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/9.0/sys/compat/linux/linux_misc.c 225617 2011-09-16 13:58:51Z kmacy $");
32
33 #include "opt_compat.h"
34
35 #include <sys/param.h>
36 #include <sys/blist.h>
37 #include <sys/fcntl.h>
38 #if defined(__i386__)
39 #include <sys/imgact_aout.h>
40 #endif
41 #include <sys/jail.h>
42 #include <sys/kernel.h>
43 #include <sys/limits.h>
44 #include <sys/lock.h>
45 #include <sys/malloc.h>
46 #include <sys/mman.h>
47 #include <sys/mount.h>
48 #include <sys/mutex.h>
49 #include <sys/namei.h>
50 #include <sys/priv.h>
51 #include <sys/proc.h>
52 #include <sys/reboot.h>
53 #include <sys/racct.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 #ifdef COMPAT_LINUX32
79 #include <machine/../linux32/linux.h>
80 #include <machine/../linux32/linux32_proto.h>
81 #else
82 #include <machine/../linux/linux.h>
83 #include <machine/../linux/linux_proto.h>
84 #endif
85
86 #include <compat/linux/linux_file.h>
87 #include <compat/linux/linux_mib.h>
88 #include <compat/linux/linux_signal.h>
89 #include <compat/linux/linux_util.h>
90 #include <compat/linux/linux_sysproto.h>
91 #include <compat/linux/linux_emul.h>
92 #include <compat/linux/linux_misc.h>
93
94 int stclohz; /* Statistics clock frequency */
95
96 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
97 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
98 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
99 RLIMIT_MEMLOCK, RLIMIT_AS
100 };
101
102 struct l_sysinfo {
103 l_long uptime; /* Seconds since boot */
104 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */
105 #define LINUX_SYSINFO_LOADS_SCALE 65536
106 l_ulong totalram; /* Total usable main memory size */
107 l_ulong freeram; /* Available memory size */
108 l_ulong sharedram; /* Amount of shared memory */
109 l_ulong bufferram; /* Memory used by buffers */
110 l_ulong totalswap; /* Total swap space size */
111 l_ulong freeswap; /* swap space still available */
112 l_ushort procs; /* Number of current processes */
113 l_ushort pads;
114 l_ulong totalbig;
115 l_ulong freebig;
116 l_uint mem_unit;
117 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */
118 };
119 int
120 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
121 {
122 struct l_sysinfo sysinfo;
123 vm_object_t object;
124 int i, j;
125 struct timespec ts;
126
127 getnanouptime(&ts);
128 if (ts.tv_nsec != 0)
129 ts.tv_sec++;
130 sysinfo.uptime = ts.tv_sec;
131
132 /* Use the information from the mib to get our load averages */
133 for (i = 0; i < 3; i++)
134 sysinfo.loads[i] = averunnable.ldavg[i] *
135 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
136
137 sysinfo.totalram = physmem * PAGE_SIZE;
138 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
139
140 sysinfo.sharedram = 0;
141 mtx_lock(&vm_object_list_mtx);
142 TAILQ_FOREACH(object, &vm_object_list, object_list)
143 if (object->shadow_count > 1)
144 sysinfo.sharedram += object->resident_page_count;
145 mtx_unlock(&vm_object_list_mtx);
146
147 sysinfo.sharedram *= PAGE_SIZE;
148 sysinfo.bufferram = 0;
149
150 swap_pager_status(&i, &j);
151 sysinfo.totalswap = i * PAGE_SIZE;
152 sysinfo.freeswap = (i - j) * PAGE_SIZE;
153
154 sysinfo.procs = nprocs;
155
156 /* The following are only present in newer Linux kernels. */
157 sysinfo.totalbig = 0;
158 sysinfo.freebig = 0;
159 sysinfo.mem_unit = 1;
160
161 return (copyout(&sysinfo, args->info, sizeof(sysinfo)));
162 }
163
164 int
165 linux_alarm(struct thread *td, struct linux_alarm_args *args)
166 {
167 struct itimerval it, old_it;
168 u_int secs;
169 int error;
170
171 #ifdef DEBUG
172 if (ldebug(alarm))
173 printf(ARGS(alarm, "%u"), args->secs);
174 #endif
175
176 secs = args->secs;
177
178 if (secs > INT_MAX)
179 secs = INT_MAX;
180
181 it.it_value.tv_sec = (long) secs;
182 it.it_value.tv_usec = 0;
183 it.it_interval.tv_sec = 0;
184 it.it_interval.tv_usec = 0;
185 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
186 if (error)
187 return (error);
188 if (timevalisset(&old_it.it_value)) {
189 if (old_it.it_value.tv_usec != 0)
190 old_it.it_value.tv_sec++;
191 td->td_retval[0] = old_it.it_value.tv_sec;
192 }
193 return (0);
194 }
195
196 int
197 linux_brk(struct thread *td, struct linux_brk_args *args)
198 {
199 struct vmspace *vm = td->td_proc->p_vmspace;
200 vm_offset_t new, old;
201 struct obreak_args /* {
202 char * nsize;
203 } */ tmp;
204
205 #ifdef DEBUG
206 if (ldebug(brk))
207 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
208 #endif
209 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
210 new = (vm_offset_t)args->dsend;
211 tmp.nsize = (char *)new;
212 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp))
213 td->td_retval[0] = (long)new;
214 else
215 td->td_retval[0] = (long)old;
216
217 return (0);
218 }
219
220 #if defined(__i386__)
221 /* XXX: what about amd64/linux32? */
222
223 int
224 linux_uselib(struct thread *td, struct linux_uselib_args *args)
225 {
226 struct nameidata ni;
227 struct vnode *vp;
228 struct exec *a_out;
229 struct vattr attr;
230 vm_offset_t vmaddr;
231 unsigned long file_offset;
232 vm_offset_t buffer;
233 unsigned long bss_size;
234 char *library;
235 int error;
236 int locked, vfslocked;
237
238 LCONVPATHEXIST(td, args->library, &library);
239
240 #ifdef DEBUG
241 if (ldebug(uselib))
242 printf(ARGS(uselib, "%s"), library);
243 #endif
244
245 a_out = NULL;
246 vfslocked = 0;
247 locked = 0;
248 vp = NULL;
249
250 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
251 UIO_SYSSPACE, library, td);
252 error = namei(&ni);
253 LFREEPATH(library);
254 if (error)
255 goto cleanup;
256
257 vp = ni.ni_vp;
258 vfslocked = NDHASGIANT(&ni);
259 NDFREE(&ni, NDF_ONLY_PNBUF);
260
261 /*
262 * From here on down, we have a locked vnode that must be unlocked.
