1 /*-
2 * Copyright (c) 2002 Doug Rabson
3 * Copyright (c) 1994-1995 Søren Schmidt
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include "opt_compat.h"
34 #include "opt_mac.h"
35
36 #include <sys/param.h>
37 #include <sys/blist.h>
38 #include <sys/fcntl.h>
39 #if defined(__i386__)
40 #include <sys/imgact_aout.h>
41 #endif
42 #include <sys/jail.h>
43 #include <sys/kernel.h>
44 #include <sys/limits.h>
45 #include <sys/lock.h>
46 #include <sys/malloc.h>
47 #include <sys/mman.h>
48 #include <sys/mount.h>
49 #include <sys/mutex.h>
50 #include <sys/namei.h>
51 #include <sys/priv.h>
52 #include <sys/proc.h>
53 #include <sys/reboot.h>
54 #include <sys/resourcevar.h>
55 #include <sys/sched.h>
56 #include <sys/signalvar.h>
57 #include <sys/stat.h>
58 #include <sys/syscallsubr.h>
59 #include <sys/sysctl.h>
60 #include <sys/sysproto.h>
61 #include <sys/systm.h>
62 #include <sys/time.h>
63 #include <sys/vmmeter.h>
64 #include <sys/vnode.h>
65 #include <sys/wait.h>
66 #include <sys/cpuset.h>
67
68 #include <security/mac/mac_framework.h>
69
70 #include <vm/vm.h>
71 #include <vm/pmap.h>
72 #include <vm/vm_kern.h>
73 #include <vm/vm_map.h>
74 #include <vm/vm_extern.h>
75 #include <vm/vm_object.h>
76 #include <vm/swap_pager.h>
77
78 #include <compat/linux/linux_sysproto.h>
79 #include <compat/linux/linux_emul.h>
80 #include <compat/linux/linux_misc.h>
81
82 #ifdef COMPAT_LINUX32
83 #include <machine/../linux32/linux.h>
84 #include <machine/../linux32/linux32_proto.h>
85 #else
86 #include <machine/../linux/linux.h>
87 #include <machine/../linux/linux_proto.h>
88 #endif
89
90 #include <compat/linux/linux_mib.h>
91 #include <compat/linux/linux_signal.h>
92 #include <compat/linux/linux_util.h>
93
94 #ifdef __i386__
95 #include <machine/cputypes.h>
96 #endif
97
98 #define BSD_TO_LINUX_SIGNAL(sig) \
99 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
100
101 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
102 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
103 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
104 RLIMIT_MEMLOCK, RLIMIT_AS
105 };
106
107 struct l_sysinfo {
108 l_long uptime; /* Seconds since boot */
109 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */
110 #define LINUX_SYSINFO_LOADS_SCALE 65536
111 l_ulong totalram; /* Total usable main memory size */
112 l_ulong freeram; /* Available memory size */
113 l_ulong sharedram; /* Amount of shared memory */
114 l_ulong bufferram; /* Memory used by buffers */
115 l_ulong totalswap; /* Total swap space size */
116 l_ulong freeswap; /* swap space still available */
117 l_ushort procs; /* Number of current processes */
118 l_ushort pads;
119 l_ulong totalbig;
120 l_ulong freebig;
121 l_uint mem_unit;
122 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */
123 };
124 int
125 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
126 {
127 struct l_sysinfo sysinfo;
128 vm_object_t object;
129 int i, j;
130 struct timespec ts;
131
132 getnanouptime(&ts);
133 if (ts.tv_nsec != 0)
134 ts.tv_sec++;
135 sysinfo.uptime = ts.tv_sec;
136
137 /* Use the information from the mib to get our load averages */
138 for (i = 0; i < 3; i++)
139 sysinfo.loads[i] = averunnable.ldavg[i] *
140 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
141
142 sysinfo.totalram = physmem * PAGE_SIZE;
143 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
144
145 sysinfo.sharedram = 0;
146 mtx_lock(&vm_object_list_mtx);
147 TAILQ_FOREACH(object, &vm_object_list, object_list)
148 if (object->shadow_count > 1)
149 sysinfo.sharedram += object->resident_page_count;
150 mtx_unlock(&vm_object_list_mtx);
151
152 sysinfo.sharedram *= PAGE_SIZE;
153 sysinfo.bufferram = 0;
154
155 swap_pager_status(&i, &j);
156 sysinfo.totalswap = i * PAGE_SIZE;
157 sysinfo.freeswap = (i - j) * PAGE_SIZE;
158
159 sysinfo.procs = nprocs;
160
161 /* The following are only present in newer Linux kernels. */
162 sysinfo.totalbig = 0;
163 sysinfo.freebig = 0;
164 sysinfo.mem_unit = 1;
165
166 return copyout(&sysinfo, args->info, sizeof(sysinfo));
167 }
168
169 int
170 linux_alarm(struct thread *td, struct linux_alarm_args *args)
171 {
172 struct itimerval it, old_it;
173 int error;
174
175 #ifdef DEBUG
176 if (ldebug(alarm))
177 printf(ARGS(alarm, "%u"), args->secs);
178 #endif
179
180 if (args->secs > 100000000)
181 return (EINVAL);
182
183 it.it_value.tv_sec = (long)args->secs;
184 it.it_value.tv_usec = 0;
185 it.it_interval.tv_sec = 0;
186 it.it_interval.tv_usec = 0;
187 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
188 if (error)
189 return (error);
190 if (timevalisset(&old_it.it_value)) {
191 if (old_it.it_value.tv_usec != 0)
192 old_it.it_value.tv_sec++;
193 td->td_retval[0] = old_it.it_value.tv_sec;
194 }
195 return (0);
196 }
197
198 int
199 linux_brk(struct thread *td, struct linux_brk_args *args)
200 {
201 struct vmspace *vm = td->td_proc->p_vmspace;
202 vm_offset_t new, old;
203 struct obreak_args /* {
204 char * nsize;
205 } */ tmp;
206
207 #ifdef DEBUG
208 if (ldebug(brk))
209 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
210 #endif
211 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
212 new = (vm_offset_t)args->dsend;
213 tmp.nsize = (char *)new;
214 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp))
215 td->td_retval[0] = (long)new;
216 else
217 td->td_retval[0] = (long)old;
218
219 return 0;
220 }
221
222 #if defined(__i386__)
223 /* XXX: what about amd64/linux32? */
224
225 int
226 linux_uselib(struct thread *td, struct linux_uselib_args *args)
227 {
228 struct nameidata ni;
229 struct vnode *vp;
230 struct exec *a_out;
231 struct vattr attr;
232 vm_offset_t vmaddr;
233 unsigned long file_offset;
234 vm_offset_t buffer;
235 unsigned long bss_size;
236 char *library;
237 int error;
238 int locked, vfslocked;
239
240 LCONVPATHEXIST(td, args->library, &library);
241
242 #ifdef DEBUG
243 if (ldebug(uselib))
244 printf(ARGS(uselib, "%s"), library);
245 #endif
246
247 a_out = NULL;
248 vfslocked = 0;
249 locked = 0;
250 vp = NULL;
251
252 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
253 UIO_SYSSPACE, library, td);
254 error = namei(&ni);
255 LFREEPATH(library);
256 if (error)
257 goto cleanup;
258
259 vp = ni.ni_vp;
260 vfslocked = NDHASGIANT(&ni);
261 NDFREE(&ni, NDF_ONLY_PNBUF);
262
263 /*
264 * From here on down, we have a locked vnode that must be unlocked.
