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: releng/10.0/sys/compat/linux/linux_misc.c 255426 2013-09-09 18:11:59Z jhb $");
32
33 #include "opt_compat.h"
34 #include "opt_kdtrace.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/racct.h>
55 #include <sys/resourcevar.h>
56 #include <sys/sched.h>
57 #include <sys/sdt.h>
58 #include <sys/signalvar.h>
59 #include <sys/stat.h>
60 #include <sys/syscallsubr.h>
61 #include <sys/sysctl.h>
62 #include <sys/sysproto.h>
63 #include <sys/systm.h>
64 #include <sys/time.h>
65 #include <sys/vmmeter.h>
66 #include <sys/vnode.h>
67 #include <sys/wait.h>
68 #include <sys/cpuset.h>
69
70 #include <security/mac/mac_framework.h>
71
72 #include <vm/vm.h>
73 #include <vm/pmap.h>
74 #include <vm/vm_kern.h>
75 #include <vm/vm_map.h>
76 #include <vm/vm_extern.h>
77 #include <vm/vm_object.h>
78 #include <vm/swap_pager.h>
79
80 #ifdef COMPAT_LINUX32
81 #include <machine/../linux32/linux.h>
82 #include <machine/../linux32/linux32_proto.h>
83 #else
84 #include <machine/../linux/linux.h>
85 #include <machine/../linux/linux_proto.h>
86 #endif
87
88 #include <compat/linux/linux_dtrace.h>
89 #include <compat/linux/linux_file.h>
90 #include <compat/linux/linux_mib.h>
91 #include <compat/linux/linux_signal.h>
92 #include <compat/linux/linux_util.h>
93 #include <compat/linux/linux_sysproto.h>
94 #include <compat/linux/linux_emul.h>
95 #include <compat/linux/linux_misc.h>
96
97 /* DTrace init */
98 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
99
100 /* Linuxulator-global DTrace probes */
101 LIN_SDT_PROBE_DECLARE(locks, emul_lock, locked);
102 LIN_SDT_PROBE_DECLARE(locks, emul_lock, unlock);
103 LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, locked);
104 LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, unlock);
105 LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, locked);
106 LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, unlock);
107
108 int stclohz; /* Statistics clock frequency */
109
110 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
111 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
112 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
113 RLIMIT_MEMLOCK, RLIMIT_AS
114 };
115
116 struct l_sysinfo {
117 l_long uptime; /* Seconds since boot */
118 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */
119 #define LINUX_SYSINFO_LOADS_SCALE 65536
120 l_ulong totalram; /* Total usable main memory size */
121 l_ulong freeram; /* Available memory size */
122 l_ulong sharedram; /* Amount of shared memory */
123 l_ulong bufferram; /* Memory used by buffers */
124 l_ulong totalswap; /* Total swap space size */
125 l_ulong freeswap; /* swap space still available */
126 l_ushort procs; /* Number of current processes */
127 l_ushort pads;
128 l_ulong totalbig;
129 l_ulong freebig;
130 l_uint mem_unit;
131 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */
132 };
133 int
134 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
135 {
136 struct l_sysinfo sysinfo;
137 vm_object_t object;
138 int i, j;
139 struct timespec ts;
140
141 getnanouptime(&ts);
142 if (ts.tv_nsec != 0)
143 ts.tv_sec++;
144 sysinfo.uptime = ts.tv_sec;
145
146 /* Use the information from the mib to get our load averages */
147 for (i = 0; i < 3; i++)
148 sysinfo.loads[i] = averunnable.ldavg[i] *
149 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
150
151 sysinfo.totalram = physmem * PAGE_SIZE;
152 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
153
154 sysinfo.sharedram = 0;
155 mtx_lock(&vm_object_list_mtx);
156 TAILQ_FOREACH(object, &vm_object_list, object_list)
157 if (object->shadow_count > 1)
158 sysinfo.sharedram += object->resident_page_count;
159 mtx_unlock(&vm_object_list_mtx);
160
161 sysinfo.sharedram *= PAGE_SIZE;
162 sysinfo.bufferram = 0;
163
164 swap_pager_status(&i, &j);
165 sysinfo.totalswap = i * PAGE_SIZE;
166 sysinfo.freeswap = (i - j) * PAGE_SIZE;
167
168 sysinfo.procs = nprocs;
169
170 /* The following are only present in newer Linux kernels. */
171 sysinfo.totalbig = 0;
172 sysinfo.freebig = 0;
173 sysinfo.mem_unit = 1;
174
175 return (copyout(&sysinfo, args->info, sizeof(sysinfo)));
176 }
177
178 int
179 linux_alarm(struct thread *td, struct linux_alarm_args *args)
180 {
181 struct itimerval it, old_it;
182 u_int secs;
183 int error;
184
185 #ifdef DEBUG
186 if (ldebug(alarm))
187 printf(ARGS(alarm, "%u"), args->secs);
188 #endif
189
190 secs = args->secs;
191
192 if (secs > INT_MAX)
193 secs = INT_MAX;
194
195 it.it_value.tv_sec = (long) secs;
196 it.it_value.tv_usec = 0;
197 it.it_interval.tv_sec = 0;
198 it.it_interval.tv_usec = 0;
199 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
200 if (error)
201 return (error);
202 if (timevalisset(&old_it.it_value)) {
203 if (old_it.it_value.tv_usec != 0)
204 old_it.it_value.tv_sec++;
205 td->td_retval[0] = old_it.it_value.tv_sec;
206 }
207 return (0);
208 }
209
210 int
211 linux_brk(struct thread *td, struct linux_brk_args *args)
212 {
213 struct vmspace *vm = td->td_proc->p_vmspace;
214 vm_offset_t new, old;
215 struct obreak_args /* {
216 char * nsize;
217 } */ tmp;
218
219 #ifdef DEBUG
220 if (ldebug(brk))
221 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
222 #endif
223 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
224 new = (vm_offset_t)args->dsend;
225 tmp.nsize = (char *)new;
226 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp))
227 td->td_retval[0] = (long)new;
228 else
229 td->td_retval[0] = (long)old;
230
231 return (0);
232 }
233
234 #if defined(__i386__)
235 /* XXX: what about amd64/linux32? */
236
237 int
238 linux_uselib(struct thread *td, struct linux_uselib_args *args)
239 {
240 struct nameidata ni;
241 struct vnode *vp;
242 struct exec *a_out;
243 struct vattr attr;
244 vm_offset_t vmaddr;
245 unsigned long file_offset;
246 unsigned long bss_size;
247 char *library;
248 ssize_t aresid;
249 int error, locked, writecount;
250
251 LCONVPATHEXIST(td, args->library, &library);
252
253 #ifdef DEBUG
254 if (ldebug(uselib))
255 printf(ARGS(uselib, "%s"), library);
256 #endif
257
258 a_out = NULL;
259 locked = 0;
260 vp = NULL;
261
262 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1,
263 UIO_SYSSPACE, library, td);
264 error = namei(&ni);
265 LFREEPATH(library);
266 if (error)
267 goto cleanup;
268
269 vp = ni.ni_vp;
270 NDFREE(&ni, NDF_ONLY_PNBUF);
271
272 /*
273 * From here on down, we have a locked vnode that must be unlocked.
