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 35 #include <sys/param.h> 36 #include <sys/blist.h> 37 #include <sys/fcntl.h> 38 #if defined(__i386__) 39 #include <sys/imgact_aout.h> 40 #endif 41 #include <sys/jail.h> 42 #include <sys/kernel.h> 43 #include <sys/limits.h> 44 #include <sys/lock.h> 45 #include <sys/malloc.h> 46 #include <sys/mman.h> 47 #include <sys/mount.h> 48 #include <sys/mutex.h> 49 #include <sys/namei.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/reboot.h> 53 #include <sys/racct.h> 54 #include <sys/resourcevar.h> 55 #include <sys/sched.h> 56 #include <sys/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 int stclohz; /* Statistics clock frequency */ 95 96 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 97 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 98 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 99 RLIMIT_MEMLOCK, RLIMIT_AS 100 }; 101 102 struct l_sysinfo { 103 l_long uptime; /* Seconds since boot */ 104 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 105 #define LINUX_SYSINFO_LOADS_SCALE 65536 106 l_ulong totalram; /* Total usable main memory size */ 107 l_ulong freeram; /* Available memory size */ 108 l_ulong sharedram; /* Amount of shared memory */ 109 l_ulong bufferram; /* Memory used by buffers */ 110 l_ulong totalswap; /* Total swap space size */ 111 l_ulong freeswap; /* swap space still available */ 112 l_ushort procs; /* Number of current processes */ 113 l_ushort pads; 114 l_ulong totalbig; 115 l_ulong freebig; 116 l_uint mem_unit; 117 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 118 }; 119 int 120 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 121 { 122 struct l_sysinfo sysinfo; 123 vm_object_t object; 124 int i, j; 125 struct timespec ts; 126 127 getnanouptime(&ts); 128 if (ts.tv_nsec != 0) 129 ts.tv_sec++; 130 sysinfo.uptime = ts.tv_sec; 131 132 /* Use the information from the mib to get our load averages */ 133 for (i = 0; i < 3; i++) 134 sysinfo.loads[i] = averunnable.ldavg[i] * 135 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 136 137 sysinfo.totalram = physmem * PAGE_SIZE; 138 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 139 140 sysinfo.sharedram = 0; 141 mtx_lock(&vm_object_list_mtx); 142 TAILQ_FOREACH(object, &vm_object_list, object_list) 143 if (object->shadow_count > 1) 144 sysinfo.sharedram += object->resident_page_count; 145 mtx_unlock(&vm_object_list_mtx); 146 147 sysinfo.sharedram *= PAGE_SIZE; 148 sysinfo.bufferram = 0; 149 150 swap_pager_status(&i, &j); 151 sysinfo.totalswap = i * PAGE_SIZE; 152 sysinfo.freeswap = (i - j) * PAGE_SIZE; 153 154 sysinfo.procs = nprocs; 155 156 /* The following are only present in newer Linux kernels. */ 157 sysinfo.totalbig = 0; 158 sysinfo.freebig = 0; 159 sysinfo.mem_unit = 1; 160 161 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 162 } 163 164 int 165 linux_alarm(struct thread *td, struct linux_alarm_args *args) 166 { 167 struct itimerval it, old_it; 168 u_int secs; 169 int error; 170 171 #ifdef DEBUG 172 if (ldebug(alarm)) 173 printf(ARGS(alarm, "%u"), args->secs); 174 #endif 175 176 secs = args->secs; 177 178 if (secs > INT_MAX) 179 secs = INT_MAX; 180 181 it.it_value.tv_sec = (long) secs; 182 it.it_value.tv_usec = 0; 183 it.it_interval.tv_sec = 0; 184 it.it_interval.tv_usec = 0; 185 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 186 if (error) 187 return (error); 188 if (timevalisset(&old_it.it_value)) { 189 if (old_it.it_value.tv_usec != 0) 190 old_it.it_value.tv_sec++; 191 td->td_retval[0] = old_it.it_value.tv_sec; 192 } 193 return (0); 194 } 195 196 int 197 linux_brk(struct thread *td, struct linux_brk_args *args) 198 { 199 struct vmspace *vm = td->td_proc->p_vmspace; 200 vm_offset_t new, old; 201 struct obreak_args /* { 202 char * nsize; 203 } */ tmp; 204 205 #ifdef DEBUG 206 if (ldebug(brk)) 207 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 208 #endif 209 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 210 new = (vm_offset_t)args->dsend; 211 tmp.nsize = (char *)new; 212 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 213 td->td_retval[0] = (long)new; 214 else 215 td->td_retval[0] = (long)old; 216 217 return (0); 218 } 219 220 #if defined(__i386__) 221 /* XXX: what about amd64/linux32? */ 222 223 int 224 linux_uselib(struct thread *td, struct linux_uselib_args *args) 225 { 226 struct nameidata ni; 227 struct vnode *vp; 228 struct exec *a_out; 229 struct vattr attr; 230 vm_offset_t vmaddr; 231 unsigned long file_offset; 232 vm_offset_t buffer; 233 unsigned long bss_size; 234 char *library; 235 int error; 236 int locked, vfslocked; 237 238 LCONVPATHEXIST(td, args->library, &library); 239 240 #ifdef DEBUG 241 if (ldebug(uselib)) 242 printf(ARGS(uselib, "%s"), library); 243 #endif 244 245 a_out = NULL; 246 vfslocked = 0; 247 locked = 0; 248 vp = NULL; 249 250 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1, 251 UIO_SYSSPACE, library, td); 252 error = namei(&ni); 253 LFREEPATH(library); 254 if (error) 255 goto cleanup; 256 257 vp = ni.ni_vp; 258 vfslocked = NDHASGIANT(&ni); 259 NDFREE(&ni, NDF_ONLY_PNBUF); 260 261 /* 262 * From here on down, we have a locked vnode that must be unlocked. 