265 * XXX: The code below largely duplicates exec_check_permissions().
266 */
267 locked = 1;
268
269 /* Writable? */
270 if (vp->v_writecount) {
271 error = ETXTBSY;
272 goto cleanup;
273 }
274
275 /* Executable? */
276 error = VOP_GETATTR(vp, &attr, td->td_ucred, td);
277 if (error)
278 goto cleanup;
279
280 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
281 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
282 /* EACCESS is what exec(2) returns. */
283 error = ENOEXEC;
284 goto cleanup;
285 }
286
287 /* Sensible size? */
288 if (attr.va_size == 0) {
289 error = ENOEXEC;
290 goto cleanup;
291 }
292
293 /* Can we access it? */
294 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
295 if (error)
296 goto cleanup;
297
298 /*
299 * XXX: This should use vn_open() so that it is properly authorized,
300 * and to reduce code redundancy all over the place here.
301 * XXX: Not really, it duplicates far more of exec_check_permissions()
302 * than vn_open().
303 */
304 #ifdef MAC
305 error = mac_check_vnode_open(td->td_ucred, vp, FREAD);
306 if (error)
307 goto cleanup;
308 #endif
309 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
310 if (error)
311 goto cleanup;
312
313 /* Pull in executable header into kernel_map */
314 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
315 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
316 if (error)
317 goto cleanup;
318
319 /* Is it a Linux binary ? */
320 if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
321 error = ENOEXEC;
322 goto cleanup;
323 }
324
325 /*
326 * While we are here, we should REALLY do some more checks
327 */
328
329 /* Set file/virtual offset based on a.out variant. */
330 switch ((int)(a_out->a_magic & 0xffff)) {
331 case 0413: /* ZMAGIC */
332 file_offset = 1024;
333 break;
334 case 0314: /* QMAGIC */
335 file_offset = 0;
336 break;
337 default:
338 error = ENOEXEC;
339 goto cleanup;
340 }
341
342 bss_size = round_page(a_out->a_bss);
343
344 /* Check various fields in header for validity/bounds. */
345 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
346 error = ENOEXEC;
347 goto cleanup;
348 }
349
350 /* text + data can't exceed file size */
351 if (a_out->a_data + a_out->a_text > attr.va_size) {
352 error = EFAULT;
353 goto cleanup;
354 }
355
356 /*
357 * text/data/bss must not exceed limits
358 * XXX - this is not complete. it should check current usage PLUS
359 * the resources needed by this library.
360 */
361 PROC_LOCK(td->td_proc);
362 if (a_out->a_text > maxtsiz ||
363 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) {
364 PROC_UNLOCK(td->td_proc);
365 error = ENOMEM;
366 goto cleanup;
367 }
368 PROC_UNLOCK(td->td_proc);
369
370 /*
371 * Prevent more writers.
372 * XXX: Note that if any of the VM operations fail below we don't
373 * clear this flag.
374 */
375 vp->v_vflag |= VV_TEXT;
376
377 /*
378 * Lock no longer needed
379 */
380 locked = 0;
381 VOP_UNLOCK(vp, 0, td);
382 VFS_UNLOCK_GIANT(vfslocked);
383
384 /*
385 * Check if file_offset page aligned. Currently we cannot handle
386 * misalinged file offsets, and so we read in the entire image
387 * (what a waste).
388 */
389 if (file_offset & PAGE_MASK) {
390 #ifdef DEBUG
391 printf("uselib: Non page aligned binary %lu\n", file_offset);
392 #endif
393 /* Map text+data read/write/execute */
394
395 /* a_entry is the load address and is page aligned */
396 vmaddr = trunc_page(a_out->a_entry);
397
398 /* get anon user mapping, read+write+execute */
399 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
400 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL,
401 VM_PROT_ALL, 0);
402 if (error)
403 goto cleanup;
404
405 /* map file into kernel_map */
406 error = vm_mmap(kernel_map, &buffer,
407 round_page(a_out->a_text + a_out->a_data + file_offset),
408 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp,
409 trunc_page(file_offset));
410 if (error)
411 goto cleanup;
412
413 /* copy from kernel VM space to user space */
414 error = copyout(PTRIN(buffer + file_offset),
415 (void *)vmaddr, a_out->a_text + a_out->a_data);
416
417 /* release temporary kernel space */
418 vm_map_remove(kernel_map, buffer, buffer +
419 round_page(a_out->a_text + a_out->a_data + file_offset));
420
421 if (error)
422 goto cleanup;
423 } else {
424 #ifdef DEBUG
425 printf("uselib: Page aligned binary %lu\n", file_offset);
426 #endif
427 /*
428 * for QMAGIC, a_entry is 20 bytes beyond the load address
429 * to skip the executable header
430 */
431 vmaddr = trunc_page(a_out->a_entry);
432
433 /*
434 * Map it all into the process's space as a single
435 * copy-on-write "data" segment.
436 */
437 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
438 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
439 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
440 if (error)
441 goto cleanup;
442 }
443 #ifdef DEBUG
444 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
445 ((long *)vmaddr)[1]);
446 #endif
447 if (bss_size != 0) {
448 /* Calculate BSS start address */
449 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
450 a_out->a_data;
451
452 /* allocate some 'anon' space */
453 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
454 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
455 if (error)
456 goto cleanup;
457 }
458
459 cleanup:
460 /* Unlock vnode if needed */
461 if (locked) {
462 VOP_UNLOCK(vp, 0, td);
463 VFS_UNLOCK_GIANT(vfslocked);
464 }
465
466 /* Release the kernel mapping. */
467 if (a_out)
468 vm_map_remove(kernel_map, (vm_offset_t)a_out,
469 (vm_offset_t)a_out + PAGE_SIZE);
470
471 return error;
472 }
473
474 #endif /* __i386__ */
475
476 int
477 linux_select(struct thread *td, struct linux_select_args *args)
478 {
479 l_timeval ltv;
480 struct timeval tv0, tv1, utv, *tvp;
481 int error;
482
483 #ifdef DEBUG
484 if (ldebug(select))
485 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
486 (void *)args->readfds, (void *)args->writefds,
487 (void *)args->exceptfds, (void *)args->timeout);
488 #endif
489
490 /*
491 * Store current time for computation of the amount of
492 * time left.
