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/10.2/sys/compat/linux/linux_misc.c 301051 2016-05-31 16:55:45Z glebius $");
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 bzero(&sysinfo, sizeof(sysinfo));
142 getnanouptime(&ts);
143 if (ts.tv_nsec != 0)
144 ts.tv_sec++;
145 sysinfo.uptime = ts.tv_sec;
146
147 /* Use the information from the mib to get our load averages */
148 for (i = 0; i < 3; i++)
149 sysinfo.loads[i] = averunnable.ldavg[i] *
150 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
151
152 sysinfo.totalram = physmem * PAGE_SIZE;
153 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
154
155 sysinfo.sharedram = 0;
156 mtx_lock(&vm_object_list_mtx);
157 TAILQ_FOREACH(object, &vm_object_list, object_list)
158 if (object->shadow_count > 1)
159 sysinfo.sharedram += object->resident_page_count;
160 mtx_unlock(&vm_object_list_mtx);
161
162 sysinfo.sharedram *= PAGE_SIZE;
163 sysinfo.bufferram = 0;
164
165 swap_pager_status(&i, &j);
166 sysinfo.totalswap = i * PAGE_SIZE;
167 sysinfo.freeswap = (i - j) * PAGE_SIZE;
168
169 sysinfo.procs = nprocs;
170
171 /* The following are only present in newer Linux kernels. */
172 sysinfo.totalbig = 0;
173 sysinfo.freebig = 0;
174 sysinfo.mem_unit = 1;
175
176 return (copyout(&sysinfo, args->info, sizeof(sysinfo)));
177 }
178
179 int
180 linux_alarm(struct thread *td, struct linux_alarm_args *args)
181 {
182 struct itimerval it, old_it;
183 u_int secs;
184 int error;
185
186 #ifdef DEBUG
187 if (ldebug(alarm))
188 printf(ARGS(alarm, "%u"), args->secs);
189 #endif
190
191 secs = args->secs;
192
193 if (secs > INT_MAX)
194 secs = INT_MAX;
195
196 it.it_value.tv_sec = (long) secs;
197 it.it_value.tv_usec = 0;
198 it.it_interval.tv_sec = 0;
199 it.it_interval.tv_usec = 0;
200 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
201 if (error)
202 return (error);
203 if (timevalisset(&old_it.it_value)) {
204 if (old_it.it_value.tv_usec != 0)
205 old_it.it_value.tv_sec++;
206 td->td_retval[0] = old_it.it_value.tv_sec;
207 }
208 return (0);
209 }
210
211 int
212 linux_brk(struct thread *td, struct linux_brk_args *args)
213 {
214 struct vmspace *vm = td->td_proc->p_vmspace;
215 vm_offset_t new, old;
216 struct obreak_args /* {
217 char * nsize;
218 } */ tmp;
219
220 #ifdef DEBUG
221 if (ldebug(brk))
222 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
223 #endif
224 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
225 new = (vm_offset_t)args->dsend;
226 tmp.nsize = (char *)new;
227 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp))
228 td->td_retval[0] = (long)new;
229 else
230 td->td_retval[0] = (long)old;
231
232 return (0);
233 }
234
235 #if defined(__i386__)
236 /* XXX: what about amd64/linux32? */
237
238 int
239 linux_uselib(struct thread *td, struct linux_uselib_args *args)
240 {
241 struct nameidata ni;
242 struct vnode *vp;
243 struct exec *a_out;
244 struct vattr attr;
245 vm_offset_t vmaddr;
246 unsigned long file_offset;
247 unsigned long bss_size;
248 char *library;
249 ssize_t aresid;
250 int error, locked, writecount;
251
252 LCONVPATHEXIST(td, args->library, &library);
253
254 #ifdef DEBUG
255 if (ldebug(uselib))
256 printf(ARGS(uselib, "%s"), library);
257 #endif
258
259 a_out = NULL;
260 locked = 0;
261 vp = NULL;
262
263 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1,
264 UIO_SYSSPACE, library, td);
265 error = namei(&ni);
266 LFREEPATH(library);
267 if (error)
268 goto cleanup;
269
270 vp = ni.ni_vp;
271 NDFREE(&ni, NDF_ONLY_PNBUF);
272
273 /*
274 * From here on down, we have a locked vnode that must be unlocked.
275 * XXX: The code below largely duplicates exec_check_permissions().
276 */
277 locked = 1;
278
279 /* Writable? */
280 error = VOP_GET_WRITECOUNT(vp, &writecount);
281 if (error != 0)
282 goto cleanup;
283 if (writecount != 0) {
284 error = ETXTBSY;
285 goto cleanup;
286 }
287
288 /* Executable? */
289 error = VOP_GETATTR(vp, &attr, td->td_ucred);
290 if (error)
291 goto cleanup;
292
293 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
294 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
295 /* EACCESS is what exec(2) returns. */
296 error = ENOEXEC;
297 goto cleanup;
298 }
299
300 /* Sensible size? */
301 if (attr.va_size == 0) {
302 error = ENOEXEC;
303 goto cleanup;
304 }
305
306 /* Can we access it? */
307 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
308 if (error)
309 goto cleanup;
310
311 /*
312 * XXX: This should use vn_open() so that it is properly authorized,
313 * and to reduce code redundancy all over the place here.
314 * XXX: Not really, it duplicates far more of exec_check_permissions()
315 * than vn_open().
316 */
317 #ifdef MAC
318 error = mac_vnode_check_open(td->td_ucred, vp, VREAD);
319 if (error)
320 goto cleanup;
321 #endif
322 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
323 if (error)
324 goto cleanup;
325
326 /* Pull in executable header into exec_map */
327 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE,
328 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
329 if (error)
330 goto cleanup;
331
332 /* Is it a Linux binary ? */
333 if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
334 error = ENOEXEC;
335 goto cleanup;
336 }
337
338 /*
339 * While we are here, we should REALLY do some more checks
340 */
341
342 /* Set file/virtual offset based on a.out variant. */
343 switch ((int)(a_out->a_magic & 0xffff)) {
344 case 0413: /* ZMAGIC */
345 file_offset = 1024;
346 break;
347 case 0314: /* QMAGIC */
348 file_offset = 0;
349 break;
350 default:
351 error = ENOEXEC;
352 goto cleanup;
353 }
354
355 bss_size = round_page(a_out->a_bss);
356
357 /* Check various fields in header for validity/bounds. */
358 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
359 error = ENOEXEC;
360 goto cleanup;
361 }
362
363 /* text + data can't exceed file size */
364 if (a_out->a_data + a_out->a_text > attr.va_size) {
365 error = EFAULT;
366 goto cleanup;
367 }
368
369 /*
370 * text/data/bss must not exceed limits
371 * XXX - this is not complete. it should check current usage PLUS
372 * the resources needed by this library.
