linux_misc.c revision 113613
1/*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/compat/linux/linux_misc.c 113613 2003-04-17 22:02:47Z jhb $ 29 */ 30 31#include "opt_mac.h" 32 33#include <sys/param.h> 34#include <sys/blist.h> 35#include <sys/fcntl.h> 36#include <sys/imgact_aout.h> 37#include <sys/jail.h> 38#include <sys/kernel.h> 39#include <sys/lock.h> 40#include <sys/mac.h> 41#include <sys/malloc.h> 42#include <sys/mman.h> 43#include <sys/mount.h> 44#include <sys/mutex.h> 45#include <sys/namei.h> 46#include <sys/proc.h> 47#include <sys/reboot.h> 48#include <sys/resourcevar.h> 49#include <sys/signalvar.h> 50#include <sys/stat.h> 51#include <sys/syscallsubr.h> 52#include <sys/sysctl.h> 53#include <sys/sysproto.h> 54#include <sys/systm.h> 55#include <sys/time.h> 56#include <sys/vmmeter.h> 57#include <sys/vnode.h> 58#include <sys/wait.h> 59 60#include <vm/vm.h> 61#include <vm/pmap.h> 62#include <vm/vm_kern.h> 63#include <vm/vm_map.h> 64#include <vm/vm_extern.h> 65#include <vm/vm_object.h> 66#include <vm/swap_pager.h> 67 68#include <machine/limits.h> 69 70#include <posix4/sched.h> 71 72#include <machine/../linux/linux.h> 73#include <machine/../linux/linux_proto.h> 74 75#include <compat/linux/linux_mib.h> 76#include <compat/linux/linux_util.h> 77 78#ifdef __alpha__ 79#define BSD_TO_LINUX_SIGNAL(sig) (sig) 80#else 81#define BSD_TO_LINUX_SIGNAL(sig) \ 82 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 83#endif 84 85#ifndef __alpha__ 86static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 87 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 88 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 89 RLIMIT_MEMLOCK, -1 90}; 91#endif /*!__alpha__*/ 92 93struct l_sysinfo { 94 l_long uptime; /* Seconds since boot */ 95 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 96 l_ulong totalram; /* Total usable main memory size */ 97 l_ulong freeram; /* Available memory size */ 98 l_ulong sharedram; /* Amount of shared memory */ 99 l_ulong bufferram; /* Memory used by buffers */ 100 l_ulong totalswap; /* Total swap space size */ 101 l_ulong freeswap; /* swap space still available */ 102 l_ushort procs; /* Number of current processes */ 103 char _f[22]; /* Pads structure to 64 bytes */ 104}; 105#ifndef __alpha__ 106int 107linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 108{ 109 struct l_sysinfo sysinfo; 110 vm_object_t object; 111 int i; 112 struct timespec ts; 113 114 /* Uptime is copied out of print_uptime() in kern_shutdown.c */ 115 getnanouptime(&ts); 116 i = 0; 117 if (ts.tv_sec >= 86400) { 118 ts.tv_sec %= 86400; 119 i = 1; 120 } 121 if (i || ts.tv_sec >= 3600) { 122 ts.tv_sec %= 3600; 123 i = 1; 124 } 125 if (i || ts.tv_sec >= 60) { 126 ts.tv_sec %= 60; 127 i = 1; 128 } 129 sysinfo.uptime=ts.tv_sec; 130 131 /* Use the information from the mib to get our load averages */ 132 for (i = 0; i < 3; i++) 133 sysinfo.loads[i] = averunnable.ldavg[i]; 134 135 sysinfo.totalram = physmem * PAGE_SIZE; 136 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 137 138 sysinfo.sharedram = 0; 139 for (object = TAILQ_FIRST(&vm_object_list); object != NULL; 140 object = TAILQ_NEXT(object, object_list)) 141 if (object->shadow_count > 1) 142 sysinfo.sharedram += object->resident_page_count; 143 144 sysinfo.sharedram *= PAGE_SIZE; 145 sysinfo.bufferram = 0; 146 147 if (swapblist == NULL) { 148 sysinfo.totalswap= 0; 149 sysinfo.freeswap = 0; 150 } else { 151 sysinfo.totalswap = swapblist->bl_blocks * 1024; 152 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE; 153 } 154 155 sysinfo.procs = 20; /* Hack */ 156 157 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 158} 159#endif /*!