493 */
494 if (args->timeout) {
495 if ((error = copyin(args->timeout, <v, sizeof(ltv))))
496 goto select_out;
497 utv.tv_sec = ltv.tv_sec;
498 utv.tv_usec = ltv.tv_usec;
499 #ifdef DEBUG
500 if (ldebug(select))
501 printf(LMSG("incoming timeout (%jd/%ld)"),
502 (intmax_t)utv.tv_sec, utv.tv_usec);
503 #endif
504
505 if (itimerfix(&utv)) {
506 /*
507 * The timeval was invalid. Convert it to something
508 * valid that will act as it does under Linux.
509 */
510 utv.tv_sec += utv.tv_usec / 1000000;
511 utv.tv_usec %= 1000000;
512 if (utv.tv_usec < 0) {
513 utv.tv_sec -= 1;
514 utv.tv_usec += 1000000;
515 }
516 if (utv.tv_sec < 0)
517 timevalclear(&utv);
518 }
519 microtime(&tv0);
520 tvp = &utv;
521 } else
522 tvp = NULL;
523
524 error = kern_select(td, args->nfds, args->readfds, args->writefds,
525 args->exceptfds, tvp);
526
527 #ifdef DEBUG
528 if (ldebug(select))
529 printf(LMSG("real select returns %d"), error);
530 #endif
531 if (error) {
532 /*
533 * See fs/select.c in the Linux kernel. Without this,
534 * Maelstrom doesn't work.
535 */
536 if (error == ERESTART)
537 error = EINTR;
538 goto select_out;
539 }
540
541 if (args->timeout) {
542 if (td->td_retval[0]) {
543 /*
544 * Compute how much time was left of the timeout,
545 * by subtracting the current time and the time
546 * before we started the call, and subtracting
547 * that result from the user-supplied value.
548 */
549 microtime(&tv1);
550 timevalsub(&tv1, &tv0);
551 timevalsub(&utv, &tv1);
552 if (utv.tv_sec < 0)
553 timevalclear(&utv);
554 } else
555 timevalclear(&utv);
556 #ifdef DEBUG
557 if (ldebug(select))
558 printf(LMSG("outgoing timeout (%jd/%ld)"),
559 (intmax_t)utv.tv_sec, utv.tv_usec);
560 #endif
561 ltv.tv_sec = utv.tv_sec;
562 ltv.tv_usec = utv.tv_usec;
563 if ((error = copyout(<v, args->timeout, sizeof(ltv))))
564 goto select_out;
565 }
566
567 select_out:
568 #ifdef DEBUG
569 if (ldebug(select))
570 printf(LMSG("select_out -> %d"), error);
571 #endif
572 return error;
573 }
574
575 int
576 linux_mremap(struct thread *td, struct linux_mremap_args *args)
577 {
578 struct munmap_args /* {
579 void *addr;
580 size_t len;
581 } */ bsd_args;
582 int error = 0;
583
584 #ifdef DEBUG
585 if (ldebug(mremap))
586 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
587 (void *)(uintptr_t)args->addr,
588 (unsigned long)args->old_len,
589 (unsigned long)args->new_len,
590 (unsigned long)args->flags);
591 #endif
592
593 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
594 td->td_retval[0] = 0;
595 return (EINVAL);
596 }
597
598 /*
599 * Check for the page alignment.
600 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
601 */
602 if (args->addr & PAGE_MASK) {
603 td->td_retval[0] = 0;
604 return (EINVAL);
605 }
606
607 args->new_len = round_page(args->new_len);
608 args->old_len = round_page(args->old_len);
609
610 if (args->new_len > args->old_len) {
611 td->td_retval[0] = 0;
612 return ENOMEM;
613 }
614
615 if (args->new_len < args->old_len) {
616 bsd_args.addr =
617 (caddr_t)((uintptr_t)args->addr + args->new_len);
618 bsd_args.len = args->old_len - args->new_len;
619 error = munmap(td, &bsd_args);
620 }
621
622 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
623 return error;
624 }
625
626 #define LINUX_MS_ASYNC 0x0001
627 #define LINUX_MS_INVALIDATE 0x0002
628 #define LINUX_MS_SYNC 0x0004
629
630 int
631 linux_msync(struct thread *td, struct linux_msync_args *args)
632 {
633 struct msync_args bsd_args;
634
635 bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
636 bsd_args.len = (uintptr_t)args->len;
637 bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
638
639 return msync(td, &bsd_args);
640 }
641
642 int
643 linux_time(struct thread *td, struct linux_time_args *args)
644 {
645 struct timeval tv;
646 l_time_t tm;
647 int error;
648
649 #ifdef DEBUG
650 if (ldebug(time))
651 printf(ARGS(time, "*"));
652 #endif
653
654 microtime(&tv);
655 tm = tv.tv_sec;
656 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
657 return error;
658 td->td_retval[0] = tm;
659 return 0;
660 }
661
662 struct l_times_argv {
663 l_long tms_utime;
664 l_long tms_stime;
665 l_long tms_cutime;
666 l_long tms_cstime;
667 };
668
669 #define CLK_TCK 100 /* Linux uses 100 */
670
671 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
672
673 int
674 linux_times(struct thread *td, struct linux_times_args *args)
675 {
676 struct timeval tv, utime, stime, cutime, cstime;
677 struct l_times_argv tms;
678 struct proc *p;
679 int error;
680
681 #ifdef DEBUG
682 if (ldebug(times))
683 printf(ARGS(times, "*"));
684 #endif
685
686 if (args->buf != NULL) {
687 p = td->td_proc;
688 PROC_LOCK(p);
689 PROC_SLOCK(p);
690 calcru(p, &utime, &stime);
691 PROC_SUNLOCK(p);
692 calccru(p, &cutime, &cstime);
693 PROC_UNLOCK(p);
694
695 tms.tms_utime = CONVTCK(utime);
696 tms.tms_stime = CONVTCK(stime);
697
698 tms.tms_cutime = CONVTCK(cutime);
699 tms.tms_cstime = CONVTCK(cstime);
700
701 if ((error = copyout(&tms, args->buf, sizeof(tms))))
702 return error;
703 }
704
705 microuptime(&tv);
706 td->td_retval[0] = (int)CONVTCK(tv);
707 return 0;
708 }
709
710 int
711 linux_newuname(struct thread *td, struct linux_newuname_args *args)
712 {
713 struct l_new_utsname utsname;
714 char osname[LINUX_MAX_UTSNAME];
715 char osrelease[LINUX_MAX_UTSNAME];
716 char *p;
717
718 #ifdef DEBUG
719 if (ldebug(newuname))
720 printf(ARGS(newuname, "*"));
721 #endif
722
723 linux_get_osname(td, osname);
724 linux_get_osrelease(td, osrelease);
725
726 bzero(&utsname, sizeof(utsname));
727 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
728 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
729 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
730 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
731 for (p = utsname.version; *p != '\0'; ++p)
732 if (*p == '\n') {
733 *p = '\0';
734 break;
735 }
736 #ifdef __i386__
737 {
738 const char *class;
739
740 switch (cpu_class) {
