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 68 #include <security/mac/mac_framework.h> 69 70 #include <vm/vm.h> 71 #include <vm/pmap.h> 72 #include <vm/vm_kern.h> 73 #include <vm/vm_map.h> 74 #include <vm/vm_extern.h> 75 #include <vm/vm_object.h> 76 #include <vm/swap_pager.h> 77 78 #ifdef COMPAT_LINUX32 79 #include <machine/../linux32/linux.h> 80 #include <machine/../linux32/linux32_proto.h> 81 #else 82 #include <machine/../linux/linux.h> 83 #include <machine/../linux/linux_proto.h> 84 #endif 85 86 #include <compat/linux/linux_file.h> 87 #include <compat/linux/linux_mib.h> 88 #include <compat/linux/linux_signal.h> 89 #include <compat/linux/linux_util.h> 90 #include <compat/linux/linux_sysproto.h> 91 #include <compat/linux/linux_emul.h> 92 #include <compat/linux/linux_misc.h> 93 94 #ifdef __i386__ 95 #include <machine/cputypes.h> 96 #endif 97 98 #define BSD_TO_LINUX_SIGNAL(sig) \ 99 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 100 101 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 102 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 103 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 104 RLIMIT_MEMLOCK, RLIMIT_AS 105 }; 106 107 struct l_sysinfo { 108 l_long uptime; /* Seconds since boot */ 109 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 110 #define LINUX_SYSINFO_LOADS_SCALE 65536 111 l_ulong totalram; /* Total usable main memory size */ 112 l_ulong freeram; /* Available memory size */ 113 l_ulong sharedram; /* Amount of shared memory */ 114 l_ulong bufferram; /* Memory used by buffers */ 115 l_ulong totalswap; /* Total swap space size */ 116 l_ulong freeswap; /* swap space still available */ 117 l_ushort procs; /* Number of current processes */ 118 l_ushort pads; 119 l_ulong totalbig; 120 l_ulong freebig; 121 l_uint mem_unit; 122 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 123 }; 124 int 125 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 126 { 127 struct l_sysinfo sysinfo; 128 vm_object_t object; 129 int i, j; 130 struct timespec ts; 131 132 getnanouptime(&ts); 133 if (ts.tv_nsec != 0) 134 ts.tv_sec++; 135 sysinfo.uptime = ts.tv_sec; 136 137 /* Use the information from the mib to get our load averages */ 138 for (i = 0; i < 3; i++) 139 sysinfo.loads[i] = averunnable.ldavg[i] * 140 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 141 142 sysinfo.totalram = physmem * PAGE_SIZE; 143 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 144 145 sysinfo.sharedram = 0; 146 mtx_lock(&vm_object_list_mtx); 147 TAILQ_FOREACH(object, &vm_object_list, object_list) 148 if (object->shadow_count > 1) 149 sysinfo.sharedram += object->resident_page_count; 150 mtx_unlock(&vm_object_list_mtx); 151 152 sysinfo.sharedram *= PAGE_SIZE; 153 sysinfo.bufferram = 0; 154 155 swap_pager_status(&i, &j); 156 sysinfo.totalswap = i * PAGE_SIZE; 157 sysinfo.freeswap = (i - j) * PAGE_SIZE; 158 159 sysinfo.procs = nprocs; 160 161 /* The following are only present in newer Linux kernels. */ 162 sysinfo.totalbig = 0; 163 sysinfo.freebig = 0; 164 sysinfo.mem_unit = 1; 165 166 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 167 } 168 169 int 170 linux_alarm(struct thread *td, struct linux_alarm_args *args) 171 { 172 struct itimerval it, old_it; 173 int error; 174 175 #ifdef DEBUG 176 if (ldebug(alarm)) 177 printf(ARGS(alarm, "%u"), args->secs); 178 #endif 179 180 if (args->secs > 100000000) 181 return (EINVAL); 182 183 it.it_value.tv_sec = (long)args->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, td); 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, FREAD); 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 /* 533 * See fs/select.c in the Linux kernel. Without this, 534 * Maelstrom doesn't work. 535 */ 536 if (error == ERESTART) 537 error = EINTR; 538 goto select_out; 539 } 540 541 if (args->timeout) { 542 if (td->td_retval[0]) { 543 /* 544 * Compute how much time was left of the timeout, 545 * by subtracting the current time and the time 546 * before we started the call, and subtracting 547 * that result from the user-supplied value. 