263 * XXX: The code below largely duplicates exec_check_permissions(). 264 */ 265 locked = 1; 266 267 /* Writable? */ 268 if (vp->v_writecount) { 269 error = ETXTBSY; 270 goto cleanup; 271 } 272 273 /* Executable? */ 274 error = VOP_GETATTR(vp, &attr, td->td_ucred); 275 if (error) 276 goto cleanup; 277 278 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 279 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 280 /* EACCESS is what exec(2) returns. */ 281 error = ENOEXEC; 282 goto cleanup; 283 } 284 285 /* Sensible size? */ 286 if (attr.va_size == 0) { 287 error = ENOEXEC; 288 goto cleanup; 289 } 290 291 /* Can we access it? */ 292 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 293 if (error) 294 goto cleanup; 295 296 /* 297 * XXX: This should use vn_open() so that it is properly authorized, 298 * and to reduce code redundancy all over the place here. 299 * XXX: Not really, it duplicates far more of exec_check_permissions() 300 * than vn_open(). 301 */ 302 #ifdef MAC 303 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 304 if (error) 305 goto cleanup; 306 #endif 307 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 308 if (error) 309 goto cleanup; 310 311 /* Pull in executable header into kernel_map */ 312 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 313 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 314 if (error) 315 goto cleanup; 316 317 /* Is it a Linux binary ? */ 318 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 319 error = ENOEXEC; 320 goto cleanup; 321 } 322 323 /* 324 * While we are here, we should REALLY do some more checks 325 */ 326 327 /* Set file/virtual offset based on a.out variant. */ 328 switch ((int)(a_out->a_magic & 0xffff)) { 329 case 0413: /* ZMAGIC */ 330 file_offset = 1024; 331 break; 332 case 0314: /* QMAGIC */ 333 file_offset = 0; 334 break; 335 default: 336 error = ENOEXEC; 337 goto cleanup; 338 } 339 340 bss_size = round_page(a_out->a_bss); 341 342 /* Check various fields in header for validity/bounds. */ 343 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 344 error = ENOEXEC; 345 goto cleanup; 346 } 347 348 /* text + data can't exceed file size */ 349 if (a_out->a_data + a_out->a_text > attr.va_size) { 350 error = EFAULT; 351 goto cleanup; 352 } 353 354 /* 355 * text/data/bss must not exceed limits 356 * XXX - this is not complete. it should check current usage PLUS 357 * the resources needed by this library. 358 */ 359 PROC_LOCK(td->td_proc); 360 if (a_out->a_text > maxtsiz || 361 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) || 362 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 363 bss_size) != 0) { 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, sizeof(l_int) * 8); 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 = sys_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 (sys_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_clock_t tms_utime; 657 l_clock_t tms_stime; 658 l_clock_t tms_cutime; 659 l_clock_t tms_cstime; 660 }; 661 662 663 /* 664 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 665 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 666 * auxiliary vector entry. 667 */ 668 #define CLK_TCK 100 669 670 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 671 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 672 673 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 674 CONVNTCK(r) : CONVOTCK(r)) 675 676 int 677 linux_times(struct thread *td, struct linux_times_args *args) 678 { 679 struct timeval tv, utime, stime, cutime, cstime; 680 struct l_times_argv tms; 681 struct proc *p; 682 int error; 683 684 #ifdef DEBUG 685 if (ldebug(times)) 686 printf(ARGS(times, "*")); 687 #endif 688 689 if (args->buf != NULL) { 690 p = td->td_proc; 691 PROC_LOCK(p); 692 PROC_SLOCK(p); 693 calcru(p, &utime, &stime); 694 PROC_SUNLOCK(p); 695 calccru(p, &cutime, &cstime); 696 PROC_UNLOCK(p); 697 698 tms.tms_utime = CONVTCK(utime); 699 tms.tms_stime = CONVTCK(stime); 700 701 tms.tms_cutime = CONVTCK(cutime); 702 tms.tms_cstime = CONVTCK(cstime); 703 704 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 705 return (error); 706 } 707 708 microuptime(&tv); 709 td->td_retval[0] = (int)CONVTCK(tv); 710 return (0); 711 } 712 713 int 714 linux_newuname(struct thread *td, struct linux_newuname_args *args) 715 { 716 struct l_new_utsname utsname; 717 char osname[LINUX_MAX_UTSNAME]; 718 char osrelease[LINUX_MAX_UTSNAME]; 719 char *p; 720 721 #ifdef DEBUG 722 if (ldebug(newuname)) 723 printf(ARGS(newuname, "*")); 724 #endif 725 726 linux_get_osname(td, osname); 727 linux_get_osrelease(td, osrelease); 728 729 bzero(&utsname, sizeof(utsname)); 730 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 