741 case CPUCLASS_686:
742 class = "i686";
743 break;
744 case CPUCLASS_586:
745 class = "i586";
746 break;
747 case CPUCLASS_486:
748 class = "i486";
749 break;
750 default:
751 class = "i386";
752 }
753 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME);
754 }
755 #elif defined(__amd64__) /* XXX: Linux can change 'personality'. */
756 #ifdef COMPAT_LINUX32
757 strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME);
758 #else
759 strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME);
760 #endif /* COMPAT_LINUX32 */
761 #else /* something other than i386 or amd64 - assume we and Linux agree */
762 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME);
763 #endif /* __i386__ */
764 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME);
765
766 return (copyout(&utsname, args->buf, sizeof(utsname)));
767 }
768
769 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
770 struct l_utimbuf {
771 l_time_t l_actime;
772 l_time_t l_modtime;
773 };
774
775 int
776 linux_utime(struct thread *td, struct linux_utime_args *args)
777 {
778 struct timeval tv[2], *tvp;
779 struct l_utimbuf lut;
780 char *fname;
781 int error;
782
783 LCONVPATHEXIST(td, args->fname, &fname);
784
785 #ifdef DEBUG
786 if (ldebug(utime))
787 printf(ARGS(utime, "%s, *"), fname);
788 #endif
789
790 if (args->times) {
791 if ((error = copyin(args->times, &lut, sizeof lut))) {
792 LFREEPATH(fname);
793 return error;
794 }
795 tv[0].tv_sec = lut.l_actime;
796 tv[0].tv_usec = 0;
797 tv[1].tv_sec = lut.l_modtime;
798 tv[1].tv_usec = 0;
799 tvp = tv;
800 } else
801 tvp = NULL;
802
803 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
804 LFREEPATH(fname);
805 return (error);
806 }
807
808 int
809 linux_utimes(struct thread *td, struct linux_utimes_args *args)
810 {
811 l_timeval ltv[2];
812 struct timeval tv[2], *tvp = NULL;
813 char *fname;
814 int error;
815
816 LCONVPATHEXIST(td, args->fname, &fname);
817
818 #ifdef DEBUG
819 if (ldebug(utimes))
820 printf(ARGS(utimes, "%s, *"), fname);
821 #endif
822
823 if (args->tptr != NULL) {
824 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
825 LFREEPATH(fname);
826 return (error);
827 }
828 tv[0].tv_sec = ltv[0].tv_sec;
829 tv[0].tv_usec = ltv[0].tv_usec;
830 tv[1].tv_sec = ltv[1].tv_sec;
831 tv[1].tv_usec = ltv[1].tv_usec;
832 tvp = tv;
833 }
834
835 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
836 LFREEPATH(fname);
837 return (error);
838 }
839 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
840
841 #define __WCLONE 0x80000000
842
843 int
844 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
845 {
846 int error, options, tmpstat;
847
848 #ifdef DEBUG
849 if (ldebug(waitpid))
850 printf(ARGS(waitpid, "%d, %p, %d"),
851 args->pid, (void *)args->status, args->options);
852 #endif
853 /*
854 * this is necessary because the test in kern_wait doesn't work
855 * because we mess with the options here
856 */
857 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
858 return (EINVAL);
859
860 options = (args->options & (WNOHANG | WUNTRACED));
861 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
862 if (args->options & __WCLONE)
863 options |= WLINUXCLONE;
864
865 error = kern_wait(td, args->pid, &tmpstat, options, NULL);
866 if (error)
867 return error;
868
869 if (args->status) {
870 tmpstat &= 0xffff;
871 if (WIFSIGNALED(tmpstat))
872 tmpstat = (tmpstat & 0xffffff80) |
873 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
874 else if (WIFSTOPPED(tmpstat))
875 tmpstat = (tmpstat & 0xffff00ff) |
876 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
877 return copyout(&tmpstat, args->status, sizeof(int));
878 }
879
880 return 0;
881 }
882
883 int
884 linux_wait4(struct thread *td, struct linux_wait4_args *args)
885 {
886 int error, options, tmpstat;
887 struct rusage ru, *rup;
888 struct proc *p;
889
890 #ifdef DEBUG
891 if (ldebug(wait4))
892 printf(ARGS(wait4, "%d, %p, %d, %p"),
893 args->pid, (void *)args->status, args->options,
894 (void *)args->rusage);
895 #endif
896
897 options = (args->options & (WNOHANG | WUNTRACED));
898 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
899 if (args->options & __WCLONE)
900 options |= WLINUXCLONE;
901
902 if (args->rusage != NULL)
903 rup = &ru;
904 else
905 rup = NULL;
906 error = kern_wait(td, args->pid, &tmpstat, options, rup);
907 if (error)
908 return error;
909
910 p = td->td_proc;
911 PROC_LOCK(p);
912 sigqueue_delete(&p->p_sigqueue, SIGCHLD);
913 PROC_UNLOCK(p);
914
915 if (args->status) {
916 tmpstat &= 0xffff;
917 if (WIFSIGNALED(tmpstat))
918 tmpstat = (tmpstat & 0xffffff80) |
919 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
920 else if (WIFSTOPPED(tmpstat))
921 tmpstat = (tmpstat & 0xffff00ff) |
922 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
923 error = copyout(&tmpstat, args->status, sizeof(int));
924 }
925 if (args->rusage != NULL && error == 0)
926 error = copyout(&ru, args->rusage, sizeof(ru));
927
928 return (error);
929 }
930
931 int
932 linux_mknod(struct thread *td, struct linux_mknod_args *args)
933 {
934 char *path;
935 int error;
936
937 LCONVPATHCREAT(td, args->path, &path);
938
939 #ifdef DEBUG
940 if (ldebug(mknod))
941 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
942 #endif
943
944 switch (args->mode & S_IFMT) {
945 case S_IFIFO:
946 case S_IFSOCK:
947 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
948 break;
949
950 case S_IFCHR:
951 case S_IFBLK:
952 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
953 args->dev);
954 break;
955
956 case S_IFDIR:
957 error = EPERM;
958 break;
959
960 case 0:
961 args->mode |= S_IFREG;
962 /* FALLTHROUGH */
963 case S_IFREG:
964 error = kern_open(td, path, UIO_SYSSPACE,
965 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
966 break;
967
968 default:
969 error = EINVAL;
970 break;
971 }
972 LFREEPATH(path);
973 return (error);
974 }
975
976 /*
977 * UGH! This is just about the dumbest idea I've ever heard!!