263 * XXX: The code below largely duplicates exec_check_permissions().
264 */
265 locked = 1;
266
267 /* Writable? */
268 if (vp->v_writecount) {
269 error = ETXTBSY;
270 goto cleanup;
271 }
272
273 /* Executable? */
274 error = VOP_GETATTR(vp, &attr, td->td_ucred);
275 if (error)
276 goto cleanup;
277
278 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
279 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
280 /* EACCESS is what exec(2) returns. */
281 error = ENOEXEC;
282 goto cleanup;
283 }
284
285 /* Sensible size? */
286 if (attr.va_size == 0) {
287 error = ENOEXEC;
288 goto cleanup;
289 }
290
291 /* Can we access it? */
292 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
293 if (error)
294 goto cleanup;
295
296 /*
297 * XXX: This should use vn_open() so that it is properly authorized,
298 * and to reduce code redundancy all over the place here.
299 * XXX: Not really, it duplicates far more of exec_check_permissions()
300 * than vn_open().
301 */
302 #ifdef MAC
303 error = mac_vnode_check_open(td->td_ucred, vp, VREAD);
304 if (error)
305 goto cleanup;
306 #endif
307 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
308 if (error)
309 goto cleanup;
310
311 /* Pull in executable header into kernel_map */
312 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
313 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
314 if (error)
315 goto cleanup;
316
317 /* Is it a Linux binary ? */
318 if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
319 error = ENOEXEC;
320 goto cleanup;
321 }
322
323 /*
324 * While we are here, we should REALLY do some more checks
325 */
326
327 /* Set file/virtual offset based on a.out variant. */
328 switch ((int)(a_out->a_magic & 0xffff)) {
329 case 0413: /* ZMAGIC */
330 file_offset = 1024;
331 break;
332 case 0314: /* QMAGIC */
333 file_offset = 0;
334 break;
335 default:
336 error = ENOEXEC;
337 goto cleanup;
338 }
339
340 bss_size = round_page(a_out->a_bss);
341
342 /* Check various fields in header for validity/bounds. */
343 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
344 error = ENOEXEC;
345 goto cleanup;
346 }
347
348 /* text + data can't exceed file size */
349 if (a_out->a_data + a_out->a_text > attr.va_size) {
350 error = EFAULT;
351 goto cleanup;
352 }
353
354 /*
355 * text/data/bss must not exceed limits
356 * XXX - this is not complete. it should check current usage PLUS
357 * the resources needed by this library.
358 */
359 PROC_LOCK(td->td_proc);
360 if (a_out->a_text > maxtsiz ||
361 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) ||
362 racct_set(td->td_proc, RACCT_DATA, a_out->a_data +
363 bss_size) != 0) {
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);
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);
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, sizeof(l_int) * 8);
526
527 #ifdef DEBUG
528 if (ldebug(select))
529 printf(LMSG("real select returns %d"), error);
530 #endif
531 if (error)
532 goto select_out;
533
534 if (args->timeout) {
535 if (td->td_retval[0]) {
536 /*
537 * Compute how much time was left of the timeout,
538 * by subtracting the current time and the time
539 * before we started the call, and subtracting
540 * that result from the user-supplied value.
541 */
542 microtime(&tv1);
543 timevalsub(&tv1, &tv0);
544 timevalsub(&utv, &tv1);
545 if (utv.tv_sec < 0)
546 timevalclear(&utv);
547 } else
548 timevalclear(&utv);
549 #ifdef DEBUG
550 if (ldebug(select))
551 printf(LMSG("outgoing timeout (%jd/%ld)"),
552 (intmax_t)utv.tv_sec, utv.tv_usec);
553 #endif
554 ltv.tv_sec = utv.tv_sec;
555 ltv.tv_usec = utv.tv_usec;
556 if ((error = copyout(<v, args->timeout, sizeof(ltv))))
557 goto select_out;
558 }
559
560 select_out:
561 #ifdef DEBUG
562 if (ldebug(select))
563 printf(LMSG("select_out -> %d"), error);
564 #endif
565 return (error);
566 }
567
568 int
569 linux_mremap(struct thread *td, struct linux_mremap_args *args)
570 {
571 struct munmap_args /* {
572 void *addr;
573 size_t len;
574 } */ bsd_args;
575 int error = 0;
576
577 #ifdef DEBUG
578 if (ldebug(mremap))
579 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
580 (void *)(uintptr_t)args->addr,
581 (unsigned long)args->old_len,
582 (unsigned long)args->new_len,
583 (unsigned long)args->flags);
584 #endif
585
586 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
587 td->td_retval[0] = 0;
588 return (EINVAL);
589 }
590
591 /*
592 * Check for the page alignment.
593 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
594 */
595 if (args->addr & PAGE_MASK) {
596 td->td_retval[0] = 0;
597 return (EINVAL);
598 }
599
600 args->new_len = round_page(args->new_len);
601 args->old_len = round_page(args->old_len);
602
603 if (args->new_len > args->old_len) {
604 td->td_retval[0] = 0;
605 return (ENOMEM);
606 }
607
608 if (args->new_len < args->old_len) {
609 bsd_args.addr =
610 (caddr_t)((uintptr_t)args->addr + args->new_len);
611 bsd_args.len = args->old_len - args->new_len;
612 error = sys_munmap(td, &bsd_args);
613 }
614
615 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
616 return (error);
617 }
618
619 #define LINUX_MS_ASYNC 0x0001
620 #define LINUX_MS_INVALIDATE 0x0002
621 #define LINUX_MS_SYNC 0x0004
622
623 int
624 linux_msync(struct thread *td, struct linux_msync_args *args)
625 {
626 struct msync_args bsd_args;
627
628 bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
629 bsd_args.len = (uintptr_t)args->len;
630 bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
631
632 return (sys_msync(td, &bsd_args));
633 }
634
635 int
636 linux_time(struct thread *td, struct linux_time_args *args)
637 {
638 struct timeval tv;
639 l_time_t tm;
640 int error;
641
642 #ifdef DEBUG
643 if (ldebug(time))
644 printf(ARGS(time, "*"));
645 #endif
646
647 microtime(&tv);
648 tm = tv.tv_sec;
649 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
650 return (error);
651 td->td_retval[0] = tm;
652 return (0);
653 }
654
655 struct l_times_argv {
656 l_clock_t tms_utime;
657 l_clock_t tms_stime;
658 l_clock_t tms_cutime;
659 l_clock_t tms_cstime;
660 };
661
662
663 /*
664 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value.
