linux_misc.c revision 302962
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 302962 2016-07-17 15:07:33Z 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_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 bzero(&sysinfo, sizeof(sysinfo)); 154 getnanouptime(&ts); 155 if (ts.tv_nsec != 0) 156 ts.tv_sec++; 157 sysinfo.uptime = ts.tv_sec; 158 159 /* Use the information from the mib to get our load averages */ 160 for (i = 0; i < 3; i++) 161 sysinfo.loads[i] = averunnable.ldavg[i] * 162 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 163 164 sysinfo.totalram = physmem * PAGE_SIZE; 165 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 166 167 sysinfo.sharedram = 0; 168 mtx_lock(&vm_object_list_mtx); 169 TAILQ_FOREACH(object, &vm_object_list, object_list) 170 if (object->shadow_count > 1) 171 sysinfo.sharedram += object->resident_page_count; 172 mtx_unlock(&vm_object_list_mtx); 173 174 sysinfo.sharedram *= PAGE_SIZE; 175 sysinfo.bufferram = 0; 176 177 swap_pager_status(&i, &j); 178 sysinfo.totalswap = i * PAGE_SIZE; 179 sysinfo.freeswap = (i - j) * PAGE_SIZE; 180 181 sysinfo.procs = nprocs; 182 183 /* The following are only present in newer Linux kernels. */ 184 sysinfo.totalbig = 0; 185 sysinfo.freebig = 0; 186 sysinfo.mem_unit = 1; 187 188 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 189} 190 191int 192linux_alarm(struct thread *td, struct linux_alarm_args *args) 193{ 194 struct itimerval it, old_it; 195 u_int secs; 196 int error; 197 198#ifdef DEBUG 199 if (ldebug(alarm)) 200 printf(ARGS(alarm, "%u"), args->secs); 201#endif 202 secs = args->secs; 203 /* 204 * Linux alarm() is always successful. Limit secs to INT32_MAX / 2 205 * to match kern_setitimer()'s limit to avoid error from it. 206 * 207 * XXX. Linux limit secs to INT_MAX on 32 and does not limit on 64-bit 208 * platforms. 209 */ 210 if (secs > INT32_MAX / 2) 211 secs = INT32_MAX / 2; 212 213 it.it_value.tv_sec = secs; 214 it.it_value.tv_usec = 0; 215 timevalclear(&it.it_interval); 216 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 217 KASSERT(error == 0, ("kern_setitimer returns %d", error)); 218 219 if ((old_it.it_value.tv_sec == 0 && old_it.it_value.tv_usec > 0) || 220 old_it.it_value.tv_usec >= 500000) 221 old_it.it_value.tv_sec++; 222 td->td_retval[0] = old_it.it_value.tv_sec; 223 return (0); 224} 225 226int 227linux_brk(struct thread *td, struct linux_brk_args *args) 228{ 229 struct vmspace *vm = td->td_proc->p_vmspace; 230 vm_offset_t new, old; 231 struct obreak_args /* { 232 char * nsize; 233 } */ tmp; 234 235#ifdef DEBUG 236 if (ldebug(brk)) 237 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 238#endif 239 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 240 new = (vm_offset_t)args->dsend; 241 tmp.nsize = (char *)new; 242 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 243 td->td_retval[0] = (long)new; 244 else 245 td->td_retval[0] = (long)old; 246 247 return (0); 248} 249 250#if defined(__i386__) 251/* XXX: what about amd64/linux32? */ 252 253int 254linux_uselib(struct thread *td, struct linux_uselib_args *args) 255{ 256 struct nameidata ni; 257 struct vnode *vp; 258 struct exec *a_out; 259 struct vattr attr; 260 vm_offset_t vmaddr; 261 unsigned long file_offset; 262 unsigned long bss_size; 263 char *library; 264 ssize_t aresid; 265 int error, locked, writecount; 266 267 LCONVPATHEXIST(td, args->library, &library); 268 269#ifdef DEBUG 270 if (ldebug(uselib)) 271 printf(ARGS(uselib, "%s"), library); 272#endif 273 274 a_out = NULL; 275 locked = 0; 276 vp = NULL; 277 278 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1, 279 UIO_SYSSPACE, library, td); 280 error = namei(&ni); 281 LFREEPATH(library); 282 if (error) 283 goto cleanup; 284 285 vp = ni.ni_vp; 286 NDFREE(&ni, NDF_ONLY_PNBUF); 287 288 /* 289 * From here on down, we have a locked vnode that must be unlocked. 290 * XXX: The code below largely duplicates exec_check_permissions(). 291 */ 292 locked = 1; 293 294 /* Writable? */ 295 error = VOP_GET_WRITECOUNT(vp, &writecount); 296 if (error != 0) 297 goto cleanup; 298 if (writecount != 0) { 299 error = ETXTBSY; 300 goto cleanup; 301 } 302 303 /* Executable? */ 304 error = VOP_GETATTR(vp, &attr, td->td_ucred); 305 if (error) 306 goto cleanup; 307 308 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 309 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 310 /* EACCESS is what exec(2) returns. */ 311 error = ENOEXEC; 312 goto cleanup; 313 } 314 315 /* Sensible size? */ 316 if (attr.va_size == 0) { 317 error = ENOEXEC; 318 goto cleanup; 319 } 320 321 /* Can we access it? */ 322 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 323 if (error) 324 goto cleanup; 325 326 /* 327 * XXX: This should use vn_open() so that it is properly authorized, 328 * and to reduce code redundancy all over the place here. 329 * XXX: Not really, it duplicates far more of exec_check_permissions() 330 * than vn_open(). 331 */ 332#ifdef MAC 333 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 334 if (error) 335 goto cleanup; 336#endif 337 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 338 if (error) 339 goto cleanup; 340 341 /* Pull in executable header into exec_map */ 342 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 343 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 344 if (error) 345 goto cleanup; 346 347 /* Is it a Linux binary ? */ 348 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 349 error = ENOEXEC; 350 goto cleanup; 351 } 352 353 /* 354 * While we are here, we should REALLY do some more checks 355 */ 356 357 /* Set file/virtual offset based on a.out variant. */ 358 switch ((int)(a_out->a_magic & 0xffff)) { 359 case 0413: /* ZMAGIC */ 360 file_offset = 1024; 361 break; 362 case 0314: /* QMAGIC */ 363 file_offset = 0; 364 break; 365 default: 366 error = ENOEXEC; 367 goto cleanup; 368 } 369 370 bss_size = round_page(a_out->a_bss); 371 372 /* Check various fields in header for validity/bounds. */ 373 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 374 error = ENOEXEC; 375 goto cleanup; 376 } 377 378 /* text + data can't exceed file size */ 379 if (a_out->a_data + a_out->a_text > attr.va_size) { 380 error = EFAULT; 381 goto cleanup; 382 } 383 384 /* 385 * text/data/bss must not exceed limits 386 * XXX - this is not complete. it should check current usage PLUS 387 * the resources needed by this library. 388 */ 389 PROC_LOCK(td->td_proc); 390 if (a_out->a_text > maxtsiz || 391 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) || 392 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 393 bss_size) != 0) { 394 PROC_UNLOCK(td->td_proc); 395 error = ENOMEM; 396 goto cleanup; 397 } 398 PROC_UNLOCK(td->td_proc); 399 400 /* 401 * Prevent more writers. 402 * XXX: Note that if any of the VM operations fail below we don't 403 * clear this flag. 404 */ 405 VOP_SET_TEXT(vp); 406 407 /* 408 * Lock no longer needed 409 */ 410 locked = 0; 411 VOP_UNLOCK(vp, 0); 412 413 /* 414 * Check if file_offset page aligned. Currently we cannot handle 415 * misalinged file offsets, and so we read in the entire image 416 * (what a waste). 