1 /*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 1994-1995 Søren Schmidt 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer 11 * in this position and unchanged. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_compat.h" 34 35 #include <sys/param.h> 36 #include <sys/blist.h> 37 #include <sys/fcntl.h> 38 #if defined(__i386__) 39 #include <sys/imgact_aout.h> 40 #endif 41 #include <sys/jail.h> 42 #include <sys/kernel.h> 43 #include <sys/limits.h> 44 #include <sys/lock.h> 45 #include <sys/malloc.h> 46 #include <sys/mman.h> 47 #include <sys/mount.h> 48 #include <sys/mutex.h> 49 #include <sys/namei.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/reboot.h> 53 #include <sys/racct.h> 54 #include <sys/resourcevar.h> 55 #include <sys/sched.h> 56 #include <sys/sdt.h> 57 #include <sys/signalvar.h> 58 #include <sys/stat.h> 59 #include <sys/syscallsubr.h> 60 #include <sys/sysctl.h> 61 #include <sys/sysproto.h> 62 #include <sys/systm.h> 63 #include <sys/time.h> 64 #include <sys/vmmeter.h> 65 #include <sys/vnode.h> 66 #include <sys/wait.h> 67 #include <sys/cpuset.h> 68 69 #include <security/mac/mac_framework.h> 70 71 #include <vm/vm.h> 72 #include <vm/pmap.h> 73 #include <vm/vm_kern.h> 74 #include <vm/vm_map.h> 75 #include <vm/vm_extern.h> 76 #include <vm/vm_object.h> 77 #include <vm/swap_pager.h> 78 79 #ifdef COMPAT_LINUX32 80 #include <machine/../linux32/linux.h> 81 #include <machine/../linux32/linux32_proto.h> 82 #else 83 #include <machine/../linux/linux.h> 84 #include <machine/../linux/linux_proto.h> 85 #endif 86 87 #include <compat/linux/linux_dtrace.h> 88 #include <compat/linux/linux_file.h> 89 #include <compat/linux/linux_mib.h> 90 #include <compat/linux/linux_signal.h> 91 #include <compat/linux/linux_timer.h> 92 #include <compat/linux/linux_util.h> 93 #include <compat/linux/linux_sysproto.h> 94 #include <compat/linux/linux_emul.h> 95 #include <compat/linux/linux_misc.h> 96 97 /** 98 * Special DTrace provider for the linuxulator. 99 * 100 * In this file we define the provider for the entire linuxulator. All 101 * modules (= files of the linuxulator) use it. 102 * 103 * We define a different name depending on the emulated bitsize, see 104 * ../../<ARCH>/linux{,32}/linux.h, e.g.: 105 * native bitsize = linuxulator 106 * amd64, 32bit emulation = linuxulator32 107 */ 108 LIN_SDT_PROVIDER_DEFINE(LINUX_DTRACE); 109 110 int stclohz; /* Statistics clock frequency */ 111 112 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 113 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 114 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 115 RLIMIT_MEMLOCK, RLIMIT_AS 116 }; 117 118 struct l_sysinfo { 119 l_long uptime; /* Seconds since boot */ 120 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 121 #define LINUX_SYSINFO_LOADS_SCALE 65536 122 l_ulong totalram; /* Total usable main memory size */ 123 l_ulong freeram; /* Available memory size */ 124 l_ulong sharedram; /* Amount of shared memory */ 125 l_ulong bufferram; /* Memory used by buffers */ 126 l_ulong totalswap; /* Total swap space size */ 127 l_ulong freeswap; /* swap space still available */ 128 l_ushort procs; /* Number of current processes */ 129 l_ushort pads; 130 l_ulong totalbig; 131 l_ulong freebig; 132 l_uint mem_unit; 133 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 134 }; 135 136 struct l_pselect6arg { 137 l_uintptr_t ss; 138 l_size_t ss_len; 139 }; 140 141 static int linux_utimensat_nsec_valid(l_long); 142 143 144 int 145 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 146 { 147 struct l_sysinfo sysinfo; 148 vm_object_t object; 149 int i, j; 150 struct timespec ts; 151 152 bzero(&sysinfo, sizeof(sysinfo)); 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 - vm_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 } 189 190 int 191 linux_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 secs = args->secs; 202 /* 203 * Linux alarm() is always successful. Limit secs to INT32_MAX / 2 204 * to match kern_setitimer()'s limit to avoid error from it. 205 * 206 * XXX. Linux limit secs to INT_MAX on 32 and does not limit on 64-bit 207 * platforms. 208 */ 209 if (secs > INT32_MAX / 2) 210 secs = INT32_MAX / 2; 211 212 it.it_value.tv_sec = secs; 213 it.it_value.tv_usec = 0; 214 timevalclear(&it.it_interval); 215 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 216 KASSERT(error == 0, ("kern_setitimer returns %d", error)); 217 218 if ((old_it.it_value.tv_sec == 0 && old_it.it_value.tv_usec > 0) || 219 old_it.it_value.tv_usec >= 500000) 220 old_it.it_value.tv_sec++; 221 td->td_retval[0] = old_it.it_value.tv_sec; 222 return (0); 223 } 224 225 int 226 linux_brk(struct thread *td, struct linux_brk_args *args) 227 { 228 struct vmspace *vm = td->td_proc->p_vmspace; 229 vm_offset_t new, old; 230 struct obreak_args /* { 231 char * nsize; 232 } */ tmp; 233 234 #ifdef DEBUG 235 if (ldebug(brk)) 236 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 237 #endif 238 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 239 new = (vm_offset_t)args->dsend; 240 tmp.nsize = (char *)new; 241 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 242 td->td_retval[0] = (long)new; 243 else 244 td->td_retval[0] = (long)old; 245 246 return (0); 247 } 248 249 #if defined(__i386__) 250 /* XXX: what about amd64/linux32? */ 251 252 int 253 linux_uselib(struct thread *td, struct linux_uselib_args *args) 254 { 255 struct nameidata ni; 256 struct vnode *vp; 257 struct exec *a_out; 258 struct vattr attr; 259 vm_offset_t vmaddr; 260 unsigned long file_offset; 261 unsigned long bss_size; 262 char *library; 263 ssize_t aresid; 264 int error, locked, writecount; 265 266 LCONVPATHEXIST(td, args->library, &library); 267 268 #ifdef DEBUG 269 if (ldebug(uselib)) 270 printf(ARGS(uselib, "%s"), library); 271 #endif 272 273 a_out = NULL; 274 locked = 0; 275 vp = NULL; 276 277 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1, 278 UIO_SYSSPACE, library, td); 279 error = namei(&ni); 280 LFREEPATH(library); 281 if (error) 282 goto cleanup; 283 284 vp = ni.ni_vp; 285 NDFREE(&ni, NDF_ONLY_PNBUF); 286 287 /* 288 * From here on down, we have a locked vnode that must be unlocked. 289 * XXX: The code below largely duplicates exec_check_permissions(). 