548 */ 549 microtime(&tv1); 550 timevalsub(&tv1, &tv0); 551 timevalsub(&utv, &tv1); 552 if (utv.tv_sec < 0) 553 timevalclear(&utv); 554 } else 555 timevalclear(&utv); 556 #ifdef DEBUG 557 if (ldebug(select)) 558 printf(LMSG("outgoing timeout (%jd/%ld)"), 559 (intmax_t)utv.tv_sec, utv.tv_usec); 560 #endif 561 ltv.tv_sec = utv.tv_sec; 562 ltv.tv_usec = utv.tv_usec; 563 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 564 goto select_out; 565 } 566 567 select_out: 568 #ifdef DEBUG 569 if (ldebug(select)) 570 printf(LMSG("select_out -> %d"), error); 571 #endif 572 return error; 573 } 574 575 int 576 linux_mremap(struct thread *td, struct linux_mremap_args *args) 577 { 578 struct munmap_args /* { 579 void *addr; 580 size_t len; 581 } */ bsd_args; 582 int error = 0; 583 584 #ifdef DEBUG 585 if (ldebug(mremap)) 586 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 587 (void *)(uintptr_t)args->addr, 588 (unsigned long)args->old_len, 589 (unsigned long)args->new_len, 590 (unsigned long)args->flags); 591 #endif 592 593 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 594 td->td_retval[0] = 0; 595 return (EINVAL); 596 } 597 598 /* 599 * Check for the page alignment. 600 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 601 */ 602 if (args->addr & PAGE_MASK) { 603 td->td_retval[0] = 0; 604 return (EINVAL); 605 } 606 607 args->new_len = round_page(args->new_len); 608 args->old_len = round_page(args->old_len); 609 610 if (args->new_len > args->old_len) { 611 td->td_retval[0] = 0; 612 return ENOMEM; 613 } 614 615 if (args->new_len < args->old_len) { 616 bsd_args.addr = 617 (caddr_t)((uintptr_t)args->addr + args->new_len); 618 bsd_args.len = args->old_len - args->new_len; 619 error = munmap(td, &bsd_args); 620 } 621 622 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 623 return error; 624 } 625 626 #define LINUX_MS_ASYNC 0x0001 627 #define LINUX_MS_INVALIDATE 0x0002 628 #define LINUX_MS_SYNC 0x0004 629 630 int 631 linux_msync(struct thread *td, struct linux_msync_args *args) 632 { 633 struct msync_args bsd_args; 634 635 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 636 bsd_args.len = (uintptr_t)args->len; 637 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 638 639 return msync(td, &bsd_args); 640 } 641 642 int 643 linux_time(struct thread *td, struct linux_time_args *args) 644 { 645 struct timeval tv; 646 l_time_t tm; 647 int error; 648 649 #ifdef DEBUG 650 if (ldebug(time)) 651 printf(ARGS(time, "*")); 652 #endif 653 654 microtime(&tv); 655 tm = tv.tv_sec; 656 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 657 return error; 658 td->td_retval[0] = tm; 659 return 0; 660 } 661 662 struct l_times_argv { 663 l_long tms_utime; 664 l_long tms_stime; 665 l_long tms_cutime; 666 l_long tms_cstime; 667 }; 668 669 #define CLK_TCK 100 /* Linux uses 100 */ 670 671 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 672 673 int 674 linux_times(struct thread *td, struct linux_times_args *args) 675 { 676 struct timeval tv, utime, stime, cutime, cstime; 677 struct l_times_argv tms; 678 struct proc *p; 679 int error; 680 681 #ifdef DEBUG 682 if (ldebug(times)) 683 printf(ARGS(times, "*")); 684 #endif 685 686 if (args->buf != NULL) { 687 p = td->td_proc; 688 PROC_LOCK(p); 689 PROC_SLOCK(p); 690 calcru(p, &utime, &stime); 691 PROC_SUNLOCK(p); 692 calccru(p, &cutime, &cstime); 693 PROC_UNLOCK(p); 694 695 tms.tms_utime = CONVTCK(utime); 696 tms.tms_stime = CONVTCK(stime); 697 698 tms.tms_cutime = CONVTCK(cutime); 699 tms.tms_cstime = CONVTCK(cstime); 700 701 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 702 return error; 703 } 704 705 microuptime(&tv); 706 td->td_retval[0] = (int)CONVTCK(tv); 707 return 0; 708 } 709 710 int 711 linux_newuname(struct thread *td, struct linux_newuname_args *args) 712 { 713 struct l_new_utsname utsname; 714 char osname[LINUX_MAX_UTSNAME]; 715 char osrelease[LINUX_MAX_UTSNAME]; 716 char *p; 717 718 #ifdef DEBUG 719 if (ldebug(newuname)) 720 printf(ARGS(newuname, "*")); 721 #endif 722 723 linux_get_osname(td, osname); 724 linux_get_osrelease(td, osrelease); 725 726 bzero(&utsname, sizeof(utsname)); 727 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 728 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 729 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 730 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 731 for (p = utsname.version; *p != '\0'; ++p) 732 if (*p == '\n') { 733 *p = '\0'; 734 break; 735 } 736 #ifdef __i386__ 737 { 738 const char *class; 739 740 switch (cpu_class) { 741 case CPUCLASS_686: 742 class = "i686"; 743 break; 744 case CPUCLASS_586: 745 class = "i586"; 746 break; 747 case CPUCLASS_486: 748 class = "i486"; 749 break; 750 default: 751 class = "i386"; 752 } 753 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME); 754 } 755 #elif defined(__amd64__) /* XXX: Linux can change 'personality'. */ 756 #ifdef COMPAT_LINUX32 757 strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME); 758 #else 759 strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME); 760 #endif /* COMPAT_LINUX32 */ 761 #else /* something other