__alpha__*/ 160 161#ifndef __alpha__ 162int 163linux_alarm(struct thread *td, struct linux_alarm_args *args) 164{ 165 struct itimerval it, old_it; 166 struct timeval tv; 167 struct proc *p; 168 169#ifdef DEBUG 170 if (ldebug(alarm)) 171 printf(ARGS(alarm, "%u"), args->secs); 172#endif 173 174 if (args->secs > 100000000) 175 return EINVAL; 176 177 it.it_value.tv_sec = (long)args->secs; 178 it.it_value.tv_usec = 0; 179 it.it_interval.tv_sec = 0; 180 it.it_interval.tv_usec = 0; 181 p = td->td_proc; 182 PROC_LOCK(p); 183 old_it = p->p_realtimer; 184 getmicrouptime(&tv); 185 if (timevalisset(&old_it.it_value)) 186 callout_stop(&p->p_itcallout); 187 if (it.it_value.tv_sec != 0) { 188 callout_reset(&p->p_itcallout, tvtohz(&it.it_value), 189 realitexpire, p); 190 timevaladd(&it.it_value, &tv); 191 } 192 p->p_realtimer = it; 193 PROC_UNLOCK(p); 194 if (timevalcmp(&old_it.it_value, &tv, >)) { 195 timevalsub(&old_it.it_value, &tv); 196 if (old_it.it_value.tv_usec != 0) 197 old_it.it_value.tv_sec++; 198 td->td_retval[0] = old_it.it_value.tv_sec; 199 } 200 return 0; 201} 202#endif /*!__alpha__*/ 203 204int 205linux_brk(struct thread *td, struct linux_brk_args *args) 206{ 207 struct vmspace *vm = td->td_proc->p_vmspace; 208 vm_offset_t new, old; 209 struct obreak_args /* { 210 char * nsize; 211 } */ tmp; 212 213#ifdef DEBUG 214 if (ldebug(brk)) 215 printf(ARGS(brk, "%p"), (void *)args->dsend); 216#endif 217 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 218 new = (vm_offset_t)args->dsend; 219 tmp.nsize = (char *) new; 220 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 221 td->td_retval[0] = (long)new; 222 else 223 td->td_retval[0] = (long)old; 224 225 return 0; 226} 227 228int 229linux_uselib(struct thread *td, struct linux_uselib_args *args) 230{ 231 struct nameidata ni; 232 struct vnode *vp; 233 struct exec *a_out; 234 struct vattr attr; 235 vm_offset_t vmaddr; 236 unsigned long file_offset; 237 vm_offset_t buffer; 238 unsigned long bss_size; 239 char *library; 240 int error; 241 int locked; 242 243 LCONVPATHEXIST(td, args->library, &library); 244 245#ifdef DEBUG 246 if (ldebug(uselib)) 247 printf(ARGS(uselib, "%s"), library); 248#endif 249 250 a_out = NULL; 251 locked = 0; 252 vp = NULL; 253 254 /* 255 * XXX: This code should make use of vn_open(), rather than doing 256 * all this stuff itself. 257 */ 258 NDINIT(&ni, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, library, td); 259 error = namei(&ni); 260 LFREEPATH(library); 261 if (error) 262 goto cleanup; 263 264 vp = ni.ni_vp; 265 /* 266 * XXX - This looks like a bogus check. A LOCKLEAF namei should not 267 * succeed without returning a vnode. 268 */ 269 if (vp == NULL) { 270 error = ENOEXEC; /* ?? */ 271 goto cleanup; 272 } 273 NDFREE(&ni, NDF_ONLY_PNBUF); 274 275 /* 276 * From here on down, we have a locked vnode that must be unlocked. 277 */ 278 locked++; 279 280 /* Writable? */ 281 if (vp->v_writecount) { 282 error = ETXTBSY; 283 goto cleanup; 284 } 285 286 /* Executable? */ 287 error = VOP_GETATTR(vp, &attr, td->td_ucred, td); 288 if (error) 289 goto cleanup; 290 291 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 292 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 293 error = ENOEXEC; 294 goto cleanup; 295 } 296 297 /* Sensible size? */ 298 if (attr.va_size == 0) { 299 error = ENOEXEC; 300 goto cleanup; 301 } 302 303 /* Can we access it? */ 304 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 305 if (error) 306 goto cleanup; 307 308 /* 309 * XXX: This should use vn_open() so that it is properly authorized, 310 * and to reduce code redundancy all over the place here. 311 */ 312#ifdef MAC 313 error = mac_check_vnode_open(td->td_ucred, vp, FREAD); 314 if (error) 315 goto cleanup; 316#endif 317 error = VOP_OPEN(vp, FREAD, td->td_ucred, td); 318 if (error) 319 goto cleanup; 320 321 /* Pull in executable header into kernel_map */ 322 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 323 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 324 /* 325 * Lock no longer needed 326 */ 327 locked = 0; 328 VOP_UNLOCK(vp, 0, td); 329 330 if (error) 331 goto cleanup; 332 333 /* Is it a Linux binary ? */ 334 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 335 error = ENOEXEC; 336 goto cleanup; 337 } 338 339 /* 340 * While we are here, we should REALLY do some more checks 341 */ 342 343 /* Set file/virtual offset