1 /*	$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $ */
2 
3 /*-
4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Emmanuel Dreyfus.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_time.c 315658 2017-03-21 01:24:56Z vangyzen $");
34 #if 0
35 __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $");
36 #endif
37 
38 #include "opt_compat.h"
39 #include "opt_kdtrace.h"
40 
41 #include <sys/param.h>
42 #include <sys/kernel.h>
43 #include <sys/lock.h>
44 #include <sys/ucred.h>
45 #include <sys/mount.h>
46 #include <sys/mutex.h>
47 #include <sys/resourcevar.h>
48 #include <sys/sdt.h>
49 #include <sys/signal.h>
50 #include <sys/stdint.h>
51 #include <sys/syscallsubr.h>
52 #include <sys/sysproto.h>
53 #include <sys/time.h>
54 #include <sys/systm.h>
55 #include <sys/proc.h>
56 
57 #ifdef COMPAT_LINUX32
58 #include <machine/../linux32/linux.h>
59 #include <machine/../linux32/linux32_proto.h>
60 #else
61 #include <machine/../linux/linux.h>
62 #include <machine/../linux/linux_proto.h>
63 #endif
64 
65 #include <compat/linux/linux_dtrace.h>
66 #include <compat/linux/linux_timer.h>
67 
68 /* DTrace init */
69 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
70 
71 /**
72  * DTrace probes in this module.
73  */
74 LIN_SDT_PROBE_DEFINE2(time, native_to_linux_timespec, entry,
75     "struct l_timespec *", "struct timespec *");
76 LIN_SDT_PROBE_DEFINE0(time, native_to_linux_timespec, return);
77 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_timespec, entry,
78     "struct timespec *", "struct l_timespec *");
79 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_timespec, return, "int");
80 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_clockid, entry, "clockid_t *",
81     "clockid_t");
82 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unsupported_clockid,
83     "clockid_t");
84 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unknown_clockid,
85     "clockid_t");
86 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, return, "int");
87 LIN_SDT_PROBE_DEFINE2(time, linux_clock_gettime, entry, "clockid_t",
88     "struct l_timespec *");
89 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, conversion_error, "int");
90 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, gettime_error, "int");
91 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, copyout_error, "int");
92 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, return, "int");
93 LIN_SDT_PROBE_DEFINE2(time, linux_clock_settime, entry, "clockid_t",
94     "struct l_timespec *");
95 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, conversion_error, "int");
96 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, settime_error, "int");
97 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, copyin_error, "int");
98 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, return, "int");
99 LIN_SDT_PROBE_DEFINE2(time, linux_clock_getres, entry, "clockid_t",
100     "struct l_timespec *");
101 LIN_SDT_PROBE_DEFINE0(time, linux_clock_getres, nullcall);
102 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, conversion_error, "int");
103 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, getres_error, "int");
104 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, copyout_error, "int");
105 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, return, "int");
106 LIN_SDT_PROBE_DEFINE2(time, linux_nanosleep, entry, "const struct l_timespec *",
107     "struct l_timespec *");
108 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, conversion_error, "int");
109 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyout_error, "int");