373 */
374 PROC_LOCK(td->td_proc);
375 if (a_out->a_text > maxtsiz ||
376 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) ||
377 racct_set(td->td_proc, RACCT_DATA, a_out->a_data +
378 bss_size) != 0) {
379 PROC_UNLOCK(td->td_proc);
380 error = ENOMEM;
381 goto cleanup;
382 }
383 PROC_UNLOCK(td->td_proc);
384
385 /*
386 * Prevent more writers.
387 * XXX: Note that if any of the VM operations fail below we don't
388 * clear this flag.
389 */
390 VOP_SET_TEXT(vp);
391
392 /*
393 * Lock no longer needed
394 */
395 locked = 0;
396 VOP_UNLOCK(vp, 0);
397
398 /*
399 * Check if file_offset page aligned. Currently we cannot handle
400 * misalinged file offsets, and so we read in the entire image
401 * (what a waste).
402 */
403 if (file_offset & PAGE_MASK) {
404 #ifdef DEBUG
405 printf("uselib: Non page aligned binary %lu\n", file_offset);
406 #endif
407 /* Map text+data read/write/execute */
408
409 /* a_entry is the load address and is page aligned */
410 vmaddr = trunc_page(a_out->a_entry);
411
412 /* get anon user mapping, read+write+execute */
413 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
414 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE,
415 VM_PROT_ALL, VM_PROT_ALL, 0);
416 if (error)
417 goto cleanup;
418
419 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset,
420 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0,
421 td->td_ucred, NOCRED, &aresid, td);
422 if (error != 0)
423 goto cleanup;
424 if (aresid != 0) {
425 error = ENOEXEC;
426 goto cleanup;
427 }
428 } else {
429 #ifdef DEBUG
430 printf("uselib: Page aligned binary %lu\n", file_offset);
431 #endif
432 /*
433 * for QMAGIC, a_entry is 20 bytes beyond the load address
434 * to skip the executable header
435 */
436 vmaddr = trunc_page(a_out->a_entry);
437
438 /*
439 * Map it all into the process's space as a single
440 * copy-on-write "data" segment.
441 */
442 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
443 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
444 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
445 if (error)
446 goto cleanup;
447 }
448 #ifdef DEBUG
449 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
450 ((long *)vmaddr)[1]);
451 #endif
452 if (bss_size != 0) {
453 /* Calculate BSS start address */
454 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
455 a_out->a_data;
456
457 /* allocate some 'anon' space */
458 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
459 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL,
460 VM_PROT_ALL, 0);
461 if (error)
462 goto cleanup;
463 }
464
465 cleanup:
466 /* Unlock vnode if needed */
467 if (locked)
468 VOP_UNLOCK(vp, 0);
469
470 /* Release the temporary mapping. */
471 if (a_out)
472 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE);
473
474 return (error);
475 }
476
477 #endif /* __i386__ */
478
479 int
480 linux_select(struct thread *td, struct linux_select_args *args)
481 {
482 l_timeval ltv;
483 struct timeval tv0, tv1, utv, *tvp;
484 int error;
485
486 #ifdef DEBUG
487 if (ldebug(select))
488 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
489 (void *)args->readfds, (void *)args->writefds,
490 (void *)args->exceptfds, (void *)args->timeout);
491 #endif
492
493 /*
494 * Store current time for computation of the amount of
495 * time left.
496 */
497 if (args->timeout) {
498 if ((error = copyin(args->timeout, <v, sizeof(ltv))))
499 goto select_out;
500 utv.tv_sec = ltv.tv_sec;
501 utv.tv_usec = ltv.tv_usec;
502 #ifdef DEBUG
503 if (ldebug(select))
504 printf(LMSG("incoming timeout (%jd/%ld)"),
505 (intmax_t)utv.tv_sec, utv.tv_usec);
506 #endif
507
508 if (itimerfix(&utv)) {
509 /*
510 * The timeval was invalid. Convert it to something
511 * valid that will act as it does under Linux.
512 */
513 utv.tv_sec += utv.tv_usec / 1000000;
514 utv.tv_usec %= 1000000;
515 if (utv.tv_usec < 0) {
516 utv.tv_sec -= 1;
517 utv.tv_usec += 1000000;
518 }
519 if (utv.tv_sec < 0)
520 timevalclear(&utv);
521 }
522 microtime(&tv0);
523 tvp = &utv;
524 } else
525 tvp = NULL;
526
527 error = kern_select(td, args->nfds, args->readfds, args->writefds,
528 args->exceptfds, tvp, sizeof(l_int) * 8);
529
530 #ifdef DEBUG
531 if (ldebug(select))
532 printf(LMSG("real select returns %d"), error);
533 #endif
534 if (error)
535 goto select_out;
536
537 if (args->timeout) {
538 if (td->td_retval[0]) {
539 /*
540 * Compute how much time was left of the timeout,
541 * by subtracting the current time and the time
542 * before we started the call, and subtracting
543 * that result from the user-supplied value.
544 */
545 microtime(&tv1);
546 timevalsub(&tv1, &tv0);
547 timevalsub(&utv, &tv1);
548 if (utv.tv_sec < 0)
549 timevalclear(&utv);
550 } else
551 timevalclear(&utv);
552 #ifdef DEBUG
553 if (ldebug(select))
554 printf(LMSG("outgoing timeout (%jd/%ld)"),
555 (intmax_t)utv.tv_sec, utv.tv_usec);
556 #endif
557 ltv.tv_sec = utv.tv_sec;
558 ltv.tv_usec = utv.tv_usec;
559 if ((error = copyout(<v, args->timeout, sizeof(ltv))))
560 goto select_out;
561 }
562
563 select_out:
564 #ifdef DEBUG
565 if (ldebug(select))
566 printf(LMSG("select_out -> %d"), error);
567 #endif
568 return (error);
569 }
570
571 int
572 linux_mremap(struct thread *td, struct linux_mremap_args *args)
573 {
574 struct munmap_args /* {
575 void *addr;
576 size_t len;
577 } */ bsd_args;
578 int error = 0;
579
580 #ifdef DEBUG
581 if (ldebug(mremap))
582 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
583 (void *)(uintptr_t)args->addr,
584 (unsigned long)args->old_len,
585 (unsigned long)args->new_len,
586 (unsigned long)args->flags);
587 #endif
588
589 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
590 td->td_retval[0] = 0;
591 return (EINVAL);
592 }
593
594 /*
595 * Check for the page alignment.
