == NULL)
189: err(1, NULL);
190: mib[0] = CTL_HW;
191: mib[1] = HW_DISKNAMES;
192: size = 0;
193: if (sysctl(mib, 2, NULL, &size, NULL, 0) < 0)
194: err(1, "can't get hw.disknames");
195: disknames = malloc(size);
196: if (disknames == NULL)
197: err(1, NULL);
198: if (sysctl(mib, 2, disknames, &size, NULL, 0) < 0)
199: err(1, "can't get hw.disknames");
200: bufpp = disknames;
1.35 deraadt 201: for (i = 0; i < dk_ndrive &&
202: (name = strsep(&bufpp, ",")) != NULL; i++)
1.23 millert 203: dk_name[i] = name;
1.35 deraadt 204: for (i = 0; i < dk_ndrive; i++) {
205: char *p = strchr(dk_name[i], ':');
206: if (p)
207: *p = '\0';
208: }
1.22 tdeval 209: disknames = cur.dk_name[0]; /* To free old names. */
210:
211: if (dk_ndrive < cur.dk_ndrive) {
212: for (i = 0, j = 0; i < dk_ndrive; i++, j++) {
213: while (j < cur.dk_ndrive &&
214: strcmp(cur.dk_name[j], dk_name[i]))
215: j++;
216: if (i == j) continue;
217:
218: if (j >= cur.dk_ndrive) {
219: cur.dk_select[i] = 1;
1.24 tedu 220: last.dk_rxfer[i] = 0;
221: last.dk_wxfer[i] = 0;
1.22 tdeval 222: last.dk_seek[i] = 0;
1.24 tedu 223: last.dk_rbytes[i] = 0;
224: last.dk_wbytes[i] = 0;
1.22 tdeval 225: bzero(&last.dk_time[i],
226: sizeof(struct timeval));
227: continue;
228: }
229:
230: cur.dk_select[i] = cur.dk_select[j];
1.24 tedu 231: last.dk_rxfer[i] = last.dk_rxfer[j];
232: last.dk_wxfer[i] = last.dk_wxfer[j];
1.22 tdeval 233: last.dk_seek[i] = last.dk_seek[j];
1.24 tedu 234: last.dk_rbytes[i] = last.dk_rbytes[j];
235: last.dk_wbytes[i] = last.dk_wbytes[j];
1.22 tdeval 236: last.dk_time[i] = last.dk_time[j];
237: }
238:
239: cur.dk_select = realloc(cur.dk_select,
240: dk_ndrive * sizeof(*cur.dk_select));
1.24 tedu 241: cur.dk_rxfer = realloc(cur.dk_rxfer,
242: dk_ndrive * sizeof(*cur.dk_rxfer));
243: cur.dk_wxfer = realloc(cur.dk_wxfer,
244: dk_ndrive * sizeof(*cur.dk_wxfer));
1.22 tdeval 245: cur.dk_seek = realloc(cur.dk_seek,
246: dk_ndrive * sizeof(*cur.dk_seek));
1.24 tedu 247: cur.dk_rbytes = realloc(cur.dk_rbytes,
248: dk_ndrive * sizeof(*cur.dk_rbytes));
249: cur.dk_wbytes = realloc(cur.dk_wbytes,
250: dk_ndrive * sizeof(*cur.dk_wbytes));
1.22 tdeval 251: cur.dk_time = realloc(cur.dk_time,
252: dk_ndrive * sizeof(*cur.dk_time));
1.24 tedu 253: last.dk_rxfer = realloc(last.dk_rxfer,
254: dk_ndrive * sizeof(*last.dk_rxfer));
1.25 millert 255: last.dk_wxfer = realloc(last.dk_wxfer,
256: dk_ndrive * sizeof(*last.dk_wxfer));
1.22 tdeval 257: last.dk_seek = realloc(last.dk_seek,
258: dk_ndrive * sizeof(*last.dk_seek));
1.24 tedu 259: last.dk_rbytes = realloc(last.dk_rbytes,
260: dk_ndrive * sizeof(*last.dk_rbytes));
261: last.dk_wbytes = realloc(last.dk_wbytes,
262: dk_ndrive * sizeof(*last.dk_wbytes));
1.22 tdeval 263: last.dk_time = realloc(last.dk_time,
264: dk_ndrive * sizeof(*last.dk_time));
