1 /*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 1994-1995 S�ren Schmidt 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer 11 * in this position and unchanged. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_compat.h" 34 #include "opt_mac.h" 35 36 #include <sys/param.h> 37 #include <sys/blist.h> 38 #include <sys/fcntl.h> 39 #if defined(__i386__) 40 #include <sys/imgact_aout.h> 41 #endif 42 #include <sys/jail.h> 43 #include <sys/kernel.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mman.h> 48 #include <sys/mount.h> 49 #include <sys/mutex.h> 50 #include <sys/namei.h> 51 #include <sys/priv.h> 52 #include <sys/proc.h> 53 #include <sys/reboot.h> 54 #include <sys/resourcevar.h> 55 #include <sys/sched.h> 56 #include <sys/signalvar.h> 57 #include <sys/stat.h> 58 #include <sys/syscallsubr.h> 59 #include <sys/sysctl.h> 60 #include <sys/sysproto.h> 61 #include <sys/systm.h> 62 #include <sys/time.h> 63 #include <sys/vmmeter.h> 64 #include <sys/vnode.h> 65 #include <sys/wait.h> 66 #include <sys/cpuset.h> 67 #include <sys/vimage.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_file.h> 88 #include <compat/linux/linux_mib.h> 89 #include <compat/linux/linux_signal.h> 90 #include <compat/linux/linux_util.h> 91 #include <compat/linux/linux_sysproto.h> 92 #include <compat/linux/linux_emul.h> 93 #include <compat/linux/linux_misc.h> 94 95 #define BSD_TO_LINUX_SIGNAL(sig) \ 96 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 97 98 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 99 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 100 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 101 RLIMIT_MEMLOCK, RLIMIT_AS 102 }; 103 104 struct l_sysinfo { 105 l_long uptime; /* Seconds since boot */ 106 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 107 #define LINUX_SYSINFO_LOADS_SCALE 65536 108 l_ulong totalram; /* Total usable main memory size */ 109 l_ulong freeram; /* Available memory size */ 110 l_ulong sharedram; /* Amount of shared memory */ 111 l_ulong bufferram; /* Memory used by buffers */ 112 l_ulong totalswap; /* Total swap space size */ 113 l_ulong freeswap; /* swap space still available */ 114 l_ushort procs; /* Number of current processes */ 115 l_ushort pads; 116 l_ulong totalbig; 117 l_ulong freebig; 118 l_uint mem_unit; 119 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 120 }; 121 int 122 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 123 { 124 struct l_sysinfo sysinfo; 125 vm_object_t object; 126 int i, j; 127 struct timespec ts; 128 129 getnanouptime(&ts); 130 if (ts.tv_nsec != 0) 131 ts.tv_sec++; 132 sysinfo.uptime = ts.tv_sec; 133 134 /* Use the information from the mib to get our load averages */ 135 for (i = 0; i < 3; i++) 136 sysinfo.loads[i] = averunnable.ldavg[i] * 137 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 138 139 sysinfo.totalram = physmem * PAGE_SIZE; 140 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 141 142 sysinfo.sharedram = 0; 143 mtx_lock(&vm_object_list_mtx); 144 TAILQ_FOREACH(object, &vm_object_list, object_list) 145 if (object->shadow_count > 1) 146 sysinfo.sharedram += object->resident_page_count; 147 mtx_unlock(&vm_object_list_mtx); 148 149 sysinfo.sharedram *= PAGE_SIZE; 150 sysinfo.bufferram = 0; 151 152 swap_pager_status(&i, &j); 153 sysinfo.totalswap = i * PAGE_SIZE; 154 sysinfo.freeswap = (i - j) * PAGE_SIZE; 155 156 sysinfo.procs = nprocs; 157 158 /* The following are only present in newer Linux kernels. */ 159 sysinfo.totalbig = 0; 160 sysinfo.freebig = 0; 161 sysinfo.mem_unit = 1; 162 163 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 164 } 165 166 int 167 linux_alarm(struct thread *td, struct linux_alarm_args *args) 168 { 169 struct itimerval it, old_it; 170 u_int secs; 171 int error; 172 173 #ifdef DEBUG 174 if (ldebug(alarm)) 175 printf(ARGS(alarm, "%u"), args->secs); 176 #endif 177 178 secs = args->secs; 179 180 if (secs > INT_MAX) 181 secs = INT_MAX; 182 183 it.it_value.tv_sec = (long) secs; 184 it.it_value.tv_usec = 0; 185 it.it_interval.tv_sec = 0; 186 it.it_interval.tv_usec = 0; 187 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 188 if (error) 189 return (error); 190 if (timevalisset(&old_it.it_value)) { 191 if (old_it.it_value.tv_usec != 0) 192 old_it.it_value.tv_sec++; 193 td->td_retval[0] = old_it.it_value.tv_sec; 194 } 195 return (0); 196 } 197 198 int 199 linux_brk(struct thread *td, struct linux_brk_args *args) 200 { 201 struct vmspace *vm = td->td_proc->p_vmspace; 202 vm_offset_t new, old; 203 struct obreak_args /* { 204 char * nsize; 205 } */ tmp; 206 207 #ifdef DEBUG 208 if (ldebug(brk)) 209 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 210 #endif 211 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 212 new = (vm_offset_t)args->dsend; 213 tmp.nsize = (char *)new; 214 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 215 td->td_retval[0] = (long)new; 216 else 217 td->td_retval[0] = (long)old; 218 219 return 0; 220 } 221 222 #if defined(__i386__) 223 /* XXX: what about amd64/linux32? */ 224 225 int 226 linux_uselib(struct thread *td, struct linux_uselib_args *args) 227 { 228 struct nameidata ni; 229 struct vnode *vp; 230 struct exec *a_out; 231 struct vattr attr; 232 vm_offset_t vmaddr; 233 unsigned long file_offset; 234 vm_offset_t buffer; 235 unsigned long bss_size; 236 char *library; 237 int error; 238 int locked, vfslocked; 239 240 LCONVPATHEXIST(td, args->library, &library); 241 242 #ifdef DEBUG 243 if (ldebug(uselib)) 244 printf(ARGS(uselib, "%s"), library); 245 #endif 246 247 a_out = NULL; 248 vfslocked = 0; 249 locked = 0; 250 vp = NULL; 251 252 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1, 253 UIO_SYSSPACE, library, td); 254 error = namei(&ni); 255 LFREEPATH(library); 256 if (error) 257 goto cleanup; 258 259 vp = ni.ni_vp; 260 vfslocked = NDHASGIANT(&ni); 261 NDFREE(&ni, NDF_ONLY_PNBUF); 262 263 /* 264 * From here on down, we have a locked vnode that must be unlocked. 