274 * XXX: The code below largely duplicates exec_check_permissions().
275 */
276 locked = 1;
277
278 /* Writable? */
279 error = VOP_GET_WRITECOUNT(vp, &writecount);
280 if (error != 0)
281 goto cleanup;
282 if (writecount != 0) {
283 error = ETXTBSY;
284 goto cleanup;
285 }
286
287 /* Executable? */
288 error = VOP_GETATTR(vp, &attr, td->td_ucred);
289 if (error)
290 goto cleanup;
291
292 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
293 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
294 /* EACCESS is what exec(2) returns. */
295 error = ENOEXEC;
296 goto cleanup;
297 }
298
299 /* Sensible size? */
300 if (attr.va_size == 0) {
301 error = ENOEXEC;
302 goto cleanup;
303 }
304
305 /* Can we access it? */
306 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
307 if (error)
308 goto cleanup;
309
310 /*
311 * XXX: This should use vn_open() so that it is properly authorized,
312 * and to reduce code redundancy all over the place here.
313 * XXX: Not really, it duplicates far more of exec_check_permissions()
314 * than vn_open().
315 */
316 #ifdef MAC
317 error = mac_vnode_check_open(td->td_ucred, vp, VREAD);
318 if (error)
319 goto cleanup;
320 #endif
321 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
322 if (error)
323 goto cleanup;
324
325 /* Pull in executable header into exec_map */
326 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE,
327 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
328 if (error)
329 goto cleanup;
330
331 /* Is it a Linux binary ? */
332 if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
333 error = ENOEXEC;
334 goto cleanup;
335 }
336
337 /*
338 * While we are here, we should REALLY do some more checks
339 */
340
341 /* Set file/virtual offset based on a.out variant. */
342 switch ((int)(a_out->a_magic & 0xffff)) {
343 case 0413: /* ZMAGIC */
344 file_offset = 1024;
345 break;
346 case 0314: /* QMAGIC */
347 file_offset = 0;
348 break;
349 default:
350 error = ENOEXEC;
351 goto cleanup;
352 }
353
354 bss_size = round_page(a_out->a_bss);
355
356 /* Check various fields in header for validity/bounds. */
357 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
358 error = ENOEXEC;
359 goto cleanup;
360 }
361
362 /* text + data can't exceed file size */
363 if (a_out->a_data + a_out->a_text > attr.va_size) {
364 error = EFAULT;
365 goto cleanup;
366 }
367
368 /*
369 * text/data/bss must not exceed limits
370 * XXX - this is not complete. it should check current usage PLUS
371 * the resources needed by this library.
372 */
373 PROC_LOCK(td->td_proc);
374 if (a_out->a_text > maxtsiz ||
375 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) ||
376 racct_set(td->td_proc, RACCT_DATA, a_out->a_data +
377 bss_size) != 0) {
378 PROC_UNLOCK(td->td_proc);
379 error = ENOMEM;
380 goto cleanup;
381 }
382 PROC_UNLOCK(td->td_proc);
383
384 /*
385 * Prevent more writers.
386 * XXX: Note that if any of the VM operations fail below we don't
387 * clear this flag.
388 */
389 VOP_SET_TEXT(vp);
390
391 /*
392 * Lock no longer needed
393 */
394 locked = 0;
395 VOP_UNLOCK(vp, 0);
396
397 /*
398 * Check if file_offset page aligned. Currently we cannot handle
399 * misalinged file offsets, and so we read in the entire image
400 * (what a waste).
401 */
402 if (file_offset & PAGE_MASK) {
403 #ifdef DEBUG
404 printf("uselib: Non page aligned binary %lu\n", file_offset);
405 #endif
406 /* Map text+data read/write/execute */
407
408 /* a_entry is the load address and is page aligned */
409 vmaddr = trunc_page(a_out->a_entry);
410
411 /* get anon user mapping, read+write+execute */
412 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
413 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE,
414 VM_PROT_ALL, VM_PROT_ALL, 0);
415 if (error)
416 goto cleanup;
417
418 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset,
419 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0,
420 td->td_ucred, NOCRED, &aresid, td);
421 if (error != 0)
422 goto cleanup;
423 if (aresid != 0) {
424 error = ENOEXEC;
425 goto cleanup;
426 }
427 } else {
428 #ifdef DEBUG
429 printf("uselib: Page aligned binary %lu\n", file_offset);
430 #endif
431 /*
432 * for QMAGIC, a_entry is 20 bytes beyond the load address
433 * to skip the executable header
434 */
435 vmaddr = trunc_page(a_out->a_entry);
436
437 /*
438 * Map it all into the process's space as a single
439 * copy-on-write "data" segment.
440 */
441 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
442 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
443 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
444 if (error)
445 goto cleanup;
446 }
447 #ifdef DEBUG
448 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
449 ((long *)vmaddr)[1]);
450 #endif
451 if (bss_size != 0) {
452 /* Calculate BSS start address */
453 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
454 a_out->a_data;
455
456 /* allocate some 'anon' space */
457 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
458 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL,
459 VM_PROT_ALL, 0);
460 if (error)
461 goto cleanup;
462 }
463
464 cleanup:
465 /* Unlock vnode if needed */
466 if (locked)
467 VOP_UNLOCK(vp, 0);
468
469 /* Release the temporary mapping. */
470 if (a_out)
471 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE);
472
473 return (error);
474 }
475
476 #endif /* __i386__ */
477
478 int
479 linux_select(struct thread *td, struct linux_select_args *args)
480 {
481 l_timeval ltv;
482 struct timeval tv0, tv1, utv, *tvp;
483 int error;
484
485 #ifdef DEBUG
486 if (ldebug(select))
487 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
488 (void *)args->readfds, (void *)args->writefds,
489 (void *)args->exceptfds, (void *)args->timeout);
490 #endif
491
492 /*
493 * Store current time for computation of the amount of
494 * time left.
495 */
496 if (args->timeout) {
497 if ((error = copyin(args->timeout, <v, sizeof(ltv))))
498 goto select_out;
499 utv.tv_sec = ltv.tv_sec;
500 utv.tv_usec = ltv.tv_usec;
501 #ifdef DEBUG
502 if (ldebug(select))
503 printf(LMSG("incoming timeout (%jd/%ld)"),
504 (intmax_t)utv.tv_sec, utv.tv_usec);
505 #endif
506
507 if (itimerfix(&utv)) {
508 /*
509 * The timeval was invalid. Convert it to something
510 * valid that will act as it does under Linux.
