linux_misc.c revision 294368
133965Sjdp/*- 233965Sjdp * Copyright (c) 2002 Doug Rabson 333965Sjdp * Copyright (c) 1994-1995 S��ren Schmidt 433965Sjdp * All rights reserved. 533965Sjdp * 689857Sobrien * Redistribution and use in source and binary forms, with or without 733965Sjdp * modification, are permitted provided that the following conditions 889857Sobrien * are met: 989857Sobrien * 1. Redistributions of source code must retain the above copyright 1089857Sobrien * notice, this list of conditions and the following disclaimer 1189857Sobrien * in this position and unchanged. 1289857Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1333965Sjdp * notice, this list of conditions and the following disclaimer in the 1489857Sobrien * documentation and/or other materials provided with the distribution. 1533965Sjdp * 3. The name of the author may not be used to endorse or promote products 1633965Sjdp * derived from this software without specific prior written permission 1733965Sjdp * 1833965Sjdp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1933965Sjdp * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2033965Sjdp * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2133965Sjdp * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2233965Sjdp * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23218822Sdim * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24218822Sdim * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25218822Sdim * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26218822Sdim * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27218822Sdim * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28218822Sdim */ 2933965Sjdp 30218822Sdim#include <sys/cdefs.h> 3133965Sjdp__FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_misc.c 294368 2016-01-20 01:09:53Z jhb $"); 32218822Sdim 33218822Sdim#include "opt_compat.h" 3433965Sjdp#include "opt_kdtrace.h" 3533965Sjdp 3633965Sjdp#include <sys/param.h> 3733965Sjdp#include <sys/blist.h> 38218822Sdim#include <sys/fcntl.h> 3933965Sjdp#if defined(__i386__) 4033965Sjdp#include <sys/imgact_aout.h> 4133965Sjdp#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_timer.h> 93#include <compat/linux/linux_util.h> 94#include <compat/linux/linux_sysproto.h> 95#include <compat/linux/linux_emul.h> 96#include <compat/linux/linux_misc.h> 97 98/** 99 * Special DTrace provider for the linuxulator. 100 * 101 * In this file we define the provider for the entire linuxulator. All 102 * modules (= files of the linuxulator) use it. 103 * 104 * We define a different name depending on the emulated bitsize, see 105 * ../../<ARCH>/linux{,32}/linux.h, e.g.: 106 * native bitsize = linuxulator 107 * amd64, 32bit emulation = linuxulator32 108 */ 109LIN_SDT_PROVIDER_DEFINE(LINUX_DTRACE); 110 111int stclohz; /* Statistics clock frequency */ 112 113static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 114 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 115 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 116 RLIMIT_MEMLOCK, RLIMIT_AS 117}; 118 119struct l_sysinfo { 120 l_long uptime; /* Seconds since boot */ 121 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 122#define LINUX_SYSINFO_LOADS_SCALE 65536 123 l_ulong totalram; /* Total usable main memory size */ 124 l_ulong freeram; /* Available memory size */ 125 l_ulong sharedram; /* Amount of shared memory */ 126 l_ulong bufferram; /* Memory used by buffers */ 127 l_ulong totalswap; /* Total swap space size */ 128 l_ulong freeswap; /* swap space still available */ 129 l_ushort procs; /* Number of current processes */ 130 l_ushort pads; 131 l_ulong totalbig; 132 l_ulong freebig; 133 l_uint mem_unit; 134 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 135}; 136 137struct l_pselect6arg { 138 l_uintptr_t ss; 139 l_size_t ss_len; 140}; 141 142static int linux_utimensat_nsec_valid(l_long); 143 144 145int 146linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 147{ 148 struct l_sysinfo sysinfo; 149 vm_object_t object; 150 int i, j; 151 struct timespec ts; 152 153 getnanouptime(&ts); 154 if (ts.tv_nsec != 0) 155 ts.tv_sec++; 156 sysinfo.uptime = ts.tv_sec; 157 158 /* Use the information from the mib to get our load averages */ 159 for (i = 0; i < 3; i++) 160 sysinfo.loads[i] = averunnable.ldavg[i] * 161 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 162 163 sysinfo.totalram = physmem * PAGE_SIZE; 164 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 165 166 sysinfo.sharedram = 0; 167 mtx_lock(&vm_object_list_mtx); 168 TAILQ_FOREACH(object, &vm_object_list, object_list) 169 if (object->shadow_count > 1) 170 sysinfo.sharedram += object->resident_page_count; 171 mtx_unlock(&vm_object_list_mtx); 172 173 sysinfo.sharedram *= PAGE_SIZE; 174 sysinfo.bufferram = 0; 175 176 swap_pager_status(&i, &j); 177 sysinfo.totalswap = i * PAGE_SIZE; 178 sysinfo.freeswap = (i - j) * PAGE_SIZE; 179 180 sysinfo.procs = nprocs; 181 182 /* The following are only present in newer Linux kernels. */ 183 sysinfo.totalbig = 0; 184 sysinfo.freebig = 0; 185 sysinfo.mem_unit = 1; 186 187 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 188} 189 190int 191linux_alarm(struct thread *td, struct linux_alarm_args *args) 192{ 193 struct itimerval it, old_it; 194 u_int secs; 195 int error; 196 197#ifdef DEBUG 198 if (ldebug(alarm)) 199 printf(ARGS(alarm, "%u"), args->secs); 200#endif 201 202 secs = args->secs; 203 204 if (secs > INT_MAX) 205 secs = INT_MAX; 206 207 it.it_value.tv_sec = (long) secs; 208 it.it_value.tv_usec = 0; 209 it.it_interval.tv_sec = 0; 210 it.it_interval.tv_usec = 0; 211 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 212 if (error) 213 return (error); 214 if (timevalisset(&old_it.it_value)) { 215 if (old_it.it_value.tv_usec != 0) 216 old_it.it_value.tv_sec++; 217 td->td_retval[0] = old_it.it_value.tv_sec; 218 } 219 return (0); 220} 221 222int 223linux_brk(struct thread *td, struct linux_brk_args *args) 224{ 225 struct vmspace *vm = td->td_proc->p_vmspace; 226 vm_offset_t new, old; 227 struct obreak_args /* { 228 char * nsize; 229 } */ tmp; 230 231#ifdef DEBUG 232 if (ldebug(brk)) 233 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 234#endif 235 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 236 new = (vm_offset_t)args->dsend; 237 tmp.nsize = (char *)new; 238 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 239 td->td_retval[0] = (long)new; 240 else 241 td->td_retval[0] = (long)old; 242 243 return (0); 244} 245 246#if defined(__i386__) 247/* XXX: what about amd64/linux32? */ 248 249int 250linux_uselib(struct thread *td, struct linux_uselib_args *args) 251{ 252 struct nameidata ni; 253 struct vnode *vp; 254 struct exec *a_out; 255 struct vattr attr; 256 vm_offset_t vmaddr; 257 unsigned long file_offset; 258 unsigned long bss_size; 259 char *library; 260 ssize_t aresid; 261 int error, locked, writecount; 262 263 LCONVPATHEXIST(td, args->library, &library); 264 265#ifdef DEBUG 266 if (ldebug(uselib)) 267 printf(ARGS(uselib, "%s"), library); 268#endif 269 270 a_out = NULL; 271 locked = 0; 272 vp = NULL; 273 274 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1, 275 UIO_SYSSPACE, library, td); 276 error = namei(&ni); 277 LFREEPATH(library); 278 if (error) 279 goto cleanup; 280 281 vp = ni.ni_vp; 282 NDFREE(&ni, NDF_ONLY_PNBUF); 283 284 /* 285 * From here on down, we have a locked vnode that must be unlocked. 286 * XXX: The code below largely duplicates exec_check_permissions(). 