978 */
979 int
980 linux_personality(struct thread *td, struct linux_personality_args *args)
981 {
982 #ifdef DEBUG
983 if (ldebug(personality))
984 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
985 #endif
986 if (args->per != 0)
987 return EINVAL;
988
989 /* Yes Jim, it's still a Linux... */
990 td->td_retval[0] = 0;
991 return 0;
992 }
993
994 struct l_itimerval {
995 l_timeval it_interval;
996 l_timeval it_value;
997 };
998
999 #define B2L_ITIMERVAL(bip, lip) \
1000 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \
1001 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \
1002 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \
1003 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
1004
1005 int
1006 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
1007 {
1008 int error;
1009 struct l_itimerval ls;
1010 struct itimerval aitv, oitv;
1011
1012 #ifdef DEBUG
1013 if (ldebug(setitimer))
1014 printf(ARGS(setitimer, "%p, %p"),
1015 (void *)uap->itv, (void *)uap->oitv);
1016 #endif
1017
1018 if (uap->itv == NULL) {
1019 uap->itv = uap->oitv;
1020 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
1021 }
1022
1023 error = copyin(uap->itv, &ls, sizeof(ls));
1024 if (error != 0)
1025 return (error);
1026 B2L_ITIMERVAL(&aitv, &ls);
1027 #ifdef DEBUG
1028 if (ldebug(setitimer)) {
1029 printf("setitimer: value: sec: %jd, usec: %ld\n",
1030 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
1031 printf("setitimer: interval: sec: %jd, usec: %ld\n",
1032 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
1033 }
1034 #endif
1035 error = kern_setitimer(td, uap->which, &aitv, &oitv);
1036 if (error != 0 || uap->oitv == NULL)
1037 return (error);
1038 B2L_ITIMERVAL(&ls, &oitv);
1039
1040 return (copyout(&ls, uap->oitv, sizeof(ls)));
1041 }
1042
1043 int
1044 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
1045 {
1046 int error;
1047 struct l_itimerval ls;
1048 struct itimerval aitv;
1049
1050 #ifdef DEBUG
1051 if (ldebug(getitimer))
1052 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
1053 #endif
1054 error = kern_getitimer(td, uap->which, &aitv);
1055 if (error != 0)
1056 return (error);
1057 B2L_ITIMERVAL(&ls, &aitv);
1058 return (copyout(&ls, uap->itv, sizeof(ls)));
1059 }
1060
1061 int
1062 linux_nice(struct thread *td, struct linux_nice_args *args)
1063 {
1064 struct setpriority_args bsd_args;
1065
1066 bsd_args.which = PRIO_PROCESS;
1067 bsd_args.who = 0; /* current process */
1068 bsd_args.prio = args->inc;
1069 return setpriority(td, &bsd_args);
1070 }
1071
1072 int
1073 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
1074 {
1075 struct ucred *newcred, *oldcred;
1076 l_gid_t linux_gidset[NGROUPS];
1077 gid_t *bsd_gidset;
1078 int ngrp, error;
1079 struct proc *p;
1080
1081 ngrp = args->gidsetsize;
1082 if (ngrp < 0 || ngrp >= NGROUPS)
1083 return (EINVAL);
1084 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
1085 if (error)
1086 return (error);
1087 newcred = crget();
1088 p = td->td_proc;
1089 PROC_LOCK(p);
1090 oldcred = p->p_ucred;
1091
1092 /*
1093 * cr_groups[0] holds egid. Setting the whole set from
1094 * the supplied set will cause egid to be changed too.
1095 * Keep cr_groups[0] unchanged to prevent that.
1096 */
1097
1098 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
1099 PROC_UNLOCK(p);
1100 crfree(newcred);
1101 return (error);
1102 }
1103
1104 crcopy(newcred, oldcred);
1105 if (ngrp > 0) {
1106 newcred->cr_ngroups = ngrp + 1;
1107
1108 bsd_gidset = newcred->cr_groups;
1109 ngrp--;
1110 while (ngrp >= 0) {
1111 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
1112 ngrp--;
1113 }
1114 } else
1115 newcred->cr_ngroups = 1;
1116
1117 setsugid(p);
1118 p->p_ucred = newcred;
1119 PROC_UNLOCK(p);
1120 crfree(oldcred);
1121 return (0);
1122 }
1123
1124 int
1125 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
1126 {
1127 struct ucred *cred;
1128 l_gid_t linux_gidset[NGROUPS];
1129 gid_t *bsd_gidset;
1130 int bsd_gidsetsz, ngrp, error;
1131
1132 cred = td->td_ucred;
1133 bsd_gidset = cred->cr_groups;
1134 bsd_gidsetsz = cred->cr_ngroups - 1;
1135
1136 /*
1137 * cr_groups[0] holds egid. Returning the whole set
1138 * here will cause a duplicate. Exclude cr_groups[0]
1139 * to prevent that.