665 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK
666 * auxiliary vector entry.
667 */
668 #define CLK_TCK 100
669
670 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
671 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz))
672
673 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \
674 CONVNTCK(r) : CONVOTCK(r))
675
676 int
677 linux_times(struct thread *td, struct linux_times_args *args)
678 {
679 struct timeval tv, utime, stime, cutime, cstime;
680 struct l_times_argv tms;
681 struct proc *p;
682 int error;
683
684 #ifdef DEBUG
685 if (ldebug(times))
686 printf(ARGS(times, "*"));
687 #endif
688
689 if (args->buf != NULL) {
690 p = td->td_proc;
691 PROC_LOCK(p);
692 PROC_SLOCK(p);
693 calcru(p, &utime, &stime);
694 PROC_SUNLOCK(p);
695 calccru(p, &cutime, &cstime);
696 PROC_UNLOCK(p);
697
698 tms.tms_utime = CONVTCK(utime);
699 tms.tms_stime = CONVTCK(stime);
700
701 tms.tms_cutime = CONVTCK(cutime);
702 tms.tms_cstime = CONVTCK(cstime);
703
704 if ((error = copyout(&tms, args->buf, sizeof(tms))))
705 return (error);
706 }
707
708 microuptime(&tv);
709 td->td_retval[0] = (int)CONVTCK(tv);
710 return (0);
711 }
712
713 int
714 linux_newuname(struct thread *td, struct linux_newuname_args *args)
715 {
716 struct l_new_utsname utsname;
717 char osname[LINUX_MAX_UTSNAME];
718 char osrelease[LINUX_MAX_UTSNAME];
719 char *p;
720
721 #ifdef DEBUG
722 if (ldebug(newuname))
723 printf(ARGS(newuname, "*"));
724 #endif
725
726 linux_get_osname(td, osname);
727 linux_get_osrelease(td, osrelease);
728
729 bzero(&utsname, sizeof(utsname));
730 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
731 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
732 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME);
733 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
734 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
735 for (p = utsname.version; *p != '\0'; ++p)
736 if (*p == '\n') {
737 *p = '\0';
738 break;
739 }
740 strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME);
741
742 return (copyout(&utsname, args->buf, sizeof(utsname)));
743 }
744
745 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
746 struct l_utimbuf {
747 l_time_t l_actime;
748 l_time_t l_modtime;
749 };
750
751 int
752 linux_utime(struct thread *td, struct linux_utime_args *args)
753 {
754 struct timeval tv[2], *tvp;
755 struct l_utimbuf lut;
756 char *fname;
757 int error;
758
759 LCONVPATHEXIST(td, args->fname, &fname);
760
761 #ifdef DEBUG
762 if (ldebug(utime))
763 printf(ARGS(utime, "%s, *"), fname);
764 #endif
765
766 if (args->times) {
767 if ((error = copyin(args->times, &lut, sizeof lut))) {
768 LFREEPATH(fname);
769 return (error);
770 }
771 tv[0].tv_sec = lut.l_actime;
772 tv[0].tv_usec = 0;
773 tv[1].tv_sec = lut.l_modtime;
774 tv[1].tv_usec = 0;
775 tvp = tv;
776 } else
777 tvp = NULL;
778
779 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
780 LFREEPATH(fname);
781 return (error);
782 }
783
784 int
785 linux_utimes(struct thread *td, struct linux_utimes_args *args)
786 {
787 l_timeval ltv[2];
788 struct timeval tv[2], *tvp = NULL;
789 char *fname;
790 int error;
791
792 LCONVPATHEXIST(td, args->fname, &fname);
793
794 #ifdef DEBUG
795 if (ldebug(utimes))
796 printf(ARGS(utimes, "%s, *"), fname);
797 #endif
798
799 if (args->tptr != NULL) {
800 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
801 LFREEPATH(fname);
802 return (error);
803 }
804 tv[0].tv_sec = ltv[0].tv_sec;
805 tv[0].tv_usec = ltv[0].tv_usec;
806 tv[1].tv_sec = ltv[1].tv_sec;
807 tv[1].tv_usec = ltv[1].tv_usec;
808 tvp = tv;
809 }
810
811 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
812 LFREEPATH(fname);
813 return (error);
814 }
815
816 int
817 linux_futimesat(struct thread *td, struct linux_futimesat_args *args)
818 {
819 l_timeval ltv[2];
820 struct timeval tv[2], *tvp = NULL;
821 char *fname;
822 int error, dfd;
823
824 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
825 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd);
826
827 #ifdef DEBUG
828 if (ldebug(futimesat))
829 printf(ARGS(futimesat, "%s, *"), fname);
830 #endif
831
832 if (args->utimes != NULL) {
833 if ((error = copyin(args->utimes, ltv, sizeof ltv))) {
834 LFREEPATH(fname);
835 return (error);
836 }
837 tv[0].tv_sec = ltv[0].tv_sec;
838 tv[0].tv_usec = ltv[0].tv_usec;
839 tv[1].tv_sec = ltv[1].tv_sec;
840 tv[1].tv_usec = ltv[1].tv_usec;
841 tvp = tv;
842 }
843
844 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
845 LFREEPATH(fname);
846 return (error);
847 }
848 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
849
850 int
851 linux_common_wait(struct thread *td, int pid, int *status,
852 int options, struct rusage *ru)
853 {
854 int error, tmpstat;
855
856 error = kern_wait(td, pid, &tmpstat, options, ru);
857 if (error)
858 return (error);
859
860 if (status) {
861 tmpstat &= 0xffff;
862 if (WIFSIGNALED(tmpstat))
863 tmpstat = (tmpstat & 0xffffff80) |
864 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
865 else if (WIFSTOPPED(tmpstat))
866 tmpstat = (tmpstat & 0xffff00ff) |
867 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
868 error = copyout(&tmpstat, status, sizeof(int));
869 }
870
871 return (error);
872 }
873
874 int
875 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
876 {
877 int options;
878
879 #ifdef DEBUG
880 if (ldebug(waitpid))
881 printf(ARGS(waitpid, "%d, %p, %d"),
882 args->pid, (void *)args->status, args->options);
883 #endif
884 /*
885 * this is necessary because the test in kern_wait doesn't work
886 * because we mess with the options here
887 */
888 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
889 return (EINVAL);
890