265 * XXX: The code below largely duplicates exec_check_permissions(). 266 */ 267 locked = 1; 268 269 /* Writable? */ 270 if (vp->v_writecount) { 271 error = ETXTBSY; 272 goto cleanup; 273 } 274 275 /* Executable? */ 276 error = VOP_GETATTR(vp, &attr, td->td_ucred); 277 if (error) 278 goto cleanup; 279 280 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 281 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 282 /* EACCESS is what exec(2) returns. */ 283 error = ENOEXEC; 284 goto cleanup; 285 } 286 287 /* Sensible size? */ 288 if (attr.va_size == 0) { 289 error = ENOEXEC; 290 goto cleanup; 291 } 292 293 /* Can we access it? */ 294 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 295 if (error) 296 goto cleanup; 297 298 /* 299 * XXX: This should use vn_open() so that it is properly authorized, 300 * and to reduce code redundancy all over the place here. 301 * XXX: Not really, it duplicates far more of exec_check_permissions() 302 * than vn_open(). 303 */ 304 #ifdef MAC 305 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 306 if (error) 307 goto cleanup; 308 #endif 309 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 310 if (error) 311 goto cleanup; 312 313 /* Pull in executable header into kernel_map */ 314 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 315 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 316 if (error) 317 goto cleanup; 318 319 /* Is it a Linux binary ? */ 320 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 321 error = ENOEXEC; 322 goto cleanup; 323 } 324 325 /* 326 * While we are here, we should REALLY do some more checks 327 */ 328 329 /* Set file/virtual offset based on a.out variant. */ 330 switch ((int)(a_out->a_magic & 0xffff)) { 331 case 0413: /* ZMAGIC */ 332 file_offset = 1024; 333 break; 334 case 0314: /* QMAGIC */ 335 file_offset = 0; 336 break; 337 default: 338 error = ENOEXEC; 339 goto cleanup; 340 } 341 342 bss_size = round_page(a_out->a_bss); 343 344 /* Check various fields in header for validity/bounds. */ 345 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 346 error = ENOEXEC; 347 goto cleanup; 348 } 349 350 /* text + data can't exceed file size */ 351 if (a_out->a_data + a_out->a_text > attr.va_size) { 352 error = EFAULT; 353 goto cleanup; 354 } 355 356 /* 357 * text/data/bss must not exceed limits 358 * XXX - this is not complete. it should check current usage PLUS 359 * the resources needed by this library. 360 */ 361 PROC_LOCK(td->td_proc); 362 if (a_out->a_text > maxtsiz || 363 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) { 364 PROC_UNLOCK(td->td_proc); 365 error = ENOMEM; 366 goto cleanup; 367 } 368 PROC_UNLOCK(td->td_proc); 369 370 /* 371 * Prevent more writers. 372 * XXX: Note that if any of the VM operations fail below we don't 373 * clear this flag. 374 */ 375 vp->v_vflag |= VV_TEXT; 376 377 /* 378 * Lock no longer needed 379 */ 380 locked = 0; 381 VOP_UNLOCK(vp, 0); 382 VFS_UNLOCK_GIANT(vfslocked); 383 384 /* 385 * Check if file_offset page aligned. Currently we cannot handle 386 * misalinged file offsets, and so we read in the entire image 387 * (what a waste). 388 */ 389 if (file_offset & PAGE_MASK) { 390 #ifdef DEBUG 391 printf("uselib: Non page aligned binary %lu\n", file_offset); 392 #endif 393 /* Map text+data read/write/execute */ 394 395 /* a_entry is the load address and is page aligned */ 396 vmaddr = trunc_page(a_out->a_entry); 397 398 /* get anon user mapping, read+write+execute */ 399 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 400 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 401 VM_PROT_ALL, 0); 402 if (error) 403 goto cleanup; 404 405 /* map file into kernel_map */ 406 error = vm_mmap(kernel_map, &buffer, 407 round_page(a_out->a_text + a_out->a_data + file_offset), 408 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 409 trunc_page(file_offset)); 410 if (error) 411 goto cleanup; 412 413 /* copy from kernel VM space to user space */ 414 error = copyout(PTRIN(buffer + file_offset), 415 (void *)vmaddr, a_out->a_text + a_out->a_data); 416 417 /* release temporary kernel space */ 418 vm_map_remove(kernel_map, buffer, buffer + 419 round_page(a_out->a_text + a_out->a_data + file_offset)); 420 421 if (error) 422 goto cleanup; 423 } else { 424 #ifdef DEBUG 425 printf("uselib: Page aligned binary %lu\n", file_offset); 426 #endif 427 /* 428 * for QMAGIC, a_entry is 20 bytes beyond the load address 429 * to skip the executable header 430 */ 431 vmaddr = trunc_page(a_out->a_entry); 432 433 /* 434 * Map it all into the process's space as a single 435 * copy-on-write "data" segment. 436 */ 437 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 438 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 439 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 440 if (error) 441 goto cleanup; 442 } 443 #ifdef DEBUG 444 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 445 ((long *)vmaddr)[1]); 446 #endif 447 if (bss_size != 0) { 448 /* Calculate BSS start address */ 449 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 450 a_out->a_data; 451 452 /* allocate some 'anon' space */ 453 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 454 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 455 if (error) 456 goto cleanup; 457 } 458 459 cleanup: 460 /* Unlock vnode if needed */ 461 if (locked) { 462 VOP_UNLOCK(vp, 0); 463 VFS_UNLOCK_GIANT(vfslocked); 464 } 465 466 /* Release the kernel mapping. */ 467 if (a_out) 468 