than i386 or amd64 - assume we and Linux agree */ 762 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 763 #endif /* __i386__ */ 764 mtx_lock(&hostname_mtx); 765 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 766 mtx_unlock(&hostname_mtx); 767 768 return (copyout(&utsname, args->buf, sizeof(utsname))); 769 } 770 771 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 772 struct l_utimbuf { 773 l_time_t l_actime; 774 l_time_t l_modtime; 775 }; 776 777 int 778 linux_utime(struct thread *td, struct linux_utime_args *args) 779 { 780 struct timeval tv[2], *tvp; 781 struct l_utimbuf lut; 782 char *fname; 783 int error; 784 785 LCONVPATHEXIST(td, args->fname, &fname); 786 787 #ifdef DEBUG 788 if (ldebug(utime)) 789 printf(ARGS(utime, "%s, *"), fname); 790 #endif 791 792 if (args->times) { 793 if ((error = copyin(args->times, &lut, sizeof lut))) { 794 LFREEPATH(fname); 795 return error; 796 } 797 tv[0].tv_sec = lut.l_actime; 798 tv[0].tv_usec = 0; 799 tv[1].tv_sec = lut.l_modtime; 800 tv[1].tv_usec = 0; 801 tvp = tv; 802 } else 803 tvp = NULL; 804 805 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 806 LFREEPATH(fname); 807 return (error); 808 } 809 810 int 811 linux_utimes(struct thread *td, struct linux_utimes_args *args) 812 { 813 l_timeval ltv[2]; 814 struct timeval tv[2], *tvp = NULL; 815 char *fname; 816 int error; 817 818 LCONVPATHEXIST(td, args->fname, &fname); 819 820 #ifdef DEBUG 821 if (ldebug(utimes)) 822 printf(ARGS(utimes, "%s, *"), fname); 823 #endif 824 825 if (args->tptr != NULL) { 826 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 827 LFREEPATH(fname); 828 return (error); 829 } 830 tv[0].tv_sec = ltv[0].tv_sec; 831 tv[0].tv_usec = ltv[0].tv_usec; 832 tv[1].tv_sec = ltv[1].tv_sec; 833 tv[1].tv_usec = ltv[1].tv_usec; 834 tvp = tv; 835 } 836 837 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 838 LFREEPATH(fname); 839 return (error); 840 } 841 842 int 843 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 844 { 845 l_timeval ltv[2]; 846 struct timeval tv[2], *tvp = NULL; 847 char *fname; 848 int error, dfd; 849 850 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 851 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 852 853 #ifdef DEBUG 854 if (ldebug(futimesat)) 855 printf(ARGS(futimesat, "%s, *"), fname); 856 #endif 857 858 if (args->utimes != NULL) { 859 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 860 LFREEPATH(fname); 861 return (error); 862 } 863 tv[0].tv_sec = ltv[0].tv_sec; 864 tv[0].tv_usec = ltv[0].tv_usec; 865 tv[1].tv_sec = ltv[1].tv_sec; 866 tv[1].tv_usec = ltv[1].tv_usec; 867 tvp = tv; 868 } 869 870 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 871 LFREEPATH(fname); 872 return (error); 873 } 874 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 875 876 #define __WCLONE 0x80000000 877 878 int 879 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 880 { 881 int error, options, tmpstat; 882 883 #ifdef DEBUG 884 if (ldebug(waitpid)) 885 printf(ARGS(waitpid, "%d, %p, %d"), 886 args->pid, (void *)args->status, args->options); 887 #endif 888 /* 889 * this is necessary because the test in kern_wait doesn't work 890 * because we mess with the options here 891 */ 892 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) 893 return (EINVAL); 894 895 options = (args->options & (WNOHANG | WUNTRACED)); 896 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 897 if (args->options & __WCLONE) 898 options |= WLINUXCLONE; 899 900 error = kern_wait(td, args->pid, &tmpstat, options, NULL); 901 if (error) 902 return error; 903 904 if (args->status) { 905 tmpstat &= 0xffff; 906 if (WIFSIGNALED(tmpstat)) 907 tmpstat = (tmpstat & 0xffffff80) | 908 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 909 else if (WIFSTOPPED(tmpstat)) 910 tmpstat = (tmpstat & 0xffff00ff) | 911 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 912 return copyout(&tmpstat, args->status, sizeof(int)); 913 } 914 915 return 0; 916 } 917 918 int 919 linux_wait4(struct thread *td, struct linux_wait4_args *args) 920 { 921 int error, options, tmpstat; 922 struct rusage ru, *rup; 923 struct proc *p; 924 925 #ifdef DEBUG 926 if (ldebug(wait4)) 927 printf(ARGS(wait4, "%d, %p, %d, %p"), 928 args->pid, (void *)args->status, args->options, 929 (void *)args->rusage); 930 #endif 931 932 options = (args->options & (WNOHANG | WUNTRACED)); 933 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 934 if (args->options & __WCLONE) 935 options |= WLINUXCLONE; 936 937 if (args->rusage != NULL) 938 rup = &ru; 939 else 940 rup = NULL; 941 error = kern_wait(td, args->pid, &tmpstat, options, rup); 942 if (error) 943 return error; 944 945 p = td->td_proc; 946 PROC_LOCK(p); 947 sigqueue_delete(&p->p_sigqueue, SIGCHLD); 948 PROC_UNLOCK(p); 949 950 if (args->status) { 951 tmpstat &= 0xffff; 952 if (WIFSIGNALED(tmpstat)) 953 tmpstat = (tmpstat & 0xffffff80) | 954 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 955 else if (WIFSTOPPED(tmpstat)) 956 tmpstat = (tmpstat & 0xffff00ff) | 957 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 958 error = copyout(&tmpstat, args->status, sizeof(int)); 959 } 960 if (args->rusage != NULL && error == 0) 961 error = copyout(&ru, args->rusage, sizeof(ru)); 962 963 return (error); 964 } 965 966 int 967 linux_mknod(struct thread *td, struct linux_mknod_args *args) 968 { 969 char *path; 970 int error; 971 972 LCONVPATHCREAT(td, args->path, &path); 973 974 #ifdef DEBUG 975 if (ldebug(mknod)) 976 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 977 #endif 978 979 switch (args->mode & S_IFMT) { 980 case S_IFIFO: 981 case S_IFSOCK: 982 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 983 break; 984 985 case S_IFCHR: 986 case S_IFBLK: 987 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 988 args->dev); 989 break; 990 991 case S_IFDIR: 992 error = EPERM; 993 break; 994 995 case 0: 996 args->mode |= S_IFREG; 997 /* FALLTHROUGH */ 998 case S_IFREG: 999 error = kern_open(td, path, UIO_SYSSPACE, 1000 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1001 if (error == 0) 1002 kern_close(td, td->td_retval[0]); 1003 break; 1004 1005 default: 1006 error = EINVAL; 1007 break; 1008 } 1009 LFREEPATH(path); 1010 return (error); 1011 } 1012 1013 int 1014 linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1015 { 1016 char *path; 1017 int error, dfd; 1018 1019 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1020 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1021 1022 #ifdef DEBUG 1023 if (ldebug(mknodat)) 1024 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1025 #endif 1026 1027 switch (args->mode & S_IFMT) { 1028 case S_IFIFO: 1029 case S_IFSOCK: 1030 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1031 break; 1032 1033 case S_IFCHR: 1034 case S_IFBLK: 1035 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1036 args->dev); 1037 break; 1038 1039 case S_IFDIR: 1040 error = EPERM; 1041 break; 1042 1043 case 0: 1044 args->mode |= S_IFREG; 1045 /* FALLTHROUGH */ 1046 case S_IFREG: 1047 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1048 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1049 if (error == 0) 1050 kern_close(td, td->td_retval[0]); 1051 break; 1052 1053 default: 1054 error = EINVAL; 1055 break; 1056 } 1057 LFREEPATH(path); 1058 return (error); 1059 } 1060 1061 /* 1062 * UGH! This is just about the dumbest idea I've ever heard!! 1063 */ 1064 int 1065 linux_personality(struct thread *td, struct linux_personality_args *args) 1066 { 1067 #ifdef DEBUG 1068 if (ldebug(personality)) 1069 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1070 #endif 1071 if (args->per != 0) 1072 return EINVAL; 1073 1074 /* Yes Jim, it's still a Linux... */ 1075 td->td_retval[0] = 0; 1076 return 0; 1077 } 1078 1079 struct l_itimerval { 1080 l_timeval it_interval; 1081 l_timeval it_value; 1082 }; 1083 1084 #define B2L_ITIMERVAL(bip, lip) \ 1085 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1086 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1087 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1088 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1089 1090 int 1091 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1092 { 1093 int error; 1094 struct l_itimerval ls; 1095 struct itimerval aitv, oitv; 1096 1097 #ifdef DEBUG 1098 if (ldebug(setitimer)) 1099 printf(ARGS(setitimer, "%p, %p"), 1100 (void *)uap->itv, (void *)uap->oitv); 1101 #endif 1102 1103 if (uap->itv == NULL) { 1104 uap->itv = uap->oitv; 1105 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1106 } 1107 1108 error = copyin(uap->itv, &ls, sizeof(ls)); 1109 if (error != 0) 1110 return (error); 1111 B2L_ITIMERVAL(&aitv, &ls); 1112 #ifdef DEBUG 1113 if (ldebug(setitimer)) { 1114 printf("setitimer: value: sec: %jd, usec: %ld\n", 1115 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1116 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1117 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1118 } 1119 #endif 1120 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1121 if (error != 0 || uap->oitv == NULL) 1122 return (error); 1123 B2L_ITIMERVAL(&ls, &oitv); 1124 1125 return (copyout(&ls, uap->oitv, sizeof(ls))); 