511 */
512 utv.tv_sec += utv.tv_usec / 1000000;
513 utv.tv_usec %= 1000000;
514 if (utv.tv_usec < 0) {
515 utv.tv_sec -= 1;
516 utv.tv_usec += 1000000;
517 }
518 if (utv.tv_sec < 0)
519 timevalclear(&utv);
520 }
521 microtime(&tv0);
522 tvp = &utv;
523 } else
524 tvp = NULL;
525
526 error = kern_select(td, args->nfds, args->readfds, args->writefds,
527 args->exceptfds, tvp, sizeof(l_int) * 8);
528
529 #ifdef DEBUG
530 if (ldebug(select))
531 printf(LMSG("real select returns %d"), error);
532 #endif
533 if (error)
534 goto select_out;
535
536 if (args->timeout) {
537 if (td->td_retval[0]) {
538 /*
539 * Compute how much time was left of the timeout,
540 * by subtracting the current time and the time
541 * before we started the call, and subtracting
542 * that result from the user-supplied value.
543 */
544 microtime(&tv1);
545 timevalsub(&tv1, &tv0);
546 timevalsub(&utv, &tv1);
547 if (utv.tv_sec < 0)
548 timevalclear(&utv);
549 } else
550 timevalclear(&utv);
551 #ifdef DEBUG
552 if (ldebug(select))
553 printf(LMSG("outgoing timeout (%jd/%ld)"),
554 (intmax_t)utv.tv_sec, utv.tv_usec);
555 #endif
556 ltv.tv_sec = utv.tv_sec;
557 ltv.tv_usec = utv.tv_usec;
558 if ((error = copyout(<v, args->timeout, sizeof(ltv))))
559 goto select_out;
560 }
561
562 select_out:
563 #ifdef DEBUG
564 if (ldebug(select))
565 printf(LMSG("select_out -> %d"), error);
566 #endif
567 return (error);
568 }
569
570 int
571 linux_mremap(struct thread *td, struct linux_mremap_args *args)
572 {
573 struct munmap_args /* {
574 void *addr;
575 size_t len;
576 } */ bsd_args;
577 int error = 0;
578
579 #ifdef DEBUG
580 if (ldebug(mremap))
581 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
582 (void *)(uintptr_t)args->addr,
583 (unsigned long)args->old_len,
584 (unsigned long)args->new_len,
585 (unsigned long)args->flags);
586 #endif
587
588 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
589 td->td_retval[0] = 0;
590 return (EINVAL);
591 }
592
593 /*
594 * Check for the page alignment.
595 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
596 */
597 if (args->addr & PAGE_MASK) {
598 td->td_retval[0] = 0;
599 return (EINVAL);
600 }
601
602 args->new_len = round_page(args->new_len);
603 args->old_len = round_page(args->old_len);
604
605 if (args->new_len > args->old_len) {
606 td->td_retval[0] = 0;
607 return (ENOMEM);
608 }
609
610 if (args->new_len < args->old_len) {
611 bsd_args.addr =
612 (caddr_t)((uintptr_t)args->addr + args->new_len);
613 bsd_args.len = args->old_len - args->new_len;
614 error = sys_munmap(td, &bsd_args);
615 }
616
617 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
618 return (error);
619 }
620
621 #define LINUX_MS_ASYNC 0x0001
622 #define LINUX_MS_INVALIDATE 0x0002
623 #define LINUX_MS_SYNC 0x0004
624
625 int
626 linux_msync(struct thread *td, struct linux_msync_args *args)
627 {
628 struct msync_args bsd_args;
629
630 bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
631 bsd_args.len = (uintptr_t)args->len;
632 bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
633
634 return (sys_msync(td, &bsd_args));
635 }
636
637 int
638 linux_time(struct thread *td, struct linux_time_args *args)
639 {
640 struct timeval tv;
641 l_time_t tm;
642 int error;
643
644 #ifdef DEBUG
645 if (ldebug(time))
646 printf(ARGS(time, "*"));
647 #endif
648
649 microtime(&tv);
650 tm = tv.tv_sec;
651 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
652 return (error);
653 td->td_retval[0] = tm;
654 return (0);
655 }
656
657 struct l_times_argv {
658 l_clock_t tms_utime;
659 l_clock_t tms_stime;
660 l_clock_t tms_cutime;
661 l_clock_t tms_cstime;
662 };
663
664
665 /*
666 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value.
667 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK
668 * auxiliary vector entry.
669 */
670 #define CLK_TCK 100
671
672 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
673 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz))
674
675 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \
676 CONVNTCK(r) : CONVOTCK(r))
677
678 int
679 linux_times(struct thread *td, struct linux_times_args *args)
680 {
681 struct timeval tv, utime, stime, cutime, cstime;
682 struct l_times_argv tms;
683 struct proc *p;
684 int error;
685
686 #ifdef DEBUG
687 if (ldebug(times))
688 printf(ARGS(times, "*"));
689 #endif
690
691 if (args->buf != NULL) {
692 p = td->td_proc;
693 PROC_LOCK(p);
694 PROC_SLOCK(p);
695 calcru(p, &utime, &stime);
696 PROC_SUNLOCK(p);
697 calccru(p, &cutime, &cstime);
698 PROC_UNLOCK(p);
699
700 tms.tms_utime = CONVTCK(utime);
701 tms.tms_stime = CONVTCK(stime);
702
703 tms.tms_cutime = CONVTCK(cutime);
704 tms.tms_cstime = CONVTCK(cstime);
705
706 if ((error = copyout(&tms, args->buf, sizeof(tms))))
707 return (error);
708 }
709
710 microuptime(&tv);
711 td->td_retval[0] = (int)CONVTCK(tv);
712 return (0);
713 }
714
715 int
716 linux_newuname(struct thread *td, struct linux_newuname_args *args)
717 {
718 struct l_new_utsname utsname;
719 char osname[LINUX_MAX_UTSNAME];
720 char osrelease[LINUX_MAX_UTSNAME];
721 char *p;
722
723 #ifdef DEBUG
724 if (ldebug(newuname))
725 printf(ARGS(newuname, "*"));
726 #endif
727
728 linux_get_osname(td, osname);
729 linux_get_osrelease(td, osrelease);
730
731 bzero(&utsname, sizeof(utsname));
732 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
733 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
734 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME);
735 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
736 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
737 for (p = utsname.version; *p != '\0'; ++p)
738 if (*p == '\n') {
739 *p = '\0';
740 break;
741 }
742 strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME);
743
744 return (copyout(&utsname, args->buf, sizeof(utsname)));
745 }
746
747 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
