1 /*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 1994-1995 Søren Schmidt 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer 11 * in this position and unchanged. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_compat.h" 34 35 #include <sys/param.h> 36 #include <sys/blist.h> 37 #include <sys/fcntl.h> 38 #if defined(__i386__) 39 #include <sys/imgact_aout.h> 40 #endif 41 #include <sys/jail.h> 42 #include <sys/kernel.h> 43 #include <sys/limits.h> 44 #include <sys/lock.h> 45 #include <sys/malloc.h> 46 #include <sys/mman.h> 47 #include <sys/mount.h> 48 #include <sys/mutex.h> 49 #include <sys/namei.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/reboot.h> 53 #include <sys/racct.h> 54 #include <sys/resourcevar.h> 55 #include <sys/sched.h> 56 #include <sys/sdt.h> 57 #include <sys/signalvar.h> 58 #include <sys/stat.h> 59 #include <sys/syscallsubr.h> 60 #include <sys/sysctl.h> 61 #include <sys/sysproto.h> 62 #include <sys/systm.h> 63 #include <sys/time.h> 64 #include <sys/vmmeter.h> 65 #include <sys/vnode.h> 66 #include <sys/wait.h> 67 #include <sys/cpuset.h> 68 69 #include <security/mac/mac_framework.h> 70 71 #include <vm/vm.h> 72 #include <vm/pmap.h> 73 #include <vm/vm_kern.h> 74 #include <vm/vm_map.h> 75 #include <vm/vm_extern.h> 76 #include <vm/vm_object.h> 77 #include <vm/swap_pager.h> 78 79 #ifdef COMPAT_LINUX32 80 #include <machine/../linux32/linux.h> 81 #include <machine/../linux32/linux32_proto.h> 82 #else 83 #include <machine/../linux/linux.h> 84 #include <machine/../linux/linux_proto.h> 85 #endif 86 87 #include <compat/linux/linux_dtrace.h> 88 #include <compat/linux/linux_file.h> 89 #include <compat/linux/linux_mib.h> 90 #include <compat/linux/linux_signal.h> 91 #include <compat/linux/linux_timer.h> 92 #include <compat/linux/linux_util.h> 93 #include <compat/linux/linux_sysproto.h> 94 #include <compat/linux/linux_emul.h> 95 #include <compat/linux/linux_misc.h> 96 97 /** 98 * Special DTrace provider for the linuxulator. 99 * 100 * In this file we define the provider for the entire linuxulator. All 101 * modules (= files of the linuxulator) use it. 102 * 103 * We define a different name depending on the emulated bitsize, see 104 * ../../<ARCH>/linux{,32}/linux.h, e.g.: 105 * native bitsize = linuxulator 106 * amd64, 32bit emulation = linuxulator32 107 */ 108 LIN_SDT_PROVIDER_DEFINE(LINUX_DTRACE); 109 110 int stclohz; /* Statistics clock frequency */ 111 112 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 113 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 114 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 115 RLIMIT_MEMLOCK, RLIMIT_AS 116 }; 117 118 struct l_sysinfo { 119 l_long uptime; /* Seconds since boot */ 120 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 121 #define LINUX_SYSINFO_LOADS_SCALE 65536 122 l_ulong totalram; /* Total usable main memory size */ 123 l_ulong freeram; /* Available memory size */ 124 l_ulong sharedram; /* Amount of shared memory */ 125 l_ulong bufferram; /* Memory used by buffers */ 126 l_ulong totalswap; /* Total swap space size */ 127 l_ulong freeswap; /* swap space still available */ 128 l_ushort procs; /* Number of current processes */ 129 l_ushort pads; 130 l_ulong totalbig; 131 l_ulong freebig; 132 l_uint mem_unit; 133 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 134 }; 135 136 struct l_pselect6arg { 137 l_uintptr_t ss; 138 l_size_t ss_len; 139 }; 140 141 static int linux_utimensat_nsec_valid(l_long); 142 143 144 int 145 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 146 { 147 struct l_sysinfo sysinfo; 148 vm_object_t object; 149 int i, j; 150 struct timespec ts; 151 152 bzero(&sysinfo, sizeof(sysinfo)); 153 getnanouptime(&ts); 154 if (ts.tv_nsec != 0) 155 ts.tv_sec++; 156 sysinfo.uptime = ts.tv_sec; 157 158 /* Use the information from the mib to get our load averages */ 159 for (i = 0; i < 3; i++) 160 sysinfo.loads[i] = averunnable.ldavg[i] * 161 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 162 163 sysinfo.totalram = physmem * PAGE_SIZE; 164 sysinfo.freeram = sysinfo.totalram - vm_cnt.v_wire_count * PAGE_SIZE; 165 166 sysinfo.sharedram = 0; 167 mtx_lock(&vm_object_list_mtx); 168 TAILQ_FOREACH(object, &vm_object_list, object_list) 169 if (object->shadow_count > 1) 170 sysinfo.sharedram += object->resident_page_count; 171 mtx_unlock(&vm_object_list_mtx); 172 173 sysinfo.sharedram *= PAGE_SIZE; 174 sysinfo.bufferram = 0; 175 176 swap_pager_status(&i, &j); 177 sysinfo.totalswap = i * PAGE_SIZE; 178 sysinfo.freeswap = (i - j) * PAGE_SIZE; 179 180 sysinfo.procs = nprocs; 181 182 /* The following are only present in newer Linux kernels. */ 183 sysinfo.totalbig = 0; 184 sysinfo.freebig = 0; 185 sysinfo.mem_unit = 1; 186 187 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 188 } 189 190 int 191 linux_alarm(struct thread *td, struct linux_alarm_args *args) 192 { 193 struct itimerval it, old_it; 194 u_int secs; 195 int error; 196 197 #ifdef DEBUG 198 if (ldebug(alarm)) 199 printf(ARGS(alarm, "%u"), args->secs); 200 #endif 201 secs = args->secs; 202 /* 203 * Linux alarm() is always successful. Limit secs to INT32_MAX / 2 204 * to match kern_setitimer()'s limit to avoid error from it. 205 * 206 * XXX. Linux limit secs to INT_MAX on 32 and does not limit on 64-bit 207 * platforms. 208 */ 209 if (secs > INT32_MAX / 2) 210 secs = INT32_MAX / 2; 211 212 it.it_value.tv_sec = secs; 213 it.it_value.tv_usec = 0; 214 timevalclear(&it.it_interval); 215 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 216 KASSERT(error == 0, ("kern_setitimer returns %d", error)); 217 218 if ((old_it.it_value.tv_sec == 0 && old_it.it_value.tv_usec > 0) || 219 old_it.it_value.tv_usec >= 500000) 220 old_it.it_value.tv_sec++; 221 td->td_retval[0] = old_it.it_value.tv_sec; 222 return (0); 223 } 224 225 int 226 linux_brk(struct thread *td, struct linux_brk_args *args) 227 { 228 struct vmspace *vm = td->td_proc->p_vmspace; 229 vm_offset_t new, old; 230 struct obreak_args /* { 231 char * nsize; 232 } */ tmp; 233 234 #ifdef DEBUG 235 if (ldebug(brk)) 236 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 237 #endif 238 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 239 new = (vm_offset_t)args->dsend; 240 tmp.nsize = (char *)new; 241 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 242 td->td_retval[0] = (long)new; 243 else 244 td->td_retval[0] = (long)old; 245 246 return (0); 247 } 248 249 #if defined(__i386__) 250 /* XXX: what about amd64/linux32? */ 251 252 int 253 linux_uselib(struct thread *td, struct linux_uselib_args *args) 254 { 255 struct nameidata ni; 256 struct vnode *vp; 257 struct exec *a_out; 258 struct vattr attr; 259 vm_offset_t vmaddr; 260 unsigned long file_offset; 261 unsigned long bss_size; 262 char *library; 263 ssize_t aresid; 264 int error, locked, writecount; 265 266 LCONVPATHEXIST(td, args->library, &library); 267 268 #ifdef DEBUG 269 if (ldebug(uselib)) 270 printf(ARGS(uselib, "%s"), library); 271 #endif 272 273 a_out = NULL; 274 locked = 0; 275 vp = NULL; 276 277 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1, 278 UIO_SYSSPACE, library, td); 279 error = namei(&ni); 280 LFREEPATH(library); 281 if (error) 282 goto cleanup; 283 284 vp = ni.ni_vp; 285 NDFREE(&ni, NDF_ONLY_PNBUF); 286 287 /* 288 * From here on down, we have a locked vnode that must be unlocked. 289 * XXX: The code below largely duplicates exec_check_permissions(). 290 */ 291 locked = 1; 292 293 /* Writable? */ 294 error = VOP_GET_WRITECOUNT(vp, &writecount); 295 if (error != 0) 296 goto cleanup; 297 if (writecount != 0) { 298 error = ETXTBSY; 299 goto cleanup; 300 } 301 302 /* Executable? */ 303 error = VOP_GETATTR(vp, &attr, td->td_ucred); 304 if (error) 305 goto cleanup; 306 307 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 308 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 309 /* EACCESS is what exec(2) returns. */ 310 error = ENOEXEC; 311 goto cleanup; 312 } 313 314 /* Sensible size? */ 315 if (attr.va_size == 0) { 316 error = ENOEXEC; 317 goto cleanup; 318 } 319 320 /* Can we access it? */ 321 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 322 if (error) 323 goto cleanup; 324 325 /* 326 * XXX: This should use vn_open() so that it is properly authorized, 327 * and to reduce code redundancy all over the place here. 328 * XXX: Not really, it duplicates far more of exec_check_permissions() 329 * than vn_open(). 