Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_misc.c
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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/procctl.h> 53 #include <sys/reboot.h> 54 #include <sys/racct.h> 55 #include <sys/random.h> 56 #include <sys/resourcevar.h> 57 #include <sys/sched.h> 58 #include <sys/sdt.h> 59 #include <sys/signalvar.h> 60 #include <sys/stat.h> 61 #include <sys/syscallsubr.h> 62 #include <sys/sysctl.h> 63 #include <sys/sysproto.h> 64 #include <sys/systm.h> 65 #include <sys/time.h> 66 #include <sys/vmmeter.h> 67 #include <sys/vnode.h> 68 #include <sys/wait.h> 69 #include <sys/cpuset.h> 70 #include <sys/uio.h> 71 72 #include <security/mac/mac_framework.h> 73 74 #include <vm/vm.h> 75 #include <vm/pmap.h> 76 #include <vm/vm_kern.h> 77 #include <vm/vm_map.h> 78 #include <vm/vm_extern.h> 79 #include <vm/vm_object.h> 80 #include <vm/swap_pager.h> 81 82 #ifdef COMPAT_LINUX32 83 #include <machine/../linux32/linux.h> 84 #include <machine/../linux32/linux32_proto.h> 85 #else 86 #include <machine/../linux/linux.h> 87 #include <machine/../linux/linux_proto.h> 88 #endif 89 90 #include <compat/linux/linux_dtrace.h> 91 #include <compat/linux/linux_file.h> 92 #include <compat/linux/linux_mib.h> 93 #include <compat/linux/linux_signal.h> 94 #include <compat/linux/linux_timer.h> 95 #include <compat/linux/linux_util.h> 96 #include <compat/linux/linux_sysproto.h> 97 #include <compat/linux/linux_emul.h> 98 #include <compat/linux/linux_misc.h> 99 100 /** 101 * Special DTrace provider for the linuxulator. 102 * 103 * In this file we define the provider for the entire linuxulator. All 104 * modules (= files of the linuxulator) use it. 105 * 106 * We define a different name depending on the emulated bitsize, see 107 * ../../<ARCH>/linux{,32}/linux.h, e.g.: 108 * native bitsize = linuxulator 109 * amd64, 32bit emulation = linuxulator32 110 */ 111 LIN_SDT_PROVIDER_DEFINE(LINUX_DTRACE); 112 113 int stclohz; /* Statistics clock frequency */ 114 115 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 116 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 117 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 118 RLIMIT_MEMLOCK, RLIMIT_AS 119 }; 120 121 struct l_sysinfo { 122 l_long uptime; /* Seconds since boot */ 123 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 124 #define LINUX_SYSINFO_LOADS_SCALE 65536 125 l_ulong totalram; /* Total usable main memory size */ 126 l_ulong freeram; /* Available memory size */ 127 l_ulong sharedram; /* Amount of shared memory */ 128 l_ulong bufferram; /* Memory used by buffers */ 129 l_ulong totalswap; /* Total swap space size */ 130 l_ulong freeswap; /* swap space still available */ 131 l_ushort procs; /* Number of current processes */ 132 l_ushort pads; 133 l_ulong totalbig; 134 l_ulong freebig; 135 l_uint mem_unit; 136 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 137 }; 138 139 struct l_pselect6arg { 140 l_uintptr_t ss; 141 l_size_t ss_len; 142 }; 143 144 static int linux_utimensat_nsec_valid(l_long); 145 146 147 int 148 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 149 { 150 struct l_sysinfo sysinfo; 151 vm_object_t object; 152 int i, j; 153 struct timespec ts; 154 155 bzero(&sysinfo, sizeof(sysinfo)); 156 getnanouptime(&ts); 157 if (ts.tv_nsec != 0) 158 ts.tv_sec++; 159 sysinfo.uptime = ts.tv_sec; 160 161 /* Use the information from the mib to get our load averages */ 162 for (i = 0; i < 3; i++) 163 sysinfo.loads[i] = averunnable.ldavg[i] * 164 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 165 166 sysinfo.totalram = physmem * PAGE_SIZE; 167 sysinfo.freeram = sysinfo.totalram - vm_cnt.v_wire_count * PAGE_SIZE; 168 169 sysinfo.sharedram = 