748 struct l_utimbuf {
749 l_time_t l_actime;
750 l_time_t l_modtime;
751 };
752
753 int
754 linux_utime(struct thread *td, struct linux_utime_args *args)
755 {
756 struct timeval tv[2], *tvp;
757 struct l_utimbuf lut;
758 char *fname;
759 int error;
760
761 LCONVPATHEXIST(td, args->fname, &fname);
762
763 #ifdef DEBUG
764 if (ldebug(utime))
765 printf(ARGS(utime, "%s, *"), fname);
766 #endif
767
768 if (args->times) {
769 if ((error = copyin(args->times, &lut, sizeof lut))) {
770 LFREEPATH(fname);
771 return (error);
772 }
773 tv[0].tv_sec = lut.l_actime;
774 tv[0].tv_usec = 0;
775 tv[1].tv_sec = lut.l_modtime;
776 tv[1].tv_usec = 0;
777 tvp = tv;
778 } else
779 tvp = NULL;
780
781 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
782 LFREEPATH(fname);
783 return (error);
784 }
785
786 int
787 linux_utimes(struct thread *td, struct linux_utimes_args *args)
788 {
789 l_timeval ltv[2];
790 struct timeval tv[2], *tvp = NULL;
791 char *fname;
792 int error;
793
794 LCONVPATHEXIST(td, args->fname, &fname);
795
796 #ifdef DEBUG
797 if (ldebug(utimes))
798 printf(ARGS(utimes, "%s, *"), fname);
799 #endif
800
801 if (args->tptr != NULL) {
802 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
803 LFREEPATH(fname);
804 return (error);
805 }
806 tv[0].tv_sec = ltv[0].tv_sec;
807 tv[0].tv_usec = ltv[0].tv_usec;
808 tv[1].tv_sec = ltv[1].tv_sec;
809 tv[1].tv_usec = ltv[1].tv_usec;
810 tvp = tv;
811 }
812
813 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
814 LFREEPATH(fname);
815 return (error);
816 }
817
818 int
819 linux_futimesat(struct thread *td, struct linux_futimesat_args *args)
820 {
821 l_timeval ltv[2];
822 struct timeval tv[2], *tvp = NULL;
823 char *fname;
824 int error, dfd;
825
826 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
827 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd);
828
829 #ifdef DEBUG
830 if (ldebug(futimesat))
831 printf(ARGS(futimesat, "%s, *"), fname);
832 #endif
833
834 if (args->utimes != NULL) {
835 if ((error = copyin(args->utimes, ltv, sizeof ltv))) {
836 LFREEPATH(fname);
837 return (error);
838 }
839 tv[0].tv_sec = ltv[0].tv_sec;
840 tv[0].tv_usec = ltv[0].tv_usec;
841 tv[1].tv_sec = ltv[1].tv_sec;
842 tv[1].tv_usec = ltv[1].tv_usec;
843 tvp = tv;
844 }
845
846 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
847 LFREEPATH(fname);
848 return (error);
849 }
850 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
851
852 int
853 linux_common_wait(struct thread *td, int pid, int *status,
854 int options, struct rusage *ru)
855 {
856 int error, tmpstat;
857
858 error = kern_wait(td, pid, &tmpstat, options, ru);
859 if (error)
860 return (error);
861
862 if (status) {
863 tmpstat &= 0xffff;
864 if (WIFSIGNALED(tmpstat))
865 tmpstat = (tmpstat & 0xffffff80) |
866 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
867 else if (WIFSTOPPED(tmpstat))
868 tmpstat = (tmpstat & 0xffff00ff) |
869 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
870 error = copyout(&tmpstat, status, sizeof(int));
871 }
872
873 return (error);
874 }
875
876 int
877 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
878 {
879 int options;
880
881 #ifdef DEBUG
882 if (ldebug(waitpid))
883 printf(ARGS(waitpid, "%d, %p, %d"),
884 args->pid, (void *)args->status, args->options);
885 #endif
886 /*
887 * this is necessary because the test in kern_wait doesn't work
888 * because we mess with the options here
889 */
890 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
891 return (EINVAL);
892
893 options = (args->options & (WNOHANG | WUNTRACED));
894 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
895 if (args->options & __WCLONE)
896 options |= WLINUXCLONE;
897
898 return (linux_common_wait(td, args->pid, args->status, options, NULL));
899 }
900
901
902 int
903 linux_mknod(struct thread *td, struct linux_mknod_args *args)
904 {
905 char *path;
906 int error;
907
908 LCONVPATHCREAT(td, args->path, &path);
909
910 #ifdef DEBUG
911 if (ldebug(mknod))
912 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
913 #endif
914
915 switch (args->mode & S_IFMT) {
916 case S_IFIFO:
917 case S_IFSOCK:
918 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
919 break;
920
921 case S_IFCHR:
922 case S_IFBLK:
923 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
924 args->dev);
925 break;
926
927 case S_IFDIR:
928 error = EPERM;
929 break;
930
931 case 0:
932 args->mode |= S_IFREG;
933 /* FALLTHROUGH */
934 case S_IFREG:
935 error = kern_open(td, path, UIO_SYSSPACE,
936 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
937 if (error == 0)
938 kern_close(td, td->td_retval[0]);
939 break;
940
941 default:
942 error = EINVAL;
943 break;
944 }
945 LFREEPATH(path);
946 return (error);
947 }
948
949 int
950 linux_mknodat(struct thread *td, struct linux_mknodat_args *args)
951 {
952 char *path;
953 int error, dfd;
954
955 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
956 LCONVPATHCREAT_AT(td, args->filename, &path, dfd);
957
958 #ifdef DEBUG
959 if (ldebug(mknodat))
960 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev);
961 #endif
962
963 switch (args->mode & S_IFMT) {
964 case S_IFIFO:
965 case S_IFSOCK:
966 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode);
967 break;
968
969 case S_IFCHR:
970 case S_IFBLK:
971 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode,
972 args->dev);
973 break;
974
975 case S_IFDIR:
976 error = EPERM;
977 break;
978
979 case 0:
980 args->mode |= S_IFREG;
981 /* FALLTHROUGH */
982 case S_IFREG:
983 error = kern_openat(td, dfd, path, UIO_SYSSPACE,
984 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
985 if (error == 0)
986 kern_close(td, td->td_retval[0]);
987 break;
988
989 default:
990 error = EINVAL;
991 break;
992 }
993 LFREEPATH(path);
994 return (error);
995 }
996
997 /*
998 * UGH! This is just about the dumbest idea I've ever heard!!