596 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
597 */
598 if (args->addr & PAGE_MASK) {
599 td->td_retval[0] = 0;
600 return (EINVAL);
601 }
602
603 args->new_len = round_page(args->new_len);
604 args->old_len = round_page(args->old_len);
605
606 if (args->new_len > args->old_len) {
607 td->td_retval[0] = 0;
608 return (ENOMEM);
609 }
610
611 if (args->new_len < args->old_len) {
612 bsd_args.addr =
613 (caddr_t)((uintptr_t)args->addr + args->new_len);
614 bsd_args.len = args->old_len - args->new_len;
615 error = sys_munmap(td, &bsd_args);
616 }
617
618 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
619 return (error);
620 }
621
622 #define LINUX_MS_ASYNC 0x0001
623 #define LINUX_MS_INVALIDATE 0x0002
624 #define LINUX_MS_SYNC 0x0004
625
626 int
627 linux_msync(struct thread *td, struct linux_msync_args *args)
628 {
629 struct msync_args bsd_args;
630
631 bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
632 bsd_args.len = (uintptr_t)args->len;
633 bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
634
635 return (sys_msync(td, &bsd_args));
636 }
637
638 int
639 linux_time(struct thread *td, struct linux_time_args *args)
640 {
641 struct timeval tv;
642 l_time_t tm;
643 int error;
644
645 #ifdef DEBUG
646 if (ldebug(time))
647 printf(ARGS(time, "*"));
648 #endif
649
650 microtime(&tv);
651 tm = tv.tv_sec;
652 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
653 return (error);
654 td->td_retval[0] = tm;
655 return (0);
656 }
657
658 struct l_times_argv {
659 l_clock_t tms_utime;
660 l_clock_t tms_stime;
661 l_clock_t tms_cutime;
662 l_clock_t tms_cstime;
663 };
664
665
666 /*
667 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value.
668 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK
669 * auxiliary vector entry.
670 */
671 #define CLK_TCK 100
672
673 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
674 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz))
675
676 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \
677 CONVNTCK(r) : CONVOTCK(r))
678
679 int
680 linux_times(struct thread *td, struct linux_times_args *args)
681 {
682 struct timeval tv, utime, stime, cutime, cstime;
683 struct l_times_argv tms;
684 struct proc *p;
685 int error;
686
687 #ifdef DEBUG
688 if (ldebug(times))
689 printf(ARGS(times, "*"));
690 #endif
691
692 if (args->buf != NULL) {
693 p = td->td_proc;
694 PROC_LOCK(p);
695 PROC_SLOCK(p);
696 calcru(p, &utime, &stime);
697 PROC_SUNLOCK(p);
698 calccru(p, &cutime, &cstime);
699 PROC_UNLOCK(p);
700
701 tms.tms_utime = CONVTCK(utime);
702 tms.tms_stime = CONVTCK(stime);
703
704 tms.tms_cutime = CONVTCK(cutime);
705 tms.tms_cstime = CONVTCK(cstime);
706
707 if ((error = copyout(&tms, args->buf, sizeof(tms))))
708 return (error);
709 }
710
711 microuptime(&tv);
712 td->td_retval[0] = (int)CONVTCK(tv);
713 return (0);
714 }
715
716 int
717 linux_newuname(struct thread *td, struct linux_newuname_args *args)
718 {
719 struct l_new_utsname utsname;
720 char osname[LINUX_MAX_UTSNAME];
721 char osrelease[LINUX_MAX_UTSNAME];
722 char *p;
723
724 #ifdef DEBUG
725 if (ldebug(newuname))
726 printf(ARGS(newuname, "*"));
727 #endif
728
729 linux_get_osname(td, osname);
730 linux_get_osrelease(td, osrelease);
731
732 bzero(&utsname, sizeof(utsname));
733 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
734 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
735 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME);
736 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
737 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
738 for (p = utsname.version; *p != '\0'; ++p)
739 if (*p == '\n') {
740 *p = '\0';
741 break;
742 }
743 strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME);
744
745 return (copyout(&utsname, args->buf, sizeof(utsname)));
746 }
747
748 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
749 struct l_utimbuf {
750 l_time_t l_actime;
751 l_time_t l_modtime;
752 };
753
754 int
755 linux_utime(struct thread *td, struct linux_utime_args *args)
756 {
757 struct timeval tv[2], *tvp;
758 struct l_utimbuf lut;
759 char *fname;
760 int error;
761
762 LCONVPATHEXIST(td, args->fname, &fname);
763
764 #ifdef DEBUG
765 if (ldebug(utime))
766 printf(ARGS(utime, "%s, *"), fname);
767 #endif
768
769 if (args->times) {
770 if ((error = copyin(args->times, &lut, sizeof lut))) {
771 LFREEPATH(fname);
772 return (error);
773 }
774 tv[0].tv_sec = lut.l_actime;
775 tv[0].tv_usec = 0;
776 tv[1].tv_sec = lut.l_modtime;
777 tv[1].tv_usec = 0;
778 tvp = tv;
779 } else
780 tvp = NULL;
781
782 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
783 LFREEPATH(fname);
784 return (error);
785 }
786
787 int
788 linux_utimes(struct thread *td, struct linux_utimes_args *args)
789 {
790 l_timeval ltv[2];
791 struct timeval tv[2], *tvp = NULL;
792 char *fname;
793 int error;
794
795 LCONVPATHEXIST(td, args->fname, &fname);
796
797 #ifdef DEBUG
798 if (ldebug(utimes))
799 printf(ARGS(utimes, "%s, *"), fname);
800 #endif
801
802 if (args->tptr != NULL) {
803 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
804 LFREEPATH(fname);
805 return (error);
806 }
807 tv[0].tv_sec = ltv[0].tv_sec;
808 tv[0].tv_usec = ltv[0].tv_usec;
809 tv[1].tv_sec = ltv[1].tv_sec;
810 tv[1].tv_usec = ltv[1].tv_usec;
811 tvp = tv;
812 }
813
814 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
815 LFREEPATH(fname);
816 return (error);
817 }
818
819 int
820 linux_futimesat(struct thread *td, struct linux_futimesat_args *args)
821 {
822 l_timeval ltv[2];
823 struct timeval tv[2], *tvp = NULL;
824 char *fname;
825 int error, dfd;
826
827 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
828 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd);
829
830 #ifdef DEBUG
831 if (ldebug(futimesat))
832 printf(ARGS(futimesat, "%s, *"), fname);
833 #endif
834
835 if (args->utimes != NULL) {
836 if ((error = copyin(args->utimes, ltv, sizeof ltv))) {
837 LFREEPATH(fname);
838 return (error);
839 }
840 tv[0].tv_sec = ltv[0].tv_sec;
841 tv[0].tv_usec = ltv[0].tv_usec;
842 tv[1].tv_sec = ltv[1].tv_sec;
843 tv[1].tv_usec = ltv[1].tv_usec;
844 tvp = tv;
845 }
846
847 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
848 LFREEPATH(fname);
849 return (error);
850 }
851 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
852
853 int
854 linux_common_wait(struct thread *td, int pid, int *status,
855 int options, struct rusage *ru)
856 {
857 int error, tmpstat;
858
859 error = kern_wait(td, pid, &tmpstat, options, ru);
860 if (error)
861 return (error);