290 */ 291 locked = 1; 292 293 /* Writable? */ 294 error = VOP_GET_WRITECOUNT(vp, &writecount); 295 if (error != 0) 296 goto cleanup; 297 if (writecount != 0) { 298 error = ETXTBSY; 299 goto cleanup; 300 } 301 302 /* Executable? */ 303 error = VOP_GETATTR(vp, &attr, td->td_ucred); 304 if (error) 305 goto cleanup; 306 307 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 308 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 309 /* EACCESS is what exec(2) returns. */ 310 error = ENOEXEC; 311 goto cleanup; 312 } 313 314 /* Sensible size? */ 315 if (attr.va_size == 0) { 316 error = ENOEXEC; 317 goto cleanup; 318 } 319 320 /* Can we access it? */ 321 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 322 if (error) 323 goto cleanup; 324 325 /* 326 * XXX: This should use vn_open() so that it is properly authorized, 327 * and to reduce code redundancy all over the place here. 328 * XXX: Not really, it duplicates far more of exec_check_permissions() 329 * than vn_open(). 330 */ 331 #ifdef MAC 332 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 333 if (error) 334 goto cleanup; 335 #endif 336 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 337 if (error) 338 goto cleanup; 339 340 /* Pull in executable header into exec_map */ 341 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 342 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 343 if (error) 344 goto cleanup; 345 346 /* Is it a Linux binary ? */ 347 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 348 error = ENOEXEC; 349 goto cleanup; 350 } 351 352 /* 353 * While we are here, we should REALLY do some more checks 354 */ 355 356 /* Set file/virtual offset based on a.out variant. */ 357 switch ((int)(a_out->a_magic & 0xffff)) { 358 case 0413: /* ZMAGIC */ 359 file_offset = 1024; 360 break; 361 case 0314: /* QMAGIC */ 362 file_offset = 0; 363 break; 364 default: 365 error = ENOEXEC; 366 goto cleanup; 367 } 368 369 bss_size = round_page(a_out->a_bss); 370 371 /* Check various fields in header for validity/bounds. */ 372 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 373 error = ENOEXEC; 374 goto cleanup; 375 } 376 377 /* text + data can't exceed file size */ 378 if (a_out->a_data + a_out->a_text > attr.va_size) { 379 error = EFAULT; 380 goto cleanup; 381 } 382 383 /* 384 * text/data/bss must not exceed limits 385 * XXX - this is not complete. it should check current usage PLUS 386 * the resources needed by this library. 387 */ 388 PROC_LOCK(td->td_proc); 389 if (a_out->a_text > maxtsiz || 390 a_out->a_data + bss_size > lim_cur_proc(td->td_proc, RLIMIT_DATA) || 391 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 392 bss_size) != 0) { 393 PROC_UNLOCK(td->td_proc); 394 error = ENOMEM; 395 goto cleanup; 396 } 397 PROC_UNLOCK(td->td_proc); 398 399 /* 400 * Prevent more writers. 401 * XXX: Note that if any of the VM operations fail below we don't 402 * clear this flag. 403 */ 404 VOP_SET_TEXT(vp); 405 406 /* 407 * Lock no longer needed 408 */ 409 locked = 0; 410 VOP_UNLOCK(vp, 0); 411 412 /* 413 * Check if file_offset page aligned. Currently we cannot handle 414 * misalinged file offsets, and so we read in the entire image 415 * (what a waste). 416 */ 417 if (file_offset & PAGE_MASK) { 418 #ifdef DEBUG 419 printf("uselib: Non page aligned binary %lu\n", file_offset); 420 #endif 421 /* Map text+data read/write/execute */ 422 423 /* a_entry is the load address and is page aligned */ 424 vmaddr = trunc_page(a_out->a_entry); 425 426 /* get anon user mapping, read+write+execute */ 427 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 428 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE, 429 VM_PROT_ALL, VM_PROT_ALL, 0); 430 if (error) 431 goto cleanup; 432 433 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 434 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 435 td->td_ucred, NOCRED, &aresid, td); 436 if (error != 0) 437 goto cleanup; 438 if (aresid != 0) { 439 error = ENOEXEC; 440 goto cleanup; 441 } 442 } else { 443 #ifdef DEBUG 444 printf("uselib: Page aligned binary %lu\n", file_offset); 445 #endif 446 /* 447 * for QMAGIC, a_entry is 20 bytes beyond the load address 448 * to skip the executable header 449 */ 450 vmaddr = trunc_page(a_out->a_entry); 451 452 /* 453 * Map it all into the process's space as a single 454 * copy-on-write "data" segment. 455 */ 456 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 457 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 458 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 459 if (error) 460 goto cleanup; 461 } 462 #ifdef DEBUG 463 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 464 ((long *)vmaddr)[1]); 465 #endif 466 if (bss_size != 0) { 467 /* Calculate BSS start address */ 468 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 469 a_out->a_data; 470 471 /* allocate some 'anon' space */ 472 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 473 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, 474 VM_PROT_ALL, 0); 475 if (error) 476 goto cleanup; 477 } 478 479 cleanup: 480 /* Unlock vnode if needed */ 481 if (locked) 482 VOP_UNLOCK(vp, 0); 483 484 /* Release the temporary mapping. */ 485 if (a_out) 486 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 487 488 return (error); 489 } 490 491 #endif /* __i386__ */ 492 493 int 494 linux_select(struct thread *td, struct linux_select_args *args) 495 { 496 l_timeval ltv; 497 struct timeval tv0, tv1, utv, *tvp; 498 int error; 499 500 #ifdef DEBUG 501 if (ldebug(select)) 502 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 503 (void *)args->readfds, (void *)args->writefds, 504 (void *)args->exceptfds, (void *)args->timeout); 505 #endif 506 507 /* 508 * Store current time for computation of the amount of 509 * time left. 510 */ 511 if (args->timeout) { 512 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 513 goto select_out; 514 utv.tv_sec = ltv.tv_sec; 515 utv.tv_usec = ltv.tv_usec; 516 #ifdef DEBUG 517 if (ldebug(select)) 518 printf(LMSG("incoming timeout (%jd/%ld)"), 519 (intmax_t)utv.tv_sec, utv.tv_usec); 520 #endif 521 522 if (itimerfix(&utv)) { 523 /* 524 * The timeval was invalid. Convert it to something 525 * valid that will act as it does under Linux. 526 */ 527 utv.tv_sec += utv.tv_usec / 1000000; 528 utv.tv_usec %= 1000000; 529 if (utv.tv_usec < 0) { 530 utv.tv_sec -= 1; 531 utv.tv_usec += 1000000; 532 } 533 if (utv.tv_sec < 0) 534 timevalclear(&utv); 535 } 536 microtime(&tv0); 537 tvp = &utv; 538 } else 539 tvp = NULL; 540 541 error = kern_select(td, args->nfds, args->readfds, args->writefds, 542 args->exceptfds, tvp, LINUX_NFDBITS); 543 544 #ifdef DEBUG 545 if (ldebug(select)) 546 printf(LMSG("real select returns %d"), error); 547 #endif 548 if (error) 549 goto select_out; 550 551 if (args->timeout) { 552 if (td->td_retval[0]) { 553 /* 554 * Compute how much time was left of the timeout, 555 * by subtracting the current time and the time 556 * before we started the call, and subtracting 557 * that result from the user-supplied value. 