417 */ 418 if (file_offset & PAGE_MASK) { 419#ifdef DEBUG 420 printf("uselib: Non page aligned binary %lu\n", file_offset); 421#endif 422 /* Map text+data read/write/execute */ 423 424 /* a_entry is the load address and is page aligned */ 425 vmaddr = trunc_page(a_out->a_entry); 426 427 /* get anon user mapping, read+write+execute */ 428 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 429 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE, 430 VM_PROT_ALL, VM_PROT_ALL, 0); 431 if (error) 432 goto cleanup; 433 434 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 435 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 436 td->td_ucred, NOCRED, &aresid, td); 437 if (error != 0) 438 goto cleanup; 439 if (aresid != 0) { 440 error = ENOEXEC; 441 goto cleanup; 442 } 443 } else { 444#ifdef DEBUG 445 printf("uselib: Page aligned binary %lu\n", file_offset); 446#endif 447 /* 448 * for QMAGIC, a_entry is 20 bytes beyond the load address 449 * to skip the executable header 450 */ 451 vmaddr = trunc_page(a_out->a_entry); 452 453 /* 454 * Map it all into the process's space as a single 455 * copy-on-write "data" segment. 456 */ 457 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 458 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 459 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 460 if (error) 461 goto cleanup; 462 } 463#ifdef DEBUG 464 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 465 ((long *)vmaddr)[1]); 466#endif 467 if (bss_size != 0) { 468 /* Calculate BSS start address */ 469 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 470 a_out->a_data; 471 472 /* allocate some 'anon' space */ 473 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 474 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, 475 VM_PROT_ALL, 0); 476 if (error) 477 goto cleanup; 478 } 479 480cleanup: 481 /* Unlock vnode if needed */ 482 if (locked) 483 VOP_UNLOCK(vp, 0); 484 485 /* Release the temporary mapping. */ 486 if (a_out) 487 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 488 489 return (error); 490} 491 492#endif /* __i386__ */ 493 494int 495linux_select(struct thread *td, struct linux_select_args *args) 496{ 497 l_timeval ltv; 498 struct timeval tv0, tv1, utv, *tvp; 499 int error; 500 501#ifdef DEBUG 502 if (ldebug(select)) 503 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 504 (void *)args->readfds, (void *)args->writefds, 505 (void *)args->exceptfds, (void *)args->timeout); 506#endif 507 508 /* 509 * Store current time for computation of the amount of 510 * time left. 511 */ 512 if (args->timeout) { 513 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 514 goto select_out; 515 utv.tv_sec = ltv.tv_sec; 516 utv.tv_usec = ltv.tv_usec; 517#ifdef DEBUG 518 if (ldebug(select)) 519 printf(LMSG("incoming timeout (%jd/%ld)"), 520 (intmax_t)utv.tv_sec, utv.tv_usec); 521#endif 522 523 if (itimerfix(&utv)) { 524 /* 525 * The timeval was invalid. Convert it to something 526 * valid that will act as it does under Linux. 527 */ 528 utv.tv_sec += utv.tv_usec / 1000000; 529 utv.tv_usec %= 1000000; 530 if (utv.tv_usec < 0) { 531 utv.tv_sec -= 1; 532 utv.tv_usec += 1000000; 533 } 534 if (utv.tv_sec < 0) 535 timevalclear(&utv); 536 } 537 microtime(&tv0); 538 tvp = &utv; 539 } else 540 tvp = NULL; 541 542 error = kern_select(td, args->nfds, args->readfds, args->writefds, 543 args->exceptfds, tvp, LINUX_NFDBITS); 544 545#ifdef DEBUG 546 if (ldebug(select)) 547 printf(LMSG("real select returns %d"), error); 548#endif 549 if (error) 550 goto select_out; 551 552 if (args->timeout) { 553 if (td->td_retval[0]) { 554 /* 555 * Compute how much time was left of the timeout, 556 * by subtracting the current time and the time 557 * before we started the call, and subtracting 558 * that result from the user-supplied value. 559 */ 560 microtime(&tv1); 561 timevalsub(&tv1, &tv0); 562 timevalsub(&utv, &tv1); 563 if (utv.tv_sec < 0) 564 timevalclear(&utv); 565 } else 566 timevalclear(&utv); 567#ifdef DEBUG 568 if (ldebug(select)) 569 printf(LMSG("outgoing timeout (%jd/%ld)"), 570 (intmax_t)utv.tv_sec, utv.tv_usec); 571#endif 572 ltv.tv_sec = utv.tv_sec; 573 ltv.tv_usec = utv.tv_usec; 574 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 575 goto select_out; 576 } 577 578select_out: 579#ifdef DEBUG 580 if (ldebug(select)) 581 printf(LMSG("select_out -> %d"), error); 582#endif 583 return (error); 584} 585 586int 587linux_mremap(struct thread *td, struct linux_mremap_args *args) 588{ 589 struct munmap_args /* { 590 void *addr; 591 size_t len; 592 } */ bsd_args; 593 int error = 0; 594 595#ifdef DEBUG 596 if (ldebug(mremap)) 597 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 598 (void *)(uintptr_t)args->addr, 599 (unsigned long)args->old_len, 600 (unsigned long)args->new_len, 601 (unsigned long)args->flags); 602#endif 603 604 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 605 td->td_retval[0] = 0; 606 return (EINVAL); 607 } 608 609 /* 610 * Check for the page alignment. 611 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 612 */ 613 if (args->addr & PAGE_MASK) { 614 td->td_retval[0] = 0; 615 return (EINVAL); 616 } 617 618 args->new_len = round_page(args->new_len); 619 args->old_len = round_page(args->old_len); 620 621 if (args->new_len > args->old_len) { 622 td->td_retval[0] = 0; 623 return (ENOMEM); 624 } 625 626 if (args->new_len < args->old_len) { 627 bsd_args.addr = 628 (caddr_t)((uintptr_t)args->addr + args->new_len); 629 bsd_args.len = args->old_len - args->new_len; 630 error = sys_munmap(td, &bsd_args); 631 } 632 633 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 634 return (error); 635} 636 637#define LINUX_MS_ASYNC 0x0001 638#define LINUX_MS_INVALIDATE 0x0002 639#define LINUX_MS_SYNC 0x0004 640 641int 642linux_msync(struct thread *td, struct linux_msync_args *args) 643{ 644 struct msync_args bsd_args; 645 646 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 647 bsd_args.len = (uintptr_t)args->len; 648 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 649 650 return (sys_msync(td, &bsd_args)); 651} 652 653int 654linux_time(struct thread *td, struct linux_time_args *args) 655{ 656 struct timeval tv; 657 l_time_t tm; 658 int error; 659 660#ifdef DEBUG 661 if (ldebug(time)) 662 printf(ARGS(time, "*")); 663#endif 664 665 microtime(&tv); 666 tm = tv.tv_sec; 667 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 668 return (error); 669 td->td_retval[0] = tm; 670 return (0); 671} 672 673struct l_times_argv { 674 l_clock_t tms_utime; 675 l_clock_t tms_stime; 676 l_clock_t tms_cutime; 677 l_clock_t tms_cstime; 678}; 679 680 681/* 682 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 683 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 684 * auxiliary vector entry. 