linux_misc.c revision 293538
1/*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 1994-1995 S��ren 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: stable/10/sys/compat/linux/linux_misc.c 293538 2016-01-09 16:27:33Z dchagin $"); 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/** 98 * Special DTrace provider for the linuxulator. 99 * 100 * In this file we define the provider for the entire linuxulator. All 101 * modules (= files of the linuxulator) use it. 102 * 103 * We define a different name depending on the emulated bitsize, see 104 * ../../<ARCH>/linux{,32}/linux.h, e.g.: 105 * native bitsize = linuxulator 106 * amd64, 32bit emulation = linuxulator32 107 */ 108LIN_SDT_PROVIDER_DEFINE(LINUX_DTRACE); 109 110int stclohz; /* Statistics clock frequency */ 111 112static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 113 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 114 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 115 RLIMIT_MEMLOCK, RLIMIT_AS 116}; 117 118struct l_sysinfo { 119 l_long uptime; /* Seconds since boot */ 120 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 121#define LINUX_SYSINFO_LOADS_SCALE 65536 122 l_ulong totalram; /* Total usable main memory size */ 123 l_ulong freeram; /* Available memory size */ 124 l_ulong sharedram; /* Amount of shared memory */ 125 l_ulong bufferram; /* Memory used by buffers */ 126 l_ulong totalswap; /* Total swap space size */ 127 l_ulong freeswap; /* swap space still available */ 128 l_ushort procs; /* Number of current processes */ 129 l_ushort pads; 130 l_ulong totalbig; 131 l_ulong freebig; 132 l_uint mem_unit; 133 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 134}; 135 136struct l_pselect6arg { 137 l_uintptr_t ss; 138 l_size_t ss_len; 139}; 140 141int 142linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 143{ 144 struct l_sysinfo sysinfo; 145 vm_object_t object; 146 int i, j; 147 struct timespec ts; 148 149 getnanouptime(&ts); 150 if (ts.tv_nsec != 0) 151 ts.tv_sec++; 152 sysinfo.uptime = ts.tv_sec; 153 154 /* Use the information from the mib to get our load averages */ 155 for (i = 0; i < 3; i++) 156 sysinfo.loads[i] = averunnable.ldavg[i] * 157 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 158 159 sysinfo.totalram = physmem * PAGE_SIZE; 160 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 161 162 sysinfo.sharedram = 0; 163 mtx_lock(&vm_object_list_mtx); 164 TAILQ_FOREACH(object, &vm_object_list, object_list) 165 if (object->shadow_count > 1) 166 sysinfo.sharedram += object->resident_page_count; 167 mtx_unlock(&vm_object_list_mtx); 168 169 sysinfo.sharedram *= PAGE_SIZE; 170 sysinfo.bufferram = 0; 171 172 swap_pager_status(&i, &j); 173 sysinfo.totalswap = i * PAGE_SIZE; 174 sysinfo.freeswap = (i - j) * PAGE_SIZE; 175 176 sysinfo.procs = nprocs; 177 178 /* The following are only present in newer Linux kernels. */ 179 sysinfo.totalbig = 0; 180 sysinfo.freebig = 0; 181 sysinfo.mem_unit = 1; 182 183 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 184} 185 186int 187linux_alarm(struct thread *td, struct linux_alarm_args *args) 188{ 189 struct itimerval it, old_it; 190 u_int secs; 191 int error; 192 193#ifdef DEBUG 194 if (ldebug(alarm)) 195 printf(ARGS(alarm, "%u"), args->secs); 196#endif 197 198 secs = args->secs; 199 200 if (secs > INT_MAX) 201 secs = INT_MAX; 202 203 it.it_value.tv_sec = (long) secs; 204 it.it_value.tv_usec = 0; 205 it.it_interval.tv_sec = 0; 206 it.it_interval.tv_usec = 0; 207 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 208 if (error) 209 return (error); 210 if (timevalisset(&old_it.it_value)) { 211 if (old_it.it_value.tv_usec != 0) 212 old_it.it_value.tv_sec++; 213 td->td_retval[0] = old_it.it_value.tv_sec; 214 } 215 return (0); 216} 217 218int 219linux_brk(struct thread *td, struct linux_brk_args *args) 220{ 221 struct vmspace *vm = td->td_proc->p_vmspace; 222 vm_offset_t new, old; 223 struct obreak_args /* { 224 char * nsize; 225 } */ tmp; 226 227#ifdef DEBUG 228 if (ldebug(brk)) 229 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 230#endif 231 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 232 new = (vm_offset_t)args->dsend; 233 tmp.nsize = (char *)new; 234 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 235 td->td_retval[0] = (long)new; 236 else 237 td->td_retval[0] = (long)old; 238 239 return (0); 240} 241 242#if defined(__i386__) 243/* XXX: what about amd64/linux32? */ 244 245int 246linux_uselib(struct thread *td, struct linux_uselib_args *args) 247{ 248 struct nameidata ni; 249 struct vnode *vp; 250 struct exec *a_out; 251 struct vattr attr; 252 vm_offset_t vmaddr; 253 unsigned long file_offset; 254 unsigned long bss_size; 255 char *library; 256 ssize_t aresid; 257 int error, locked, writecount; 258 259 LCONVPATHEXIST(td, args->library, &library); 260 261#ifdef DEBUG 262 if (ldebug(uselib)) 263 printf(ARGS(uselib, "%s"), library); 264#endif 265 266 a_out = NULL; 267 locked = 0; 268 vp = NULL; 269 270 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1, 271 UIO_SYSSPACE, library, td); 272 error = namei(&ni); 273 LFREEPATH(library); 274 if (error) 275 goto cleanup; 276 277 vp = ni.ni_vp; 278 NDFREE(&ni, NDF_ONLY_PNBUF); 279 280 /* 281 * From here on down, we have a locked vnode that must be unlocked. 282 * XXX: The code below largely duplicates exec_check_permissions(). 283 */ 284 locked = 1; 285 286 /* Writable? */ 287 error = VOP_GET_WRITECOUNT(vp, &writecount); 288 if (error != 0) 289 goto cleanup; 290 if (writecount != 0) { 291 error = ETXTBSY; 292 goto cleanup; 293 } 294 295 /* Executable? */ 296 error = VOP_GETATTR(vp, &attr, td->td_ucred); 297 if (error) 298 goto cleanup; 299 300 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 301 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 302 /* EACCESS is what exec(2) returns. */ 303 error = ENOEXEC; 304 goto cleanup; 305 } 306 307 /* Sensible size? */ 308 if (attr.va_size == 0) { 309 error = ENOEXEC; 310 goto cleanup; 311 } 312 313 /* Can we access it? */ 314 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 315 if (error) 316 goto cleanup; 317 318 /* 319 * XXX: This should use vn_open() so that it is properly authorized, 320 * and to reduce code redundancy all over the place here. 321 * XXX: Not really, it duplicates far more of exec_check_permissions() 322 * than vn_open(). 323 */ 324#ifdef MAC 325 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 326 if (error) 327 goto cleanup; 328#endif 329 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 330 if (error) 331 goto cleanup; 332 333 /* Pull in executable header into exec_map */ 334 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 335 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 336 if (error) 337 goto cleanup; 338 339 /* Is it a Linux binary ? */ 340 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 341 error = ENOEXEC; 342 goto cleanup; 343 } 344 345 /* 346 * While we are here, we should REALLY do some more checks 347 */ 348 349 /* Set file/virtual offset based on a.out variant. */ 350 switch ((int)(a_out->a_magic & 0xffff)) { 351 case 0413: /* ZMAGIC */ 352 file_offset = 1024; 353 break; 354 case 0314: /* QMAGIC */ 355 file_offset = 0; 356 break; 357 default: 358 error = ENOEXEC; 359 goto cleanup; 360 } 361 362 bss_size = round_page(a_out->a_bss); 363 364 /* Check various fields in header for validity/bounds. */ 365 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 366 error = ENOEXEC; 367 goto cleanup; 368 } 369 370 /* text + data can't exceed file size */ 371 if (a_out->a_data + a_out->a_text > attr.va_size) { 372 error = EFAULT; 373 goto cleanup; 374 } 375 376 /* 377 * text/data/bss must not exceed limits 378 * XXX - this is not complete. it should check current usage PLUS 379 * the resources needed by this library. 