110 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyin_error, "int");
111 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, return, "int");
112 LIN_SDT_PROBE_DEFINE4(time, linux_clock_nanosleep, entry, "clockid_t", "int",
113     "struct l_timespec *", "struct l_timespec *");
114 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, conversion_error, "int");
115 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyout_error, "int");
116 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyin_error, "int");
117 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_flags, "int");
118 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_clockid, "int");
119 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, return, "int");
120 
121 
122 void
native_to_linux_timespec(struct l_timespec * ltp,struct timespec * ntp)123 native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
124 {
125 
126 	LIN_SDT_PROBE2(time, native_to_linux_timespec, entry, ltp, ntp);
127 
128 	ltp->tv_sec = ntp->tv_sec;
129 	ltp->tv_nsec = ntp->tv_nsec;
130 
131 	LIN_SDT_PROBE0(time, native_to_linux_timespec, return);
132 }
133 
134 int
linux_to_native_timespec(struct timespec * ntp,struct l_timespec * ltp)135 linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
136 {
137 
138 	LIN_SDT_PROBE2(time, linux_to_native_timespec, entry, ntp, ltp);
139 
140 	if (ltp->tv_sec < 0 || ltp->tv_nsec > (l_long)999999999L) {
141 		LIN_SDT_PROBE1(time, linux_to_native_timespec, return, EINVAL);
142 		return (EINVAL);
143 	}
144 	ntp->tv_sec = ltp->tv_sec;
145 	ntp->tv_nsec = ltp->tv_nsec;
146 
147 	LIN_SDT_PROBE1(time, linux_to_native_timespec, return, 0);
148 	return (0);
149 }
150 
151 int
linux_to_native_clockid(clockid_t * n,clockid_t l)152 linux_to_native_clockid(clockid_t *n, clockid_t l)
153 {
154 
155 	LIN_SDT_PROBE2(time, linux_to_native_clockid, entry, n, l);
156 
157 	if (l < 0) {
158 		/* cpu-clock */
159 		if ((l & LINUX_CLOCKFD_MASK) == LINUX_CLOCKFD)
160 			return (EINVAL);
161 		if (LINUX_CPUCLOCK_WHICH(l) >= LINUX_CPUCLOCK_MAX)
162 			return (EINVAL);
163 
164 		if (LINUX_CPUCLOCK_PERTHREAD(l))
165 			*n = CLOCK_THREAD_CPUTIME_ID;
166 		else
167 			*n = CLOCK_PROCESS_CPUTIME_ID;
168 		return (0);
169 	}
170 
171 	switch (l) {
172 	case LINUX_CLOCK_REALTIME:
173 		*n = CLOCK_REALTIME;
174 		break;
175 	case LINUX_CLOCK_MONOTONIC:
176 		*n = CLOCK_MONOTONIC;
177 		break;
178 	case LINUX_CLOCK_REALTIME_COARSE:
179 		*n = CLOCK_REALTIME_FAST;
180 		break;
181 	case LINUX_CLOCK_MONOTONIC_COARSE:
182 		*n = CLOCK_MONOTONIC_FAST;
183 		break;
184 	case LINUX_CLOCK_MONOTONIC_RAW:
185 	case LINUX_CLOCK_BOOTTIME:
186 	case LINUX_CLOCK_REALTIME_ALARM:
187 	case LINUX_CLOCK_BOOTTIME_ALARM:
188 	case LINUX_CLOCK_SGI_CYCLE:
189 	case LINUX_CLOCK_TAI:
190 		LIN_SDT_PROBE1(time, linux_to_native_clockid,
191 		    unsupported_clockid, l);
192 		LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
193 		return (EINVAL);
194 	default:
195 		LIN_SDT_PROBE1(time, linux_to_native_clockid,
196 		    unknown_clockid, l);
197 		LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
198 		return (EINVAL);
199 	}
200 
201 	LIN_SDT_PROBE1(time, linux_to_native_clockid, return, 0);
202 	return (0);
203 }
204 
205 int
linux_clock_gettime(struct thread * td,struct linux_clock_gettime_args * args)206 linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
207 {
208 	struct l_timespec lts;
209 	struct timespec tp;
210 	struct rusage ru;
211 	struct thread *targettd;
212 	struct proc *p;
213 	int error, clockwhich;
214 	clockid_t nwhich = 0;	/* XXX: GCC */
215 	pid_t pid;