685 */ 686#define CLK_TCK 100 687 688#define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 689#define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 690 691#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 692 CONVNTCK(r) : CONVOTCK(r)) 693 694int 695linux_times(struct thread *td, struct linux_times_args *args) 696{ 697 struct timeval tv, utime, stime, cutime, cstime; 698 struct l_times_argv tms; 699 struct proc *p; 700 int error; 701 702#ifdef DEBUG 703 if (ldebug(times)) 704 printf(ARGS(times, "*")); 705#endif 706 707 if (args->buf != NULL) { 708 p = td->td_proc; 709 PROC_LOCK(p); 710 PROC_STATLOCK(p); 711 calcru(p, &utime, &stime); 712 PROC_STATUNLOCK(p); 713 calccru(p, &cutime, &cstime); 714 PROC_UNLOCK(p); 715 716 tms.tms_utime = CONVTCK(utime); 717 tms.tms_stime = CONVTCK(stime); 718 719 tms.tms_cutime = CONVTCK(cutime); 720 tms.tms_cstime = CONVTCK(cstime); 721 722 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 723 return (error); 724 } 725 726 microuptime(&tv); 727 td->td_retval[0] = (int)CONVTCK(tv); 728 return (0); 729} 730 731int 732linux_newuname(struct thread *td, struct linux_newuname_args *args) 733{ 734 struct l_new_utsname utsname; 735 char osname[LINUX_MAX_UTSNAME]; 736 char osrelease[LINUX_MAX_UTSNAME]; 737 char *p; 738 739#ifdef DEBUG 740 if (ldebug(newuname)) 741 printf(ARGS(newuname, "*")); 742#endif 743 744 linux_get_osname(td, osname); 745 linux_get_osrelease(td, osrelease); 746 747 bzero(&utsname, sizeof(utsname)); 748 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 749 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 750 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 751 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 752 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 753 for (p = utsname.version; *p != '\0'; ++p) 754 if (*p == '\n') { 755 *p = '\0'; 756 break; 757 } 758 strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME); 759 760 return (copyout(&utsname, args->buf, sizeof(utsname))); 761} 762 763struct l_utimbuf { 764 l_time_t l_actime; 765 l_time_t l_modtime; 766}; 767 768int 769linux_utime(struct thread *td, struct linux_utime_args *args) 770{ 771 struct timeval tv[2], *tvp; 772 struct l_utimbuf lut; 773 char *fname; 774 int error; 775 776 LCONVPATHEXIST(td, args->fname, &fname); 777 778#ifdef DEBUG 779 if (ldebug(utime)) 780 printf(ARGS(utime, "%s, *"), fname); 781#endif 782 783 if (args->times) { 784 if ((error = copyin(args->times, &lut, sizeof lut))) { 785 LFREEPATH(fname); 786 return (error); 787 } 788 tv[0].tv_sec = lut.l_actime; 789 tv[0].tv_usec = 0; 790 tv[1].tv_sec = lut.l_modtime; 791 tv[1].tv_usec = 0; 792 tvp = tv; 793 } else 794 tvp = NULL; 795 796 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 797 LFREEPATH(fname); 798 return (error); 799} 800 801int 802linux_utimes(struct thread *td, struct linux_utimes_args *args) 803{ 804 l_timeval ltv[2]; 805 struct timeval tv[2], *tvp = NULL; 806 char *fname; 807 int error; 808 809 LCONVPATHEXIST(td, args->fname, &fname); 810 811#ifdef DEBUG 812 if (ldebug(utimes)) 813 printf(ARGS(utimes, "%s, *"), fname); 814#endif 815 816 if (args->tptr != NULL) { 817 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 818 LFREEPATH(fname); 819 return (error); 820 } 821 tv[0].tv_sec = ltv[0].tv_sec; 822 tv[0].tv_usec = ltv[0].tv_usec; 823 tv[1].tv_sec = ltv[1].tv_sec; 824 tv[1].tv_usec = ltv[1].tv_usec; 825 tvp = tv; 826 } 827 828 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 829 LFREEPATH(fname); 830 return (error); 831} 832 833static int 834linux_utimensat_nsec_valid(l_long nsec) 835{ 836 837 if (nsec == LINUX_UTIME_OMIT || nsec == LINUX_UTIME_NOW) 838 return (0); 839 if (nsec >= 0 && nsec <= 999999999) 840 return (0); 841 return (1); 842} 843 844int 845linux_utimensat(struct thread *td, struct linux_utimensat_args *args) 846{ 847 struct l_timespec l_times[2]; 848 struct timespec times[2], *timesp = NULL; 849 char *path = NULL; 850 int error, dfd, flags = 0; 851 852 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 853 854#ifdef DEBUG 855 if (ldebug(utimensat)) 856 printf(ARGS(utimensat, "%d, *"), dfd); 857#endif 858 859 if (args->flags & ~LINUX_AT_SYMLINK_NOFOLLOW) 860 return (EINVAL); 861 862 if (args->times != NULL) { 863 error = copyin(args->times, l_times, sizeof(l_times)); 864 if (error != 0) 865 return (error); 866 867 if (linux_utimensat_nsec_valid(l_times[0].tv_nsec) != 0 || 868 linux_utimensat_nsec_valid(l_times[1].tv_nsec) != 0) 869 return (EINVAL); 870 871 times[0].tv_sec = l_times[0].tv_sec; 872 switch (l_times[0].tv_nsec) 873 { 874 case LINUX_UTIME_OMIT: 875 times[0].tv_nsec = UTIME_OMIT; 876 break; 877 case LINUX_UTIME_NOW: 878 times[0].tv_nsec = UTIME_NOW; 879 break; 880 default: 881 times[0].tv_nsec = l_times[0].tv_nsec; 882 } 883 884 times[1].tv_sec = l_times[1].tv_sec; 885 switch (l_times[1].tv_nsec) 886 { 887 case LINUX_UTIME_OMIT: 888 times[1].tv_nsec = UTIME_OMIT; 889 break; 890 case LINUX_UTIME_NOW: 891 times[1].tv_nsec = UTIME_NOW; 892 break; 893 default: 894 times[1].tv_nsec = l_times[1].tv_nsec; 895 break; 896 } 897 timesp = times; 898 899 /* This breaks POSIX, but is what the Linux kernel does 900 * _on purpose_ (documented in the man page for utimensat(2)), 901 * so we must follow that behaviour. */ 902 if (times[0].tv_nsec == UTIME_OMIT && 903 times[1].tv_nsec == UTIME_OMIT) 904 return (0); 905 } 906 907 if (args->pathname != NULL) 908 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 909 else if (args->flags != 0) 910 return (EINVAL); 911 912 if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) 913 flags |= AT_SYMLINK_NOFOLLOW; 914 915 if (path == NULL) 916 error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE); 917 else { 918 error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp, 919 UIO_SYSSPACE, flags); 920 LFREEPATH(path); 921 } 922 923 return (error); 924} 925 926int 927linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 928{ 929 l_timeval ltv[2]; 930 struct timeval tv[2], *tvp = NULL; 931 char *fname; 932 int error, dfd; 933 934 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 935 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 936 937#ifdef DEBUG 938 if (ldebug(futimesat)) 939 printf(ARGS(futimesat, "%s, *"), fname); 940#endif 941 942 if (args->utimes != NULL) { 943 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 944 LFREEPATH(fname); 945 return (error); 946 } 947 tv[0].tv_sec = ltv[0].tv_sec; 948 tv[0].tv_usec = ltv[0].tv_usec; 949 tv[1].tv_sec = ltv[1].tv_sec; 950 tv[1].tv_usec = ltv[1].tv_usec; 951 tvp = tv; 952 } 953 954 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 955 LFREEPATH(fname); 956 return (error); 957} 958 959int 960linux_common_wait(struct thread *td, int pid, int *status, 961 int options, struct rusage *ru) 962{ 963 int error, tmpstat; 964 965 error = kern_wait(td, pid, &tmpstat, options, ru); 966 if (error) 967 return (error); 968 969 if (status) { 970 tmpstat &= 0xffff; 971 if (WIFSIGNALED(tmpstat)) 972 tmpstat = (tmpstat & 0xffffff80) | 973 bsd_to_linux_signal(WTERMSIG(tmpstat)); 974 else if (WIFSTOPPED(tmpstat)) 975 tmpstat = (tmpstat & 0xffff00ff) | 976 (bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8); 977 else if (WIFCONTINUED(tmpstat)) 978 tmpstat = 0xffff; 979 error = copyout(&tmpstat, status, sizeof(int)); 980 } 981 982 return (error); 983} 984 985#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 986int 987linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 988{ 989 struct linux_wait4_args wait4_args; 990 991#ifdef DEBUG 992 if (ldebug(waitpid)) 993 printf(ARGS(waitpid, "%d, %p, %d"), 994 args->pid, (void *)args->status, args->options); 995#endif 996 997 wait4_args.pid = args->pid; 998 wait4_args.status = args->status; 999 wait4_args.options = args->options; 1000 wait4_args.rusage = NULL; 1001 1002 return (linux_wait4(td, &wait4_args)); 1003} 1004#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1005 1006int 1007linux_wait4(struct thread *td, struct linux_wait4_args *args) 1008{ 1009 int error, options; 1010 struct rusage ru, *rup; 1011 1012#ifdef DEBUG 1013 if (ldebug(wait4)) 1014 printf(ARGS(wait4, "%d, %p, %d, %p"), 1015 args->pid, (void *)args->status, args->options, 1016 (void *)args->rusage); 1017#endif 1018 if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG | 1019 LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL)) 1020 return (EINVAL); 1021 1022 options = WEXITED; 1023 linux_to_bsd_waitopts(args->options, &options); 1024 1025 if (args->rusage != NULL) 1026 rup = &ru; 