380 */ 381 PROC_LOCK(td->td_proc); 382 if (a_out->a_text > maxtsiz || 383 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) || 384 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 385 bss_size) != 0) { 386 PROC_UNLOCK(td->td_proc); 387 error = ENOMEM; 388 goto cleanup; 389 } 390 PROC_UNLOCK(td->td_proc); 391 392 /* 393 * Prevent more writers. 394 * XXX: Note that if any of the VM operations fail below we don't 395 * clear this flag. 396 */ 397 VOP_SET_TEXT(vp); 398 399 /* 400 * Lock no longer needed 401 */ 402 locked = 0; 403 VOP_UNLOCK(vp, 0); 404 405 /* 406 * Check if file_offset page aligned. Currently we cannot handle 407 * misalinged file offsets, and so we read in the entire image 408 * (what a waste). 409 */ 410 if (file_offset & PAGE_MASK) { 411#ifdef DEBUG 412 printf("uselib: Non page aligned binary %lu\n", file_offset); 413#endif 414 /* Map text+data read/write/execute */ 415 416 /* a_entry is the load address and is page aligned */ 417 vmaddr = trunc_page(a_out->a_entry); 418 419 /* get anon user mapping, read+write+execute */ 420 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 421 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE, 422 VM_PROT_ALL, VM_PROT_ALL, 0); 423 if (error) 424 goto cleanup; 425 426 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 427 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 428 td->td_ucred, NOCRED, &aresid, td); 429 if (error != 0) 430 goto cleanup; 431 if (aresid != 0) { 432 error = ENOEXEC; 433 goto cleanup; 434 } 435 } else { 436#ifdef DEBUG 437 printf("uselib: Page aligned binary %lu\n", file_offset); 438#endif 439 /* 440 * for QMAGIC, a_entry is 20 bytes beyond the load address 441 * to skip the executable header 442 */ 443 vmaddr = trunc_page(a_out->a_entry); 444 445 /* 446 * Map it all into the process's space as a single 447 * copy-on-write "data" segment. 448 */ 449 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 450 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 451 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 452 if (error) 453 goto cleanup; 454 } 455#ifdef DEBUG 456 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 457 ((long *)vmaddr)[1]); 458#endif 459 if (bss_size != 0) { 460 /* Calculate BSS start address */ 461 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 462 a_out->a_data; 463 464 /* allocate some 'anon' space */ 465 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 466 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, 467 VM_PROT_ALL, 0); 468 if (error) 469 goto cleanup; 470 } 471 472cleanup: 473 /* Unlock vnode if needed */ 474 if (locked) 475 VOP_UNLOCK(vp, 0); 476 477 /* Release the temporary mapping. */ 478 if (a_out) 479 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 480 481 return (error); 482} 483 484#endif /* __i386__ */ 485 486int 487linux_select(struct thread *td, struct linux_select_args *args) 488{ 489 l_timeval ltv; 490 struct timeval tv0, tv1, utv, *tvp; 491 int error; 492 493#ifdef DEBUG 494 if (ldebug(select)) 495 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 496 (void *)args->readfds, (void *)args->writefds, 497 (void *)args->exceptfds, (void *)args->timeout); 498#endif 499 500 /* 501 * Store current time for computation of the amount of 502 * time left. 503 */ 504 if (args->timeout) { 505 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 506 goto select_out; 507 utv.tv_sec = ltv.tv_sec; 508 utv.tv_usec = ltv.tv_usec; 509#ifdef DEBUG 510 if (ldebug(select)) 511 printf(LMSG("incoming timeout (%jd/%ld)"), 512 (intmax_t)utv.tv_sec, utv.tv_usec); 513#endif 514 515 if (itimerfix(&utv)) { 516 /* 517 * The timeval was invalid. Convert it to something 518 * valid that will act as it does under Linux. 519 */ 520 utv.tv_sec += utv.tv_usec / 1000000; 521 utv.tv_usec %= 1000000; 522 if (utv.tv_usec < 0) { 523 utv.tv_sec -= 1; 524 utv.tv_usec += 1000000; 525 } 526 if (utv.tv_sec < 0) 527 timevalclear(&utv); 528 } 529 microtime(&tv0); 530 tvp = &utv; 531 } else 532 tvp = NULL; 533 534 error = kern_select(td, args->nfds, args->readfds, args->writefds, 535 args->exceptfds, tvp, sizeof(l_int) * 8); 536 537#ifdef DEBUG 538 if (ldebug(select)) 539 printf(LMSG("real select returns %d"), error); 540#endif 541 if (error) 542 goto select_out; 543 544 if (args->timeout) { 545 if (td->td_retval[0]) { 546 /* 547 * Compute how much time was left of the timeout, 548 * by subtracting the current time and the time 549 * before we started the call, and subtracting 550 * that result from the user-supplied value. 551 */ 552 microtime(&tv1); 553 timevalsub(&tv1, &tv0); 554 timevalsub(&utv, &tv1); 555 if (utv.tv_sec < 0) 556 timevalclear(&utv); 557 } else 558 timevalclear(&utv); 559#ifdef DEBUG 560 if (ldebug(select)) 561 printf(LMSG("outgoing timeout (%jd/%ld)"), 562 (intmax_t)utv.tv_sec, utv.tv_usec); 563#endif 564 ltv.tv_sec = utv.tv_sec; 565 ltv.tv_usec = utv.tv_usec; 566 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 567 goto select_out; 568 } 569 570select_out: 571#ifdef DEBUG 572 if (ldebug(select)) 573 printf(LMSG("select_out -> %d"), error); 574#endif 575 return (error); 576} 577 578int 579linux_mremap(struct thread *td, struct linux_mremap_args *args) 580{ 581 struct munmap_args /* { 582 void *addr; 583 size_t len; 584 } */ bsd_args; 585 int error = 0; 586 587#ifdef DEBUG 588 if (ldebug(mremap)) 589 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 590 (void *)(uintptr_t)args->addr, 591 (unsigned long)args->old_len, 592 (unsigned long)args->new_len, 593 (unsigned long)args->flags); 594#endif 595 596 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 597 td->td_retval[0] = 0; 598 return (EINVAL); 599 } 600 601 /* 602 * Check for the page alignment. 