1.32 chl 265:
266: if (!cur.dk_select || !cur.dk_rxfer ||
267: !cur.dk_wxfer || !cur.dk_seek ||
268: !cur.dk_rbytes || !cur.dk_wbytes ||
269: !cur.dk_time || !last.dk_rxfer ||
270: !last.dk_wxfer || !last.dk_seek ||
271: !last.dk_rbytes || !last.dk_wbytes ||
272: !last.dk_time)
273: errx(1, "Memory allocation failure.");
1.22 tdeval 274: } else {
275: cur.dk_select = realloc(cur.dk_select,
276: dk_ndrive * sizeof(*cur.dk_select));
1.24 tedu 277: cur.dk_rxfer = realloc(cur.dk_rxfer,
278: dk_ndrive * sizeof(*cur.dk_rxfer));
279: cur.dk_wxfer = realloc(cur.dk_wxfer,
280: dk_ndrive * sizeof(*cur.dk_wxfer));
1.22 tdeval 281: cur.dk_seek = realloc(cur.dk_seek,
282: dk_ndrive * sizeof(*cur.dk_seek));
1.24 tedu 283: cur.dk_rbytes = realloc(cur.dk_rbytes,
284: dk_ndrive * sizeof(*cur.dk_rbytes));
285: cur.dk_wbytes = realloc(cur.dk_wbytes,
286: dk_ndrive * sizeof(*cur.dk_wbytes));
1.22 tdeval 287: cur.dk_time = realloc(cur.dk_time,
288: dk_ndrive * sizeof(*cur.dk_time));
1.24 tedu 289: last.dk_rxfer = realloc(last.dk_rxfer,
290: dk_ndrive * sizeof(*last.dk_rxfer));
291: last.dk_wxfer = realloc(last.dk_wxfer,
292: dk_ndrive * sizeof(*last.dk_wxfer));
1.22 tdeval 293: last.dk_seek = realloc(last.dk_seek,
294: dk_ndrive * sizeof(*last.dk_seek));
1.24 tedu 295: last.dk_rbytes = realloc(last.dk_rbytes,
296: dk_ndrive * sizeof(*last.dk_rbytes));
297: last.dk_wbytes = realloc(last.dk_wbytes,
298: dk_ndrive * sizeof(*last.dk_wbytes));
1.22 tdeval 299: last.dk_time = realloc(last.dk_time,
300: dk_ndrive * sizeof(*last.dk_time));
1.32 chl 301:
302: if (!cur.dk_select || !cur.dk_rxfer ||
303: !cur.dk_wxfer || !cur.dk_seek ||
304: !cur.dk_rbytes || !cur.dk_wbytes ||
305: !cur.dk_time || !last.dk_rxfer ||
306: !last.dk_wxfer || !last.dk_seek ||
307: !last.dk_rbytes || !last.dk_wbytes ||
308: !last.dk_time)
309: errx(1, "Memory allocation failure.");
1.22 tdeval 310:
311: for (i = dk_ndrive - 1, j = cur.dk_ndrive - 1;
312: i >= 0; i--) {
313:
314: if (j < 0 ||
315: strcmp(cur.dk_name[j], dk_name[i]))
316: {
317: cur.dk_select[i] = 1;
1.24 tedu 318: last.dk_rxfer[i] = 0;
319: last.dk_wxfer[i] = 0;
1.22 tdeval 320: last.dk_seek[i] = 0;
1.24 tedu 321: last.dk_rbytes[i] = 0;
322: last.dk_wbytes[i] = 0;
1.22 tdeval 323: bzero(&last.dk_time[i],
324: sizeof(struct timeval));
325: continue;
326: }
327:
328: if (i > j) {
329: cur.dk_select[i] =
330: cur.dk_select[j];
1.24 tedu 331: last.dk_rxfer[i] =
332: last.dk_rxfer[j];
333: last.dk_wxfer[i] =
334: last.dk_wxfer[j];
1.22 tdeval 335: last.dk_seek[i] =
336: last.dk_seek[j];
1.24 tedu 337: last.dk_rbytes[i] =
338: last.dk_rbytes[j];
339: last.dk_wbytes[i] =
340: last.dk_wbytes[j];
1.22 tdeval 341: last.dk_time[i] =
342: last.dk_time[j];
343: }
344: j--;
345: }
346: }
347:
348: cur.dk_ndrive = dk_ndrive;