1027 else 1028 rup = NULL; 1029 error = linux_common_wait(td, args->pid, args->status, options, rup); 1030 if (error != 0) 1031 return (error); 1032 if (args->rusage != NULL) 1033 error = linux_copyout_rusage(&ru, args->rusage); 1034 return (error); 1035} 1036 1037int 1038linux_waitid(struct thread *td, struct linux_waitid_args *args) 1039{ 1040 int status, options, sig; 1041 struct __wrusage wru; 1042 siginfo_t siginfo; 1043 l_siginfo_t lsi; 1044 idtype_t idtype; 1045 struct proc *p; 1046 int error; 1047 1048 options = 0; 1049 linux_to_bsd_waitopts(args->options, &options); 1050 1051 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 1052 return (EINVAL); 1053 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 1054 return (EINVAL); 1055 1056 switch (args->idtype) { 1057 case LINUX_P_ALL: 1058 idtype = P_ALL; 1059 break; 1060 case LINUX_P_PID: 1061 if (args->id <= 0) 1062 return (EINVAL); 1063 idtype = P_PID; 1064 break; 1065 case LINUX_P_PGID: 1066 if (args->id <= 0) 1067 return (EINVAL); 1068 idtype = P_PGID; 1069 break; 1070 default: 1071 return (EINVAL); 1072 } 1073 1074 error = kern_wait6(td, idtype, args->id, &status, options, 1075 &wru, &siginfo); 1076 if (error != 0) 1077 return (error); 1078 if (args->rusage != NULL) { 1079 error = linux_copyout_rusage(&wru.wru_children, 1080 args->rusage); 1081 if (error != 0) 1082 return (error); 1083 } 1084 if (args->info != NULL) { 1085 p = td->td_proc; 1086 if (td->td_retval[0] == 0) 1087 bzero(&lsi, sizeof(lsi)); 1088 else { 1089 sig = bsd_to_linux_signal(siginfo.si_signo); 1090 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 1091 } 1092 error = copyout(&lsi, args->info, sizeof(lsi)); 1093 } 1094 td->td_retval[0] = 0; 1095 1096 return (error); 1097} 1098 1099int 1100linux_mknod(struct thread *td, struct linux_mknod_args *args) 1101{ 1102 char *path; 1103 int error; 1104 1105 LCONVPATHCREAT(td, args->path, &path); 1106 1107#ifdef DEBUG 1108 if (ldebug(mknod)) 1109 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1110 (uintmax_t)args->dev); 1111#endif 1112 1113 switch (args->mode & S_IFMT) { 1114 case S_IFIFO: 1115 case S_IFSOCK: 1116 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 1117 break; 1118 1119 case S_IFCHR: 1120 case S_IFBLK: 1121 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 1122 args->dev); 1123 break; 1124 1125 case S_IFDIR: 1126 error = EPERM; 1127 break; 1128 1129 case 0: 1130 args->mode |= S_IFREG; 1131 /* FALLTHROUGH */ 1132 case S_IFREG: 1133 error = kern_open(td, path, UIO_SYSSPACE, 1134 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1135 if (error == 0) 1136 kern_close(td, td->td_retval[0]); 1137 break; 1138 1139 default: 1140 error = EINVAL; 1141 break; 1142 } 1143 LFREEPATH(path); 1144 return (error); 1145} 1146 1147int 1148linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1149{ 1150 char *path; 1151 int error, dfd; 1152 1153 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1154 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1155 1156#ifdef DEBUG 1157 if (ldebug(mknodat)) 1158 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1159#endif 1160 1161 switch (args->mode & S_IFMT) { 1162 case S_IFIFO: 1163 case S_IFSOCK: 1164 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1165 break; 1166 1167 case S_IFCHR: 1168 case S_IFBLK: 1169 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1170 args->dev); 1171 break; 1172 1173 case S_IFDIR: 1174 error = EPERM; 1175 break; 1176 1177 case 0: 1178 args->mode |= S_IFREG; 1179 /* FALLTHROUGH */ 1180 case S_IFREG: 1181 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1182 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1183 if (error == 0) 1184 kern_close(td, td->td_retval[0]); 1185 break; 1186 1187 default: 1188 error = EINVAL; 1189 break; 1190 } 1191 LFREEPATH(path); 1192 return (error); 1193} 1194 1195/* 1196 * UGH! This is just about the dumbest idea I've ever heard!! 1197 */ 1198int 1199linux_personality(struct thread *td, struct linux_personality_args *args) 1200{ 1201 struct linux_pemuldata *pem; 1202 struct proc *p = td->td_proc; 1203 uint32_t old; 1204 1205#ifdef DEBUG 1206 if (ldebug(personality)) 1207 printf(ARGS(personality, "%u"), args->per); 1208#endif 1209 1210 PROC_LOCK(p); 1211 pem = pem_find(p); 1212 old = pem->persona; 1213 if (args->per != 0xffffffff) 1214 pem->persona = args->per; 1215 PROC_UNLOCK(p); 1216 1217 td->td_retval[0] = old; 1218 return (0); 1219} 1220 1221struct l_itimerval { 1222 l_timeval it_interval; 1223 l_timeval it_value; 1224}; 1225 1226#define B2L_ITIMERVAL(bip, lip) \ 1227 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1228 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1229 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1230 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1231 1232int 1233linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1234{ 1235 int error; 1236 struct l_itimerval ls; 1237 struct itimerval aitv, oitv; 1238 1239#ifdef DEBUG 1240 if (ldebug(setitimer)) 1241 printf(ARGS(setitimer, "%p, %p"), 1242 (void *)uap->itv, (void *)uap->oitv); 1243#endif 1244 1245 if (uap->itv == NULL) { 1246 uap->itv = uap->oitv; 1247 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1248 } 1249 1250 error = copyin(uap->itv, &ls, sizeof(ls)); 1251 if (error != 0) 1252 return (error); 1253 B2L_ITIMERVAL(&aitv, &ls); 1254#ifdef DEBUG 1255 if (ldebug(setitimer)) { 1256 printf("setitimer: value: sec: %jd, usec: %ld\n", 1257 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1258 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1259 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1260 } 1261#endif 1262 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1263 if (error != 0 || uap->oitv == NULL) 1264 return (error); 1265 B2L_ITIMERVAL(&ls, &oitv); 1266 1267 return (copyout(&ls, uap->oitv, sizeof(ls))); 1268} 1269 1270int 1271linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1272{ 1273 int error; 1274 struct l_itimerval ls; 1275 struct itimerval aitv; 1276 1277#ifdef DEBUG 1278 if (ldebug(getitimer)) 1279 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1280#endif 1281 error = kern_getitimer(td, uap->which, &aitv); 1282 if (error != 0) 1283 return (error); 1284 B2L_ITIMERVAL(&ls, &aitv); 1285 return (copyout(&ls, uap->itv, sizeof(ls))); 1286} 1287 1288#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1289int 1290linux_nice(struct thread *td, struct linux_nice_args *args) 1291{ 1292 struct setpriority_args bsd_args; 1293 1294 bsd_args.which = PRIO_PROCESS; 1295 bsd_args.who = 0; /* current process */ 1296 bsd_args.prio = args->inc; 1297 return (sys_setpriority(td, &bsd_args)); 1298} 1299#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1300 1301int 1302linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1303{ 1304 struct ucred *newcred, *oldcred; 1305 l_gid_t *linux_gidset; 1306 gid_t *bsd_gidset; 1307 int ngrp, error; 1308 struct proc *p; 1309 1310 ngrp = args->gidsetsize; 1311 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1312 return (EINVAL); 1313 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1314 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1315 if (error) 1316 goto out; 1317 newcred = crget(); 1318 crextend(newcred, ngrp + 1); 1319 p = td->td_proc; 1320 PROC_LOCK(p); 1321 oldcred = p->p_ucred; 1322 crcopy(newcred, oldcred); 1323 1324 /* 1325 * cr_groups[0] holds egid. Setting the whole set from 1326 * the supplied set will cause egid to