vm_map_remove(kernel_map, (vm_offset_t)a_out, 469 (vm_offset_t)a_out + PAGE_SIZE); 470 471 return error; 472 } 473 474 #endif /* __i386__ */ 475 476 int 477 linux_select(struct thread *td, struct linux_select_args *args) 478 { 479 l_timeval ltv; 480 struct timeval tv0, tv1, utv, *tvp; 481 int error; 482 483 #ifdef DEBUG 484 if (ldebug(select)) 485 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 486 (void *)args->readfds, (void *)args->writefds, 487 (void *)args->exceptfds, (void *)args->timeout); 488 #endif 489 490 /* 491 * Store current time for computation of the amount of 492 * time left. 493 */ 494 if (args->timeout) { 495 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 496 goto select_out; 497 utv.tv_sec = ltv.tv_sec; 498 utv.tv_usec = ltv.tv_usec; 499 #ifdef DEBUG 500 if (ldebug(select)) 501 printf(LMSG("incoming timeout (%jd/%ld)"), 502 (intmax_t)utv.tv_sec, utv.tv_usec); 503 #endif 504 505 if (itimerfix(&utv)) { 506 /* 507 * The timeval was invalid. Convert it to something 508 * valid that will act as it does under Linux. 509 */ 510 utv.tv_sec += utv.tv_usec / 1000000; 511 utv.tv_usec %= 1000000; 512 if (utv.tv_usec < 0) { 513 utv.tv_sec -= 1; 514 utv.tv_usec += 1000000; 515 } 516 if (utv.tv_sec < 0) 517 timevalclear(&utv); 518 } 519 microtime(&tv0); 520 tvp = &utv; 521 } else 522 tvp = NULL; 523 524 error = kern_select(td, args->nfds, args->readfds, args->writefds, 525 args->exceptfds, tvp); 526 527 #ifdef DEBUG 528 if (ldebug(select)) 529 printf(LMSG("real select returns %d"), error); 530 #endif 531 if (error) 532 goto select_out; 533 534 if (args->timeout) { 535 if (td->td_retval[0]) { 536 /* 537 * Compute how much time was left of the timeout, 538 * by subtracting the current time and the time 539 * before we started the call, and subtracting 540 * that result from the user-supplied value. 541 */ 542 microtime(&tv1); 543 timevalsub(&tv1, &tv0); 544 timevalsub(&utv, &tv1); 545 if (utv.tv_sec < 0) 546 timevalclear(&utv); 547 } else 548 timevalclear(&utv); 549 #ifdef DEBUG 550 if (ldebug(select)) 551 printf(LMSG("outgoing timeout (%jd/%ld)"), 552 (intmax_t)utv.tv_sec, utv.tv_usec); 553 #endif 554 ltv.tv_sec = utv.tv_sec; 555 ltv.tv_usec = utv.tv_usec; 556 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 557 goto select_out; 558 } 559 560 select_out: 561 #ifdef DEBUG 562 if (ldebug(select)) 563 printf(LMSG("select_out -> %d"), error); 564 #endif 565 return error; 566 } 567 568 int 569 linux_mremap(struct thread *td, struct linux_mremap_args *args) 570 { 571 struct munmap_args /* { 572 void *addr; 573 size_t len; 574 } */ bsd_args; 575 int error = 0; 576 577 #ifdef DEBUG 578 if (ldebug(mremap)) 579 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 580 (void *)(uintptr_t)args->addr, 581 (unsigned long)args->old_len, 582 (unsigned long)args->new_len, 583 (unsigned long)args->flags); 584 #endif 585 586 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 587 td->td_retval[0] = 0; 588 return (EINVAL); 589 } 590 591 /* 592 * Check for the page alignment. 593 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 594 */ 595 if (args->addr & PAGE_MASK) { 596 td->td_retval[0] = 0; 597 return (EINVAL); 598 } 599 600 args->new_len = round_page(args->new_len); 601 args->old_len = round_page(args->old_len); 602 603 if (args->new_len > args->old_len) { 604 td->td_retval[0] = 0; 605 return ENOMEM; 606 } 607 608 if (args->new_len < args->old_len) { 609 bsd_args.addr = 610 (caddr_t)((uintptr_t)args->addr + args->new_len); 611 bsd_args.len = args->old_len - args->new_len; 612 error = munmap(td, &bsd_args); 613 } 614 615 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 616 return error; 617 } 618 619 #define LINUX_MS_ASYNC 0x0001 620 #define LINUX_MS_INVALIDATE 0x0002 621 #define LINUX_MS_SYNC 0x0004 622 623 int 624 linux_msync(struct thread *td, struct linux_msync_args *args) 625 { 626 struct msync_args bsd_args; 627 628 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 629 bsd_args.len = (uintptr_t)args->len; 630 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 631 632 return msync(td, &bsd_args); 633 } 634 635 int 636 linux_time(struct thread *td, struct linux_time_args *args) 637 { 638 struct timeval tv; 639 l_time_t tm; 640 int error; 641 642 #ifdef DEBUG 643 if (ldebug(time)) 644 printf(ARGS(time, "*")); 645 #endif 646 647 microtime(&tv); 648 tm = tv.tv_sec; 649 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 650 return error; 651 td->td_retval[0] = tm; 652 return 0; 653 } 654 655 struct l_times_argv { 656 l_long tms_utime; 657 l_long tms_stime; 658 l_long tms_cutime; 659 l_long tms_cstime; 660 }; 661 662 #define CLK_TCK 100 /* Linux uses 100 */ 663 664 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 665 666 int 667 linux_times(struct thread *td, struct linux_times_args *args) 668 { 669 struct timeval tv, utime, stime, cutime, cstime; 670 struct l_times_argv tms; 671 struct proc *p; 672 int error; 673 674 #ifdef DEBUG 675 if (ldebug(times)) 676 printf(ARGS(times, "*")); 677 #endif 678 679 if (args->buf != NULL) { 680 p = td->td_proc; 681 PROC_LOCK(p); 682 PROC_SLOCK(p); 683 calcru(p, &utime, &stime); 684 PROC_SUNLOCK(p); 685 calccru(p, &cutime, &cstime); 686 PROC_UNLOCK(p); 687 688 tms.tms_utime = CONVTCK(utime); 689 tms.tms_stime = CONVTCK(stime); 690 691 tms.tms_cutime = CONVTCK(cutime); 692 tms.tms_cstime = CONVTCK(cstime); 693 694 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 695 return error; 696 } 697 698 microuptime(&tv); 699 td->td_retval[0] = (int)CONVTCK(tv); 700 return 0; 701 } 702 703 int 704 linux_newuname(struct thread *td, struct linux_newuname_args *args) 705 { 706 INIT_VPROCG(TD_TO_VPROCG(td)); 707 struct l_new_utsname utsname; 708 char