603 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 604 */ 605 if (args->addr & PAGE_MASK) { 606 td->td_retval[0] = 0; 607 return (EINVAL); 608 } 609 610 args->new_len = round_page(args->new_len); 611 args->old_len = round_page(args->old_len); 612 613 if (args->new_len > args->old_len) { 614 td->td_retval[0] = 0; 615 return (ENOMEM); 616 } 617 618 if (args->new_len < args->old_len) { 619 bsd_args.addr = 620 (caddr_t)((uintptr_t)args->addr + args->new_len); 621 bsd_args.len = args->old_len - args->new_len; 622 error = sys_munmap(td, &bsd_args); 623 } 624 625 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 626 return (error); 627} 628 629#define LINUX_MS_ASYNC 0x0001 630#define LINUX_MS_INVALIDATE 0x0002 631#define LINUX_MS_SYNC 0x0004 632 633int 634linux_msync(struct thread *td, struct linux_msync_args *args) 635{ 636 struct msync_args bsd_args; 637 638 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 639 bsd_args.len = (uintptr_t)args->len; 640 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 641 642 return (sys_msync(td, &bsd_args)); 643} 644 645int 646linux_time(struct thread *td, struct linux_time_args *args) 647{ 648 struct timeval tv; 649 l_time_t tm; 650 int error; 651 652#ifdef DEBUG 653 if (ldebug(time)) 654 printf(ARGS(time, "*")); 655#endif 656 657 microtime(&tv); 658 tm = tv.tv_sec; 659 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 660 return (error); 661 td->td_retval[0] = tm; 662 return (0); 663} 664 665struct l_times_argv { 666 l_clock_t tms_utime; 667 l_clock_t tms_stime; 668 l_clock_t tms_cutime; 669 l_clock_t tms_cstime; 670}; 671 672 673/* 674 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 675 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 676 * auxiliary vector entry. 677 */ 678#define CLK_TCK 100 679 680#define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 681#define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 682 683#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 684 CONVNTCK(r) : CONVOTCK(r)) 685 686int 687linux_times(struct thread *td, struct linux_times_args *args) 688{ 689 struct timeval tv, utime, stime, cutime, cstime; 690 struct l_times_argv tms; 691 struct proc *p; 692 int error; 693 694#ifdef DEBUG 695 if (ldebug(times)) 696 printf(ARGS(times, "*")); 697#endif 698 699 if (args->buf != NULL) { 700 p = td->td_proc; 701 PROC_LOCK(p); 702 PROC_STATLOCK(p); 703 calcru(p, &utime, &stime); 704 PROC_STATUNLOCK(p); 705 calccru(p, &cutime, &cstime); 706 PROC_UNLOCK(p); 707 708 tms.tms_utime = CONVTCK(utime); 709 tms.tms_stime = CONVTCK(stime); 710 711 tms.tms_cutime = CONVTCK(cutime); 712 tms.tms_cstime = CONVTCK(cstime); 713 714 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 715 return (error); 716 } 717 718 microuptime(&tv); 719 td->td_retval[0] = (int)CONVTCK(tv); 720 return (0); 721} 722 723int 724linux_newuname(struct thread *td, struct linux_newuname_args *args) 725{ 726 struct l_new_utsname utsname; 727 char osname[LINUX_MAX_UTSNAME]; 728 char osrelease[LINUX_MAX_UTSNAME]; 729 char *p; 730 731#ifdef DEBUG 732 if (ldebug(newuname)) 733 printf(ARGS(newuname, "*")); 734#endif 735 736 linux_get_osname(td, osname); 737 linux_get_osrelease(td, osrelease); 738 739 bzero(&utsname, sizeof(utsname)); 740 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 741 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 742 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 743 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 744 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 745 for (p = utsname.version; *p != '\0'; ++p) 746 if (*p == '\n') { 747 *p = '\0'; 748 break; 749 } 750 strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME); 751 752 return (copyout(&utsname, args->buf, sizeof(utsname))); 753} 754 755struct l_utimbuf { 756 l_time_t l_actime; 757 l_time_t l_modtime; 758}; 759 760int 761linux_utime(struct thread *td, struct linux_utime_args *args) 762{ 763 struct timeval tv[2], *tvp; 764 struct l_utimbuf lut; 765 char *fname; 766 int error; 767 768 LCONVPATHEXIST(td, args->fname, &fname); 769 770#ifdef DEBUG 771 if (ldebug(utime)) 772 printf(ARGS(utime, "%s, *"), fname); 773#endif 774 775 if (args->times) { 776 if ((error = copyin(args->times, &lut, sizeof lut))) { 777 LFREEPATH(fname); 778 return (error); 779 } 780 tv[0].tv_sec = lut.l_actime; 781 tv[0].tv_usec = 0; 782 tv[1].tv_sec = lut.l_modtime; 783 tv[1].tv_usec = 0; 784 tvp = tv; 785 } else 786 tvp = NULL; 787 788 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 789 LFREEPATH(fname); 790 return (error); 791} 792 793int 794linux_utimes(struct thread *td, struct linux_utimes_args *args) 795{ 796 l_timeval ltv[2]; 797 struct timeval tv[2], *tvp = NULL; 798 char *fname; 799 int error; 800 801 LCONVPATHEXIST(td, args->fname, &fname); 802 803#ifdef DEBUG 804 if (ldebug(utimes)) 805 printf(ARGS(utimes, "%s, *"), fname); 806#endif 807 808 if (args->tptr != NULL) { 809 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 810 LFREEPATH(fname); 811 return (error); 812 } 813 tv[0].tv_sec = ltv[0].tv_sec; 814 tv[0].tv_usec = ltv[0].tv_usec; 815 tv[1].tv_sec = ltv[1].tv_sec; 816 tv[1].tv_usec = ltv[1].tv_usec; 817 tvp = tv; 818 } 819 820 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 821 LFREEPATH(fname); 822 return (error); 823} 824 825int 826linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 827{ 828 l_timeval ltv[2]; 829 struct timeval tv[2], *tvp = NULL; 830 char *fname; 831 int error, dfd; 832 833 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 834 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 835 836#ifdef DEBUG 837 if (ldebug(futimesat)) 838 printf(ARGS(futimesat, "%s, *"), fname); 839#endif 840 841 if (args->utimes != NULL) { 842 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 843 LFREEPATH(fname); 844 return (error); 845 } 846 tv[0].tv_sec = ltv[0].tv_sec; 847 tv[0].tv_usec = ltv[0].tv_usec; 848 tv[1].tv_sec = ltv[1].tv_sec; 849 tv[1].tv_usec = ltv[1].tv_usec; 850 tvp = tv; 851 } 852 853 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 854 LFREEPATH(fname); 855 return (error); 856} 857 858int 859linux_common_wait(struct thread *td, int pid, int *status, 860 int options, struct rusage *ru) 861{ 862 int error, tmpstat; 863 864 error = kern_wait(td, pid, &tmpstat, options, ru); 865 if (error) 866 return (error); 867 868 if (status) { 869 tmpstat &= 0xffff; 870 if (WIFSIGNALED(tmpstat)) 871 tmpstat = (tmpstat & 0xffffff80) | 872 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 873 else if (WIFSTOPPED(tmpstat)) 874 tmpstat = (tmpstat & 0xffff00ff) | 875 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 876 else if (WIFCONTINUED(tmpstat)) 877 tmpstat = 0xffff; 878 error = copyout(&tmpstat, status, sizeof(int)); 879 } 880 881 return (error); 882} 883 884#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 885int 886linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 887{ 888 int options; 889 890#ifdef DEBUG 891 if (ldebug(waitpid)) 892 printf(ARGS(waitpid, "%d, %p, %d"), 893 args->pid, (void *)args->status, args->options); 894#endif 895 /* 896 * this is necessary because the test in kern_wait doesn't work 897 * because we mess with the options here 898 */ 899 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) 900 return (EINVAL); 901 902 options = (args->options & (WNOHANG | WUNTRACED)); 903 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 904 if (args->options & __WCLONE) 905 options |= WLINUXCLONE; 906 907 return (linux_common_wait(td, args->pid, args->status, options, NULL)); 908} 909#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 910 911int 912linux_wait4(struct thread *td, struct linux_wait4_args *args) 913{ 914 int error, options; 915 struct rusage ru, *rup; 916 917#ifdef DEBUG 918 if (ldebug(wait4)) 919 printf(ARGS(wait4, "%d, %p, %d, %p"), 920 args->pid, (void *)args->status, args->options, 921 (void *)args->rusage); 922#endif 923 924 options = (args->options & (WNOHANG | WUNTRACED)); 925 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 926 if (args->options & __WCLONE) 927 options |= WLINUXCLONE; 928 929 if (args->rusage != NULL) 930 rup = &ru; 931 else 932 rup = NULL; 933 error = linux_common_wait(td, args->pid, args->status, options, rup); 934 if (error != 0) 935 return (error); 936 if (args->rusage != NULL) 937 error = linux_copyout_rusage(&ru, args->rusage); 938 return (error); 939} 940 941int 942linux_waitid(struct thread *td, struct linux_waitid_args *args) 943{ 944 int status, options, sig; 945 struct __wrusage wru; 946 siginfo_t siginfo; 947 l_siginfo_t lsi; 948 idtype_t idtype; 949 struct proc *p; 950 int error; 951 952 options = 0; 953 linux_to_bsd_waitopts(args->options, &options); 954 955 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 956 return (EINVAL); 957 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 958 return (EINVAL); 959 960 switch (args->idtype) { 961 case LINUX_P_ALL: 962 idtype = P_ALL; 963 break; 964 case LINUX_P_PID: 965 if (args->id <= 0) 966 return (EINVAL); 967 idtype = P_PID; 968 break; 969 case LINUX_P_PGID: 970 if (args->id <= 0) 971 return (EINVAL); 972 idtype = P_PGID; 973 break; 974 default: 975 return (EINVAL); 976 } 977 978 error = kern_wait6(td, idtype, args->id, &status, options, 979 &wru, &siginfo); 980 if (error != 0) 981 return (error); 982 if (args->rusage != NULL) { 983 error = linux_copyout_rusage(&wru.wru_children, 984 args->rusage); 985 if (error != 0) 986 return (error); 987 } 988 if (args->info != NULL) { 989 p = td->td_proc; 990 if (td->td_retval[0] == 0) 991 bzero(&lsi, sizeof(lsi)); 992 else { 993 sig = BSD_TO_LINUX_SIGNAL(siginfo.si_signo); 994 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 995 } 996 error = copyout(&lsi, args->info, sizeof(lsi)); 997 } 998 td->td_retval[0] = 0; 999 1000 return (error); 1001} 1002 1003int 1004linux_mknod(struct thread *td, struct linux_mknod_args *args) 1005{ 1006 char *path; 1007 int error; 1008 1009 LCONVPATHCREAT(td, args->path, &path); 1010 1011#ifdef DEBUG 1012 if (ldebug(mknod)) 1013 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1014 (uintmax_t)args->dev); 1015#endif 1016 1017 switch (args->mode & S_IFMT) { 1018 case S_IFIFO: 1019 case S_IFSOCK: 1020 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 1021 break; 1022 1023 case S_IFCHR: 1024 case S_IFBLK: 1025 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 1026 args->dev); 1027 break; 1028 1029 case S_IFDIR: 1030 error = EPERM; 1031 break; 1032 1033 case 0: 1034 args->mode |= S_IFREG; 1035 /* FALLTHROUGH */ 1036 case S_IFREG: 1037 error = kern_open(td, path, UIO_SYSSPACE, 1038 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1039 if (error == 0) 1040 kern_close(td, td->td_retval[0]); 1041 break; 1042 1043 default: 1044 error = EINVAL; 1045 break; 1046 } 1047 LFREEPATH(path); 1048 return (error); 1049} 1050 1051int 1052linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1053{ 1054 char *path; 1055 int error, dfd; 1056 1057 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1058 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1059 1060#ifdef DEBUG 1061 if (ldebug(mknodat)) 1062 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1063#endif 1064 1065 switch (args->mode & S_IFMT) { 1066 case S_IFIFO: 1067 case S_IFSOCK: 1068 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1069 break; 1070 1071 case S_IFCHR: 1072 case S_IFBLK: 1073 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1074 args->dev); 1075 break; 1076 1077 case S_IFDIR: 1078 error = EPERM; 1079 break; 1080 1081 case 0: 1082 args->mode |= S_IFREG; 1083 /* FALLTHROUGH */ 1084 case S_IFREG: 1085 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1086 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1087 if (error == 0) 1088 kern_close(td, td->td_retval[0]); 1089 break; 1090 1091 default: 1092 error = EINVAL; 1093 break; 1094 } 1095 LFREEPATH(path); 1096 return (error); 1097} 1098 1099/* 1100 * UGH! This is just about the dumbest idea I've ever heard!! 1101 */ 1102int 1103linux_personality(struct thread *td, struct linux_personality_args *args) 1104{ 1105#ifdef DEBUG 1106 if (ldebug(personality)) 1107 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1108#endif 1109 if (args->per != 0) 1110 return (EINVAL); 1111 1112 /* Yes Jim, it's still a Linux... */ 1113 td->td_retval[0] = 0; 1114 return (0); 1115} 1116 1117struct l_itimerval { 1118 l_timeval it_interval; 1119 l_timeval it_value; 1120}; 1121 1122#define B2L_ITIMERVAL(bip, lip) \ 1123 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1124 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1125 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1126 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1127 1128int 1129linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1130{ 1131 int error; 1132 struct l_itimerval ls; 1133 struct itimerval aitv, oitv; 1134 1135#ifdef DEBUG 1136 if (ldebug(setitimer)) 1137 printf(ARGS(setitimer, "%p, %p"), 1138 (void *)uap->itv, (void *)uap->oitv); 1139#endif 1140 1141 if (uap->itv == NULL) { 1142 uap->itv = uap->oitv; 1143 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1144 } 1145 1146 error = copyin(uap->itv, &ls, sizeof(ls)); 1147 if (error != 0) 1148 return (error); 1149 B2L_ITIMERVAL(&aitv, &ls); 1150#ifdef DEBUG 1151 if (ldebug(setitimer)) { 1152 printf("setitimer: value: sec: %jd, usec: %ld\n", 1153 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1154 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1155 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1156 } 1157#endif 1158 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1159 if (error != 0 || uap->oitv == NULL) 1160 return (error); 1161 B2L_ITIMERVAL(&ls, &oitv); 1162 1163 return (copyout(&ls, uap->oitv, sizeof(ls))); 1164} 1165 1166int 1167linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1168{ 1169 int error; 1170 struct l_itimerval ls; 1171 struct itimerval aitv; 1172 1173#ifdef DEBUG 1174 if (ldebug(getitimer)) 1175 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1176#endif 1177 error = kern_getitimer(td, uap->which, &aitv); 1178 if (error != 0) 1179 return (error); 1180 B2L_ITIMERVAL(&ls, &aitv); 1181 return (copyout(&ls, uap->itv, sizeof(ls))); 1182} 1183 1184#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1185int 1186linux_nice(struct thread *td, struct linux_nice_args *args) 1187{ 1188 struct setpriority_args bsd_args; 1189 1190 bsd_args.which = PRIO_PROCESS; 1191 bsd_args.who = 0; /* current process */ 1192 bsd_args.prio = args->inc; 1193 return (sys_setpriority(td, &bsd_args)); 1194} 1195#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1196 1197int 1198linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1199{ 1200 struct ucred *newcred, *oldcred; 1201 l_gid_t *linux_gidset; 1202 gid_t *bsd_gidset; 1203 int ngrp, error; 1204 struct proc *p; 1205 1206 ngrp = args->gidsetsize; 1207 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1208 return (EINVAL); 1209 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1210 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1211 if (error) 1212 goto out; 1213 