1140 */
1141
1142 if ((ngrp = args->gidsetsize) == 0) {
1143 td->td_retval[0] = bsd_gidsetsz;
1144 return (0);
1145 }
1146
1147 if (ngrp < bsd_gidsetsz)
1148 return (EINVAL);
1149
1150 ngrp = 0;
1151 while (ngrp < bsd_gidsetsz) {
1152 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1153 ngrp++;
1154 }
1155
1156 if ((error = copyout(linux_gidset, args->grouplist,
1157 ngrp * sizeof(l_gid_t))))
1158 return (error);
1159
1160 td->td_retval[0] = ngrp;
1161 return (0);
1162 }
1163
1164 int
1165 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
1166 {
1167 struct rlimit bsd_rlim;
1168 struct l_rlimit rlim;
1169 u_int which;
1170 int error;
1171
1172 #ifdef DEBUG
1173 if (ldebug(setrlimit))
1174 printf(ARGS(setrlimit, "%d, %p"),
1175 args->resource, (void *)args->rlim);
1176 #endif
1177
1178 if (args->resource >= LINUX_RLIM_NLIMITS)
1179 return (EINVAL);
1180
1181 which = linux_to_bsd_resource[args->resource];
1182 if (which == -1)
1183 return (EINVAL);
1184
1185 error = copyin(args->rlim, &rlim, sizeof(rlim));
1186 if (error)
1187 return (error);
1188
1189 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
1190 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
1191 return (kern_setrlimit(td, which, &bsd_rlim));
1192 }
1193
1194 int
1195 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
1196 {
1197 struct l_rlimit rlim;
1198 struct proc *p = td->td_proc;
1199 struct rlimit bsd_rlim;
1200 u_int which;
1201
1202 #ifdef DEBUG
1203 if (ldebug(old_getrlimit))
1204 printf(ARGS(old_getrlimit, "%d, %p"),
1205 args->resource, (void *)args->rlim);
1206 #endif
1207
1208 if (args->resource >= LINUX_RLIM_NLIMITS)
1209 return (EINVAL);
1210
1211 which = linux_to_bsd_resource[args->resource];
1212 if (which == -1)
1213 return (EINVAL);
1214
1215 PROC_LOCK(p);
1216 lim_rlimit(p, which, &bsd_rlim);
1217 PROC_UNLOCK(p);
1218
1219 #ifdef COMPAT_LINUX32
1220 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
1221 if (rlim.rlim_cur == UINT_MAX)
1222 rlim.rlim_cur = INT_MAX;
1223 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
1224 if (rlim.rlim_max == UINT_MAX)
1225 rlim.rlim_max = INT_MAX;
1226 #else
1227 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
1228 if (rlim.rlim_cur == ULONG_MAX)
1229 rlim.rlim_cur = LONG_MAX;
1230 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
1231 if (rlim.rlim_max == ULONG_MAX)
1232 rlim.rlim_max = LONG_MAX;
1233 #endif
1234 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1235 }
1236
1237 int
1238 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
1239 {
1240 struct l_rlimit rlim;
1241 struct proc *p = td->td_proc;
1242 struct rlimit bsd_rlim;
1243 u_int which;
1244
1245 #ifdef DEBUG
1246 if (ldebug(getrlimit))
1247 printf(ARGS(getrlimit, "%d, %p"),
1248 args->resource, (void *)args->rlim);
1249 #endif
1250
1251 if (args->resource >= LINUX_RLIM_NLIMITS)
1252 return (EINVAL);
1253
1254 which = linux_to_bsd_resource[args->resource];
1255 if (which == -1)
1256 return (EINVAL);
1257
1258 PROC_LOCK(p);
1259 lim_rlimit(p, which, &bsd_rlim);
1260 PROC_UNLOCK(p);
1261
1262 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
1263 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
1264 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1265 }
1266
1267 int
1268 linux_sched_setscheduler(struct thread *td,
1269 struct linux_sched_setscheduler_args *args)
1270 {
1271 struct sched_setscheduler_args bsd;
1272
1273 #ifdef DEBUG
1274 if (ldebug(sched_setscheduler))
1275 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
1276 args->pid, args->policy, (const void *)args->param);
1277 #endif
1278
1279 switch (args->policy) {
1280 case LINUX_SCHED_OTHER:
1281 bsd.policy = SCHED_OTHER;
1282 break;
1283 case LINUX_SCHED_FIFO:
1284 bsd.policy = SCHED_FIFO;
1285 break;
1286 case LINUX_SCHED_RR:
1287 bsd.policy = SCHED_RR;
1288 break;
1289 default:
1290 return EINVAL;
1291 }
1292
1293 bsd.pid = args->pid;
1294 bsd.param = (struct sched_param *)args->param;
1295 return sched_setscheduler(td, &bsd);
1296 }
1297
1298 int
1299 linux_sched_getscheduler(struct thread *td,
1300 struct linux_sched_getscheduler_args *args)
1301 {
1302 struct sched_getscheduler_args bsd;
1303 int error;
1304
1305 #ifdef DEBUG
1306 if (ldebug(sched_getscheduler))
1307 printf(ARGS(sched_getscheduler, "%d"), args->pid);
1308 #endif
1309
1310 bsd.pid = args->pid;
1311 error = sched_getscheduler(td, &bsd);
1312
1313 switch (td->td_retval[0]) {
1314 case SCHED_OTHER:
1315 td->td_retval[0] = LINUX_SCHED_OTHER;
1316 break;
1317 case SCHED_FIFO:
1318 td->td_retval[0] = LINUX_SCHED_FIFO;
1319 break;
1320 case SCHED_RR:
1321 td->td_retval[0] = LINUX_SCHED_RR;
1322 break;
1323 }
1324
1325 return error;
1326 }
1327
1328 int
1329 linux_sched_get_priority_max(struct thread *td,
1330 struct linux_sched_get_priority_max_args *args)
1331 {
1332 struct sched_get_priority_max_args bsd;
1333
1334 #ifdef DEBUG
1335 if (ldebug(sched_get_priority_max))
1336 printf(ARGS(sched_get_priority_max, "%d"), args->policy);
1337 #endif
1338
1339 switch (args->policy) {
1340 case LINUX_SCHED_OTHER:
1341 bsd.policy = SCHED_OTHER;
1342 break;
1343 case LINUX_SCHED_FIFO:
1344 bsd.policy = SCHED_FIFO;
1345 break;
1346 case LINUX_SCHED_RR:
1347 bsd.policy = SCHED_RR;
1348 break;
1349 default:
1350 return EINVAL;
1351 }
1352 return sched_get_priority_max(td, &bsd);
1353 }
1354
1355 int
1356 linux_sched_get_priority_min(struct thread *td,
1357 struct linux_sched_get_priority_min_args *args)
1358 {
1359 struct sched_get_priority_min_args bsd;
1360
1361 #ifdef DEBUG
1362 if (ldebug(sched_get_priority_min))
1363 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
1364 #endif
1365
1366 switch (args->policy) {
1367 case LINUX_SCHED_OTHER:
1368 bsd.policy = SCHED_OTHER;
1369 break;
1370 case LINUX_SCHED_FIFO:
1371 bsd.policy = SCHED_FIFO;
1372 break;
1373 case LINUX_SCHED_RR:
1374 bsd.policy = SCHED_RR;
1375 break;
1376 default:
1377 return EINVAL;
1378 }
1379 return sched_get_priority_min(td, &bsd);
1380 }
1381
1382 #define REBOOT_CAD_ON 0x89abcdef
1383 #define REBOOT_CAD_OFF 0
1384 #define REBOOT_HALT 0xcdef0123
1385 #define REBOOT_RESTART 0x01234567