558 */ 559 microtime(&tv1); 560 timevalsub(&tv1, &tv0); 561 timevalsub(&utv, &tv1); 562 if (utv.tv_sec < 0) 563 timevalclear(&utv); 564 } else 565 timevalclear(&utv); 566 #ifdef DEBUG 567 if (ldebug(select)) 568 printf(LMSG("outgoing timeout (%jd/%ld)"), 569 (intmax_t)utv.tv_sec, utv.tv_usec); 570 #endif 571 ltv.tv_sec = utv.tv_sec; 572 ltv.tv_usec = utv.tv_usec; 573 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 574 goto select_out; 575 } 576 577 select_out: 578 #ifdef DEBUG 579 if (ldebug(select)) 580 printf(LMSG("select_out -> %d"), error); 581 #endif 582 return (error); 583 } 584 585 int 586 linux_mremap(struct thread *td, struct linux_mremap_args *args) 587 { 588 uintptr_t addr; 589 size_t len; 590 int error = 0; 591 592 #ifdef DEBUG 593 if (ldebug(mremap)) 594 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 595 (void *)(uintptr_t)args->addr, 596 (unsigned long)args->old_len, 597 (unsigned long)args->new_len, 598 (unsigned long)args->flags); 599 #endif 600 601 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 602 td->td_retval[0] = 0; 603 return (EINVAL); 604 } 605 606 /* 607 * Check for the page alignment. 608 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 609 */ 610 if (args->addr & PAGE_MASK) { 611 td->td_retval[0] = 0; 612 return (EINVAL); 613 } 614 615 args->new_len = round_page(args->new_len); 616 args->old_len = round_page(args->old_len); 617 618 if (args->new_len > args->old_len) { 619 td->td_retval[0] = 0; 620 return (ENOMEM); 621 } 622 623 if (args->new_len < args->old_len) { 624 addr = args->addr + args->new_len; 625 len = args->old_len - args->new_len; 626 error = kern_munmap(td, addr, len); 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 636 637 int 638 linux_msync(struct thread *td, struct linux_msync_args *args) 639 { 640 641 return (kern_msync(td, args->addr, args->len, 642 args->fl & ~LINUX_MS_SYNC)); 643 } 644 645 int 646 linux_time(struct thread *td, struct linux_time_args *args) 647 { 648 struct timeval tv; 649 l_time_t tm; 650 int error; 651 652 #ifdef DEBUG 653 if (ldebug(time)) 654 printf(ARGS(time, "*")); 655 #endif 656 657 microtime(&tv); 658 tm = tv.tv_sec; 659 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 660 return (error); 661 td->td_retval[0] = tm; 662 return (0); 663 } 664 665 struct l_times_argv { 666 l_clock_t tms_utime; 667 l_clock_t tms_stime; 668 l_clock_t tms_cutime; 669 l_clock_t tms_cstime; 670 }; 671 672 673 /* 674 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 675 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 676 * auxiliary vector entry. 677 */ 678 #define CLK_TCK 100 679 680 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 681 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 682 683 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 684 CONVNTCK(r) : CONVOTCK(r)) 685 686 int 687 linux_times(struct thread *td, struct linux_times_args *args) 688 { 689 struct timeval tv, utime, stime, cutime, cstime; 690 struct l_times_argv tms; 691 struct proc *p; 692 int error; 693 694 #ifdef DEBUG 695 if (ldebug(times)) 696 printf(ARGS(times, "*")); 697 #endif 698 699 if (args->buf != NULL) { 700 p = td->td_proc; 701 PROC_LOCK(p); 702 PROC_STATLOCK(p); 703 calcru(p, &utime, &stime); 704 PROC_STATUNLOCK(p); 705 calccru(p, &cutime, &cstime); 706 PROC_UNLOCK(p); 707 708 tms.tms_utime = CONVTCK(utime); 709 tms.tms_stime = CONVTCK(stime); 710 711 tms.tms_cutime = CONVTCK(cutime); 712 tms.tms_cstime = CONVTCK(cstime); 713 714 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 715 return (error); 716 } 717 718 microuptime(&tv); 719 td->td_retval[0] = (int)CONVTCK(tv); 720 return (0); 721 } 722 723 int 724 linux_newuname(struct thread *td, struct linux_newuname_args *args) 725 { 726 struct l_new_utsname utsname; 727 char osname[LINUX_MAX_UTSNAME]; 728 char osrelease[LINUX_MAX_UTSNAME]; 729 char *p; 730 731 #ifdef DEBUG 732 if (ldebug(newuname)) 733 printf(ARGS(newuname, "*")); 734 #endif 735 736 linux_get_osname(td, osname); 737 linux_get_osrelease(td, osrelease); 738 739 bzero(&utsname, sizeof(utsname)); 740 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 741 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 742 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 743 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 744 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 745 for (p = utsname.version; *p != '\0'; ++p) 746 if (*p == '\n') { 747 *p = '\0'; 748 break; 749 } 750 strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME); 751 752 return (copyout(&utsname, args->buf, sizeof(utsname))); 753 } 754 755 struct l_utimbuf { 756 l_time_t l_actime; 757 l_time_t l_modtime; 758 }; 759 760 int 761 linux_utime(struct thread *td, struct linux_utime_args *args) 762 { 763 struct timeval tv[2], *tvp; 764 struct l_utimbuf lut; 765 char *fname; 766 int error; 767 768 LCONVPATHEXIST(td, args->fname, &fname); 769 770 #ifdef DEBUG 771 if (ldebug(utime)) 772 printf(ARGS(utime, "%s, *"), fname); 773 #endif 774 775 if (args->times) { 776 if ((error = copyin(args->times, &lut, sizeof lut))) { 777 LFREEPATH(fname); 778 return (error); 779 } 780 tv[0].tv_sec = lut.l_actime; 781 tv[0].tv_usec = 0; 782 tv[1].tv_sec = lut.l_modtime; 783 tv[1].tv_usec = 0; 784 tvp = tv; 785 } else 786 tvp = NULL; 787 788 error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, tvp, 789 UIO_SYSSPACE); 790 LFREEPATH(fname); 791 return (error); 792 } 793 794 int 795 linux_utimes(struct thread *td, struct linux_utimes_args *args) 796 { 797 l_timeval ltv[2]; 798 struct timeval tv[2], *tvp = NULL; 799 char *fname; 800 int error; 801 802 LCONVPATHEXIST(td, args->fname, &fname); 803 804 #ifdef DEBUG 805 if (ldebug(utimes)) 806 printf(ARGS(utimes, "%s, *"), fname); 807 #endif 808 809 if (args->tptr != NULL) { 810 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 811 LFREEPATH(fname); 812 return (error); 813 } 814 tv[0].tv_sec = ltv[0].tv_sec; 815 tv[0].tv_usec = ltv[0].tv_usec; 816 tv[1].tv_sec = ltv[1].tv_sec; 817 tv[1].tv_usec = ltv[1].tv_usec; 818 tvp = tv; 819 } 820 821 error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, 822 tvp, UIO_SYSSPACE); 823 LFREEPATH(fname); 824 return (error); 825 } 826 827 static int 828 linux_utimensat_nsec_valid(l_long nsec) 829 { 830 831 if (nsec == LINUX_UTIME_OMIT || nsec == LINUX_UTIME_NOW) 832 return (0); 833 if (nsec >= 0 && nsec <= 999999999) 834 return (0); 835 return (1); 836 } 837 838 int 839 