891 options = (args->options & (WNOHANG | WUNTRACED));
892 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
893 if (args->options & __WCLONE)
894 options |= WLINUXCLONE;
895
896 return (linux_common_wait(td, args->pid, args->status, options, NULL));
897 }
898
899
900 int
901 linux_mknod(struct thread *td, struct linux_mknod_args *args)
902 {
903 char *path;
904 int error;
905
906 LCONVPATHCREAT(td, args->path, &path);
907
908 #ifdef DEBUG
909 if (ldebug(mknod))
910 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
911 #endif
912
913 switch (args->mode & S_IFMT) {
914 case S_IFIFO:
915 case S_IFSOCK:
916 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
917 break;
918
919 case S_IFCHR:
920 case S_IFBLK:
921 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
922 args->dev);
923 break;
924
925 case S_IFDIR:
926 error = EPERM;
927 break;
928
929 case 0:
930 args->mode |= S_IFREG;
931 /* FALLTHROUGH */
932 case S_IFREG:
933 error = kern_open(td, path, UIO_SYSSPACE,
934 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
935 if (error == 0)
936 kern_close(td, td->td_retval[0]);
937 break;
938
939 default:
940 error = EINVAL;
941 break;
942 }
943 LFREEPATH(path);
944 return (error);
945 }
946
947 int
948 linux_mknodat(struct thread *td, struct linux_mknodat_args *args)
949 {
950 char *path;
951 int error, dfd;
952
953 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
954 LCONVPATHCREAT_AT(td, args->filename, &path, dfd);
955
956 #ifdef DEBUG
957 if (ldebug(mknodat))
958 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev);
959 #endif
960
961 switch (args->mode & S_IFMT) {
962 case S_IFIFO:
963 case S_IFSOCK:
964 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode);
965 break;
966
967 case S_IFCHR:
968 case S_IFBLK:
969 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode,
970 args->dev);
971 break;
972
973 case S_IFDIR:
974 error = EPERM;
975 break;
976
977 case 0:
978 args->mode |= S_IFREG;
979 /* FALLTHROUGH */
980 case S_IFREG:
981 error = kern_openat(td, dfd, path, UIO_SYSSPACE,
982 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
983 if (error == 0)
984 kern_close(td, td->td_retval[0]);
985 break;
986
987 default:
988 error = EINVAL;
989 break;
990 }
991 LFREEPATH(path);
992 return (error);
993 }
994
995 /*
996 * UGH! This is just about the dumbest idea I've ever heard!!
997 */
998 int
999 linux_personality(struct thread *td, struct linux_personality_args *args)
1000 {
1001 #ifdef DEBUG
1002 if (ldebug(personality))
1003 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
1004 #endif
1005 if (args->per != 0)
1006 return (EINVAL);
1007
1008 /* Yes Jim, it's still a Linux... */
1009 td->td_retval[0] = 0;
1010 return (0);
1011 }
1012
1013 struct l_itimerval {
1014 l_timeval it_interval;
1015 l_timeval it_value;
1016 };
1017
1018 #define B2L_ITIMERVAL(bip, lip) \
1019 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \
1020 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \
1021 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \
1022 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
1023
1024 int
1025 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
1026 {
1027 int error;
1028 struct l_itimerval ls;
1029 struct itimerval aitv, oitv;
1030
1031 #ifdef DEBUG
1032 if (ldebug(setitimer))
1033 printf(ARGS(setitimer, "%p, %p"),
1034 (void *)uap->itv, (void *)uap->oitv);
1035 #endif
1036
1037 if (uap->itv == NULL) {
1038 uap->itv = uap->oitv;
1039 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
1040 }
1041
1042 error = copyin(uap->itv, &ls, sizeof(ls));
1043 if (error != 0)
1044 return (error);
1045 B2L_ITIMERVAL(&aitv, &ls);
1046 #ifdef DEBUG
1047 if (ldebug(setitimer)) {
1048 printf("setitimer: value: sec: %jd, usec: %ld\n",
1049 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
1050 printf("setitimer: interval: sec: %jd, usec: %ld\n",
1051 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
1052 }
1053 #endif
1054 error = kern_setitimer(td, uap->which, &aitv, &oitv);
1055 if (error != 0 || uap->oitv == NULL)
1056 return (error);
1057 B2L_ITIMERVAL(&ls, &oitv);
1058
1059 return (copyout(&ls, uap->oitv, sizeof(ls)));
1060 }
1061
1062 int
1063 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
1064 {
1065 int error;
1066 struct l_itimerval ls;
1067 struct itimerval aitv;
1068
1069 #ifdef DEBUG
1070 if (ldebug(getitimer))
1071 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
1072 #endif
1073 error = kern_getitimer(td, uap->which, &aitv);
1074 if (error != 0)
1075 return (error);
1076 B2L_ITIMERVAL(&ls, &aitv);
1077 return (copyout(&ls, uap->itv, sizeof(ls)));
1078 }
1079
1080 int
1081 linux_nice(struct thread *td, struct linux_nice_args *args)
1082 {
1083 struct setpriority_args bsd_args;
1084
1085 bsd_args.which = PRIO_PROCESS;
1086 bsd_args.who = 0; /* current process */
1087 bsd_args.prio = args->inc;
1088 return (sys_setpriority(td, &bsd_args));
1089 }
1090
1091 int
1092 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
1093 {
1094 struct ucred *newcred, *oldcred;
1095 l_gid_t *linux_gidset;
1096 gid_t *bsd_gidset;
1097 int ngrp, error;
1098 struct proc *p;
1099
1100 ngrp = args->gidsetsize;
1101 if (ngrp < 0 || ngrp >= ngroups_max + 1)
1102 return (EINVAL);
1103 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
1104 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
1105 if (error)
1106 goto out;
1107 newcred = crget();
1108 p = td->td_proc;
1109 PROC_LOCK(p);
1110 oldcred = crcopysafe(p, newcred);
1111
1112 /*
1113 * cr_groups[0] holds egid. Setting the whole set from
1114 * the supplied set will cause egid to be changed too.
1115 * Keep cr_groups[0] unchanged to prevent that.