based on a.out variant. */ 344 switch ((int)(a_out->a_magic & 0xffff)) { 345 case 0413: /* ZMAGIC */ 346 file_offset = 1024; 347 break; 348 case 0314: /* QMAGIC */ 349 file_offset = 0; 350 break; 351 default: 352 error = ENOEXEC; 353 goto cleanup; 354 } 355 356 bss_size = round_page(a_out->a_bss); 357 358 /* Check various fields in header for validity/bounds. */ 359 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 360 error = ENOEXEC; 361 goto cleanup; 362 } 363 364 /* text + data can't exceed file size */ 365 if (a_out->a_data + a_out->a_text > attr.va_size) { 366 error = EFAULT; 367 goto cleanup; 368 } 369 370 /* To protect td->td_proc->p_rlimit in the if condition. */ 371 mtx_assert(&Giant, MA_OWNED); 372 373 /* 374 * text/data/bss must not exceed limits 375 * XXX - this is not complete. it should check current usage PLUS 376 * the resources needed by this library. 377 */ 378 if (a_out->a_text > maxtsiz || 379 a_out->a_data + bss_size > 380 td->td_proc->p_rlimit[RLIMIT_DATA].rlim_cur) { 381 error = ENOMEM; 382 goto cleanup; 383 } 384 385 mp_fixme("Unlocked vflags access."); 386 /* prevent more writers */ 387 vp->v_vflag |= VV_TEXT; 388 389 /* 390 * Check if file_offset page aligned. Currently we cannot handle 391 * misalinged file offsets, and so we read in the entire image 392 * (what a waste). 393 */ 394 if (file_offset & PAGE_MASK) { 395#ifdef DEBUG 396 printf("uselib: Non page aligned binary %lu\n", file_offset); 397#endif 398 /* Map text+data read/write/execute */ 399 400 /* a_entry is the load address and is page aligned */ 401 vmaddr = trunc_page(a_out->a_entry); 402 403 /* get anon user mapping, read+write+execute */ 404 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 405 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 406 VM_PROT_ALL, 0); 407 if (error) 408 goto cleanup; 409 410 /* map file into kernel_map */ 411 error = vm_mmap(kernel_map, &buffer, 412 round_page(a_out->a_text + a_out->a_data + file_offset), 413 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 414 trunc_page(file_offset)); 415 if (error) 416 goto cleanup; 417 418 /* copy from kernel VM space to user space */ 419 error = copyout((void *)(buffer + file_offset), 420 (void *)vmaddr, a_out->a_text + a_out->a_data); 421 422 /* release temporary kernel space */ 423 vm_map_remove(kernel_map, buffer, buffer + 424 round_page(a_out->a_text + a_out->a_data + file_offset)); 425 426 if (error) 427 goto cleanup; 428 } else { 429#ifdef DEBUG 430 printf("uselib: Page aligned binary %lu\n", file_offset); 431#endif 432 /* 433 * for QMAGIC, a_entry is 20 bytes beyond the load address 434 * to skip the executable header 435 */ 436 vmaddr = trunc_page(a_out->a_entry); 437 438 /* 439 * Map it all into the process's space as a single 440 * copy-on-write "data" segment. 441 */ 442 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 443 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 444 MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset); 445 if (error) 446 goto cleanup; 447 } 448#ifdef DEBUG 449 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0], 450 ((long*)vmaddr)[1]); 451#endif 452 if (bss_size != 0) { 453 /* Calculate BSS start address */ 454 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 455 a_out->a_data; 456 457 /* allocate some 'anon' space */ 458 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 459 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 460 if (error) 461 goto cleanup; 462 } 463 464cleanup: 465 /* Unlock vnode if needed */ 466 if (locked) 467 VOP_UNLOCK(vp, 0, td); 468 469 /* Release the kernel mapping. */ 470 if (a_out) 471 vm_map_remove(kernel_map, (vm_offset_t)a_out, 472 (vm_offset_t)a_out + PAGE_SIZE); 473 474 return error; 475} 476 477int 478linux_select(struct thread *td, struct linux_select_args *args) 479{ 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, &utv, sizeof(utv)))) 496 goto select_out; 497#ifdef DEBUG 498 if (ldebug(select)) 499 printf(LMSG("incoming timeout (%ld/%ld)"), 500 utv.tv_sec, utv.tv_usec); 501#endif 502 503 if (itimerfix(&utv)) { 504 /* 505 * The timeval was invalid. Convert it to something 506 * valid that will act as it does under Linux. 