330 */ 331 #ifdef MAC 332 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 333 if (error) 334 goto cleanup; 335 #endif 336 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 337 if (error) 338 goto cleanup; 339 340 /* Pull in executable header into exec_map */ 341 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 342 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 343 if (error) 344 goto cleanup; 345 346 /* Is it a Linux binary ? */ 347 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 348 error = ENOEXEC; 349 goto cleanup; 350 } 351 352 /* 353 * While we are here, we should REALLY do some more checks 354 */ 355 356 /* Set file/virtual offset based on a.out variant. */ 357 switch ((int)(a_out->a_magic & 0xffff)) { 358 case 0413: /* ZMAGIC */ 359 file_offset = 1024; 360 break; 361 case 0314: /* QMAGIC */ 362 file_offset = 0; 363 break; 364 default: 365 error = ENOEXEC; 366 goto cleanup; 367 } 368 369 bss_size = round_page(a_out->a_bss); 370 371 /* Check various fields in header for validity/bounds. */ 372 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 373 error = ENOEXEC; 374 goto cleanup; 375 } 376 377 /* text + data can't exceed file size */ 378 if (a_out->a_data + a_out->a_text > attr.va_size) { 379 error = EFAULT; 380 goto cleanup; 381 } 382 383 /* 384 * text/data/bss must not exceed limits 385 * XXX - this is not complete. it should check current usage PLUS 386 * the resources needed by this library. 387 */ 388 PROC_LOCK(td->td_proc); 389 if (a_out->a_text > maxtsiz || 390 a_out->a_data + bss_size > lim_cur_proc(td->td_proc, RLIMIT_DATA) || 391 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 392 bss_size) != 0) { 393 PROC_UNLOCK(td->td_proc); 394 error = ENOMEM; 395 goto cleanup; 396 } 397 PROC_UNLOCK(td->td_proc); 398 399 /* 400 * Prevent more writers. 401 * XXX: Note that if any of the VM operations fail below we don't 402 * clear this flag. 403 */ 404 VOP_SET_TEXT(vp); 405 406 /* 407 * Lock no longer needed 408 */ 409 locked = 0; 410 VOP_UNLOCK(vp, 0); 411 412 /* 413 * Check if file_offset page aligned. Currently we cannot handle 414 * misalinged file offsets, and so we read in the entire image 415 * (what a waste). 416 */ 417 if (file_offset & PAGE_MASK) { 418 #ifdef DEBUG 419 printf("uselib: Non page aligned binary %lu\n", file_offset); 420 #endif 421 /* Map text+data read/write/execute */ 422 423 /* a_entry is the load address and is page aligned */ 424 vmaddr = trunc_page(a_out->a_entry); 425 426 /* get anon user mapping, read+write+execute */ 427 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 428 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE, 429 VM_PROT_ALL, VM_PROT_ALL, 0); 430 if (error) 431 goto cleanup; 432 433 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 434 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 435 td->td_ucred, NOCRED, &aresid, td); 436 if (error != 0) 437 goto cleanup; 438 if (aresid != 0) { 439 error = ENOEXEC; 440 goto cleanup; 441 } 442 } else { 443 #ifdef DEBUG 444 printf("uselib: Page aligned binary %lu\n", file_offset); 445 #endif 446 /* 447 * for QMAGIC, a_entry is 20 bytes beyond the load address 448 * to skip the executable header 449 */ 450 vmaddr = trunc_page(a_out->a_entry); 451 452 /* 453 * Map it all into the process's space as a single 454 * copy-on-write "data" segment. 455 */ 456 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 457 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 458 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 459 if (error) 460 goto cleanup; 461 } 462 #ifdef DEBUG 463 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 464 ((long *)vmaddr)[1]); 465 #endif 466 if (bss_size != 0) { 467 /* Calculate BSS start address */ 468 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 469 a_out->a_data; 470 471 /* allocate some 'anon' space */ 472 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 473 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, 474 VM_PROT_ALL, 0); 475 if (error) 476 goto cleanup; 477 } 478 479 cleanup: 480 /* Unlock vnode if needed */ 481 if (locked) 482 VOP_UNLOCK(vp, 0); 483 484 /* Release the temporary mapping. */ 485 if (a_out) 486 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 487 488 return (error); 489 } 490 491 #endif /* __i386__ */ 492 493 int 494 linux_select(struct thread *td, struct linux_select_args *args) 495 { 496 l_timeval ltv; 497 struct timeval tv0, tv1, utv, *tvp; 498 int error; 499 500 #ifdef DEBUG 501 if (ldebug(select)) 502 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 503 (void *)args->readfds, (void *)args->writefds, 504 (void *)args->exceptfds, (void *)args->timeout); 505 #endif 506 507 /* 508 * Store current time for computation of the amount of 509 * time left. 510 */ 511 if (args->timeout) { 512 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 513 goto select_out; 514 utv.tv_sec = ltv.tv_sec; 515 utv.tv_usec = ltv.tv_usec; 516 #ifdef DEBUG 517 if (ldebug(select)) 518 printf(LMSG("incoming timeout (%jd/%ld)"), 519 (intmax_t)utv.tv_sec, utv.tv_usec); 520 #endif 521 522 if (itimerfix(&utv)) { 523 /* 524 * The timeval was invalid. Convert it to something 525 * valid that will act as it does under Linux. 526 */ 527 utv.tv_sec += utv.tv_usec / 1000000; 528 utv.tv_usec %= 1000000; 529 if (utv.tv_usec < 0) { 530 utv.tv_sec -= 1; 531 utv.tv_usec += 1000000; 532 } 533 if (utv.tv_sec < 0) 534 timevalclear(&utv); 535 } 536 microtime(&tv0); 537 tvp = &utv; 538 } else 539 tvp = NULL; 540 541 error = kern_select(td, args->nfds, args->readfds, args->writefds, 542 args->exceptfds, tvp, LINUX_NFDBITS); 543 544 #ifdef DEBUG 545 if (ldebug(select)) 546 printf(LMSG("real select returns %d"), error); 547 #endif 548 if (error) 549 goto select_out; 550 551 if (args->timeout) { 552 if (td->td_retval[0]) { 553 /* 554 * Compute how much time was left of the timeout, 555 * by subtracting the current time and the time 556 * before we started the call, and subtracting 557 * that result from the user-supplied value. 558 */ 559 microtime(&tv1); 560 timevalsub(&tv1, &tv0); 561 timevalsub(&utv, &tv1); 562 if (utv.tv_sec < 0) 563 timevalclear(&utv); 564 } else 565 timevalclear(&utv); 566 #ifdef DEBUG 567 if (ldebug(select)) 568 printf(LMSG("outgoing timeout (%jd/%ld)"), 569 (intmax_t)utv.tv_sec, utv.tv_usec); 570 #endif 571 ltv.tv_sec = utv.tv_sec; 572 ltv.tv_usec = utv.tv_usec; 573 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 574 goto select_out; 575 } 576 577 select_out: 578 #ifdef DEBUG 579 if (ldebug(select)) 580 printf(LMSG("select_out -> %d"), error); 581 #endif 582 return (error); 583 } 584 585 int 586 linux_mremap(struct thread *td, struct linux_mremap_args *args) 587 { 588 struct munmap_args /* { 589 void *addr; 590 size_t len; 591 } */ bsd_args; 592 int error = 0; 593 594 #ifdef DEBUG 595 if (ldebug(mremap)) 596 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 597 (void *)(uintptr_t)args->addr, 598 (unsigned long)args->old_len, 599 (unsigned long)args->new_len, 600 (unsigned long)args->flags); 601 #endif 602 603 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 604 td->td_retval[0] = 0; 605 return (EINVAL); 606 } 607 608 /* 609 * Check for the page alignment. 