1116 */
1117
1118 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
1119 PROC_UNLOCK(p);
1120 crfree(newcred);
1121 goto out;
1122 }
1123
1124 if (ngrp > 0) {
1125 newcred->cr_ngroups = ngrp + 1;
1126
1127 bsd_gidset = newcred->cr_groups;
1128 ngrp--;
1129 while (ngrp >= 0) {
1130 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
1131 ngrp--;
1132 }
1133 } else
1134 newcred->cr_ngroups = 1;
1135
1136 setsugid(p);
1137 p->p_ucred = newcred;
1138 PROC_UNLOCK(p);
1139 crfree(oldcred);
1140 error = 0;
1141 out:
1142 free(linux_gidset, M_TEMP);
1143 return (error);
1144 }
1145
1146 int
1147 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
1148 {
1149 struct ucred *cred;
1150 l_gid_t *linux_gidset;
1151 gid_t *bsd_gidset;
1152 int bsd_gidsetsz, ngrp, error;
1153
1154 cred = td->td_ucred;
1155 bsd_gidset = cred->cr_groups;
1156 bsd_gidsetsz = cred->cr_ngroups - 1;
1157
1158 /*
1159 * cr_groups[0] holds egid. Returning the whole set
1160 * here will cause a duplicate. Exclude cr_groups[0]
1161 * to prevent that.
1162 */
1163
1164 if ((ngrp = args->gidsetsize) == 0) {
1165 td->td_retval[0] = bsd_gidsetsz;
1166 return (0);
1167 }
1168
1169 if (ngrp < bsd_gidsetsz)
1170 return (EINVAL);
1171
1172 ngrp = 0;
1173 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
1174 M_TEMP, M_WAITOK);
1175 while (ngrp < bsd_gidsetsz) {
1176 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1177 ngrp++;
1178 }
1179
1180 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t));
1181 free(linux_gidset, M_TEMP);
1182 if (error)
1183 return (error);
1184
1185 td->td_retval[0] = ngrp;
1186 return (0);
1187 }
1188
1189 int
1190 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
1191 {
1192 struct rlimit bsd_rlim;
1193 struct l_rlimit rlim;
1194 u_int which;
1195 int error;
1196
1197 #ifdef DEBUG
1198 if (ldebug(setrlimit))
1199 printf(ARGS(setrlimit, "%d, %p"),
1200 args->resource, (void *)args->rlim);
1201 #endif
1202
1203 if (args->resource >= LINUX_RLIM_NLIMITS)
1204 return (EINVAL);
1205
1206 which = linux_to_bsd_resource[args->resource];
1207 if (which == -1)
1208 return (EINVAL);
1209
1210 error = copyin(args->rlim, &rlim, sizeof(rlim));
1211 if (error)
1212 return (error);
1213
1214 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
1215 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
1216 return (kern_setrlimit(td, which, &bsd_rlim));
1217 }
1218
1219 int
1220 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
1221 {
1222 struct l_rlimit rlim;
1223 struct proc *p = td->td_proc;
1224 struct rlimit bsd_rlim;
1225 u_int which;
1226
1227 #ifdef DEBUG
1228 if (ldebug(old_getrlimit))
1229 printf(ARGS(old_getrlimit, "%d, %p"),
1230 args->resource, (void *)args->rlim);
1231 #endif
1232
1233 if (args->resource >= LINUX_RLIM_NLIMITS)
1234 return (EINVAL);
1235
1236 which = linux_to_bsd_resource[args->resource];
1237 if (which == -1)
1238 return (EINVAL);
1239
1240 PROC_LOCK(p);
1241 lim_rlimit(p, which, &bsd_rlim);
1242 PROC_UNLOCK(p);
1243
1244 #ifdef COMPAT_LINUX32
1245 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
1246 if (rlim.rlim_cur == UINT_MAX)
1247 rlim.rlim_cur = INT_MAX;
1248 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
1249 if (rlim.rlim_max == UINT_MAX)
1250 rlim.rlim_max = INT_MAX;
1251 #else
1252 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
1253 if (rlim.rlim_cur == ULONG_MAX)
1254 rlim.rlim_cur = LONG_MAX;
1255 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
1256 if (rlim.rlim_max == ULONG_MAX)
1257 rlim.rlim_max = LONG_MAX;
1258 #endif
1259 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1260 }
1261
1262 int
1263 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
1264 {
1265 struct l_rlimit rlim;
1266 struct proc *p = td->td_proc;
1267 struct rlimit bsd_rlim;
1268 u_int which;
1269
1270 #ifdef DEBUG
1271 if (ldebug(getrlimit))
1272 printf(ARGS(getrlimit, "%d, %p"),
1273 args->resource, (void *)args->rlim);
1274 #endif
1275
1276 if (args->resource >= LINUX_RLIM_NLIMITS)
1277 return (EINVAL);
1278
1279 which = linux_to_bsd_resource[args->resource];
1280 if (which == -1)
1281 return (EINVAL);
1282
1283 PROC_LOCK(p);
1284 lim_rlimit(p, which, &bsd_rlim);
1285 PROC_UNLOCK(p);
1286
1287 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
1288 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
1289 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1290 }
1291
1292 int
1293 linux_sched_setscheduler(struct thread *td,
1294 struct linux_sched_setscheduler_args *args)
1295 {
1296 struct sched_setscheduler_args bsd;
1297
1298 #ifdef DEBUG
1299 if (ldebug(sched_setscheduler))
1300 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
1301 args->pid, args->policy, (const void *)args->param);
1302 #endif
1303
1304 switch (args->policy) {
1305 case LINUX_SCHED_OTHER:
1306 bsd.policy = SCHED_OTHER;
1307 break;
1308 case LINUX_SCHED_FIFO:
1309 bsd.policy = SCHED_FIFO;
1310 break;
1311 case LINUX_SCHED_RR:
1312 bsd.policy = SCHED_RR;
1313 break;
1314 default:
1315 return (EINVAL);
1316 }
1317
1318 bsd.pid = args->pid;
1319 bsd.param = (struct sched_param *)args->param;
1320 return (sys_sched_setscheduler(td, &bsd));
1321 }
1322
1323 int
1324 linux_sched_getscheduler(struct thread *td,
1325 struct linux_sched_getscheduler_args *args)
1326 {
1327 struct sched_getscheduler_args bsd;
1328 int error;
1329
1330 #ifdef DEBUG
1331 if (ldebug(sched_getscheduler))
1332 printf(ARGS(sched_getscheduler, "%d"), args->pid);
1333 #endif
1334
1335 bsd.pid = args->pid;
1336 error = sys_sched_getscheduler(td, &bsd);
1337
1338 switch (td->td_retval[0]) {
1339 case SCHED_OTHER:
1340 td->td_retval[0] = LINUX_SCHED_OTHER;
1341 break;
1342 case SCHED_FIFO:
1343 td->td_retval[0] = LINUX_SCHED_FIFO;
1344 break;
1345 case SCHED_RR:
1346 td->td_retval[0] = LINUX_SCHED_RR;
1347 break;
1348 }
1349
1350 return (error);
1351 }
1352
1353 int
1354 linux_sched_get_priority_max(struct thread *td,
1355 struct linux_sched_get_priority_max_args *args)
1356 {
1357 struct sched_get_priority_max_args bsd;
1358
1359 #ifdef DEBUG
1360 if (ldebug(sched_get_priority_max))
1361 printf(ARGS(sched_get_priority_max, "%d"), args->policy);
1362 #endif
1363
1364 switch (args->policy) {
1365 case LINUX_SCHED_OTHER:
1366 bsd.policy = SCHED_OTHER;
1367 break;
1368 case LINUX_SCHED_FIFO:
1369 bsd.policy = SCHED_FIFO;
1370 break;
1371 case LINUX_SCHED_RR:
1372 bsd.policy = SCHED_RR;
1373 break;
1374 default:
1375 return (EINVAL);
1376 }
1377 return (sys_sched_get_priority_max(td, &bsd));
1378 }
1379
1380 int
1381 linux_sched_get_priority_min(struct thread *td,
1382 struct linux_sched_get_priority_min_args *args)
1383 {
1384 struct sched_get_priority_min_args bsd;
1385
1386 #ifdef DEBUG
1387 if (ldebug(sched_get_priority_min))
1388 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
1389 #endif
1390
1391 switch (args->policy) {
1392 case LINUX_SCHED_OTHER:
1393 bsd.policy = SCHED_OTHER;
1394 break;
1395 case LINUX_SCHED_FIFO:
1396 bsd.policy = SCHED_FIFO;
1397 break;
1398 case LINUX_SCHED_RR:
1399 bsd.policy = SCHED_RR;
1400 break;
1401 default:
1402 return (EINVAL);
1403 }
1404 return (sys_sched_get_priority_min(td, &bsd));
1405 }
1406
1407 #define REBOOT_CAD_ON 0x89abcdef
1408 #define REBOOT_CAD_OFF 0
1409 #define REBOOT_HALT 0xcdef0123
1410 #define REBOOT_RESTART 0x01234567
1411 #define REBOOT_RESTART2 0xA1B2C3D4
1412 #define REBOOT_POWEROFF 0x4321FEDC
1413 #define REBOOT_MAGIC1 0xfee1dead
1414 #define REBOOT_MAGIC2 0x28121969
1415 #define REBOOT_MAGIC2A 0x05121996
1416 #define REBOOT_MAGIC2B 0x16041998
1417
1418 int
1419 linux_reboot(struct thread *td, struct linux_reboot_args *args)
1420 {
1421 struct reboot_args bsd_args;
1422
1423 #ifdef DEBUG
1424 if (ldebug(reboot))
1425 printf(ARGS(reboot, "0x%x"), args->cmd);
1426 #endif
1427
1428 if (args->magic1 != REBOOT_MAGIC1)
1429 return (EINVAL);
1430
1431 switch (args->magic2) {
1432 case REBOOT_MAGIC2:
1433 case REBOOT_MAGIC2A:
1434 case REBOOT_MAGIC2B:
1435 break;
1436 default:
1437 return (EINVAL);
1438 }
1439
1440 switch (args->cmd) {
1441 case REBOOT_CAD_ON:
1442 case REBOOT_CAD_OFF:
1443 return (priv_check(td, PRIV_REBOOT));
1444 case REBOOT_HALT:
1445 bsd_args.opt = RB_HALT;
1446 break;
1447 case REBOOT_RESTART:
1448 case REBOOT_RESTART2:
1449 bsd_args.opt = 0;
1450 break;
1451 case REBOOT_POWEROFF:
1452 bsd_args.opt = RB_POWEROFF;
1453 break;
1454 default:
1455 return (EINVAL);
1456 }
1457 return (sys_reboot(td, &bsd_args));
1458 }
1459
1460
1461 /*
1462 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1463 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that
1464 * are assumed to be preserved. The following lightweight syscalls fixes
1465 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c
1466 *
1467 * linux_getpid() - MP SAFE
1468 * linux_getgid() - MP SAFE
1469 * linux_getuid() - MP SAFE
1470 */
1471
1472 int
1473 linux_getpid(struct thread *td, struct linux_getpid_args *args)
1474 {
1475 struct linux_emuldata *em;
1476
1477 #ifdef DEBUG
1478 if (ldebug(getpid))
1479 printf(ARGS(getpid, ""));
1480 #endif
1481
1482 if (linux_use26(td)) {
1483 em = em_find(td->td_proc, EMUL_DONTLOCK);
1484 KASSERT(em != NULL, ("getpid: emuldata not found.\n"));
1485 td->td_retval[0] = em->shared->group_pid;
1486 } else {
1487 td->td_retval[0] = td->td_proc->p_pid;
1488 }
1489
1490 return (0);
1491 }
1492
1493 int
1494 linux_gettid(struct thread *td, struct linux_gettid_args *args)
1495 {
1496
1497 #ifdef DEBUG
1498 if (ldebug(gettid))
1499 printf(ARGS(gettid, ""));
1500 #endif
1501
1502 td->td_retval[0] = td->td_proc->p_pid;
1503 return (0);
1504 }
1505
1506
1507 int
1508 linux_getppid(struct thread *td, struct linux_getppid_args *args)
1509 {
1510 struct linux_emuldata *em;
1511 struct proc *p, *pp;
1512
1513 #ifdef DEBUG
1514 if (ldebug(getppid))
1515 printf(ARGS(getppid, ""));
1516 #endif
1517
1518 if (!linux_use26(td)) {
1519 PROC_LOCK(td->td_proc);