287 */ 288 locked = 1; 289 290 /* Writable? */ 291 error = VOP_GET_WRITECOUNT(vp, &writecount); 292 if (error != 0) 293 goto cleanup; 294 if (writecount != 0) { 295 error = ETXTBSY; 296 goto cleanup; 297 } 298 299 /* Executable? */ 300 error = VOP_GETATTR(vp, &attr, td->td_ucred); 301 if (error) 302 goto cleanup; 303 304 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 305 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 306 /* EACCESS is what exec(2) returns. */ 307 error = ENOEXEC; 308 goto cleanup; 309 } 310 311 /* Sensible size? */ 312 if (attr.va_size == 0) { 313 error = ENOEXEC; 314 goto cleanup; 315 } 316 317 /* Can we access it? */ 318 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 319 if (error) 320 goto cleanup; 321 322 /* 323 * XXX: This should use vn_open() so that it is properly authorized, 324 * and to reduce code redundancy all over the place here. 325 * XXX: Not really, it duplicates far more of exec_check_permissions() 326 * than vn_open(). 327 */ 328#ifdef MAC 329 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 330 if (error) 331 goto cleanup; 332#endif 333 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 334 if (error) 335 goto cleanup; 336 337 /* Pull in executable header into exec_map */ 338 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 339 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 340 if (error) 341 goto cleanup; 342 343 /* Is it a Linux binary ? */ 344 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 345 error = ENOEXEC; 346 goto cleanup; 347 } 348 349 /* 350 * While we are here, we should REALLY do some more checks 351 */ 352 353 /* Set file/virtual offset based on a.out variant. */ 354 switch ((int)(a_out->a_magic & 0xffff)) { 355 case 0413: /* ZMAGIC */ 356 file_offset = 1024; 357 break; 358 case 0314: /* QMAGIC */ 359 file_offset = 0; 360 break; 361 default: 362 error = ENOEXEC; 363 goto cleanup; 364 } 365 366 bss_size = round_page(a_out->a_bss); 367 368 /* Check various fields in header for validity/bounds. */ 369 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 370 error = ENOEXEC; 371 goto cleanup; 372 } 373 374 /* text + data can't exceed file size */ 375 if (a_out->a_data + a_out->a_text > attr.va_size) { 376 error = EFAULT; 377 goto cleanup; 378 } 379 380 /* 381 * text/data/bss must not exceed limits 382 * XXX - this is not complete. it should check current usage PLUS 383 * the resources needed by this library. 384 */ 385 PROC_LOCK(td->td_proc); 386 if (a_out->a_text > maxtsiz || 387 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) || 388 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 389 bss_size) != 0) { 390 PROC_UNLOCK(td->td_proc); 391 error = ENOMEM; 392 goto cleanup; 393 } 394 PROC_UNLOCK(td->td_proc); 395 396 /* 397 * Prevent more writers. 398 * XXX: Note that if any of the VM operations fail below we don't 399 * clear this flag. 400 */ 401 VOP_SET_TEXT(vp); 402 403 /* 404 * Lock no longer needed 405 */ 406 locked = 0; 407 VOP_UNLOCK(vp, 0); 408 409 /* 410 * Check if file_offset page aligned. Currently we cannot handle 411 * misalinged file offsets, and so we read in the entire image 412 * (what a waste). 413 */ 414 if (file_offset & PAGE_MASK) { 415#ifdef DEBUG 416 printf("uselib: Non page aligned binary %lu\n", file_offset); 417#endif 418 /* Map text+data read/write/execute */ 419 420 /* a_entry is the load address and is page aligned */ 421 vmaddr = trunc_page(a_out->a_entry); 422 423 /* get anon user mapping, read+write+execute */ 424 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 425 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE, 426 VM_PROT_ALL, VM_PROT_ALL, 0); 427 if (error) 428 goto cleanup; 429 430 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 431 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 432 td->td_ucred, NOCRED, &aresid, td); 433 if (error != 0) 434 goto cleanup; 435 if (aresid != 0) { 436 error = ENOEXEC; 437 goto cleanup; 438 } 439 } else { 440#ifdef DEBUG 441 printf("uselib: Page aligned binary %lu\n", file_offset); 442#endif 443 /* 444 * for QMAGIC, a_entry is 20 bytes beyond the load address 445 * to skip the executable header 446 */ 447 vmaddr = trunc_page(a_out->a_entry); 448 449 /* 450 * Map it all into the process's space as a single 451 * copy-on-write "data" segment. 452 */ 453 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 454 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 455 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 456 if (error) 457 goto cleanup; 458 } 459#ifdef DEBUG 460 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 461 ((long *)vmaddr)[1]); 462#endif 463 if (bss_size != 0) { 464 /* Calculate BSS start address */ 465 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 466 a_out->a_data; 467 468 /* allocate some 'anon' space */ 469 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 470 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, 471 VM_PROT_ALL, 0); 472 if (error) 473 goto cleanup; 474 } 475 476cleanup: 477 /* Unlock vnode if needed */ 478 if (locked) 479 VOP_UNLOCK(vp, 0); 480 481 /* Release the temporary mapping. */ 482 if (a_out) 483 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 484 485 return (error); 486} 487 488#endif /* __i386__ */ 489 490int 491linux_select(struct thread *td, struct linux_select_args *args) 492{ 493 l_timeval ltv; 494 struct timeval tv0, tv1, utv, *tvp; 495 int error; 496 497#ifdef DEBUG 498 if (ldebug(select)) 499 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 500 (void *)args->readfds, (void *)args->writefds, 501 (void *)args->exceptfds, (void *)args->timeout); 502#endif 503 504 /* 505 * Store current time for computation of the amount of 506 * time left. 507 */ 508 if (args->timeout) { 509 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 510 goto select_out; 511 utv.tv_sec = ltv.tv_sec; 512 utv.tv_usec = ltv.tv_usec; 513#ifdef DEBUG 514 if (ldebug(select)) 515 printf(LMSG("incoming timeout (%jd/%ld)"), 516 (intmax_t)utv.tv_sec, utv.tv_usec); 517#endif 518 519 if (itimerfix(&utv)) { 520 /* 521 * The timeval was invalid. Convert it to something 522 * valid that will act as it does under Linux. 523 */ 524 utv.tv_sec += utv.tv_usec / 1000000; 525 utv.tv_usec %= 1000000; 526 if (utv.tv_usec < 0) { 527 utv.tv_sec -= 1; 528 utv.tv_usec += 1000000; 529 } 530 if (utv.tv_sec < 0) 531 timevalclear(&utv); 532 } 533 microtime(&tv0); 534 tvp = &utv; 535 } else 536 tvp = NULL; 537 538 error = kern_select(td, args->nfds, args->readfds, args->writefds, 539 args->exceptfds, tvp, LINUX_NFDBITS); 540 541#ifdef DEBUG 542 if (ldebug(select)) 543 printf(LMSG("real select returns %d"), error); 544#endif 545 if (error) 546 goto select_out; 547 548 if (args->timeout) { 549 if (td->td_retval[0]) { 550 /* 551 * Compute how much time was left of the timeout, 552 * by subtracting the current time and the time 553 * before we started the call, and subtracting 554 * that result from the user-supplied value. 555 */ 556 microtime(&tv1); 557 timevalsub(&tv1, &tv0); 558 timevalsub(&utv, &tv1); 559 if (utv.tv_sec < 0) 560 timevalclear(&utv); 561 } else 562 timevalclear(&utv); 563#ifdef DEBUG 564 if (ldebug(select)) 565 printf(LMSG("outgoing timeout (%jd/%ld)"), 566 (intmax_t)utv.tv_sec, utv.tv_usec); 567#endif 568 ltv.tv_sec = utv.tv_sec; 569 ltv.tv_usec = utv.tv_usec; 570 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 571 goto select_out; 572 } 573 574select_out: 575#ifdef DEBUG 576 if (ldebug(select)) 577 printf(LMSG("select_out -> %d"), error); 578#endif 579 return (error); 580} 581 582int 583linux_mremap(struct thread *td, struct linux_mremap_args *args) 584{ 585 struct munmap_args /* { 586 void *addr; 587 size_t len; 588 } */ bsd_args; 589 int error = 0; 590 591#ifdef DEBUG 592 if (ldebug(mremap)) 593 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 594 (void *)(uintptr_t)args->addr, 595 (unsigned long)args->old_len, 596 (unsigned long)args->new_len, 597 (unsigned long)args->flags); 598#endif 599 600 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 601 td->td_retval[0] = 0; 602 return (EINVAL); 603 } 604 605 /* 606 * Check for the page alignment. 