1386 #define REBOOT_RESTART2 0xA1B2C3D4
1387 #define REBOOT_POWEROFF 0x4321FEDC
1388 #define REBOOT_MAGIC1 0xfee1dead
1389 #define REBOOT_MAGIC2 0x28121969
1390 #define REBOOT_MAGIC2A 0x05121996
1391 #define REBOOT_MAGIC2B 0x16041998
1392
1393 int
1394 linux_reboot(struct thread *td, struct linux_reboot_args *args)
1395 {
1396 struct reboot_args bsd_args;
1397
1398 #ifdef DEBUG
1399 if (ldebug(reboot))
1400 printf(ARGS(reboot, "0x%x"), args->cmd);
1401 #endif
1402
1403 if (args->magic1 != REBOOT_MAGIC1)
1404 return EINVAL;
1405
1406 switch (args->magic2) {
1407 case REBOOT_MAGIC2:
1408 case REBOOT_MAGIC2A:
1409 case REBOOT_MAGIC2B:
1410 break;
1411 default:
1412 return EINVAL;
1413 }
1414
1415 switch (args->cmd) {
1416 case REBOOT_CAD_ON:
1417 case REBOOT_CAD_OFF:
1418 return (priv_check(td, PRIV_REBOOT));
1419 case REBOOT_HALT:
1420 bsd_args.opt = RB_HALT;
1421 break;
1422 case REBOOT_RESTART:
1423 case REBOOT_RESTART2:
1424 bsd_args.opt = 0;
1425 break;
1426 case REBOOT_POWEROFF:
1427 bsd_args.opt = RB_POWEROFF;
1428 break;
1429 default:
1430 return EINVAL;
1431 }
1432 return reboot(td, &bsd_args);
1433 }
1434
1435
1436 /*
1437 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1438 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that
1439 * are assumed to be preserved. The following lightweight syscalls fixes
1440 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c
1441 *
1442 * linux_getpid() - MP SAFE
1443 * linux_getgid() - MP SAFE
1444 * linux_getuid() - MP SAFE
1445 */
1446
1447 int
1448 linux_getpid(struct thread *td, struct linux_getpid_args *args)
1449 {
1450 struct linux_emuldata *em;
1451
1452 #ifdef DEBUG
1453 if (ldebug(getpid))
1454 printf(ARGS(getpid, ""));
1455 #endif
1456
1457 if (linux_use26(td)) {
1458 em = em_find(td->td_proc, EMUL_DONTLOCK);
1459 KASSERT(em != NULL, ("getpid: emuldata not found.\n"));
1460 td->td_retval[0] = em->shared->group_pid;
1461 } else {
1462 td->td_retval[0] = td->td_proc->p_pid;
1463 }
1464
1465 return (0);
1466 }
1467
1468 int
1469 linux_gettid(struct thread *td, struct linux_gettid_args *args)
1470 {
1471
1472 #ifdef DEBUG
1473 if (ldebug(gettid))
1474 printf(ARGS(gettid, ""));
1475 #endif
1476
1477 td->td_retval[0] = td->td_proc->p_pid;
1478 return (0);
1479 }
1480
1481
1482 int
1483 linux_getppid(struct thread *td, struct linux_getppid_args *args)
1484 {
1485 struct linux_emuldata *em;
1486 struct proc *p, *pp;
1487
1488 #ifdef DEBUG
1489 if (ldebug(getppid))
1490 printf(ARGS(getppid, ""));
1491 #endif
1492
1493 if (!linux_use26(td)) {
1494 PROC_LOCK(td->td_proc);
1495 td->td_retval[0] = td->td_proc->p_pptr->p_pid;
1496 PROC_UNLOCK(td->td_proc);
1497 return (0);
1498 }
1499
1500 em = em_find(td->td_proc, EMUL_DONTLOCK);
1501
1502 KASSERT(em != NULL, ("getppid: process emuldata not found.\n"));
1503
1504 /* find the group leader */
1505 p = pfind(em->shared->group_pid);
1506
1507 if (p == NULL) {
1508 #ifdef DEBUG
1509 printf(LMSG("parent process not found.\n"));
1510 #endif
1511 return (0);
1512 }
1513
1514 pp = p->p_pptr; /* switch to parent */
1515 PROC_LOCK(pp);
1516 PROC_UNLOCK(p);
1517
1518 /* if its also linux process */
1519 if (pp->p_sysent == &elf_linux_sysvec) {
1520 em = em_find(pp, EMUL_DONTLOCK);
1521 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n"));
1522
1523 td->td_retval[0] = em->shared->group_pid;
1524 } else
1525 td->td_retval[0] = pp->p_pid;
1526
1527 PROC_UNLOCK(pp);
1528
1529 return (0);
1530 }
1531
1532 int
1533 linux_getgid(struct thread *td, struct linux_getgid_args *args)
1534 {
1535
1536 #ifdef DEBUG
1537 if (ldebug(getgid))
1538 printf(ARGS(getgid, ""));
1539 #endif
1540
1541 td->td_retval[0] = td->td_ucred->cr_rgid;
1542 return (0);
1543 }
1544
1545 int
1546 linux_getuid(struct thread *td, struct linux_getuid_args *args)
1547 {
1548
1549 #ifdef DEBUG
1550 if (ldebug(getuid))
1551 printf(ARGS(getuid, ""));
1552 #endif
1553
1554 td->td_retval[0] = td->td_ucred->cr_ruid;
1555 return (0);
1556 }
1557
1558
1559 int
1560 linux_getsid(struct thread *td, struct linux_getsid_args *args)
1561 {
1562 struct getsid_args bsd;
1563
1564 #ifdef DEBUG
1565 if (ldebug(getsid))
1566 printf(ARGS(getsid, "%i"), args->pid);
1567 #endif
1568
1569 bsd.pid = args->pid;
1570 return getsid(td, &bsd);
1571 }
1572
1573 int
1574 linux_nosys(struct thread *td, struct nosys_args *ignore)
1575 {
1576
1577 return (ENOSYS);
1578 }
1579
1580 int
1581 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
1582 {
1583 struct getpriority_args bsd_args;
1584 int error;
1585
1586 #ifdef DEBUG
1587 if (ldebug(getpriority))
1588 printf(ARGS(getpriority, "%i, %i"), args->which, args->who);
1589 #endif
1590
1591 bsd_args.which = args->which;
1592 bsd_args.who = args->who;
1593 error = getpriority(td, &bsd_args);
1594 td->td_retval[0] = 20 - td->td_retval[0];
1595 return error;
1596 }
1597
1598 int
1599 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
1600 {
1601 int name[2];
1602
1603 #ifdef DEBUG
1604 if (ldebug(sethostname))
1605 printf(ARGS(sethostname, "*, %i"), args->len);
1606 #endif
1607
1608 name[0] = CTL_KERN;
1609 name[1] = KERN_HOSTNAME;
1610 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
1611 args->len, 0, 0));
1612 }
1613
1614 int
1615 linux_exit_group(struct thread *td, struct linux_exit_group_args *args)
1616 {
1617 struct linux_emuldata *em, *td_em, *tmp_em;
1618 struct proc *sp;
1619
1620 #ifdef DEBUG
1621 if (ldebug(exit_group))
1622 printf(ARGS(exit_group, "%i"), args->error_code);
1623 #endif
1624
1625 if (linux_use26(td)) {
1626 td_em = em_find(td->td_proc, EMUL_DONTLOCK);
1627
1628 KASSERT(td_em != NULL, ("exit_group: emuldata not found.\n"));
1629
1630 EMUL_SHARED_RLOCK(&emul_shared_lock);
1631 LIST_FOREACH_SAFE(em, &td_em->shared->threads, threads, tmp_em) {
1632 if (em->pid == td_em->pid)
1633 continue;
1634
1635 sp = pfind(em->pid);
1636 psignal(sp, SIGKILL);
1637 PROC_UNLOCK(sp);
1638 #ifdef DEBUG
1639 printf(LMSG("linux_sys_exit_group: kill PID %d\n"), em->pid);
1640 #endif
1641 }
1642
1643 EMUL_SHARED_RUNLOCK(&emul_shared_lock);
1644 }
1645 /*
1646 * XXX: we should send a signal to the parent if
1647 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?)