216 	lwpid_t tid;
217 
218 	LIN_SDT_PROBE2(time, linux_clock_gettime, entry, args->which, args->tp);
219 
220 	error = linux_to_native_clockid(&nwhich, args->which);
221 	if (error != 0) {
222 		LIN_SDT_PROBE1(time, linux_clock_gettime, conversion_error,
223 		    error);
224 		LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
225 		return (error);
226 	}
227 
228 	switch (nwhich) {
229 	case CLOCK_PROCESS_CPUTIME_ID:
230 		clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
231 		pid = LINUX_CPUCLOCK_ID(args->which);
232 		if (pid == 0) {
233 			p = td->td_proc;
234 			PROC_LOCK(p);
235 		} else {
236 			error = pget(pid, PGET_CANSEE, &p);
237 			if (error != 0)
238 				return (EINVAL);
239 		}
240 		switch (clockwhich) {
241 		case LINUX_CPUCLOCK_PROF:
242 			PROC_STATLOCK(p);
243 			calcru(p, &ru.ru_utime, &ru.ru_stime);
244 			PROC_STATUNLOCK(p);
245 			PROC_UNLOCK(p);
246 			timevaladd(&ru.ru_utime, &ru.ru_stime);
247 			TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
248 			break;
249 		case LINUX_CPUCLOCK_VIRT:
250 			PROC_STATLOCK(p);
251 			calcru(p, &ru.ru_utime, &ru.ru_stime);
252 			PROC_STATUNLOCK(p);
253 			PROC_UNLOCK(p);
254 			TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
255 			break;
256 		case LINUX_CPUCLOCK_SCHED:
257 			PROC_UNLOCK(p);
258 			error = kern_clock_getcpuclockid2(td, pid,
259 			    CPUCLOCK_WHICH_PID, &nwhich);
260 			if (error != 0)
261 				return (EINVAL);
262 			error = kern_clock_gettime(td, nwhich, &tp);
263 			break;
264 		default:
265 			PROC_UNLOCK(p);
266 			return (EINVAL);
267 		}
268 
269 		break;
270 
271 	case CLOCK_THREAD_CPUTIME_ID:
272 		clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
273 		p = td->td_proc;
274 		tid = LINUX_CPUCLOCK_ID(args->which);
275 		if (tid == 0) {
276 			targettd = td;
277 			PROC_LOCK(p);
278 		} else {
279 			targettd = tdfind(tid, p->p_pid);
280 			if (targettd == NULL)
281 				return (EINVAL);
282 		}
283 		switch (clockwhich) {
284 		case LINUX_CPUCLOCK_PROF:
285 			PROC_STATLOCK(p);
286 			thread_lock(targettd);
287 			rufetchtd(targettd, &ru);
288 			thread_unlock(targettd);
289 			PROC_STATUNLOCK(p);
290 			PROC_UNLOCK(p);
291 			timevaladd(&ru.ru_utime, &ru.ru_stime);
292 			TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
293 			break;
294 		case LINUX_CPUCLOCK_VIRT:
295 			PROC_STATLOCK(p);
296 			thread_lock(targettd);
297 			rufetchtd(targettd, &ru);
298 			thread_unlock(targettd);
299 			PROC_STATUNLOCK(p);
300 			PROC_UNLOCK(p);
301 			TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
302 			break;
303 		case LINUX_CPUCLOCK_SCHED:
304 			error = kern_clock_getcpuclockid2(td, tid,
305 			    CPUCLOCK_WHICH_TID, &nwhich);
306 			PROC_UNLOCK(p);
307 			if (error != 0)
308 				return (EINVAL);
309 			error = kern_clock_gettime(td, nwhich, &tp);
310 			break;
311 		default:
312 			PROC_UNLOCK(p);
313 			return (EINVAL);
314 		}
315 		break;
316 
317 	default:
318 		error = kern_clock_gettime(td, nwhich, &tp);
319 		break;
320 	}
321 	if (error != 0) {
322 		LIN_SDT_PROBE1(time, linux_clock_gettime, gettime_error, error);
323 		LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
324 		return (error);
325 	}
326 	native_to_linux_timespec(&lts, &tp);
327 
328 	error = copyout(&lts, args->tp, sizeof lts);
329 	if (error != 0)
330 		LIN_SDT_PROBE1(time, linux_clock_gettime, copyout_error, error);
331 
332 	LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
333 	return (error);
334 }
335 
336 int
linux_clock_settime(struct thread * td,struct linux_clock_settime_args * args)337 linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