349: free(disknames);
350: cur.dk_name = dk_name;
351: dr_name = cur.dk_name;
352: dk_select = cur.dk_select;
353: }
354:
355: size = cur.dk_ndrive * sizeof(struct diskstats);
1.10 angelos 356: mib[0] = CTL_HW;
357: mib[1] = HW_DISKSTATS;
1.13 angelos 358: q = malloc(size);
359: if (q == NULL)
1.10 angelos 360: err(1, NULL);
1.13 angelos 361: if (sysctl(mib, 2, q, &size, NULL, 0) < 0) {
1.22 tdeval 362: #ifdef DEBUG
1.10 angelos 363: warn("could not read hw.diskstats");
1.22 tdeval 364: #endif /* DEBUG */
365: bzero(q, cur.dk_ndrive * sizeof(struct diskstats));
1.10 angelos 366: }
367:
1.22 tdeval 368: for (i = 0; i < cur.dk_ndrive; i++) {
1.24 tedu 369: cur.dk_rxfer[i] = q[i].ds_rxfer;
370: cur.dk_wxfer[i] = q[i].ds_wxfer;
1.13 angelos 371: cur.dk_seek[i] = q[i].ds_seek;
1.24 tedu 372: cur.dk_rbytes[i] = q[i].ds_rbytes;
373: cur.dk_wbytes[i] = q[i].ds_wbytes;
1.13 angelos 374: timerset(&(q[i].ds_time), &(cur.dk_time[i]));
1.10 angelos 375: }
1.14 deraadt 376: free(q);
1.10 angelos 377:
1.30 deraadt 378: size = sizeof(cur.cp_time);
1.10 angelos 379: mib[0] = CTL_KERN;
380: mib[1] = KERN_CPTIME;
381: if (sysctl(mib, 2, cur.cp_time, &size, NULL, 0) < 0) {
1.11 angelos 382: warn("could not read kern.cp_time");
1.10 angelos 383: bzero(cur.cp_time, sizeof(cur.cp_time));
384: }
385: size = sizeof(cur.tk_nin);
386: mib[0] = CTL_KERN;
387: mib[1] = KERN_TTY;
388: mib[2] = KERN_TTY_TKNIN;
389: if (sysctl(mib, 3, &cur.tk_nin, &size, NULL, 0) < 0) {
1.11 angelos 390: warn("could not read kern.tty.tk_nin");
1.10 angelos 391: cur.tk_nin = 0;
392: }
393: size = sizeof(cur.tk_nin);
394: mib[0] = CTL_KERN;
395: mib[1] = KERN_TTY;
396: mib[2] = KERN_TTY_TKNOUT;
397: if (sysctl(mib, 3, &cur.tk_nout, &size, NULL, 0) < 0) {
1.11 angelos 398: warn("could not read kern.tty.tk_nout");
1.10 angelos 399: cur.tk_nout = 0;
400: }
401: } else {
1.16 deraadt 402: #if !defined(NOKVM)
1.10 angelos 403: p = dk_drivehead;
404:
1.22 tdeval 405: for (i = 0; i < cur.dk_ndrive; i++) {
1.10 angelos 406: deref_kptr(p, &cur_disk, sizeof(cur_disk));
1.24 tedu 407: cur.dk_rxfer[i] = cur_disk.dk_rxfer;
408: cur.dk_wxfer[i] = cur_disk.dk_wxfer;
1.10 angelos 409: cur.dk_seek[i] = cur_disk.dk_seek;
1.24 tedu 410: cur.dk_rbytes[i] = cur_disk.dk_rbytes;
411: cur.dk_wbytes[i] = cur_disk.dk_wbytes;
1.10 angelos 412: timerset(&(cur_disk.dk_time), &(cur.dk_time[i]));
1.27 otto 413: p = TAILQ_NEXT(&cur_disk, dk_link);
1.10 angelos 414: }
415: deref_nl(X_CP_TIME, cur.cp_time, sizeof(cur.cp_time));
416: deref_nl(X_TK_NIN, &cur.tk_nin, sizeof(cur.tk_nin));
417: deref_nl(X_TK_NOUT, &cur.tk_nout, sizeof(cur.tk_nout));
1.16 deraadt 418: #endif /* !defined(NOKVM) */
1.1 tholo 419: }
420: }
421:
422: /*
423: * Perform all of the initialization and memory allocation needed to
424: * track disk statistics.