607 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 608 */ 609 if (args->addr & PAGE_MASK) { 610 td->td_retval[0] = 0; 611 return (EINVAL); 612 } 613 614 args->new_len = round_page(args->new_len); 615 args->old_len = round_page(args->old_len); 616 617 if (args->new_len > args->old_len) { 618 td->td_retval[0] = 0; 619 return (ENOMEM); 620 } 621 622 if (args->new_len < args->old_len) { 623 bsd_args.addr = 624 (caddr_t)((uintptr_t)args->addr + args->new_len); 625 bsd_args.len = args->old_len - args->new_len; 626 error = sys_munmap(td, &bsd_args); 627 } 628 629 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 630 return (error); 631} 632 633#define LINUX_MS_ASYNC 0x0001 634#define LINUX_MS_INVALIDATE 0x0002 635#define LINUX_MS_SYNC 0x0004 636 637int 638linux_msync(struct thread *td, struct linux_msync_args *args) 639{ 640 struct msync_args bsd_args; 641 642 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 643 bsd_args.len = (uintptr_t)args->len; 644 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 645 646 return (sys_msync(td, &bsd_args)); 647} 648 649int 650linux_time(struct thread *td, struct linux_time_args *args) 651{ 652 struct timeval tv; 653 l_time_t tm; 654 int error; 655 656#ifdef DEBUG 657 if (ldebug(time)) 658 printf(ARGS(time, "*")); 659#endif 660 661 microtime(&tv); 662 tm = tv.tv_sec; 663 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 664 return (error); 665 td->td_retval[0] = tm; 666 return (0); 667} 668 669struct l_times_argv { 670 l_clock_t tms_utime; 671 l_clock_t tms_stime; 672 l_clock_t tms_cutime; 673 l_clock_t tms_cstime; 674}; 675 676 677/* 678 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 679 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 680 * auxiliary vector entry. 681 */ 682#define CLK_TCK 100 683 684#define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 685#define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 686 687#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 688 CONVNTCK(r) : CONVOTCK(r)) 689 690int 691linux_times(struct thread *td, struct linux_times_args *args) 692{ 693 struct timeval tv, utime, stime, cutime, cstime; 694 struct l_times_argv tms; 695 struct proc *p; 696 int error; 697 698#ifdef DEBUG 699 if (ldebug(times)) 700 printf(ARGS(times, "*")); 701#endif 702 703 if (args->buf != NULL) { 704 p = td->td_proc; 705 PROC_LOCK(p); 706 PROC_STATLOCK(p); 707 calcru(p, &utime, &stime); 708 PROC_STATUNLOCK(p); 709 calccru(p, &cutime, &cstime); 710 PROC_UNLOCK(p); 711 712 tms.tms_utime = CONVTCK(utime); 713 tms.tms_stime = CONVTCK(stime); 714 715 tms.tms_cutime = CONVTCK(cutime); 716 tms.tms_cstime = CONVTCK(cstime); 717 718 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 719 return (error); 720 } 721 722 microuptime(&tv); 723 td->td_retval[0] = (int)CONVTCK(tv); 724 return (0); 725} 726 727int 728linux_newuname(struct thread *td, struct linux_newuname_args *args) 729{ 730 struct l_new_utsname utsname; 731 char osname[LINUX_MAX_UTSNAME]; 732 char osrelease[LINUX_MAX_UTSNAME]; 733 char *p; 734 735#ifdef DEBUG 736 if (ldebug(newuname)) 737 printf(ARGS(newuname, "*")); 738#endif 739 740 linux_get_osname(td, osname); 741 linux_get_osrelease(td, osrelease); 742 743 bzero(&utsname, sizeof(utsname)); 744 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 745 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 746 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 747 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 748 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 749 for (p = utsname.version; *p != '\0'; ++p) 750 if (*p == '\n') { 751 *p = '\0'; 752 break; 753 } 754 strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME); 755 756 return (copyout(&utsname, args->buf, sizeof(utsname))); 757} 758 759struct l_utimbuf { 760 l_time_t l_actime; 761 l_time_t l_modtime; 762}; 763 764int 765linux_utime(struct thread *td, struct linux_utime_args *args) 766{ 767 struct timeval tv[2], *tvp; 768 struct l_utimbuf lut; 769 char *fname; 770 int error; 771 772 LCONVPATHEXIST(td, args->fname, &fname); 773 774#ifdef DEBUG 775 if (ldebug(utime)) 776 printf(ARGS(utime, "%s, *"), fname); 777#endif 778 779 if (args->times) { 780 if ((error = copyin(args->times, &lut, sizeof lut))) { 781 LFREEPATH(fname); 782 return (error); 783 } 784 tv[0].tv_sec = lut.l_actime; 785 tv[0].tv_usec = 0; 786 tv[1].tv_sec = lut.l_modtime; 787 tv[1].tv_usec = 0; 788 tvp = tv; 789 } else 790 tvp = NULL; 791 792 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 793 LFREEPATH(fname); 794 return (error); 795} 796 797int 798linux_utimes(struct thread *td, struct linux_utimes_args *args) 799{ 800 l_timeval ltv[2]; 801 struct timeval tv[2], *tvp = NULL; 802 char *fname; 803 int error; 804 805 LCONVPATHEXIST(td, args->fname, &fname); 806 807#ifdef DEBUG 808 if (ldebug(utimes)) 809 printf(ARGS(utimes, "%s, *"), fname); 810#endif 811 812 if (args->tptr != NULL) { 813 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 814 LFREEPATH(fname); 815 return (error); 816 } 817 tv[0].tv_sec = ltv[0].tv_sec; 818 tv[0].tv_usec = ltv[0].tv_usec; 819 tv[1].tv_sec = ltv[1].tv_sec; 820 tv[1].tv_usec = ltv[1].tv_usec; 821 tvp = tv; 822 } 823 824 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 825 LFREEPATH(fname); 826 return (error); 827} 828 829static int 830linux_utimensat_nsec_valid(l_long nsec) 831{ 832 833 if (nsec == LINUX_UTIME_OMIT || nsec == LINUX_UTIME_NOW) 834 return (0); 835 if (nsec >= 0 && nsec <= 999999999) 836 return (0); 837 return (1); 838} 839 840int 841linux_utimensat(struct thread *td, struct linux_utimensat_args *args) 842{ 843 struct l_timespec l_times[2]; 844 struct timespec times[2], *timesp = NULL; 845 char *path = NULL; 846 int error, dfd, flags = 0; 847 848 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 849 850#ifdef DEBUG 851 if (ldebug(utimensat)) 852 printf(ARGS(utimensat, "%d, *"), dfd); 853#endif 854 855 if (args->flags & ~LINUX_AT_SYMLINK_NOFOLLOW) 856 return (EINVAL); 857 858 if (args->times != NULL) { 859 error = copyin(args->times, l_times, sizeof(l_times)); 860 if (error != 0) 861 return (error); 862 863 if (linux_utimensat_nsec_valid(l_times[0].tv_nsec) != 0 || 864 linux_utimensat_nsec_valid(l_times[1].tv_nsec) != 0) 865 return (EINVAL); 866 867 times[0].tv_sec = l_times[0].tv_sec; 868 switch (l_times[0].tv_nsec) 869 { 870 case LINUX_UTIME_OMIT: 871 times[0].tv_nsec = UTIME_OMIT; 872 break; 873 case LINUX_UTIME_NOW: 874 times[0].tv_nsec = UTIME_NOW; 875 break; 876 default: 877 times[0].tv_nsec = l_times[0].tv_nsec; 878 } 879 880 times[1].tv_sec = l_times[1].tv_sec; 881 switch (l_times[1].tv_nsec) 882 { 883 case LINUX_UTIME_OMIT: 884 times[1].tv_nsec = UTIME_OMIT; 885 break; 886 case LINUX_UTIME_NOW: 887 times[1].tv_nsec = UTIME_NOW; 888 break; 889 default: 890 times[1].tv_nsec = l_times[1].tv_nsec; 891 break; 892 } 893 timesp = times; 894 } 895 896 if (times[0].tv_nsec == UTIME_OMIT && times[1].tv_nsec == UTIME_OMIT) 897 /* This breaks POSIX, but is what the Linux kernel does 898 * _on purpose_ (documented in the man page for utimensat(2)), 899 * so we must follow that behaviour. */ 900 return (0); 901 902 if (args->pathname != NULL) 903 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 904 else if (args->flags != 0) 905 return (EINVAL); 906 907 if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) 908 flags |= AT_SYMLINK_NOFOLLOW; 909 910 if (path == NULL) 911 error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE); 912 else { 913 error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp, 914 UIO_SYSSPACE, flags); 915 LFREEPATH(path); 916 } 917 918 return (error); 919} 920 921int 922linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 923{ 924 l_timeval ltv[2]; 925 struct timeval tv[2], *tvp = NULL; 926 char *fname; 927 int error, dfd; 928 929 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 930 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 931 932#ifdef DEBUG 933 if (ldebug(futimesat)) 934 printf(ARGS(futimesat, "%s, *"), fname); 935#endif 