newcred = crget(); 1214 p = td->td_proc; 1215 PROC_LOCK(p); 1216 oldcred = crcopysafe(p, newcred); 1217 1218 /* 1219 * cr_groups[0] holds egid. Setting the whole set from 1220 * the supplied set will cause egid to be changed too. 1221 * Keep cr_groups[0] unchanged to prevent that. 1222 */ 1223 1224 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1225 PROC_UNLOCK(p); 1226 crfree(newcred); 1227 goto out; 1228 } 1229 1230 if (ngrp > 0) { 1231 newcred->cr_ngroups = ngrp + 1; 1232 1233 bsd_gidset = newcred->cr_groups; 1234 ngrp--; 1235 while (ngrp >= 0) { 1236 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1237 ngrp--; 1238 } 1239 } else 1240 newcred->cr_ngroups = 1; 1241 1242 setsugid(p); 1243 p->p_ucred = newcred; 1244 PROC_UNLOCK(p); 1245 crfree(oldcred); 1246 error = 0; 1247out: 1248 free(linux_gidset, M_LINUX); 1249 return (error); 1250} 1251 1252int 1253linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1254{ 1255 struct ucred *cred; 1256 l_gid_t *linux_gidset; 1257 gid_t *bsd_gidset; 1258 int bsd_gidsetsz, ngrp, error; 1259 1260 cred = td->td_ucred; 1261 bsd_gidset = cred->cr_groups; 1262 bsd_gidsetsz = cred->cr_ngroups - 1; 1263 1264 /* 1265 * cr_groups[0] holds egid. Returning the whole set 1266 * here will cause a duplicate. Exclude cr_groups[0] 1267 * to prevent that. 1268 */ 1269 1270 if ((ngrp = args->gidsetsize) == 0) { 1271 td->td_retval[0] = bsd_gidsetsz; 1272 return (0); 1273 } 1274 1275 if (ngrp < bsd_gidsetsz) 1276 return (EINVAL); 1277 1278 ngrp = 0; 1279 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1280 M_LINUX, M_WAITOK); 1281 while (ngrp < bsd_gidsetsz) { 1282 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1283 ngrp++; 1284 } 1285 1286 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1287 free(linux_gidset, M_LINUX); 1288 if (error) 1289 return (error); 1290 1291 td->td_retval[0] = ngrp; 1292 return (0); 1293} 1294 1295int 1296linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1297{ 1298 struct rlimit bsd_rlim; 1299 struct l_rlimit rlim; 1300 u_int which; 1301 int error; 1302 1303#ifdef DEBUG 1304 if (ldebug(setrlimit)) 1305 printf(ARGS(setrlimit, "%d, %p"), 1306 args->resource, (void *)args->rlim); 1307#endif 1308 1309 if (args->resource >= LINUX_RLIM_NLIMITS) 1310 return (EINVAL); 1311 1312 which = linux_to_bsd_resource[args->resource]; 1313 if (which == -1) 1314 return (EINVAL); 1315 1316 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1317 if (error) 1318 return (error); 1319 1320 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1321 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1322 return (kern_setrlimit(td, which, &bsd_rlim)); 1323} 1324 1325#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1326int 1327linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1328{ 1329 struct l_rlimit rlim; 1330 struct proc *p = td->td_proc; 1331 struct rlimit bsd_rlim; 1332 u_int which; 1333 1334#ifdef DEBUG 1335 if (ldebug(old_getrlimit)) 1336 printf(ARGS(old_getrlimit, "%d, %p"), 1337 args->resource, (void *)args->rlim); 1338#endif 1339 1340 if (args->resource >= LINUX_RLIM_NLIMITS) 1341 return (EINVAL); 1342 1343 which = linux_to_bsd_resource[args->resource]; 1344 if (which == -1) 1345 return (EINVAL); 1346 1347 PROC_LOCK(p); 1348 lim_rlimit(p, which, &bsd_rlim); 1349 PROC_UNLOCK(p); 1350 1351#ifdef COMPAT_LINUX32 1352 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1353 if (rlim.rlim_cur == UINT_MAX) 1354 rlim.rlim_cur = INT_MAX; 1355 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1356 if (rlim.rlim_max == UINT_MAX) 1357 rlim.rlim_max = INT_MAX; 1358#else 1359 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1360 if (rlim.rlim_cur == ULONG_MAX) 1361 rlim.rlim_cur = LONG_MAX; 1362 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1363 if (rlim.rlim_max == ULONG_MAX) 1364 rlim.rlim_max = LONG_MAX; 1365#endif 1366 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1367} 1368#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1369 1370int 1371linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1372{ 1373 struct l_rlimit rlim; 1374 struct proc *p = td->td_proc; 1375 struct rlimit bsd_rlim; 1376 u_int which; 1377 1378#ifdef DEBUG 1379 if (ldebug(getrlimit)) 1380 printf(ARGS(getrlimit, "%d, %p"), 1381 args->resource, (void *)args->rlim); 1382#endif 1383 1384 if (args->resource >= LINUX_RLIM_NLIMITS) 1385 return (EINVAL); 1386 1387 which = linux_to_bsd_resource[args->resource]; 1388 if (which == -1) 1389 return (EINVAL); 1390 1391 PROC_LOCK(p); 1392 lim_rlimit(p, which, &bsd_rlim); 1393 PROC_UNLOCK(p); 1394 1395 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1396 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1397 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1398} 1399 1400int 1401linux_sched_setscheduler(struct thread *td, 1402 struct linux_sched_setscheduler_args *args) 1403{ 1404 struct sched_param sched_param; 1405 struct thread *tdt; 1406 int error, policy; 1407 1408#ifdef DEBUG 1409 if (ldebug(sched_setscheduler)) 1410 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1411 args->pid, args->policy, (const void *)args->param); 1412#endif 1413 1414 switch (args->policy) { 1415 case LINUX_SCHED_OTHER: 1416 policy = SCHED_OTHER; 1417 break; 1418 case LINUX_SCHED_FIFO: 1419 policy = SCHED_FIFO; 1420 break; 1421 case LINUX_SCHED_RR: 1422 policy = SCHED_RR; 1423 break; 1424 default: 1425 return (EINVAL); 1426 } 1427 1428 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1429 if (error) 1430 return (error); 1431 1432 tdt = linux_tdfind(td, args->pid, -1); 1433 if (tdt == NULL) 1434 return (ESRCH); 1435 1436 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1437 PROC_UNLOCK(tdt->td_proc); 1438 return (error); 1439} 1440 1441int 1442linux_sched_getscheduler(struct thread *td, 1443 struct linux_sched_getscheduler_args *args) 1444{ 1445 struct thread *tdt; 1446 int error, policy; 1447 1448#ifdef DEBUG 1449 if (ldebug(sched_getscheduler)) 1450 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1451#endif 1452 1453 tdt = linux_tdfind(td, args->pid, -1); 1454 if (tdt == NULL) 1455 return (ESRCH); 1456 1457 error = kern_sched_getscheduler(td, tdt, &policy); 1458 PROC_UNLOCK(tdt->td_proc); 1459 1460 switch (policy) { 1461 case SCHED_OTHER: 1462 td->td_retval[0] = LINUX_SCHED_OTHER; 1463 break; 1464 case SCHED_FIFO: 1465 td->td_retval[0] = LINUX_SCHED_FIFO; 1466 break; 1467 case SCHED_RR: 1468 td->td_retval[0] = LINUX_SCHED_RR; 1469 break; 1470 } 1471 return (error); 1472} 1473 1474int 1475linux_sched_get_priority_max(struct thread *td, 1476 struct linux_sched_get_priority_max_args *args) 1477{ 1478 struct sched_get_priority_max_args bsd; 1479 1480#ifdef DEBUG 1481 if (ldebug(sched_get_priority_max)) 1482 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1483#endif 1484 1485 switch (args->policy) { 1486 case LINUX_SCHED_OTHER: 1487 bsd.policy = SCHED_OTHER; 1488 break; 1489 case LINUX_SCHED_FIFO: 1490 bsd.policy = SCHED_FIFO; 1491 break; 1492 case LINUX_SCHED_RR: 1493 bsd.policy = SCHED_RR; 1494 break; 1495 default: 1496 return (EINVAL); 1497 } 1498 return (sys_sched_get_priority_max(td, &bsd)); 1499} 1500 1501int 