0; 170 mtx_lock(&vm_object_list_mtx); 171 TAILQ_FOREACH(object, &vm_object_list, object_list) 172 if (object->shadow_count > 1) 173 sysinfo.sharedram += object->resident_page_count; 174 mtx_unlock(&vm_object_list_mtx); 175 176 sysinfo.sharedram *= PAGE_SIZE; 177 sysinfo.bufferram = 0; 178 179 swap_pager_status(&i, &j); 180 sysinfo.totalswap = i * PAGE_SIZE; 181 sysinfo.freeswap = (i - j) * PAGE_SIZE; 182 183 sysinfo.procs = nprocs; 184 185 /* The following are only present in newer Linux kernels. */ 186 sysinfo.totalbig = 0; 187 sysinfo.freebig = 0; 188 sysinfo.mem_unit = 1; 189 190 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 191 } 192 193 #ifdef LINUX_LEGACY_SYSCALLS 194 int 195 linux_alarm(struct thread *td, struct linux_alarm_args *args) 196 { 197 struct itimerval it, old_it; 198 u_int secs; 199 int error; 200 201 #ifdef DEBUG 202 if (ldebug(alarm)) 203 printf(ARGS(alarm, "%u"), args->secs); 204 #endif 205 secs = args->secs; 206 /* 207 * Linux alarm() is always successful. Limit secs to INT32_MAX / 2 208 * to match kern_setitimer()'s limit to avoid error from it. 209 * 210 * XXX. Linux limit secs to INT_MAX on 32 and does not limit on 64-bit 211 * platforms. 212 */ 213 if (secs > INT32_MAX / 2) 214 secs = INT32_MAX / 2; 215 216 it.it_value.tv_sec = secs; 217 it.it_value.tv_usec = 0; 218 timevalclear(&it.it_interval); 219 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 220 KASSERT(error == 0, ("kern_setitimer returns %d", error)); 221 222 if ((old_it.it_value.tv_sec == 0 && old_it.it_value.tv_usec > 0) || 223 old_it.it_value.tv_usec >= 500000) 224 old_it.it_value.tv_sec++; 225 td->td_retval[0] = old_it.it_value.tv_sec; 226 return (0); 227 } 228 #endif 229 230 int 231 linux_brk(struct thread *td, struct linux_brk_args *args) 232 { 233 struct vmspace *vm = td->td_proc->p_vmspace; 234 vm_offset_t new, old; 235 struct obreak_args /* { 236 char * nsize; 237 } */ tmp; 238 239 #ifdef DEBUG 240 if (ldebug(brk)) 241 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 242 #endif 243 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 244 new = (vm_offset_t)args->dsend; 245 tmp.nsize = (char *)new; 246 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 247 td->td_retval[0] = (long)new; 248 else 249 td->td_retval[0] = (long)old; 250 251 return (0); 252 } 253 254 #if defined(__i386__) 255 /* XXX: what about amd64/linux32? */ 256 257 int 258 linux_uselib(struct thread *td, struct linux_uselib_args *args) 259 { 260 struct nameidata ni; 261 struct vnode *vp; 262 struct exec *a_out; 263 struct vattr attr; 264 vm_offset_t vmaddr; 265 unsigned long file_offset; 266 unsigned long bss_size; 267 char *library; 268 ssize_t aresid; 269 int error, locked, writecount; 270 271 LCONVPATHEXIST(td, args->library, &library); 272 273 #ifdef DEBUG 274 if (ldebug(uselib)) 275 printf(ARGS(uselib, "%s"), library); 276 #endif 277 278 a_out = NULL; 279 locked = 0; 280 vp = NULL; 281 282 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1, 283 UIO_SYSSPACE, library, td); 284 error = namei(&ni); 285 LFREEPATH(library); 286 if (error) 287 goto cleanup; 288 289 vp = ni.ni_vp; 290 NDFREE(&ni, NDF_ONLY_PNBUF); 291 292 /* 293 * From here on down, we have a locked vnode that must be unlocked. 294 * XXX: The code below largely duplicates exec_check_permissions(). 