linux_utimensat(struct thread *td, struct linux_utimensat_args *args) 840 { 841 struct l_timespec l_times[2]; 842 struct timespec times[2], *timesp = NULL; 843 char *path = NULL; 844 int error, dfd, flags = 0; 845 846 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 847 848 #ifdef DEBUG 849 if (ldebug(utimensat)) 850 printf(ARGS(utimensat, "%d, *"), dfd); 851 #endif 852 853 if (args->flags & ~LINUX_AT_SYMLINK_NOFOLLOW) 854 return (EINVAL); 855 856 if (args->times != NULL) { 857 error = copyin(args->times, l_times, sizeof(l_times)); 858 if (error != 0) 859 return (error); 860 861 if (linux_utimensat_nsec_valid(l_times[0].tv_nsec) != 0 || 862 linux_utimensat_nsec_valid(l_times[1].tv_nsec) != 0) 863 return (EINVAL); 864 865 times[0].tv_sec = l_times[0].tv_sec; 866 switch (l_times[0].tv_nsec) 867 { 868 case LINUX_UTIME_OMIT: 869 times[0].tv_nsec = UTIME_OMIT; 870 break; 871 case LINUX_UTIME_NOW: 872 times[0].tv_nsec = UTIME_NOW; 873 break; 874 default: 875 times[0].tv_nsec = l_times[0].tv_nsec; 876 } 877 878 times[1].tv_sec = l_times[1].tv_sec; 879 switch (l_times[1].tv_nsec) 880 { 881 case LINUX_UTIME_OMIT: 882 times[1].tv_nsec = UTIME_OMIT; 883 break; 884 case LINUX_UTIME_NOW: 885 times[1].tv_nsec = UTIME_NOW; 886 break; 887 default: 888 times[1].tv_nsec = l_times[1].tv_nsec; 889 break; 890 } 891 timesp = times; 892 893 /* This breaks POSIX, but is what the Linux kernel does 894 * _on purpose_ (documented in the man page for utimensat(2)), 895 * so we must follow that behaviour. */ 896 if (times[0].tv_nsec == UTIME_OMIT && 897 times[1].tv_nsec == UTIME_OMIT) 898 return (0); 899 } 900 901 if (args->pathname != NULL) 902 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 903 else if (args->flags != 0) 904 return (EINVAL); 905 906 if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) 907 flags |= AT_SYMLINK_NOFOLLOW; 908 909 if (path == NULL) 910 error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE); 911 else { 912 error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp, 913 UIO_SYSSPACE, flags); 914 LFREEPATH(path); 915 } 916 917 return (error); 918 } 919 920 int 921 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 922 { 923 l_timeval ltv[2]; 924 struct timeval tv[2], *tvp = NULL; 925 char *fname; 926 int error, dfd; 927 928 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 929 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 930 931 #ifdef DEBUG 932 if (ldebug(futimesat)) 933 printf(ARGS(futimesat, "%s, *"), fname); 934 #endif 935 936 if (args->utimes != NULL) { 937 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 938 LFREEPATH(fname); 939 return (error); 940 } 941 tv[0].tv_sec = ltv[0].tv_sec; 942 tv[0].tv_usec = ltv[0].tv_usec; 943 tv[1].tv_sec = ltv[1].tv_sec; 944 tv[1].tv_usec = ltv[1].tv_usec; 945 tvp = tv; 946 } 947 948 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 949 LFREEPATH(fname); 950 return (error); 951 } 952 953 int 954 linux_common_wait(struct thread *td, int pid, int *status, 955 int options, struct rusage *ru) 956 { 957 int error, tmpstat; 958 959 error = kern_wait(td, pid, &tmpstat, options, ru); 960 if (error) 961 return (error); 962 963 if (status) { 964 tmpstat &= 0xffff; 965 if (WIFSIGNALED(tmpstat)) 966 tmpstat = (tmpstat & 0xffffff80) | 967 bsd_to_linux_signal(WTERMSIG(tmpstat)); 968 else if (WIFSTOPPED(tmpstat)) 969 tmpstat = (tmpstat & 0xffff00ff) | 970 (bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8); 971 else if (WIFCONTINUED(tmpstat)) 972 tmpstat = 0xffff; 973 error = copyout(&tmpstat, status, sizeof(int)); 974 } 975 976 return (error); 977 } 978 979 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 980 int 981 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 982 { 983 struct linux_wait4_args wait4_args; 984 985 #ifdef DEBUG 986 if (ldebug(waitpid)) 987 printf(ARGS(waitpid, "%d, %p, %d"), 988 args->pid, (void *)args->status, args->options); 989 #endif 990 991 wait4_args.pid = args->pid; 992 wait4_args.status = args->status; 993 wait4_args.options = args->options; 994 wait4_args.rusage = NULL; 995 996 return (linux_wait4(td, &wait4_args)); 997 } 998 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 999 1000 int 1001 linux_wait4(struct thread *td, struct linux_wait4_args *args) 1002 { 1003 int error, options; 1004 struct rusage ru, *rup; 1005 1006 #ifdef DEBUG 1007 if (ldebug(wait4)) 1008 printf(ARGS(wait4, "%d, %p, %d, %p"), 1009 args->pid, (void *)args->status, args->options, 1010 (void *)args->rusage); 1011 #endif 1012 if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG | 1013 LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL)) 1014 return (EINVAL); 1015 1016 options = WEXITED; 1017 linux_to_bsd_waitopts(args->options, &options); 1018 1019 if (args->rusage != NULL) 1020 rup = &ru; 1021 else 1022 rup = NULL; 1023 error = linux_common_wait(td, args->pid, args->status, options, rup); 1024 if (error != 0) 1025 return (error); 1026 if (args->rusage != NULL) 1027 error = linux_copyout_rusage(&ru, args->rusage); 1028 return (error); 1029 } 1030 1031 int 1032 linux_waitid(struct thread *td, struct linux_waitid_args *args) 1033 { 1034 int status, options, sig; 1035 struct __wrusage wru; 1036 siginfo_t siginfo; 1037 l_siginfo_t lsi; 1038 idtype_t idtype; 1039 struct proc *p; 1040 int error; 1041 1042 options = 0; 1043 linux_to_bsd_waitopts(args->options, &options); 1044 1045 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 1046 return (EINVAL); 1047 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 1048 return (EINVAL); 1049 1050 switch (args->idtype) { 1051 case LINUX_P_ALL: 1052 idtype = P_ALL; 1053 break; 1054 case LINUX_P_PID: 1055 if (args->id <= 0) 1056 return (EINVAL); 1057 idtype = P_PID; 1058 break; 1059 case LINUX_P_PGID: 1060 if (args->id <= 0) 1061 return (EINVAL); 1062 idtype = P_PGID; 1063 break; 1064 default: 1065 return (EINVAL); 1066 } 1067 1068 error = kern_wait6(td, idtype, args->id, &status, options, 1069 &wru, &siginfo); 1070 if (error != 0) 1071 return (error); 1072 if (args->rusage != NULL) { 1073 error = linux_copyout_rusage(&wru.wru_children, 1074 args->rusage); 1075 if (error != 0) 1076 return (error); 1077 } 1078 if (args->info != NULL) { 1079 p = td->td_proc; 1080 if (td->td_retval[0] == 0) 1081 bzero(&lsi, sizeof(lsi)); 1082 else { 1083 sig = bsd_to_linux_signal(siginfo.si_signo); 1084 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 1085 } 1086 error = copyout(&lsi, args->info, sizeof(lsi)); 1087 } 1088 td->td_retval[0] = 0; 1089 1090 return (error); 1091 } 1092 1093 int 1094 linux_mknod(struct