osname[LINUX_MAX_UTSNAME]; 709 char osrelease[LINUX_MAX_UTSNAME]; 710 char *p; 711 712 #ifdef DEBUG 713 if (ldebug(newuname)) 714 printf(ARGS(newuname, "*")); 715 #endif 716 717 linux_get_osname(td, osname); 718 linux_get_osrelease(td, osrelease); 719 720 bzero(&utsname, sizeof(utsname)); 721 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 722 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 723 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 724 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 725 for (p = utsname.version; *p != '\0'; ++p) 726 if (*p == '\n') { 727 *p = '\0'; 728 break; 729 } 730 strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME); 731 732 mtx_lock(&hostname_mtx); 733 strlcpy(utsname.domainname, V_domainname, LINUX_MAX_UTSNAME); 734 mtx_unlock(&hostname_mtx); 735 736 return (copyout(&utsname, args->buf, sizeof(utsname))); 737 } 738 739 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 740 struct l_utimbuf { 741 l_time_t l_actime; 742 l_time_t l_modtime; 743 }; 744 745 int 746 linux_utime(struct thread *td, struct linux_utime_args *args) 747 { 748 struct timeval tv[2], *tvp; 749 struct l_utimbuf lut; 750 char *fname; 751 int error; 752 753 LCONVPATHEXIST(td, args->fname, &fname); 754 755 #ifdef DEBUG 756 if (ldebug(utime)) 757 printf(ARGS(utime, "%s, *"), fname); 758 #endif 759 760 if (args->times) { 761 if ((error = copyin(args->times, &lut, sizeof lut))) { 762 LFREEPATH(fname); 763 return error; 764 } 765 tv[0].tv_sec = lut.l_actime; 766 tv[0].tv_usec = 0; 767 tv[1].tv_sec = lut.l_modtime; 768 tv[1].tv_usec = 0; 769 tvp = tv; 770 } else 771 tvp = NULL; 772 773 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 774 LFREEPATH(fname); 775 return (error); 776 } 777 778 int 779 linux_utimes(struct thread *td, struct linux_utimes_args *args) 780 { 781 l_timeval ltv[2]; 782 struct timeval tv[2], *tvp = NULL; 783 char *fname; 784 int error; 785 786 LCONVPATHEXIST(td, args->fname, &fname); 787 788 #ifdef DEBUG 789 if (ldebug(utimes)) 790 printf(ARGS(utimes, "%s, *"), fname); 791 #endif 792 793 if (args->tptr != NULL) { 794 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 795 LFREEPATH(fname); 796 return (error); 797 } 798 tv[0].tv_sec = ltv[0].tv_sec; 799 tv[0].tv_usec = ltv[0].tv_usec; 800 tv[1].tv_sec = ltv[1].tv_sec; 801 tv[1].tv_usec = ltv[1].tv_usec; 802 tvp = tv; 803 } 804 805 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 806 LFREEPATH(fname); 807 return (error); 808 } 809 810 int 811 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 812 { 813 l_timeval ltv[2]; 814 struct timeval tv[2], *tvp = NULL; 815 char *fname; 816 int error, dfd; 817 818 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 819 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 820 821 #ifdef DEBUG 822 if (ldebug(futimesat)) 823 printf(ARGS(futimesat, "%s, *"), fname); 824 #endif 825 826 if (args->utimes != NULL) { 827 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 828 LFREEPATH(fname); 829 return (error); 830 } 831 tv[0].tv_sec = ltv[0].tv_sec; 832 tv[0].tv_usec = ltv[0].tv_usec; 833 tv[1].tv_sec = ltv[1].tv_sec; 834 tv[1].tv_usec = ltv[1].tv_usec; 835 tvp = tv; 836 } 837 838 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 839 LFREEPATH(fname); 840 return (error); 841 } 842 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 843 844 #define __WCLONE 0x80000000 845 846 int 847 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 848 { 849 int error, options, tmpstat; 850 851 #ifdef DEBUG 852 if (ldebug(waitpid)) 853 printf(ARGS(waitpid, "%d, %p, %d"), 854 args->pid, (void *)args->status, args->options); 855 #endif 856 /* 857 * this is necessary because the test in kern_wait doesn't work 858 * because we mess with the options here 859 */ 860 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) 861 return (EINVAL); 862 863 options = (args->options & (WNOHANG | WUNTRACED)); 864 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 865 if (args->options & __WCLONE) 866 options |= WLINUXCLONE; 867 868 error = kern_wait(td, args->pid, &tmpstat, options, NULL); 869 if (error) 870 return error; 871 872 if (args->status) { 873 tmpstat &= 0xffff; 874 if (WIFSIGNALED(tmpstat)) 875 tmpstat = (tmpstat & 0xffffff80) | 876 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 877 else if (WIFSTOPPED(tmpstat)) 878 tmpstat = (tmpstat & 0xffff00ff) | 879 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 880 return copyout(&tmpstat, args->status, sizeof(int)); 881 } 882 883 return 0; 884 } 885 886 int 887 linux_wait4(struct thread *td, struct linux_wait4_args *args) 888 { 889 int error, options, tmpstat; 890 struct rusage ru, *rup; 891 struct proc *p; 892 893 #ifdef DEBUG 894 if (ldebug(wait4)) 895 printf(ARGS(wait4, "%d, %p, %d, %p"), 896 args->pid, (void *)args->status, args->options, 897 (void *)args->rusage); 898 #endif 899 900 options = (args->options & (WNOHANG | WUNTRACED)); 901 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 902 if (args->options & __WCLONE) 903 options |= WLINUXCLONE; 904 905 if (args->rusage != NULL) 906 rup = &ru; 907 else 908 rup = NULL; 909 error = kern_wait(td, args->pid, &tmpstat, options, rup); 910 if (error) 911 return error; 912 913 p = td->td_proc; 914 PROC_LOCK(p); 915 sigqueue_delete(&p->p_sigqueue, SIGCHLD); 916 PROC_UNLOCK(p); 917 918 if (args->status) { 919 tmpstat &= 0xffff; 920 if (WIFSIGNALED(tmpstat)) 921 tmpstat = (tmpstat & 0xffffff80) | 922 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 923 else if (WIFSTOPPED(tmpstat)) 924 tmpstat = (tmpstat & 0xffff00ff) | 925 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 926 error = copyout(&tmpstat, args->status, sizeof(int)); 927 } 928 if (args->rusage != NULL && error == 0) 929 error = copyout(&ru, args->rusage, sizeof(ru)); 930 931 return (error); 932 } 933 934 int 935 linux_mknod(struct thread *td, struct linux_mknod_args *args) 936 { 937 char *path; 938 int error; 939 940 LCONVPATHCREAT(td, args->path, &path); 941 942 #ifdef DEBUG 943 if (ldebug(mknod)) 944 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 945 #endif 946 947 switch (args->mode & S_IFMT) { 948 case S_IFIFO: 949 case S_IFSOCK: 950 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 951 break; 952 953 case S_IFCHR: 954 case S_IFBLK: 955 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 956 args->dev); 957 break; 958 959 case S_IFDIR: 960 error = EPERM; 961 break; 962 963 case 0: 964 args->mode |= S_IFREG; 965 /* FALLTHROUGH */ 966 case S_IFREG: 967 error = kern_open(td, path, UIO_SYSSPACE, 968 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 969 if (error == 0) 970 kern_close(td, td->td_retval[0]); 971 break; 972 973 default: 974 error = EINVAL; 975 break; 976 } 977 LFREEPATH(path); 978 return (error); 979 } 980 981 int 982 linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 983 { 984 char *path; 985 int error, dfd; 986 987 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 988 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 989 990 #ifdef DEBUG 991 if (ldebug(mknodat)) 992 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 993 #endif 994 995 switch (args->mode & S_IFMT) { 996 case S_IFIFO: 997 case S_IFSOCK: 998 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 999 break; 1000 1001 case S_IFCHR: 1002 case S_IFBLK: 1003 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1004 args->dev); 1005 break; 1006 1007 case S_IFDIR: 1008 error = EPERM; 1009 break; 1010 1011 case 0: 1012 args->mode |= S_IFREG; 1013 /* FALLTHROUGH */ 1014 case S_IFREG: 1015 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1016 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1017 if (error == 0) 1018 kern_close(td, td->td_retval[0]); 1019 break; 1020 1021 default: 1022 error = EINVAL; 1023 break; 1024 } 1025 LFREEPATH(path); 1026 return (error); 1027 } 1028 1029 /* 1030 * UGH! This is just about the dumbest idea I've ever heard!! 1031 */ 1032 int 1033 linux_personality(struct thread *td, struct linux_personality_args *args) 1034 { 1035 #ifdef DEBUG 1036 if (ldebug(personality)) 1037 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1038 #endif 1039 if (args->per != 0) 1040 return EINVAL; 1041 1042 /* Yes Jim, it's still a Linux... */ 1043 td->td_retval[0] = 0; 1044 return 0; 1045 } 1046 1047 struct l_itimerval { 1048 l_timeval it_interval; 1049 l_timeval it_value; 1050 }; 1051 1052 #define B2L_ITIMERVAL(bip, lip) \ 1053 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1054 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1055 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1056 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1057 1058 int 1059 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1060 { 1061 int error; 1062 struct l_itimerval ls; 1063 struct itimerval aitv, oitv; 1064 1065 #ifdef DEBUG 1066 if (ldebug(setitimer)) 1067 printf(ARGS(setitimer, "%p, %p"), 1068 (void *)uap->itv, (void *)uap->oitv); 1069 #endif 1070 1071 if (uap->itv == NULL) { 1072 uap->itv = uap->oitv; 1073 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1074 } 1075 1076 error = copyin(uap->itv, &ls, sizeof(ls)); 1077 if (error != 0) 1078 return (error); 1079 B2L_ITIMERVAL(&aitv, &ls); 1080 #ifdef DEBUG 1081 if (ldebug(setitimer)) { 1082 printf("setitimer: value: sec: %jd, usec: %ld\n", 1083 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1084 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1085 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1086 } 1087 #endif 1088 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1089 if (error != 0 || uap->oitv == NULL) 1090 return (error); 1091 B2L_ITIMERVAL(&ls, &oitv); 1092 1093 return (copyout(&ls, uap->oitv, sizeof(ls))); 1094 } 1095 1096 int 1097 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1098 { 1099 int error; 1100 struct l_itimerval ls; 1101 struct itimerval aitv; 1102 1103 #ifdef DEBUG 1104 if (ldebug(getitimer)) 1105 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1106 #endif 1107 error = kern_getitimer(td, uap->which, &aitv); 1108 if (error != 0) 1109 return (error); 1110 B2L_ITIMERVAL(&ls, &aitv); 1111 return (copyout(&ls, uap->itv, sizeof(ls))); 1112 } 1113 1114 int 1115 linux_nice(struct thread *td, struct linux_nice_args *args) 1116 { 1117 struct setpriority_args bsd_args; 1118 1119 bsd_args.which = PRIO_PROCESS; 1120 bsd_args.who = 0; /* current process */ 1121 bsd_args.prio = args->inc; 1122 return setpriority(td, &bsd_args); 1123 } 1124 1125 int 1126 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1127 { 1128 struct ucred *newcred, *oldcred; 1129 l_gid_t linux_gidset[NGROUPS]; 1130 gid_t *bsd_gidset; 1131 int ngrp, error; 1132 struct proc *p; 1133 1134 ngrp = args->gidsetsize; 1135 if (ngrp < 0 || ngrp >= NGROUPS) 1136 return (EINVAL); 1137 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1138 if (error) 1139 return (error); 1140 newcred = crget(); 1141 p = td->td_proc; 1142 PROC_LOCK(p); 1143 oldcred = p->p_ucred; 1144 1145 /* 1146 * cr_groups[0] holds egid. Setting the whole set from 1147 * the supplied set will cause egid to be changed too. 1148 * Keep cr_groups[0] unchanged to prevent that. 1149 */ 1150 1151 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1152 PROC_UNLOCK(p); 1153 crfree(newcred); 1154 return (error); 1155 } 1156 1157 crcopy(newcred, oldcred); 1158 if (ngrp > 0) { 1159 newcred->cr_ngroups = ngrp + 1; 1160 1161 bsd_gidset = newcred->cr_groups; 