862
863 if (status) {
864 tmpstat &= 0xffff;
865 if (WIFSIGNALED(tmpstat))
866 tmpstat = (tmpstat & 0xffffff80) |
867 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
868 else if (WIFSTOPPED(tmpstat))
869 tmpstat = (tmpstat & 0xffff00ff) |
870 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
871 error = copyout(&tmpstat, status, sizeof(int));
872 }
873
874 return (error);
875 }
876
877 int
878 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
879 {
880 int options;
881
882 #ifdef DEBUG
883 if (ldebug(waitpid))
884 printf(ARGS(waitpid, "%d, %p, %d"),
885 args->pid, (void *)args->status, args->options);
886 #endif
887 /*
888 * this is necessary because the test in kern_wait doesn't work
889 * because we mess with the options here
890 */
891 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
892 return (EINVAL);
893
894 options = (args->options & (WNOHANG | WUNTRACED));
895 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
896 if (args->options & __WCLONE)
897 options |= WLINUXCLONE;
898
899 return (linux_common_wait(td, args->pid, args->status, options, NULL));
900 }
901
902
903 int
904 linux_mknod(struct thread *td, struct linux_mknod_args *args)
905 {
906 char *path;
907 int error;
908
909 LCONVPATHCREAT(td, args->path, &path);
910
911 #ifdef DEBUG
912 if (ldebug(mknod))
913 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
914 #endif
915
916 switch (args->mode & S_IFMT) {
917 case S_IFIFO:
918 case S_IFSOCK:
919 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
920 break;
921
922 case S_IFCHR:
923 case S_IFBLK:
924 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
925 args->dev);
926 break;
927
928 case S_IFDIR:
929 error = EPERM;
930 break;
931
932 case 0:
933 args->mode |= S_IFREG;
934 /* FALLTHROUGH */
935 case S_IFREG:
936 error = kern_open(td, path, UIO_SYSSPACE,
937 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
938 if (error == 0)
939 kern_close(td, td->td_retval[0]);
940 break;
941
942 default:
943 error = EINVAL;
944 break;
945 }
946 LFREEPATH(path);
947 return (error);
948 }
949
950 int
951 linux_mknodat(struct thread *td, struct linux_mknodat_args *args)
952 {
953 char *path;
954 int error, dfd;
955
956 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
957 LCONVPATHCREAT_AT(td, args->filename, &path, dfd);
958
959 #ifdef DEBUG
960 if (ldebug(mknodat))
961 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev);
962 #endif
963
964 switch (args->mode & S_IFMT) {
965 case S_IFIFO:
966 case S_IFSOCK:
967 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode);
968 break;
969
970 case S_IFCHR:
971 case S_IFBLK:
972 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode,
973 args->dev);
974 break;
975
976 case S_IFDIR:
977 error = EPERM;
978 break;
979
980 case 0:
981 args->mode |= S_IFREG;
982 /* FALLTHROUGH */
983 case S_IFREG:
984 error = kern_openat(td, dfd, path, UIO_SYSSPACE,
985 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
986 if (error == 0)
987 kern_close(td, td->td_retval[0]);
988 break;
989
990 default:
991 error = EINVAL;
992 break;
993 }
994 LFREEPATH(path);
995 return (error);
996 }
997
998 /*
999 * UGH! This is just about the dumbest idea I've ever heard!!
1000 */
1001 int
1002 linux_personality(struct thread *td, struct linux_personality_args *args)
1003 {
1004 #ifdef DEBUG
1005 if (ldebug(personality))
1006 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
1007 #endif
1008 if (args->per != 0)
1009 return (EINVAL);
1010
1011 /* Yes Jim, it's still a Linux... */
1012 td->td_retval[0] = 0;
1013 return (0);
1014 }
1015
1016 struct l_itimerval {
1017 l_timeval it_interval;
1018 l_timeval it_value;
1019 };
1020
1021 #define B2L_ITIMERVAL(bip, lip) \
1022 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \
1023 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \
1024 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \
1025 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
1026
1027 int
1028 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
1029 {
1030 int error;
1031 struct l_itimerval ls;
1032 struct itimerval aitv, oitv;
1033
1034 #ifdef DEBUG
1035 if (ldebug(setitimer))
1036 printf(ARGS(setitimer, "%p, %p"),
1037 (void *)uap->itv, (void *)uap->oitv);
1038 #endif
1039
1040 if (uap->itv == NULL) {
1041 uap->itv = uap->oitv;
1042 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
1043 }
1044
1045 error = copyin(uap->itv, &ls, sizeof(ls));
1046 if (error != 0)
1047 return (error);
1048 B2L_ITIMERVAL(&aitv, &ls);
1049 #ifdef DEBUG
1050 if (ldebug(setitimer)) {
1051 printf("setitimer: value: sec: %jd, usec: %ld\n",
1052 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
1053 printf("setitimer: interval: sec: %jd, usec: %ld\n",
1054 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
1055 }
1056 #endif
1057 error = kern_setitimer(td, uap->which, &aitv, &oitv);
1058 if (error != 0 || uap->oitv == NULL)
1059 return (error);
1060 B2L_ITIMERVAL(&ls, &oitv);
1061
1062 return (copyout(&ls, uap->oitv, sizeof(ls)));
1063 }
1064
1065 int
1066 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
1067 {
1068 int error;
1069 struct l_itimerval ls;
1070 struct itimerval aitv;
1071
1072 #ifdef DEBUG
1073 if (ldebug(getitimer))
1074 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
1075 #endif
1076 error = kern_getitimer(td, uap->which, &aitv);
1077 if (error != 0)
1078 return (error);
1079 B2L_ITIMERVAL(&ls, &aitv);
1080 return (copyout(&ls, uap->itv, sizeof(ls)));
1081 }
1082
1083 int
1084 linux_nice(struct thread *td, struct linux_nice_args *args)
1085 {
1086 struct setpriority_args bsd_args;
1087
1088 bsd_args.which = PRIO_PROCESS;
1089 bsd_args.who = 0; /* current process */
1090 bsd_args.prio = args->inc;
1091 return (sys_setpriority(td, &bsd_args));
1092 }
1093
1094 int
1095 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
1096 {
1097 struct ucred *newcred, *oldcred;
1098 l_gid_t *linux_gidset;
1099 gid_t *bsd_gidset;
1100 int ngrp, error;
1101 struct proc *p;
1102
1103 ngrp = args->gidsetsize;
1104 if (ngrp < 0 || ngrp >= ngroups_max + 1)
1105 return (EINVAL);
1106 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
1107 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
1108 if (error)
1109 goto out;
1110 newcred = crget();
1111 crextend(newcred, ngrp + 1);
1112 p = td->td_proc;
1113 PROC_LOCK(p);
1114 oldcred = p->p_ucred;
1115 crcopy(newcred, oldcred);
1116
1117 /*
1118 * cr_groups[0] holds egid. Setting the whole set from
1119 * the supplied set will cause egid to be changed too.