731 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 732 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 733 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 734 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 735 for (p = utsname.version; *p != '\0'; ++p) 736 if (*p == '\n') { 737 *p = '\0'; 738 break; 739 } 740 strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME); 741 742 return (copyout(&utsname, args->buf, sizeof(utsname))); 743 } 744 745 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 746 struct l_utimbuf { 747 l_time_t l_actime; 748 l_time_t l_modtime; 749 }; 750 751 int 752 linux_utime(struct thread *td, struct linux_utime_args *args) 753 { 754 struct timeval tv[2], *tvp; 755 struct l_utimbuf lut; 756 char *fname; 757 int error; 758 759 LCONVPATHEXIST(td, args->fname, &fname); 760 761 #ifdef DEBUG 762 if (ldebug(utime)) 763 printf(ARGS(utime, "%s, *"), fname); 764 #endif 765 766 if (args->times) { 767 if ((error = copyin(args->times, &lut, sizeof lut))) { 768 LFREEPATH(fname); 769 return (error); 770 } 771 tv[0].tv_sec = lut.l_actime; 772 tv[0].tv_usec = 0; 773 tv[1].tv_sec = lut.l_modtime; 774 tv[1].tv_usec = 0; 775 tvp = tv; 776 } else 777 tvp = NULL; 778 779 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 780 LFREEPATH(fname); 781 return (error); 782 } 783 784 int 785 linux_utimes(struct thread *td, struct linux_utimes_args *args) 786 { 787 l_timeval ltv[2]; 788 struct timeval tv[2], *tvp = NULL; 789 char *fname; 790 int error; 791 792 LCONVPATHEXIST(td, args->fname, &fname); 793 794 #ifdef DEBUG 795 if (ldebug(utimes)) 796 printf(ARGS(utimes, "%s, *"), fname); 797 #endif 798 799 if (args->tptr != NULL) { 800 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 801 LFREEPATH(fname); 802 return (error); 803 } 804 tv[0].tv_sec = ltv[0].tv_sec; 805 tv[0].tv_usec = ltv[0].tv_usec; 806 tv[1].tv_sec = ltv[1].tv_sec; 807 tv[1].tv_usec = ltv[1].tv_usec; 808 tvp = tv; 809 } 810 811 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 812 LFREEPATH(fname); 813 return (error); 814 } 815 816 int 817 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 818 { 819 l_timeval ltv[2]; 820 struct timeval tv[2], *tvp = NULL; 821 char *fname; 822 int error, dfd; 823 824 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 825 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 826 827 #ifdef DEBUG 828 if (ldebug(futimesat)) 829 printf(ARGS(futimesat, "%s, *"), fname); 830 #endif 831 832 if (args->utimes != NULL) { 833 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 834 LFREEPATH(fname); 835 return (error); 836 } 837 tv[0].tv_sec = ltv[0].tv_sec; 838 tv[0].tv_usec = ltv[0].tv_usec; 839 tv[1].tv_sec = ltv[1].tv_sec; 840 tv[1].tv_usec = ltv[1].tv_usec; 841 tvp = tv; 842 } 843 844 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 845 LFREEPATH(fname); 846 return (error); 847 } 848 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 849 850 int 851 linux_common_wait(struct thread *td, int pid, int *status, 852 int options, struct rusage *ru) 853 { 854 int error, tmpstat; 855 856 error = kern_wait(td, pid, &tmpstat, options, ru); 857 if (error) 858 return (error); 859 860 if (status) { 861 tmpstat &= 0xffff; 862 if (WIFSIGNALED(tmpstat)) 863 tmpstat = (tmpstat & 0xffffff80) | 864 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 865 else if (WIFSTOPPED(tmpstat)) 866 tmpstat = (tmpstat & 0xffff00ff) | 867 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 868 error = copyout(&tmpstat, status, sizeof(int)); 869 } 870 871 return (error); 872 } 873 874 int 875 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 876 { 877 int options; 878 879 #ifdef DEBUG 880 if (ldebug(waitpid)) 881 printf(ARGS(waitpid, "%d, %p, %d"), 882 args->pid, (void *)args->status, args->options); 883 #endif 884 /* 885 * this is necessary because the test in kern_wait doesn't work 886 * because we mess with the options here 887 */ 888 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) 889 return (EINVAL); 890 891 options = (args->options & (WNOHANG | WUNTRACED)); 892 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 893 if (args->options & __WCLONE) 894 options |= WLINUXCLONE; 895 896 return (linux_common_wait(td, args->pid, args->status, options, NULL)); 897 } 898 899 900 int 901 linux_mknod(struct thread *td, struct linux_mknod_args *args) 902 { 903 char *path; 904 int error; 905 906 LCONVPATHCREAT(td, args->path, &path); 907 908 #ifdef DEBUG 909 if (ldebug(mknod)) 910 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 911 #endif 912 913 switch (args->mode & S_IFMT) { 914 case S_IFIFO: 915 case S_IFSOCK: 916 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 917 break; 918 919 case S_IFCHR: 920 case S_IFBLK: 921 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 922 args->dev); 923 break; 924 925 case S_IFDIR: 926 error = EPERM; 927 break; 928 929 case 0: 930 args->mode |= S_IFREG; 931 /* FALLTHROUGH */ 932 case S_IFREG: 933 error = kern_open(td, path, UIO_SYSSPACE, 934 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 935 if (error == 0) 936 kern_close(td, td->td_retval[0]); 937 break; 938 939 default: 940 error = EINVAL; 941 break; 942 } 943 LFREEPATH(path); 944 return (error); 945 } 946 947 int 948 linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 949 { 950 char *path; 951 int error, dfd; 952 953 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 954 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 955 956 #ifdef DEBUG 957 if (ldebug(mknodat)) 958 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 959 #endif 960 961 switch (args->mode & S_IFMT) { 962 case S_IFIFO: 963 case S_IFSOCK: 964 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 965 break; 966 967 case S_IFCHR: 968 case S_IFBLK: 969 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 970 args->dev); 971 break; 972 973 case S_IFDIR: 974 error = EPERM; 975 break; 976 977 case 0: 978 args->mode |= S_IFREG; 979 /* FALLTHROUGH */ 980 case S_IFREG: 981 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 982 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 983 if (error == 0) 984 kern_close(td, td->td_retval[0]); 985 break; 986 987 default: 988 error = EINVAL; 989 break; 990 } 991 LFREEPATH(path); 992 return (error); 993 } 994 995 /* 996 * UGH! This is just about the dumbest idea I've ever heard!! 997 */ 998 int 999 linux_personality(struct thread *td, struct linux_personality_args *args) 1000 { 1001 #ifdef DEBUG 1002 if (ldebug(personality)) 1003 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1004 #endif 1005 if (args->per != 0) 1006 return (EINVAL); 1007 1008 /* Yes Jim, it's still a Linux... */ 1009 td->td_retval[0] = 0; 1010 return (0); 1011 } 1012 1013 struct l_itimerval { 1014 l_timeval it_interval; 1015 l_timeval it_value; 1016 }; 1017 1018 #define B2L_ITIMERVAL(bip, lip) \ 1019 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1020 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1021 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1022 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1023 1024 int 1025 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1026 { 1027 int error; 1028 struct l_itimerval ls; 1029 struct itimerval aitv, oitv; 1030 1031 #ifdef DEBUG 1032 if (ldebug(setitimer)) 1033 printf(ARGS(setitimer, "%p, %p"), 1034 (void *)uap->itv, (void *)uap->oitv); 1035 #endif 1036 1037 if (uap->itv == NULL) { 1038 uap->itv = uap->oitv; 1039 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1040 } 1041 1042 error = copyin(uap->itv, &ls, sizeof(ls)); 1043 if (error != 0) 1044 return (error); 1045 B2L_ITIMERVAL(&aitv, &ls); 1046 #ifdef DEBUG 1047 if (ldebug(setitimer)) { 1048 printf("setitimer: value: sec: %jd, usec: %ld\n", 1049 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1050 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1051 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1052 } 1053 #endif 1054 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1055 if (error != 0 || uap->oitv == NULL) 1056 return (error); 1057 B2L_ITIMERVAL(&ls, &oitv); 1058 1059 return (copyout(&ls, uap->oitv, sizeof(ls))); 1060 } 1061 1062 int 1063 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1064 { 1065 int error; 1066 struct l_itimerval ls; 1067 struct itimerval aitv; 1068 1069 #ifdef DEBUG 1070 if (ldebug(getitimer)) 1071 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1072 #endif 1073 error = kern_getitimer(td, uap->which, &aitv); 1074 if (error != 0) 1075 return (error); 1076 B2L_ITIMERVAL(&ls, &aitv); 1077 return (copyout(&ls, uap->itv, sizeof(ls))); 1078 } 1079 1080 int 1081 linux_nice(struct thread *td, struct linux_nice_args *args) 1082 { 1083 struct setpriority_args bsd_args; 1084 1085 bsd_args.which = PRIO_PROCESS; 1086 bsd_args.who = 0; /* current process */ 1087 bsd_args.prio = args->inc; 1088 return (sys_setpriority(td, &bsd_args)); 1089 } 1090 1091 int 1092 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1093 { 1094 struct ucred *newcred, *oldcred; 1095 l_gid_t *linux_gidset; 1096 gid_t *bsd_gidset; 1097 int ngrp, error; 1098 struct proc *p; 1099 1100 ngrp = args->gidsetsize; 1101 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1102 return (EINVAL); 1103 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK); 1104 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1105 if (error) 1106 goto out; 1107 newcred = crget(); 1108 p = td->td_proc; 1109 PROC_LOCK(p); 1110 oldcred = crcopysafe(p, newcred); 1111 1112 /* 1113 * cr_groups[0] holds egid. Setting the whole set from 1114 * the supplied set will cause egid to be changed too. 1115 * Keep cr_groups[0] unchanged to prevent that. 1116 */ 1117 1118 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1119 PROC_UNLOCK(p); 1120 crfree(newcred); 1121 goto out; 1122 } 1123 1124 if (ngrp > 0) { 1125 