1 /* $NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2001 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Emmanuel Dreyfus.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 #if 0
36 __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $");
37 #endif
38
39 #include <sys/param.h>
40 #include <sys/limits.h>
41 #include <sys/lock.h>
42 #include <sys/mutex.h>
43 #include <sys/proc.h>
44 #include <sys/resourcevar.h>
45 #include <sys/syscallsubr.h>
46 #include <sys/time.h>
47
48 #ifdef COMPAT_LINUX32
49 #include <machine/../linux32/linux.h>
50 #include <machine/../linux32/linux32_proto.h>
51 #else
52 #include <machine/../linux/linux.h>
53 #include <machine/../linux/linux_proto.h>
54 #endif
55
56 #include <compat/linux/linux_dtrace.h>
57 #include <compat/linux/linux_misc.h>
58 #include <compat/linux/linux_time.h>
59 #include <compat/linux/linux_util.h>
60
61 /* DTrace init */
62 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
63
64 /**
65 * DTrace probes in this module.
66 */
67 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unsupported_clockid,
68 "clockid_t");
69 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unknown_clockid,
70 "clockid_t");
71 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_gettime, conversion_error, "int");
72 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, gettime_error, "int");
73 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, copyout_error, "int");
74 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
75 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime64, gettime_error, "int");
76 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime64, copyout_error, "int");
77 #endif
78 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, conversion_error, "int");
79 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_settime, settime_error, "int");
80 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_settime, conversion_error, "int");
81 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, copyin_error, "int");
82 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
83 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime64, conversion_error, "int");
84 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime64, copyin_error, "int");
85 #endif
86 LIN_SDT_PROBE_DEFINE0(time, linux_common_clock_getres, nullcall);
87 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_getres, conversion_error, "int");
88 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_getres, getres_error, "int");
89 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, copyout_error, "int");
90 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
91 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres_time64, copyout_error, "int");
92 #endif
93 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyout_error, "int");
94 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyin_error, "int");
95 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyout_error, "int");
96 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyin_error, "int");
97 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_nanosleep, unsupported_flags, "int");
98 LIN_SDT_PROBE_DEFINE1(time, linux_common_clock_nanosleep, unsupported_clockid, "int");
99 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