be changed too. 1327 * Keep cr_groups[0] unchanged to prevent that. 1328 */ 1329 1330 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1331 PROC_UNLOCK(p); 1332 crfree(newcred); 1333 goto out; 1334 } 1335 1336 if (ngrp > 0) { 1337 newcred->cr_ngroups = ngrp + 1; 1338 1339 bsd_gidset = newcred->cr_groups; 1340 ngrp--; 1341 while (ngrp >= 0) { 1342 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1343 ngrp--; 1344 } 1345 } else 1346 newcred->cr_ngroups = 1; 1347 1348 setsugid(p); 1349 proc_set_cred(p, newcred); 1350 PROC_UNLOCK(p); 1351 crfree(oldcred); 1352 error = 0; 1353out: 1354 free(linux_gidset, M_LINUX); 1355 return (error); 1356} 1357 1358int 1359linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1360{ 1361 struct ucred *cred; 1362 l_gid_t *linux_gidset; 1363 gid_t *bsd_gidset; 1364 int bsd_gidsetsz, ngrp, error; 1365 1366 cred = td->td_ucred; 1367 bsd_gidset = cred->cr_groups; 1368 bsd_gidsetsz = cred->cr_ngroups - 1; 1369 1370 /* 1371 * cr_groups[0] holds egid. Returning the whole set 1372 * here will cause a duplicate. Exclude cr_groups[0] 1373 * to prevent that. 1374 */ 1375 1376 if ((ngrp = args->gidsetsize) == 0) { 1377 td->td_retval[0] = bsd_gidsetsz; 1378 return (0); 1379 } 1380 1381 if (ngrp < bsd_gidsetsz) 1382 return (EINVAL); 1383 1384 ngrp = 0; 1385 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1386 M_LINUX, M_WAITOK); 1387 while (ngrp < bsd_gidsetsz) { 1388 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1389 ngrp++; 1390 } 1391 1392 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1393 free(linux_gidset, M_LINUX); 1394 if (error) 1395 return (error); 1396 1397 td->td_retval[0] = ngrp; 1398 return (0); 1399} 1400 1401int 1402linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1403{ 1404 struct rlimit bsd_rlim; 1405 struct l_rlimit rlim; 1406 u_int which; 1407 int error; 1408 1409#ifdef DEBUG 1410 if (ldebug(setrlimit)) 1411 printf(ARGS(setrlimit, "%d, %p"), 1412 args->resource, (void *)args->rlim); 1413#endif 1414 1415 if (args->resource >= LINUX_RLIM_NLIMITS) 1416 return (EINVAL); 1417 1418 which = linux_to_bsd_resource[args->resource]; 1419 if (which == -1) 1420 return (EINVAL); 1421 1422 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1423 if (error) 1424 return (error); 1425 1426 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1427 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1428 return (kern_setrlimit(td, which, &bsd_rlim)); 1429} 1430 1431#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1432int 1433linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1434{ 1435 struct l_rlimit rlim; 1436 struct proc *p = td->td_proc; 1437 struct rlimit bsd_rlim; 1438 u_int which; 1439 1440#ifdef DEBUG 1441 if (ldebug(old_getrlimit)) 1442 printf(ARGS(old_getrlimit, "%d, %p"), 1443 args->resource, (void *)args->rlim); 1444#endif 1445 1446 if (args->resource >= LINUX_RLIM_NLIMITS) 1447 return (EINVAL); 1448 1449 which = linux_to_bsd_resource[args->resource]; 1450 if (which == -1) 1451 return (EINVAL); 1452 1453 PROC_LOCK(p); 1454 lim_rlimit(p, which, &bsd_rlim); 1455 PROC_UNLOCK(p); 1456 1457#ifdef COMPAT_LINUX32 1458 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1459 if (rlim.rlim_cur == UINT_MAX) 1460 rlim.rlim_cur = INT_MAX; 1461 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1462 if (rlim.rlim_max == UINT_MAX) 1463 rlim.rlim_max = INT_MAX; 1464#else 1465 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1466 if (rlim.rlim_cur == ULONG_MAX) 1467 rlim.rlim_cur = LONG_MAX; 1468 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1469 if (rlim.rlim_max == ULONG_MAX) 1470 rlim.rlim_max = LONG_MAX; 1471#endif 1472 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1473} 1474#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1475 1476int 1477linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1478{ 1479 struct l_rlimit rlim; 1480 struct proc *p = td->td_proc; 1481 struct rlimit bsd_rlim; 1482 u_int which; 1483 1484#ifdef DEBUG 1485 if (ldebug(getrlimit)) 1486 printf(ARGS(getrlimit, "%d, %p"), 1487 args->resource, (void *)args->rlim); 1488#endif 1489 1490 if (args->resource >= LINUX_RLIM_NLIMITS) 1491 return (EINVAL); 1492 1493 which = linux_to_bsd_resource[args->resource]; 1494 if (which == -1) 1495 return (EINVAL); 1496 1497 PROC_LOCK(p); 1498 lim_rlimit(p, which, &bsd_rlim); 1499 PROC_UNLOCK(p); 1500 1501 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1502 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1503 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1504} 1505 1506int 1507linux_sched_setscheduler(struct thread *td, 1508 struct linux_sched_setscheduler_args *args) 1509{ 1510 struct sched_param sched_param; 1511 struct thread *tdt; 1512 int error, policy; 1513 1514#ifdef DEBUG 1515 if (ldebug(sched_setscheduler)) 1516 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1517 args->pid, args->policy, (const void *)args->param); 1518#endif 1519 1520 switch (args->policy) { 1521 case LINUX_SCHED_OTHER: 1522 policy = SCHED_OTHER; 1523 break; 1524 case LINUX_SCHED_FIFO: 1525 policy = SCHED_FIFO; 1526 break; 1527 case LINUX_SCHED_RR: 1528 policy = SCHED_RR; 1529 break; 1530 default: 1531 return (EINVAL); 1532 } 1533 1534 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1535 if (error) 1536 return (error); 1537 1538 tdt = linux_tdfind(td, args->pid, -1); 1539 if (tdt == NULL) 1540 return (ESRCH); 1541 1542 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1543 PROC_UNLOCK(tdt->td_proc); 1544 return (error); 1545} 1546 1547int 1548linux_sched_getscheduler(struct thread *td, 1549 struct linux_sched_getscheduler_args *args) 1550{ 1551 struct thread *tdt; 1552 int error, policy; 1553 1554#ifdef DEBUG 1555 if (ldebug(sched_getscheduler)) 1556 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1557#endif 1558 1559 tdt = linux_tdfind(td, args->pid, -1); 1560 if (tdt == NULL) 1561 return (ESRCH); 1562 1563 error = kern_sched_getscheduler(td, tdt, &policy); 1564 PROC_UNLOCK(tdt->td_proc); 1565 1566 switch (policy) { 1567 case SCHED_OTHER: 1568 td->td_retval[0] = LINUX_SCHED_OTHER; 1569 break; 1570 case SCHED_FIFO: 1571 td->td_retval[0] = LINUX_SCHED_FIFO; 1572 break; 1573 case SCHED_RR: 1574 td->td_retval[0] = LINUX_SCHED_RR; 1575 break; 1576 } 1577 return (error); 1578} 1579 1580int 1581linux_sched_get_priority_max(struct thread *td, 1582 struct linux_sched_get_priority_max_args *args) 1583{ 1584 struct sched_get_priority_max_args bsd; 1585 1586#ifdef DEBUG 1587 if (ldebug(sched_get_priority_max)) 1588 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1589#endif 1590 1591 switch (args->policy) { 1592 case LINUX_SCHED_OTHER: 1593 bsd.policy = SCHED_OTHER; 1594 break; 1595 case LINUX_SCHED_FIFO: 1596 bsd.policy = SCHED_FIFO; 1597 break; 1598 case LINUX_SCHED_RR: 1599 bsd.policy = SCHED_RR; 1600 break; 1601 default: 1602 return (EINVAL); 1603 } 1604 return (sys_sched_get_priority_max(td, &bsd)); 1605} 1606 1607int 1608linux_sched_get_priority_min(struct thread *td, 1609 struct linux_sched_get_priority_min_args *args) 1610{ 1611 struct sched_get_priority_min_args bsd; 1612 1613#ifdef DEBUG 1614 if (ldebug(sched_get_priority_min)) 1615 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1616#endif 1617 1618 switch (args->policy) { 1619 case LINUX_SCHED_OTHER: 1620 bsd.policy = SCHED_OTHER; 1621 break; 1622 case LINUX_SCHED_FIFO: 1623 bsd.policy = SCHED_FIFO; 1624 break; 1625 case LINUX_SCHED_RR: 1626 bsd.policy = SCHED_RR; 1627 break; 1628 default: 1629 return (EINVAL); 1630 } 1631 return (sys_sched_get_priority_min(td, &bsd)); 1632} 1633 1634#define REBOOT_CAD_ON 0x89abcdef 1635#define REBOOT_CAD_OFF 0 1636#define REBOOT_HALT 0xcdef0123 1637#define REBOOT_RESTART 0x01234567 1638#define REBOOT_RESTART2 0xA1B2C3D4 1639#define REBOOT_POWEROFF 0x4321FEDC 1640#define REBOOT_MAGIC1 0xfee1dead 1641#define REBOOT_MAGIC2 0x28121969 1642#define REBOOT_MAGIC2A 0x05121996 1643#define REBOOT_MAGIC2B 0x16041998 1644 1645int 1646linux_reboot(struct thread *td, struct linux_reboot_args *args) 1647{ 1648 struct reboot_args bsd_args; 1649 1650#ifdef DEBUG 1651 if (ldebug(reboot)) 1652 printf(ARGS(reboot, "0x%x"), args->cmd); 1653#endif 1654 1655 if (args->magic1 != REBOOT_MAGIC1) 1656 return (EINVAL); 1657 1658 switch (args->magic2) { 1659 case REBOOT_MAGIC2: 1660 case REBOOT_MAGIC2A: 1661 case REBOOT_MAGIC2B: 1662 break; 1663 default: 1664 return (EINVAL); 1665 } 1666 1667 switch (args->cmd) { 1668 case REBOOT_CAD_ON: 1669 case REBOOT_CAD_OFF: 1670 return (priv_check(td, PRIV_REBOOT)); 1671 case REBOOT_HALT: 1672 bsd_args.opt = RB_HALT; 1673 break; 1674 case REBOOT_RESTART: 1675 case REBOOT_RESTART2: 1676 bsd_args.opt = 0; 1677 break; 1678 case REBOOT_POWEROFF: 1679 bsd_args.opt = RB_POWEROFF; 1680 break; 1681 default: 1682 return (EINVAL); 1683 } 1684 return (sys_reboot(td, &bsd_args)); 1685} 1686 1687 1688/* 1689 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1690 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1691 * are assumed to be preserved. The following lightweight syscalls fixes 1692 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1693 * 1694 * linux_getpid() - MP SAFE 1695 * linux_getgid() - MP SAFE 1696 * linux_getuid() - MP SAFE 1697 */ 1698 1699int 1700linux_getpid(struct thread *td, struct linux_getpid_args *args) 1701{ 1702 1703#ifdef DEBUG 1704 if (ldebug(getpid)) 1705 printf(ARGS(getpid, "")); 1706#endif 1707 td->td_retval[0] = td->td_proc->p_pid; 1708 1709 return (0); 1710} 1711 1712int 1713linux_gettid(struct thread *td, struct linux_gettid_args *args) 1714{ 1715 struct linux_emuldata *em; 1716 1717#ifdef DEBUG 1718 if (ldebug(gettid)) 1719 printf(ARGS(gettid, "")); 1720#endif 1721 1722 em = em_find(td); 1723 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1724 1725 td->td_retval[0] = em->em_tid; 1726 1727 return (0); 1728} 1729 1730 1731int 1732linux_getppid(struct thread *td, struct linux_getppid_args *args) 1733{ 1734 1735#ifdef DEBUG 1736 if (ldebug(getppid)) 1737 printf(ARGS(getppid, "")); 1738#endif 1739 1740 PROC_LOCK(td->td_proc); 1741 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1742 PROC_UNLOCK(td->td_proc); 1743 return (0); 1744} 1745 1746int 1747linux_getgid(struct thread *td, struct linux_getgid_args *args) 1748{ 1749 1750#ifdef DEBUG 1751 if (ldebug(getgid)) 1752 printf(ARGS(getgid, "")); 1753#endif 1754 1755 td->td_retval[0] = td->td_ucred->cr_rgid; 1756 return (0); 1757} 1758 1759int 1760linux_getuid(struct thread *td, struct linux_getuid_args *args) 1761{ 1762 1763#ifdef DEBUG 1764 if (ldebug(getuid)) 1765 printf(ARGS(getuid, "")); 1766#endif 1767 1768 td->td_retval[0] = td->td_ucred->cr_ruid; 1769 return (0); 1770} 1771 1772 1773int 1774linux_getsid(struct thread *td, struct linux_getsid_args *args) 1775{ 1776 struct getsid_args bsd; 1777 1778#ifdef DEBUG 1779 if (ldebug(getsid)) 1780 printf(ARGS(getsid, "%i"), args->pid); 1781#endif 1782 1783 bsd.pid = args->pid; 1784 return (sys_getsid(td, &bsd)); 1785} 1786 1787int 1788linux_nosys(struct thread *td, struct nosys_args *ignore) 1789{ 1790 1791 return (ENOSYS); 1792} 1793 1794int 1795linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1796{ 1797 struct getpriority_args bsd_args; 1798 int error; 1799 1800#ifdef DEBUG 1801 if (ldebug(getpriority)) 1802 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1803#endif 1804 1805 bsd_args.which = args->which; 1806 bsd_args.who = args->who; 1807 error = sys_getpriority(td, &bsd_args); 1808 td->td_retval[0] = 20 - td->td_retval[0]; 1809 return (error); 1810} 1811 1812int 1813linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1814{ 1815 int name[2]; 1816 1817#ifdef DEBUG 1818 if (ldebug(sethostname)) 1819 printf(ARGS(sethostname, "*, %i"), args->len); 1820#endif 1821 1822 name[0] = CTL_KERN; 1823 name[1] = KERN_HOSTNAME; 1824 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1825 args->len, 0, 0)); 1826} 1827 1828int 1829linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1830{ 1831 int name[2]; 1832 1833#ifdef DEBUG 1834 if (ldebug(setdomainname)) 1835 printf(ARGS(setdomainname, "*, %i"), args->len); 1836#endif 1837 1838 name[0] = CTL_KERN; 1839 name[1] = KERN_NISDOMAINNAME; 1840 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1841 args->len, 0, 0)); 1842} 1843 1844int 1845linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1846{ 1847 1848#ifdef DEBUG 1849 if (ldebug(exit_group)) 1850 printf(ARGS(exit_group, "%i"), args->error_code); 1851#endif 1852 1853 LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid, 1854 args->error_code); 1855 1856 /* 1857 * XXX: we should send a signal to the parent if 1858 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1859 * as it doesnt occur often. 1860 */ 1861 exit1(td, W_EXITCODE(args->error_code, 0)); 1862 /* NOTREACHED */ 1863} 1864 1865#define _LINUX_CAPABILITY_VERSION 0x19980330 1866 1867struct l_user_cap_header { 1868 l_int version; 1869 l_int pid; 1870}; 1871 1872struct l_user_cap_data { 1873 l_int effective; 1874 l_int permitted; 1875 l_int inheritable; 1876}; 1877 1878int 1879linux_capget(struct thread *td, struct linux_capget_args *args) 1880{ 1881 struct l_user_cap_header luch; 1882 struct l_user_cap_data lucd; 1883 int error; 1884 1885 if (args->hdrp == NULL) 1886 return (EFAULT); 1887 1888 error = copyin(args->hdrp, &luch, sizeof(luch)); 1889 if (error != 0) 1890 return (error); 1891 1892 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1893 luch.version = _LINUX_CAPABILITY_VERSION; 1894 error = copyout(&luch, args->hdrp, sizeof(luch)); 1895 if (error) 1896 return (error); 1897 return (EINVAL); 1898 } 1899 1900 if (luch.pid) 1901 return (EPERM); 1902 1903 if (args->datap) { 1904 /* 1905 * The current implementation doesn't support setting 1906 * a capability (it's essentially a stub) so indicate 1907 * that no capabilities are currently set or available 1908 * to request. 