1502linux_sched_get_priority_min(struct thread *td, 1503 struct linux_sched_get_priority_min_args *args) 1504{ 1505 struct sched_get_priority_min_args bsd; 1506 1507#ifdef DEBUG 1508 if (ldebug(sched_get_priority_min)) 1509 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1510#endif 1511 1512 switch (args->policy) { 1513 case LINUX_SCHED_OTHER: 1514 bsd.policy = SCHED_OTHER; 1515 break; 1516 case LINUX_SCHED_FIFO: 1517 bsd.policy = SCHED_FIFO; 1518 break; 1519 case LINUX_SCHED_RR: 1520 bsd.policy = SCHED_RR; 1521 break; 1522 default: 1523 return (EINVAL); 1524 } 1525 return (sys_sched_get_priority_min(td, &bsd)); 1526} 1527 1528#define REBOOT_CAD_ON 0x89abcdef 1529#define REBOOT_CAD_OFF 0 1530#define REBOOT_HALT 0xcdef0123 1531#define REBOOT_RESTART 0x01234567 1532#define REBOOT_RESTART2 0xA1B2C3D4 1533#define REBOOT_POWEROFF 0x4321FEDC 1534#define REBOOT_MAGIC1 0xfee1dead 1535#define REBOOT_MAGIC2 0x28121969 1536#define REBOOT_MAGIC2A 0x05121996 1537#define REBOOT_MAGIC2B 0x16041998 1538 1539int 1540linux_reboot(struct thread *td, struct linux_reboot_args *args) 1541{ 1542 struct reboot_args bsd_args; 1543 1544#ifdef DEBUG 1545 if (ldebug(reboot)) 1546 printf(ARGS(reboot, "0x%x"), args->cmd); 1547#endif 1548 1549 if (args->magic1 != REBOOT_MAGIC1) 1550 return (EINVAL); 1551 1552 switch (args->magic2) { 1553 case REBOOT_MAGIC2: 1554 case REBOOT_MAGIC2A: 1555 case REBOOT_MAGIC2B: 1556 break; 1557 default: 1558 return (EINVAL); 1559 } 1560 1561 switch (args->cmd) { 1562 case REBOOT_CAD_ON: 1563 case REBOOT_CAD_OFF: 1564 return (priv_check(td, PRIV_REBOOT)); 1565 case REBOOT_HALT: 1566 bsd_args.opt = RB_HALT; 1567 break; 1568 case REBOOT_RESTART: 1569 case REBOOT_RESTART2: 1570 bsd_args.opt = 0; 1571 break; 1572 case REBOOT_POWEROFF: 1573 bsd_args.opt = RB_POWEROFF; 1574 break; 1575 default: 1576 return (EINVAL); 1577 } 1578 return (sys_reboot(td, &bsd_args)); 1579} 1580 1581 1582/* 1583 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1584 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1585 * are assumed to be preserved. The following lightweight syscalls fixes 1586 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1587 * 1588 * linux_getpid() - MP SAFE 1589 * linux_getgid() - MP SAFE 1590 * linux_getuid() - MP SAFE 1591 */ 1592 1593int 1594linux_getpid(struct thread *td, struct linux_getpid_args *args) 1595{ 1596 1597#ifdef DEBUG 1598 if (ldebug(getpid)) 1599 printf(ARGS(getpid, "")); 1600#endif 1601 td->td_retval[0] = td->td_proc->p_pid; 1602 1603 return (0); 1604} 1605 1606int 1607linux_gettid(struct thread *td, struct linux_gettid_args *args) 1608{ 1609 struct linux_emuldata *em; 1610 1611#ifdef DEBUG 1612 if (ldebug(gettid)) 1613 printf(ARGS(gettid, "")); 1614#endif 1615 1616 em = em_find(td); 1617 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1618 1619 td->td_retval[0] = em->em_tid; 1620 1621 return (0); 1622} 1623 1624 1625int 1626linux_getppid(struct thread *td, struct linux_getppid_args *args) 1627{ 1628 1629#ifdef DEBUG 1630 if (ldebug(getppid)) 1631 printf(ARGS(getppid, "")); 1632#endif 1633 1634 PROC_LOCK(td->td_proc); 1635 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1636 PROC_UNLOCK(td->td_proc); 1637 return (0); 1638} 1639 1640int 1641linux_getgid(struct thread *td, struct linux_getgid_args *args) 1642{ 1643 1644#ifdef DEBUG 1645 if (ldebug(getgid)) 1646 printf(ARGS(getgid, "")); 1647#endif 1648 1649 td->td_retval[0] = td->td_ucred->cr_rgid; 1650 return (0); 1651} 1652 1653int 1654linux_getuid(struct thread *td, struct linux_getuid_args *args) 1655{ 1656 1657#ifdef DEBUG 1658 if (ldebug(getuid)) 1659 printf(ARGS(getuid, "")); 1660#endif 1661 1662 td->td_retval[0] = td->td_ucred->cr_ruid; 1663 return (0); 1664} 1665 1666 1667int 1668linux_getsid(struct thread *td, struct linux_getsid_args *args) 1669{ 1670 struct getsid_args bsd; 1671 1672#ifdef DEBUG 1673 if (ldebug(getsid)) 1674 printf(ARGS(getsid, "%i"), args->pid); 1675#endif 1676 1677 bsd.pid = args->pid; 1678 return (sys_getsid(td, &bsd)); 1679} 1680 1681int 1682linux_nosys(struct thread *td, struct nosys_args *ignore) 1683{ 1684 1685 return (ENOSYS); 1686} 1687 1688int 1689linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1690{ 1691 struct getpriority_args bsd_args; 1692 int error; 1693 1694#ifdef DEBUG 1695 if (ldebug(getpriority)) 1696 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1697#endif 1698 1699 bsd_args.which = args->which; 1700 bsd_args.who = args->who; 1701 error = sys_getpriority(td, &bsd_args); 1702 td->td_retval[0] = 20 - td->td_retval[0]; 1703 return (error); 1704} 1705 1706int 1707linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1708{ 1709 int name[2]; 1710 1711#ifdef DEBUG 1712 if (ldebug(sethostname)) 1713 printf(ARGS(sethostname, "*, %i"), args->len); 1714#endif 1715 1716 name[0] = CTL_KERN; 1717 name[1] = KERN_HOSTNAME; 1718 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1719 args->len, 0, 0)); 1720} 1721 1722int 1723linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1724{ 1725 int name[2]; 1726 1727#ifdef DEBUG 1728 if (ldebug(setdomainname)) 1729 printf(ARGS(setdomainname, "*, %i"), args->len); 1730#endif 1731 1732 name[0] = CTL_KERN; 1733 name[1] = KERN_NISDOMAINNAME; 1734 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1735 args->len, 0, 0)); 1736} 1737 1738int 1739linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1740{ 1741 1742#ifdef DEBUG 1743 if (ldebug(exit_group)) 1744 printf(ARGS(exit_group, "%i"), args->error_code); 1745#endif 1746 1747 LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid, 1748 args->error_code); 1749 1750 /* 1751 * XXX: we should send a signal to the parent if 1752 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1753 * as it doesnt occur often. 1754 */ 1755 exit1(td, W_EXITCODE(args->error_code, 0)); 1756 /* NOTREACHED */ 1757} 1758 1759#define _LINUX_CAPABILITY_VERSION 0x19980330 1760 1761struct l_user_cap_header { 1762 l_int version; 1763 l_int pid; 1764}; 1765 1766struct l_user_cap_data { 1767 l_int effective; 1768 l_int permitted; 1769 l_int inheritable; 1770}; 1771 1772int 1773linux_capget(struct thread *td, struct linux_capget_args *args) 1774{ 1775 struct l_user_cap_header luch; 1776 struct l_user_cap_data lucd; 1777 int error; 1778 1779 if (args->hdrp == NULL) 1780 return (EFAULT); 1781 1782 error = copyin(args->hdrp, &luch, sizeof(luch)); 1783 if (error != 0) 1784 return (error); 1785 1786 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1787 luch.version = _LINUX_CAPABILITY_VERSION; 1788 error = copyout(&luch, args->hdrp, sizeof(luch)); 1789 if (error) 1790 return (error); 1791 return (EINVAL); 1792 } 1793 1794 if (luch.pid) 1795 return (EPERM); 1796 1797 if (args->datap) { 1798 /* 1799 * The current implementation doesn't support setting 1800 * a capability (it's essentially a stub) so indicate 1801 * that no capabilities are currently set or available 1802 * to request. 