100 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep_time64, copyout_error, "int");
101 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep_time64, copyin_error, "int");
102 #endif
103
104 static int linux_common_clock_gettime(struct thread *, clockid_t,
105 struct timespec *);
106 static int linux_common_clock_settime(struct thread *, clockid_t,
107 struct timespec *);
108 static int linux_common_clock_getres(struct thread *, clockid_t,
109 struct timespec *);
110 static int linux_common_clock_nanosleep(struct thread *, clockid_t,
111 l_int, struct timespec *, struct timespec *);
112
113 int
native_to_linux_timespec(struct l_timespec * ltp,struct timespec * ntp)114 native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
115 {
116
117 #ifdef COMPAT_LINUX32
118 if (ntp->tv_sec > INT_MAX || ntp->tv_sec < INT_MIN)
119 return (EOVERFLOW);
120 #endif
121 ltp->tv_sec = ntp->tv_sec;
122 ltp->tv_nsec = ntp->tv_nsec;
123
124 return (0);
125 }
126
127 int
linux_to_native_timespec(struct timespec * ntp,struct l_timespec * ltp)128 linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
129 {
130
131 if (!timespecvalid_interval(ltp))
132 return (EINVAL);
133 ntp->tv_sec = ltp->tv_sec;
134 ntp->tv_nsec = ltp->tv_nsec;
135
136 return (0);
137 }
138
139 int
linux_put_timespec(struct timespec * ntp,struct l_timespec * ltp)140 linux_put_timespec(struct timespec *ntp, struct l_timespec *ltp)
141 {
142 struct l_timespec lts;
143 int error;
144
145 error = native_to_linux_timespec(<s, ntp);
146 if (error != 0)
147 return (error);
148 return (copyout(<s, ltp, sizeof(lts)));
149 }
150
151 int
linux_get_timespec(struct timespec * ntp,const struct l_timespec * ultp)152 linux_get_timespec(struct timespec *ntp, const struct l_timespec *ultp)
153 {
154 struct l_timespec lts;
155 int error;
156
157 error = copyin(ultp, <s, sizeof(lts));
158 if (error != 0)
159 return (error);
160 return (linux_to_native_timespec(ntp, <s));
161 }
162
163 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
164 int
native_to_linux_timespec64(struct l_timespec64 * ltp64,struct timespec * ntp)165 native_to_linux_timespec64(struct l_timespec64 *ltp64, struct timespec *ntp)
166 {
167
168 ltp64->tv_sec = ntp->tv_sec;
169 ltp64->tv_nsec = ntp->tv_nsec;
170
171 return (0);
172 }
173
174 int
linux_to_native_timespec64(struct timespec * ntp,struct l_timespec64 * ltp64)175 linux_to_native_timespec64(struct timespec *ntp, struct l_timespec64 *ltp64)
176 {
177
178 #if defined(__i386__)
179 /* i386 time_t is still 32-bit */
180 if (ltp64->tv_sec > INT_MAX || ltp64->tv_sec < INT_MIN)
181 return (EOVERFLOW);
182 #endif
183 /* Zero out the padding in compat mode. */
184 ntp->tv_nsec = ltp64->tv_nsec & 0xFFFFFFFFUL;
185 ntp->tv_sec = ltp64->tv_sec;
186
187 if (!timespecvalid_interval(ntp))
188 return (EINVAL);
189
190 return (0);
191 }
192
193 int
linux_put_timespec64(struct timespec * ntp,struct l_timespec64 * ltp)194 linux_put_timespec64(struct timespec *ntp, struct l_timespec64 *ltp)
195 {
196 struct l_timespec64 lts;
197 int error;
198
199 error = native_to_linux_timespec64(<s, ntp);
200 if (error != 0)
201 return (error);
202 return (copyout(<s, ltp, sizeof(lts)));
203 }
204
205 int
linux_get_timespec64(struct timespec * ntp,const struct l_timespec64 * ultp)206 linux_get_timespec64(struct timespec *ntp, const struct l_timespec64 *ultp)
207 {
208 struct l_timespec64 lts;