1909 */ 1910 bzero (&lucd, sizeof(lucd)); 1911 error = copyout(&lucd, args->datap, sizeof(lucd)); 1912 } 1913 1914 return (error); 1915} 1916 1917int 1918linux_capset(struct thread *td, struct linux_capset_args *args) 1919{ 1920 struct l_user_cap_header luch; 1921 struct l_user_cap_data lucd; 1922 int error; 1923 1924 if (args->hdrp == NULL || args->datap == NULL) 1925 return (EFAULT); 1926 1927 error = copyin(args->hdrp, &luch, sizeof(luch)); 1928 if (error != 0) 1929 return (error); 1930 1931 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1932 luch.version = _LINUX_CAPABILITY_VERSION; 1933 error = copyout(&luch, args->hdrp, sizeof(luch)); 1934 if (error) 1935 return (error); 1936 return (EINVAL); 1937 } 1938 1939 if (luch.pid) 1940 return (EPERM); 1941 1942 error = copyin(args->datap, &lucd, sizeof(lucd)); 1943 if (error != 0) 1944 return (error); 1945 1946 /* We currently don't support setting any capabilities. */ 1947 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1948 linux_msg(td, 1949 "capset effective=0x%x, permitted=0x%x, " 1950 "inheritable=0x%x is not implemented", 1951 (int)lucd.effective, (int)lucd.permitted, 1952 (int)lucd.inheritable); 1953 return (EPERM); 1954 } 1955 1956 return (0); 1957} 1958 1959int 1960linux_prctl(struct thread *td, struct linux_prctl_args *args) 1961{ 1962 int error = 0, max_size; 1963 struct proc *p = td->td_proc; 1964 char comm[LINUX_MAX_COMM_LEN]; 1965 struct linux_emuldata *em; 1966 int pdeath_signal; 1967 1968#ifdef DEBUG 1969 if (ldebug(prctl)) 1970 printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option, 1971 (uintmax_t)args->arg2, (uintmax_t)args->arg3, 1972 (uintmax_t)args->arg4, (uintmax_t)args->arg5); 1973#endif 1974 1975 switch (args->option) { 1976 case LINUX_PR_SET_PDEATHSIG: 1977 if (!LINUX_SIG_VALID(args->arg2)) 1978 return (EINVAL); 1979 em = em_find(td); 1980 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1981 em->pdeath_signal = args->arg2; 1982 break; 1983 case LINUX_PR_GET_PDEATHSIG: 1984 em = em_find(td); 1985 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1986 pdeath_signal = em->pdeath_signal; 1987 error = copyout(&pdeath_signal, 1988 (void *)(register_t)args->arg2, 1989 sizeof(pdeath_signal)); 1990 break; 1991 case LINUX_PR_GET_KEEPCAPS: 1992 /* 1993 * Indicate that we always clear the effective and 1994 * permitted capability sets when the user id becomes 1995 * non-zero (actually the capability sets are simply 1996 * always zero in the current implementation). 1997 */ 1998 td->td_retval[0] = 0; 1999 break; 2000 case LINUX_PR_SET_KEEPCAPS: 2001 /* 2002 * Ignore requests to keep the effective and permitted 2003 * capability sets when the user id becomes non-zero. 2004 */ 2005 break; 2006 case LINUX_PR_SET_NAME: 2007 /* 2008 * To be on the safe side we need to make sure to not 2009 * overflow the size a linux program expects. We already 2010 * do this here in the copyin, so that we don't need to 2011 * check on copyout. 2012 */ 2013 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 2014 error = copyinstr((void *)(register_t)args->arg2, comm, 2015 max_size, NULL); 2016 2017 /* Linux silently truncates the name if it is too long. */ 2018 if (error == ENAMETOOLONG) { 2019 /* 2020 * XXX: copyinstr() isn't documented to populate the 2021 * array completely, so do a copyin() to be on the 2022 * safe side. This should be changed in case 2023 * copyinstr() is changed to guarantee this. 2024 */ 2025 error = copyin((void *)(register_t)args->arg2, comm, 2026 max_size - 1); 2027 comm[max_size - 1] = '\0'; 2028 } 2029 if (error) 2030 return (error); 2031 2032 PROC_LOCK(p); 2033 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 2034 PROC_UNLOCK(p); 2035 break; 2036 case LINUX_PR_GET_NAME: 2037 PROC_LOCK(p); 2038 strlcpy(comm, p->p_comm, sizeof(comm)); 2039 PROC_UNLOCK(p); 2040 error = copyout(comm, (void *)(register_t)args->arg2, 2041 strlen(comm) + 1); 2042 break; 2043 default: 2044 error = EINVAL; 2045 break; 2046 } 2047 2048 return (error); 2049} 2050 2051int 2052linux_sched_setparam(struct thread *td, 2053 struct linux_sched_setparam_args *uap) 2054{ 2055 struct sched_param sched_param; 2056 struct thread *tdt; 2057 int error; 2058 2059#ifdef DEBUG 2060 if (ldebug(sched_setparam)) 2061 printf(ARGS(sched_setparam, "%d, *"), uap->pid); 2062#endif 2063 2064 error = copyin(uap->param, &sched_param, sizeof(sched_param)); 2065 if (error) 2066 return (error); 2067 2068 tdt = linux_tdfind(td, uap->pid, -1); 2069 if (tdt == NULL) 2070 return (ESRCH); 2071 2072 error = kern_sched_setparam(td, tdt, &sched_param); 2073 PROC_UNLOCK(tdt->td_proc); 2074 return (error); 2075} 2076 2077int 2078linux_sched_getparam(struct thread *td, 2079 struct linux_sched_getparam_args *uap) 2080{ 2081 struct sched_param sched_param; 2082 struct thread *tdt; 2083 int error; 2084 2085#ifdef DEBUG 2086 if (ldebug(sched_getparam)) 2087 printf(ARGS(sched_getparam, "%d, *"), uap->pid); 2088#endif 2089 2090 tdt = linux_tdfind(td, uap->pid, -1); 2091 if (tdt == NULL) 2092 return (ESRCH); 2093 2094 error = kern_sched_getparam(td, tdt, &sched_param); 2095 PROC_UNLOCK(tdt->td_proc); 2096 if (error == 0) 2097 error = copyout(&sched_param, uap->param, 2098 sizeof(sched_param)); 2099 return (error); 2100} 2101 2102/* 2103 * Get affinity of a process. 2104 */ 2105int 2106linux_sched_getaffinity(struct thread *td, 2107 struct linux_sched_getaffinity_args *args) 2108{ 2109 int error; 2110 struct thread *tdt; 2111 struct cpuset_getaffinity_args cga; 2112 2113#ifdef DEBUG 2114 if (ldebug(sched_getaffinity)) 2115 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2116 args->len); 2117#endif 2118 if (args->len < sizeof(cpuset_t)) 2119 return (EINVAL); 2120 2121 tdt = linux_tdfind(td, args->pid, -1); 2122 if (tdt == NULL) 2123 return (ESRCH); 2124 2125 PROC_UNLOCK(tdt->td_proc); 2126 cga.level = CPU_LEVEL_WHICH; 2127 cga.which = CPU_WHICH_TID; 2128 cga.id = tdt->td_tid; 2129 cga.cpusetsize = sizeof(cpuset_t); 2130 cga.mask = (cpuset_t *) args->user_mask_ptr; 2131 2132 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 2133 td->td_retval[0] = sizeof(cpuset_t); 2134 2135 return (error); 2136} 2137 2138/* 2139 * Set affinity of a process. 2140 */ 2141int 2142linux_sched_setaffinity(struct thread *td, 2143 struct linux_sched_setaffinity_args *args) 2144{ 2145 struct cpuset_setaffinity_args csa; 2146 struct thread *tdt; 2147 2148#ifdef DEBUG 2149 if (ldebug(sched_setaffinity)) 2150 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2151 args->len); 2152#endif 2153 if (args->len < sizeof(cpuset_t)) 2154 return (EINVAL); 2155 2156 tdt = linux_tdfind(td, args->pid, -1); 2157 if (tdt == NULL) 2158 return (ESRCH); 2159 2160 PROC_UNLOCK(tdt->td_proc); 2161 csa.level = CPU_LEVEL_WHICH; 2162 csa.which = CPU_WHICH_TID; 2163 csa.id = tdt->td_tid; 2164 csa.cpusetsize = sizeof(cpuset_t); 2165 csa.mask = (cpuset_t *) args->user_mask_ptr; 2166 2167 return (sys_cpuset_setaffinity(td, &csa)); 2168} 2169 2170struct linux_rlimit64 { 2171 uint64_t rlim_cur; 2172 uint64_t rlim_max; 2173}; 2174 2175int 2176linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2177{ 2178 struct rlimit rlim, nrlim; 2179 struct linux_rlimit64 lrlim; 2180 struct proc *p; 2181 u_int which; 2182 int flags; 2183 int error; 2184 2185#ifdef DEBUG 2186 if (ldebug(prlimit64)) 2187 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2188 args->resource, (void *)args->new, (void *)args->old); 2189#endif 2190 2191 if (args->resource >= LINUX_RLIM_NLIMITS) 2192 return (EINVAL); 2193 2194 which = linux_to_bsd_resource[args->resource]; 2195 if (which == -1) 2196 return (EINVAL); 2197 2198 if (args->new != NULL) { 2199 /* 2200 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2201 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2202 * as INFINITY so we do not need a conversion even. 2203 */ 2204 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2205 if (error != 0) 2206 return (error); 2207 } 2208 2209 flags = PGET_HOLD | PGET_NOTWEXIT; 2210 if (args->new != NULL) 2211 flags |= PGET_CANDEBUG; 2212 else 2213 flags |= PGET_CANSEE; 2214 error = pget(args->pid, flags, &p); 2215 if (error != 0) 2216 return (error); 2217 2218 if (args->old != NULL) { 2219 PROC_LOCK(p); 2220 lim_rlimit(p, which, &rlim); 2221 PROC_UNLOCK(p); 2222 if (rlim.rlim_cur == RLIM_INFINITY) 2223 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2224 else 2225 lrlim.rlim_cur = rlim.rlim_cur; 2226 if (rlim.rlim_max == RLIM_INFINITY) 2227 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2228 else 2229 lrlim.rlim_max = rlim.rlim_max; 2230 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2231 if (error != 0) 2232 goto out; 2233 } 2234 2235 if (args->new != NULL) 2236 error = kern_proc_setrlimit(td, p, which, &nrlim); 2237 2238 out: 2239 PRELE(p); 2240 return (error); 2241} 2242 2243int 2244linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2245{ 2246 struct timeval utv, tv0, tv1, *tvp; 2247 struct l_pselect6arg lpse6; 2248 struct l_timespec lts; 2249 struct timespec uts; 2250 l_sigset_t l_ss; 2251 sigset_t *ssp; 2252 sigset_t ss; 2253 int error; 2254 2255 ssp = NULL; 2256 if (args->sig != NULL) { 2257 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2258 if (error != 0) 2259 return (error); 2260 if (lpse6.ss_len != sizeof(l_ss)) 2261 return (EINVAL); 2262 if (lpse6.ss != 0) { 2263 error = copyin(PTRIN(lpse6.ss), &l_ss, 2264 sizeof(l_ss)); 2265 if (error != 0) 2266 return (error); 2267 linux_to_bsd_sigset(&l_ss, &ss); 2268 ssp = &ss; 2269 } 2270 } 2271 2272 /* 2273 * Currently glibc changes nanosecond number to microsecond. 