newcred->cr_ngroups = ngrp + 1; 1126 1127 bsd_gidset = newcred->cr_groups; 1128 ngrp--; 1129 while (ngrp >= 0) { 1130 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1131 ngrp--; 1132 } 1133 } else 1134 newcred->cr_ngroups = 1; 1135 1136 setsugid(p); 1137 p->p_ucred = newcred; 1138 PROC_UNLOCK(p); 1139 crfree(oldcred); 1140 error = 0; 1141 out: 1142 free(linux_gidset, M_TEMP); 1143 return (error); 1144 } 1145 1146 int 1147 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1148 { 1149 struct ucred *cred; 1150 l_gid_t *linux_gidset; 1151 gid_t *bsd_gidset; 1152 int bsd_gidsetsz, ngrp, error; 1153 1154 cred = td->td_ucred; 1155 bsd_gidset = cred->cr_groups; 1156 bsd_gidsetsz = cred->cr_ngroups - 1; 1157 1158 /* 1159 * cr_groups[0] holds egid. Returning the whole set 1160 * here will cause a duplicate. Exclude cr_groups[0] 1161 * to prevent that. 1162 */ 1163 1164 if ((ngrp = args->gidsetsize) == 0) { 1165 td->td_retval[0] = bsd_gidsetsz; 1166 return (0); 1167 } 1168 1169 if (ngrp < bsd_gidsetsz) 1170 return (EINVAL); 1171 1172 ngrp = 0; 1173 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1174 M_TEMP, M_WAITOK); 1175 while (ngrp < bsd_gidsetsz) { 1176 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1177 ngrp++; 1178 } 1179 1180 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1181 free(linux_gidset, M_TEMP); 1182 if (error) 1183 return (error); 1184 1185 td->td_retval[0] = ngrp; 1186 return (0); 1187 } 1188 1189 int 1190 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1191 { 1192 struct rlimit bsd_rlim; 1193 struct l_rlimit rlim; 1194 u_int which; 1195 int error; 1196 1197 #ifdef DEBUG 1198 if (ldebug(setrlimit)) 1199 printf(ARGS(setrlimit, "%d, %p"), 1200 args->resource, (void *)args->rlim); 1201 #endif 1202 1203 if (args->resource >= LINUX_RLIM_NLIMITS) 1204 return (EINVAL); 1205 1206 which = linux_to_bsd_resource[args->resource]; 1207 if (which == -1) 1208 return (EINVAL); 1209 1210 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1211 if (error) 1212 return (error); 1213 1214 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1215 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1216 return (kern_setrlimit(td, which, &bsd_rlim)); 1217 } 1218 1219 int 1220 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1221 { 1222 struct l_rlimit rlim; 1223 struct proc *p = td->td_proc; 1224 struct rlimit bsd_rlim; 1225 u_int which; 1226 1227 #ifdef DEBUG 1228 if (ldebug(old_getrlimit)) 1229 printf(ARGS(old_getrlimit, "%d, %p"), 1230 args->resource, (void *)args->rlim); 1231 #endif 1232 1233 if (args->resource >= LINUX_RLIM_NLIMITS) 1234 return (EINVAL); 1235 1236 which = linux_to_bsd_resource[args->resource]; 1237 if (which == -1) 1238 return (EINVAL); 1239 1240 PROC_LOCK(p); 1241 lim_rlimit(p, which, &bsd_rlim); 1242 PROC_UNLOCK(p); 1243 1244 #ifdef COMPAT_LINUX32 1245 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1246 if (rlim.rlim_cur == UINT_MAX) 1247 rlim.rlim_cur = INT_MAX; 1248 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1249 if (rlim.rlim_max == UINT_MAX) 1250 rlim.rlim_max = INT_MAX; 1251 #else 1252 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1253 if (rlim.rlim_cur == ULONG_MAX) 1254 rlim.rlim_cur = LONG_MAX; 1255 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1256 if (rlim.rlim_max == ULONG_MAX) 1257 rlim.rlim_max = LONG_MAX; 1258 #endif 1259 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1260 } 1261 1262 int 1263 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1264 { 1265 struct l_rlimit rlim; 1266 struct proc *p = td->td_proc; 1267 struct rlimit bsd_rlim; 1268 u_int which; 1269 1270 #ifdef DEBUG 1271 if (ldebug(getrlimit)) 1272 printf(ARGS(getrlimit, "%d, %p"), 1273 args->resource, (void *)args->rlim); 1274 #endif 1275 1276 if (args->resource >= LINUX_RLIM_NLIMITS) 1277 return (EINVAL); 1278 1279 which = linux_to_bsd_resource[args->resource]; 1280 if (which == -1) 1281 return (EINVAL); 1282 1283 PROC_LOCK(p); 1284 lim_rlimit(p, which, &bsd_rlim); 1285 PROC_UNLOCK(p); 1286 1287 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1288 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1289 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1290 } 1291 1292 int 1293 linux_sched_setscheduler(struct thread *td, 1294 struct linux_sched_setscheduler_args *args) 1295 { 1296 struct sched_setscheduler_args bsd; 1297 1298 #ifdef DEBUG 1299 if (ldebug(sched_setscheduler)) 1300 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1301 args->pid, args->policy, (const void *)args->param); 1302 #endif 1303 1304 switch (args->policy) { 1305 case LINUX_SCHED_OTHER: 1306 bsd.policy = SCHED_OTHER; 1307 break; 1308 case LINUX_SCHED_FIFO: 1309 bsd.policy = SCHED_FIFO; 1310 break; 1311 case LINUX_SCHED_RR: 1312 bsd.policy = SCHED_RR; 1313 break; 1314 default: 1315 return (EINVAL); 1316 } 1317 1318 bsd.pid = args->pid; 1319 bsd.param = (struct sched_param *)args->param; 1320 return (sys_sched_setscheduler(td, &bsd)); 1321 } 1322 1323 int 1324 linux_sched_getscheduler(struct thread *td, 1325 struct linux_sched_getscheduler_args *args) 1326 { 1327 struct sched_getscheduler_args bsd; 1328 int error; 1329 1330 #ifdef DEBUG 1331 if (ldebug(sched_getscheduler)) 1332 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1333 #endif 1334 1335 bsd.pid = args->pid; 1336 error = sys_sched_getscheduler(td, &bsd); 1337 1338 switch (td->td_retval[0]) { 1339 case SCHED_OTHER: 1340 td->td_retval[0] = LINUX_SCHED_OTHER; 1341 break; 1342 case SCHED_FIFO: 1343 td->td_retval[0] = LINUX_SCHED_FIFO; 1344 break; 1345 case SCHED_RR: 1346 td->td_retval[0] = LINUX_SCHED_RR; 1347 break; 1348 } 1349 1350 return (error); 1351 } 1352 1353 int 1354 linux_sched_get_priority_max(struct thread *td, 1355 struct linux_sched_get_priority_max_args *args) 1356 { 1357 struct sched_get_priority_max_args bsd; 1358 1359 #ifdef DEBUG 1360 if (ldebug(sched_get_priority_max)) 1361 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 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 return (sys_sched_get_priority_max(td, &bsd)); 1378 } 1379 1380 int 1381 linux_sched_get_priority_min(struct thread *td, 1382 struct linux_sched_get_priority_min_args *args) 1383 { 1384 struct sched_get_priority_min_args bsd; 1385 1386 #ifdef DEBUG 1387 if (ldebug(sched_get_priority_min)) 1388 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1389 #endif 1390 1391 switch (args->policy) { 1392 case LINUX_SCHED_OTHER: 1393 bsd.policy = SCHED_OTHER; 1394 break; 1395 case LINUX_SCHED_FIFO: 1396 bsd.policy = SCHED_FIFO; 1397 break; 1398 case LINUX_SCHED_RR: 1399 bsd.policy = SCHED_RR; 1400 break; 1401 default: 1402 return (EINVAL); 1403 } 1404 return (sys_sched_get_priority_min(td, &bsd)); 1405 } 1406 1407 #define REBOOT_CAD_ON 0x89abcdef 1408 #define REBOOT_CAD_OFF 0 1409 #define REBOOT_HALT 0xcdef0123 1410 #define REBOOT_RESTART 0x01234567 1411 #define REBOOT_RESTART2 0xA1B2C3D4 1412 #define REBOOT_POWEROFF 0x4321FEDC 1413 #define REBOOT_MAGIC1 0xfee1dead 1414 #define REBOOT_MAGIC2 0x28121969 1415 #define REBOOT_MAGIC2A 0x05121996 1416 #define REBOOT_MAGIC2B 0x16041998 1417 1418 int 1419 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1420 { 1421 struct reboot_args bsd_args; 1422 1423 #ifdef DEBUG 1424 if (ldebug(reboot)) 1425 printf(ARGS(reboot, "0x%x"), args->cmd); 1426 #endif 1427 1428 if (args->magic1 != REBOOT_MAGIC1) 1429 return (EINVAL); 1430 1431 switch (args->magic2) { 1432 case REBOOT_MAGIC2: 1433 case REBOOT_MAGIC2A: 1434 case REBOOT_MAGIC2B: 1435 break; 1436 default: 1437 return (EINVAL); 1438 } 1439 1440 switch (args->cmd) { 1441 case REBOOT_CAD_ON: 1442 case REBOOT_CAD_OFF: 1443 return (priv_check(td, PRIV_REBOOT)); 1444 case REBOOT_HALT: 1445 bsd_args.opt = RB_HALT; 1446 break; 1447 case REBOOT_RESTART: 1448 case REBOOT_RESTART2: 1449 bsd_args.opt = 0; 1450 break; 1451 case REBOOT_POWEROFF: 1452 bsd_args.opt = RB_POWEROFF; 1453 break; 1454 default: 1455 return (EINVAL); 1456 } 1457 return (sys_reboot(td, &bsd_args)); 1458 } 1459 1460 1461 /* 1462 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1463 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1464 * are assumed to be preserved. The following lightweight syscalls fixes 1465 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1466 * 1467 * linux_getpid() - MP SAFE 1468 * linux_getgid() - MP SAFE 1469 * linux_getuid() - MP SAFE 1470 */ 1471 1472 int 1473 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1474 { 1475 struct linux_emuldata *em; 1476 1477 #ifdef DEBUG 1478 if (ldebug(getpid)) 1479 printf(ARGS(getpid, "")); 1480 #endif 1481 1482 if (linux_use26(td)) { 1483 em = em_find(td->td_proc, EMUL_DONTLOCK); 1484 KASSERT(em != NULL, ("getpid: emuldata not found.\n")); 1485 td->td_retval[0] = em->shared->group_pid; 1486 } else { 1487 td->td_retval[0] = td->td_proc->p_pid; 1488 } 1489 1490 return (0); 1491 } 1492 1493 int 1494 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1495 { 1496 1497 #ifdef DEBUG 1498 if (ldebug(gettid)) 1499 printf(ARGS(gettid, "")); 1500 #endif 1501 1502 td->td_retval[0] = td->td_proc->p_pid; 1503 return (0); 1504 } 1505 1506 1507 int 1508 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1509 { 1510 struct linux_emuldata *em; 1511 struct proc *p, *pp; 1512 1513 #ifdef DEBUG 1514 if (ldebug(getppid)) 1515 printf(ARGS(getppid, "")); 1516 #endif 1517 1518 if (!linux_use26(td)) { 1519 PROC_LOCK(td->td_proc); 1520 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1521 PROC_UNLOCK(td->td_proc); 1522 return (0); 1523 } 1524 1525 em = em_find(td->td_proc, EMUL_DONTLOCK); 1526 1527 KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); 1528 1529 /* find the group leader */ 1530 p = pfind(em->shared->group_pid); 1531 1532 if (p == NULL) { 1533 #ifdef DEBUG 1534 printf(LMSG("parent process not found.