209 int error;
210
211 error = copyin(ultp, <s, sizeof(lts));
212 if (error != 0)
213 return (error);
214 return (linux_to_native_timespec64(ntp, <s));
215 }
216 #endif
217
218 int
native_to_linux_itimerspec(struct l_itimerspec * ltp,struct itimerspec * ntp)219 native_to_linux_itimerspec(struct l_itimerspec *ltp, struct itimerspec *ntp)
220 {
221 int error;
222
223 error = native_to_linux_timespec(<p->it_interval, &ntp->it_interval);
224 if (error == 0)
225 error = native_to_linux_timespec(<p->it_value, &ntp->it_value);
226 return (error);
227 }
228
229 int
linux_to_native_itimerspec(struct itimerspec * ntp,struct l_itimerspec * ltp)230 linux_to_native_itimerspec(struct itimerspec *ntp, struct l_itimerspec *ltp)
231 {
232 int error;
233
234 error = linux_to_native_timespec(&ntp->it_interval, <p->it_interval);
235 if (error == 0)
236 error = linux_to_native_timespec(&ntp->it_value, <p->it_value);
237 return (error);
238 }
239
240 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
241 int
linux_to_native_itimerspec64(struct itimerspec * ntp,struct l_itimerspec64 * ltp)242 linux_to_native_itimerspec64(struct itimerspec *ntp, struct l_itimerspec64 *ltp)
243 {
244 int error;
245
246 error = linux_to_native_timespec64(&ntp->it_interval, <p->it_interval);
247 if (error == 0)
248 error = linux_to_native_timespec64(&ntp->it_value, <p->it_value);
249 return (error);
250 }
251
252 int
native_to_linux_itimerspec64(struct l_itimerspec64 * ltp,struct itimerspec * ntp)253 native_to_linux_itimerspec64(struct l_itimerspec64 *ltp, struct itimerspec *ntp)
254 {
255 int error;
256
257 error = native_to_linux_timespec64(<p->it_interval, &ntp->it_interval);
258 if (error == 0)
259 error = native_to_linux_timespec64(<p->it_value, &ntp->it_value);
260 return (error);
261 }
262 #endif
263
264 int
linux_to_native_clockid(clockid_t * n,clockid_t l)265 linux_to_native_clockid(clockid_t *n, clockid_t l)
266 {
267
268 if (l < 0) {
269 /* cpu-clock */
270 if (LINUX_CPUCLOCK_WHICH(l) == LINUX_CLOCKFD) {
271 LIN_SDT_PROBE1(time, linux_to_native_clockid,
272 unsupported_clockid, l);
273 return (ENOTSUP);
274 }
275 if ((l & LINUX_CLOCKFD_MASK) == LINUX_CLOCKFD_MASK)
276 return (EINVAL);
277
278 if (LINUX_CPUCLOCK_PERTHREAD(l))
279 *n = CLOCK_THREAD_CPUTIME_ID;
280 else
281 *n = CLOCK_PROCESS_CPUTIME_ID;
282 return (0);
283 }
284
285 switch (l) {
286 case LINUX_CLOCK_REALTIME:
287 *n = CLOCK_REALTIME;
288 break;
289 case LINUX_CLOCK_MONOTONIC:
290 *n = CLOCK_MONOTONIC;
291 break;
292 case LINUX_CLOCK_PROCESS_CPUTIME_ID:
293 *n = CLOCK_PROCESS_CPUTIME_ID;
294 break;
295 case LINUX_CLOCK_THREAD_CPUTIME_ID:
296 *n = CLOCK_THREAD_CPUTIME_ID;
297 break;
298 case LINUX_CLOCK_REALTIME_COARSE:
299 *n = CLOCK_REALTIME_FAST;
300 break;
301 case LINUX_CLOCK_MONOTONIC_COARSE:
302 case LINUX_CLOCK_MONOTONIC_RAW:
303 *n = CLOCK_MONOTONIC_FAST;
304 break;
305 case LINUX_CLOCK_BOOTTIME:
306 *n = CLOCK_UPTIME;
307 break;
308 case LINUX_CLOCK_REALTIME_ALARM:
309 case LINUX_CLOCK_BOOTTIME_ALARM:
310 case LINUX_CLOCK_SGI_CYCLE:
311 case LINUX_CLOCK_TAI:
312 LIN_SDT_PROBE1(time, linux_to_native_clockid,
313 unsupported_clockid, l);
314 return (ENOTSUP);
315 default:
316 LIN_SDT_PROBE1(time, linux_to_native_clockid,
317 unknown_clockid, l);
318 return (ENOTSUP);
319 }
320
321 return (0);
322 }
323
324 int