610 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 611 */ 612 if (args->addr & PAGE_MASK) { 613 td->td_retval[0] = 0; 614 return (EINVAL); 615 } 616 617 args->new_len = round_page(args->new_len); 618 args->old_len = round_page(args->old_len); 619 620 if (args->new_len > args->old_len) { 621 td->td_retval[0] = 0; 622 return (ENOMEM); 623 } 624 625 if (args->new_len < args->old_len) { 626 bsd_args.addr = 627 (caddr_t)((uintptr_t)args->addr + args->new_len); 628 bsd_args.len = args->old_len - args->new_len; 629 error = sys_munmap(td, &bsd_args); 630 } 631 632 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 633 return (error); 634 } 635 636 #define LINUX_MS_ASYNC 0x0001 637 #define LINUX_MS_INVALIDATE 0x0002 638 #define LINUX_MS_SYNC 0x0004 639 640 int 641 linux_msync(struct thread *td, struct linux_msync_args *args) 642 { 643 struct msync_args bsd_args; 644 645 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 646 bsd_args.len = (uintptr_t)args->len; 647 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 648 649 return (sys_msync(td, &bsd_args)); 650 } 651 652 int 653 linux_time(struct thread *td, struct linux_time_args *args) 654 { 655 struct timeval tv; 656 l_time_t tm; 657 int error; 658 659 #ifdef DEBUG 660 if (ldebug(time)) 661 printf(ARGS(time, "*")); 662 #endif 663 664 microtime(&tv); 665 tm = tv.tv_sec; 666 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 667 return (error); 668 td->td_retval[0] = tm; 669 return (0); 670 } 671 672 struct l_times_argv { 673 l_clock_t tms_utime; 674 l_clock_t tms_stime; 675 l_clock_t tms_cutime; 676 l_clock_t tms_cstime; 677 }; 678 679 680 /* 681 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 682 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 683 * auxiliary vector entry. 684 */ 685 #define CLK_TCK 100 686 687 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 688 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 689 690 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 691 CONVNTCK(r) : CONVOTCK(r)) 692 693 int 694 linux_times(struct thread *td, struct linux_times_args *args) 695 { 696 struct timeval tv, utime, stime, cutime, cstime; 697 struct l_times_argv tms; 698 struct proc *p; 699 int error; 700 701 #ifdef DEBUG 702 if (ldebug(times)) 703 printf(ARGS(times, "*")); 704 #endif 705 706 if (args->buf != NULL) { 707 p = td->td_proc; 708 PROC_LOCK(p); 709 PROC_STATLOCK(p); 710 calcru(p, &utime, &stime); 711 PROC_STATUNLOCK(p); 712 calccru(p, &cutime, &cstime); 713 PROC_UNLOCK(p); 714 715 tms.tms_utime = CONVTCK(utime); 716 tms.tms_stime = CONVTCK(stime); 717 718 tms.tms_cutime = CONVTCK(cutime); 719 tms.tms_cstime = CONVTCK(cstime); 720 721 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 722 return (error); 723 } 724 725 microuptime(&tv); 726 td->td_retval[0] = (int)CONVTCK(tv); 727 return (0); 728 } 729 730 int 731 linux_newuname(struct thread *td, struct linux_newuname_args *args) 732 { 733 struct l_new_utsname utsname; 734 char osname[LINUX_MAX_UTSNAME]; 735 char osrelease[LINUX_MAX_UTSNAME]; 736 char *p; 737 738 #ifdef DEBUG 739 if (ldebug(newuname)) 740 printf(ARGS(newuname, "*")); 741 #endif 742 743 linux_get_osname(td, osname); 744 linux_get_osrelease(td, osrelease); 745 746 bzero(&utsname, sizeof(utsname)); 747 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 748 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 749 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 750 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 751 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 752 for (p = utsname.version; *p != '\0'; ++p) 753 if (*p == '\n') { 754 *p = '\0'; 755 break; 756 } 757 strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME); 758 759 return (copyout(&utsname, args->buf, sizeof(utsname))); 760 } 761 762 struct l_utimbuf { 763 l_time_t l_actime; 764 l_time_t l_modtime; 765 }; 766 767 int 768 linux_utime(struct thread *td, struct linux_utime_args *args) 769 { 770 struct timeval tv[2], *tvp; 771 struct l_utimbuf lut; 772 char *fname; 773 int error; 774 775 LCONVPATHEXIST(td, args->fname, &fname); 776 777 #ifdef DEBUG 778 if (ldebug(utime)) 779 printf(ARGS(utime, "%s, *"), fname); 780 #endif 781 782 if (args->times) { 783 if ((error = copyin(args->times, &lut, sizeof lut))) { 784 LFREEPATH(fname); 785 return (error); 786 } 787 tv[0].tv_sec = lut.l_actime; 788 tv[0].tv_usec = 0; 789 tv[1].tv_sec = lut.l_modtime; 790 tv[1].tv_usec = 0; 791 tvp = tv; 792 } else 793 tvp = NULL; 794 795 error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, tvp, 796 UIO_SYSSPACE); 797 LFREEPATH(fname); 798 return (error); 799 } 800 801 int 802 linux_utimes(struct thread *td, struct linux_utimes_args *args) 803 { 804 l_timeval ltv[2]; 805 struct timeval tv[2], *tvp = NULL; 806 char *fname; 807 int error; 808 809 LCONVPATHEXIST(td, args->fname, &fname); 810 811 #ifdef DEBUG 812 if (ldebug(utimes)) 813 printf(ARGS(utimes, "%s, *"), fname); 814 #endif 815 816 if (args->tptr != NULL) { 817 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 818 LFREEPATH(fname); 819 return (error); 820 } 821 tv[0].tv_sec = ltv[0].tv_sec; 822 tv[0].tv_usec = ltv[0].tv_usec; 823 tv[1].tv_sec = ltv[1].tv_sec; 824 tv[1].tv_usec = ltv[1].tv_usec; 825 tvp = tv; 826 } 827 828 error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, 829 tvp, UIO_SYSSPACE); 830 LFREEPATH(fname); 831 return (error); 832 } 833 834 static int 835 linux_utimensat_nsec_valid(l_long nsec) 836 { 837 838 if (nsec == LINUX_UTIME_OMIT || nsec == LINUX_UTIME_NOW) 839 return (0); 840 if (nsec >= 0 && nsec <= 999999999) 841 return (0); 842 return (1); 843 } 844 845 int 846 linux_utimensat(struct thread *td, struct linux_utimensat_args *args) 847 { 848 struct l_timespec l_times[2]; 849 struct timespec times[2], *timesp = NULL; 850 char *path = NULL; 851 int error, dfd, flags = 0; 852 853 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 854 855 #ifdef DEBUG 856 if (ldebug(utimensat)) 857 printf(ARGS(utimensat, "%d, *"), dfd); 858 #endif 859 860 if (args->flags & ~LINUX_AT_SYMLINK_NOFOLLOW) 861 return (EINVAL); 862 863 if (args->times != NULL) { 864 error = copyin(args->times, l_times, sizeof(l_times)); 865 if (error != 0) 866 return (error); 867 868 if (linux_utimensat_nsec_valid(l_times[0].tv_nsec) != 0 || 869 linux_utimensat_nsec_valid(l_times[1].tv_nsec) != 0) 870 return (EINVAL); 871 872 times[0].tv_sec = l_times[0].tv_sec; 873 switch (l_times[0].tv_nsec) 874 { 875 case LINUX_UTIME_OMIT: 876 times[0].tv_nsec = UTIME_OMIT; 877 break; 878 case LINUX_UTIME_NOW: 879 times[0].tv_nsec = UTIME_NOW; 880 break; 881 default: 882 times[0].tv_nsec = l_times[0].tv_nsec; 883 } 884 885 times[1].tv_sec = l_times[1].tv_sec; 886 switch (l_times[1].tv_nsec) 887 { 888 case LINUX_UTIME_OMIT: 889 times[1].tv_nsec = UTIME_OMIT; 890 break; 891 case LINUX_UTIME_NOW: 892 times[1].tv_nsec = UTIME_NOW; 893 break; 894 default: 895 times[1].tv_nsec = l_times[1].tv_nsec; 896 break; 897 } 898 timesp = times; 899 900 /* This breaks POSIX, but is what the Linux kernel does 901 * _on purpose_ (documented in the man page for utimensat(2)), 902 * so we must follow that behaviour. */ 903 if (times[0].tv_nsec == UTIME_OMIT && 904 times[1].tv_nsec == UTIME_OMIT) 905 return (0); 906 } 907 908 if (args->pathname != NULL) 909 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 910 else if (args->flags != 0) 911 return (EINVAL); 912 913 if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) 914 flags |= AT_SYMLINK_NOFOLLOW; 915 916 if (path == NULL) 917 error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE); 918 else { 919 error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp, 920 UIO_SYSSPACE, flags); 921 LFREEPATH(path); 922 } 923 924 return (error); 925 } 926 927 int 928 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 929 { 930 l_timeval ltv[2]; 931 struct timeval tv[2], *tvp = NULL; 932 char *fname; 933 int error, dfd; 934 935 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 936 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 937 938 #ifdef DEBUG 939 if (ldebug(futimesat)) 940 printf(ARGS(futimesat, "%s, *"), fname); 941 #endif 942 943 if (args->utimes != NULL) { 944 