2274 * This mean losing precision but for now it is hardly seen. 2275 */ 2276 if (args->tsp != NULL) { 2277 error = copyin(args->tsp, <s, sizeof(lts)); 2278 if (error != 0) 2279 return (error); 2280 error = linux_to_native_timespec(&uts, <s); 2281 if (error != 0) 2282 return (error); 2283 2284 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2285 if (itimerfix(&utv)) 2286 return (EINVAL); 2287 2288 microtime(&tv0); 2289 tvp = &utv; 2290 } else 2291 tvp = NULL; 2292 2293 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2294 args->exceptfds, tvp, ssp, LINUX_NFDBITS); 2295 2296 if (error == 0 && args->tsp != NULL) { 2297 if (td->td_retval[0] != 0) { 2298 /* 2299 * Compute how much time was left of the timeout, 2300 * by subtracting the current time and the time 2301 * before we started the call, and subtracting 2302 * that result from the user-supplied value. 2303 */ 2304 2305 microtime(&tv1); 2306 timevalsub(&tv1, &tv0); 2307 timevalsub(&utv, &tv1); 2308 if (utv.tv_sec < 0) 2309 timevalclear(&utv); 2310 } else 2311 timevalclear(&utv); 2312 2313 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2314 2315 native_to_linux_timespec(<s, &uts); 2316 error = copyout(<s, args->tsp, sizeof(lts)); 2317 } 2318 2319 return (error); 2320} 2321 2322int 2323linux_ppoll(struct thread *td, struct linux_ppoll_args *args) 2324{ 2325 struct timespec ts0, ts1; 2326 struct l_timespec lts; 2327 struct timespec uts, *tsp; 2328 l_sigset_t l_ss; 2329 sigset_t *ssp; 2330 sigset_t ss; 2331 int error; 2332 2333 if (args->sset != NULL) { 2334 if (args->ssize != sizeof(l_ss)) 2335 return (EINVAL); 2336 error = copyin(args->sset, &l_ss, sizeof(l_ss)); 2337 if (error) 2338 return (error); 2339 linux_to_bsd_sigset(&l_ss, &ss); 2340 ssp = &ss; 2341 } else 2342 ssp = NULL; 2343 if (args->tsp != NULL) { 2344 error = copyin(args->tsp, <s, sizeof(lts)); 2345 if (error) 2346 return (error); 2347 error = linux_to_native_timespec(&uts, <s); 2348 if (error != 0) 2349 return (error); 2350 2351 nanotime(&ts0); 2352 tsp = &uts; 2353 } else 2354 tsp = NULL; 2355 2356 error = kern_poll(td, args->fds, args->nfds, tsp, ssp); 2357 2358 if (error == 0 && args->tsp != NULL) { 2359 if (td->td_retval[0]) { 2360 nanotime(&ts1); 2361 timespecsub(&ts1, &ts0); 2362 timespecsub(&uts, &ts1); 2363 if (uts.tv_sec < 0) 2364 timespecclear(&uts); 2365 } else 2366 timespecclear(&uts); 2367 2368 native_to_linux_timespec(<s, &uts); 2369 error = copyout(<s, args->tsp, sizeof(lts)); 2370 } 2371 2372 return (error); 2373} 2374 2375#if defined(DEBUG) || defined(KTR) 2376/* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2377 2378#ifdef COMPAT_LINUX32 2379#define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL 2380#else 2381#define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL 2382#endif 2383 2384u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))]; 2385 2386static int 2387linux_debug(int syscall, int toggle, int global) 2388{ 2389 2390 if (global) { 2391 char c = toggle ? 0 : 0xff; 2392 2393 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2394 return (0); 2395 } 2396 if (syscall < 0 || syscall >= L_MAXSYSCALL) 2397 return (EINVAL); 2398 if (toggle) 2399 clrbit(linux_debug_map, syscall); 2400 else 2401 setbit(linux_debug_map, syscall); 2402 return (0); 2403} 2404#undef L_MAXSYSCALL 2405 2406/* 2407 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2408 * 2409 * E.g.: sysctl linux.debug=21.0 2410 * 2411 * As a special case, syscall "all" will apply to all syscalls globally. 2412 */ 2413#define LINUX_MAX_DEBUGSTR 16 2414int 2415linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2416{ 2417 char value[LINUX_MAX_DEBUGSTR], *p; 2418 int error, sysc, toggle; 2419 int global = 0; 2420 2421 value[0] = '\0'; 2422 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2423 if (error || req->newptr == NULL) 2424 return (error); 2425 for (p = value; *p != '\0' && *p != '.'; p++); 2426 if (*p == '\0') 2427 return (EINVAL); 2428 *p++ = '\0'; 2429 sysc = strtol(value, NULL, 0); 2430 toggle = strtol(p, NULL, 0); 2431 if (strcmp(value, "all") == 0) 2432 global = 1; 2433 error = linux_debug(sysc, toggle, global); 2434 return (error); 2435} 2436 2437#endif /* DEBUG || KTR */ 2438 2439int 2440linux_sched_rr_get_interval(struct thread *td, 2441 struct linux_sched_rr_get_interval_args *uap) 2442{ 2443 struct timespec ts; 2444 struct l_timespec lts; 2445 struct thread *tdt; 2446 int error; 2447 2448 /* 2449 * According to man in case the invalid pid specified 2450 * EINVAL should be returned. 2451 */ 2452 if (uap->pid < 0) 2453 return (EINVAL); 2454 2455 tdt = linux_tdfind(td, uap->pid, -1); 2456 if (tdt == NULL) 2457 return (ESRCH); 2458 2459 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2460 PROC_UNLOCK(tdt->td_proc); 2461 if (error != 0) 2462 return (error); 2463 native_to_linux_timespec(<s, &ts); 2464 return (copyout(<s, uap->interval, sizeof(lts))); 2465} 2466 2467/* 2468 * In case when the Linux thread is the initial thread in 2469 * the thread group thread id is equal to the process id. 2470 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2471 */ 2472struct thread * 2473linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2474{ 2475 struct linux_emuldata *em; 2476 struct thread *tdt; 2477 struct proc *p; 2478 2479 tdt = NULL; 2480 if (tid == 0 || tid == td->td_tid) { 2481 tdt = td; 2482 PROC_LOCK(tdt->td_proc); 2483 } else if (tid > PID_MAX) 2484 tdt = tdfind(tid, pid); 2485 else { 2486 /* 2487 * Initial thread where the tid equal to the pid. 2488 */ 2489 p = pfind(tid); 2490 if (p != NULL) { 2491 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2492 /* 2493 * p is not a Linuxulator process. 2494 */ 2495 PROC_UNLOCK(p); 2496 return (NULL); 2497 } 2498 FOREACH_THREAD_IN_PROC(p, tdt) { 2499 em = em_find(tdt); 2500 if (tid == em->em_tid) 2501 return (tdt); 2502 } 2503 PROC_UNLOCK(p); 2504 } 2505 return (NULL); 2506 } 2507 2508 return (tdt); 2509} 2510 2511void 2512linux_to_bsd_waitopts(int options, int *bsdopts) 2513{ 2514 2515 if (options & LINUX_WNOHANG) 2516 *bsdopts |= WNOHANG; 2517 if (options & LINUX_WUNTRACED) 2518 *bsdopts |= WUNTRACED; 2519 if (options & LINUX_WEXITED) 2520 *bsdopts |= WEXITED; 2521 if (options & LINUX_WCONTINUED) 2522 *bsdopts |= WCONTINUED; 2523 if (options & LINUX_WNOWAIT) 2524 *bsdopts |= WNOWAIT; 2525 2526 if (options & __WCLONE) 2527 *bsdopts |= WLINUXCLONE; 2528} 2529