295 */ 296 locked = 1; 297 298 /* Writable? */ 299 error = VOP_GET_WRITECOUNT(vp, &writecount); 300 if (error != 0) 301 goto cleanup; 302 if (writecount != 0) { 303 error = ETXTBSY; 304 goto cleanup; 305 } 306 307 /* Executable? */ 308 error = VOP_GETATTR(vp, &attr, td->td_ucred); 309 if (error) 310 goto cleanup; 311 312 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 313 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 314 /* EACCESS is what exec(2) returns. */ 315 error = ENOEXEC; 316 goto cleanup; 317 } 318 319 /* Sensible size? */ 320 if (attr.va_size == 0) { 321 error = ENOEXEC; 322 goto cleanup; 323 } 324 325 /* Can we access it? */ 326 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 327 if (error) 328 goto cleanup; 329 330 /* 331 * XXX: This should use vn_open() so that it is properly authorized, 332 * and to reduce code redundancy all over the place here. 333 * XXX: Not really, it duplicates far more of exec_check_permissions() 334 * than vn_open(). 335 */ 336 #ifdef MAC 337 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 338 if (error) 339 goto cleanup; 340 #endif 341 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 342 if (error) 343 goto cleanup; 344 345 /* Pull in executable header into exec_map */ 346 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 347 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 348 if (error) 349 goto cleanup; 350 351 /* Is it a Linux binary ? */ 352 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 353 error = ENOEXEC; 354 goto cleanup; 355 } 356 357 /* 358 * While we are here, we should REALLY do some more checks 359 */ 360 361 /* Set file/virtual offset based on a.out variant. */ 362 switch ((int)(a_out->a_magic & 0xffff)) { 363 case 0413: /* ZMAGIC */ 364 file_offset = 1024; 365 break; 366 case 0314: /* QMAGIC */ 367 file_offset = 0; 368 break; 369 default: 370 error = ENOEXEC; 371 goto cleanup; 372 } 373 374 bss_size = round_page(a_out->a_bss); 375 376 /* Check various fields in header for validity/bounds. */ 377 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 378 error = ENOEXEC; 379 goto cleanup; 380 } 381 382 /* text + data can't exceed file size */ 383 if (a_out->a_data + a_out->a_text > attr.va_size) { 384 error = EFAULT; 385 goto cleanup; 386 } 387 388 /* 389 * text/data/bss must not exceed limits 390 * XXX - this is not complete. it should check current usage PLUS 391 * the resources needed by this library. 392 */ 393 PROC_LOCK(td->td_proc); 394 if (a_out->a_text > maxtsiz || 395 a_out->a_data + bss_size > lim_cur_proc(td->td_proc, RLIMIT_DATA) || 396 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 397 bss_size) != 0) { 398 PROC_UNLOCK(td->td_proc); 399 error = ENOMEM; 400 goto cleanup; 401 } 402 PROC_UNLOCK(td->td_proc); 403 404 /* 405 * Prevent more writers. 406 * XXX: Note that if any of the VM operations fail below we don't 407 * clear this flag. 408 */ 409 VOP_SET_TEXT(vp); 410 411 /* 412 * Lock no longer needed 413 */ 414 locked = 0; 415 VOP_UNLOCK(vp, 0); 416 417 /* 418 * Check if file_offset page aligned. Currently we cannot handle 419 * misalinged file offsets, and so we read in the entire image 420 * (what a waste). 421 */ 422 if (file_offset & PAGE_MASK) { 423 #ifdef DEBUG 424 printf("uselib: Non page aligned binary %lu\n", file_offset); 425 #endif 426 /* Map text+data read/write/execute */ 427 428 /* a_entry is the load address and is page aligned */ 429 vmaddr = trunc_page(a_out->a_entry); 430 431 /* get anon user mapping, read+write+execute */ 432 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 433 &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE, 434 VM_PROT_ALL, VM_PROT_ALL, 0); 435 if (error) 436 goto cleanup; 437 438 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 439 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 440 td->td_ucred, NOCRED, &aresid, td); 441 if (error != 0) 442 goto cleanup; 443 if (aresid != 0) { 444 error = ENOEXEC; 445 goto cleanup; 446 } 447 } else { 448 #ifdef DEBUG 449 printf("uselib: Page aligned binary %lu\n", file_offset); 450 #endif 451 /* 452 * for QMAGIC, a_entry is 20 bytes beyond the load address 453 * to skip the executable header 454 */ 455 vmaddr = trunc_page(a_out->a_entry); 456 457 /* 458 * Map it all into the process's space as a single 459 * copy-on-write "data" segment. 