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 945 LFREEPATH(fname); 946 return (error); 947 } 948 tv[0].tv_sec = ltv[0].tv_sec; 949 tv[0].tv_usec = ltv[0].tv_usec; 950 tv[1].tv_sec = ltv[1].tv_sec; 951 tv[1].tv_usec = ltv[1].tv_usec; 952 tvp = tv; 953 } 954 955 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 956 LFREEPATH(fname); 957 return (error); 958 } 959 960 int 961 linux_common_wait(struct thread *td, int pid, int *status, 962 int options, struct rusage *ru) 963 { 964 int error, tmpstat; 965 966 error = kern_wait(td, pid, &tmpstat, options, ru); 967 if (error) 968 return (error); 969 970 if (status) { 971 tmpstat &= 0xffff; 972 if (WIFSIGNALED(tmpstat)) 973 tmpstat = (tmpstat & 0xffffff80) | 974 bsd_to_linux_signal(WTERMSIG(tmpstat)); 975 else if (WIFSTOPPED(tmpstat)) 976 tmpstat = (tmpstat & 0xffff00ff) | 977 (bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8); 978 else if (WIFCONTINUED(tmpstat)) 979 tmpstat = 0xffff; 980 error = copyout(&tmpstat, status, sizeof(int)); 981 } 982 983 return (error); 984 } 985 986 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 987 int 988 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 989 { 990 struct linux_wait4_args wait4_args; 991 992 #ifdef DEBUG 993 if (ldebug(waitpid)) 994 printf(ARGS(waitpid, "%d, %p, %d"), 995 args->pid, (void *)args->status, args->options); 996 #endif 997 998 wait4_args.pid = args->pid; 999 wait4_args.status = args->status; 1000 wait4_args.options = args->options; 1001 wait4_args.rusage = NULL; 1002 1003 return (linux_wait4(td, &wait4_args)); 1004 } 1005 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1006 1007 int 1008 linux_wait4(struct thread *td, struct linux_wait4_args *args) 1009 { 1010 int error, options; 1011 struct rusage ru, *rup; 1012 1013 #ifdef DEBUG 1014 if (ldebug(wait4)) 1015 printf(ARGS(wait4, "%d, %p, %d, %p"), 1016 args->pid, (void *)args->status, args->options, 1017 (void *)args->rusage); 1018 #endif 1019 if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG | 1020 LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL)) 1021 return (EINVAL); 1022 1023 options = WEXITED; 1024 linux_to_bsd_waitopts(args->options, &options); 1025 1026 if (args->rusage != NULL) 1027 rup = &ru; 1028 else 1029 rup = NULL; 1030 error = linux_common_wait(td, args->pid, args->status, options, rup); 1031 if (error != 0) 1032 return (error); 1033 if (args->rusage != NULL) 1034 error = linux_copyout_rusage(&ru, args->rusage); 1035 return (error); 1036 } 1037 1038 int 1039 linux_waitid(struct thread *td, struct linux_waitid_args *args) 1040 { 1041 int status, options, sig; 1042 struct __wrusage wru; 1043 siginfo_t siginfo; 1044 l_siginfo_t lsi; 1045 idtype_t idtype; 1046 struct proc *p; 1047 int error; 1048 1049 options = 0; 1050 linux_to_bsd_waitopts(args->options, &options); 1051 1052 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 1053 return (EINVAL); 1054 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 1055 return (EINVAL); 1056 1057 switch (args->idtype) { 1058 case LINUX_P_ALL: 1059 idtype = P_ALL; 1060 break; 1061 case LINUX_P_PID: 1062 if (args->id <= 0) 1063 return (EINVAL); 1064 idtype = P_PID; 1065 break; 1066 case LINUX_P_PGID: 1067 if (args->id <= 0) 1068 return (EINVAL); 1069 idtype = P_PGID; 1070 break; 1071 default: 1072 return (EINVAL); 1073 } 1074 1075 error = kern_wait6(td, idtype, args->id, &status, options, 1076 &wru, &siginfo); 1077 if (error != 0) 1078 return (error); 1079 if (args->rusage != NULL) { 1080 error = linux_copyout_rusage(&wru.wru_children, 1081 args->rusage); 1082 if (error != 0) 1083 return (error); 1084 } 1085 if (args->info != NULL) { 1086 p = td->td_proc; 1087 if (td->td_retval[0] == 0) 1088 bzero(&lsi, sizeof(lsi)); 1089 else { 1090 sig = bsd_to_linux_signal(siginfo.si_signo); 1091 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 1092 } 1093 error = copyout(&lsi, args->info, sizeof(lsi)); 1094 } 1095 td->td_retval[0] = 0; 1096 1097 return (error); 1098 } 1099 1100 int 1101 linux_mknod(struct thread *td, struct linux_mknod_args *args) 1102 { 1103 char *path; 1104 int error; 1105 1106 LCONVPATHCREAT(td, args->path, &path); 1107 1108 #ifdef DEBUG 1109 if (ldebug(mknod)) 1110 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1111 (uintmax_t)args->dev); 1112 #endif 1113 1114 switch (args->mode & S_IFMT) { 1115 case S_IFIFO: 1116 case S_IFSOCK: 1117 error = kern_mkfifoat(td, AT_FDCWD, path, UIO_SYSSPACE, 1118 args->mode); 1119 break; 1120 1121 case S_IFCHR: 1122 case S_IFBLK: 1123 error = kern_mknodat(td, AT_FDCWD, path, UIO_SYSSPACE, 1124 args->mode, args->dev); 1125 break; 1126 1127 case S_IFDIR: 1128 error = EPERM; 1129 break; 1130 1131 case 0: 1132 args->mode |= S_IFREG; 1133 /* FALLTHROUGH */ 1134 case S_IFREG: 1135 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, 1136 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1137 if (error == 0) 1138 kern_close(td, td->td_retval[0]); 1139 break; 1140 1141 default: 1142 error = EINVAL; 1143 break; 1144 } 1145 LFREEPATH(path); 1146 return (error); 1147 } 1148 1149 int 1150 linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1151 { 1152 char *path; 1153 int error, dfd; 1154 1155 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1156 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1157 1158 #ifdef DEBUG 1159 if (ldebug(mknodat)) 1160 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1161 #endif 1162 1163 switch (args->mode & S_IFMT) { 1164 case S_IFIFO: 1165 case S_IFSOCK: 1166 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1167 break; 1168 1169 case S_IFCHR: 1170 case S_IFBLK: 1171 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1172 args->dev); 1173 break; 1174 1175 case S_IFDIR: 1176 error = EPERM; 1177 break; 1178 1179 case 0: 1180 args->mode |= S_IFREG; 1181 /* FALLTHROUGH */ 1182 case S_IFREG: 1183 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1184 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1185 if (error == 0) 1186 kern_close(td, td->td_retval[0]); 1187 break; 1188 1189 default: 1190 error = EINVAL; 1191 break; 1192 } 1193 LFREEPATH(path); 1194 return (error); 1195 } 1196 1197 /* 1198 * UGH! This is just about the dumbest idea I've ever heard!! 1199 */ 1200 int 1201 linux_personality(struct thread *td, struct linux_personality_args *args) 1202 { 1203 struct linux_pemuldata *pem; 1204 struct proc *p = td->td_proc; 1205 uint32_t old; 1206 1207 #ifdef DEBUG 1208 if (ldebug(personality)) 1209 printf(ARGS(personality, "%u"), args->per); 1210 #endif 1211 1212 PROC_LOCK(p); 1213 pem = pem_find(p); 1214 old = pem->persona; 1215 if (args->per != 0xffffffff) 1216 pem->persona = args->per; 1217 PROC_UNLOCK(p); 1218 1219 td->td_retval[0] = old; 1220 return (0); 1221 } 1222 1223 struct l_itimerval { 1224 l_timeval it_interval; 1225 l_timeval it_value; 1226 }; 1227 1228 #define B2L_ITIMERVAL(bip, lip) \ 1229 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1230 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1231 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1232 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1233 1234 int 1235 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1236 { 1237 int error; 1238 struct l_itimerval ls; 1239 struct itimerval aitv, oitv; 1240 1241 #ifdef DEBUG 1242 if (ldebug(setitimer)) 1243 printf(ARGS(setitimer, "%p, %p"), 1244 (void *)uap->itv, (void *)uap->oitv); 1245 #endif 1246 1247 if (uap->itv == NULL) { 1248 uap->itv = uap->oitv; 1249 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1250 } 1251 1252 error = copyin(uap->itv, &ls, sizeof(ls)); 1253 if (error != 0) 1254 return (error); 1255 B2L_ITIMERVAL(&aitv, &ls); 1256 #ifdef DEBUG 1257 if (ldebug(setitimer)) { 1258 printf("setitimer: value: sec: %jd, usec: %ld\n", 1259 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1260 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1261 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1262 } 1263 #endif 1264 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1265 if (error != 0 || uap->oitv == NULL) 1266 return (error); 1267 B2L_ITIMERVAL(&ls, &oitv); 1268 1269 return (copyout(&ls, uap->oitv, sizeof(ls))); 1270 } 1271 1272 int 1273 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1274 { 1275 int error; 1276 struct l_itimerval ls; 1277 struct itimerval aitv; 1278 1279 #ifdef DEBUG 1280 if (ldebug(getitimer)) 1281 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1282 #endif 1283 error = kern_getitimer(td, uap->which, &aitv); 1284 if (error != 0) 1285 return (error); 1286 B2L_ITIMERVAL(&ls, &aitv); 1287 return (copyout(&ls, uap->itv, sizeof(ls))); 1288 } 1289 1290 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1291 int 1292 linux_nice(struct thread *td, struct linux_nice_args *args) 1293 { 1294 struct setpriority_args bsd_args; 1295 1296 bsd_args.which = PRIO_PROCESS; 1297 bsd_args.who = 0; /* current process */ 1298 bsd_args.prio = args->inc; 1299 return (sys_setpriority(td, &bsd_args)); 1300 } 1301 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1302 1303 int 1304 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1305 { 1306 struct ucred *newcred, *oldcred; 1307 l_gid_t *linux_gidset; 1308 gid_t *bsd_gidset; 1309 int ngrp, error; 1310 struct proc *p; 1311 1312 ngrp = args->gidsetsize; 1313 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1314 return (EINVAL); 1315 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1316 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1317 if (error) 1318 goto out; 1319 newcred = crget(); 1320 crextend(newcred, ngrp + 1); 1321 p = td->td_proc; 1322 PROC_LOCK(p); 1323 oldcred = p->p_ucred; 1324 crcopy(newcred, oldcred); 1325 1326 /* 1327 * cr_groups[0] holds egid. Setting the whole set from 1328 * the supplied set will cause egid to be changed too. 1329 * Keep cr_groups[0] unchanged to prevent that. 1330 */ 1331 1332 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1333 PROC_UNLOCK(p); 1334 crfree(newcred); 1335 goto out; 1336 } 1337 1338 if (ngrp > 0) { 1339 newcred->cr_ngroups = ngrp + 1; 1340 1341 bsd_gidset = newcred->cr_groups; 1342 ngrp--; 1343 while (ngrp >= 0) { 1344 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1345 ngrp--; 1346 } 1347 } else 1348 newcred->cr_ngroups = 1; 1349 1350 setsugid(p); 1351 proc_set_cred(p, newcred); 1352 PROC_UNLOCK(p); 1353 crfree(oldcred); 1354 error = 0; 1355 out: 1356 free(linux_gidset, M_LINUX); 1357 return (error); 1358 } 1359 1360 int 1361 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1362 { 1363 struct ucred *cred; 1364 l_gid_t *linux_gidset; 1365 gid_t *bsd_gidset; 1366 int bsd_gidsetsz, ngrp, error; 1367 1368 cred = td->td_ucred; 1369 bsd_gidset = cred->cr_groups; 1370 bsd_gidsetsz = cred->cr_ngroups - 1; 1371 1372 /* 1373 * cr_groups[0] holds egid. Returning the whole set 1374 * here will cause a duplicate. Exclude cr_groups[0] 1375 * to prevent that. 1376 */ 1377 1378 if ((ngrp = args->gidsetsize) == 0) { 1379 td->td_retval[0] = bsd_gidsetsz; 1380 return (0); 1381 } 1382 1383 if (ngrp < bsd_gidsetsz) 1384 return (EINVAL); 1385 1386 ngrp = 0; 1387 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1388 M_LINUX, M_WAITOK); 1389 while (ngrp < bsd_gidsetsz) { 1390 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1391 ngrp++; 1392 } 1393 1394 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1395 free(linux_gidset, M_LINUX); 1396 if (error) 1397 return (error); 1398 1399 td->td_retval[0] = ngrp; 1400 return (0); 1401 } 1402 1403 int 1404 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1405 { 1406 struct rlimit bsd_rlim; 1407 struct l_rlimit rlim; 1408 u_int which; 1409 int error; 1410 1411 #ifdef DEBUG 1412 if (ldebug(setrlimit)) 1413 printf(ARGS(setrlimit, "%d, %p"), 1414 args->resource, (void *)args->rlim); 1415 #endif 1416 1417 if (args->resource >= LINUX_RLIM_NLIMITS) 1418 return (EINVAL); 1419 1420 which = linux_to_bsd_resource[args->resource]; 1421 if (which == -1) 1422 return (EINVAL); 1423 1424 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1425 if (error) 1426 return (error); 1427 1428 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1429 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1430 return (kern_setrlimit(td, which, &bsd_rlim)); 1431 } 1432 1433 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1434 int 1435 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1436 { 1437 struct l_rlimit rlim; 1438 struct rlimit bsd_rlim; 1439 u_int which; 1440 1441 #ifdef DEBUG 1442 if (ldebug(old_getrlimit)) 1443 printf(ARGS(old_getrlimit, "%d, %p"), 1444 args->resource, (void *)args->rlim); 1445 #endif 1446 1447 if (args->resource >= LINUX_RLIM_NLIMITS) 1448 return (EINVAL); 1449 1450 which = linux_to_bsd_resource[args->resource]; 1451 if (which == -1) 1452 return (EINVAL); 1453 1454 lim_rlimit(td, which, &bsd_rlim); 1455 1456 #ifdef COMPAT_LINUX32 1457 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1458 if (rlim.rlim_cur == UINT_MAX) 1459 rlim.rlim_cur = INT_MAX; 1460 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1461 if (rlim.rlim_max == UINT_MAX) 1462 rlim.rlim_max = INT_MAX; 1463 #else 1464 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1465 if (rlim.rlim_cur == ULONG_MAX) 1466 rlim.rlim_cur = LONG_MAX; 1467 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1468 if (rlim.rlim_max == ULONG_MAX) 1469 rlim.rlim_max = LONG_MAX; 1470 #endif 1471 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1472 } 1473 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1474 1475 int 1476 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1477 { 1478 struct l_rlimit rlim; 1479 struct rlimit bsd_rlim; 1480 u_int which; 1481 1482 #ifdef DEBUG 1483 if (ldebug(getrlimit)) 1484 printf(ARGS(getrlimit, "%d, %p"), 1485 args->resource, (void *)args->rlim); 1486 #endif 1487 1488 if (args->resource >= LINUX_RLIM_NLIMITS) 1489 return (EINVAL); 1490 1491 which = linux_to_bsd_resource[args->resource]; 1492 if (which == -1) 1493 return (EINVAL); 1494 1495 lim_rlimit(td, which, &bsd_rlim); 1496 1497 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1498 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1499 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1500 } 1501 1502 int 1503 linux_sched_setscheduler(struct thread *td, 1504 struct linux_sched_setscheduler_args *args) 1505 { 1506 struct sched_param sched_param; 1507 struct thread *tdt; 1508 int error, policy; 1509 1510 #ifdef DEBUG 1511 if (ldebug(sched_setscheduler)) 1512 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1513 args->pid, args->policy, (const void *)args->param); 1514 #endif 1515 1516 switch (args->policy) { 1517 case LINUX_SCHED_OTHER: 1518 policy = SCHED_OTHER; 1519 break; 1520 case LINUX_SCHED_FIFO: 1521 policy = SCHED_FIFO; 1522 break; 1523 case LINUX_SCHED_RR: 1524 policy = SCHED_RR; 1525 break; 1526 default: 1527 return (EINVAL); 1528 } 1529 1530 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1531 if (error) 1532 return (error); 1533 1534 tdt = linux_tdfind(td, args->pid, -1); 1535 if (tdt == NULL) 1536 return (ESRCH); 1537 1538 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1539 PROC_UNLOCK(tdt->td_proc); 1540 return (error); 1541 } 1542 1543 int 1544 linux_sched_getscheduler(struct thread *td, 1545 struct linux_sched_getscheduler_args *args) 1546 { 1547 struct thread *tdt; 1548 int error, policy; 1549 1550 #ifdef DEBUG 1551 if (ldebug(sched_getscheduler)) 1552 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1553 #endif 1554 1555 tdt = linux_tdfind(td, args->pid, -1); 1556 if (tdt == NULL) 1557 return (ESRCH); 1558 1559 error = kern_sched_getscheduler(td, tdt, &policy); 1560 PROC_UNLOCK(tdt->td_proc); 1561 1562 switch (policy) { 1563 case SCHED_OTHER: 1564 td->td_retval[0] = LINUX_SCHED_OTHER; 1565 break; 1566 case SCHED_FIFO: 1567 td->td_retval[0] = LINUX_SCHED_FIFO; 