936 937 if (args->utimes != NULL) { 938 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 939 LFREEPATH(fname); 940 return (error); 941 } 942 tv[0].tv_sec = ltv[0].tv_sec; 943 tv[0].tv_usec = ltv[0].tv_usec; 944 tv[1].tv_sec = ltv[1].tv_sec; 945 tv[1].tv_usec = ltv[1].tv_usec; 946 tvp = tv; 947 } 948 949 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 950 LFREEPATH(fname); 951 return (error); 952} 953 954int 955linux_common_wait(struct thread *td, int pid, int *status, 956 int options, struct rusage *ru) 957{ 958 int error, tmpstat; 959 960 error = kern_wait(td, pid, &tmpstat, options, ru); 961 if (error) 962 return (error); 963 964 if (status) { 965 tmpstat &= 0xffff; 966 if (WIFSIGNALED(tmpstat)) 967 tmpstat = (tmpstat & 0xffffff80) | 968 bsd_to_linux_signal(WTERMSIG(tmpstat)); 969 else if (WIFSTOPPED(tmpstat)) 970 tmpstat = (tmpstat & 0xffff00ff) | 971 (bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8); 972 else if (WIFCONTINUED(tmpstat)) 973 tmpstat = 0xffff; 974 error = copyout(&tmpstat, status, sizeof(int)); 975 } 976 977 return (error); 978} 979 980#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 981int 982linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 983{ 984 struct linux_wait4_args wait4_args; 985 986#ifdef DEBUG 987 if (ldebug(waitpid)) 988 printf(ARGS(waitpid, "%d, %p, %d"), 989 args->pid, (void *)args->status, args->options); 990#endif 991 992 wait4_args.pid = args->pid; 993 wait4_args.status = args->status; 994 wait4_args.options = args->options; 995 wait4_args.rusage = NULL; 996 997 return (linux_wait4(td, &wait4_args)); 998} 999#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1000 1001int 1002linux_wait4(struct thread *td, struct linux_wait4_args *args) 1003{ 1004 int error, options; 1005 struct rusage ru, *rup; 1006 1007#ifdef DEBUG 1008 if (ldebug(wait4)) 1009 printf(ARGS(wait4, "%d, %p, %d, %p"), 1010 args->pid, (void *)args->status, args->options, 1011 (void *)args->rusage); 1012#endif 1013 if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG | 1014 LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL)) 1015 return (EINVAL); 1016 1017 options = WEXITED; 1018 linux_to_bsd_waitopts(args->options, &options); 1019 1020 if (args->rusage != NULL) 1021 rup = &ru; 1022 else 1023 rup = NULL; 1024 error = linux_common_wait(td, args->pid, args->status, options, rup); 1025 if (error != 0) 1026 return (error); 1027 if (args->rusage != NULL) 1028 error = linux_copyout_rusage(&ru, args->rusage); 1029 return (error); 1030} 1031 1032int 1033linux_waitid(struct thread *td, struct linux_waitid_args *args) 1034{ 1035 int status, options, sig; 1036 struct __wrusage wru; 1037 siginfo_t siginfo; 1038 l_siginfo_t lsi; 1039 idtype_t idtype; 1040 struct proc *p; 1041 int error; 1042 1043 options = 0; 1044 linux_to_bsd_waitopts(args->options, &options); 1045 1046 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 1047 return (EINVAL); 1048 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 1049 return (EINVAL); 1050 1051 switch (args->idtype) { 1052 case LINUX_P_ALL: 1053 idtype = P_ALL; 1054 break; 1055 case LINUX_P_PID: 1056 if (args->id <= 0) 1057 return (EINVAL); 1058 idtype = P_PID; 1059 break; 1060 case LINUX_P_PGID: 1061 if (args->id <= 0) 1062 return (EINVAL); 1063 idtype = P_PGID; 1064 break; 1065 default: 1066 return (EINVAL); 1067 } 1068 1069 error = kern_wait6(td, idtype, args->id, &status, options, 1070 &wru, &siginfo); 1071 if (error != 0) 1072 return (error); 1073 if (args->rusage != NULL) { 1074 error = linux_copyout_rusage(&wru.wru_children, 1075 args->rusage); 1076 if (error != 0) 1077 return (error); 1078 } 1079 if (args->info != NULL) { 1080 p = td->td_proc; 1081 if (td->td_retval[0] == 0) 1082 bzero(&lsi, sizeof(lsi)); 1083 else { 1084 sig = bsd_to_linux_signal(siginfo.si_signo); 1085 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 1086 } 1087 error = copyout(&lsi, args->info, sizeof(lsi)); 1088 } 1089 td->td_retval[0] = 0; 1090 1091 return (error); 1092} 1093 1094int 1095linux_mknod(struct thread *td, struct linux_mknod_args *args) 1096{ 1097 char *path; 1098 int error; 1099 1100 LCONVPATHCREAT(td, args->path, &path); 1101 1102#ifdef DEBUG 1103 if (ldebug(mknod)) 1104 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1105 (uintmax_t)args->dev); 1106#endif 1107 1108 switch (args->mode & S_IFMT) { 1109 case S_IFIFO: 1110 case S_IFSOCK: 1111 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 1112 break; 1113 1114 case S_IFCHR: 1115 case S_IFBLK: 1116 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 1117 args->dev); 1118 break; 1119 1120 case S_IFDIR: 1121 error = EPERM; 1122 break; 1123 1124 case 0: 1125 args->mode |= S_IFREG; 1126 /* FALLTHROUGH */ 1127 case S_IFREG: 1128 error = kern_open(td, path, UIO_SYSSPACE, 1129 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1130 if (error == 0) 1131 kern_close(td, td->td_retval[0]); 1132 break; 1133 1134 default: 1135 error = EINVAL; 1136 break; 1137 } 1138 LFREEPATH(path); 1139 return (error); 1140} 1141 1142int 1143linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1144{ 1145 char *path; 1146 int error, dfd; 1147 1148 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1149 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1150 1151#ifdef DEBUG 1152 if (ldebug(mknodat)) 1153 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1154#endif 1155 1156 switch (args->mode & S_IFMT) { 1157 case S_IFIFO: 1158 case S_IFSOCK: 1159 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1160 break; 1161 1162 case S_IFCHR: 1163 case S_IFBLK: 1164 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1165 args->dev); 1166 break; 1167 1168 case S_IFDIR: 1169 error = EPERM; 1170 break; 1171 1172 case 0: 1173 args->mode |= S_IFREG; 1174 /* FALLTHROUGH */ 1175 case S_IFREG: 1176 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1177 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1178 if (error == 0) 1179 kern_close(td, td->td_retval[0]); 1180 break; 1181 1182 default: 1183 error = EINVAL; 1184 break; 1185 } 1186 LFREEPATH(path); 1187 return (error); 1188} 1189 1190/* 1191 * UGH! This is just about the dumbest idea I've ever heard!! 1192 */ 1193int 1194linux_personality(struct thread *td, struct linux_personality_args *args) 1195{ 1196#ifdef DEBUG 1197 if (ldebug(personality)) 1198 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1199#endif 1200 if (args->per != 0) 1201 return (EINVAL); 1202 1203 /* Yes Jim, it's still a Linux... */ 1204 td->td_retval[0] = 0; 1205 return (0); 1206} 1207 1208struct l_itimerval { 1209 l_timeval it_interval; 1210 l_timeval it_value; 1211}; 1212 1213#define B2L_ITIMERVAL(bip, lip) \ 1214 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1215 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1216 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1217 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1218 1219int 1220linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1221{ 1222 int error; 1223 struct l_itimerval ls; 1224 struct itimerval aitv, oitv; 1225 1226#ifdef DEBUG 1227 if (ldebug(setitimer)) 1228 printf(ARGS(setitimer, "%p, %p"), 1229 (void *)uap->itv, (void *)uap->oitv); 1230#endif 1231 1232 if (uap->itv == NULL) { 1233 uap->itv = uap->oitv; 1234 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1235 } 1236 1237 error = copyin(uap->itv, &ls, sizeof(ls)); 1238 if (error != 0) 1239 return (error); 1240 B2L_ITIMERVAL(&aitv, &ls); 1241#ifdef DEBUG 1242 if (ldebug(setitimer)) { 1243 printf("setitimer: value: sec: %jd, usec: %ld\n", 1244 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1245 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1246 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1247 } 1248#endif 1249 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1250 if (error != 0 || uap->oitv == NULL) 1251 return (error); 1252 