507 */ 508 utv.tv_sec += utv.tv_usec / 1000000; 509 utv.tv_usec %= 1000000; 510 if (utv.tv_usec < 0) { 511 utv.tv_sec -= 1; 512 utv.tv_usec += 1000000; 513 } 514 if (utv.tv_sec < 0) 515 timevalclear(&utv); 516 } 517 microtime(&tv0); 518 tvp = &utv; 519 } else 520 tvp = NULL; 521 522 error = kern_select(td, args->nfds, args->readfds, args->writefds, 523 args->exceptfds, tvp); 524 525#ifdef DEBUG 526 if (ldebug(select)) 527 printf(LMSG("real select returns %d"), error); 528#endif 529 if (error) { 530 /* 531 * See fs/select.c in the Linux kernel. Without this, 532 * Maelstrom doesn't work. 533 */ 534 if (error == ERESTART) 535 error = EINTR; 536 goto select_out; 537 } 538 539 if (args->timeout) { 540 if (td->td_retval[0]) { 541 /* 542 * Compute how much time was left of the timeout, 543 * by subtracting the current time and the time 544 * before we started the call, and subtracting 545 * that result from the user-supplied value. 546 */ 547 microtime(&tv1); 548 timevalsub(&tv1, &tv0); 549 timevalsub(&utv, &tv1); 550 if (utv.tv_sec < 0) 551 timevalclear(&utv); 552 } else 553 timevalclear(&utv); 554#ifdef DEBUG 555 if (ldebug(select)) 556 printf(LMSG("outgoing timeout (%ld/%ld)"), 557 utv.tv_sec, utv.tv_usec); 558#endif 559 if ((error = copyout(&utv, args->timeout, sizeof(utv)))) 560 goto select_out; 561 } 562 563select_out: 564#ifdef DEBUG 565 if (ldebug(select)) 566 printf(LMSG("select_out -> %d"), error); 567#endif 568 return error; 569} 570 571int 572linux_mremap(struct thread *td, struct linux_mremap_args *args) 573{ 574 struct munmap_args /* { 575 void *addr; 576 size_t len; 577 } */ bsd_args; 578 int error = 0; 579 580#ifdef DEBUG 581 if (ldebug(mremap)) 582 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 583 (void *)args->addr, 584 (unsigned long)args->old_len, 585 (unsigned long)args->new_len, 586 (unsigned long)args->flags); 587#endif 588 args->new_len = round_page(args->new_len); 589 args->old_len = round_page(args->old_len); 590 591 if (args->new_len > args->old_len) { 592 td->td_retval[0] = 0; 593 return ENOMEM; 594 } 595 596 if (args->new_len < args->old_len) { 597 bsd_args.addr = (caddr_t)(args->addr + args->new_len); 598 bsd_args.len = args->old_len - args->new_len; 599 error = munmap(td, &bsd_args); 600 } 601 602 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 603 return error; 604} 605 606#define LINUX_MS_ASYNC 0x0001 607#define LINUX_MS_INVALIDATE 0x0002 608#define LINUX_MS_SYNC 0x0004 609 610int 611linux_msync(struct thread *td, struct linux_msync_args *args) 612{ 613 struct msync_args bsd_args; 614 615 bsd_args.addr = (caddr_t)args->addr; 616 bsd_args.len = args->len; 617 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 618 619 return msync(td, &bsd_args); 620} 621 622#ifndef __alpha__ 623int 624linux_time(struct thread *td, struct linux_time_args *args) 625{ 626 struct timeval tv; 627 l_time_t tm; 628 int error; 629 630#ifdef DEBUG 631 if (ldebug(time)) 632 printf(ARGS(time, "*")); 633#endif 634 635 microtime(&tv); 636 tm = tv.tv_sec; 637 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 638 return error; 639 td->td_retval[0] = tm; 640 return 0; 641} 642#endif /*!__alpha__*/ 643 644struct l_times_argv { 645 l_long tms_utime; 646 l_long tms_stime; 647 l_long tms_cutime; 648 l_long tms_cstime; 649}; 650 651#ifdef __alpha__ 652#define CLK_TCK 1024 /* Linux uses 1024 on alpha */ 653#else 654#define CLK_TCK 100 /* Linux uses 100 */ 655#endif 656 657#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 658 659int 660linux_times(struct thread *td, struct linux_times_args *args) 661{ 662 struct timeval tv; 663 struct l_times_argv tms; 664 struct rusage ru; 665 int error; 666 667#ifdef DEBUG 668 if (ldebug(times)) 669 printf(ARGS(times, "*")); 670#endif 671 672 mtx_lock_spin(&sched_lock); 673 calcru(td->td_proc, &ru.ru_utime, &ru.ru_stime, NULL); 