1162 ngrp--; 1163 while (ngrp >= 0) { 1164 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1165 ngrp--; 1166 } 1167 } else 1168 newcred->cr_ngroups = 1; 1169 1170 setsugid(p); 1171 p->p_ucred = newcred; 1172 PROC_UNLOCK(p); 1173 crfree(oldcred); 1174 return (0); 1175 } 1176 1177 int 1178 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1179 { 1180 struct ucred *cred; 1181 l_gid_t linux_gidset[NGROUPS]; 1182 gid_t *bsd_gidset; 1183 int bsd_gidsetsz, ngrp, error; 1184 1185 cred = td->td_ucred; 1186 bsd_gidset = cred->cr_groups; 1187 bsd_gidsetsz = cred->cr_ngroups - 1; 1188 1189 /* 1190 * cr_groups[0] holds egid. Returning the whole set 1191 * here will cause a duplicate. Exclude cr_groups[0] 1192 * to prevent that. 1193 */ 1194 1195 if ((ngrp = args->gidsetsize) == 0) { 1196 td->td_retval[0] = bsd_gidsetsz; 1197 return (0); 1198 } 1199 1200 if (ngrp < bsd_gidsetsz) 1201 return (EINVAL); 1202 1203 ngrp = 0; 1204 while (ngrp < bsd_gidsetsz) { 1205 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1206 ngrp++; 1207 } 1208 1209 if ((error = copyout(linux_gidset, args->grouplist, 1210 ngrp * sizeof(l_gid_t)))) 1211 return (error); 1212 1213 td->td_retval[0] = ngrp; 1214 return (0); 1215 } 1216 1217 int 1218 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1219 { 1220 struct rlimit bsd_rlim; 1221 struct l_rlimit rlim; 1222 u_int which; 1223 int error; 1224 1225 #ifdef DEBUG 1226 if (ldebug(setrlimit)) 1227 printf(ARGS(setrlimit, "%d, %p"), 1228 args->resource, (void *)args->rlim); 1229 #endif 1230 1231 if (args->resource >= LINUX_RLIM_NLIMITS) 1232 return (EINVAL); 1233 1234 which = linux_to_bsd_resource[args->resource]; 1235 if (which == -1) 1236 return (EINVAL); 1237 1238 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1239 if (error) 1240 return (error); 1241 1242 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1243 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1244 return (kern_setrlimit(td, which, &bsd_rlim)); 1245 } 1246 1247 int 1248 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1249 { 1250 struct l_rlimit rlim; 1251 struct proc *p = td->td_proc; 1252 struct rlimit bsd_rlim; 1253 u_int which; 1254 1255 #ifdef DEBUG 1256 if (ldebug(old_getrlimit)) 1257 printf(ARGS(old_getrlimit, "%d, %p"), 1258 args->resource, (void *)args->rlim); 1259 #endif 1260 1261 if (args->resource >= LINUX_RLIM_NLIMITS) 1262 return (EINVAL); 1263 1264 which = linux_to_bsd_resource[args->resource]; 1265 if (which == -1) 1266 return (EINVAL); 1267 1268 PROC_LOCK(p); 1269 lim_rlimit(p, which, &bsd_rlim); 1270 PROC_UNLOCK(p); 1271 1272 #ifdef COMPAT_LINUX32 1273 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1274 if (rlim.rlim_cur == UINT_MAX) 1275 rlim.rlim_cur = INT_MAX; 1276 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1277 if (rlim.rlim_max == UINT_MAX) 1278 rlim.rlim_max = INT_MAX; 1279 #else 1280 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1281 if (rlim.rlim_cur == ULONG_MAX) 1282 rlim.rlim_cur = LONG_MAX; 1283 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1284 if (rlim.rlim_max == ULONG_MAX) 1285 rlim.rlim_max = LONG_MAX; 1286 #endif 1287 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1288 } 1289 1290 int 1291 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1292 { 1293 struct l_rlimit rlim; 1294 struct proc *p = td->td_proc; 1295 struct rlimit bsd_rlim; 1296 u_int which; 1297 1298 #ifdef DEBUG 1299 if (ldebug(getrlimit)) 1300 printf(ARGS(getrlimit, "%d, %p"), 1301 args->resource, (void *)args->rlim); 1302 #endif 1303 1304 if (args->resource >= LINUX_RLIM_NLIMITS) 1305 return (EINVAL); 1306 1307 which = linux_to_bsd_resource[args->resource]; 1308 if (which == -1) 1309 return (EINVAL); 1310 1311 PROC_LOCK(p); 1312 lim_rlimit(p, which, &bsd_rlim); 1313 PROC_UNLOCK(p); 1314 1315 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1316 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1317 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1318 } 1319 1320 int 1321 linux_sched_setscheduler(struct thread *td, 1322 struct linux_sched_setscheduler_args *args) 1323 { 1324 struct sched_setscheduler_args bsd; 1325 1326 #ifdef DEBUG 1327 if (ldebug(sched_setscheduler)) 1328 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1329 args->pid, args->policy, (const void *)args->param); 1330 #endif 1331 1332 switch (args->policy) { 1333 case LINUX_SCHED_OTHER: 1334 bsd.policy = SCHED_OTHER; 1335 break; 1336 case LINUX_SCHED_FIFO: 1337 bsd.policy = SCHED_FIFO; 1338 break; 1339 case LINUX_SCHED_RR: 1340 bsd.policy = SCHED_RR; 1341 break; 1342 default: 1343 return EINVAL; 1344 } 1345 1346 bsd.pid = args->pid; 1347 bsd.param = (struct sched_param *)args->param; 1348 return sched_setscheduler(td, &bsd); 1349 } 1350 1351 int 1352 linux_sched_getscheduler(struct thread *td, 1353 struct linux_sched_getscheduler_args *args) 1354 { 1355 struct sched_getscheduler_args bsd; 1356 int error; 1357 1358 #ifdef DEBUG 1359 if (ldebug(sched_getscheduler)) 1360 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1361 #endif 1362 1363 bsd.pid = args->pid; 1364 error = sched_getscheduler(td, &bsd); 1365 1366 switch (td->td_retval[0]) { 1367 case SCHED_OTHER: 1368 td->td_retval[0] = LINUX_SCHED_OTHER; 1369 break; 1370 case SCHED_FIFO: 1371 td->td_retval[0] = LINUX_SCHED_FIFO; 1372 break; 1373 case SCHED_RR: 1374 td->td_retval[0] = LINUX_SCHED_RR; 1375 break; 1376 } 1377 1378 return error; 1379 } 1380 1381 int 1382 linux_sched_get_priority_max(struct thread *td, 1383 struct linux_sched_get_priority_max_args *args) 1384 { 1385 struct sched_get_priority_max_args bsd; 1386 1387 #ifdef DEBUG 1388 if (ldebug(sched_get_priority_max)) 1389 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1390 #endif 1391 1392 switch (args->policy) { 1393 case LINUX_SCHED_OTHER: 1394 bsd.policy = SCHED_OTHER; 1395 break; 1396 case LINUX_SCHED_FIFO: 1397 bsd.policy = SCHED_FIFO; 1398 break; 1399 case LINUX_SCHED_RR: 1400 bsd.policy = SCHED_RR; 1401 break; 1402 default: 1403 return EINVAL; 1404 } 1405 return sched_get_priority_max(td, &bsd); 1406 } 1407 1408 int 1409 linux_sched_get_priority_min(struct thread *td, 1410 struct linux_sched_get_priority_min_args *args) 1411 { 1412 struct sched_get_priority_min_args bsd; 1413 1414 #ifdef DEBUG 1415 if (ldebug(sched_get_priority_min)) 1416 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1417 #endif 1418 1419 switch (args->policy) { 1420 case LINUX_SCHED_OTHER: 1421 bsd.policy = SCHED_OTHER; 1422 break; 1423 case LINUX_SCHED_FIFO: 1424 bsd.policy = SCHED_FIFO; 1425 break; 1426 case LINUX_SCHED_RR: 1427 bsd.policy = SCHED_RR; 1428 break; 1429 default: 1430 return EINVAL; 1431 } 1432 return sched_get_priority_min(td, &bsd); 1433 } 1434 1435 #define REBOOT_CAD_ON 0x89abcdef 1436 #define REBOOT_CAD_OFF 0 1437 #define REBOOT_HALT 0xcdef0123 1438 #define REBOOT_RESTART 0x01234567 1439 #define REBOOT_RESTART2 0xA1B2C3D4 1440 #define REBOOT_POWEROFF 0x4321FEDC 1441 #define REBOOT_MAGIC1 0xfee1dead 1442 #define REBOOT_MAGIC2 0x28121969 1443 #define REBOOT_MAGIC2A 0x05121996 1444 #define REBOOT_MAGIC2B 0x16041998 1445 1446 int 1447 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1448 { 1449 struct reboot_args bsd_args; 1450 1451 #ifdef DEBUG 1452 if (ldebug(reboot)) 1453 printf(ARGS(reboot, "0x%x"), args->cmd); 1454 #endif 1455 1456 if (args->magic1 != REBOOT_MAGIC1) 1457 return EINVAL; 1458 1459 switch (args->magic2) { 1460 case REBOOT_MAGIC2: 1461 case REBOOT_MAGIC2A: 1462 case REBOOT_MAGIC2B: 1463 break; 1464 default: 1465 return EINVAL; 1466 } 1467 1468 switch (args->cmd) { 1469 case REBOOT_CAD_ON: 1470 case REBOOT_CAD_OFF: 1471 return (priv_check(td, PRIV_REBOOT)); 1472 case REBOOT_HALT: 1473 bsd_args.opt = RB_HALT; 1474 break; 1475 case REBOOT_RESTART: 1476 case REBOOT_RESTART2: 1477 bsd_args.opt = 0; 1478 break; 1479 case REBOOT_POWEROFF: 1480 bsd_args.opt = RB_POWEROFF; 1481 break; 1482 default: 1483 return EINVAL; 1484 } 1485 return reboot(td, &bsd_args); 1486 } 1487 1488 1489 /* 1490 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1491 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1492 * are assumed to be preserved. The following lightweight syscalls fixes 1493 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1494 * 1495 * linux_getpid() - MP SAFE 1496 * linux_getgid() - MP SAFE 1497 * linux_getuid() - MP SAFE 1498 */ 1499 1500 int 1501 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1502 { 1503 struct linux_emuldata *em; 1504 1505 #ifdef DEBUG 1506 if (ldebug(getpid)) 1507 printf(ARGS(getpid, "")); 1508 #endif 1509 1510 if (linux_use26(td)) { 1511 em = em_find(td->td_proc, EMUL_DONTLOCK); 1512 KASSERT(em != NULL, ("getpid: emuldata not found.\n")); 1513 td->td_retval[0] = em->shared->group_pid; 1514 } else { 1515 td->td_retval[0] = td->td_proc->p_pid; 1516 } 1517 1518 return (0); 1519 } 1520 1521 int 1522 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1523 { 1524 1525 #ifdef DEBUG 1526 if (ldebug(gettid)) 1527 printf(ARGS(gettid, "")); 1528 #endif 1529 1530 td->td_retval[0] = td->td_proc->p_pid; 1531 return (0); 1532 } 1533 1534 1535 int 1536 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1537 { 1538 struct linux_emuldata *em; 1539 struct proc *p, *pp; 1540 1541 #ifdef DEBUG 1542 if (ldebug(getppid)) 1543 printf(ARGS(getppid, "")); 1544 #endif 1545 1546 if (!linux_use26(td)) { 1547 PROC_LOCK(td->td_proc); 1548 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1549 PROC_UNLOCK(td->td_proc); 1550 return (0); 1551 } 1552 1553 em = em_find(td->td_proc, EMUL_DONTLOCK); 1554 1555 KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); 1556 1557 /* find the group leader */ 1558 p = pfind(em->shared->group_pid); 1559 1560 if (p == NULL) { 1561 #ifdef DEBUG 1562 printf(LMSG("parent process not found.\n")); 1563 #endif 1564 return (0); 1565 } 1566 1567 pp = p->p_pptr; /* switch to parent */ 1568 PROC_LOCK(pp); 1569 PROC_UNLOCK(p); 1570 1571 /* if its also linux process */ 1572 if (pp->p_sysent == &elf_linux_sysvec) { 1573 em = em_find(pp, EMUL_DONTLOCK); 1574 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); 1575 1576 td->td_retval[0] = em->shared->group_pid; 1577 } else 1578 td->td_retval[0] = pp->p_pid; 1579 1580 PROC_UNLOCK(pp); 1581 1582 return (0); 1583 } 1584 1585 int 1586 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1587 { 1588 1589 #ifdef DEBUG 1590 if (ldebug(getgid)) 1591 printf(ARGS(getgid, "")); 1592 #endif 1593 1594 td->td_retval[0] = td->td_ucred->cr_rgid; 1595 return (0); 1596 } 1597 1598 int 1599 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1600 { 1601 1602 #ifdef DEBUG 1603 if (ldebug(getuid)) 1604 printf(ARGS(getuid, "")); 1605 #endif 1606 1607 td->td_retval[0] = td->td_ucred->cr_ruid; 1608 return (0); 1609 } 1610 1611 1612 int 1613 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1614 { 1615 struct getsid_args bsd; 1616 1617 #ifdef DEBUG 1618 if (ldebug(getsid)) 1619 printf(ARGS(getsid, "%i"), args->pid); 1620 #endif 1621 1622 bsd.pid = args->pid; 1623 return getsid(td, &bsd); 1624 } 1625 1626 int 1627 linux_nosys(struct thread *td, struct nosys_args *ignore) 1628 { 1629 1630 return (ENOSYS); 1631 } 1632 1633 int 1634 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1635 { 1636 struct getpriority_args bsd_args; 1637 int error; 1638 1639 #ifdef DEBUG 1640 if (ldebug(getpriority)) 1641 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1642 #endif 1643 