B2L_ITIMERVAL(&ls, &oitv); 1253 1254 return (copyout(&ls, uap->oitv, sizeof(ls))); 1255} 1256 1257int 1258linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1259{ 1260 int error; 1261 struct l_itimerval ls; 1262 struct itimerval aitv; 1263 1264#ifdef DEBUG 1265 if (ldebug(getitimer)) 1266 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1267#endif 1268 error = kern_getitimer(td, uap->which, &aitv); 1269 if (error != 0) 1270 return (error); 1271 B2L_ITIMERVAL(&ls, &aitv); 1272 return (copyout(&ls, uap->itv, sizeof(ls))); 1273} 1274 1275#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1276int 1277linux_nice(struct thread *td, struct linux_nice_args *args) 1278{ 1279 struct setpriority_args bsd_args; 1280 1281 bsd_args.which = PRIO_PROCESS; 1282 bsd_args.who = 0; /* current process */ 1283 bsd_args.prio = args->inc; 1284 return (sys_setpriority(td, &bsd_args)); 1285} 1286#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1287 1288int 1289linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1290{ 1291 struct ucred *newcred, *oldcred; 1292 l_gid_t *linux_gidset; 1293 gid_t *bsd_gidset; 1294 int ngrp, error; 1295 struct proc *p; 1296 1297 ngrp = args->gidsetsize; 1298 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1299 return (EINVAL); 1300 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1301 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1302 if (error) 1303 goto out; 1304 newcred = crget(); 1305 crextend(newcred, ngrp + 1); 1306 p = td->td_proc; 1307 PROC_LOCK(p); 1308 oldcred = p->p_ucred; 1309 crcopy(newcred, oldcred); 1310 1311 /* 1312 * cr_groups[0] holds egid. Setting the whole set from 1313 * the supplied set will cause egid to be changed too. 1314 * Keep cr_groups[0] unchanged to prevent that. 1315 */ 1316 1317 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1318 PROC_UNLOCK(p); 1319 crfree(newcred); 1320 goto out; 1321 } 1322 1323 if (ngrp > 0) { 1324 newcred->cr_ngroups = ngrp + 1; 1325 1326 bsd_gidset = newcred->cr_groups; 1327 ngrp--; 1328 while (ngrp >= 0) { 1329 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1330 ngrp--; 1331 } 1332 } else 1333 newcred->cr_ngroups = 1; 1334 1335 setsugid(p); 1336 p->p_ucred = newcred; 1337 PROC_UNLOCK(p); 1338 crfree(oldcred); 1339 error = 0; 1340out: 1341 free(linux_gidset, M_LINUX); 1342 return (error); 1343} 1344 1345int 1346linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1347{ 1348 struct ucred *cred; 1349 l_gid_t *linux_gidset; 1350 gid_t *bsd_gidset; 1351 int bsd_gidsetsz, ngrp, error; 1352 1353 cred = td->td_ucred; 1354 bsd_gidset = cred->cr_groups; 1355 bsd_gidsetsz = cred->cr_ngroups - 1; 1356 1357 /* 1358 * cr_groups[0] holds egid. Returning the whole set 1359 * here will cause a duplicate. Exclude cr_groups[0] 1360 * to prevent that. 1361 */ 1362 1363 if ((ngrp = args->gidsetsize) == 0) { 1364 td->td_retval[0] = bsd_gidsetsz; 1365 return (0); 1366 } 1367 1368 if (ngrp < bsd_gidsetsz) 1369 return (EINVAL); 1370 1371 ngrp = 0; 1372 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1373 M_LINUX, M_WAITOK); 1374 while (ngrp < bsd_gidsetsz) { 1375 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1376 ngrp++; 1377 } 1378 1379 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1380 free(linux_gidset, M_LINUX); 1381 if (error) 1382 return (error); 1383 1384 td->td_retval[0] = ngrp; 1385 return (0); 1386} 1387 1388int 1389linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1390{ 1391 struct rlimit bsd_rlim; 1392 struct l_rlimit rlim; 1393 u_int which; 1394 int error; 1395 1396#ifdef DEBUG 1397 if (ldebug(setrlimit)) 1398 printf(ARGS(setrlimit, "%d, %p"), 1399 args->resource, (void *)args->rlim); 1400#endif 1401 1402 if (args->resource >= LINUX_RLIM_NLIMITS) 1403 return (EINVAL); 1404 1405 which = linux_to_bsd_resource[args->resource]; 1406 if (which == -1) 1407 return (EINVAL); 1408 1409 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1410 if (error) 1411 return (error); 1412 1413 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1414 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1415 return (kern_setrlimit(td, which, &bsd_rlim)); 1416} 1417 1418#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1419int 1420linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1421{ 1422 struct l_rlimit rlim; 1423 struct proc *p = td->td_proc; 1424 struct rlimit bsd_rlim; 1425 u_int which; 1426 1427#ifdef DEBUG 1428 if (ldebug(old_getrlimit)) 1429 printf(ARGS(old_getrlimit, "%d, %p"), 1430 args->resource, (void *)args->rlim); 1431#endif 1432 1433 if (args->resource >= LINUX_RLIM_NLIMITS) 1434 return (EINVAL); 1435 1436 which = linux_to_bsd_resource[args->resource]; 1437 if (which == -1) 1438 return (EINVAL); 1439 1440 PROC_LOCK(p); 1441 lim_rlimit(p, which, &bsd_rlim); 1442 PROC_UNLOCK(p); 1443 1444#ifdef COMPAT_LINUX32 1445 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1446 if (rlim.rlim_cur == UINT_MAX) 1447 rlim.rlim_cur = INT_MAX; 1448 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1449 if (rlim.rlim_max == UINT_MAX) 1450 rlim.rlim_max = INT_MAX; 1451#else 1452 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1453 if (rlim.rlim_cur == ULONG_MAX) 1454 rlim.rlim_cur = LONG_MAX; 1455 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1456 if (rlim.rlim_max == ULONG_MAX) 1457 rlim.rlim_max = LONG_MAX; 1458#endif 1459 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1460} 1461#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1462 1463int 1464linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1465{ 1466 struct l_rlimit rlim; 1467 struct proc *p = td->td_proc; 1468 struct rlimit bsd_rlim; 1469 u_int which; 1470 1471#ifdef DEBUG 1472 if (ldebug(getrlimit)) 1473 printf(ARGS(getrlimit, "%d, %p"), 1474 args->resource, (void *)args->rlim); 1475#endif 1476 1477 if (args->resource >= LINUX_RLIM_NLIMITS) 1478 return (EINVAL); 1479 1480 which = linux_to_bsd_resource[args->resource]; 1481 if (which == -1) 1482 return (EINVAL); 1483 1484 PROC_LOCK(p); 1485 lim_rlimit(p, which, &bsd_rlim); 1486 PROC_UNLOCK(p); 1487 1488 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1489 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1490 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1491} 1492 1493int 1494linux_sched_setscheduler(struct thread *td, 1495 struct linux_sched_setscheduler_args *args) 1496{ 1497 struct sched_param sched_param; 1498 struct thread *tdt; 1499 int error, policy; 1500 1501#ifdef DEBUG 1502 if (ldebug(sched_setscheduler)) 1503 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1504 args->pid, args->policy, (const void *)args->param); 1505#endif 1506 1507 switch (args->policy) { 1508 case LINUX_SCHED_OTHER: 1509 policy = SCHED_OTHER; 1510 break; 1511 case LINUX_SCHED_FIFO: 1512 policy = SCHED_FIFO; 1513 break; 1514 case LINUX_SCHED_RR: 1515 policy = SCHED_RR; 1516 break; 1517 default: 1518 return (EINVAL); 1519 } 1520 1521 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1522 if (error) 1523 return (error); 1524 1525 tdt = linux_tdfind(td, args->pid, -1); 1526 if (tdt == NULL) 1527 return (ESRCH); 1528 1529 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1530 PROC_UNLOCK(tdt->td_proc); 1531 return (error); 1532} 1533 1534int 1535linux_sched_getscheduler(struct thread *td, 1536 struct linux_sched_getscheduler_args *args) 1537{ 1538 struct thread *tdt; 1539 int error, policy; 1540 1541#ifdef DEBUG 1542 if (ldebug(sched_getscheduler)) 1543 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1544#endif 1545 1546 tdt = linux_tdfind(td, args->pid, -1); 1547 if (tdt == NULL) 1548 return (ESRCH); 1549 1550 error = kern_sched_getscheduler(td, tdt, &policy); 1551 PROC_UNLOCK(tdt->td_proc); 1552 1553 switch (policy) { 1554 case SCHED_OTHER: 1555 td->td_retval[0] = LINUX_SCHED_OTHER; 1556 break; 1557 case SCHED_FIFO: 1558 td->td_retval[0] = LINUX_SCHED_FIFO; 1559 break; 1560 case