linux_to_native_timerflags(int * nflags,int flags)325 linux_to_native_timerflags(int *nflags, int flags)
326 {
327
328 if (flags & ~LINUX_TIMER_ABSTIME)
329 return (EINVAL);
330 *nflags = 0;
331 if (flags & LINUX_TIMER_ABSTIME)
332 *nflags |= TIMER_ABSTIME;
333 return (0);
334 }
335
336 static int
linux_common_clock_gettime(struct thread * td,clockid_t which,struct timespec * tp)337 linux_common_clock_gettime(struct thread *td, clockid_t which,
338 struct timespec *tp)
339 {
340 struct rusage ru;
341 struct thread *targettd;
342 struct proc *p;
343 int error, clockwhich;
344 clockid_t nwhich;
345 pid_t pid;
346 lwpid_t tid;
347
348 error = linux_to_native_clockid(&nwhich, which);
349 if (error != 0) {
350 linux_msg(curthread,
351 "unsupported clock_gettime clockid %d", which);
352 LIN_SDT_PROBE1(time, linux_common_clock_gettime,
353 conversion_error, error);
354 return (error);
355 }
356
357 switch (nwhich) {
358 case CLOCK_PROCESS_CPUTIME_ID:
359 if (which < 0) {
360 clockwhich = LINUX_CPUCLOCK_WHICH(which);
361 pid = LINUX_CPUCLOCK_ID(which);
362 } else {
363 clockwhich = LINUX_CPUCLOCK_SCHED;
364 pid = 0;
365 }
366 if (pid == 0) {
367 p = td->td_proc;
368 PROC_LOCK(p);
369 } else {
370 error = pget(pid, PGET_CANSEE, &p);
371 if (error != 0)
372 return (EINVAL);
373 }
374 switch (clockwhich) {
375 case LINUX_CPUCLOCK_PROF:
376 PROC_STATLOCK(p);
377 calcru(p, &ru.ru_utime, &ru.ru_stime);
378 PROC_STATUNLOCK(p);
379 PROC_UNLOCK(p);
380 timevaladd(&ru.ru_utime, &ru.ru_stime);
381 TIMEVAL_TO_TIMESPEC(&ru.ru_utime, tp);
382 break;
383 case LINUX_CPUCLOCK_VIRT:
384 PROC_STATLOCK(p);
385 calcru(p, &ru.ru_utime, &ru.ru_stime);
386 PROC_STATUNLOCK(p);
387 PROC_UNLOCK(p);
388 TIMEVAL_TO_TIMESPEC(&ru.ru_utime, tp);
389 break;
390 case LINUX_CPUCLOCK_SCHED:
391 kern_process_cputime(p, tp);
392 PROC_UNLOCK(p);
393 break;
394 default:
395 PROC_UNLOCK(p);
396 return (EINVAL);
397 }
398
399 break;
400
401 case CLOCK_THREAD_CPUTIME_ID:
402 if (which < 0) {
403 clockwhich = LINUX_CPUCLOCK_WHICH(which);
404 tid = LINUX_CPUCLOCK_ID(which);
405 } else {
406 clockwhich = LINUX_CPUCLOCK_SCHED;
407 tid = 0;
408 }
409 p = td->td_proc;
410 if (tid == 0) {
411 targettd = td;
412 PROC_LOCK(p);
413 } else {
414 targettd = linux_tdfind(td, tid, p->p_pid);
415 if (targettd == NULL)
416 return (EINVAL);
417 }
418 switch (clockwhich) {
419 case LINUX_CPUCLOCK_PROF:
420 PROC_STATLOCK(p);
421 thread_lock(targettd);
422 rufetchtd(targettd, &ru);
423 thread_unlock(targettd);
424 PROC_STATUNLOCK(p);
425 PROC_UNLOCK(p);
426 timevaladd(&ru.ru_utime, &ru.ru_stime);
427 TIMEVAL_TO_TIMESPEC(&ru.ru_utime, tp);
428 break;
429 case LINUX_CPUCLOCK_VIRT:
430 PROC_STATLOCK(p);
431 thread_lock(targettd);
432 rufetchtd(targettd, &ru);
433 thread_unlock(targettd);
434 PROC_STATUNLOCK(p);
435 PROC_UNLOCK(p);
436 TIMEVAL_TO_TIMESPEC(&ru.ru_utime, tp);
437 break;
438 case LINUX_CPUCLOCK_SCHED:
439 if (td == targettd)
440 targettd = NULL;
441 kern_thread_cputime(targettd, tp);
442 PROC_UNLOCK(p);
443 break;
444 default:
445 PROC_UNLOCK(p);
446 return (EINVAL);
447 }
448 break;
449
450 default:
451 error = kern_clock_gettime(td, nwhich, tp);
452 break;
453 }
454
455 return (error);
456 }
457
458 int
linux_clock_gettime(struct thread * td,struct linux_clock_gettime_args * args)459 linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
460 {
461 struct timespec tp;