thread *td, struct linux_mknod_args *args) 1095 { 1096 char *path; 1097 int error; 1098 1099 LCONVPATHCREAT(td, args->path, &path); 1100 1101 #ifdef DEBUG 1102 if (ldebug(mknod)) 1103 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1104 (uintmax_t)args->dev); 1105 #endif 1106 1107 switch (args->mode & S_IFMT) { 1108 case S_IFIFO: 1109 case S_IFSOCK: 1110 error = kern_mkfifoat(td, AT_FDCWD, path, UIO_SYSSPACE, 1111 args->mode); 1112 break; 1113 1114 case S_IFCHR: 1115 case S_IFBLK: 1116 error = kern_mknodat(td, AT_FDCWD, path, UIO_SYSSPACE, 1117 args->mode, 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_openat(td, AT_FDCWD, 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 1142 int 1143 linux_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 */ 1193 int 1194 linux_personality(struct thread *td, struct linux_personality_args *args) 1195 { 1196 struct linux_pemuldata *pem; 1197 struct proc *p = td->td_proc; 1198 uint32_t old; 1199 1200 #ifdef DEBUG 1201 if (ldebug(personality)) 1202 printf(ARGS(personality, "%u"), args->per); 1203 #endif 1204 1205 PROC_LOCK(p); 1206 pem = pem_find(p); 1207 old = pem->persona; 1208 if (args->per != 0xffffffff) 1209 pem->persona = args->per; 1210 PROC_UNLOCK(p); 1211 1212 td->td_retval[0] = old; 1213 return (0); 1214 } 1215 1216 struct l_itimerval { 1217 l_timeval it_interval; 1218 l_timeval it_value; 1219 }; 1220 1221 #define B2L_ITIMERVAL(bip, lip) \ 1222 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1223 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1224 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1225 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1226 1227 int 1228 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1229 { 1230 int error; 1231 struct l_itimerval ls; 1232 struct itimerval aitv, oitv; 1233 1234 #ifdef DEBUG 1235 if (ldebug(setitimer)) 1236 printf(ARGS(setitimer, "%p, %p"), 1237 (void *)uap->itv, (void *)uap->oitv); 1238 #endif 1239 1240 if (uap->itv == NULL) { 1241 uap->itv = uap->oitv; 1242 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1243 } 1244 1245 error = copyin(uap->itv, &ls, sizeof(ls)); 1246 if (error != 0) 1247 return (error); 1248 B2L_ITIMERVAL(&aitv, &ls); 1249 #ifdef DEBUG 1250 if (ldebug(setitimer)) { 1251 printf("setitimer: value: sec: %jd, usec: %ld\n", 1252 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1253 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1254 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1255 } 1256 #endif 1257 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1258 if (error != 0 || uap->oitv == NULL) 1259 return (error); 1260 B2L_ITIMERVAL(&ls, &oitv); 1261 1262 return (copyout(&ls, uap->oitv, sizeof(ls))); 1263 } 1264 1265 int 1266 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1267 { 1268 int error; 1269 struct l_itimerval ls; 1270 struct itimerval aitv; 1271 1272 #ifdef DEBUG 1273 if (ldebug(getitimer)) 1274 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1275 #endif 1276 error = kern_getitimer(td, uap->which, &aitv); 1277 if (error != 0) 1278 return (error); 1279 B2L_ITIMERVAL(&ls, &aitv); 1280 return (copyout(&ls, uap->itv, sizeof(ls))); 1281 } 1282 1283 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1284 int 1285 linux_nice(struct thread *td, struct linux_nice_args *args) 1286 { 1287 struct setpriority_args bsd_args; 1288 1289 bsd_args.which = PRIO_PROCESS; 1290 bsd_args.who = 0; /* current process */ 1291 bsd_args.prio = args->inc; 1292 return (sys_setpriority(td, &bsd_args)); 1293 } 1294 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1295 1296 int 1297 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1298 { 1299 struct ucred *newcred, *oldcred; 1300 l_gid_t *linux_gidset; 1301 gid_t *bsd_gidset; 1302 int ngrp, error; 1303 struct proc *p; 1304 1305 ngrp = args->gidsetsize; 1306 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1307 return (EINVAL); 1308 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1309 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1310 if (error) 1311 goto out; 1312 newcred = crget(); 1313 crextend(newcred, ngrp + 1); 1314 p = td->td_proc; 1315 PROC_LOCK(p); 1316 oldcred = p->p_ucred; 1317 crcopy(newcred, oldcred); 1318 1319 /* 1320 * cr_groups[0] holds egid. Setting the whole set from 1321 * the supplied set will cause egid to be changed too. 1322 * Keep cr_groups[0] unchanged to prevent that. 1323 */ 1324 1325 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1326 PROC_UNLOCK(p); 1327 crfree(newcred); 1328 goto out; 1329 } 1330 1331 if (ngrp > 0) { 1332 newcred->cr_ngroups = ngrp + 1; 1333 1334 bsd_gidset = newcred->cr_groups; 1335 ngrp--; 1336 while (ngrp >= 0) { 1337 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1338 ngrp--; 1339 } 1340 } else 1341 newcred->cr_ngroups = 1; 1342 1343 setsugid(p); 1344 proc_set_cred(p, newcred); 1345 PROC_UNLOCK(p); 1346 crfree(oldcred); 1347 error = 0; 1348 out: 1349 free(linux_gidset, M_LINUX); 1350 return (error); 1351 } 1352 1353 int 1354 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1355 { 1356 struct ucred *cred; 1357 l_gid_t *linux_gidset; 1358 gid_t *bsd_gidset; 1359 int bsd_gidsetsz, ngrp, error; 1360 1361 cred = td->td_ucred; 1362 bsd_gidset = cred->cr_groups; 1363 bsd_gidsetsz = cred->cr_ngroups - 1; 1364 1365 /* 1366 * cr_groups[0] holds egid. Returning the whole set 1367 * here will cause a duplicate. Exclude cr_groups[0] 1368 * to prevent that. 1369 */ 1370 1371 if ((ngrp = args->gidsetsize) == 0) { 1372 td->td_retval[0] = bsd_gidsetsz; 1373 return (0); 1374 } 1375 1376 if (ngrp < bsd_gidsetsz) 1377 return (EINVAL); 1378 1379 ngrp = 0; 1380 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1381 M_LINUX, M_WAITOK); 1382 while (ngrp < bsd_gidsetsz) { 1383 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1384 ngrp++; 1385 } 1386 1387 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1388 free(linux_gidset, M_LINUX); 1389 if (error) 1390 return (error); 1391 1392 td->td_retval[0] = ngrp; 1393 return (0); 1394 } 1395 1396 int 1397 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1398 { 1399 struct rlimit bsd_rlim; 1400 struct l_rlimit rlim; 1401 u_int which; 1402 int error; 1403 1404 #ifdef DEBUG 1405 if (ldebug(setrlimit)) 1406 printf(ARGS(setrlimit, "%d, %p"), 1407 args->resource, (void *)args->rlim); 1408 #endif 1409 1410 if (args->resource >= LINUX_RLIM_NLIMITS) 1411 return (EINVAL); 1412 1413 which = linux_to_bsd_resource[args->resource]; 1414 if (which == -1) 1415 return (EINVAL); 1416 1417 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1418 