999 */
1000 int
1001 linux_personality(struct thread *td, struct linux_personality_args *args)
1002 {
1003 #ifdef DEBUG
1004 if (ldebug(personality))
1005 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
1006 #endif
1007 if (args->per != 0)
1008 return (EINVAL);
1009
1010 /* Yes Jim, it's still a Linux... */
1011 td->td_retval[0] = 0;
1012 return (0);
1013 }
1014
1015 struct l_itimerval {
1016 l_timeval it_interval;
1017 l_timeval it_value;
1018 };
1019
1020 #define B2L_ITIMERVAL(bip, lip) \
1021 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \
1022 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \
1023 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \
1024 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
1025
1026 int
1027 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
1028 {
1029 int error;
1030 struct l_itimerval ls;
1031 struct itimerval aitv, oitv;
1032
1033 #ifdef DEBUG
1034 if (ldebug(setitimer))
1035 printf(ARGS(setitimer, "%p, %p"),
1036 (void *)uap->itv, (void *)uap->oitv);
1037 #endif
1038
1039 if (uap->itv == NULL) {
1040 uap->itv = uap->oitv;
1041 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
1042 }
1043
1044 error = copyin(uap->itv, &ls, sizeof(ls));
1045 if (error != 0)
1046 return (error);
1047 B2L_ITIMERVAL(&aitv, &ls);
1048 #ifdef DEBUG
1049 if (ldebug(setitimer)) {
1050 printf("setitimer: value: sec: %jd, usec: %ld\n",
1051 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
1052 printf("setitimer: interval: sec: %jd, usec: %ld\n",
1053 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
1054 }
1055 #endif
1056 error = kern_setitimer(td, uap->which, &aitv, &oitv);
1057 if (error != 0 || uap->oitv == NULL)
1058 return (error);
1059 B2L_ITIMERVAL(&ls, &oitv);
1060
1061 return (copyout(&ls, uap->oitv, sizeof(ls)));
1062 }
1063
1064 int
1065 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
1066 {
1067 int error;
1068 struct l_itimerval ls;
1069 struct itimerval aitv;
1070
1071 #ifdef DEBUG
1072 if (ldebug(getitimer))
1073 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
1074 #endif
1075 error = kern_getitimer(td, uap->which, &aitv);
1076 if (error != 0)
1077 return (error);
1078 B2L_ITIMERVAL(&ls, &aitv);
1079 return (copyout(&ls, uap->itv, sizeof(ls)));
1080 }
1081
1082 int
1083 linux_nice(struct thread *td, struct linux_nice_args *args)
1084 {
1085 struct setpriority_args bsd_args;
1086
1087 bsd_args.which = PRIO_PROCESS;
1088 bsd_args.who = 0; /* current process */
1089 bsd_args.prio = args->inc;
1090 return (sys_setpriority(td, &bsd_args));
1091 }
1092
1093 int
1094 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
1095 {
1096 struct ucred *newcred, *oldcred;
1097 l_gid_t *linux_gidset;
1098 gid_t *bsd_gidset;
1099 int ngrp, error;
1100 struct proc *p;
1101
1102 ngrp = args->gidsetsize;
1103 if (ngrp < 0 || ngrp >= ngroups_max + 1)
1104 return (EINVAL);
1105 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
1106 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
1107 if (error)
1108 goto out;
1109 newcred = crget();
1110 p = td->td_proc;
1111 PROC_LOCK(p);
1112 oldcred = crcopysafe(p, newcred);
1113
1114 /*
1115 * cr_groups[0] holds egid. Setting the whole set from
1116 * the supplied set will cause egid to be changed too.
1117 * Keep cr_groups[0] unchanged to prevent that.
1118 */
1119
1120 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
1121 PROC_UNLOCK(p);
1122 crfree(newcred);
1123 goto out;
1124 }
1125
1126 if (ngrp > 0) {
1127 newcred->cr_ngroups = ngrp + 1;
1128
1129 bsd_gidset = newcred->cr_groups;
1130 ngrp--;
1131 while (ngrp >= 0) {
1132 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
1133 ngrp--;
1134 }
1135 } else
1136 newcred->cr_ngroups = 1;
1137
1138 setsugid(p);
1139 p->p_ucred = newcred;
1140 PROC_UNLOCK(p);
1141 crfree(oldcred);
1142 error = 0;
1143 out:
1144 free(linux_gidset, M_TEMP);
1145 return (error);
1146 }
1147
1148 int
1149 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
1150 {
1151 struct ucred *cred;
1152 l_gid_t *linux_gidset;
1153 gid_t *bsd_gidset;
1154 int bsd_gidsetsz, ngrp, error;
1155
1156 cred = td->td_ucred;
1157 bsd_gidset = cred->cr_groups;
1158 bsd_gidsetsz = cred->cr_ngroups - 1;
1159
1160 /*
1161 * cr_groups[0] holds egid. Returning the whole set
1162 * here will cause a duplicate. Exclude cr_groups[0]
1163 * to prevent that.
1164 */
1165
1166 if ((ngrp = args->gidsetsize) == 0) {
1167 td->td_retval[0] = bsd_gidsetsz;
1168 return (0);
1169 }
1170
1171 if (ngrp < bsd_gidsetsz)
1172 return (EINVAL);
1173
1174 ngrp = 0;
1175 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
1176 M_TEMP, M_WAITOK);
1177 while (ngrp < bsd_gidsetsz) {
1178 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1179 ngrp++;
1180 }
1181
1182 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t));
1183 free(linux_gidset, M_TEMP);
1184 if (error)
1185 return (error);
1186
1187 td->td_retval[0] = ngrp;
1188 return (0);
1189 }
1190
1191 int
1192 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
1193 {
1194 struct rlimit bsd_rlim;
1195 struct l_rlimit rlim;
1196 u_int which;
1197 int error;
1198
1199 #ifdef DEBUG
1200 if (ldebug(setrlimit))
1201 printf(ARGS(setrlimit, "%d, %p"),
1202 args->resource, (void *)args->rlim);
1203 #endif
1204
1205 if (args->resource >= LINUX_RLIM_NLIMITS)
1206 return (EINVAL);
1207
1208 which = linux_to_bsd_resource[args->resource];
1209 if (which == -1)
1210 return (EINVAL);
1211
1212 error = copyin(args->rlim, &rlim, sizeof(rlim));
1213 if (error)
1214 return (error);
1215
1216 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
1217 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
1218 return (kern_setrlimit(td, which, &bsd_rlim));
1219 }
1220
1221 int
1222 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
1223 {
1224 struct l_rlimit rlim;
1225 struct proc *p = td->td_proc;
1226 struct rlimit bsd_rlim;
1227 u_int which;
1228
1229 #ifdef DEBUG
1230 if (ldebug(old_getrlimit))