462 int error;
463
464 error = linux_common_clock_gettime(td, args->which, &tp);
465 if (error != 0) {
466 LIN_SDT_PROBE1(time, linux_clock_gettime, gettime_error, error);
467 return (error);
468 }
469 error = linux_put_timespec(&tp, args->tp);
470 if (error != 0)
471 LIN_SDT_PROBE1(time, linux_clock_gettime, copyout_error, error);
472
473 return (error);
474 }
475
476 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
477 int
linux_clock_gettime64(struct thread * td,struct linux_clock_gettime64_args * args)478 linux_clock_gettime64(struct thread *td, struct linux_clock_gettime64_args *args)
479 {
480 struct timespec tp;
481 int error;
482
483 error = linux_common_clock_gettime(td, args->which, &tp);
484 if (error != 0) {
485 LIN_SDT_PROBE1(time, linux_clock_gettime64, gettime_error, error);
486 return (error);
487 }
488 error = linux_put_timespec64(&tp, args->tp);
489 if (error != 0)
490 LIN_SDT_PROBE1(time, linux_clock_gettime64, copyout_error, error);
491
492 return (error);
493 }
494 #endif
495
496 static int
linux_common_clock_settime(struct thread * td,clockid_t which,struct timespec * ts)497 linux_common_clock_settime(struct thread *td, clockid_t which,
498 struct timespec *ts)
499 {
500 int error;
501 clockid_t nwhich;
502
503 error = linux_to_native_clockid(&nwhich, which);
504 if (error != 0) {
505 linux_msg(curthread,
506 "unsupported clock_settime clockid %d", which);
507 LIN_SDT_PROBE1(time, linux_common_clock_settime, conversion_error,
508 error);
509 return (error);
510 }
511
512 error = kern_clock_settime(td, nwhich, ts);
513 if (error != 0)
514 LIN_SDT_PROBE1(time, linux_common_clock_settime,
515 settime_error, error);
516
517 return (error);
518 }
519
520 int
linux_clock_settime(struct thread * td,struct linux_clock_settime_args * args)521 linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
522 {
523 struct timespec ts;
524 int error;
525
526 error = linux_get_timespec(&ts, args->tp);
527 if (error != 0) {
528 LIN_SDT_PROBE1(time, linux_clock_settime, copyin_error, error);
529 return (error);
530 }
531 return (linux_common_clock_settime(td, args->which, &ts));
532 }
533
534 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
535 int
linux_clock_settime64(struct thread * td,struct linux_clock_settime64_args * args)536 linux_clock_settime64(struct thread *td, struct linux_clock_settime64_args *args)
537 {
538 struct timespec ts;
539 int error;
540
541 error = linux_get_timespec64(&ts, args->tp);
542 if (error != 0) {
543 LIN_SDT_PROBE1(time, linux_clock_settime64, copyin_error, error);
544 return (error);
545 }
546 return (linux_common_clock_settime(td, args->which, &ts));
547 }
548 #endif
549
550 static int
linux_common_clock_getres(struct thread * td,clockid_t which,struct timespec * ts)551 linux_common_clock_getres(struct thread *td, clockid_t which,
552 struct timespec *ts)
553 {
554 struct proc *p;
555 int error, clockwhich;
556 clockid_t nwhich;
557 pid_t pid;
558 lwpid_t tid;
559
560 error = linux_to_native_clockid(&nwhich, which);
561 if (error != 0) {
562 linux_msg(curthread,
563 "unsupported clock_getres clockid %d", which);
564 LIN_SDT_PROBE1(time, linux_common_clock_getres,
565 conversion_error, error);
566 return (error);
567 }
568
569 /*
570 * Check user supplied clock id in case of per-process
571 * or thread-specific cpu-time clock.