1120 * Keep cr_groups[0] unchanged to prevent that.
1121 */
1122
1123 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
1124 PROC_UNLOCK(p);
1125 crfree(newcred);
1126 goto out;
1127 }
1128
1129 if (ngrp > 0) {
1130 newcred->cr_ngroups = ngrp + 1;
1131
1132 bsd_gidset = newcred->cr_groups;
1133 ngrp--;
1134 while (ngrp >= 0) {
1135 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
1136 ngrp--;
1137 }
1138 } else
1139 newcred->cr_ngroups = 1;
1140
1141 setsugid(p);
1142 p->p_ucred = newcred;
1143 PROC_UNLOCK(p);
1144 crfree(oldcred);
1145 error = 0;
1146 out:
1147 free(linux_gidset, M_TEMP);
1148 return (error);
1149 }
1150
1151 int
1152 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
1153 {
1154 struct ucred *cred;
1155 l_gid_t *linux_gidset;
1156 gid_t *bsd_gidset;
1157 int bsd_gidsetsz, ngrp, error;
1158
1159 cred = td->td_ucred;
1160 bsd_gidset = cred->cr_groups;
1161 bsd_gidsetsz = cred->cr_ngroups - 1;
1162
1163 /*
1164 * cr_groups[0] holds egid. Returning the whole set
1165 * here will cause a duplicate. Exclude cr_groups[0]
1166 * to prevent that.
1167 */
1168
1169 if ((ngrp = args->gidsetsize) == 0) {
1170 td->td_retval[0] = bsd_gidsetsz;
1171 return (0);
1172 }
1173
1174 if (ngrp < bsd_gidsetsz)
1175 return (EINVAL);
1176
1177 ngrp = 0;
1178 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
1179 M_TEMP, M_WAITOK);
1180 while (ngrp < bsd_gidsetsz) {
1181 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1182 ngrp++;
1183 }
1184
1185 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t));
1186 free(linux_gidset, M_TEMP);
1187 if (error)
1188 return (error);
1189
1190 td->td_retval[0] = ngrp;
1191 return (0);
1192 }
1193
1194 int
1195 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
1196 {
1197 struct rlimit bsd_rlim;
1198 struct l_rlimit rlim;
1199 u_int which;
1200 int error;
1201
1202 #ifdef DEBUG
1203 if (ldebug(setrlimit))
1204 printf(ARGS(setrlimit, "%d, %p"),
1205 args->resource, (void *)args->rlim);
1206 #endif
1207
1208 if (args->resource >= LINUX_RLIM_NLIMITS)
1209 return (EINVAL);
1210
1211 which = linux_to_bsd_resource[args->resource];
1212 if (which == -1)
1213 return (EINVAL);
1214
1215 error = copyin(args->rlim, &rlim, sizeof(rlim));
1216 if (error)
1217 return (error);
1218
1219 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
1220 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
1221 return (kern_setrlimit(td, which, &bsd_rlim));
1222 }
1223
1224 int
1225 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
1226 {
1227 struct l_rlimit rlim;
1228 struct proc *p = td->td_proc;
1229 struct rlimit bsd_rlim;
1230 u_int which;
1231
1232 #ifdef DEBUG
1233 if (ldebug(old_getrlimit))
1234 printf(ARGS(old_getrlimit, "%d, %p"),
1235 args->resource, (void *)args->rlim);
1236 #endif
1237
1238 if (args->resource >= LINUX_RLIM_NLIMITS)
1239 return (EINVAL);
1240
1241 which = linux_to_bsd_resource[args->resource];
1242 if (which == -1)
1243 return (EINVAL);
1244
1245 PROC_LOCK(p);
1246 lim_rlimit(p, which, &bsd_rlim);
1247 PROC_UNLOCK(p);
1248
1249 #ifdef COMPAT_LINUX32
1250 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
1251 if (rlim.rlim_cur == UINT_MAX)
1252 rlim.rlim_cur = INT_MAX;
1253 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
1254 if (rlim.rlim_max == UINT_MAX)
1255 rlim.rlim_max = INT_MAX;
1256 #else
1257 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
1258 if (rlim.rlim_cur == ULONG_MAX)
1259 rlim.rlim_cur = LONG_MAX;
1260 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
1261 if (rlim.rlim_max == ULONG_MAX)
1262 rlim.rlim_max = LONG_MAX;
1263 #endif
1264 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1265 }
1266
1267 int
1268 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
1269 {
1270 struct l_rlimit rlim;
1271 struct proc *p = td->td_proc;
1272 struct rlimit bsd_rlim;
1273 u_int which;
1274
1275 #ifdef DEBUG
1276 if (ldebug(getrlimit))
1277 printf(ARGS(getrlimit, "%d, %p"),
1278 args->resource, (void *)args->rlim);
1279 #endif
1280
1281 if (args->resource >= LINUX_RLIM_NLIMITS)
1282 return (EINVAL);
1283
1284 which = linux_to_bsd_resource[args->resource];
1285 if (which == -1)
1286 return (EINVAL);
1287
1288 PROC_LOCK(p);
1289 lim_rlimit(p, which, &bsd_rlim);
1290 PROC_UNLOCK(p);
1291
1292 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
1293 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
1294 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1295 }
1296
1297 int
1298 linux_sched_setscheduler(struct thread *td,
1299 struct linux_sched_setscheduler_args *args)
1300 {
1301 struct sched_setscheduler_args bsd;
1302
1303 #ifdef DEBUG
1304 if (ldebug(sched_setscheduler))
1305 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
1306 args->pid, args->policy, (const void *)args->param);
1307 #endif
1308
1309 switch (args->policy) {
1310 case LINUX_SCHED_OTHER:
1311 bsd.policy = SCHED_OTHER;
1312 break;
1313 case LINUX_SCHED_FIFO:
1314 bsd.policy = SCHED_FIFO;
1315 break;