425: */
426: int
1.28 otto 427: dkinit(int sel)
1.1 tholo 428: {
1.19 deraadt 429: #if !defined(NOKVM)
1.1 tholo 430: struct disklist_head disk_head;
431: struct disk cur_disk, *p;
432: char errbuf[_POSIX2_LINE_MAX];
1.19 deraadt 433: #endif
1.1 tholo 434: static int once = 0;
435: extern int hz;
1.10 angelos 436: int i, mib[2];
437: size_t size;
438: struct clockinfo clkinfo;
439: char *disknames, *name, *bufpp;
1.1 tholo 440:
441: if (once)
442: return(1);
443:
1.10 angelos 444: if (nlistf != NULL || memf != NULL) {
1.16 deraadt 445: #if !defined(NOKVM)
1.10 angelos 446: /* Open the kernel. */
1.20 deraadt 447: if (kd == NULL &&
448: (kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
1.10 angelos 449: errbuf)) == NULL)
450: errx(1, "kvm_openfiles: %s", errbuf);
451:
452: /* Obtain the namelist symbols from the kernel. */
453: if (kvm_nlist(kd, namelist))
454: KVM_ERROR("kvm_nlist failed to read symbols.");
455:
456: /* Get the number of attached drives. */
1.22 tdeval 457: deref_nl(X_DISK_COUNT, &cur.dk_ndrive, sizeof(cur.dk_ndrive));
1.10 angelos 458:
1.22 tdeval 459: if (cur.dk_ndrive < 0)
460: errx(1, "invalid _disk_count %d.", cur.dk_ndrive);
1.10 angelos 461:
1.1 tholo 462: /* Get a pointer to the first disk. */
463: deref_nl(X_DISKLIST, &disk_head, sizeof(disk_head));
1.27 otto 464: dk_drivehead = TAILQ_FIRST(&disk_head);
1.10 angelos 465:
466: /* Get ticks per second. */
467: deref_nl(X_STATHZ, &hz, sizeof(hz));
468: if (!hz)
469: deref_nl(X_HZ, &hz, sizeof(hz));
1.16 deraadt 470: #endif /* !defined(NOKVM) */
1.10 angelos 471: } else {
472: /* Get the number of attached drives. */
473: mib[0] = CTL_HW;
474: mib[1] = HW_DISKCOUNT;
1.22 tdeval 475: size = sizeof(cur.dk_ndrive);
476: if (sysctl(mib, 2, &cur.dk_ndrive, &size, NULL, 0) < 0 ) {
1.11 angelos 477: warn("could not read hw.diskcount");
1.22 tdeval 478: cur.dk_ndrive = 0;
1.10 angelos 479: }
480:
481: /* Get ticks per second. */
482: mib[0] = CTL_KERN;
483: mib[1] = KERN_CLOCKRATE;
484: size = sizeof(clkinfo);
485: if (sysctl(mib, 2, &clkinfo, &size, NULL, 0) < 0) {
1.11 angelos 486: warn("could not read kern.clockrate");
1.10 angelos 487: hz = 0;
488: } else
489: hz = clkinfo.stathz;
1.1 tholo 490: }
491:
492: /* allocate space for the statistics */
1.29 deraadt 493: cur.dk_time = calloc((size_t)cur.dk_ndrive, sizeof(struct timeval));
494: cur.dk_rxfer = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
495: cur.dk_wxfer = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
496: cur.dk_seek = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
497: cur.dk_rbytes = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
498: cur.dk_wbytes = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
1.31 chl 499: cur.dk_select = calloc((size_t)cur.dk_ndrive, sizeof(int));
500: cur.dk_name = calloc((size_t)cur.dk_ndrive, sizeof(char *));
1.29 deraadt 501: last.dk_time = calloc((size_t)cur.dk_ndrive, sizeof(struct timeval));
502: last.dk_rxfer = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
503: last.dk_wxfer = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