SCHED_RR: 1561 td->td_retval[0] = LINUX_SCHED_RR; 1562 break; 1563 } 1564 return (error); 1565} 1566 1567int 1568linux_sched_get_priority_max(struct thread *td, 1569 struct linux_sched_get_priority_max_args *args) 1570{ 1571 struct sched_get_priority_max_args bsd; 1572 1573#ifdef DEBUG 1574 if (ldebug(sched_get_priority_max)) 1575 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1576#endif 1577 1578 switch (args->policy) { 1579 case LINUX_SCHED_OTHER: 1580 bsd.policy = SCHED_OTHER; 1581 break; 1582 case LINUX_SCHED_FIFO: 1583 bsd.policy = SCHED_FIFO; 1584 break; 1585 case LINUX_SCHED_RR: 1586 bsd.policy = SCHED_RR; 1587 break; 1588 default: 1589 return (EINVAL); 1590 } 1591 return (sys_sched_get_priority_max(td, &bsd)); 1592} 1593 1594int 1595linux_sched_get_priority_min(struct thread *td, 1596 struct linux_sched_get_priority_min_args *args) 1597{ 1598 struct sched_get_priority_min_args bsd; 1599 1600#ifdef DEBUG 1601 if (ldebug(sched_get_priority_min)) 1602 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1603#endif 1604 1605 switch (args->policy) { 1606 case LINUX_SCHED_OTHER: 1607 bsd.policy = SCHED_OTHER; 1608 break; 1609 case LINUX_SCHED_FIFO: 1610 bsd.policy = SCHED_FIFO; 1611 break; 1612 case LINUX_SCHED_RR: 1613 bsd.policy = SCHED_RR; 1614 break; 1615 default: 1616 return (EINVAL); 1617 } 1618 return (sys_sched_get_priority_min(td, &bsd)); 1619} 1620 1621#define REBOOT_CAD_ON 0x89abcdef 1622#define REBOOT_CAD_OFF 0 1623#define REBOOT_HALT 0xcdef0123 1624#define REBOOT_RESTART 0x01234567 1625#define REBOOT_RESTART2 0xA1B2C3D4 1626#define REBOOT_POWEROFF 0x4321FEDC 1627#define REBOOT_MAGIC1 0xfee1dead 1628#define REBOOT_MAGIC2 0x28121969 1629#define REBOOT_MAGIC2A 0x05121996 1630#define REBOOT_MAGIC2B 0x16041998 1631 1632int 1633linux_reboot(struct thread *td, struct linux_reboot_args *args) 1634{ 1635 struct reboot_args bsd_args; 1636 1637#ifdef DEBUG 1638 if (ldebug(reboot)) 1639 printf(ARGS(reboot, "0x%x"), args->cmd); 1640#endif 1641 1642 if (args->magic1 != REBOOT_MAGIC1) 1643 return (EINVAL); 1644 1645 switch (args->magic2) { 1646 case REBOOT_MAGIC2: 1647 case REBOOT_MAGIC2A: 1648 case REBOOT_MAGIC2B: 1649 break; 1650 default: 1651 return (EINVAL); 1652 } 1653 1654 switch (args->cmd) { 1655 case REBOOT_CAD_ON: 1656 case REBOOT_CAD_OFF: 1657 return (priv_check(td, PRIV_REBOOT)); 1658 case REBOOT_HALT: 1659 bsd_args.opt = RB_HALT; 1660 break; 1661 case REBOOT_RESTART: 1662 case REBOOT_RESTART2: 1663 bsd_args.opt = 0; 1664 break; 1665 case REBOOT_POWEROFF: 1666 bsd_args.opt = RB_POWEROFF; 1667 break; 1668 default: 1669 return (EINVAL); 1670 } 1671 return (sys_reboot(td, &bsd_args)); 1672} 1673 1674 1675/* 1676 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1677 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1678 * are assumed to be preserved. The following lightweight syscalls fixes 1679 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1680 * 1681 * linux_getpid() - MP SAFE 1682 * linux_getgid() - MP SAFE 1683 * linux_getuid() - MP SAFE 1684 */ 1685 1686int 1687linux_getpid(struct thread *td, struct linux_getpid_args *args) 1688{ 1689 1690#ifdef DEBUG 1691 if (ldebug(getpid)) 1692 printf(ARGS(getpid, "")); 1693#endif 1694 td->td_retval[0] = td->td_proc->p_pid; 1695 1696 return (0); 1697} 1698 1699int 1700linux_gettid(struct thread *td, struct linux_gettid_args *args) 1701{ 1702 struct linux_emuldata *em; 1703 1704#ifdef DEBUG 1705 if (ldebug(gettid)) 1706 printf(ARGS(gettid, "")); 1707#endif 1708 1709 em = em_find(td); 1710 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1711 1712 td->td_retval[0] = em->em_tid; 1713 1714 return (0); 1715} 1716 1717 1718int 1719linux_getppid(struct thread *td, struct linux_getppid_args *args) 1720{ 1721 1722#ifdef DEBUG 1723 if (ldebug(getppid)) 1724 printf(ARGS(getppid, "")); 1725#endif 1726 1727 PROC_LOCK(td->td_proc); 1728 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1729 PROC_UNLOCK(td->td_proc); 1730 return (0); 1731} 1732 1733int 1734linux_getgid(struct thread *td, struct linux_getgid_args *args) 1735{ 1736 1737#ifdef DEBUG 1738 if (ldebug(getgid)) 1739 printf(ARGS(getgid, "")); 1740#endif 1741 1742 td->td_retval[0] = td->td_ucred->cr_rgid; 1743 return (0); 1744} 1745 1746int 1747linux_getuid(struct thread *td, struct linux_getuid_args *args) 1748{ 1749 1750#ifdef DEBUG 1751 if (ldebug(getuid)) 1752 printf(ARGS(getuid, "")); 1753#endif 1754 1755 td->td_retval[0] = td->td_ucred->cr_ruid; 1756 return (0); 1757} 1758 1759 1760int 1761linux_getsid(struct thread *td, struct linux_getsid_args *args) 1762{ 1763 struct getsid_args bsd; 1764 1765#ifdef DEBUG 1766 if (ldebug(getsid)) 1767 printf(ARGS(getsid, "%i"), args->pid); 1768#endif 1769 1770 bsd.pid = args->pid; 1771 return (sys_getsid(td, &bsd)); 1772} 1773 1774int 1775linux_nosys(struct thread *td, struct nosys_args *ignore) 1776{ 1777 1778 return (ENOSYS); 1779} 1780 1781int 1782linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1783{ 1784 struct getpriority_args bsd_args; 1785 int error; 1786 1787#ifdef DEBUG 1788 if (ldebug(getpriority)) 1789 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1790#endif 1791 1792 bsd_args.which = args->which; 1793 bsd_args.who = args->who; 1794 error = sys_getpriority(td, &bsd_args); 1795 td->td_retval[0] = 20 - td->td_retval[0]; 1796 return (error); 1797} 1798 1799int 1800linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1801{ 1802 int name[2]; 1803 1804#ifdef DEBUG 1805 if (ldebug(sethostname)) 1806 printf(ARGS(sethostname, "*, %i"), args->len); 1807#endif 1808 1809 name[0] = CTL_KERN; 1810 name[1] = KERN_HOSTNAME; 1811 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1812 args->len, 0, 0)); 1813} 1814 1815int 1816linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1817{ 1818 int name[2]; 1819 1820#ifdef DEBUG 1821 if (ldebug(setdomainname)) 1822 printf(ARGS(setdomainname, "*, %i"), args->len); 1823#endif 1824 1825 name[0] = CTL_KERN; 1826 name[1] = KERN_NISDOMAINNAME; 1827 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1828 args->len, 0, 0)); 1829} 1830 1831int 1832linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1833{ 1834 1835#ifdef DEBUG 1836 if (ldebug(exit_group)) 1837 printf(ARGS(exit_group, "%i"), args->error_code); 1838#endif 1839 1840 LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid, 1841 args->error_code); 1842 1843 /* 1844 * XXX: we should send a signal to the parent if 1845 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1846 * as it doesnt occur often. 1847 */ 1848 exit1(td, W_EXITCODE(args->error_code, 0)); 1849 /* NOTREACHED */ 1850} 1851 1852#define _LINUX_CAPABILITY_VERSION 0x19980330 1853 1854struct l_user_cap_header { 1855 l_int version; 1856 l_int pid; 1857}; 1858 1859struct l_user_cap_data { 1860 l_int effective; 1861 l_int permitted; 1862 l_int inheritable; 1863}; 1864 1865int 1866linux_capget(struct thread *td, struct linux_capget_args *args) 1867{ 1868 struct l_user_cap_header luch; 1869 struct l_user_cap_data lucd; 1870 int error; 1871 1872 if (args->hdrp == NULL) 1873 return (EFAULT); 1874 1875 error = copyin(args->hdrp, &luch, sizeof(luch)); 1876 if (error != 0) 1877 return (error); 1878 1879 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1880 luch.version = _LINUX_CAPABILITY_VERSION; 1881 error = copyout(&luch, args->hdrp, sizeof(luch)); 1882 if (error) 1883 return (error); 1884 return (EINVAL); 1885 } 1886 1887 if (luch.pid) 1888 return (EPERM); 1889 1890 if (args->datap) { 1891 /* 1892 * The current implementation doesn't support setting 1893 * a capability (it's essentially a stub) so indicate 1894 * that no capabilities are currently set or available 1895 * to request. 