1520 td->td_retval[0] = td->td_proc->p_pptr->p_pid;
1521 PROC_UNLOCK(td->td_proc);
1522 return (0);
1523 }
1524
1525 em = em_find(td->td_proc, EMUL_DONTLOCK);
1526
1527 KASSERT(em != NULL, ("getppid: process emuldata not found.\n"));
1528
1529 /* find the group leader */
1530 p = pfind(em->shared->group_pid);
1531
1532 if (p == NULL) {
1533 #ifdef DEBUG
1534 printf(LMSG("parent process not found.\n"));
1535 #endif
1536 return (0);
1537 }
1538
1539 pp = p->p_pptr; /* switch to parent */
1540 PROC_LOCK(pp);
1541 PROC_UNLOCK(p);
1542
1543 /* if its also linux process */
1544 if (pp->p_sysent == &elf_linux_sysvec) {
1545 em = em_find(pp, EMUL_DONTLOCK);
1546 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n"));
1547
1548 td->td_retval[0] = em->shared->group_pid;
1549 } else
1550 td->td_retval[0] = pp->p_pid;
1551
1552 PROC_UNLOCK(pp);
1553
1554 return (0);
1555 }
1556
1557 int
1558 linux_getgid(struct thread *td, struct linux_getgid_args *args)
1559 {
1560
1561 #ifdef DEBUG
1562 if (ldebug(getgid))
1563 printf(ARGS(getgid, ""));
1564 #endif
1565
1566 td->td_retval[0] = td->td_ucred->cr_rgid;
1567 return (0);
1568 }
1569
1570 int
1571 linux_getuid(struct thread *td, struct linux_getuid_args *args)
1572 {
1573
1574 #ifdef DEBUG
1575 if (ldebug(getuid))
1576 printf(ARGS(getuid, ""));
1577 #endif
1578
1579 td->td_retval[0] = td->td_ucred->cr_ruid;
1580 return (0);
1581 }
1582
1583
1584 int
1585 linux_getsid(struct thread *td, struct linux_getsid_args *args)
1586 {
1587 struct getsid_args bsd;
1588
1589 #ifdef DEBUG
1590 if (ldebug(getsid))
1591 printf(ARGS(getsid, "%i"), args->pid);
1592 #endif
1593
1594 bsd.pid = args->pid;
1595 return (sys_getsid(td, &bsd));
1596 }
1597
1598 int
1599 linux_nosys(struct thread *td, struct nosys_args *ignore)
1600 {
1601
1602 return (ENOSYS);
1603 }
1604
1605 int
1606 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
1607 {
1608 struct getpriority_args bsd_args;
1609 int error;
1610
1611 #ifdef DEBUG
1612 if (ldebug(getpriority))
1613 printf(ARGS(getpriority, "%i, %i"), args->which, args->who);
1614 #endif
1615
1616 bsd_args.which = args->which;
1617 bsd_args.who = args->who;
1618 error = sys_getpriority(td, &bsd_args);
1619 td->td_retval[0] = 20 - td->td_retval[0];
1620 return (error);
1621 }
1622
1623 int
1624 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
1625 {
1626 int name[2];
1627
1628 #ifdef DEBUG
1629 if (ldebug(sethostname))
1630 printf(ARGS(sethostname, "*, %i"), args->len);
1631 #endif
1632
1633 name[0] = CTL_KERN;
1634 name[1] = KERN_HOSTNAME;
1635 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
1636 args->len, 0, 0));
1637 }
1638
1639 int
1640 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args)
1641 {
1642 int name[2];
1643
1644 #ifdef DEBUG
1645 if (ldebug(setdomainname))
1646 printf(ARGS(setdomainname, "*, %i"), args->len);
1647 #endif
1648
1649 name[0] = CTL_KERN;
1650 name[1] = KERN_NISDOMAINNAME;
1651 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name,
1652 args->len, 0, 0));
1653 }
1654
1655 int
1656 linux_exit_group(struct thread *td, struct linux_exit_group_args *args)
1657 {
1658 struct linux_emuldata *em;
1659
1660 #ifdef DEBUG
1661 if (ldebug(exit_group))
1662 printf(ARGS(exit_group, "%i"), args->error_code);
1663 #endif
1664
1665 em = em_find(td->td_proc, EMUL_DONTLOCK);
1666 if (em->shared->refs > 1) {
1667 EMUL_SHARED_WLOCK(&emul_shared_lock);
1668 em->shared->flags |= EMUL_SHARED_HASXSTAT;
1669 em->shared->xstat = W_EXITCODE(args->error_code, 0);
1670 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
1671 if (linux_use26(td))
1672 linux_kill_threads(td, SIGKILL);
1673 }
1674
1675 /*
1676 * XXX: we should send a signal to the parent if
1677 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?)
1678 * as it doesnt occur often.
1679 */
1680 exit1(td, W_EXITCODE(args->error_code, 0));
1681
1682 return (0);
1683 }
1684
1685 #define _LINUX_CAPABILITY_VERSION 0x19980330
1686
1687 struct l_user_cap_header {
1688 l_int version;
1689 l_int pid;
1690 };
1691
1692 struct l_user_cap_data {
1693 l_int effective;
1694 l_int permitted;
1695 l_int inheritable;
1696 };
1697
1698 int
1699 linux_capget(struct thread *td, struct linux_capget_args *args)
1700 {
1701 struct l_user_cap_header luch;
1702 struct l_user_cap_data lucd;
1703 int error;
1704
1705 if (args->hdrp == NULL)
1706 return (EFAULT);
1707
1708 error = copyin(args->hdrp, &luch, sizeof(luch));
1709 if (error != 0)
1710 return (error);
1711
1712 if (luch.version != _LINUX_CAPABILITY_VERSION) {
1713 luch.version = _LINUX_CAPABILITY_VERSION;
1714 error = copyout(&luch, args->hdrp, sizeof(luch));
1715 if (error)
1716 return (error);
1717 return (EINVAL);
1718 }
1719
1720 if (luch.pid)
1721 return (EPERM);
1722
1723 if (args->datap) {
1724 /*
1725 * The current implementation doesn't support setting
1726 * a capability (it's essentially a stub) so indicate
1727 * that no capabilities are currently set or available
1728 * to request.