1316 case LINUX_SCHED_RR:
1317 bsd.policy = SCHED_RR;
1318 break;
1319 default:
1320 return (EINVAL);
1321 }
1322
1323 bsd.pid = args->pid;
1324 bsd.param = (struct sched_param *)args->param;
1325 return (sys_sched_setscheduler(td, &bsd));
1326 }
1327
1328 int
1329 linux_sched_getscheduler(struct thread *td,
1330 struct linux_sched_getscheduler_args *args)
1331 {
1332 struct sched_getscheduler_args bsd;
1333 int error;
1334
1335 #ifdef DEBUG
1336 if (ldebug(sched_getscheduler))
1337 printf(ARGS(sched_getscheduler, "%d"), args->pid);
1338 #endif
1339
1340 bsd.pid = args->pid;
1341 error = sys_sched_getscheduler(td, &bsd);
1342
1343 switch (td->td_retval[0]) {
1344 case SCHED_OTHER:
1345 td->td_retval[0] = LINUX_SCHED_OTHER;
1346 break;
1347 case SCHED_FIFO:
1348 td->td_retval[0] = LINUX_SCHED_FIFO;
1349 break;
1350 case SCHED_RR:
1351 td->td_retval[0] = LINUX_SCHED_RR;
1352 break;
1353 }
1354
1355 return (error);
1356 }
1357
1358 int
1359 linux_sched_get_priority_max(struct thread *td,
1360 struct linux_sched_get_priority_max_args *args)
1361 {
1362 struct sched_get_priority_max_args bsd;
1363
1364 #ifdef DEBUG
1365 if (ldebug(sched_get_priority_max))
1366 printf(ARGS(sched_get_priority_max, "%d"), args->policy);
1367 #endif
1368
1369 switch (args->policy) {
1370 case LINUX_SCHED_OTHER:
1371 bsd.policy = SCHED_OTHER;
1372 break;
1373 case LINUX_SCHED_FIFO:
1374 bsd.policy = SCHED_FIFO;
1375 break;
1376 case LINUX_SCHED_RR:
1377 bsd.policy = SCHED_RR;
1378 break;
1379 default:
1380 return (EINVAL);
1381 }
1382 return (sys_sched_get_priority_max(td, &bsd));
1383 }
1384
1385 int
1386 linux_sched_get_priority_min(struct thread *td,
1387 struct linux_sched_get_priority_min_args *args)
1388 {
1389 struct sched_get_priority_min_args bsd;
1390
1391 #ifdef DEBUG
1392 if (ldebug(sched_get_priority_min))
1393 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
1394 #endif
1395
1396 switch (args->policy) {
1397 case LINUX_SCHED_OTHER:
1398 bsd.policy = SCHED_OTHER;
1399 break;
1400 case LINUX_SCHED_FIFO:
1401 bsd.policy = SCHED_FIFO;
1402 break;
1403 case LINUX_SCHED_RR:
1404 bsd.policy = SCHED_RR;
1405 break;
1406 default:
1407 return (EINVAL);
1408 }
1409 return (sys_sched_get_priority_min(td, &bsd));
1410 }
1411
1412 #define REBOOT_CAD_ON 0x89abcdef
1413 #define REBOOT_CAD_OFF 0
1414 #define REBOOT_HALT 0xcdef0123
1415 #define REBOOT_RESTART 0x01234567
1416 #define REBOOT_RESTART2 0xA1B2C3D4
1417 #define REBOOT_POWEROFF 0x4321FEDC
1418 #define REBOOT_MAGIC1 0xfee1dead
1419 #define REBOOT_MAGIC2 0x28121969
1420 #define REBOOT_MAGIC2A 0x05121996
1421 #define REBOOT_MAGIC2B 0x16041998
1422
1423 int
1424 linux_reboot(struct thread *td, struct linux_reboot_args *args)
1425 {
1426 struct reboot_args bsd_args;
1427
1428 #ifdef DEBUG
1429 if (ldebug(reboot))
1430 printf(ARGS(reboot, "0x%x"), args->cmd);
1431 #endif
1432
1433 if (args->magic1 != REBOOT_MAGIC1)
1434 return (EINVAL);
1435
1436 switch (args->magic2) {
1437 case REBOOT_MAGIC2:
1438 case REBOOT_MAGIC2A:
1439 case REBOOT_MAGIC2B:
1440 break;
1441 default:
1442 return (EINVAL);
1443 }
1444
1445 switch (args->cmd) {
1446 case REBOOT_CAD_ON:
1447 case REBOOT_CAD_OFF:
1448 return (priv_check(td, PRIV_REBOOT));
1449 case REBOOT_HALT:
1450 bsd_args.opt = RB_HALT;
1451 break;
1452 case REBOOT_RESTART:
1453 case REBOOT_RESTART2:
1454 bsd_args.opt = 0;
1455 break;
1456 case REBOOT_POWEROFF:
1457 bsd_args.opt = RB_POWEROFF;
1458 break;
1459 default:
1460 return (EINVAL);
1461 }
1462 return (sys_reboot(td, &bsd_args));
1463 }
1464
1465
1466 /*
1467 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1468 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that
1469 * are assumed to be preserved. The following lightweight syscalls fixes
1470 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c
1471 *
1472 * linux_getpid() - MP SAFE
1473 * linux_getgid() - MP SAFE
1474 * linux_getuid() - MP SAFE
1475 */
1476
1477 int
1478 linux_getpid(struct thread *td, struct linux_getpid_args *args)
1479 {
1480 struct linux_emuldata *em;
1481
1482 #ifdef DEBUG
1483 if (ldebug(getpid))
1484 printf(ARGS(getpid, ""));
1485 #endif
1486
1487 if (linux_use26(td)) {
1488 em = em_find(td->td_proc, EMUL_DONTLOCK);
1489 KASSERT(em != NULL, ("getpid: emuldata not found.\n"));
1490 td->td_retval[0] = em->shared->group_pid;
1491 } else {
1492 td->td_retval[0] = td->td_proc->p_pid;
1493 }
1494
1495 return (0);
1496 }
1497
1498 int
1499 linux_gettid(struct thread *td, struct linux_gettid_args *args)
1500 {
1501
1502 #ifdef DEBUG
1503 if (ldebug(gettid))
1504 printf(ARGS(gettid, ""));
1505 #endif
1506
1507 td->td_retval[0] = td->td_proc->p_pid;
1508 return (0);
1509 }
1510
1511
1512 int
1513 linux_getppid(struct thread *td, struct linux_getppid_args *args)
1514 {
1515 struct linux_emuldata *em;
1516 struct proc *p, *pp;
1517
1518 #ifdef DEBUG
1519 if (ldebug(getppid))
1520 printf(ARGS(getppid, ""));
1521 #endif
1522
1523 if (!linux_use26(td)) {
1524 PROC_LOCK(td->td_proc);