1231 printf(ARGS(old_getrlimit, "%d, %p"),
1232 args->resource, (void *)args->rlim);
1233 #endif
1234
1235 if (args->resource >= LINUX_RLIM_NLIMITS)
1236 return (EINVAL);
1237
1238 which = linux_to_bsd_resource[args->resource];
1239 if (which == -1)
1240 return (EINVAL);
1241
1242 PROC_LOCK(p);
1243 lim_rlimit(p, which, &bsd_rlim);
1244 PROC_UNLOCK(p);
1245
1246 #ifdef COMPAT_LINUX32
1247 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
1248 if (rlim.rlim_cur == UINT_MAX)
1249 rlim.rlim_cur = INT_MAX;
1250 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
1251 if (rlim.rlim_max == UINT_MAX)
1252 rlim.rlim_max = INT_MAX;
1253 #else
1254 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
1255 if (rlim.rlim_cur == ULONG_MAX)
1256 rlim.rlim_cur = LONG_MAX;
1257 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
1258 if (rlim.rlim_max == ULONG_MAX)
1259 rlim.rlim_max = LONG_MAX;
1260 #endif
1261 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1262 }
1263
1264 int
1265 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
1266 {
1267 struct l_rlimit rlim;
1268 struct proc *p = td->td_proc;
1269 struct rlimit bsd_rlim;
1270 u_int which;
1271
1272 #ifdef DEBUG
1273 if (ldebug(getrlimit))
1274 printf(ARGS(getrlimit, "%d, %p"),
1275 args->resource, (void *)args->rlim);
1276 #endif
1277
1278 if (args->resource >= LINUX_RLIM_NLIMITS)
1279 return (EINVAL);
1280
1281 which = linux_to_bsd_resource[args->resource];
1282 if (which == -1)
1283 return (EINVAL);
1284
1285 PROC_LOCK(p);
1286 lim_rlimit(p, which, &bsd_rlim);
1287 PROC_UNLOCK(p);
1288
1289 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
1290 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
1291 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1292 }
1293
1294 int
1295 linux_sched_setscheduler(struct thread *td,
1296 struct linux_sched_setscheduler_args *args)
1297 {
1298 struct sched_setscheduler_args bsd;
1299
1300 #ifdef DEBUG
1301 if (ldebug(sched_setscheduler))
1302 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
1303 args->pid, args->policy, (const void *)args->param);
1304 #endif
1305
1306 switch (args->policy) {
1307 case LINUX_SCHED_OTHER:
1308 bsd.policy = SCHED_OTHER;
1309 break;
1310 case LINUX_SCHED_FIFO:
1311 bsd.policy = SCHED_FIFO;
1312 break;
1313 case LINUX_SCHED_RR:
1314 bsd.policy = SCHED_RR;
1315 break;
1316 default:
1317 return (EINVAL);
1318 }
1319
1320 bsd.pid = args->pid;
1321 bsd.param = (struct sched_param *)args->param;
1322 return (sys_sched_setscheduler(td, &bsd));
1323 }
1324
1325 int
1326 linux_sched_getscheduler(struct thread *td,
1327 struct linux_sched_getscheduler_args *args)
1328 {
1329 struct sched_getscheduler_args bsd;
1330 int error;
1331
1332 #ifdef DEBUG
1333 if (ldebug(sched_getscheduler))
1334 printf(ARGS(sched_getscheduler, "%d"), args->pid);
1335 #endif
1336
1337 bsd.pid = args->pid;
1338 error = sys_sched_getscheduler(td, &bsd);
1339
1340 switch (td->td_retval[0]) {
1341 case SCHED_OTHER:
1342 td->td_retval[0] = LINUX_SCHED_OTHER;
1343 break;
1344 case SCHED_FIFO:
1345 td->td_retval[0] = LINUX_SCHED_FIFO;
1346 break;
1347 case SCHED_RR:
1348 td->td_retval[0] = LINUX_SCHED_RR;
1349 break;
1350 }
1351
1352 return (error);
1353 }
1354
1355 int
1356 linux_sched_get_priority_max(struct thread *td,
1357 struct linux_sched_get_priority_max_args *args)
1358 {
1359 struct sched_get_priority_max_args bsd;
1360
1361 #ifdef DEBUG
1362 if (ldebug(sched_get_priority_max))
1363 printf(ARGS(sched_get_priority_max, "%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 (sys_sched_get_priority_max(td, &bsd));
1380 }
1381
1382 int
1383 linux_sched_get_priority_min(struct thread *td,
1384 struct linux_sched_get_priority_min_args *args)
1385 {
1386 struct sched_get_priority_min_args bsd;
1387
1388 #ifdef DEBUG
1389 if (ldebug(sched_get_priority_min))
1390 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
1391 #endif
1392
1393 switch (args->policy) {
1394 case LINUX_SCHED_OTHER:
1395 bsd.policy = SCHED_OTHER;
1396 break;
1397 case LINUX_SCHED_FIFO:
1398 bsd.policy = SCHED_FIFO;
1399 break;
1400 case LINUX_SCHED_RR:
1401 bsd.policy = SCHED_RR;
1402 break;
1403 default:
1404 return (EINVAL);
1405 }
1406 return (sys_sched_get_priority_min(td, &bsd));
1407 }
1408
1409 #define REBOOT_CAD_ON 0x89abcdef
1410 #define REBOOT_CAD_OFF 0
1411 #define REBOOT_HALT 0xcdef0123
1412 #define REBOOT_RESTART 0x01234567
1413 #define REBOOT_RESTART2 0xA1B2C3D4
1414 #define REBOOT_POWEROFF 0x4321FEDC
1415 #define REBOOT_MAGIC1 0xfee1dead
1416 #define REBOOT_MAGIC2 0x28121969
1417 #define REBOOT_MAGIC2A 0x05121996
1418 #define REBOOT_MAGIC2B 0x16041998
1419
1420 int
1421 linux_reboot(struct thread *td, struct linux_reboot_args *args)
1422 {
1423 struct reboot_args bsd_args;
1424
1425 #ifdef DEBUG
1426 if (ldebug(reboot))
1427 printf(ARGS(reboot, "0x%x"), args->cmd);
1428 #endif
1429
1430 if (args->magic1 != REBOOT_MAGIC1)
1431 return (EINVAL);
1432
1433 switch (args->magic2) {
1434 case REBOOT_MAGIC2:
1435 case REBOOT_MAGIC2A:
1436 case REBOOT_MAGIC2B:
1437 break;
1438 default:
1439 return (EINVAL);
1440 }
1441
1442 switch (args->cmd) {
1443 case REBOOT_CAD_ON:
1444 case REBOOT_CAD_OFF:
1445 return (priv_check(td, PRIV_REBOOT));
1446 case REBOOT_HALT:
1447 bsd_args.opt = RB_HALT;
1448 break;
1449 case REBOOT_RESTART:
1450 case REBOOT_RESTART2:
1451 bsd_args.opt = 0;
1452 break;
1453 case REBOOT_POWEROFF:
1454 bsd_args.opt = RB_POWEROFF;
1455 break;
1456 default:
1457 return (EINVAL);
1458 }
1459 return (sys_reboot(td, &bsd_args));
1460 }
1461
1462
1463 /*
1464 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1465 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that
1466 * are assumed to be preserved. The following lightweight syscalls fixes
1467 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c
1468 *
1469 * linux_getpid() - MP SAFE
1470 * linux_getgid() - MP SAFE
1471 * linux_getuid() - MP SAFE
1472 */
1473
1474 int
1475 linux_getpid(struct thread *td, struct linux_getpid_args *args)