674 mtx_unlock_spin(&sched_lock); 675 676 tms.tms_utime = CONVTCK(ru.ru_utime); 677 tms.tms_stime = CONVTCK(ru.ru_stime); 678 679 tms.tms_cutime = CONVTCK(td->td_proc->p_stats->p_cru.ru_utime); 680 tms.tms_cstime = CONVTCK(td->td_proc->p_stats->p_cru.ru_stime); 681 682 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 683 return error; 684 685 microuptime(&tv); 686 td->td_retval[0] = (int)CONVTCK(tv); 687 return 0; 688} 689 690int 691linux_newuname(struct thread *td, struct linux_newuname_args *args) 692{ 693 struct l_new_utsname utsname; 694 char osname[LINUX_MAX_UTSNAME]; 695 char osrelease[LINUX_MAX_UTSNAME]; 696 697#ifdef DEBUG 698 if (ldebug(newuname)) 699 printf(ARGS(newuname, "*")); 700#endif 701 702 linux_get_osname(td, osname); 703 linux_get_osrelease(td, osrelease); 704 705 bzero(&utsname, sizeof(utsname)); 706 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 707 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 708 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 709 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 710 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 711 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 712 713 return (copyout(&utsname, args->buf, sizeof(utsname))); 714} 715 716#if defined(__i386__) 717struct l_utimbuf { 718 l_time_t l_actime; 719 l_time_t l_modtime; 720}; 721 722int 723linux_utime(struct thread *td, struct linux_utime_args *args) 724{ 725 struct timeval tv[2], *tvp; 726 struct l_utimbuf lut; 727 char *fname; 728 int error; 729 730 LCONVPATHEXIST(td, args->fname, &fname); 731 732#ifdef DEBUG 733 if (ldebug(utime)) 734 printf(ARGS(utime, "%s, *"), fname); 735#endif 736 737 if (args->times) { 738 if ((error = copyin(args->times, &lut, sizeof lut))) { 739 LFREEPATH(fname); 740 return error; 741 } 742 tv[0].tv_sec = lut.l_actime; 743 tv[0].tv_usec = 0; 744 tv[1].tv_sec = lut.l_modtime; 745 tv[1].tv_usec = 0; 746 tvp = tv; 747 } else 748 tvp = NULL; 749 750 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 751 LFREEPATH(fname); 752 return (error); 753} 754#endif /* __i386__ */ 755 756#define __WCLONE 0x80000000 757 758#ifndef __alpha__ 759int 760linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 761{ 762 struct wait_args /* { 763 int pid; 764 int *status; 765 int options; 766 struct rusage *rusage; 767 } */ tmp; 768 int error, tmpstat; 769 770#ifdef DEBUG 771 if (ldebug(waitpid)) 772 printf(ARGS(waitpid, "%d, %p, %d"), 773 args->pid, (void *)args->status, args->options); 774#endif 775 776 tmp.pid = args->pid; 777 tmp.status = args->status; 778 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 779 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 780 if (args->options & __WCLONE) 781 tmp.options |= WLINUXCLONE; 782 tmp.rusage = NULL; 783 784 if ((error = wait4(td, &tmp)) != 0) 785 return error; 786 787 if (args->status) { 788 if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0) 789 return error; 790 tmpstat &= 0xffff; 791 if (WIFSIGNALED(tmpstat)) 792 tmpstat = (tmpstat & 0xffffff80) | 793 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 794 else if (WIFSTOPPED(tmpstat)) 795 tmpstat = (tmpstat & 0xffff00ff) | 796 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 797 return copyout(&tmpstat, args->status, sizeof(int)); 798 } 799 800 return 0; 801} 802#endif /*!__alpha__*/ 803 804int 805linux_wait4(struct thread *td, struct linux_wait4_args *args) 806{ 807 struct wait_args /* { 808 int pid; 809 int *status; 810 int options; 811 struct rusage *rusage; 812 } */ tmp; 813 int error, tmpstat; 814 struct proc *p; 815 816#ifdef DEBUG 817 if (ldebug(wait4)) 818 printf(ARGS(wait4, "%d, %p, %d, %p"), 819 args->pid, (void *)args->status, args->options, 820 (void *)args->rusage); 821#endif 822 823 tmp.pid = args->pid; 824 tmp.status = args->status; 825 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 826 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 827 if (args->options & __WCLONE) 828 tmp.options |= WLINUXCLONE; 829 tmp.rusage = (struct rusage *)args->rusage; 830 831 if ((error = wait4(td, &tmp)) != 0) 832 return error; 833 834 p = td->td_proc; 835 PROC_LOCK(p); 836 SIGDELSET(p->p_siglist, SIGCHLD); 837 PROC_UNLOCK(p); 838 839 if (args->status) { 840 if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0) 841 return error; 842 tmpstat &= 0xffff; 843 if (WIFSIGNALED(tmpstat)) 844 tmpstat = (tmpstat & 0xffffff80) | 845 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 846 else if (WIFSTOPPED(tmpstat)) 847 tmpstat = (tmpstat & 0xffff00ff) | 848 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 849 return copyout(&tmpstat, args->status, sizeof(int)); 850 } 851 852 return 0; 853} 854 855int 856linux_mknod(struct thread *td, struct linux_mknod_args *args) 857{ 858 char *path; 859 int error; 860 861 LCONVPATHCREAT(td, args->path, &path); 862 863#ifdef DEBUG 864 if (ldebug(mknod)) 865 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 866#endif 867 868 if (args->mode & S_IFIFO) 869 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 870 else 871 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 872 args->dev); 873 LFREEPATH(path); 874 return (error); 875} 876 877/* 878 * UGH! This is just about the dumbest idea I've ever heard!! 879 */ 880int 881linux_personality(struct thread *td, struct linux_personality_args *args) 882{ 883#ifdef DEBUG 884 if (ldebug(personality)) 885 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 886#endif 887#ifndef __alpha__ 888 if (args->per != 0) 889 return EINVAL; 890#endif 891 892 /* Yes Jim, it's still a Linux... */ 893 td->td_retval[0] = 0; 894 return 0; 895} 896 897/* 898 * Wrappers for get/setitimer for debugging.. 899 */ 900int 901linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 902{ 903 struct setitimer_args bsa; 904 struct itimerval foo; 905 int error; 906 907#ifdef DEBUG 908 if (ldebug(setitimer)) 909 printf(ARGS(setitimer, "%p, %p"), 910 (void *)args->itv, (void *)args->oitv); 911#endif 912 bsa.which = args->which; 913 bsa.itv = (struct itimerval *)args->itv; 914 bsa.oitv = (struct itimerval *)args->oitv; 915 if (args->itv) { 916 if ((error = copyin(args->itv, &foo, sizeof(foo)))) 917 return error; 918#ifdef DEBUG 919 if (ldebug(setitimer)) { 920 printf("setitimer: value: sec: %ld, usec: %ld\n", 921 foo.it_value.tv_sec, foo.it_value.tv_usec); 922 printf("setitimer: interval: sec: %ld, usec: %ld\n", 923 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 924 } 925#endif 926 } 927 return setitimer(td, &bsa); 928} 929 930int 931linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 932{ 933 struct getitimer_args bsa; 934#ifdef DEBUG 935 if (ldebug(getitimer)) 936 printf(ARGS(getitimer, "%p"), (void *)args->itv); 937#endif 938 bsa.which = args->which; 939 bsa.itv = (struct itimerval *)args->itv; 940 return getitimer(td, &bsa); 941} 942 943#ifndef __alpha__ 944int 945linux_nice(struct thread *td, struct linux_nice_args *args) 946{ 947 struct setpriority_args bsd_args; 948 949 bsd_args.which = PRIO_PROCESS; 950 bsd_args.who = 0; /* current process */ 951 bsd_args.prio = args->inc; 952 return setpriority(td, &bsd_args); 953} 954#endif /*!__alpha__*/ 955 956int 957linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 958{ 959 struct ucred *newcred, *oldcred; 960 l_gid_t linux_gidset[NGROUPS]; 961 gid_t *bsd_gidset; 962 int ngrp, error; 963 struct proc *p; 964 965 ngrp = args->gidsetsize; 966 if (ngrp >= NGROUPS) 967 return (EINVAL); 968 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 969 if (error) 970 return (error); 971 newcred = crget(); 972 p = td->td_proc; 973 PROC_LOCK(p); 974 oldcred = p->p_ucred; 975 976 /* 977 * cr_groups[0] holds egid. Setting the whole set from 978 * the supplied set will cause egid to be changed too. 979 * Keep cr_groups[0] unchanged to prevent that. 980 */ 981 982 if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0) { 983 PROC_UNLOCK(p); 984 crfree(newcred); 985 return (error); 986 } 987 988 crcopy(newcred, oldcred); 989 if (ngrp > 0) { 990 newcred->cr_ngroups = ngrp + 1; 991 992 bsd_gidset = newcred->cr_groups; 993 ngrp--; 994 while (ngrp >= 0) { 995 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 996 ngrp--; 997 } 998 } 999 else 1000 newcred->cr_ngroups = 1; 1001 1002 setsugid(p); 1003 p->p_ucred = newcred; 1004 PROC_UNLOCK(p); 1005 crfree(oldcred); 1006 return (0); 1007} 1008 1009int 1010linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1011{ 1012 struct ucred *cred; 1013 l_gid_t linux_gidset[NGROUPS]; 1014 gid_t *bsd_gidset; 1015 int bsd_gidsetsz, ngrp, error; 1016 1017 cred = td->td_ucred; 1018 bsd_gidset = cred->cr_groups; 1019 bsd_gidsetsz = cred->cr_ngroups - 1; 1020 1021 /* 1022 * cr_groups[0] holds egid. Returning the whole set 1023 * here will cause a duplicate. Exclude cr_groups[0] 1024 * to prevent that. 1025 */ 1026 1027 if ((ngrp = args->gidsetsize) == 0) { 1028 td->td_retval[0] = bsd_gidsetsz; 1029 return (0); 1030 } 1031 1032 if (ngrp < bsd_gidsetsz) 1033 return (EINVAL); 1034 1035 ngrp = 0; 1036 while (ngrp < bsd_gidsetsz) { 1037 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1038 ngrp++; 1039 } 1040 1041 if ((error = copyout(linux_gidset, args->grouplist, 1042 ngrp * sizeof(l_gid_t)))) 1043 return (error); 1044 1045 td->td_retval[0] = ngrp; 1046 return (0); 1047} 1048 1049#ifndef __alpha__ 1050int 1051linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1052{ 1053 struct rlimit bsd_rlim; 1054 struct l_rlimit rlim; 1055 u_int which; 1056 int error; 1057 1058#ifdef DEBUG 1059 if (ldebug(setrlimit)) 1060 printf(ARGS(setrlimit, "%d, %p"), 1061 args->resource, (void *)args->rlim); 1062#endif 1063 1064 if (args->resource >= LINUX_RLIM_NLIMITS) 1065 return (EINVAL); 1066 1067 which = linux_to_bsd_resource[args->resource]; 1068 if (which == -1) 1069 return (EINVAL); 1070 1071 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1072 if (error) 1073 return (error); 1074 1075 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1076 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1077 return (dosetrlimit(td, which, &bsd_rlim)); 1078} 1079 1080int 1081linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1082{ 1083 struct l_rlimit rlim; 1084 struct proc *p = td->td_proc; 1085 struct rlimit *bsd_rlp; 1086 u_int which; 1087 1088#ifdef DEBUG 1089 if (ldebug(old_getrlimit)) 1090 printf(ARGS(old_getrlimit, "%d, %p"), 1091 args->resource, (void *)args->rlim); 1092#endif 1093 1094 if (args->resource >= LINUX_RLIM_NLIMITS) 1095 return (EINVAL); 1096 1097 which = linux_to_bsd_resource[args->resource]; 1098 if (which == -1) 1099 return (EINVAL); 1100 bsd_rlp = &p->p_rlimit[which]; 1101 1102 rlim.rlim_cur = (unsigned long)bsd_rlp->rlim_cur; 1103 if (rlim.rlim_cur == ULONG_MAX) 1104 rlim.rlim_cur = LONG_MAX; 1105 rlim.rlim_max = (unsigned long)bsd_rlp->rlim_max; 1106 if (rlim.rlim_max == ULONG_MAX) 1107 rlim.rlim_max = LONG_MAX; 1108 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1109} 1110 1111int 1112linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1113{ 1114 struct l_rlimit rlim; 1115 struct proc *p = td->td_proc; 1116 struct rlimit *bsd_rlp; 1117 u_int which; 1118 1119#ifdef DEBUG 1120 if (ldebug(getrlimit)) 1121 printf(ARGS(getrlimit, "%d, %p"), 1122 args->resource, (void *)args->rlim); 1123#endif 1124 1125 if (args->resource >= LINUX_RLIM_NLIMITS) 1126 return (EINVAL); 1127 1128 which = linux_to_bsd_resource[args->resource]; 1129 if (which == -1) 1130 return (EINVAL); 1131 bsd_rlp = &p->p_rlimit[which]; 1132 1133 rlim.rlim_cur = (l_ulong)bsd_rlp->rlim_cur; 1134 rlim.rlim_max = (l_ulong)bsd_rlp->rlim_max; 1135 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1136} 1137#endif /*!