572 */
573 if (which < 0) {
574 switch (nwhich) {
575 case CLOCK_THREAD_CPUTIME_ID:
576 tid = LINUX_CPUCLOCK_ID(which);
577 if (tid != 0) {
578 p = td->td_proc;
579 if (linux_tdfind(td, tid, p->p_pid) == NULL)
580 return (EINVAL);
581 PROC_UNLOCK(p);
582 }
583 break;
584 case CLOCK_PROCESS_CPUTIME_ID:
585 pid = LINUX_CPUCLOCK_ID(which);
586 if (pid != 0) {
587 error = pget(pid, PGET_CANSEE, &p);
588 if (error != 0)
589 return (EINVAL);
590 PROC_UNLOCK(p);
591 }
592 break;
593 }
594 }
595
596 if (ts == NULL) {
597 LIN_SDT_PROBE0(time, linux_common_clock_getres, nullcall);
598 return (0);
599 }
600
601 switch (nwhich) {
602 case CLOCK_THREAD_CPUTIME_ID:
603 case CLOCK_PROCESS_CPUTIME_ID:
604 clockwhich = LINUX_CPUCLOCK_WHICH(which);
605 /*
606 * In both cases (when the clock id obtained by a call to
607 * clock_getcpuclockid() or using the clock
608 * ID CLOCK_PROCESS_CPUTIME_ID Linux hardcodes precision
609 * of clock. The same for the CLOCK_THREAD_CPUTIME_ID clock.
610 *
611 * See Linux posix_cpu_clock_getres() implementation.
612 */
613 if (which > 0 || clockwhich == LINUX_CPUCLOCK_SCHED) {
614 ts->tv_sec = 0;
615 ts->tv_nsec = 1;
616 goto out;
617 }
618
619 switch (clockwhich) {
620 case LINUX_CPUCLOCK_PROF:
621 nwhich = CLOCK_PROF;
622 break;
623 case LINUX_CPUCLOCK_VIRT:
624 nwhich = CLOCK_VIRTUAL;
625 break;
626 default:
627 return (EINVAL);
628 }
629 break;
630
631 default:
632 break;
633 }
634 error = kern_clock_getres(td, nwhich, ts);
635 if (error != 0) {
636 LIN_SDT_PROBE1(time, linux_common_clock_getres,
637 getres_error, error);
638 return (error);
639 }
640
641 out:
642 return (error);
643 }
644
645 int
linux_clock_getres(struct thread * td,struct linux_clock_getres_args * args)646 linux_clock_getres(struct thread *td,
647 struct linux_clock_getres_args *args)
648 {
649 struct timespec ts;
650 int error;
651
652 error = linux_common_clock_getres(td, args->which, &ts);
653 if (error != 0 || args->tp == NULL)
654 return (error);
655 error = linux_put_timespec(&ts, args->tp);
656 if (error != 0)
657 LIN_SDT_PROBE1(time, linux_clock_getres,
658 copyout_error, error);
659 return (error);
660 }
661
662 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
663 int
linux_clock_getres_time64(struct thread * td,struct linux_clock_getres_time64_args * args)664 linux_clock_getres_time64(struct thread *td,
665 struct linux_clock_getres_time64_args *args)
666 {
667 struct timespec ts;
668 int error;
669
670 error = linux_common_clock_getres(td, args->which, &ts);
671 if (error != 0 || args->tp == NULL)
672 return (error);
673 error = linux_put_timespec64(&ts, args->tp);
674 if (error != 0)
675 LIN_SDT_PROBE1(time, linux_clock_getres_time64,
676 copyout_error, error);
677 return (error);
678 }
679 #endif
680
681 int
linux_nanosleep(struct thread * td,struct linux_nanosleep_args * args)682 linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
683 {
684 struct timespec *rmtp;
685 struct timespec rqts, rmts;
686 int error, error2;
687
688 error = linux_get_timespec(&rqts, args->rqtp);
689 if (error != 0) {
690 LIN_SDT_PROBE1(time, linux_nanosleep, copyin_error, error);
691 return (error);
692 }
693 if (args->rmtp != NULL)
694 rmtp = &rmts;
695 else