1568 break; 1569 case SCHED_RR: 1570 td->td_retval[0] = LINUX_SCHED_RR; 1571 break; 1572 } 1573 return (error); 1574 } 1575 1576 int 1577 linux_sched_get_priority_max(struct thread *td, 1578 struct linux_sched_get_priority_max_args *args) 1579 { 1580 struct sched_get_priority_max_args bsd; 1581 1582 #ifdef DEBUG 1583 if (ldebug(sched_get_priority_max)) 1584 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1585 #endif 1586 1587 switch (args->policy) { 1588 case LINUX_SCHED_OTHER: 1589 bsd.policy = SCHED_OTHER; 1590 break; 1591 case LINUX_SCHED_FIFO: 1592 bsd.policy = SCHED_FIFO; 1593 break; 1594 case LINUX_SCHED_RR: 1595 bsd.policy = SCHED_RR; 1596 break; 1597 default: 1598 return (EINVAL); 1599 } 1600 return (sys_sched_get_priority_max(td, &bsd)); 1601 } 1602 1603 int 1604 linux_sched_get_priority_min(struct thread *td, 1605 struct linux_sched_get_priority_min_args *args) 1606 { 1607 struct sched_get_priority_min_args bsd; 1608 1609 #ifdef DEBUG 1610 if (ldebug(sched_get_priority_min)) 1611 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1612 #endif 1613 1614 switch (args->policy) { 1615 case LINUX_SCHED_OTHER: 1616 bsd.policy = SCHED_OTHER; 1617 break; 1618 case LINUX_SCHED_FIFO: 1619 bsd.policy = SCHED_FIFO; 1620 break; 1621 case LINUX_SCHED_RR: 1622 bsd.policy = SCHED_RR; 1623 break; 1624 default: 1625 return (EINVAL); 1626 } 1627 return (sys_sched_get_priority_min(td, &bsd)); 1628 } 1629 1630 #define REBOOT_CAD_ON 0x89abcdef 1631 #define REBOOT_CAD_OFF 0 1632 #define REBOOT_HALT 0xcdef0123 1633 #define REBOOT_RESTART 0x01234567 1634 #define REBOOT_RESTART2 0xA1B2C3D4 1635 #define REBOOT_POWEROFF 0x4321FEDC 1636 #define REBOOT_MAGIC1 0xfee1dead 1637 #define REBOOT_MAGIC2 0x28121969 1638 #define REBOOT_MAGIC2A 0x05121996 1639 #define REBOOT_MAGIC2B 0x16041998 1640 1641 int 1642 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1643 { 1644 struct reboot_args bsd_args; 1645 1646 #ifdef DEBUG 1647 if (ldebug(reboot)) 1648 printf(ARGS(reboot, "0x%x"), args->cmd); 1649 #endif 1650 1651 if (args->magic1 != REBOOT_MAGIC1) 1652 return (EINVAL); 1653 1654 switch (args->magic2) { 1655 case REBOOT_MAGIC2: 1656 case REBOOT_MAGIC2A: 1657 case REBOOT_MAGIC2B: 1658 break; 1659 default: 1660 return (EINVAL); 1661 } 1662 1663 switch (args->cmd) { 1664 case REBOOT_CAD_ON: 1665 case REBOOT_CAD_OFF: 1666 return (priv_check(td, PRIV_REBOOT)); 1667 case REBOOT_HALT: 1668 bsd_args.opt = RB_HALT; 1669 break; 1670 case REBOOT_RESTART: 1671 case REBOOT_RESTART2: 1672 bsd_args.opt = 0; 1673 break; 1674 case REBOOT_POWEROFF: 1675 bsd_args.opt = RB_POWEROFF; 1676 break; 1677 default: 1678 return (EINVAL); 1679 } 1680 return (sys_reboot(td, &bsd_args)); 1681 } 1682 1683 1684 /* 1685 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1686 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1687 * are assumed to be preserved. The following lightweight syscalls fixes 1688 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1689 * 1690 * linux_getpid() - MP SAFE 1691 * linux_getgid() - MP SAFE 1692 * linux_getuid() - MP SAFE 1693 */ 1694 1695 int 1696 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1697 { 1698 1699 #ifdef DEBUG 1700 if (ldebug(getpid)) 1701 printf(ARGS(getpid, "")); 1702 #endif 1703 td->td_retval[0] = td->td_proc->p_pid; 1704 1705 return (0); 1706 } 1707 1708 int 1709 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1710 { 1711 struct linux_emuldata *em; 1712 1713 #ifdef DEBUG 1714 if (ldebug(gettid)) 1715 printf(ARGS(gettid, "")); 1716 #endif 1717 1718 em = em_find(td); 1719 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1720 1721 td->td_retval[0] = em->em_tid; 1722 1723 return (0); 1724 } 1725 1726 1727 int 1728 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1729 { 1730 1731 #ifdef DEBUG 1732 if (ldebug(getppid)) 1733 printf(ARGS(getppid, "")); 1734 #endif 1735 1736 PROC_LOCK(td->td_proc); 1737 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1738 PROC_UNLOCK(td->td_proc); 1739 return (0); 1740 } 1741 1742 int 1743 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1744 { 1745 1746 #ifdef DEBUG 1747 if (ldebug(getgid)) 1748 printf(ARGS(getgid, "")); 1749 #endif 1750 1751 td->td_retval[0] = td->td_ucred->cr_rgid; 1752 return (0); 1753 } 1754 1755 int 1756 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1757 { 1758 1759 #ifdef DEBUG 1760 if (ldebug(getuid)) 1761 printf(ARGS(getuid, "")); 1762 #endif 1763 1764 td->td_retval[0] = td->td_ucred->cr_ruid; 1765 return (0); 1766 } 1767 1768 1769 int 1770 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1771 { 1772 struct getsid_args bsd; 1773 1774 #ifdef DEBUG 1775 if (ldebug(getsid)) 1776 printf(ARGS(getsid, "%i"), args->pid); 1777 #endif 1778 1779 bsd.pid = args->pid; 1780 return (sys_getsid(td, &bsd)); 1781 } 1782 1783 int 1784 linux_nosys(struct thread *td, struct nosys_args *ignore) 1785 { 1786 1787 return (ENOSYS); 1788 } 1789 1790 int 1791 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1792 { 1793 struct getpriority_args bsd_args; 1794 int error; 1795 1796 #ifdef DEBUG 1797 if (ldebug(getpriority)) 1798 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1799 #endif 1800 1801 bsd_args.which = args->which; 1802 bsd_args.who = args->who; 1803 error = sys_getpriority(td, &bsd_args); 1804 td->td_retval[0] = 20 - td->td_retval[0]; 1805 return (error); 1806 } 1807 1808 int 1809 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1810 { 1811 int name[2]; 1812 1813 #ifdef DEBUG 1814 if (ldebug(sethostname)) 1815 printf(ARGS(sethostname, "*, %i"), args->len); 1816 #endif 1817 1818 name[0] = CTL_KERN; 1819 name[1] = KERN_HOSTNAME; 1820 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1821 args->len, 0, 0)); 1822 } 1823 1824 int 1825 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1826 { 1827 int name[2]; 1828 1829 #ifdef DEBUG 1830 if (ldebug(setdomainname)) 1831 printf(ARGS(setdomainname, "*, %i"), args->len); 1832 #endif 1833 1834 name[0] = CTL_KERN; 1835 name[1] = KERN_NISDOMAINNAME; 1836 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1837 args->len, 0, 0)); 1838 } 1839 1840 int 1841 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1842 { 1843 1844 #ifdef DEBUG 1845 if (ldebug(exit_group)) 1846 printf(ARGS(exit_group, "%i"), args->error_code); 1847 #endif 1848 1849 LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid, 1850 args->error_code); 1851 1852 /* 1853 * XXX: we should send a signal to the parent if 1854 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1855 * as it doesnt occur often. 1856 */ 1857 exit1(td, args->error_code, 0); 1858 /* NOTREACHED */ 1859 } 1860 1861 #define _LINUX_CAPABILITY_VERSION 0x19980330 1862 1863 struct l_user_cap_header { 1864 l_int version; 1865 l_int pid; 1866 }; 1867 1868 struct l_user_cap_data { 1869 l_int effective; 1870 l_int permitted; 1871 l_int inheritable; 1872 }; 1873 1874 int 1875 linux_capget(struct thread *td, struct linux_capget_args *args) 1876 { 1877 struct l_user_cap_header luch; 1878 struct l_user_cap_data lucd; 1879 int error; 1880 1881 if (args->hdrp == NULL) 1882 return (EFAULT); 1883 1884 error = copyin(args->hdrp, &luch, sizeof(luch)); 1885 if (error != 0) 1886 return (error); 1887 1888 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1889 luch.version = _LINUX_CAPABILITY_VERSION; 1890 error = copyout(&luch, args->hdrp, sizeof(luch)); 1891 if (error) 1892 return (error); 1893 return (EINVAL); 1894 } 1895 1896 if (luch.pid) 1897 return (EPERM); 1898 1899 if (args->datap) { 1900 /* 1901 * The current implementation doesn't support setting 1902 * a capability (it's essentially a stub) so indicate 1903 * that no capabilities are currently set or available 1904 * to request. 