__alpha__*/ 1138 1139int 1140linux_sched_setscheduler(struct thread *td, 1141 struct linux_sched_setscheduler_args *args) 1142{ 1143 struct sched_setscheduler_args bsd; 1144 1145#ifdef DEBUG 1146 if (ldebug(sched_setscheduler)) 1147 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1148 args->pid, args->policy, (const void *)args->param); 1149#endif 1150 1151 switch (args->policy) { 1152 case LINUX_SCHED_OTHER: 1153 bsd.policy = SCHED_OTHER; 1154 break; 1155 case LINUX_SCHED_FIFO: 1156 bsd.policy = SCHED_FIFO; 1157 break; 1158 case LINUX_SCHED_RR: 1159 bsd.policy = SCHED_RR; 1160 break; 1161 default: 1162 return EINVAL; 1163 } 1164 1165 bsd.pid = args->pid; 1166 bsd.param = (struct sched_param *)args->param; 1167 return sched_setscheduler(td, &bsd); 1168} 1169 1170int 1171linux_sched_getscheduler(struct thread *td, 1172 struct linux_sched_getscheduler_args *args) 1173{ 1174 struct sched_getscheduler_args bsd; 1175 int error; 1176 1177#ifdef DEBUG 1178 if (ldebug(sched_getscheduler)) 1179 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1180#endif 1181 1182 bsd.pid = args->pid; 1183 error = sched_getscheduler(td, &bsd); 1184 1185 switch (td->td_retval[0]) { 1186 case SCHED_OTHER: 1187 td->td_retval[0] = LINUX_SCHED_OTHER; 1188 break; 1189 case SCHED_FIFO: 1190 td->td_retval[0] = LINUX_SCHED_FIFO; 1191 break; 1192 case SCHED_RR: 1193 td->td_retval[0] = LINUX_SCHED_RR; 1194 break; 1195 } 1196 1197 return error; 1198} 1199 1200int 1201linux_sched_get_priority_max(struct thread *td, 1202 struct linux_sched_get_priority_max_args *args) 1203{ 1204 struct sched_get_priority_max_args bsd; 1205 1206#ifdef DEBUG 1207 if (ldebug(sched_get_priority_max)) 1208 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1209#endif 1210 1211 switch (args->policy) { 1212 case LINUX_SCHED_OTHER: 1213 bsd.policy = SCHED_OTHER; 1214 break; 1215 case LINUX_SCHED_FIFO: 1216 bsd.policy = SCHED_FIFO; 1217 break; 1218 case LINUX_SCHED_RR: 1219 bsd.policy = SCHED_RR; 1220 break; 1221 default: 1222 return EINVAL; 1223 } 1224 return sched_get_priority_max(td, &bsd); 1225} 1226 1227int 1228linux_sched_get_priority_min(struct thread *td, 1229 struct linux_sched_get_priority_min_args *args) 1230{ 1231 struct sched_get_priority_min_args bsd; 1232 1233#ifdef DEBUG 1234 if (ldebug(sched_get_priority_min)) 1235 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1236#endif 1237 1238 switch (args->policy) { 1239 case LINUX_SCHED_OTHER: 1240 bsd.policy = SCHED_OTHER; 1241 break; 1242 case LINUX_SCHED_FIFO: 1243 bsd.policy = SCHED_FIFO; 1244 break; 1245 case LINUX_SCHED_RR: 1246 bsd.policy = SCHED_RR; 1247 break; 1248 default: 1249 return EINVAL; 1250 } 1251 return sched_get_priority_min(td, &bsd); 1252} 1253 1254#define REBOOT_CAD_ON 0x89abcdef 1255#define REBOOT_CAD_OFF 0 1256#define REBOOT_HALT 0xcdef0123 1257 1258int 1259linux_reboot(struct thread *td, struct linux_reboot_args *args) 1260{ 1261 struct reboot_args bsd_args; 1262 1263#ifdef DEBUG 1264 if (ldebug(reboot)) 1265 printf(ARGS(reboot, "0x%x"), args->cmd); 1266#endif 1267 if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF) 1268 return (0); 1269 bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0; 1270 return (reboot(td, &bsd_args)); 1271} 1272 1273#ifndef __alpha__ 1274 1275/* 1276 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1277 * td->td_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This 1278 * globbers registers that are assumed to be preserved. The following 1279 * lightweight syscalls fixes this. See also linux_getgid16() and 1280 * linux_getuid16() in linux_uid16.c. 1281 * 1282 * linux_getpid() - MP SAFE 1283 * linux_getgid() - MP SAFE 1284 * linux_getuid() - MP SAFE 1285 */ 1286 1287int 1288linux_getpid(struct thread *td, struct linux_getpid_args *args) 1289{ 1290 1291 td->td_retval[0] = td->td_proc->p_pid; 1292 return (0); 1293} 1294 1295int 1296linux_getgid(struct thread *td, struct linux_getgid_args *args) 1297{ 1298 1299 td->td_retval[0] = td->td_ucred->cr_rgid; 1300 return (0); 1301} 1302 1303int 1304linux_getuid(struct thread *td, struct linux_getuid_args *args) 1305{ 1306 1307 td->td_retval[0] = td->td_ucred->cr_ruid; 1308 return (0); 1309} 1310 1311#endif /*!__alpha__*/ 1312 1313int 1314linux_getsid(struct thread *td, struct linux_getsid_args *args) 1315{ 1316 struct getsid_args bsd; 1317 bsd.pid = args->pid; 1318 return getsid(td, &bsd); 1319} 1320