696 rmtp = NULL;
697
698 error = kern_nanosleep(td, &rqts, rmtp);
699 if (error == EINTR && args->rmtp != NULL) {
700 error2 = linux_put_timespec(rmtp, args->rmtp);
701 if (error2 != 0) {
702 LIN_SDT_PROBE1(time, linux_nanosleep, copyout_error,
703 error2);
704 return (error2);
705 }
706 }
707
708 return (error);
709 }
710
711 static int
linux_common_clock_nanosleep(struct thread * td,clockid_t which,l_int lflags,struct timespec * rqtp,struct timespec * rmtp)712 linux_common_clock_nanosleep(struct thread *td, clockid_t which,
713 l_int lflags, struct timespec *rqtp, struct timespec *rmtp)
714 {
715 int error, flags;
716 clockid_t clockid;
717
718 error = linux_to_native_timerflags(&flags, lflags);
719 if (error != 0) {
720 LIN_SDT_PROBE1(time, linux_common_clock_nanosleep,
721 unsupported_flags, lflags);
722 return (error);
723 }
724
725 error = linux_to_native_clockid(&clockid, which);
726 if (error != 0) {
727 linux_msg(curthread,
728 "unsupported clock_nanosleep clockid %d", which);
729 LIN_SDT_PROBE1(time, linux_common_clock_nanosleep,
730 unsupported_clockid, which);
731 return (error);
732 }
733 if (clockid == CLOCK_THREAD_CPUTIME_ID)
734 return (ENOTSUP);
735
736 return (kern_clock_nanosleep(td, clockid, flags, rqtp, rmtp));
737 }
738
739 int
linux_clock_nanosleep(struct thread * td,struct linux_clock_nanosleep_args * args)740 linux_clock_nanosleep(struct thread *td,
741 struct linux_clock_nanosleep_args *args)
742 {
743 struct timespec *rmtp;
744 struct timespec rqts, rmts;
745 int error, error2;
746
747 error = linux_get_timespec(&rqts, args->rqtp);
748 if (error != 0) {
749 LIN_SDT_PROBE1(time, linux_clock_nanosleep, copyin_error,
750 error);
751 return (error);
752 }
753 if (args->rmtp != NULL)
754 rmtp = &rmts;
755 else
756 rmtp = NULL;
757
758 error = linux_common_clock_nanosleep(td, args->which, args->flags,
759 &rqts, rmtp);
760 if (error == EINTR && (args->flags & LINUX_TIMER_ABSTIME) == 0 &&
761 args->rmtp != NULL) {
762 error2 = linux_put_timespec(rmtp, args->rmtp);
763 if (error2 != 0) {
764 LIN_SDT_PROBE1(time, linux_clock_nanosleep,
765 copyout_error, error2);
766 return (error2);
767 }
768 }
769 return (error);
770 }
771
772 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
773 int
linux_clock_nanosleep_time64(struct thread * td,struct linux_clock_nanosleep_time64_args * args)774 linux_clock_nanosleep_time64(struct thread *td,
775 struct linux_clock_nanosleep_time64_args *args)
776 {
777 struct timespec *rmtp;
778 struct timespec rqts, rmts;
779 int error, error2;
780
781 error = linux_get_timespec64(&rqts, args->rqtp);
782 if (error != 0) {
783 LIN_SDT_PROBE1(time, linux_clock_nanosleep_time64,
784 copyin_error, error);
785 return (error);
786 }
787 if (args->rmtp != NULL)
788 rmtp = &rmts;
789 else
790 rmtp = NULL;
791
792 error = linux_common_clock_nanosleep(td, args->which, args->flags,
793 &rqts, rmtp);
794 if (error == EINTR && (args->flags & LINUX_TIMER_ABSTIME) == 0 &&
795 args->rmtp != NULL) {
796 error2 = linux_put_timespec64(rmtp, args->rmtp);
797 if (error2 != 0) {
798 LIN_SDT_PROBE1(time, linux_clock_nanosleep_time64,
799 copyout_error, error2);
800 return (error2);
801 }
802 }
803 return (error);
804 }
805 #endif
806