if (error) 1419 return (error); 1420 1421 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1422 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1423 return (kern_setrlimit(td, which, &bsd_rlim)); 1424 } 1425 1426 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1427 int 1428 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1429 { 1430 struct l_rlimit rlim; 1431 struct rlimit bsd_rlim; 1432 u_int which; 1433 1434 #ifdef DEBUG 1435 if (ldebug(old_getrlimit)) 1436 printf(ARGS(old_getrlimit, "%d, %p"), 1437 args->resource, (void *)args->rlim); 1438 #endif 1439 1440 if (args->resource >= LINUX_RLIM_NLIMITS) 1441 return (EINVAL); 1442 1443 which = linux_to_bsd_resource[args->resource]; 1444 if (which == -1) 1445 return (EINVAL); 1446 1447 lim_rlimit(td, which, &bsd_rlim); 1448 1449 #ifdef COMPAT_LINUX32 1450 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1451 if (rlim.rlim_cur == UINT_MAX) 1452 rlim.rlim_cur = INT_MAX; 1453 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1454 if (rlim.rlim_max == UINT_MAX) 1455 rlim.rlim_max = INT_MAX; 1456 #else 1457 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1458 if (rlim.rlim_cur == ULONG_MAX) 1459 rlim.rlim_cur = LONG_MAX; 1460 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1461 if (rlim.rlim_max == ULONG_MAX) 1462 rlim.rlim_max = LONG_MAX; 1463 #endif 1464 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1465 } 1466 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1467 1468 int 1469 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1470 { 1471 struct l_rlimit rlim; 1472 struct rlimit bsd_rlim; 1473 u_int which; 1474 1475 #ifdef DEBUG 1476 if (ldebug(getrlimit)) 1477 printf(ARGS(getrlimit, "%d, %p"), 1478 args->resource, (void *)args->rlim); 1479 #endif 1480 1481 if (args->resource >= LINUX_RLIM_NLIMITS) 1482 return (EINVAL); 1483 1484 which = linux_to_bsd_resource[args->resource]; 1485 if (which == -1) 1486 return (EINVAL); 1487 1488 lim_rlimit(td, which, &bsd_rlim); 1489 1490 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1491 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1492 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1493 } 1494 1495 int 1496 linux_sched_setscheduler(struct thread *td, 1497 struct linux_sched_setscheduler_args *args) 1498 { 1499 struct sched_param sched_param; 1500 struct thread *tdt; 1501 int error, policy; 1502 1503 #ifdef DEBUG 1504 if (ldebug(sched_setscheduler)) 1505 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1506 args->pid, args->policy, (const void *)args->param); 1507 #endif 1508 1509 switch (args->policy) { 1510 case LINUX_SCHED_OTHER: 1511 policy = SCHED_OTHER; 1512 break; 1513 case LINUX_SCHED_FIFO: 1514 policy = SCHED_FIFO; 1515 break; 1516 case LINUX_SCHED_RR: 1517 policy = SCHED_RR; 1518 break; 1519 default: 1520 return (EINVAL); 1521 } 1522 1523 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1524 if (error) 1525 return (error); 1526 1527 tdt = linux_tdfind(td, args->pid, -1); 1528 if (tdt == NULL) 1529 return (ESRCH); 1530 1531 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1532 PROC_UNLOCK(tdt->td_proc); 1533 return (error); 1534 } 1535 1536 int 1537 linux_sched_getscheduler(struct thread *td, 1538 struct linux_sched_getscheduler_args *args) 1539 { 1540 struct thread *tdt; 1541 int error, policy; 1542 1543 #ifdef DEBUG 1544 if (ldebug(sched_getscheduler)) 1545 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1546 #endif 1547 1548 tdt = linux_tdfind(td, args->pid, -1); 1549 if (tdt == NULL) 1550 return (ESRCH); 1551 1552 error = kern_sched_getscheduler(td, tdt, &policy); 1553 PROC_UNLOCK(tdt->td_proc); 1554 1555 switch (policy) { 1556 case SCHED_OTHER: 1557 td->td_retval[0] = LINUX_SCHED_OTHER; 1558 break; 1559 case SCHED_FIFO: 1560 td->td_retval[0] = LINUX_SCHED_FIFO; 1561 break; 1562 case SCHED_RR: 1563 td->td_retval[0] = LINUX_SCHED_RR; 1564 break; 1565 } 1566 return (error); 1567 } 1568 1569 int 1570 linux_sched_get_priority_max(struct thread *td, 1571 struct linux_sched_get_priority_max_args *args) 1572 { 1573 struct sched_get_priority_max_args bsd; 1574 1575 #ifdef DEBUG 1576 if (ldebug(sched_get_priority_max)) 1577 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1578 #endif 1579 1580 switch (args->policy) { 1581 case LINUX_SCHED_OTHER: 1582 bsd.policy = SCHED_OTHER; 1583 break; 1584 case LINUX_SCHED_FIFO: 1585 bsd.policy = SCHED_FIFO; 1586 break; 1587 case LINUX_SCHED_RR: 1588 bsd.policy = SCHED_RR; 1589 break; 1590 default: 1591 return (EINVAL); 1592 } 1593 return (sys_sched_get_priority_max(td, &bsd)); 1594 } 1595 1596 int 1597 linux_sched_get_priority_min(struct thread *td, 1598 struct linux_sched_get_priority_min_args *args) 1599 { 1600 struct sched_get_priority_min_args bsd; 1601 1602 #ifdef DEBUG 1603 if (ldebug(sched_get_priority_min)) 1604 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1605 #endif 1606 1607 switch (args->policy) { 1608 case LINUX_SCHED_OTHER: 1609 bsd.policy = SCHED_OTHER; 1610 break; 1611 case LINUX_SCHED_FIFO: 1612 bsd.policy = SCHED_FIFO; 1613 break; 1614 case LINUX_SCHED_RR: 1615 bsd.policy = SCHED_RR; 1616 break; 1617 default: 1618 return (EINVAL); 1619 } 1620 return (sys_sched_get_priority_min(td, &bsd)); 1621 } 1622 1623 #define REBOOT_CAD_ON 0x89abcdef 1624 #define REBOOT_CAD_OFF 0 1625 #define REBOOT_HALT 0xcdef0123 1626 #define REBOOT_RESTART 0x01234567 1627 #define REBOOT_RESTART2 0xA1B2C3D4 1628 #define REBOOT_POWEROFF 0x4321FEDC 1629 #define REBOOT_MAGIC1 0xfee1dead 1630 #define REBOOT_MAGIC2 0x28121969 1631 #define REBOOT_MAGIC2A 0x05121996 1632 #define REBOOT_MAGIC2B 0x16041998 1633 1634 int 1635 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1636 { 1637 struct reboot_args bsd_args; 1638 1639 #ifdef DEBUG 1640 if (ldebug(reboot)) 1641 printf(ARGS(reboot, "0x%x"), args->cmd); 1642 #endif 1643 1644 if (args->magic1 != REBOOT_MAGIC1) 1645 return (EINVAL); 1646 1647 switch (args->magic2) { 1648 case REBOOT_MAGIC2: 1649 case REBOOT_MAGIC2A: 1650 case REBOOT_MAGIC2B: 1651 break; 1652 default: 1653 return (EINVAL); 1654 } 1655 1656 switch (args->cmd) { 1657 case REBOOT_CAD_ON: 1658 case REBOOT_CAD_OFF: 1659 return (priv_check(td, PRIV_REBOOT)); 1660 case REBOOT_HALT: 1661 bsd_args.opt = RB_HALT; 1662 break; 1663 case REBOOT_RESTART: 1664 case REBOOT_RESTART2: 1665 bsd_args.opt = 0; 1666 break; 1667 case REBOOT_POWEROFF: 1668 bsd_args.opt = RB_POWEROFF; 1669 break; 1670 default: 1671 return (EINVAL); 1672 } 1673 return (sys_reboot(td, &bsd_args)); 1674 } 1675 1676 1677 /* 1678 