\n")); 1535 #endif 1536 return (0); 1537 } 1538 1539 pp = p->p_pptr; /* switch to parent */ 1540 PROC_LOCK(pp); 1541 PROC_UNLOCK(p); 1542 1543 /* if its also linux process */ 1544 if (pp->p_sysent == &elf_linux_sysvec) { 1545 em = em_find(pp, EMUL_DONTLOCK); 1546 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); 1547 1548 td->td_retval[0] = em->shared->group_pid; 1549 } else 1550 td->td_retval[0] = pp->p_pid; 1551 1552 PROC_UNLOCK(pp); 1553 1554 return (0); 1555 } 1556 1557 int 1558 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1559 { 1560 1561 #ifdef DEBUG 1562 if (ldebug(getgid)) 1563 printf(ARGS(getgid, "")); 1564 #endif 1565 1566 td->td_retval[0] = td->td_ucred->cr_rgid; 1567 return (0); 1568 } 1569 1570 int 1571 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1572 { 1573 1574 #ifdef DEBUG 1575 if (ldebug(getuid)) 1576 printf(ARGS(getuid, "")); 1577 #endif 1578 1579 td->td_retval[0] = td->td_ucred->cr_ruid; 1580 return (0); 1581 } 1582 1583 1584 int 1585 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1586 { 1587 struct getsid_args bsd; 1588 1589 #ifdef DEBUG 1590 if (ldebug(getsid)) 1591 printf(ARGS(getsid, "%i"), args->pid); 1592 #endif 1593 1594 bsd.pid = args->pid; 1595 return (sys_getsid(td, &bsd)); 1596 } 1597 1598 int 1599 linux_nosys(struct thread *td, struct nosys_args *ignore) 1600 { 1601 1602 return (ENOSYS); 1603 } 1604 1605 int 1606 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1607 { 1608 struct getpriority_args bsd_args; 1609 int error; 1610 1611 #ifdef DEBUG 1612 if (ldebug(getpriority)) 1613 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1614 #endif 1615 1616 bsd_args.which = args->which; 1617 bsd_args.who = args->who; 1618 error = sys_getpriority(td, &bsd_args); 1619 td->td_retval[0] = 20 - td->td_retval[0]; 1620 return (error); 1621 } 1622 1623 int 1624 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1625 { 1626 int name[2]; 1627 1628 #ifdef DEBUG 1629 if (ldebug(sethostname)) 1630 printf(ARGS(sethostname, "*, %i"), args->len); 1631 #endif 1632 1633 name[0] = CTL_KERN; 1634 name[1] = KERN_HOSTNAME; 1635 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1636 args->len, 0, 0)); 1637 } 1638 1639 int 1640 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1641 { 1642 int name[2]; 1643 1644 #ifdef DEBUG 1645 if (ldebug(setdomainname)) 1646 printf(ARGS(setdomainname, "*, %i"), args->len); 1647 #endif 1648 1649 name[0] = CTL_KERN; 1650 name[1] = KERN_NISDOMAINNAME; 1651 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1652 args->len, 0, 0)); 1653 } 1654 1655 int 1656 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1657 { 1658 struct linux_emuldata *em; 1659 1660 #ifdef DEBUG 1661 if (ldebug(exit_group)) 1662 printf(ARGS(exit_group, "%i"), args->error_code); 1663 #endif 1664 1665 em = em_find(td->td_proc, EMUL_DONTLOCK); 1666 if (em->shared->refs > 1) { 1667 EMUL_SHARED_WLOCK(&emul_shared_lock); 1668 em->shared->flags |= EMUL_SHARED_HASXSTAT; 1669 em->shared->xstat = W_EXITCODE(args->error_code, 0); 1670 EMUL_SHARED_WUNLOCK(&emul_shared_lock); 1671 if (linux_use26(td)) 1672 linux_kill_threads(td, SIGKILL); 1673 } 1674 1675 /* 1676 * XXX: we should send a signal to the parent if 1677 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1678 * as it doesnt occur often. 1679 */ 1680 exit1(td, W_EXITCODE(args->error_code, 0)); 1681 1682 return (0); 1683 } 1684 1685 #define _LINUX_CAPABILITY_VERSION 0x19980330 1686 1687 struct l_user_cap_header { 1688 l_int version; 1689 l_int pid; 1690 }; 1691 1692 struct l_user_cap_data { 1693 l_int effective; 1694 l_int permitted; 1695 l_int inheritable; 1696 }; 1697 1698 int 1699 linux_capget(struct thread *td, struct linux_capget_args *args) 1700 { 1701 struct l_user_cap_header luch; 1702 struct l_user_cap_data lucd; 1703 int error; 1704 1705 if (args->hdrp == NULL) 1706 return (EFAULT); 1707 1708 error = copyin(args->hdrp, &luch, sizeof(luch)); 1709 if (error != 0) 1710 return (error); 1711 1712 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1713 luch.version = _LINUX_CAPABILITY_VERSION; 1714 error = copyout(&luch, args->hdrp, sizeof(luch)); 1715 if (error) 1716 return (error); 1717 return (EINVAL); 1718 } 1719 1720 if (luch.pid) 1721 return (EPERM); 1722 1723 if (args->datap) { 1724 /* 1725 * The current implementation doesn't support setting 1726 * a capability (it's essentially a stub) so indicate 1727 * that no capabilities are currently set or available 1728 * to request. 