504: last.dk_seek = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
505: last.dk_rbytes = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
506: last.dk_wbytes = calloc((size_t)cur.dk_ndrive, sizeof(u_int64_t));
1.30 deraadt 507:
1.24 tedu 508: if (!cur.dk_time || !cur.dk_rxfer || !cur.dk_wxfer || !cur.dk_seek ||
1.31 chl 509: !cur.dk_rbytes || !cur.dk_wbytes || !cur.dk_select ||
510: !cur.dk_name || !last.dk_time || !last.dk_rxfer ||
511: !last.dk_wxfer || !last.dk_seek || !last.dk_rbytes ||
512: !last.dk_wbytes)
1.1 tholo 513: errx(1, "Memory allocation failure.");
514:
515: /* Set up the compatibility interfaces. */
1.22 tdeval 516: dk_ndrive = cur.dk_ndrive;
1.1 tholo 517: dk_select = cur.dk_select;
518: dr_name = cur.dk_name;
519:
1.22 tdeval 520: /* Read the disk names and set initial selection. */
1.10 angelos 521: if (nlistf == NULL && memf == NULL) {
522: mib[0] = CTL_HW;
523: mib[1] = HW_DISKNAMES;
524: size = 0;
525: if (sysctl(mib, 2, NULL, &size, NULL, 0) < 0)
526: err(1, "can't get hw.disknames");
1.12 angelos 527: disknames = malloc(size);
1.10 angelos 528: if (disknames == NULL)
529: err(1, NULL);
530: if (sysctl(mib, 2, disknames, &size, NULL, 0) < 0)
531: err(1, "can't get hw.disknames");
532: bufpp = disknames;
1.23 millert 533: for (i = 0; i < dk_ndrive && (name = strsep(&bufpp, ",")) != NULL; i++) {
534: cur.dk_name[i] = name;
1.28 otto 535: cur.dk_select[i] = sel;
1.35 deraadt 536: }
537: for (i = 0; i < dk_ndrive; i++) {
538: char *p = strchr(cur.dk_name[i], ':');
539: if (p)
540: *p = '\0';
1.10 angelos 541: }
542: } else {
1.16 deraadt 543: #if !defined(NOKVM)
1.10 angelos 544: p = dk_drivehead;
1.22 tdeval 545: for (i = 0; i < cur.dk_ndrive; i++) {
1.10 angelos 546: char buf[10];
1.16 deraadt 547:
1.10 angelos 548: deref_kptr(p, &cur_disk, sizeof(cur_disk));
549: deref_kptr(cur_disk.dk_name, buf, sizeof(buf));
550: cur.dk_name[i] = strdup(buf);
551: if (!cur.dk_name[i])
552: errx(1, "Memory allocation failure.");
1.28 otto 553: cur.dk_select[i] = sel;
1.1 tholo 554:
1.27 otto 555: p = TAILQ_NEXT(&cur_disk, dk_link);
1.10 angelos 556: }
1.16 deraadt 557: #endif /* !defined(NOKVM) */
1.1 tholo 558: }
559:
1.33 martynas 560: /* Never do this initialization again. */
1.1 tholo 561: once = 1;
562: return(1);
563: }
564:
1.16 deraadt 565: #if !defined(NOKVM)
1.1 tholo 566: /*
1.30 deraadt 567: * Dereference the kernel pointer `kptr' and fill in the local copy
1.1 tholo 568: * pointed to by `ptr'. The storage space must be pre-allocated,
569: * and the size of the copy passed in `len'.
570: */
571: static void
1.21 deraadt 572: deref_kptr(void *kptr, void *ptr, size_t len)
1.1 tholo 573: {
574: char buf[128];
575:
1.6 art 576: if (kvm_read(kd, (u_long)kptr, ptr, len) != len) {
1.1 tholo 577: bzero(buf, sizeof(buf));
578: snprintf(buf, (sizeof(buf) - 1),
1.2 deraadt 579: "can't dereference kptr 0x%lx", (u_long)kptr);
1.1 tholo 580: KVM_ERROR(buf);
581: }
582: }
1.17 drahn 583: #endif /* !defined(NOKVM) */
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