338 {
339 	struct timespec ts;
340 	struct l_timespec lts;
341 	int error;
342 	clockid_t nwhich = 0;	/* XXX: GCC */
343 
344 	LIN_SDT_PROBE2(time, linux_clock_settime, entry, args->which, args->tp);
345 
346 	error = linux_to_native_clockid(&nwhich, args->which);
347 	if (error != 0) {
348 		LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
349 		    error);
350 		LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
351 		return (error);
352 	}
353 	error = copyin(args->tp, &lts, sizeof lts);
354 	if (error != 0) {
355 		LIN_SDT_PROBE1(time, linux_clock_settime, copyin_error, error);
356 		LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
357 		return (error);
358 	}
359 	error = linux_to_native_timespec(&ts, &lts);
360 	if (error != 0) {
361 		LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
362 		    error);
363 		LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
364 		return (error);
365 	}
366 
367 	error = kern_clock_settime(td, nwhich, &ts);
368 	if (error != 0)
369 		LIN_SDT_PROBE1(time, linux_clock_settime, settime_error, error);
370 
371 	LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
372 	return (error);
373 }
374 
375 int
linux_clock_getres(struct thread * td,struct linux_clock_getres_args * args)376 linux_clock_getres(struct thread *td, struct linux_clock_getres_args *args)
377 {
378 	struct proc *p;
379 	struct timespec ts;
380 	struct l_timespec lts;
381 	int error, clockwhich;
382 	clockid_t nwhich = 0;	/* XXX: GCC */
383 	pid_t pid;
384 	lwpid_t tid;
385 
386 	LIN_SDT_PROBE2(time, linux_clock_getres, entry, args->which, args->tp);
387 
388 	error = linux_to_native_clockid(&nwhich, args->which);
389 	if (error != 0) {
390 		LIN_SDT_PROBE1(time, linux_clock_getres, conversion_error,
391 		    error);
392 		LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
393 		return (error);
394 	}
395 
396 	/*
397 	 * Check user supplied clock id in case of per-process
398 	 * or thread-specific cpu-time clock.
399 	 */
400 	switch (nwhich) {
401 	case CLOCK_THREAD_CPUTIME_ID:
402 		tid = LINUX_CPUCLOCK_ID(args->which);
403 		if (tid != 0) {
404 			p = td->td_proc;
405 			if (tdfind(tid, p->p_pid) == NULL)
406 				return (ESRCH);
407 			PROC_UNLOCK(p);
408 		}
409 		break;
410 	case CLOCK_PROCESS_CPUTIME_ID:
411 		pid = LINUX_CPUCLOCK_ID(args->which);
412 		if (pid != 0) {
413 			error = pget(pid, PGET_CANSEE, &p);
414 			if (error != 0)
415 				return (EINVAL);
416 			PROC_UNLOCK(p);
417 		}
418 		break;
419 	}
420 
421 	if (args->tp == NULL) {
422 		LIN_SDT_PROBE0(time, linux_clock_getres, nullcall);
423 		LIN_SDT_PROBE1(time, linux_clock_getres, return, 0);
424 	  	return (0);
425 	}
426 
427 	switch (nwhich) {
428 	case CLOCK_THREAD_CPUTIME_ID:
429 	case CLOCK_PROCESS_CPUTIME_ID:
430 		clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
431 		switch (clockwhich) {
432 		case LINUX_CPUCLOCK_PROF:
433 			nwhich = CLOCK_PROF;
434 			break;
435 		case LINUX_CPUCLOCK_VIRT:
436 			nwhich = CLOCK_VIRTUAL;
437 			break;
438 		case LINUX_CPUCLOCK_SCHED:
439 			break;
440 		default:
441 			return (EINVAL);
442 		}
443 		break;
444 
445 	default:
446 		break;
447 	}
448 	error = kern_clock_getres(td, nwhich, &ts);
449 	if (error != 0) {
450 		LIN_SDT_PROBE1(time, linux_clock_getres, getres_error, error);
451 		LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
452 		return (error);
453 	}
454 	native_to_linux_timespec(&lts, &ts);
455 
456 	error = copyout(&lts, args->tp, sizeof lts);
457 	if (error != 0)
458 		LIN_SDT_PROBE1(time, linux_clock_getres, copyout_error, error);
459 