1525 td->td_retval[0] = td->td_proc->p_pptr->p_pid;
1526 PROC_UNLOCK(td->td_proc);
1527 return (0);
1528 }
1529
1530 em = em_find(td->td_proc, EMUL_DONTLOCK);
1531
1532 KASSERT(em != NULL, ("getppid: process emuldata not found.\n"));
1533
1534 /* find the group leader */
1535 p = pfind(em->shared->group_pid);
1536
1537 if (p == NULL) {
1538 #ifdef DEBUG
1539 printf(LMSG("parent process not found.\n"));
1540 #endif
1541 return (0);
1542 }
1543
1544 pp = p->p_pptr; /* switch to parent */
1545 PROC_LOCK(pp);
1546 PROC_UNLOCK(p);
1547
1548 /* if its also linux process */
1549 if (pp->p_sysent == &elf_linux_sysvec) {
1550 em = em_find(pp, EMUL_DONTLOCK);
1551 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n"));
1552
1553 td->td_retval[0] = em->shared->group_pid;
1554 } else
1555 td->td_retval[0] = pp->p_pid;
1556
1557 PROC_UNLOCK(pp);
1558
1559 return (0);
1560 }
1561
1562 int
1563 linux_getgid(struct thread *td, struct linux_getgid_args *args)
1564 {
1565
1566 #ifdef DEBUG
1567 if (ldebug(getgid))
1568 printf(ARGS(getgid, ""));
1569 #endif
1570
1571 td->td_retval[0] = td->td_ucred->cr_rgid;
1572 return (0);
1573 }
1574
1575 int
1576 linux_getuid(struct thread *td, struct linux_getuid_args *args)
1577 {
1578
1579 #ifdef DEBUG
1580 if (ldebug(getuid))
1581 printf(ARGS(getuid, ""));
1582 #endif
1583
1584 td->td_retval[0] = td->td_ucred->cr_ruid;
1585 return (0);
1586 }
1587
1588
1589 int
1590 linux_getsid(struct thread *td, struct linux_getsid_args *args)
1591 {
1592 struct getsid_args bsd;
1593
1594 #ifdef DEBUG
1595 if (ldebug(getsid))
1596 printf(ARGS(getsid, "%i"), args->pid);
1597 #endif
1598
1599 bsd.pid = args->pid;
1600 return (sys_getsid(td, &bsd));
1601 }
1602
1603 int
1604 linux_nosys(struct thread *td, struct nosys_args *ignore)
1605 {
1606
1607 return (ENOSYS);
1608 }
1609
1610 int
1611 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
1612 {
1613 struct getpriority_args bsd_args;
1614 int error;
1615
1616 #ifdef DEBUG
1617 if (ldebug(getpriority))
1618 printf(ARGS(getpriority, "%i, %i"), args->which, args->who);
1619 #endif
1620
1621 bsd_args.which = args->which;
1622 bsd_args.who = args->who;
1623 error = sys_getpriority(td, &bsd_args);
1624 td->td_retval[0] = 20 - td->td_retval[0];
1625 return (error);
1626 }
1627
1628 int
1629 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
1630 {
1631 int name[2];
1632
1633 #ifdef DEBUG
1634 if (ldebug(sethostname))
1635 printf(ARGS(sethostname, "*, %i"), args->len);
1636 #endif
1637
1638 name[0] = CTL_KERN;
1639 name[1] = KERN_HOSTNAME;
1640 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
1641 args->len, 0, 0));
1642 }
1643
1644 int
1645 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args)
1646 {
1647 int name[2];
1648
1649 #ifdef DEBUG
1650 if (ldebug(setdomainname))
1651 printf(ARGS(setdomainname, "*, %i"), args->len);
1652 #endif
1653
1654 name[0] = CTL_KERN;
1655 name[1] = KERN_NISDOMAINNAME;
1656 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name,
1657 args->len, 0, 0));
1658 }
1659
1660 int
1661 linux_exit_group(struct thread *td, struct linux_exit_group_args *args)
1662 {
1663 struct linux_emuldata *em;
1664
1665 #ifdef DEBUG
1666 if (ldebug(exit_group))
1667 printf(ARGS(exit_group, "%i"), args->error_code);
1668 #endif
1669
1670 em = em_find(td->td_proc, EMUL_DONTLOCK);
1671 if (em->shared->refs > 1) {
1672 EMUL_SHARED_WLOCK(&emul_shared_lock);
1673 em->shared->flags |= EMUL_SHARED_HASXSTAT;
1674 em->shared->xstat = W_EXITCODE(args->error_code, 0);
1675 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
1676 if (linux_use26(td))
1677 linux_kill_threads(td, SIGKILL);
1678 }
1679
1680 /*
1681 * XXX: we should send a signal to the parent if
1682 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?)
1683 * as it doesnt occur often.
1684 */
1685 exit1(td, W_EXITCODE(args->error_code, 0));
1686
1687 return (0);
1688 }
1689
1690 #define _LINUX_CAPABILITY_VERSION 0x19980330
1691
1692 struct l_user_cap_header {
1693 l_int version;
1694 l_int pid;
1695 };
1696
1697 struct l_user_cap_data {
1698 l_int effective;
1699 l_int permitted;
1700 l_int inheritable;
1701 };
1702
1703 int
1704 linux_capget(struct thread *td, struct linux_capget_args *args)
1705 {
1706 struct l_user_cap_header luch;
1707 struct l_user_cap_data lucd;
1708 int error;
1709
1710 if (args->hdrp == NULL)
1711 return (EFAULT);
1712
1713 error = copyin(args->hdrp, &luch, sizeof(luch));
1714 if (error != 0)
1715 return (error);
1716
1717 if (luch.version != _LINUX_CAPABILITY_VERSION) {
1718 luch.version = _LINUX_CAPABILITY_VERSION;
1719 error = copyout(&luch, args->hdrp, sizeof(luch));
1720 if (error)
1721 return (error);
1722 return (EINVAL);
1723 }
1724
1725 if (luch.pid)
1726 return (EPERM);
1727
1728 if (args->datap) {
1729 /*
1730 * The current implementation doesn't support setting
1731 * a capability (it's essentially a stub) so indicate
1732 * that no capabilities are currently set or available
1733 * to request.
