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