1476 {
1477 struct linux_emuldata *em;
1478
1479 #ifdef DEBUG
1480 if (ldebug(getpid))
1481 printf(ARGS(getpid, ""));
1482 #endif
1483
1484 if (linux_use26(td)) {
1485 em = em_find(td->td_proc, EMUL_DONTLOCK);
1486 KASSERT(em != NULL, ("getpid: emuldata not found.\n"));
1487 td->td_retval[0] = em->shared->group_pid;
1488 } else {
1489 td->td_retval[0] = td->td_proc->p_pid;
1490 }
1491
1492 return (0);
1493 }
1494
1495 int
1496 linux_gettid(struct thread *td, struct linux_gettid_args *args)
1497 {
1498
1499 #ifdef DEBUG
1500 if (ldebug(gettid))
1501 printf(ARGS(gettid, ""));
1502 #endif
1503
1504 td->td_retval[0] = td->td_proc->p_pid;
1505 return (0);
1506 }
1507
1508
1509 int
1510 linux_getppid(struct thread *td, struct linux_getppid_args *args)
1511 {
1512 struct linux_emuldata *em;
1513 struct proc *p, *pp;
1514
1515 #ifdef DEBUG
1516 if (ldebug(getppid))
1517 printf(ARGS(getppid, ""));
1518 #endif
1519
1520 if (!linux_use26(td)) {
1521 PROC_LOCK(td->td_proc);
1522 td->td_retval[0] = td->td_proc->p_pptr->p_pid;
1523 PROC_UNLOCK(td->td_proc);
1524 return (0);
1525 }
1526
1527 em = em_find(td->td_proc, EMUL_DONTLOCK);
1528
1529 KASSERT(em != NULL, ("getppid: process emuldata not found.\n"));
1530
1531 /* find the group leader */
1532 p = pfind(em->shared->group_pid);
1533
1534 if (p == NULL) {
1535 #ifdef DEBUG
1536 printf(LMSG("parent process not found.\n"));
1537 #endif
1538 return (0);
1539 }
1540
1541 pp = p->p_pptr; /* switch to parent */
1542 PROC_LOCK(pp);
1543 PROC_UNLOCK(p);
1544
1545 /* if its also linux process */
1546 if (pp->p_sysent == &elf_linux_sysvec) {
1547 em = em_find(pp, EMUL_DONTLOCK);
1548 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n"));
1549
1550 td->td_retval[0] = em->shared->group_pid;
1551 } else
1552 td->td_retval[0] = pp->p_pid;
1553
1554 PROC_UNLOCK(pp);
1555
1556 return (0);
1557 }
1558
1559 int
1560 linux_getgid(struct thread *td, struct linux_getgid_args *args)
1561 {
1562
1563 #ifdef DEBUG
1564 if (ldebug(getgid))
1565 printf(ARGS(getgid, ""));
1566 #endif
1567
1568 td->td_retval[0] = td->td_ucred->cr_rgid;
1569 return (0);
1570 }
1571
1572 int
1573 linux_getuid(struct thread *td, struct linux_getuid_args *args)
1574 {
1575
1576 #ifdef DEBUG
1577 if (ldebug(getuid))
1578 printf(ARGS(getuid, ""));
1579 #endif
1580
1581 td->td_retval[0] = td->td_ucred->cr_ruid;
1582 return (0);
1583 }
1584
1585
1586 int
1587 linux_getsid(struct thread *td, struct linux_getsid_args *args)
1588 {
1589 struct getsid_args bsd;
1590
1591 #ifdef DEBUG
1592 if (ldebug(getsid))
1593 printf(ARGS(getsid, "%i"), args->pid);
1594 #endif
1595
1596 bsd.pid = args->pid;
1597 return (sys_getsid(td, &bsd));
1598 }
1599
1600 int
1601 linux_nosys(struct thread *td, struct nosys_args *ignore)
1602 {
1603
1604 return (ENOSYS);
1605 }
1606
1607 int
1608 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
1609 {
1610 struct getpriority_args bsd_args;
1611 int error;
1612
1613 #ifdef DEBUG
1614 if (ldebug(getpriority))
1615 printf(ARGS(getpriority, "%i, %i"), args->which, args->who);
1616 #endif
1617
1618 bsd_args.which = args->which;
1619 bsd_args.who = args->who;
1620 error = sys_getpriority(td, &bsd_args);
1621 td->td_retval[0] = 20 - td->td_retval[0];
1622 return (error);
1623 }
1624
1625 int
1626 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
1627 {
1628 int name[2];
1629
1630 #ifdef DEBUG
1631 if (ldebug(sethostname))
1632 printf(ARGS(sethostname, "*, %i"), args->len);
1633 #endif
1634
1635 name[0] = CTL_KERN;
1636 name[1] = KERN_HOSTNAME;
1637 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
1638 args->len, 0, 0));
1639 }
1640
1641 int
1642 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args)
1643 {
1644 int name[2];
1645
1646 #ifdef DEBUG
1647 if (ldebug(setdomainname))
1648 printf(ARGS(setdomainname, "*, %i"), args->len);
1649 #endif
1650
1651 name[0] = CTL_KERN;
1652 name[1] = KERN_NISDOMAINNAME;
1653 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name,
1654 args->len, 0, 0));
1655 }
1656
1657 int
1658 linux_exit_group(struct thread *td, struct linux_exit_group_args *args)
1659 {
1660 struct linux_emuldata *em;
1661
1662 #ifdef DEBUG
1663 if (ldebug(exit_group))
1664 printf(ARGS(exit_group, "%i"), args->error_code);
1665 #endif
1666
1667 em = em_find(td->td_proc, EMUL_DONTLOCK);
1668 if (em->shared->refs > 1) {
1669 EMUL_SHARED_WLOCK(&emul_shared_lock);
1670 em->shared->flags |= EMUL_SHARED_HASXSTAT;
1671 em->shared->xstat = W_EXITCODE(args->error_code, 0);
1672 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
1673 if (linux_use26(td))
1674 linux_kill_threads(td, SIGKILL);
1675 }
1676
1677 /*
1678 * XXX: we should send a signal to the parent if
1679 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?)
1680 * as it doesnt occur often.
1681 */
1682 exit1(td, W_EXITCODE(args->error_code, 0));
1683
1684 return (0);
1685 }
1686
1687 #define _LINUX_CAPABILITY_VERSION 0x19980330
1688
1689 struct l_user_cap_header {
1690 l_int version;
1691 l_int pid;
1692 };
1693
1694 struct l_user_cap_data {
1695 l_int effective;
1696 l_int permitted;
1697 l_int inheritable;
1698 };
1699
1700 int
1701 linux_capget(struct thread *td, struct linux_capget_args *args)
1702 {
1703 struct l_user_cap_header luch;
1704 struct l_user_cap_data lucd;
1705 int error;
1706
1707 if (args->hdrp == NULL)
1708 return (EFAULT);
1709
1710 error = copyin(args->hdrp, &luch, sizeof(luch));
1711 if (error != 0)
1712 return (error);
1713
1714 if (luch.version != _LINUX_CAPABILITY_VERSION) {
1715 luch.version = _LINUX_CAPABILITY_VERSION;
1716 error = copyout(&luch, args->hdrp, sizeof(luch));
1717 if (error)
1718 return (error);
1719 return (EINVAL);
1720 }
1721
1722 if (luch.pid)
1723 return (EPERM);
1724
1725 if (args->datap) {
1726 /*
1727 * The current implementation doesn't support setting
1728 * a capability (it's essentially a stub) so indicate
1729 * that no capabilities are currently set or available
1730 * to request.