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1679 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1680 * are assumed to be preserved. The following lightweight syscalls fixes 1681 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1682 * 1683 * linux_getpid() - MP SAFE 1684 * linux_getgid() - MP SAFE 1685 * linux_getuid() - MP SAFE 1686 */ 1687 1688 int 1689 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1690 { 1691 1692 #ifdef DEBUG 1693 if (ldebug(getpid)) 1694 printf(ARGS(getpid, "")); 1695 #endif 1696 td->td_retval[0] = td->td_proc->p_pid; 1697 1698 return (0); 1699 } 1700 1701 int 1702 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1703 { 1704 struct linux_emuldata *em; 1705 1706 #ifdef DEBUG 1707 if (ldebug(gettid)) 1708 printf(ARGS(gettid, "")); 1709 #endif 1710 1711 em = em_find(td); 1712 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1713 1714 td->td_retval[0] = em->em_tid; 1715 1716 return (0); 1717 } 1718 1719 1720 int 1721 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1722 { 1723 1724 #ifdef DEBUG 1725 if (ldebug(getppid)) 1726 printf(ARGS(getppid, "")); 1727 #endif 1728 1729 td->td_retval[0] = kern_getppid(td); 1730 return (0); 1731 } 1732 1733 int 1734 linux_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 1746 int 1747 linux_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 1760 int 1761 linux_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 1774 int 1775 linux_nosys(struct thread *td, struct nosys_args *ignore) 1776 { 1777 1778 return (ENOSYS); 1779 } 1780 1781 int 1782 linux_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 1799 int 1800 linux_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 1815 int 1816 linux_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 1831 int 1832 linux_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, args->error_code, 0); 1849 /* NOTREACHED */ 1850 } 1851 1852 #define _LINUX_CAPABILITY_VERSION 0x19980330 1853 1854 struct l_user_cap_header { 1855 l_int version; 1856 l_int pid; 1857 }; 1858 1859 struct l_user_cap_data { 1860 l_int effective; 1861 l_int permitted; 1862 l_int inheritable; 1863 }; 1864 1865 int 1866 linux_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 1904 int 1905 linux_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 1946 int 1947 linux_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 2038 int 2039 linux_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 2064 int 2065 linux_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 */ 2092 int 2093 linux_sched_getaffinity(struct thread *td, 2094 struct linux_sched_getaffinity_args *args) 2095 { 2096 int error; 2097 struct thread *tdt; 2098 2099 #ifdef DEBUG 2100 if (ldebug(sched_getaffinity)) 2101 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2102 args->len); 2103 #endif 2104 if (args->len < sizeof(cpuset_t)) 2105 return (EINVAL); 2106 2107 tdt = linux_tdfind(td, args->pid, -1); 2108 if (tdt == NULL) 2109 return (ESRCH); 2110 2111 PROC_UNLOCK(tdt->td_proc); 2112 2113 error = kern_cpuset_getaffinity(td, CPU_LEVEL_WHICH, CPU_WHICH_TID, 2114 tdt->td_tid, sizeof(cpuset_t), (cpuset_t *)args->user_mask_ptr); 2115 if (error == 0) 2116 td->td_retval[0] = sizeof(cpuset_t); 2117 2118 return (error); 2119 } 2120 2121 /* 2122 * Set affinity of a process. 2123 */ 2124 int 2125 linux_sched_setaffinity(struct thread *td, 2126 struct linux_sched_setaffinity_args *args) 2127 { 2128 struct thread *tdt; 2129 2130 #ifdef DEBUG 2131 if (ldebug(sched_setaffinity)) 2132 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2133 args->len); 2134 #endif 2135 if (args->len < sizeof(cpuset_t)) 2136 return (EINVAL); 2137 2138 tdt = linux_tdfind(td, args->pid, -1); 2139 if (tdt == NULL) 2140 return (ESRCH); 2141 2142 PROC_UNLOCK(tdt->td_proc); 2143 2144 return (kern_cpuset_setaffinity(td, CPU_LEVEL_WHICH, CPU_WHICH_TID, 2145 tdt->td_tid, sizeof(cpuset_t), (cpuset_t *) args->user_mask_ptr)); 2146 } 2147 2148 struct linux_rlimit64 { 2149 uint64_t rlim_cur; 2150 uint64_t rlim_max; 2151 }; 2152 2153 int 2154 linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2155 { 2156 struct rlimit rlim, nrlim; 2157 struct linux_rlimit64 lrlim; 2158 struct proc *p; 2159 u_int which; 2160 int flags; 2161 int error; 2162 2163 #ifdef DEBUG 2164 if (ldebug(prlimit64)) 2165 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2166 args->resource, (void *)args->new, (void *)args->old); 2167 #endif 2168 2169 if (args->resource >= LINUX_RLIM_NLIMITS) 2170 return (EINVAL); 2171 2172 which = linux_to_bsd_resource[args->resource]; 2173 if (which == -1) 2174 return (EINVAL); 2175 2176 if (args->new != NULL) { 2177 /* 2178 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2179 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2180 * as INFINITY so we do not need a conversion even. 2181 */ 2182 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2183 if (error != 0) 2184 return (error); 2185 } 2186 2187 flags = PGET_HOLD | PGET_NOTWEXIT; 2188 if (args->new != NULL) 2189 flags |= PGET_CANDEBUG; 2190 else 2191 flags |= PGET_CANSEE; 2192 error = pget(args->pid, flags, &p); 2193 if (error != 0) 2194 return (error); 2195 2196 if (args->old != NULL) { 2197 PROC_LOCK(p); 2198 lim_rlimit_proc(p, which, &rlim); 2199 PROC_UNLOCK(p); 2200 if (rlim.rlim_cur == RLIM_INFINITY) 2201 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2202 else 2203 lrlim.rlim_cur = rlim.rlim_cur; 2204 if (rlim.rlim_max == RLIM_INFINITY) 2205 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2206 else 2207 lrlim.rlim_max = rlim.rlim_max; 2208 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2209 if (error != 0) 2210 goto out; 2211 } 2212 2213 if (args->new != NULL) 2214 error = kern_proc_setrlimit(td, p, which, &nrlim); 2215 2216 out: 2217 PRELE(p); 2218 return (error); 2219 } 2220 2221 int 2222 linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2223 { 2224 struct timeval utv, tv0, tv1, *tvp; 2225 struct l_pselect6arg lpse6; 2226 struct l_timespec lts; 2227 struct timespec uts; 2228 l_sigset_t l_ss; 2229 sigset_t *ssp; 2230 sigset_t ss; 2231 int error; 2232 2233 ssp = NULL; 2234 if (args->sig != NULL) { 2235 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2236 if (error != 0) 2237 return (error); 2238 if (lpse6.ss_len != sizeof(l_ss)) 2239 return (EINVAL); 2240 if (lpse6.ss != 0) { 2241 error = copyin(PTRIN(lpse6.ss), &l_ss, 2242 sizeof(l_ss)); 2243 if (error != 0) 2244 return (error); 2245 linux_to_bsd_sigset(&l_ss, &ss); 2246 ssp = &ss; 2247 } 2248 } 2249 2250 /* 2251 * Currently glibc changes nanosecond number to microsecond. 