1126 } 1127 1128 int 1129 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1130 { 1131 int error; 1132 struct l_itimerval ls; 1133 struct itimerval aitv; 1134 1135 #ifdef DEBUG 1136 if (ldebug(getitimer)) 1137 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1138 #endif 1139 error = kern_getitimer(td, uap->which, &aitv); 1140 if (error != 0) 1141 return (error); 1142 B2L_ITIMERVAL(&ls, &aitv); 1143 return (copyout(&ls, uap->itv, sizeof(ls))); 1144 } 1145 1146 int 1147 linux_nice(struct thread *td, struct linux_nice_args *args) 1148 { 1149 struct setpriority_args bsd_args; 1150 1151 bsd_args.which = PRIO_PROCESS; 1152 bsd_args.who = 0; /* current process */ 1153 bsd_args.prio = args->inc; 1154 return setpriority(td, &bsd_args); 1155 } 1156 1157 int 1158 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1159 { 1160 struct ucred *newcred, *oldcred; 1161 l_gid_t linux_gidset[NGROUPS]; 1162 gid_t *bsd_gidset; 1163 int ngrp, error; 1164 struct proc *p; 1165 1166 ngrp = args->gidsetsize; 1167 if (ngrp < 0 || ngrp >= NGROUPS) 1168 return (EINVAL); 1169 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1170 if (error) 1171 return (error); 1172 newcred = crget(); 1173 p = td->td_proc; 1174 PROC_LOCK(p); 1175 oldcred = p->p_ucred; 1176 1177 /* 1178 * cr_groups[0] holds egid. Setting the whole set from 1179 * the supplied set will cause egid to be changed too. 1180 * Keep cr_groups[0] unchanged to prevent that. 1181 */ 1182 1183 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1184 PROC_UNLOCK(p); 1185 crfree(newcred); 1186 return (error); 1187 } 1188 1189 crcopy(newcred, oldcred); 1190 if (ngrp > 0) { 1191 newcred->cr_ngroups = ngrp + 1; 1192 1193 bsd_gidset = newcred->cr_groups; 1194 ngrp--; 1195 while (ngrp >= 0) { 1196 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1197 ngrp--; 1198 } 1199 } else 1200 newcred->cr_ngroups = 1; 1201 1202 setsugid(p); 1203 p->p_ucred = newcred; 1204 PROC_UNLOCK(p); 1205 crfree(oldcred); 1206 return (0); 1207 } 1208 1209 int 1210 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1211 { 1212 struct ucred *cred; 1213 l_gid_t linux_gidset[NGROUPS]; 1214 gid_t *bsd_gidset; 1215 int bsd_gidsetsz, ngrp, error; 1216 1217 cred = td->td_ucred; 1218 bsd_gidset = cred->cr_groups; 1219 bsd_gidsetsz = cred->cr_ngroups - 1; 1220 1221 /* 1222 * cr_groups[0] holds egid. Returning the whole set 1223 * here will cause a duplicate. Exclude cr_groups[0] 1224 * to prevent that. 1225 */ 1226 1227 if ((ngrp = args->gidsetsize) == 0) { 1228 td->td_retval[0] = bsd_gidsetsz; 1229 return (0); 1230 } 1231 1232 if (ngrp < bsd_gidsetsz) 1233 return (EINVAL); 1234 1235 ngrp = 0; 1236 while (ngrp < bsd_gidsetsz) { 1237 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1238 ngrp++; 1239 } 1240 1241 if ((error = copyout(linux_gidset, args->grouplist, 1242 ngrp * sizeof(l_gid_t)))) 1243 return (error); 1244 1245 td->td_retval[0] = ngrp; 1246 return (0); 1247 } 1248 1249 int 1250 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1251 { 1252 struct rlimit bsd_rlim; 1253 struct l_rlimit rlim; 1254 u_int which; 1255 int error; 1256 1257 #ifdef DEBUG 1258 if (ldebug(setrlimit)) 1259 printf(ARGS(setrlimit, "%d, %p"), 1260 args->resource, (void *)args->rlim); 1261 #endif 1262 1263 if (args->resource >= LINUX_RLIM_NLIMITS) 1264 return (EINVAL); 1265 1266 which = linux_to_bsd_resource[args->resource]; 1267 if (which == -1) 1268 return (EINVAL); 1269 1270 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1271 if (error) 1272 return (error); 1273 1274 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1275 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1276 return (kern_setrlimit(td, which, &bsd_rlim)); 1277 } 1278 1279 int 1280 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1281 { 1282 struct l_rlimit rlim; 1283 struct proc *p = td->td_proc; 1284 struct rlimit bsd_rlim; 1285 u_int which; 1286 1287 #ifdef DEBUG 1288 if (ldebug(old_getrlimit)) 1289 printf(ARGS(old_getrlimit, "%d, %p"), 1290 args->resource, (void *)args->rlim); 1291 #endif 1292 1293 if (args->resource >= LINUX_RLIM_NLIMITS) 1294 return (EINVAL); 1295 1296 which = linux_to_bsd_resource[args->resource]; 1297 if (which == -1) 1298 return (EINVAL); 1299 1300 PROC_LOCK(p); 1301 lim_rlimit(p, which, &bsd_rlim); 1302 PROC_UNLOCK(p); 1303 1304 #ifdef COMPAT_LINUX32 1305 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1306 if (rlim.rlim_cur == UINT_MAX) 1307 rlim.rlim_cur = INT_MAX; 1308 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1309 if (rlim.rlim_max == UINT_MAX) 1310 rlim.rlim_max = INT_MAX; 