1734 */
1735 bzero (&lucd, sizeof(lucd));
1736 error = copyout(&lucd, args->datap, sizeof(lucd));
1737 }
1738
1739 return (error);
1740 }
1741
1742 int
1743 linux_capset(struct thread *td, struct linux_capset_args *args)
1744 {
1745 struct l_user_cap_header luch;
1746 struct l_user_cap_data lucd;
1747 int error;
1748
1749 if (args->hdrp == NULL || args->datap == NULL)
1750 return (EFAULT);
1751
1752 error = copyin(args->hdrp, &luch, sizeof(luch));
1753 if (error != 0)
1754 return (error);
1755
1756 if (luch.version != _LINUX_CAPABILITY_VERSION) {
1757 luch.version = _LINUX_CAPABILITY_VERSION;
1758 error = copyout(&luch, args->hdrp, sizeof(luch));
1759 if (error)
1760 return (error);
1761 return (EINVAL);
1762 }
1763
1764 if (luch.pid)
1765 return (EPERM);
1766
1767 error = copyin(args->datap, &lucd, sizeof(lucd));
1768 if (error != 0)
1769 return (error);
1770
1771 /* We currently don't support setting any capabilities. */
1772 if (lucd.effective || lucd.permitted || lucd.inheritable) {
1773 linux_msg(td,
1774 "capset effective=0x%x, permitted=0x%x, "
1775 "inheritable=0x%x is not implemented",
1776 (int)lucd.effective, (int)lucd.permitted,
1777 (int)lucd.inheritable);
1778 return (EPERM);
1779 }
1780
1781 return (0);
1782 }
1783
1784 int
1785 linux_prctl(struct thread *td, struct linux_prctl_args *args)
1786 {
1787 int error = 0, max_size;
1788 struct proc *p = td->td_proc;
1789 char comm[LINUX_MAX_COMM_LEN];
1790 struct linux_emuldata *em;
1791 int pdeath_signal;
1792
1793 #ifdef DEBUG
1794 if (ldebug(prctl))
1795 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option,
1796 args->arg2, args->arg3, args->arg4, args->arg5);
1797 #endif
1798
1799 switch (args->option) {
1800 case LINUX_PR_SET_PDEATHSIG:
1801 if (!LINUX_SIG_VALID(args->arg2))
1802 return (EINVAL);
1803 em = em_find(p, EMUL_DOLOCK);
1804 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1805 em->pdeath_signal = args->arg2;
1806 EMUL_UNLOCK(&emul_lock);
1807 break;
1808 case LINUX_PR_GET_PDEATHSIG:
1809 em = em_find(p, EMUL_DOLOCK);
1810 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
1811 pdeath_signal = em->pdeath_signal;
1812 EMUL_UNLOCK(&emul_lock);
1813 error = copyout(&pdeath_signal,
1814 (void *)(register_t)args->arg2,
1815 sizeof(pdeath_signal));
1816 break;
1817 case LINUX_PR_GET_KEEPCAPS:
1818 /*
1819 * Indicate that we always clear the effective and
1820 * permitted capability sets when the user id becomes
1821 * non-zero (actually the capability sets are simply
1822 * always zero in the current implementation).
1823 */
1824 td->td_retval[0] = 0;
1825 break;
1826 case LINUX_PR_SET_KEEPCAPS:
1827 /*
1828 * Ignore requests to keep the effective and permitted
1829 * capability sets when the user id becomes non-zero.
1830 */
1831 break;
1832 case LINUX_PR_SET_NAME:
1833 /*
1834 * To be on the safe side we need to make sure to not
1835 * overflow the size a linux program expects. We already
1836 * do this here in the copyin, so that we don't need to
1837 * check on copyout.
1838 */
1839 max_size = MIN(sizeof(comm), sizeof(p->p_comm));
1840 error = copyinstr((void *)(register_t)args->arg2, comm,
1841 max_size, NULL);
1842
1843 /* Linux silently truncates the name if it is too long. */
1844 if (error == ENAMETOOLONG) {
1845 /*
1846 * XXX: copyinstr() isn't documented to populate the
1847 * array completely, so do a copyin() to be on the
1848 * safe side. This should be changed in case
1849 * copyinstr() is changed to guarantee this.
1850 */
1851 error = copyin((void *)(register_t)args->arg2, comm,
1852 max_size - 1);
1853 comm[max_size - 1] = '\0';
1854 }
1855 if (error)
1856 return (error);
1857
1858 PROC_LOCK(p);
1859 strlcpy(p->p_comm, comm, sizeof(p->p_comm));
1860 PROC_UNLOCK(p);
1861 break;
1862 case LINUX_PR_GET_NAME:
1863 PROC_LOCK(p);
1864 strlcpy(comm, p->p_comm, sizeof(comm));
1865 PROC_UNLOCK(p);
1866 error = copyout(comm, (void *)(register_t)args->arg2,
1867 strlen(comm) + 1);
1868 break;
1869 default:
1870 error = EINVAL;
1871 break;
1872 }
1873
1874 return (error);
1875 }
1876
1877 /*
1878 * Get affinity of a process.
1879 */
1880 int
1881 linux_sched_getaffinity(struct thread *td,
1882 struct linux_sched_getaffinity_args *args)
1883 {
1884 int error;
1885 struct cpuset_getaffinity_args cga;
1886
1887 #ifdef DEBUG
1888 if (ldebug(sched_getaffinity))
1889 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid,
1890 args->len);
1891 #endif
1892 if (args->len < sizeof(cpuset_t))
1893 return (EINVAL);
1894
1895 cga.level = CPU_LEVEL_WHICH;
1896 cga.which = CPU_WHICH_PID;
1897 cga.id = args->pid;
1898 cga.cpusetsize = sizeof(cpuset_t);
1899 cga.mask = (cpuset_t *) args->user_mask_ptr;
1900
1901 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0)
1902 td->td_retval[0] = sizeof(cpuset_t);
1903
1904 return (error);
1905 }
1906
1907 /*
1908 * Set affinity of a process.
1909 */
1910 int
1911 linux_sched_setaffinity(struct thread *td,
1912 struct linux_sched_setaffinity_args *args)
1913 {
1914 struct cpuset_setaffinity_args csa;
1915
1916 #ifdef DEBUG
1917 if (ldebug(sched_setaffinity))
1918 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid,
1919 args->len);
1920 #endif
1921 if (args->len < sizeof(cpuset_t))
1922 return (EINVAL);
1923
1924 csa.level = CPU_LEVEL_WHICH;
1925 csa.which = CPU_WHICH_PID;
1926 csa.id = args->pid;
1927 csa.cpusetsize = sizeof(cpuset_t);
1928 csa.mask = (cpuset_t *) args->user_mask_ptr;
1929
1930 return (sys_cpuset_setaffinity(td, &csa));
1931 }
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