460 	LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
461 	return (error);
462 }
463 
464 int
linux_nanosleep(struct thread * td,struct linux_nanosleep_args * args)465 linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
466 {
467 	struct timespec *rmtp;
468 	struct l_timespec lrqts, lrmts;
469 	struct timespec rqts, rmts;
470 	int error, error2;
471 
472 	LIN_SDT_PROBE2(time, linux_nanosleep, entry, args->rqtp, args->rmtp);
473 
474 	error = copyin(args->rqtp, &lrqts, sizeof lrqts);
475 	if (error != 0) {
476 		LIN_SDT_PROBE1(time, linux_nanosleep, copyin_error, error);
477 		LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
478 		return (error);
479 	}
480 
481 	if (args->rmtp != NULL)
482 		rmtp = &rmts;
483 	else
484 		rmtp = NULL;
485 
486 	error = linux_to_native_timespec(&rqts, &lrqts);
487 	if (error != 0) {
488 		LIN_SDT_PROBE1(time, linux_nanosleep, conversion_error, error);
489 		LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
490 		return (error);
491 	}
492 	error = kern_nanosleep(td, &rqts, rmtp);
493 	if (error == EINTR && args->rmtp != NULL) {
494 		native_to_linux_timespec(&lrmts, rmtp);
495 		error2 = copyout(&lrmts, args->rmtp, sizeof(lrmts));
496 		if (error2 != 0) {
497 			LIN_SDT_PROBE1(time, linux_nanosleep, copyout_error,
498 			    error2);
499 			LIN_SDT_PROBE1(time, linux_nanosleep, return, error2);
500 			return (error2);
501 		}
502 	}
503 
504 	LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
505 	return (error);
506 }
507 
508 int
linux_clock_nanosleep(struct thread * td,struct linux_clock_nanosleep_args * args)509 linux_clock_nanosleep(struct thread *td, struct linux_clock_nanosleep_args *args)
510 {
511 	struct timespec *rmtp;
512 	struct l_timespec lrqts, lrmts;
513 	struct timespec rqts, rmts;
514 	int error, error2;
515 
516 	LIN_SDT_PROBE4(time, linux_clock_nanosleep, entry, args->which,
517 	    args->flags, args->rqtp, args->rmtp);
518 
519 	if (args->flags != 0) {
520 		/* XXX deal with TIMER_ABSTIME */
521 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_flags,
522 		    args->flags);
523 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
524 		return (EINVAL);	/* XXX deal with TIMER_ABSTIME */
525 	}
526 
527 	if (args->which != LINUX_CLOCK_REALTIME) {
528 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_clockid,
529 		    args->which);
530 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
531 		return (EINVAL);
532 	}
533 
534 	error = copyin(args->rqtp, &lrqts, sizeof(lrqts));
535 	if (error != 0) {
536 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, copyin_error,
537 		    error);
538 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
539 		return (error);
540 	}
541 
542 	if (args->rmtp != NULL)
543 		rmtp = &rmts;
544 	else
545 		rmtp = NULL;
546 
547 	error = linux_to_native_timespec(&rqts, &lrqts);
548 	if (error != 0) {
549 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, conversion_error,
550 		    error);
551 		LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
552 		return (error);
553 	}
554 	error = kern_nanosleep(td, &rqts, rmtp);
555 	if (error == EINTR && args->rmtp != NULL) {
556 		/* XXX. Not for TIMER_ABSTIME */
557 	   	native_to_linux_timespec(&lrmts, rmtp);
558 		error2 = copyout(&lrmts, args->rmtp, sizeof(lrmts));
559 		if (error2 != 0) {
560 			LIN_SDT_PROBE1(time, linux_clock_nanosleep,
561 			    copyout_error, error2);
562 			LIN_SDT_PROBE1(time, linux_clock_nanosleep,
563 			    return, error2);
564 			return (error2);
565 		}
566 	}
567 
568 	LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
569 	return (error);
570 }
571