1648 * as it doesnt occur often.
1649 */
1650 exit1(td, W_EXITCODE(args->error_code, 0));
1651
1652 return (0);
1653 }
1654
1655 int
1656 linux_prctl(struct thread *td, struct linux_prctl_args *args)
1657 {
1658 int error = 0, max_size;
1659 struct proc *p = td->td_proc;
1660 char comm[LINUX_MAX_COMM_LEN];
1661 struct linux_emuldata *em;
1662 int pdeath_signal;
1663
1664 #ifdef DEBUG
1665 if (ldebug(prctl))
1666 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option,
1667 args->arg2, args->arg3, args->arg4, args->arg5);
1668 #endif
1669
1670 switch (args->option) {
1671 case LINUX_PR_SET_PDEATHSIG:
1672 if (!LINUX_SIG_VALID(args->arg2))
1673 return (EINVAL);
1674 em = em_find(p, EMUL_DOLOCK);
1675 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1676 em->pdeath_signal = args->arg2;
1677 EMUL_UNLOCK(&emul_lock);
1678 break;
1679 case LINUX_PR_GET_PDEATHSIG:
1680 em = em_find(p, EMUL_DOLOCK);
1681 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1682 pdeath_signal = em->pdeath_signal;
1683 EMUL_UNLOCK(&emul_lock);
1684 error = copyout(&pdeath_signal,
1685 (void *)(register_t)args->arg2,
1686 sizeof(pdeath_signal));
1687 break;
1688 case LINUX_PR_SET_NAME:
1689 /*
1690 * To be on the safe side we need to make sure to not
1691 * overflow the size a linux program expects. We already
1692 * do this here in the copyin, so that we don't need to
1693 * check on copyout.
1694 */
1695 max_size = MIN(sizeof(comm), sizeof(p->p_comm));
1696 error = copyinstr((void *)(register_t)args->arg2, comm,
1697 max_size, NULL);
1698
1699 /* Linux silently truncates the name if it is too long. */
1700 if (error == ENAMETOOLONG) {
1701 /*
1702 * XXX: copyinstr() isn't documented to populate the
1703 * array completely, so do a copyin() to be on the
1704 * safe side. This should be changed in case
1705 * copyinstr() is changed to guarantee this.
1706 */
1707 error = copyin((void *)(register_t)args->arg2, comm,
1708 max_size - 1);
1709 comm[max_size - 1] = '\0';
1710 }
1711 if (error)
1712 return (error);
1713
1714 PROC_LOCK(p);
1715 strlcpy(p->p_comm, comm, sizeof(p->p_comm));
1716 PROC_UNLOCK(p);
1717 break;
1718 case LINUX_PR_GET_NAME:
1719 PROC_LOCK(p);
1720 strlcpy(comm, p->p_comm, sizeof(comm));
1721 PROC_UNLOCK(p);
1722 error = copyout(comm, (void *)(register_t)args->arg2,
1723 strlen(comm) + 1);
1724 break;
1725 default:
1726 error = EINVAL;
1727 break;
1728 }
1729
1730 return (error);
1731 }
1732
1733 /*
1734 * Get affinity of a process.
1735 */
1736 int
1737 linux_sched_getaffinity(struct thread *td,
1738 struct linux_sched_getaffinity_args *args)
1739 {
1740 int error;
1741 struct cpuset_getaffinity_args cga;
1742
1743 #ifdef DEBUG
1744 if (ldebug(sched_getaffinity))
1745 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid,
1746 args->len);
1747 #endif
1748 if (args->len < sizeof(cpuset_t))
1749 return (EINVAL);
1750
1751 cga.level = CPU_LEVEL_WHICH;
1752 cga.which = CPU_WHICH_PID;
1753 cga.id = args->pid;
1754 cga.cpusetsize = sizeof(cpuset_t);
1755 cga.mask = (cpuset_t *) args->user_mask_ptr;
1756
1757 if ((error = cpuset_getaffinity(td, &cga)) == 0)
1758 td->td_retval[0] = sizeof(cpuset_t);
1759
1760 return (error);
1761 }
1762
1763 /*
1764 * Set affinity of a process.
1765 */
1766 int
1767 linux_sched_setaffinity(struct thread *td,
1768 struct linux_sched_setaffinity_args *args)
1769 {
1770 struct cpuset_setaffinity_args csa;
1771
1772 #ifdef DEBUG
1773 if (ldebug(sched_setaffinity))
1774 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid,
1775 args->len);
1776 #endif
1777 if (args->len < sizeof(cpuset_t))
1778 return (EINVAL);
1779
1780 csa.level = CPU_LEVEL_WHICH;
1781 csa.which = CPU_WHICH_PID;
1782 csa.id = args->pid;
1783 csa.cpusetsize = sizeof(cpuset_t);
1784 csa.mask = (cpuset_t *) args->user_mask_ptr;
1785
1786 return (cpuset_setaffinity(td, &csa));
1787 }
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