1729 */
1730 bzero (&lucd, sizeof(lucd));
1731 error = copyout(&lucd, args->datap, sizeof(lucd));
1732 }
1733
1734 return (error);
1735 }
1736
1737 int
1738 linux_capset(struct thread *td, struct linux_capset_args *args)
1739 {
1740 struct l_user_cap_header luch;
1741 struct l_user_cap_data lucd;
1742 int error;
1743
1744 if (args->hdrp == NULL || args->datap == NULL)
1745 return (EFAULT);
1746
1747 error = copyin(args->hdrp, &luch, sizeof(luch));
1748 if (error != 0)
1749 return (error);
1750
1751 if (luch.version != _LINUX_CAPABILITY_VERSION) {
1752 luch.version = _LINUX_CAPABILITY_VERSION;
1753 error = copyout(&luch, args->hdrp, sizeof(luch));
1754 if (error)
1755 return (error);
1756 return (EINVAL);
1757 }
1758
1759 if (luch.pid)
1760 return (EPERM);
1761
1762 error = copyin(args->datap, &lucd, sizeof(lucd));
1763 if (error != 0)
1764 return (error);
1765
1766 /* We currently don't support setting any capabilities. */
1767 if (lucd.effective || lucd.permitted || lucd.inheritable) {
1768 linux_msg(td,
1769 "capset effective=0x%x, permitted=0x%x, "
1770 "inheritable=0x%x is not implemented",
1771 (int)lucd.effective, (int)lucd.permitted,
1772 (int)lucd.inheritable);
1773 return (EPERM);
1774 }
1775
1776 return (0);
1777 }
1778
1779 int
1780 linux_prctl(struct thread *td, struct linux_prctl_args *args)
1781 {
1782 int error = 0, max_size;
1783 struct proc *p = td->td_proc;
1784 char comm[LINUX_MAX_COMM_LEN];
1785 struct linux_emuldata *em;
1786 int pdeath_signal;
1787
1788 #ifdef DEBUG
1789 if (ldebug(prctl))
1790 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option,
1791 args->arg2, args->arg3, args->arg4, args->arg5);
1792 #endif
1793
1794 switch (args->option) {
1795 case LINUX_PR_SET_PDEATHSIG:
1796 if (!LINUX_SIG_VALID(args->arg2))
1797 return (EINVAL);
1798 em = em_find(p, EMUL_DOLOCK);
1799 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1800 em->pdeath_signal = args->arg2;
1801 EMUL_UNLOCK(&emul_lock);
1802 break;
1803 case LINUX_PR_GET_PDEATHSIG:
1804 em = em_find(p, EMUL_DOLOCK);
1805 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1806 pdeath_signal = em->pdeath_signal;
1807 EMUL_UNLOCK(&emul_lock);
1808 error = copyout(&pdeath_signal,
1809 (void *)(register_t)args->arg2,
1810 sizeof(pdeath_signal));
1811 break;
1812 case LINUX_PR_GET_KEEPCAPS:
1813 /*
1814 * Indicate that we always clear the effective and
1815 * permitted capability sets when the user id becomes
1816 * non-zero (actually the capability sets are simply
1817 * always zero in the current implementation).
1818 */
1819 td->td_retval[0] = 0;
1820 break;
1821 case LINUX_PR_SET_KEEPCAPS:
1822 /*
1823 * Ignore requests to keep the effective and permitted
1824 * capability sets when the user id becomes non-zero.
1825 */
1826 break;
1827 case LINUX_PR_SET_NAME:
1828 /*
1829 * To be on the safe side we need to make sure to not
1830 * overflow the size a linux program expects. We already
1831 * do this here in the copyin, so that we don't need to
1832 * check on copyout.
1833 */
1834 max_size = MIN(sizeof(comm), sizeof(p->p_comm));
1835 error = copyinstr((void *)(register_t)args->arg2, comm,
1836 max_size, NULL);
1837
1838 /* Linux silently truncates the name if it is too long. */
1839 if (error == ENAMETOOLONG) {
1840 /*
1841 * XXX: copyinstr() isn't documented to populate the
1842 * array completely, so do a copyin() to be on the
1843 * safe side. This should be changed in case
1844 * copyinstr() is changed to guarantee this.
1845 */
1846 error = copyin((void *)(register_t)args->arg2, comm,
1847 max_size - 1);
1848 comm[max_size - 1] = '\0';
1849 }
1850 if (error)
1851 return (error);
1852
1853 PROC_LOCK(p);
1854 strlcpy(p->p_comm, comm, sizeof(p->p_comm));
1855 PROC_UNLOCK(p);
1856 break;
1857 case LINUX_PR_GET_NAME:
1858 PROC_LOCK(p);
1859 strlcpy(comm, p->p_comm, sizeof(comm));
1860 PROC_UNLOCK(p);
1861 error = copyout(comm, (void *)(register_t)args->arg2,
1862 strlen(comm) + 1);
1863 break;
1864 default:
1865 error = EINVAL;
1866 break;
1867 }
1868
1869 return (error);
1870 }
1871
1872 /*
1873 * Get affinity of a process.
1874 */
1875 int
1876 linux_sched_getaffinity(struct thread *td,
1877 struct linux_sched_getaffinity_args *args)
1878 {
1879 int error;
1880 struct cpuset_getaffinity_args cga;
1881
1882 #ifdef DEBUG
1883 if (ldebug(sched_getaffinity))
1884 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid,
1885 args->len);
1886 #endif
1887 if (args->len < sizeof(cpuset_t))
1888 return (EINVAL);
1889
1890 cga.level = CPU_LEVEL_WHICH;
1891 cga.which = CPU_WHICH_PID;
1892 cga.id = args->pid;
1893 cga.cpusetsize = sizeof(cpuset_t);
1894 cga.mask = (cpuset_t *) args->user_mask_ptr;
1895
1896 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0)
1897 td->td_retval[0] = sizeof(cpuset_t);
1898
1899 return (error);
1900 }
1901
1902 /*
1903 * Set affinity of a process.
1904 */
1905 int
1906 linux_sched_setaffinity(struct thread *td,
1907 struct linux_sched_setaffinity_args *args)
1908 {
1909 struct cpuset_setaffinity_args csa;
1910
1911 #ifdef DEBUG
1912 if (ldebug(sched_setaffinity))
1913 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid,
1914 args->len);
1915 #endif
1916 if (args->len < sizeof(cpuset_t))
1917 return (EINVAL);
1918
1919 csa.level = CPU_LEVEL_WHICH;
1920 csa.which = CPU_WHICH_PID;
1921 csa.id = args->pid;
1922 csa.cpusetsize = sizeof(cpuset_t);
1923 csa.mask = (cpuset_t *) args->user_mask_ptr;
1924
1925 return (sys_cpuset_setaffinity(td, &csa));
1926 }
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