1644 bsd_args.which = args->which; 1645 bsd_args.who = args->who; 1646 error = getpriority(td, &bsd_args); 1647 td->td_retval[0] = 20 - td->td_retval[0]; 1648 return error; 1649 } 1650 1651 int 1652 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1653 { 1654 int name[2]; 1655 1656 #ifdef DEBUG 1657 if (ldebug(sethostname)) 1658 printf(ARGS(sethostname, "*, %i"), args->len); 1659 #endif 1660 1661 name[0] = CTL_KERN; 1662 name[1] = KERN_HOSTNAME; 1663 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1664 args->len, 0, 0)); 1665 } 1666 1667 int 1668 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1669 { 1670 int name[2]; 1671 1672 #ifdef DEBUG 1673 if (ldebug(setdomainname)) 1674 printf(ARGS(setdomainname, "*, %i"), args->len); 1675 #endif 1676 1677 name[0] = CTL_KERN; 1678 name[1] = KERN_NISDOMAINNAME; 1679 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1680 args->len, 0, 0)); 1681 } 1682 1683 int 1684 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1685 { 1686 struct linux_emuldata *em, *td_em, *tmp_em; 1687 struct proc *sp; 1688 1689 #ifdef DEBUG 1690 if (ldebug(exit_group)) 1691 printf(ARGS(exit_group, "%i"), args->error_code); 1692 #endif 1693 1694 if (linux_use26(td)) { 1695 td_em = em_find(td->td_proc, EMUL_DONTLOCK); 1696 1697 KASSERT(td_em != NULL, ("exit_group: emuldata not found.\n")); 1698 1699 EMUL_SHARED_RLOCK(&emul_shared_lock); 1700 LIST_FOREACH_SAFE(em, &td_em->shared->threads, threads, tmp_em) { 1701 if (em->pid == td_em->pid) 1702 continue; 1703 1704 sp = pfind(em->pid); 1705 psignal(sp, SIGKILL); 1706 PROC_UNLOCK(sp); 1707 #ifdef DEBUG 1708 printf(LMSG("linux_sys_exit_group: kill PID %d\n"), em->pid); 1709 #endif 1710 } 1711 1712 EMUL_SHARED_RUNLOCK(&emul_shared_lock); 1713 } 1714 /* 1715 * XXX: we should send a signal to the parent if 1716 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1717 * as it doesnt occur often. 1718 */ 1719 exit1(td, W_EXITCODE(args->error_code, 0)); 1720 1721 return (0); 1722 } 1723 1724 int 1725 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1726 { 1727 int error = 0, max_size; 1728 struct proc *p = td->td_proc; 1729 char comm[LINUX_MAX_COMM_LEN]; 1730 struct linux_emuldata *em; 1731 int pdeath_signal; 1732 1733 #ifdef DEBUG 1734 if (ldebug(prctl)) 1735 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, 1736 args->arg2, args->arg3, args->arg4, args->arg5); 1737 #endif 1738 1739 switch (args->option) { 1740 case LINUX_PR_SET_PDEATHSIG: 1741 if (!LINUX_SIG_VALID(args->arg2)) 1742 return (EINVAL); 1743 em = em_find(p, EMUL_DOLOCK); 1744 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1745 em->pdeath_signal = args->arg2; 1746 EMUL_UNLOCK(&emul_lock); 1747 break; 1748 case LINUX_PR_GET_PDEATHSIG: 1749 em = em_find(p, EMUL_DOLOCK); 1750 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1751 pdeath_signal = em->pdeath_signal; 1752 EMUL_UNLOCK(&emul_lock); 1753 error = copyout(&pdeath_signal, 1754 (void *)(register_t)args->arg2, 1755 sizeof(pdeath_signal)); 1756 break; 1757 case LINUX_PR_SET_NAME: 1758 /* 1759 * To be on the safe side we need to make sure to not 1760 * overflow the size a linux program expects. We already 1761 * do this here in the copyin, so that we don't need to 1762 * check on copyout. 1763 */ 1764 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1765 error = copyinstr((void *)(register_t)args->arg2, comm, 1766 max_size, NULL); 1767 1768 /* Linux silently truncates the name if it is too long. */ 1769 if (error == ENAMETOOLONG) { 1770 /* 1771 * XXX: copyinstr() isn't documented to populate the 1772 * array completely, so do a copyin() to be on the 1773 * safe side. This should be changed in case 1774 * copyinstr() is changed to guarantee this. 1775 */ 1776 error = copyin((void *)(register_t)args->arg2, comm, 1777 max_size - 1); 1778 comm[max_size - 1] = '\0'; 1779 } 1780 if (error) 1781 return (error); 1782 1783 PROC_LOCK(p); 1784 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1785 PROC_UNLOCK(p); 1786 break; 1787 case LINUX_PR_GET_NAME: 1788 PROC_LOCK(p); 1789 strlcpy(comm, p->p_comm, sizeof(comm)); 1790 PROC_UNLOCK(p); 1791 error = copyout(comm, (void *)(register_t)args->arg2, 1792 strlen(comm) + 1); 1793 break; 1794 default: 1795 error = EINVAL; 1796 break; 1797 } 1798 1799 return (error); 1800 } 1801 1802 /* 1803 * Get affinity of a process. 1804 */ 1805 int 1806 linux_sched_getaffinity(struct thread *td, 1807 struct linux_sched_getaffinity_args *args) 1808 { 1809 int error; 1810 struct cpuset_getaffinity_args cga; 1811 1812 #ifdef DEBUG 1813 if (ldebug(sched_getaffinity)) 1814 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 1815 args->len); 1816 #endif 1817 if (args->len < sizeof(cpuset_t)) 1818 return (EINVAL); 1819 1820 cga.level = CPU_LEVEL_WHICH; 1821 cga.which = CPU_WHICH_PID; 1822 cga.id = args->pid; 1823 cga.cpusetsize = sizeof(cpuset_t); 1824 cga.mask = (cpuset_t *) args->user_mask_ptr; 1825 1826 if ((error = cpuset_getaffinity(td, &cga)) == 0) 1827 td->td_retval[0] = sizeof(cpuset_t); 1828 1829 return (error); 1830 } 1831 1832 /* 1833 * Set affinity of a process. 1834 */ 1835 int 1836 linux_sched_setaffinity(struct thread *td, 1837 struct linux_sched_setaffinity_args *args) 1838 { 1839 struct cpuset_setaffinity_args csa; 1840 1841 #ifdef DEBUG 1842 if (ldebug(sched_setaffinity)) 1843 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 1844 args->len); 1845 #endif 1846 if (args->len < sizeof(cpuset_t)) 1847 return (EINVAL); 1848 1849 csa.level = CPU_LEVEL_WHICH; 1850 csa.which = CPU_WHICH_PID; 1851 csa.id = args->pid; 1852 csa.cpusetsize = sizeof(cpuset_t); 1853 csa.mask = (cpuset_t *) args->user_mask_ptr; 1854 1855 return (cpuset_setaffinity(td, &csa)); 1856 } 1857