1896 */ 1897 bzero (&lucd, sizeof(lucd)); 1898 error = copyout(&lucd, args->datap, sizeof(lucd)); 1899 } 1900 1901 return (error); 1902} 1903 1904int 1905linux_capset(struct thread *td, struct linux_capset_args *args) 1906{ 1907 struct l_user_cap_header luch; 1908 struct l_user_cap_data lucd; 1909 int error; 1910 1911 if (args->hdrp == NULL || args->datap == NULL) 1912 return (EFAULT); 1913 1914 error = copyin(args->hdrp, &luch, sizeof(luch)); 1915 if (error != 0) 1916 return (error); 1917 1918 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1919 luch.version = _LINUX_CAPABILITY_VERSION; 1920 error = copyout(&luch, args->hdrp, sizeof(luch)); 1921 if (error) 1922 return (error); 1923 return (EINVAL); 1924 } 1925 1926 if (luch.pid) 1927 return (EPERM); 1928 1929 error = copyin(args->datap, &lucd, sizeof(lucd)); 1930 if (error != 0) 1931 return (error); 1932 1933 /* We currently don't support setting any capabilities. */ 1934 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1935 linux_msg(td, 1936 "capset effective=0x%x, permitted=0x%x, " 1937 "inheritable=0x%x is not implemented", 1938 (int)lucd.effective, (int)lucd.permitted, 1939 (int)lucd.inheritable); 1940 return (EPERM); 1941 } 1942 1943 return (0); 1944} 1945 1946int 1947linux_prctl(struct thread *td, struct linux_prctl_args *args) 1948{ 1949 int error = 0, max_size; 1950 struct proc *p = td->td_proc; 1951 char comm[LINUX_MAX_COMM_LEN]; 1952 struct linux_emuldata *em; 1953 int pdeath_signal; 1954 1955#ifdef DEBUG 1956 if (ldebug(prctl)) 1957 printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option, 1958 (uintmax_t)args->arg2, (uintmax_t)args->arg3, 1959 (uintmax_t)args->arg4, (uintmax_t)args->arg5); 1960#endif 1961 1962 switch (args->option) { 1963 case LINUX_PR_SET_PDEATHSIG: 1964 if (!LINUX_SIG_VALID(args->arg2)) 1965 return (EINVAL); 1966 em = em_find(td); 1967 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1968 em->pdeath_signal = args->arg2; 1969 break; 1970 case LINUX_PR_GET_PDEATHSIG: 1971 em = em_find(td); 1972 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1973 pdeath_signal = em->pdeath_signal; 1974 error = copyout(&pdeath_signal, 1975 (void *)(register_t)args->arg2, 1976 sizeof(pdeath_signal)); 1977 break; 1978 case LINUX_PR_GET_KEEPCAPS: 1979 /* 1980 * Indicate that we always clear the effective and 1981 * permitted capability sets when the user id becomes 1982 * non-zero (actually the capability sets are simply 1983 * always zero in the current implementation). 1984 */ 1985 td->td_retval[0] = 0; 1986 break; 1987 case LINUX_PR_SET_KEEPCAPS: 1988 /* 1989 * Ignore requests to keep the effective and permitted 1990 * capability sets when the user id becomes non-zero. 1991 */ 1992 break; 1993 case LINUX_PR_SET_NAME: 1994 /* 1995 * To be on the safe side we need to make sure to not 1996 * overflow the size a linux program expects. We already 1997 * do this here in the copyin, so that we don't need to 1998 * check on copyout. 1999 */ 2000 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 2001 error = copyinstr((void *)(register_t)args->arg2, comm, 2002 max_size, NULL); 2003 2004 /* Linux silently truncates the name if it is too long. */ 2005 if (error == ENAMETOOLONG) { 2006 /* 2007 * XXX: copyinstr() isn't documented to populate the 2008 * array completely, so do a copyin() to be on the 2009 * safe side. This should be changed in case 2010 * copyinstr() is changed to guarantee this. 2011 */ 2012 error = copyin((void *)(register_t)args->arg2, comm, 2013 max_size - 1); 2014 comm[max_size - 1] = '\0'; 2015 } 2016 if (error) 2017 return (error); 2018 2019 PROC_LOCK(p); 2020 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 2021 PROC_UNLOCK(p); 2022 break; 2023 case LINUX_PR_GET_NAME: 2024 PROC_LOCK(p); 2025 strlcpy(comm, p->p_comm, sizeof(comm)); 2026 PROC_UNLOCK(p); 2027 error = copyout(comm, (void *)(register_t)args->arg2, 2028 strlen(comm) + 1); 2029 break; 2030 default: 2031 error = EINVAL; 2032 break; 2033 } 2034 2035 return (error); 2036} 2037 2038int 2039linux_sched_setparam(struct thread *td, 2040 struct linux_sched_setparam_args *uap) 2041{ 2042 struct sched_param sched_param; 2043 struct thread *tdt; 2044 int error; 2045 2046#ifdef DEBUG 2047 if (ldebug(sched_setparam)) 2048 printf(ARGS(sched_setparam, "%d, *"), uap->pid); 2049#endif 2050 2051 error = copyin(uap->param, &sched_param, sizeof(sched_param)); 2052 if (error) 2053 return (error); 2054 2055 tdt = linux_tdfind(td, uap->pid, -1); 2056 if (tdt == NULL) 2057 return (ESRCH); 2058 2059 error = kern_sched_setparam(td, tdt, &sched_param); 2060 PROC_UNLOCK(tdt->td_proc); 2061 return (error); 2062} 2063 2064int 2065linux_sched_getparam(struct thread *td, 2066 struct linux_sched_getparam_args *uap) 2067{ 2068 struct sched_param sched_param; 2069 struct thread *tdt; 2070 int error; 2071 2072#ifdef DEBUG 2073 if (ldebug(sched_getparam)) 2074 printf(ARGS(sched_getparam, "%d, *"), uap->pid); 2075#endif 2076 2077 tdt = linux_tdfind(td, uap->pid, -1); 2078 if (tdt == NULL) 2079 return (ESRCH); 2080 2081 error = kern_sched_getparam(td, tdt, &sched_param); 2082 PROC_UNLOCK(tdt->td_proc); 2083 if (error == 0) 2084 error = copyout(&sched_param, uap->param, 2085 sizeof(sched_param)); 2086 return (error); 2087} 2088 2089/* 2090 * Get affinity of a process. 2091 */ 2092int 2093linux_sched_getaffinity(struct thread *td, 2094 struct linux_sched_getaffinity_args *args) 2095{ 2096 int error; 2097 struct thread *tdt; 2098 struct cpuset_getaffinity_args cga; 2099 2100#ifdef DEBUG 2101 if (ldebug(sched_getaffinity)) 2102 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2103 args->len); 2104#endif 2105 if (args->len < sizeof(cpuset_t)) 2106 return (EINVAL); 2107 2108 tdt = linux_tdfind(td, args->pid, -1); 2109 if (tdt == NULL) 2110 return (ESRCH); 2111 2112 PROC_UNLOCK(tdt->td_proc); 2113 cga.level = CPU_LEVEL_WHICH; 2114 cga.which = CPU_WHICH_TID; 2115 cga.id = tdt->td_tid; 2116 cga.cpusetsize = sizeof(cpuset_t); 2117 cga.mask = (cpuset_t *) args->user_mask_ptr; 2118 2119 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 2120 td->td_retval[0] = sizeof(cpuset_t); 2121 2122 return (error); 2123} 2124 2125/* 2126 * Set affinity of a process. 2127 */ 2128int 2129linux_sched_setaffinity(struct thread *td, 2130 struct linux_sched_setaffinity_args *args) 2131{ 2132 struct cpuset_setaffinity_args csa; 2133 struct thread *tdt; 2134 2135#ifdef DEBUG 2136 if (ldebug(sched_setaffinity)) 2137 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2138 args->len); 2139#endif 2140 if (args->len < sizeof(cpuset_t)) 2141 return (EINVAL); 2142 2143 tdt = linux_tdfind(td, args->pid, -1); 2144 if (tdt == NULL) 2145 return (ESRCH); 2146 2147 PROC_UNLOCK(tdt->td_proc); 2148 csa.level = CPU_LEVEL_WHICH; 2149 csa.which = CPU_WHICH_TID; 2150 csa.id = tdt->td_tid; 2151 csa.cpusetsize = sizeof(cpuset_t); 2152 csa.mask = (cpuset_t *) args->user_mask_ptr; 2153 2154 return (sys_cpuset_setaffinity(td, &csa)); 2155} 2156 2157struct linux_rlimit64 { 2158 uint64_t rlim_cur; 2159 uint64_t rlim_max; 2160}; 2161 2162int 2163linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2164{ 2165 struct rlimit rlim, nrlim; 2166 struct linux_rlimit64 lrlim; 2167 struct proc *p; 2168 u_int which; 2169 int flags; 2170 int error; 2171 2172#ifdef DEBUG 2173 if (ldebug(prlimit64)) 2174 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2175 args->resource, (void *)args->new, (void *)args->old); 2176#endif 2177 2178 if (args->resource >= LINUX_RLIM_NLIMITS) 2179 return (EINVAL); 2180 2181 which = linux_to_bsd_resource[args->resource]; 2182 if (which == -1) 2183 return (EINVAL); 2184 2185 if (args->new != NULL) { 2186 /* 2187 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2188 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2189 * as INFINITY so we do not need a conversion even. 2190 */ 2191 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2192 if (error != 0) 2193 return (error); 2194 } 2195 2196 flags = PGET_HOLD | PGET_NOTWEXIT; 2197 if (args->new != NULL) 2198 flags |= PGET_CANDEBUG; 2199 else 2200 flags |= PGET_CANSEE; 2201 error = pget(args->pid, flags, &p); 2202 if (error != 0) 2203 return (error); 2204 2205 if (args->old != NULL) { 2206 PROC_LOCK(p); 2207 lim_rlimit(p, which, &rlim); 2208 PROC_UNLOCK(p); 2209 if (rlim.rlim_cur == RLIM_INFINITY) 2210 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2211 else 2212 lrlim.rlim_cur = rlim.rlim_cur; 2213 if (rlim.rlim_max == RLIM_INFINITY) 2214 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2215 else 2216 lrlim.rlim_max = rlim.rlim_max; 2217 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2218 if (error != 0) 2219 goto out; 2220 } 2221 2222 if (args->new != NULL) 2223 error = kern_proc_setrlimit(td, p, which, &nrlim); 2224 2225 out: 2226 PRELE(p); 2227 return (error); 2228} 2229 2230int 2231linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2232{ 2233 struct timeval utv, tv0, tv1, *tvp; 2234 struct l_pselect6arg lpse6; 2235 struct l_timespec lts; 2236 struct timespec uts; 2237 l_sigset_t l_ss; 2238 sigset_t *ssp; 2239 sigset_t ss; 2240 int error; 2241 2242 ssp = NULL; 2243 if (args->sig != NULL) { 2244 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2245 if (error != 0) 2246 return (error); 2247 if (lpse6.ss_len != sizeof(l_ss)) 2248 return (EINVAL); 2249 if (lpse6.ss != 0) { 2250 error = copyin(PTRIN(lpse6.ss), &l_ss, 2251 sizeof(l_ss)); 2252 if (error != 0) 2253 return (error); 2254 linux_to_bsd_sigset(&l_ss, &ss); 2255 ssp = &ss; 2256 } 2257 } 2258 2259 /* 2260 * Currently glibc changes nanosecond number to microsecond. 2261 * This mean losing precision but for now it is hardly seen. 2262 */ 2263 if (args->tsp != NULL) { 2264 error = copyin(args->tsp, <s, sizeof(lts)); 2265 if (error != 0) 2266 return (error); 2267 error = linux_to_native_timespec(&uts, <s); 2268 if (error != 0) 2269 return (error); 2270 2271 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2272 if (itimerfix(&utv)) 2273 return (EINVAL); 2274 2275 microtime(&tv0); 2276 tvp = &utv; 2277 } else 2278 tvp = NULL; 2279 2280 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2281 args->exceptfds, tvp, ssp, LINUX_NFDBITS); 2282 2283 if (error == 0 && args->tsp != NULL) { 2284 if (td->td_retval[0] != 0) { 2285 /* 2286 * Compute how much time was left of the timeout, 2287 * by subtracting the current time and the time 2288 * before we started the call, and subtracting 2289 * that result from the user-supplied value. 2290 */ 2291 2292 microtime(&tv1); 2293 timevalsub(&tv1, &tv0); 2294 timevalsub(&utv, &tv1); 2295 if (utv.tv_sec < 0) 2296 timevalclear(&utv); 2297 } else 2298 timevalclear(&utv); 2299 2300 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2301 2302 native_to_linux_timespec(<s, &uts); 2303 error = copyout(<s, args->tsp, sizeof(lts)); 2304 } 2305 2306 return (error); 2307} 2308 2309int 2310linux_ppoll(struct thread *td, struct linux_ppoll_args *args) 2311{ 2312 struct timespec ts0, ts1; 2313 struct l_timespec lts; 2314 struct timespec uts, *tsp; 2315 l_sigset_t l_ss; 2316 sigset_t *ssp; 2317 sigset_t ss; 2318 int error; 2319 2320 if (args->sset != NULL) { 2321 if (args->ssize != sizeof(l_ss)) 2322 return (EINVAL); 2323 error = copyin(args->sset, &l_ss, sizeof(l_ss)); 2324 if (error) 2325 return (error); 2326 linux_to_bsd_sigset(&l_ss, &ss); 2327 ssp = &ss; 2328 } else 2329 ssp = NULL; 2330 if (args->tsp != NULL) { 2331 error = copyin(args->tsp, <s, sizeof(lts)); 2332 if (error) 2333 return (error); 2334 error = linux_to_native_timespec(&uts, <s); 2335 if (error != 0) 2336 return (error); 2337 2338 nanotime(&ts0); 2339 tsp = &uts; 2340 } else 2341 tsp = NULL; 2342 2343 error = kern_poll(td, args->fds, args->nfds, tsp, ssp); 2344 2345 if (error == 0 && args->tsp != NULL) { 2346 if (td->td_retval[0]) { 2347 nanotime(&ts1); 2348 timespecsub(&ts1, &ts0); 2349 timespecsub(&uts, &ts1); 2350 if (uts.tv_sec < 0) 2351 timespecclear(&uts); 2352 } else 2353 timespecclear(&uts); 2354 2355 native_to_linux_timespec(<s, &uts); 2356 error = copyout(<s, args->tsp, sizeof(lts)); 2357 } 2358 2359 return (error); 2360} 2361 2362#if defined(DEBUG) || defined(KTR) 2363/* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2364 2365#ifdef COMPAT_LINUX32 2366#define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL 2367#else 2368#define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL 2369#endif 2370 2371u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))]; 2372 2373static int 2374linux_debug(int syscall, int toggle, int global) 2375{ 2376 2377 if (global) { 2378 char c = toggle ? 0 : 0xff; 2379 2380 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2381 return (0); 2382 } 2383 if (syscall < 0 || syscall >= L_MAXSYSCALL) 2384 return (EINVAL); 2385 if (toggle) 2386 clrbit(linux_debug_map, syscall); 2387 else 2388 setbit(linux_debug_map, syscall); 2389 return (0); 2390} 2391#undef L_MAXSYSCALL 2392 2393/* 2394 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2395 * 2396 * E.g.: sysctl linux.debug=21.0 2397 * 2398 * As a special case, syscall "all" will apply to all syscalls globally. 2399 */ 2400#define LINUX_MAX_DEBUGSTR 16 2401int 2402linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2403{ 2404 char value[LINUX_MAX_DEBUGSTR], *p; 2405 int error, sysc, toggle; 2406 int global = 0; 2407 2408 value[0] = '\0'; 2409 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2410 if (error || req->newptr == NULL) 2411 return (error); 2412 for (p = value; *p != '\0' && *p != '.'; p++); 2413 if (*p == '\0') 2414 return (EINVAL); 2415 *p++ = '\0'; 2416 sysc = strtol(value, NULL, 0); 2417 toggle = strtol(p, NULL, 0); 2418 if (strcmp(value, "all") == 0) 2419 global = 1; 2420 error = linux_debug(sysc, toggle, global); 2421 return (error); 2422} 2423 2424#endif /* DEBUG || KTR */ 2425 2426int 2427linux_sched_rr_get_interval(struct thread *td, 2428 struct linux_sched_rr_get_interval_args *uap) 2429{ 2430 struct timespec ts; 2431 struct l_timespec lts; 2432 struct thread *tdt; 2433 int error; 2434 2435 /* 2436 * According to man in case the invalid pid specified 2437 * EINVAL should be returned. 2438 */ 2439 if (uap->pid < 0) 2440 return (EINVAL); 2441 2442 tdt = linux_tdfind(td, uap->pid, -1); 2443 if (tdt == NULL) 2444 return (ESRCH); 2445 2446 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2447 PROC_UNLOCK(tdt->td_proc); 2448 if (error != 0) 2449 return (error); 2450 native_to_linux_timespec(<s, &ts); 2451 return (copyout(<s, uap->interval, sizeof(lts))); 2452} 2453 2454/* 2455 * In case when the Linux thread is the initial thread in 2456 * the thread group thread id is equal to the process id. 2457 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2458 */ 2459struct thread * 2460linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2461{ 2462 struct linux_emuldata *em; 2463 struct thread *tdt; 2464 struct proc *p; 2465 2466 tdt = NULL; 2467 if (tid == 0 || tid == td->td_tid) { 2468 tdt = td; 2469 PROC_LOCK(tdt->td_proc); 2470 } else if (tid > PID_MAX) 2471 tdt = tdfind(tid, pid); 2472 else { 2473 /* 2474 * Initial thread where the tid equal to the pid. 2475 */ 2476 p = pfind(tid); 2477 if (p != NULL) { 2478 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2479 /* 2480 * p is not a Linuxulator process. 2481 */ 2482 PROC_UNLOCK(p); 2483 return (NULL); 2484 } 2485 FOREACH_THREAD_IN_PROC(p, tdt) { 2486 em = em_find(tdt); 2487 if (tid == em->em_tid) 2488 return (tdt); 2489 } 2490 PROC_UNLOCK(p); 2491 } 2492 return (NULL); 2493 } 2494 2495 return (tdt); 2496} 2497 2498void 2499linux_to_bsd_waitopts(int options, int *bsdopts) 2500{ 2501 2502 if (options & LINUX_WNOHANG) 2503 *bsdopts |= WNOHANG; 2504 if (options & LINUX_WUNTRACED) 2505 *bsdopts |= WUNTRACED; 2506 if (options & LINUX_WEXITED) 2507 *bsdopts |= WEXITED; 2508 if (options & LINUX_WCONTINUED) 2509 *bsdopts |= WCONTINUED; 2510 if (options & LINUX_WNOWAIT) 2511 *bsdopts |= WNOWAIT; 2512 2513 if (options & __WCLONE) 2514 *bsdopts |= WLINUXCLONE; 2515} 2516