1311 #else 1312 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1313 if (rlim.rlim_cur == ULONG_MAX) 1314 rlim.rlim_cur = LONG_MAX; 1315 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1316 if (rlim.rlim_max == ULONG_MAX) 1317 rlim.rlim_max = LONG_MAX; 1318 #endif 1319 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1320 } 1321 1322 int 1323 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1324 { 1325 struct l_rlimit rlim; 1326 struct proc *p = td->td_proc; 1327 struct rlimit bsd_rlim; 1328 u_int which; 1329 1330 #ifdef DEBUG 1331 if (ldebug(getrlimit)) 1332 printf(ARGS(getrlimit, "%d, %p"), 1333 args->resource, (void *)args->rlim); 1334 #endif 1335 1336 if (args->resource >= LINUX_RLIM_NLIMITS) 1337 return (EINVAL); 1338 1339 which = linux_to_bsd_resource[args->resource]; 1340 if (which == -1) 1341 return (EINVAL); 1342 1343 PROC_LOCK(p); 1344 lim_rlimit(p, which, &bsd_rlim); 1345 PROC_UNLOCK(p); 1346 1347 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1348 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1349 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1350 } 1351 1352 int 1353 linux_sched_setscheduler(struct thread *td, 1354 struct linux_sched_setscheduler_args *args) 1355 { 1356 struct sched_setscheduler_args bsd; 1357 1358 #ifdef DEBUG 1359 if (ldebug(sched_setscheduler)) 1360 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1361 args->pid, args->policy, (const void *)args->param); 1362 #endif 1363 1364 switch (args->policy) { 1365 case LINUX_SCHED_OTHER: 1366 bsd.policy = SCHED_OTHER; 1367 break; 1368 case LINUX_SCHED_FIFO: 1369 bsd.policy = SCHED_FIFO; 1370 break; 1371 case LINUX_SCHED_RR: 1372 bsd.policy = SCHED_RR; 1373 break; 1374 default: 1375 return EINVAL; 1376 } 1377 1378 bsd.pid = args->pid; 1379 bsd.param = (struct sched_param *)args->param; 1380 return sched_setscheduler(td, &bsd); 1381 } 1382 1383 int 1384 linux_sched_getscheduler(struct thread *td, 1385 struct linux_sched_getscheduler_args *args) 1386 { 1387 struct sched_getscheduler_args bsd; 1388 int error; 1389 1390 #ifdef DEBUG 1391 if (ldebug(sched_getscheduler)) 1392 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1393 #endif 1394 1395 bsd.pid = args->pid; 1396 error = sched_getscheduler(td, &bsd); 1397 1398 switch (td->td_retval[0]) { 1399 case SCHED_OTHER: 1400 td->td_retval[0] = LINUX_SCHED_OTHER; 1401 break; 1402 case SCHED_FIFO: 1403 td->td_retval[0] = LINUX_SCHED_FIFO; 1404 break; 1405 case SCHED_RR: 1406 td->td_retval[0] = LINUX_SCHED_RR; 1407 break; 1408 } 1409 1410 return error; 1411 } 1412 1413 int 1414 linux_sched_get_priority_max(struct thread *td, 1415 struct linux_sched_get_priority_max_args *args) 1416 { 1417 struct sched_get_priority_max_args bsd; 1418 1419 #ifdef DEBUG 1420 if (ldebug(sched_get_priority_max)) 1421 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1422 #endif 1423 1424 switch (args->policy) { 1425 case LINUX_SCHED_OTHER: 1426 bsd.policy = SCHED_OTHER; 1427 break; 1428 case LINUX_SCHED_FIFO: 1429 bsd.policy = SCHED_FIFO; 1430 break; 1431 case LINUX_SCHED_RR: 1432 bsd.policy = SCHED_RR; 1433 break; 1434 default: 1435 return EINVAL; 1436 } 1437 return sched_get_priority_max(td, &bsd); 1438 } 1439 1440 int 1441 linux_sched_get_priority_min(struct thread *td, 1442 struct linux_sched_get_priority_min_args *args) 1443 { 1444 struct sched_get_priority_min_args bsd; 1445 1446 #ifdef DEBUG 1447 if (ldebug(sched_get_priority_min)) 1448 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1449 #endif 1450 1451 switch (args->policy) { 1452 case LINUX_SCHED_OTHER: 1453 bsd.policy = SCHED_OTHER; 1454 break; 1455 case LINUX_SCHED_FIFO: 1456 bsd.policy = SCHED_FIFO; 1457 break; 1458 case LINUX_SCHED_RR: 1459 bsd.policy = SCHED_RR; 1460 break; 1461 default: 1462 return EINVAL; 1463 } 1464 return sched_get_priority_min(td, &bsd); 1465 } 1466 1467 #define REBOOT_CAD_ON 0x89abcdef 1468 #define REBOOT_CAD_OFF 0 1469 #define REBOOT_HALT 0xcdef0123 1470 #define REBOOT_RESTART 0x01234567 1471 #define REBOOT_RESTART2 0xA1B2C3D4 1472 #define REBOOT_POWEROFF 0x4321FEDC 1473 #define REBOOT_MAGIC1 0xfee1dead 1474 #define REBOOT_MAGIC2 0x28121969 1475 #define REBOOT_MAGIC2A 0x05121996 1476 #define REBOOT_MAGIC2B 0x16041998 1477 1478 int 1479 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1480 { 1481 struct reboot_args bsd_args; 1482 1483 #ifdef DEBUG 1484 if (ldebug(reboot)) 1485 printf(ARGS(reboot, "0x%x"), args->cmd); 1486 #endif 1487 1488 if (args->magic1 != REBOOT_MAGIC1) 1489 return EINVAL; 1490 1491 switch (args->magic2) { 1492 case REBOOT_MAGIC2: 1493 case