1729 */ 1730 bzero (&lucd, sizeof(lucd)); 1731 error = copyout(&lucd, args->datap, sizeof(lucd)); 1732 } 1733 1734 return (error); 1735 } 1736 1737 int 1738 linux_capset(struct thread *td, struct linux_capset_args *args) 1739 { 1740 struct l_user_cap_header luch; 1741 struct l_user_cap_data lucd; 1742 int error; 1743 1744 if (args->hdrp == NULL || args->datap == NULL) 1745 return (EFAULT); 1746 1747 error = copyin(args->hdrp, &luch, sizeof(luch)); 1748 if (error != 0) 1749 return (error); 1750 1751 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1752 luch.version = _LINUX_CAPABILITY_VERSION; 1753 error = copyout(&luch, args->hdrp, sizeof(luch)); 1754 if (error) 1755 return (error); 1756 return (EINVAL); 1757 } 1758 1759 if (luch.pid) 1760 return (EPERM); 1761 1762 error = copyin(args->datap, &lucd, sizeof(lucd)); 1763 if (error != 0) 1764 return (error); 1765 1766 /* We currently don't support setting any capabilities. */ 1767 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1768 linux_msg(td, 1769 "capset effective=0x%x, permitted=0x%x, " 1770 "inheritable=0x%x is not implemented", 1771 (int)lucd.effective, (int)lucd.permitted, 1772 (int)lucd.inheritable); 1773 return (EPERM); 1774 } 1775 1776 return (0); 1777 } 1778 1779 int 1780 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1781 { 1782 int error = 0, max_size; 1783 struct proc *p = td->td_proc; 1784 char comm[LINUX_MAX_COMM_LEN]; 1785 struct linux_emuldata *em; 1786 int pdeath_signal; 1787 1788 #ifdef DEBUG 1789 if (ldebug(prctl)) 1790 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, 1791 args->arg2, args->arg3, args->arg4, args->arg5); 1792 #endif 1793 1794 switch (args->option) { 1795 case LINUX_PR_SET_PDEATHSIG: 1796 if (!LINUX_SIG_VALID(args->arg2)) 1797 return (EINVAL); 1798 em = em_find(p, EMUL_DOLOCK); 1799 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1800 em->pdeath_signal = args->arg2; 1801 EMUL_UNLOCK(&emul_lock); 1802 break; 1803 case LINUX_PR_GET_PDEATHSIG: 1804 em = em_find(p, EMUL_DOLOCK); 1805 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1806 pdeath_signal = em->pdeath_signal; 1807 EMUL_UNLOCK(&emul_lock); 1808 error = copyout(&pdeath_signal, 1809 (void *)(register_t)args->arg2, 1810 sizeof(pdeath_signal)); 1811 break; 1812 case LINUX_PR_GET_KEEPCAPS: 1813 /* 1814 * Indicate that we always clear the effective and 1815 * permitted capability sets when the user id becomes 1816 * non-zero (actually the capability sets are simply 1817 * always zero in the current implementation). 1818 */ 1819 td->td_retval[0] = 0; 1820 break; 1821 case LINUX_PR_SET_KEEPCAPS: 1822 /* 1823 * Ignore requests to keep the effective and permitted 1824 * capability sets when the user id becomes non-zero. 1825 */ 1826 break; 1827 case LINUX_PR_SET_NAME: 1828 /* 1829 * To be on the safe side we need to make sure to not 1830 * overflow the size a linux program expects. We already 1831 * do this here in the copyin, so that we don't need to 1832 * check on copyout. 1833 */ 1834 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1835 error = copyinstr((void *)(register_t)args->arg2, comm, 1836 max_size, NULL); 1837 1838 /* Linux silently truncates the name if it is too long. */ 1839 if (error == ENAMETOOLONG) { 1840 /* 1841 * XXX: copyinstr() isn't documented to populate the 1842 * array completely, so do a copyin() to be on the 1843 * safe side. This should be changed in case 1844 * copyinstr() is changed to guarantee this. 1845 */ 1846 error = copyin((void *)(register_t)args->arg2, comm, 1847 max_size - 1); 1848 comm[max_size - 1] = '\0'; 1849 } 1850 if (error) 1851 return (error); 1852 1853 PROC_LOCK(p); 1854 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1855 PROC_UNLOCK(p); 1856 break; 1857 case LINUX_PR_GET_NAME: 1858 PROC_LOCK(p); 1859 strlcpy(comm, p->p_comm, sizeof(comm)); 1860 PROC_UNLOCK(p); 1861 error = copyout(comm, (void *)(register_t)args->arg2, 1862 strlen(comm) + 1); 1863 break; 1864 default: 1865 error = EINVAL; 1866 break; 1867 } 1868 1869 return (error); 1870 } 1871 1872 /* 1873 * Get affinity of a process. 1874 */ 1875 int 1876 linux_sched_getaffinity(struct thread *td, 1877 struct linux_sched_getaffinity_args *args) 1878 { 1879 int error; 1880 struct cpuset_getaffinity_args cga; 1881 1882 #ifdef DEBUG 1883 if (ldebug(sched_getaffinity)) 1884 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 1885 args->len); 1886 #endif 1887 if (args->len < sizeof(cpuset_t)) 1888 return (EINVAL); 1889 1890 cga.level = CPU_LEVEL_WHICH; 1891 cga.which = CPU_WHICH_PID; 1892 cga.id = args->pid; 1893 cga.cpusetsize = sizeof(cpuset_t); 1894 cga.mask = (cpuset_t *) args->user_mask_ptr; 1895 1896 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 1897 td->td_retval[0] = sizeof(cpuset_t); 1898 1899 return (error); 1900 } 1901 1902 /* 1903 * Set affinity of a process. 1904 */ 1905 int 1906 linux_sched_setaffinity(struct thread *td, 1907 struct linux_sched_setaffinity_args *args) 1908 { 1909 struct cpuset_setaffinity_args csa; 1910 1911 #ifdef DEBUG 1912 if (ldebug(sched_setaffinity)) 1913 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 1914 args->len); 1915 #endif 1916 if (args->len < sizeof(cpuset_t)) 1917 return (EINVAL); 1918 1919 csa.level = CPU_LEVEL_WHICH; 1920 csa.which = CPU_WHICH_PID; 1921 csa.id = args->pid; 1922 csa.cpusetsize = sizeof(cpuset_t); 1923 csa.mask = (cpuset_t *) args->user_mask_ptr; 1924 1925 return (sys_cpuset_setaffinity(td, &csa)); 1926 } 1927