1803 */ 1804 bzero (&lucd, sizeof(lucd)); 1805 error = copyout(&lucd, args->datap, sizeof(lucd)); 1806 } 1807 1808 return (error); 1809} 1810 1811int 1812linux_capset(struct thread *td, struct linux_capset_args *args) 1813{ 1814 struct l_user_cap_header luch; 1815 struct l_user_cap_data lucd; 1816 int error; 1817 1818 if (args->hdrp == NULL || args->datap == NULL) 1819 return (EFAULT); 1820 1821 error = copyin(args->hdrp, &luch, sizeof(luch)); 1822 if (error != 0) 1823 return (error); 1824 1825 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1826 luch.version = _LINUX_CAPABILITY_VERSION; 1827 error = copyout(&luch, args->hdrp, sizeof(luch)); 1828 if (error) 1829 return (error); 1830 return (EINVAL); 1831 } 1832 1833 if (luch.pid) 1834 return (EPERM); 1835 1836 error = copyin(args->datap, &lucd, sizeof(lucd)); 1837 if (error != 0) 1838 return (error); 1839 1840 /* We currently don't support setting any capabilities. */ 1841 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1842 linux_msg(td, 1843 "capset effective=0x%x, permitted=0x%x, " 1844 "inheritable=0x%x is not implemented", 1845 (int)lucd.effective, (int)lucd.permitted, 1846 (int)lucd.inheritable); 1847 return (EPERM); 1848 } 1849 1850 return (0); 1851} 1852 1853int 1854linux_prctl(struct thread *td, struct linux_prctl_args *args) 1855{ 1856 int error = 0, max_size; 1857 struct proc *p = td->td_proc; 1858 char comm[LINUX_MAX_COMM_LEN]; 1859 struct linux_emuldata *em; 1860 int pdeath_signal; 1861 1862#ifdef DEBUG 1863 if (ldebug(prctl)) 1864 printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option, 1865 (uintmax_t)args->arg2, (uintmax_t)args->arg3, 1866 (uintmax_t)args->arg4, (uintmax_t)args->arg5); 1867#endif 1868 1869 switch (args->option) { 1870 case LINUX_PR_SET_PDEATHSIG: 1871 if (!LINUX_SIG_VALID(args->arg2)) 1872 return (EINVAL); 1873 em = em_find(td); 1874 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1875 em->pdeath_signal = args->arg2; 1876 break; 1877 case LINUX_PR_GET_PDEATHSIG: 1878 em = em_find(td); 1879 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1880 pdeath_signal = em->pdeath_signal; 1881 error = copyout(&pdeath_signal, 1882 (void *)(register_t)args->arg2, 1883 sizeof(pdeath_signal)); 1884 break; 1885 case LINUX_PR_GET_KEEPCAPS: 1886 /* 1887 * Indicate that we always clear the effective and 1888 * permitted capability sets when the user id becomes 1889 * non-zero (actually the capability sets are simply 1890 * always zero in the current implementation). 1891 */ 1892 td->td_retval[0] = 0; 1893 break; 1894 case LINUX_PR_SET_KEEPCAPS: 1895 /* 1896 * Ignore requests to keep the effective and permitted 1897 * capability sets when the user id becomes non-zero. 1898 */ 1899 break; 1900 case LINUX_PR_SET_NAME: 1901 /* 1902 * To be on the safe side we need to make sure to not 1903 * overflow the size a linux program expects. We already 1904 * do this here in the copyin, so that we don't need to 1905 * check on copyout. 1906 */ 1907 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1908 error = copyinstr((void *)(register_t)args->arg2, comm, 1909 max_size, NULL); 1910 1911 /* Linux silently truncates the name if it is too long. */ 1912 if (error == ENAMETOOLONG) { 1913 /* 1914 * XXX: copyinstr() isn't documented to populate the 1915 * array completely, so do a copyin() to be on the 1916 * safe side. This should be changed in case 1917 * copyinstr() is changed to guarantee this. 1918 */ 1919 error = copyin((void *)(register_t)args->arg2, comm, 1920 max_size - 1); 1921 comm[max_size - 1] = '\0'; 1922 } 1923 if (error) 1924 return (error); 1925 1926 PROC_LOCK(p); 1927 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1928 PROC_UNLOCK(p); 1929 break; 1930 case LINUX_PR_GET_NAME: 1931 PROC_LOCK(p); 1932 strlcpy(comm, p->p_comm, sizeof(comm)); 1933 PROC_UNLOCK(p); 1934 error = copyout(comm, (void *)(register_t)args->arg2, 1935 strlen(comm) + 1); 1936 break; 1937 default: 1938 error = EINVAL; 1939 break; 1940 } 1941 1942 return (error); 1943} 1944 1945int 1946linux_sched_setparam(struct thread *td, 1947 struct linux_sched_setparam_args *uap) 1948{ 1949 struct sched_param sched_param; 1950 struct thread *tdt; 1951 int error; 1952 1953#ifdef DEBUG 1954 if (ldebug(sched_setparam)) 1955 printf(ARGS(sched_setparam, "%d, *"), uap->pid); 1956#endif 1957 1958 error = copyin(uap->param, &sched_param, sizeof(sched_param)); 1959 if (error) 1960 return (error); 1961 1962 tdt = linux_tdfind(td, uap->pid, -1); 1963 if (tdt == NULL) 1964 return (ESRCH); 1965 1966 error = kern_sched_setparam(td, tdt, &sched_param); 1967 PROC_UNLOCK(tdt->td_proc); 1968 return (error); 1969} 1970 1971int 1972linux_sched_getparam(struct thread *td, 1973 struct linux_sched_getparam_args *uap) 1974{ 1975 struct sched_param sched_param; 1976 struct thread *tdt; 1977 int error; 1978 1979#ifdef DEBUG 1980 if (ldebug(sched_getparam)) 1981 printf(ARGS(sched_getparam, "%d, *"), uap->pid); 1982#endif 1983 1984 tdt = linux_tdfind(td, uap->pid, -1); 1985 if (tdt == NULL) 1986 return (ESRCH); 1987 1988 error = kern_sched_getparam(td, tdt, &sched_param); 1989 PROC_UNLOCK(tdt->td_proc); 1990 if (error == 0) 1991 error = copyout(&sched_param, uap->param, 1992 sizeof(sched_param)); 1993 return (error); 1994} 1995 1996/* 1997 * Get affinity of a process. 1998 */ 1999int 2000linux_sched_getaffinity(struct thread *td, 2001 struct linux_sched_getaffinity_args *args) 2002{ 2003 int error; 2004 struct thread *tdt; 2005 struct cpuset_getaffinity_args cga; 2006 2007#ifdef DEBUG 2008 if (ldebug(sched_getaffinity)) 2009 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2010 args->len); 2011#endif 2012 if (args->len < sizeof(cpuset_t)) 2013 return (EINVAL); 2014 2015 tdt = linux_tdfind(td, args->pid, -1); 2016 if (tdt == NULL) 2017 return (ESRCH); 2018 2019 PROC_UNLOCK(tdt->td_proc); 2020 cga.level = CPU_LEVEL_WHICH; 2021 cga.which = CPU_WHICH_TID; 2022 cga.id = tdt->td_tid; 2023 cga.cpusetsize = sizeof(cpuset_t); 2024 cga.mask = (cpuset_t *) args->user_mask_ptr; 2025 2026 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 2027 td->td_retval[0] = sizeof(cpuset_t); 2028 2029 return (error); 2030} 2031 2032/* 2033 * Set affinity of a process. 2034 */ 2035int 2036linux_sched_setaffinity(struct thread *td, 2037 struct linux_sched_setaffinity_args *args) 2038{ 2039 struct cpuset_setaffinity_args csa; 2040 struct thread *tdt; 2041 2042#ifdef DEBUG 2043 if (ldebug(sched_setaffinity)) 2044 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2045 args->len); 2046#endif 2047 if (args->len < sizeof(cpuset_t)) 2048 return (EINVAL); 2049 2050 tdt = linux_tdfind(td, args->pid, -1); 2051 if (tdt == NULL) 2052 return (ESRCH); 2053 2054 PROC_UNLOCK(tdt->td_proc); 2055 csa.level = CPU_LEVEL_WHICH; 2056 csa.which = CPU_WHICH_TID; 2057 csa.id = tdt->td_tid; 2058 csa.cpusetsize = sizeof(cpuset_t); 2059 csa.mask = (cpuset_t *) args->user_mask_ptr; 2060 2061 return (sys_cpuset_setaffinity(td, &csa)); 2062} 2063 2064struct linux_rlimit64 { 2065 uint64_t rlim_cur; 2066 uint64_t rlim_max; 2067}; 2068 2069int 2070linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2071{ 2072 struct rlimit rlim, nrlim; 2073 struct linux_rlimit64 lrlim; 2074 struct proc *p; 2075 u_int which; 2076 int flags; 2077 int error; 2078 2079#ifdef DEBUG 2080 if (ldebug(prlimit64)) 2081 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2082 args->resource, (void *)args->new, (void *)args->old); 2083#endif 2084 2085 if (args->resource >= LINUX_RLIM_NLIMITS) 2086 return (EINVAL); 2087 2088 which = linux_to_bsd_resource[args->resource]; 2089 if (which == -1) 2090 return (EINVAL); 2091 2092 if (args->new != NULL) { 2093 /* 2094 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2095 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2096 * as INFINITY so we do not need a conversion even. 2097 */ 2098 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2099 if (error != 0) 2100 return (error); 2101 } 2102 2103 flags = PGET_HOLD | PGET_NOTWEXIT; 2104 if (args->new != NULL) 2105 flags |= PGET_CANDEBUG; 2106 else 2107 flags |= PGET_CANSEE; 2108 error = pget(args->pid, flags, &p); 2109 if (error != 0) 2110 return (error); 2111 2112 if (args->old != NULL) { 2113 PROC_LOCK(p); 2114 lim_rlimit(p, which, &rlim); 2115 PROC_UNLOCK(p); 2116 if (rlim.rlim_cur == RLIM_INFINITY) 2117 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2118 else 2119 lrlim.rlim_cur = rlim.rlim_cur; 2120 if (rlim.rlim_max == RLIM_INFINITY) 2121 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2122 else 2123 lrlim.rlim_max = rlim.rlim_max; 2124 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2125 if (error != 0) 2126 goto out; 2127 } 2128 2129 if (args->new != NULL) 2130 error = kern_proc_setrlimit(td, p, which, &nrlim); 2131 2132 out: 2133 PRELE(p); 2134 return (error); 2135} 2136 2137int 2138linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2139{ 2140 struct timeval utv, tv0, tv1, *tvp; 2141 struct l_pselect6arg lpse6; 2142 struct l_timespec lts; 2143 struct timespec uts; 2144 l_sigset_t l_ss; 2145 sigset_t *ssp; 2146 sigset_t ss; 2147 int error; 2148 2149 ssp = NULL; 2150 if (args->sig != NULL) { 2151 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2152 if (error != 0) 2153 return (error); 2154 if (lpse6.ss_len != sizeof(l_ss)) 2155 return (EINVAL); 2156 if (lpse6.ss != 0) { 2157 error = copyin(PTRIN(lpse6.ss), &l_ss, 2158 sizeof(l_ss)); 2159 if (error != 0) 2160 return (error); 2161 linux_to_bsd_sigset(&l_ss, &ss); 2162 ssp = &ss; 2163 } 2164 } 2165 2166 /* 2167 * Currently glibc changes nanosecond number to microsecond. 2168 * This mean losing precision but for now it is hardly seen. 2169 */ 2170 if (args->tsp != NULL) { 2171 error = copyin(args->tsp, <s, sizeof(lts)); 2172 if (error != 0) 2173 return (error); 2174 uts.tv_sec = lts.tv_sec; 2175 uts.tv_nsec = lts.tv_nsec; 2176 2177 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2178 if (itimerfix(&utv)) 2179 return (EINVAL); 2180 2181 microtime(&tv0); 2182 tvp = &utv; 2183 } else 2184 tvp = NULL; 2185 2186 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2187 args->exceptfds, tvp, ssp, sizeof(l_int) * 8); 2188 2189 if (error == 0 && args->tsp != NULL) { 2190 if (td->td_retval[0] != 0) { 2191 /* 2192 * Compute how much time was left of the timeout, 2193 * by subtracting the current time and the time 2194 * before we started the call, and subtracting 2195 * that result from the user-supplied value. 2196 */ 2197 2198 microtime(&tv1); 2199 timevalsub(&tv1, &tv0); 2200 timevalsub(&utv, &tv1); 2201 if (utv.tv_sec < 0) 2202 timevalclear(&utv); 2203 } else 2204 timevalclear(&utv); 2205 2206 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2207 lts.tv_sec = uts.tv_sec; 2208 lts.tv_nsec = uts.tv_nsec; 2209 error = copyout(<s, args->tsp, sizeof(lts)); 2210 } 2211 2212 return (error); 2213} 2214 2215#if defined(DEBUG) || defined(KTR) 2216/* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2217 2218u_char linux_debug_map[howmany(LINUX_SYS_MAXSYSCALL, sizeof(u_char))]; 2219 2220static int 2221linux_debug(int syscall, int toggle, int global) 2222{ 2223 2224 if (global) { 2225 char c = toggle ? 0 : 0xff; 2226 2227 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2228 return (0); 2229 } 2230 if (syscall < 0 || syscall >= LINUX_SYS_MAXSYSCALL) 2231 return (EINVAL); 2232 if (toggle) 2233 clrbit(linux_debug_map, syscall); 2234 else 2235 setbit(linux_debug_map, syscall); 2236 return (0); 2237} 2238 2239/* 2240 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2241 * 2242 * E.g.: sysctl linux.debug=21.0 2243 * 2244 * As a special case, syscall "all" will apply to all syscalls globally. 2245 */ 2246#define LINUX_MAX_DEBUGSTR 16 2247int 2248linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2249{ 2250 char value[LINUX_MAX_DEBUGSTR], *p; 2251 int error, sysc, toggle; 2252 int global = 0; 2253 2254 value[0] = '\0'; 2255 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2256 if (error || req->newptr == NULL) 2257 return (error); 2258 for (p = value; *p != '\0' && *p != '.'; p++); 2259 if (*p == '\0') 2260 return (EINVAL); 2261 *p++ = '\0'; 2262 sysc = strtol(value, NULL, 0); 2263 toggle = strtol(p, NULL, 0); 2264 if (strcmp(value, "all") == 0) 2265 global = 1; 2266 error = linux_debug(sysc, toggle, global); 2267 return (error); 2268} 2269 2270#endif /* DEBUG || KTR */ 2271 2272int 2273linux_sched_rr_get_interval(struct thread *td, 2274 struct linux_sched_rr_get_interval_args *uap) 2275{ 2276 struct timespec ts; 2277 struct l_timespec lts; 2278 struct thread *tdt; 2279 int error; 2280 2281 /* 2282 * According to man in case the invalid pid specified 2283 * EINVAL should be returned. 2284 */ 2285 if (uap->pid < 0) 2286 return (EINVAL); 2287 2288 tdt = linux_tdfind(td, uap->pid, -1); 2289 if (tdt == NULL) 2290 return (ESRCH); 2291 2292 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2293 PROC_UNLOCK(tdt->td_proc); 2294 if (error != 0) 2295 return (error); 2296 lts.tv_sec = ts.tv_sec; 2297 lts.tv_nsec = ts.tv_nsec; 2298 return (copyout(<s, uap->interval, sizeof(lts))); 2299} 2300 2301/* 2302 * In case when the Linux thread is the initial thread in 2303 * the thread group thread id is equal to the process id. 2304 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2305 */ 2306struct thread * 2307linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2308{ 2309 struct linux_emuldata *em; 2310 struct thread *tdt; 2311 struct proc *p; 2312 2313 tdt = NULL; 2314 if (tid == 0 || tid == td->td_tid) { 2315 tdt = td; 2316 PROC_LOCK(tdt->td_proc); 2317 } else if (tid > PID_MAX) 2318 tdt = tdfind(tid, pid); 2319 else { 2320 /* 2321 * Initial thread where the tid equal to the pid. 2322 */ 2323 p = pfind(tid); 2324 if (p != NULL) { 2325 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2326 /* 2327 * p is not a Linuxulator process. 2328 */ 2329 PROC_UNLOCK(p); 2330 return (NULL); 2331 } 2332 FOREACH_THREAD_IN_PROC(p, tdt) { 2333 em = em_find(tdt); 2334 if (tid == em->em_tid) 2335 return (tdt); 2336 } 2337 PROC_UNLOCK(p); 2338 } 2339 return (NULL); 2340 } 2341 2342 return (tdt); 2343} 2344 2345void 2346linux_to_bsd_waitopts(int options, int *bsdopts) 2347{ 2348 2349 if (options & LINUX_WNOHANG) 2350 *bsdopts |= WNOHANG; 2351 if (options & LINUX_WUNTRACED) 2352 *bsdopts |= WUNTRACED; 2353 if (options & LINUX_WEXITED) 2354 *bsdopts |= WEXITED; 2355 if (options & LINUX_WCONTINUED) 2356 *bsdopts |= WCONTINUED; 2357 if (options & LINUX_WNOWAIT) 2358 *bsdopts |= WNOWAIT; 2359 2360 if (options & __WCLONE) 2361 *bsdopts |= WLINUXCLONE; 2362} 2363