REBOOT_MAGIC2A: 1494 case REBOOT_MAGIC2B: 1495 break; 1496 default: 1497 return EINVAL; 1498 } 1499 1500 switch (args->cmd) { 1501 case REBOOT_CAD_ON: 1502 case REBOOT_CAD_OFF: 1503 return (priv_check(td, PRIV_REBOOT)); 1504 case REBOOT_HALT: 1505 bsd_args.opt = RB_HALT; 1506 break; 1507 case REBOOT_RESTART: 1508 case REBOOT_RESTART2: 1509 bsd_args.opt = 0; 1510 break; 1511 case REBOOT_POWEROFF: 1512 bsd_args.opt = RB_POWEROFF; 1513 break; 1514 default: 1515 return EINVAL; 1516 } 1517 return reboot(td, &bsd_args); 1518 } 1519 1520 1521 /* 1522 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1523 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1524 * are assumed to be preserved. The following lightweight syscalls fixes 1525 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1526 * 1527 * linux_getpid() - MP SAFE 1528 * linux_getgid() - MP SAFE 1529 * linux_getuid() - MP SAFE 1530 */ 1531 1532 int 1533 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1534 { 1535 struct linux_emuldata *em; 1536 1537 #ifdef DEBUG 1538 if (ldebug(getpid)) 1539 printf(ARGS(getpid, "")); 1540 #endif 1541 1542 if (linux_use26(td)) { 1543 em = em_find(td->td_proc, EMUL_DONTLOCK); 1544 KASSERT(em != NULL, ("getpid: emuldata not found.\n")); 1545 td->td_retval[0] = em->shared->group_pid; 1546 } else { 1547 td->td_retval[0] = td->td_proc->p_pid; 1548 } 1549 1550 return (0); 1551 } 1552 1553 int 1554 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1555 { 1556 1557 #ifdef DEBUG 1558 if (ldebug(gettid)) 1559 printf(ARGS(gettid, "")); 1560 #endif 1561 1562 td->td_retval[0] = td->td_proc->p_pid; 1563 return (0); 1564 } 1565 1566 1567 int 1568 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1569 { 1570 struct linux_emuldata *em; 1571 struct proc *p, *pp; 1572 1573 #ifdef DEBUG 1574 if (ldebug(getppid)) 1575 printf(ARGS(getppid, "")); 1576 #endif 1577 1578 if (!linux_use26(td)) { 1579 PROC_LOCK(td->td_proc); 1580 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1581 PROC_UNLOCK(td->td_proc); 1582 return (0); 1583 } 1584 1585 em = em_find(td->td_proc, EMUL_DONTLOCK); 1586 1587 KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); 1588 1589 /* find the group leader */ 1590 p = pfind(em->shared->group_pid); 1591 1592 if (p == NULL) { 1593 #ifdef DEBUG 1594 printf(LMSG("parent process not found.\n")); 1595 #endif 1596 return (0); 1597 } 1598 1599 pp = p->p_pptr; /* switch to parent */ 1600 PROC_LOCK(pp); 1601 PROC_UNLOCK(p); 1602 1603 /* if its also linux process */ 1604 if (pp->p_sysent == &elf_linux_sysvec) { 1605 em = em_find(pp, EMUL_DONTLOCK); 1606 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); 1607 1608 td->td_retval[0] = em->shared->group_pid; 1609 } else 1610 td->td_retval[0] = pp->p_pid; 1611 1612 PROC_UNLOCK(pp); 1613 1614 return (0); 1615 } 1616 1617 int 1618 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1619 { 1620 1621 #ifdef DEBUG 1622 if (ldebug(getgid)) 1623 printf(ARGS(getgid, "")); 1624 #endif 1625 1626 td->td_retval[0] = td->td_ucred->cr_rgid; 1627 return (0); 1628 } 1629 1630 int 1631 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1632 { 1633 1634 #ifdef DEBUG 1635 if (ldebug(getuid)) 1636 printf(ARGS(getuid, "")); 1637 #endif 1638 1639 td->td_retval[0] = td->td_ucred->cr_ruid; 1640 return (0); 1641 } 1642 1643 1644 int 1645 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1646 { 1647 struct getsid_args bsd; 1648 1649 #ifdef DEBUG 1650 if (ldebug(getsid)) 1651 printf(ARGS(getsid, "%i"), args->pid); 1652 #endif 1653 1654 bsd.pid = args->pid; 1655 return getsid(td, &bsd); 1656 } 1657 1658 int 1659 linux_nosys(struct thread *td, struct nosys_args *ignore) 1660 { 1661 1662 return (ENOSYS); 1663 } 1664 1665 int 1666 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1667 { 1668 struct getpriority_args bsd_args; 1669 int error; 1670 1671 #ifdef DEBUG 1672 if (ldebug(getpriority)) 1673 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1674 #endif 1675 1676 bsd_args.which = args->which; 1677 bsd_args.who = args->who; 1678 error = getpriority(td, &bsd_args); 1679 td->td_retval[0] = 20 - td->td_retval[0]; 1680 return error; 1681 } 1682 1683 int 1684 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1685 { 1686 int name[2]; 1687 1688 #ifdef DEBUG 1689 if (ldebug(sethostname)) 1690 printf(ARGS(sethostname, "*, %i"), args->len); 1691 #endif 1692 1693 name[0] = CTL_KERN; 1694 name[1] = KERN_HOSTNAME; 1695 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1696 args->len, 0, 0)); 1697 } 1698 1699 int 1700 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1701 { 1702 struct linux_emuldata *em, *td_em, *tmp_em; 1703 struct proc *sp; 1704 1705 #ifdef DEBUG 1706 if (ldebug(exit_group)) 1707 printf(ARGS(exit_group, "%i"), args->error_code); 1708 #endif 1709 1710 if (linux_use26(td)) { 1711 td_em = em_find(td->td_proc, EMUL_DONTLOCK); 1712 1713 KASSERT(td_em != NULL, ("exit_group: emuldata not found.