1905 */ 1906 bzero (&lucd, sizeof(lucd)); 1907 error = copyout(&lucd, args->datap, sizeof(lucd)); 1908 } 1909 1910 return (error); 1911 } 1912 1913 int 1914 linux_capset(struct thread *td, struct linux_capset_args *args) 1915 { 1916 struct l_user_cap_header luch; 1917 struct l_user_cap_data lucd; 1918 int error; 1919 1920 if (args->hdrp == NULL || args->datap == NULL) 1921 return (EFAULT); 1922 1923 error = copyin(args->hdrp, &luch, sizeof(luch)); 1924 if (error != 0) 1925 return (error); 1926 1927 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1928 luch.version = _LINUX_CAPABILITY_VERSION; 1929 error = copyout(&luch, args->hdrp, sizeof(luch)); 1930 if (error) 1931 return (error); 1932 return (EINVAL); 1933 } 1934 1935 if (luch.pid) 1936 return (EPERM); 1937 1938 error = copyin(args->datap, &lucd, sizeof(lucd)); 1939 if (error != 0) 1940 return (error); 1941 1942 /* We currently don't support setting any capabilities. */ 1943 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1944 linux_msg(td, 1945 "capset effective=0x%x, permitted=0x%x, " 1946 "inheritable=0x%x is not implemented", 1947 (int)lucd.effective, (int)lucd.permitted, 1948 (int)lucd.inheritable); 1949 return (EPERM); 1950 } 1951 1952 return (0); 1953 } 1954 1955 int 1956 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1957 { 1958 int error = 0, max_size; 1959 struct proc *p = td->td_proc; 1960 char comm[LINUX_MAX_COMM_LEN]; 1961 struct linux_emuldata *em; 1962 int pdeath_signal; 1963 1964 #ifdef DEBUG 1965 if (ldebug(prctl)) 1966 printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option, 1967 (uintmax_t)args->arg2, (uintmax_t)args->arg3, 1968 (uintmax_t)args->arg4, (uintmax_t)args->arg5); 1969 #endif 1970 1971 switch (args->option) { 1972 case LINUX_PR_SET_PDEATHSIG: 1973 if (!LINUX_SIG_VALID(args->arg2)) 1974 return (EINVAL); 1975 em = em_find(td); 1976 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1977 em->pdeath_signal = args->arg2; 1978 break; 1979 case LINUX_PR_GET_PDEATHSIG: 1980 em = em_find(td); 1981 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1982 pdeath_signal = em->pdeath_signal; 1983 error = copyout(&pdeath_signal, 1984 (void *)(register_t)args->arg2, 1985 sizeof(pdeath_signal)); 1986 break; 1987 case LINUX_PR_GET_KEEPCAPS: 1988 /* 1989 * Indicate that we always clear the effective and 1990 * permitted capability sets when the user id becomes 1991 * non-zero (actually the capability sets are simply 1992 * always zero in the current implementation). 1993 */ 1994 td->td_retval[0] = 0; 1995 break; 1996 case LINUX_PR_SET_KEEPCAPS: 1997 /* 1998 * Ignore requests to keep the effective and permitted 1999 * capability sets when the user id becomes non-zero. 2000 */ 2001 break; 2002 case LINUX_PR_SET_NAME: 2003 /* 2004 * To be on the safe side we need to make sure to not 2005 * overflow the size a linux program expects. We already 2006 * do this here in the copyin, so that we don't need to 2007 * check on copyout. 2008 */ 2009 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 2010 error = copyinstr((void *)(register_t)args->arg2, comm, 2011 max_size, NULL); 2012 2013 /* Linux silently truncates the name if it is too long. */ 2014 if (error == ENAMETOOLONG) { 2015 /* 2016 * XXX: copyinstr() isn't documented to populate the 2017 * array completely, so do a copyin() to be on the 2018 * safe side. This should be changed in case 2019 * copyinstr() is changed to guarantee this. 2020 */ 2021 error = copyin((void *)(register_t)args->arg2, comm, 2022 max_size - 1); 2023 comm[max_size - 1] = '\0'; 2024 } 2025 if (error) 2026 return (error); 2027 2028 PROC_LOCK(p); 2029 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 2030 PROC_UNLOCK(p); 2031 break; 2032 case LINUX_PR_GET_NAME: 2033 PROC_LOCK(p); 2034 strlcpy(comm, p->p_comm, sizeof(comm)); 2035 PROC_UNLOCK(p); 2036 error = copyout(comm, (void *)(register_t)args->arg2, 2037 strlen(comm) + 1); 2038 break; 2039 default: 2040 error = EINVAL; 2041 break; 2042 } 2043 2044 return (error); 2045 } 2046 2047 int 2048 linux_sched_setparam(struct thread *td, 2049 struct linux_sched_setparam_args *uap) 2050 { 2051 struct sched_param sched_param; 2052 struct thread *tdt; 2053 int error; 2054 2055 #ifdef DEBUG 2056 if (ldebug(sched_setparam)) 2057 printf(ARGS(sched_setparam, "%d, *"), uap->pid); 2058 #endif 2059 2060 error = copyin(uap->param, &sched_param, sizeof(sched_param)); 2061 if (error) 2062 return (error); 2063 2064 tdt = linux_tdfind(td, uap->pid, -1); 2065 if (tdt == NULL) 2066 return (ESRCH); 2067 2068 error = kern_sched_setparam(td, tdt, &sched_param); 2069 PROC_UNLOCK(tdt->td_proc); 2070 return (error); 2071 } 2072 2073 int 2074 linux_sched_getparam(struct thread *td, 2075 struct linux_sched_getparam_args *uap) 2076 { 2077 struct sched_param sched_param; 2078 struct thread *tdt; 2079 int error; 2080 2081 #ifdef DEBUG 2082 if (ldebug(sched_getparam)) 2083 printf(ARGS(sched_getparam, "%d, *"), uap->pid); 2084 #endif 2085 2086 tdt = linux_tdfind(td, uap->pid, -1); 2087 if (tdt == NULL) 2088 return (ESRCH); 2089 2090 error = kern_sched_getparam(td, tdt, &sched_param); 2091 PROC_UNLOCK(tdt->td_proc); 2092 if (error == 0) 2093 error = copyout(&sched_param, uap->param, 2094 sizeof(sched_param)); 2095 return (error); 2096 } 2097 2098 /* 2099 * Get affinity of a process. 2100 */ 2101 int 2102 linux_sched_getaffinity(struct thread *td, 2103 struct linux_sched_getaffinity_args *args) 2104 { 2105 int error; 2106 struct thread *tdt; 2107 struct cpuset_getaffinity_args cga; 2108 2109 #ifdef DEBUG 2110 if (ldebug(sched_getaffinity)) 2111 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2112 args->len); 2113 #endif 2114 if (args->len < sizeof(cpuset_t)) 2115 return (EINVAL); 2116 2117 tdt = linux_tdfind(td, args->pid, -1); 2118 if (tdt == NULL) 2119 return (ESRCH); 2120 2121 PROC_UNLOCK(tdt->td_proc); 2122 cga.level = CPU_LEVEL_WHICH; 2123 cga.which = CPU_WHICH_TID; 2124 cga.id = tdt->td_tid; 2125 cga.cpusetsize = sizeof(cpuset_t); 2126 cga.mask = (cpuset_t *) args->user_mask_ptr; 2127 2128 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 2129 td->td_retval[0] = sizeof(cpuset_t); 2130 2131 return (error); 2132 } 2133 2134 /* 2135 * Set affinity of a process. 2136 */ 2137 int 2138 linux_sched_setaffinity(struct thread *td, 2139 struct linux_sched_setaffinity_args *args) 2140 { 2141 struct cpuset_setaffinity_args csa; 2142 struct thread *tdt; 2143 2144 #ifdef DEBUG 2145 if (ldebug(sched_setaffinity)) 2146 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2147 args->len); 2148 #endif 2149 if (args->len < sizeof(cpuset_t)) 2150 return (EINVAL); 2151 2152 tdt = linux_tdfind(td, args->pid, -1); 2153 if (tdt == NULL) 2154 return (ESRCH); 2155 2156 PROC_UNLOCK(tdt->td_proc); 2157 csa.level = CPU_LEVEL_WHICH; 2158 csa.which = CPU_WHICH_TID; 2159 csa.id = tdt->td_tid; 2160 csa.cpusetsize = sizeof(cpuset_t); 2161 csa.mask = (cpuset_t *) args->user_mask_ptr; 2162 2163 return (sys_cpuset_setaffinity(td, &csa)); 2164 } 2165 2166 struct linux_rlimit64 { 2167 uint64_t rlim_cur; 2168 uint64_t rlim_max; 2169 }; 2170 2171 int 2172 linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2173 { 2174 struct rlimit rlim, nrlim; 2175 struct linux_rlimit64 lrlim; 2176 struct proc *p; 2177 u_int which; 2178 int flags; 2179 int error; 2180 2181 #ifdef DEBUG 2182 if (ldebug(prlimit64)) 2183 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2184 args->resource, (void *)args->new, (void *)args->old); 2185 #endif 2186 2187 if (args->resource >= LINUX_RLIM_NLIMITS) 2188 return (EINVAL); 2189 2190 which = linux_to_bsd_resource[args->resource]; 2191 if (which == -1) 2192 return (EINVAL); 2193 2194 if (args->new != NULL) { 2195 /* 2196 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2197 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2198 * as INFINITY so we do not need a conversion even. 2199 */ 2200 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2201 if (error != 0) 2202 return (error); 2203 } 2204 2205 flags = PGET_HOLD | PGET_NOTWEXIT; 2206 if (args->new != NULL) 2207 flags |= PGET_CANDEBUG; 2208 else 2209 flags |= PGET_CANSEE; 2210 error = pget(args->pid, flags, &p); 2211 if (error != 0) 2212 return (error); 2213 2214 if (args->old != NULL) { 2215 PROC_LOCK(p); 2216 lim_rlimit_proc(p, which, &rlim); 2217 PROC_UNLOCK(p); 2218 if (rlim.rlim_cur == RLIM_INFINITY) 2219 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2220 else 2221 lrlim.rlim_cur = rlim.rlim_cur; 2222 if (rlim.rlim_max == RLIM_INFINITY) 2223 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2224 else 2225 lrlim.rlim_max = rlim.rlim_max; 2226 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2227 if (error != 0) 2228 goto out; 2229 } 2230 2231 if (args->new != NULL) 2232 error = kern_proc_setrlimit(td, p, which, &nrlim); 2233 2234 out: 2235 PRELE(p); 2236 return (error); 2237 } 2238 2239 int 2240 linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2241 { 2242 struct timeval utv, tv0, tv1, *tvp; 2243 struct l_pselect6arg lpse6; 2244 struct l_timespec lts; 2245 struct timespec uts; 2246 l_sigset_t l_ss; 2247 sigset_t *ssp; 2248 sigset_t ss; 2249 int error; 2250 2251 ssp = NULL; 2252 if (args->sig != NULL) { 2253 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2254 if (error != 0) 2255 return (error); 2256 if (lpse6.ss_len != sizeof(l_ss)) 2257 return (EINVAL); 2258 if (lpse6.ss != 0) { 2259 error = copyin(PTRIN(lpse6.ss), &l_ss, 2260 sizeof(l_ss)); 2261 if (error != 0) 2262 return (error); 2263 linux_to_bsd_sigset(&l_ss, &ss); 2264 ssp = &ss; 2265 } 2266 } 2267 2268 /* 2269 * Currently glibc changes nanosecond number to microsecond. 2270 * This mean losing precision but for now it is hardly seen. 2271 */ 2272 if (args->tsp != NULL) { 2273 error = copyin(args->tsp, <s, sizeof(lts)); 2274 if (error != 0) 2275 return (error); 2276 error = linux_to_native_timespec(&uts, <s); 2277 if (error != 0) 2278 return (error); 2279 2280 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2281 if (itimerfix(&utv)) 2282 return (EINVAL); 2283 2284 microtime(&tv0); 2285 tvp = &utv; 2286 } else 2287 tvp = NULL; 2288 2289 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2290 args->exceptfds, tvp, ssp, LINUX_NFDBITS); 2291 2292 if (error == 0 && args->tsp != NULL) { 2293 if (td->td_retval[0] != 0) { 2294 /* 2295 * Compute how much time was left of the timeout, 2296 * by subtracting the current time and the time 2297 * before we started the call, and subtracting 2298 * that result from the user-supplied value. 2299 */ 2300 2301 microtime(&tv1); 2302 timevalsub(&tv1, &tv0); 2303 timevalsub(&utv, &tv1); 2304 if (utv.tv_sec < 0) 2305 timevalclear(&utv); 2306 } else 2307 timevalclear(&utv); 2308 2309 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2310 2311 native_to_linux_timespec(<s, &uts); 2312 error = copyout(<s, args->tsp, sizeof(lts)); 2313 } 2314 2315 return (error); 2316 } 2317 2318 int 2319 linux_ppoll(struct thread *td, struct linux_ppoll_args *args) 2320 { 2321 struct timespec ts0, ts1; 2322 struct l_timespec lts; 2323 struct timespec uts, *tsp; 2324 l_sigset_t l_ss; 2325 sigset_t *ssp; 2326 sigset_t ss; 2327 int error; 2328 2329 if (args->sset != NULL) { 2330 if (args->ssize != sizeof(l_ss)) 2331 return (EINVAL); 2332 error = copyin(args->sset, &l_ss, sizeof(l_ss)); 2333 if (error) 2334 return (error); 2335 linux_to_bsd_sigset(&l_ss, &ss); 2336 ssp = &ss; 2337 } else 2338 ssp = NULL; 2339 if (args->tsp != NULL) { 2340 error = copyin(args->tsp, <s, sizeof(lts)); 2341 if (error) 2342 return (error); 2343 error = linux_to_native_timespec(&uts, <s); 2344 if (error != 0) 2345 return (error); 2346 2347 nanotime(&ts0); 2348 tsp = &uts; 2349 } else 2350 tsp = NULL; 2351 2352 error = kern_poll(td, args->fds, args->nfds, tsp, ssp); 2353 2354 if (error == 0 && args->tsp != NULL) { 2355 if (td->td_retval[0]) { 2356 nanotime(&ts1); 2357 timespecsub(&ts1, &ts0); 2358 timespecsub(&uts, &ts1); 2359 if (uts.tv_sec < 0) 2360 timespecclear(&uts); 2361 } else 2362 timespecclear(&uts); 2363 2364 native_to_linux_timespec(<s, &uts); 2365 error = copyout(<s, args->tsp, sizeof(lts)); 2366 } 2367 2368 return (error); 2369 } 2370 2371 #if defined(DEBUG) || defined(KTR) 2372 /* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2373 2374 #ifdef COMPAT_LINUX32 2375 #define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL 2376 #else 2377 #define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL 2378 #endif 2379 2380 u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))]; 2381 2382 static int 2383 linux_debug(int syscall, int toggle, int global) 2384 { 2385 2386 if (global) { 2387 char c = toggle ? 0 : 0xff; 2388 2389 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2390 return (0); 2391 } 2392 if (syscall < 0 || syscall >= L_MAXSYSCALL) 2393 return (EINVAL); 2394 if (toggle) 2395 clrbit(linux_debug_map, syscall); 2396 else 2397 setbit(linux_debug_map, syscall); 2398 return (0); 2399 } 2400 #undef L_MAXSYSCALL 2401 2402 /* 2403 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2404 * 2405 * E.g.: sysctl linux.debug=21.0 2406 * 2407 * As a special case, syscall "all" will apply to all syscalls globally. 2408 */ 2409 #define LINUX_MAX_DEBUGSTR 16 2410 int 2411 linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2412 { 2413 char value[LINUX_MAX_DEBUGSTR], *p; 2414 int error, sysc, toggle; 2415 int global = 0; 2416 2417 value[0] = '\0'; 2418 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2419 if (error || req->newptr == NULL) 2420 return (error); 2421 for (p = value; *p != '\0' && *p != '.'; p++); 2422 if (*p == '\0') 2423 return (EINVAL); 2424 *p++ = '\0'; 2425 sysc = strtol(value, NULL, 0); 2426 toggle = strtol(p, NULL, 0); 2427 if (strcmp(value, "all") == 0) 2428 global = 1; 2429 error = linux_debug(sysc, toggle, global); 2430 return (error); 2431 } 2432 2433 #endif /* DEBUG || KTR */ 2434 2435 int 2436 linux_sched_rr_get_interval(struct thread *td, 2437 struct linux_sched_rr_get_interval_args *uap) 2438 { 2439 struct timespec ts; 2440 struct l_timespec lts; 2441 struct thread *tdt; 2442 int error; 2443 2444 /* 2445 * According to man in case the invalid pid specified 2446 * EINVAL should be returned. 2447 */ 2448 if (uap->pid < 0) 2449 return (EINVAL); 2450 2451 tdt = linux_tdfind(td, uap->pid, -1); 2452 if (tdt == NULL) 2453 return (ESRCH); 2454 2455 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2456 PROC_UNLOCK(tdt->td_proc); 2457 if (error != 0) 2458 return (error); 2459 native_to_linux_timespec(<s, &ts); 2460 return (copyout(<s, uap->interval, sizeof(lts))); 2461 } 2462 2463 /* 2464 * In case when the Linux thread is the initial thread in 2465 * the thread group thread id is equal to the process id. 2466 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2467 */ 2468 struct thread * 2469 linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2470 { 2471 struct linux_emuldata *em; 2472 struct thread *tdt; 2473 struct proc *p; 2474 2475 tdt = NULL; 2476 if (tid == 0 || tid == td->td_tid) { 2477 tdt = td; 2478 PROC_LOCK(tdt->td_proc); 2479 } else if (tid > PID_MAX) 2480 tdt = tdfind(tid, pid); 2481 else { 2482 /* 2483 * Initial thread where the tid equal to the pid. 2484 */ 2485 p = pfind(tid); 2486 if (p != NULL) { 2487 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2488 /* 2489 * p is not a Linuxulator process. 2490 */ 2491 PROC_UNLOCK(p); 2492 return (NULL); 2493 } 2494 FOREACH_THREAD_IN_PROC(p, tdt) { 2495 em = em_find(tdt); 2496 if (tid == em->em_tid) 2497 return (tdt); 2498 } 2499 PROC_UNLOCK(p); 2500 } 2501 return (NULL); 2502 } 2503 2504 return (tdt); 2505 } 2506 2507 void 2508 linux_to_bsd_waitopts(int options, int *bsdopts) 2509 { 2510 2511 if (options & LINUX_WNOHANG) 2512 *bsdopts |= WNOHANG; 2513 if (options & LINUX_WUNTRACED) 2514 *bsdopts |= WUNTRACED; 2515 if (options & LINUX_WEXITED) 2516 *bsdopts |= WEXITED; 2517 if (options & LINUX_WCONTINUED) 2518 *bsdopts |= WCONTINUED; 2519 if (options & LINUX_WNOWAIT) 2520 *bsdopts |= WNOWAIT; 2521 2522 if (options & __WCLONE) 2523 *bsdopts |= WLINUXCLONE; 2524 } 2525