2252 * This mean losing precision but for now it is hardly seen. 2253 */ 2254 if (args->tsp != NULL) { 2255 error = copyin(args->tsp, <s, sizeof(lts)); 2256 if (error != 0) 2257 return (error); 2258 error = linux_to_native_timespec(&uts, <s); 2259 if (error != 0) 2260 return (error); 2261 2262 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2263 if (itimerfix(&utv)) 2264 return (EINVAL); 2265 2266 microtime(&tv0); 2267 tvp = &utv; 2268 } else 2269 tvp = NULL; 2270 2271 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2272 args->exceptfds, tvp, ssp, LINUX_NFDBITS); 2273 2274 if (error == 0 && args->tsp != NULL) { 2275 if (td->td_retval[0] != 0) { 2276 /* 2277 * Compute how much time was left of the timeout, 2278 * by subtracting the current time and the time 2279 * before we started the call, and subtracting 2280 * that result from the user-supplied value. 2281 */ 2282 2283 microtime(&tv1); 2284 timevalsub(&tv1, &tv0); 2285 timevalsub(&utv, &tv1); 2286 if (utv.tv_sec < 0) 2287 timevalclear(&utv); 2288 } else 2289 timevalclear(&utv); 2290 2291 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2292 2293 error = native_to_linux_timespec(<s, &uts); 2294 if (error == 0) 2295 error = copyout(<s, args->tsp, sizeof(lts)); 2296 } 2297 2298 return (error); 2299 } 2300 2301 int 2302 linux_ppoll(struct thread *td, struct linux_ppoll_args *args) 2303 { 2304 struct timespec ts0, ts1; 2305 struct l_timespec lts; 2306 struct timespec uts, *tsp; 2307 l_sigset_t l_ss; 2308 sigset_t *ssp; 2309 sigset_t ss; 2310 int error; 2311 2312 if (args->sset != NULL) { 2313 if (args->ssize != sizeof(l_ss)) 2314 return (EINVAL); 2315 error = copyin(args->sset, &l_ss, sizeof(l_ss)); 2316 if (error) 2317 return (error); 2318 linux_to_bsd_sigset(&l_ss, &ss); 2319 ssp = &ss; 2320 } else 2321 ssp = NULL; 2322 if (args->tsp != NULL) { 2323 error = copyin(args->tsp, <s, sizeof(lts)); 2324 if (error) 2325 return (error); 2326 error = linux_to_native_timespec(&uts, <s); 2327 if (error != 0) 2328 return (error); 2329 2330 nanotime(&ts0); 2331 tsp = &uts; 2332 } else 2333 tsp = NULL; 2334 2335 error = kern_poll(td, args->fds, args->nfds, tsp, ssp); 2336 2337 if (error == 0 && args->tsp != NULL) { 2338 if (td->td_retval[0]) { 2339 nanotime(&ts1); 2340 timespecsub(&ts1, &ts0); 2341 timespecsub(&uts, &ts1); 2342 if (uts.tv_sec < 0) 2343 timespecclear(&uts); 2344 } else 2345 timespecclear(&uts); 2346 2347 error = native_to_linux_timespec(<s, &uts); 2348 if (error == 0) 2349 error = copyout(<s, args->tsp, sizeof(lts)); 2350 } 2351 2352 return (error); 2353 } 2354 2355 #if defined(DEBUG) || defined(KTR) 2356 /* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2357 2358 #ifdef COMPAT_LINUX32 2359 #define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL 2360 #else 2361 #define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL 2362 #endif 2363 2364 u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))]; 2365 2366 static int 2367 linux_debug(int syscall, int toggle, int global) 2368 { 2369 2370 if (global) { 2371 char c = toggle ? 0 : 0xff; 2372 2373 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2374 return (0); 2375 } 2376 if (syscall < 0 || syscall >= L_MAXSYSCALL) 2377 return (EINVAL); 2378 if (toggle) 2379 clrbit(linux_debug_map, syscall); 2380 else 2381 setbit(linux_debug_map, syscall); 2382 return (0); 2383 } 2384 #undef L_MAXSYSCALL 2385 2386 /* 2387 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2388 * 2389 * E.g.: sysctl linux.debug=21.0 2390 * 2391 * As a special case, syscall "all" will apply to all syscalls globally. 2392 */ 2393 #define LINUX_MAX_DEBUGSTR 16 2394 int 2395 linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2396 { 2397 char value[LINUX_MAX_DEBUGSTR], *p; 2398 int error, sysc, toggle; 2399 int global = 0; 2400 2401 value[0] = '\0'; 2402 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2403 if (error || req->newptr == NULL) 2404 return (error); 2405 for (p = value; *p != '\0' && *p != '.'; p++); 2406 if (*p == '\0') 2407 return (EINVAL); 2408 *p++ = '\0'; 2409 sysc = strtol(value, NULL, 0); 2410 toggle = strtol(p, NULL, 0); 2411 if (strcmp(value, "all") == 0) 2412 global = 1; 2413 error = linux_debug(sysc, toggle, global); 2414 return (error); 2415 } 2416 2417 #endif /* DEBUG || KTR */ 2418 2419 int 2420 linux_sched_rr_get_interval(struct thread *td, 2421 struct linux_sched_rr_get_interval_args *uap) 2422 { 2423 struct timespec ts; 2424 struct l_timespec lts; 2425 struct thread *tdt; 2426 int error; 2427 2428 /* 2429 * According to man in case the invalid pid specified 2430 * EINVAL should be returned. 2431 */ 2432 if (uap->pid < 0) 2433 return (EINVAL); 2434 2435 tdt = linux_tdfind(td, uap->pid, -1); 2436 if (tdt == NULL) 2437 return (ESRCH); 2438 2439 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2440 PROC_UNLOCK(tdt->td_proc); 2441 if (error != 0) 2442 return (error); 2443 error = native_to_linux_timespec(<s, &ts); 2444 if (error != 0) 2445 return (error); 2446 return (copyout(<s, uap->interval, sizeof(lts))); 2447 } 2448 2449 /* 2450 * In case when the Linux thread is the initial thread in 2451 * the thread group thread id is equal to the process id. 2452 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2453 */ 2454 struct thread * 2455 linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2456 { 2457 struct linux_emuldata *em; 2458 struct thread *tdt; 2459 struct proc *p; 2460 2461 tdt = NULL; 2462 if (tid == 0 || tid == td->td_tid) { 2463 tdt = td; 2464 PROC_LOCK(tdt->td_proc); 2465 } else if (tid > PID_MAX) 2466 tdt = tdfind(tid, pid); 2467 else { 2468 /* 2469 * Initial thread where the tid equal to the pid. 2470 */ 2471 p = pfind(tid); 2472 if (p != NULL) { 2473 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2474 /* 2475 * p is not a Linuxulator process. 2476 */ 2477 PROC_UNLOCK(p); 2478 return (NULL); 2479 } 2480 FOREACH_THREAD_IN_PROC(p, tdt) { 2481 em = em_find(tdt); 2482 if (tid == em->em_tid) 2483 return (tdt); 2484 } 2485 PROC_UNLOCK(p); 2486 } 2487 return (NULL); 2488 } 2489 2490 return (tdt); 2491 } 2492 2493 void 2494 linux_to_bsd_waitopts(int options, int *bsdopts) 2495 { 2496 2497 if (options & LINUX_WNOHANG) 2498 *bsdopts |= WNOHANG; 2499 if (options & LINUX_WUNTRACED) 2500 *bsdopts |= WUNTRACED; 2501 if (options & LINUX_WEXITED) 2502 *bsdopts |= WEXITED; 2503 if (options & LINUX_WCONTINUED) 2504 *bsdopts |= WCONTINUED; 2505 if (options & LINUX_WNOWAIT) 2506 *bsdopts |= WNOWAIT; 2507 2508 if (options & __WCLONE) 2509 *bsdopts |= WLINUXCLONE; 2510 } 2511