\n")); 1714 1715 EMUL_SHARED_RLOCK(&emul_shared_lock); 1716 LIST_FOREACH_SAFE(em, &td_em->shared->threads, threads, tmp_em) { 1717 if (em->pid == td_em->pid) 1718 continue; 1719 1720 sp = pfind(em->pid); 1721 psignal(sp, SIGKILL); 1722 PROC_UNLOCK(sp); 1723 #ifdef DEBUG 1724 printf(LMSG("linux_sys_exit_group: kill PID %d\n"), em->pid); 1725 #endif 1726 } 1727 1728 EMUL_SHARED_RUNLOCK(&emul_shared_lock); 1729 } 1730 /* 1731 * XXX: we should send a signal to the parent if 1732 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1733 * as it doesnt occur often. 1734 */ 1735 exit1(td, W_EXITCODE(args->error_code, 0)); 1736 1737 return (0); 1738 } 1739 1740 int 1741 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1742 { 1743 int error = 0, max_size; 1744 struct proc *p = td->td_proc; 1745 char comm[LINUX_MAX_COMM_LEN]; 1746 struct linux_emuldata *em; 1747 int pdeath_signal; 1748 1749 #ifdef DEBUG 1750 if (ldebug(prctl)) 1751 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, 1752 args->arg2, args->arg3, args->arg4, args->arg5); 1753 #endif 1754 1755 switch (args->option) { 1756 case LINUX_PR_SET_PDEATHSIG: 1757 if (!LINUX_SIG_VALID(args->arg2)) 1758 return (EINVAL); 1759 em = em_find(p, EMUL_DOLOCK); 1760 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1761 em->pdeath_signal = args->arg2; 1762 EMUL_UNLOCK(&emul_lock); 1763 break; 1764 case LINUX_PR_GET_PDEATHSIG: 1765 em = em_find(p, EMUL_DOLOCK); 1766 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1767 pdeath_signal = em->pdeath_signal; 1768 EMUL_UNLOCK(&emul_lock); 1769 error = copyout(&pdeath_signal, 1770 (void *)(register_t)args->arg2, 1771 sizeof(pdeath_signal)); 1772 break; 1773 case LINUX_PR_SET_NAME: 1774 /* 1775 * To be on the safe side we need to make sure to not 1776 * overflow the size a linux program expects. We already 1777 * do this here in the copyin, so that we don't need to 1778 * check on copyout. 1779 */ 1780 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1781 error = copyinstr((void *)(register_t)args->arg2, comm, 1782 max_size, NULL); 1783 1784 /* Linux silently truncates the name if it is too long. */ 1785 if (error == ENAMETOOLONG) { 1786 /* 1787 * XXX: copyinstr() isn't documented to populate the 1788 * array completely, so do a copyin() to be on the 1789 * safe side. This should be changed in case 1790 * copyinstr() is changed to guarantee this. 1791 */ 1792 error = copyin((void *)(register_t)args->arg2, comm, 1793 max_size - 1); 1794 comm[max_size - 1] = '\0'; 1795 } 1796 if (error) 1797 return (error); 1798 1799 PROC_LOCK(p); 1800 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1801 PROC_UNLOCK(p); 1802 break; 1803 case LINUX_PR_GET_NAME: 1804 PROC_LOCK(p); 1805 strlcpy(comm, p->p_comm, sizeof(comm)); 1806 PROC_UNLOCK(p); 1807 error = copyout(comm, (void *)(register_t)args->arg2, 1808 strlen(comm) + 1); 1809 break; 1810 default: 1811 error = EINVAL; 1812 break; 1813 } 1814 1815 return (error); 1816 } 1817 1818 /* 1819 * Get affinity of a process. 1820 */ 1821 int 1822 linux_sched_getaffinity(struct thread *td, 1823 struct linux_sched_getaffinity_args *args) 1824 { 1825 int error; 1826 struct cpuset_getaffinity_args cga; 1827 1828 #ifdef DEBUG 1829 if (ldebug(sched_getaffinity)) 1830 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 1831 args->len); 1832 #endif 1833 1834 cga.level = CPU_LEVEL_WHICH; 1835 cga.which = CPU_WHICH_PID; 1836 cga.id = args->pid; 1837 cga.cpusetsize = sizeof(cpumask_t); 1838 cga.mask = (cpuset_t *) args->user_mask_ptr; 1839 1840 if ((error = cpuset_getaffinity(td, &cga)) == 0) 1841 td->td_retval[0] = sizeof(cpumask_t); 1842 1843 return (error); 1844 } 1845 1846 /* 1847 * Set affinity of a process. 1848 */ 1849 int 1850 linux_sched_setaffinity(struct thread *td, 1851 struct linux_sched_setaffinity_args *args) 1852 { 1853 struct cpuset_setaffinity_args csa; 1854 1855 #ifdef DEBUG 1856 if (ldebug(sched_setaffinity)) 1857 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 1858 args->len); 1859 #endif 1860 csa.level = CPU_LEVEL_WHICH; 1861 csa.which = CPU_WHICH_PID; 1862 csa.id = args->pid; 1863 csa.cpusetsize = args->len; 1864 csa.mask = (cpuset_t *) args->user_mask_ptr; 1865 1866 return (cpuset_setaffinity(td, &csa)); 1867 } 1868