1731 */
1732 bzero (&lucd, sizeof(lucd));
1733 error = copyout(&lucd, args->datap, sizeof(lucd));
1734 }
1735
1736 return (error);
1737 }
1738
1739 int
1740 linux_capset(struct thread *td, struct linux_capset_args *args)
1741 {
1742 struct l_user_cap_header luch;
1743 struct l_user_cap_data lucd;
1744 int error;
1745
1746 if (args->hdrp == NULL || args->datap == NULL)
1747 return (EFAULT);
1748
1749 error = copyin(args->hdrp, &luch, sizeof(luch));
1750 if (error != 0)
1751 return (error);
1752
1753 if (luch.version != _LINUX_CAPABILITY_VERSION) {
1754 luch.version = _LINUX_CAPABILITY_VERSION;
1755 error = copyout(&luch, args->hdrp, sizeof(luch));
1756 if (error)
1757 return (error);
1758 return (EINVAL);
1759 }
1760
1761 if (luch.pid)
1762 return (EPERM);
1763
1764 error = copyin(args->datap, &lucd, sizeof(lucd));
1765 if (error != 0)
1766 return (error);
1767
1768 /* We currently don't support setting any capabilities. */
1769 if (lucd.effective || lucd.permitted || lucd.inheritable) {
1770 linux_msg(td,
1771 "capset effective=0x%x, permitted=0x%x, "
1772 "inheritable=0x%x is not implemented",
1773 (int)lucd.effective, (int)lucd.permitted,
1774 (int)lucd.inheritable);
1775 return (EPERM);
1776 }
1777
1778 return (0);
1779 }
1780
1781 int
1782 linux_prctl(struct thread *td, struct linux_prctl_args *args)
1783 {
1784 int error = 0, max_size;
1785 struct proc *p = td->td_proc;
1786 char comm[LINUX_MAX_COMM_LEN];
1787 struct linux_emuldata *em;
1788 int pdeath_signal;
1789
1790 #ifdef DEBUG
1791 if (ldebug(prctl))
1792 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option,
1793 args->arg2, args->arg3, args->arg4, args->arg5);
1794 #endif
1795
1796 switch (args->option) {
1797 case LINUX_PR_SET_PDEATHSIG:
1798 if (!LINUX_SIG_VALID(args->arg2))
1799 return (EINVAL);
1800 em = em_find(p, EMUL_DOLOCK);
1801 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1802 em->pdeath_signal = args->arg2;
1803 EMUL_UNLOCK(&emul_lock);
1804 break;
1805 case LINUX_PR_GET_PDEATHSIG:
1806 em = em_find(p, EMUL_DOLOCK);
1807 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1808 pdeath_signal = em->pdeath_signal;
1809 EMUL_UNLOCK(&emul_lock);
1810 error = copyout(&pdeath_signal,
1811 (void *)(register_t)args->arg2,
1812 sizeof(pdeath_signal));
1813 break;
1814 case LINUX_PR_GET_KEEPCAPS:
1815 /*
1816 * Indicate that we always clear the effective and
1817 * permitted capability sets when the user id becomes
1818 * non-zero (actually the capability sets are simply
1819 * always zero in the current implementation).
1820 */
1821 td->td_retval[0] = 0;
1822 break;
1823 case LINUX_PR_SET_KEEPCAPS:
1824 /*
1825 * Ignore requests to keep the effective and permitted
1826 * capability sets when the user id becomes non-zero.
1827 */
1828 break;
1829 case LINUX_PR_SET_NAME:
1830 /*
1831 * To be on the safe side we need to make sure to not
1832 * overflow the size a linux program expects. We already
1833 * do this here in the copyin, so that we don't need to
1834 * check on copyout.
1835 */
1836 max_size = MIN(sizeof(comm), sizeof(p->p_comm));
1837 error = copyinstr((void *)(register_t)args->arg2, comm,
1838 max_size, NULL);
1839
1840 /* Linux silently truncates the name if it is too long. */
1841 if (error == ENAMETOOLONG) {
1842 /*
1843 * XXX: copyinstr() isn't documented to populate the
1844 * array completely, so do a copyin() to be on the
1845 * safe side. This should be changed in case
1846 * copyinstr() is changed to guarantee this.
1847 */
1848 error = copyin((void *)(register_t)args->arg2, comm,
1849 max_size - 1);
1850 comm[max_size - 1] = '\0';
1851 }
1852 if (error)
1853 return (error);
1854
1855 PROC_LOCK(p);
1856 strlcpy(p->p_comm, comm, sizeof(p->p_comm));
1857 PROC_UNLOCK(p);
1858 break;
1859 case LINUX_PR_GET_NAME:
1860 PROC_LOCK(p);
1861 strlcpy(comm, p->p_comm, sizeof(comm));
1862 PROC_UNLOCK(p);
1863 error = copyout(comm, (void *)(register_t)args->arg2,
1864 strlen(comm) + 1);
1865 break;
1866 default:
1867 error = EINVAL;
1868 break;
1869 }
1870
1871 return (error);
1872 }
1873
1874 /*
1875 * Get affinity of a process.
1876 */
1877 int
1878 linux_sched_getaffinity(struct thread *td,
1879 struct linux_sched_getaffinity_args *args)
1880 {
1881 int error;
1882 struct cpuset_getaffinity_args cga;
1883
1884 #ifdef DEBUG
1885 if (ldebug(sched_getaffinity))
1886 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid,
1887 args->len);
1888 #endif
1889 if (args->len < sizeof(cpuset_t))
1890 return (EINVAL);
1891
1892 cga.level = CPU_LEVEL_WHICH;
1893 cga.which = CPU_WHICH_PID;
1894 cga.id = args->pid;
1895 cga.cpusetsize = sizeof(cpuset_t);
1896 cga.mask = (cpuset_t *) args->user_mask_ptr;
1897
1898 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0)
1899 td->td_retval[0] = sizeof(cpuset_t);
1900
1901 return (error);
1902 }
1903
1904 /*
1905 * Set affinity of a process.
1906 */
1907 int
1908 linux_sched_setaffinity(struct thread *td,
1909 struct linux_sched_setaffinity_args *args)
1910 {
1911 struct cpuset_setaffinity_args csa;
1912
1913 #ifdef DEBUG
1914 if (ldebug(sched_setaffinity))
1915 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid,
1916 args->len);
1917 #endif
1918 if (args->len < sizeof(cpuset_t))
1919 return (EINVAL);
1920
1921 csa.level = CPU_LEVEL_WHICH;
1922 csa.which = CPU_WHICH_PID;
1923 csa.id = args->pid;
1924 csa.cpusetsize = sizeof(cpuset_t);
1925 csa.mask = (cpuset_t *) args->user_mask_ptr;
1926
1927 return (sys_cpuset_setaffinity(td, &csa));
1928 }
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