460 */ 461 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 462 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 463 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 464 if (error) 465 goto cleanup; 466 } 467 #ifdef DEBUG 468 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 469 ((long *)vmaddr)[1]); 470 #endif 471 if (bss_size != 0) { 472 /* Calculate BSS start address */ 473 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 474 a_out->a_data; 475 476 /* allocate some 'anon' space */ 477 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 478 &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, 479 VM_PROT_ALL, 0); 480 if (error) 481 goto cleanup; 482 } 483 484 cleanup: 485 /* Unlock vnode if needed */ 486 if (locked) 487 VOP_UNLOCK(vp, 0); 488 489 /* Release the temporary mapping. */ 490 if (a_out) 491 kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 492 493 return (error); 494 } 495 496 #endif /* __i386__ */ 497 498 #ifdef LINUX_LEGACY_SYSCALLS 499 int 500 linux_select(struct thread *td, struct linux_select_args *args) 501 { 502 l_timeval ltv; 503 struct timeval tv0, tv1, utv, *tvp; 504 int error; 505 506 #ifdef DEBUG 507 if (ldebug(select)) 508 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 509 (void *)args->readfds, (void *)args->writefds, 510 (void *)args->exceptfds, (void *)args->timeout); 511 #endif 512 513 /* 514 * Store current time for computation of the amount of 515 * time left. 516 */ 517 if (args->timeout) { 518 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 519 goto select_out; 520 utv.tv_sec = ltv.tv_sec; 521 utv.tv_usec = ltv.tv_usec; 522 #ifdef DEBUG 523 if (ldebug(select)) 524 printf(LMSG("incoming timeout (%jd/%ld)"), 525 (intmax_t)utv.tv_sec, utv.tv_usec); 526 #endif 527 528 if (itimerfix(&utv)) { 529 /* 530 * The timeval was invalid. Convert it to something 531 * valid that will act as it does under Linux. 532 */ 533 utv.tv_sec += utv.tv_usec / 1000000; 534 utv.tv_usec %= 1000000; 535 if (utv.tv_usec < 0) { 536 utv.tv_sec -= 1; 537 utv.tv_usec += 1000000; 538 } 539 if (utv.tv_sec < 0) 540 timevalclear(&utv); 541 } 542 microtime(&tv0); 543 tvp = &utv; 544 } else 545 tvp = NULL; 546 547 error = kern_select(td, args->nfds, args->readfds, args->writefds, 548 args->exceptfds, tvp, LINUX_NFDBITS); 549 550 #ifdef DEBUG 551 if (ldebug(select)) 552 printf(LMSG("real select returns %d"), error); 553 #endif 554 if (error) 555 goto select_out; 556 557 if (args->timeout) { 558 if (td->td_retval[0]) { 559 /* 560 * Compute how much time was left of the timeout, 561 * by subtracting the current time and the time 562 * before we started the call, and subtracting 563 * that result from the user-supplied value. 564 */ 565 microtime(&tv1); 566 timevalsub(&tv1, &tv0); 567 timevalsub(&utv, &tv1); 568 if (utv.tv_sec < 0) 569 timevalclear(&utv); 570 } else 571 timevalclear(&utv); 572 #ifdef DEBUG 573 if (ldebug(select)) 574 printf(LMSG("outgoing timeout (%jd/%ld)"), 575 (intmax_t)utv.tv_sec, utv.tv_usec); 576 #endif 577 ltv.tv_sec = utv.tv_sec; 578 ltv.tv_usec = utv.tv_usec; 579 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 580 goto select_out; 581 } 582 583 select_out: 584 #ifdef DEBUG 585 if (ldebug(select)) 586 printf(LMSG("select_out -> %d"), error); 587 #endif 588 return (error); 589 } 590 #endif 591 592 int 593 linux_mremap(struct thread *td, struct linux_mremap_args *args) 594 { 595 uintptr_t addr; 596 size_t len; 597 int error = 0; 598 599 #ifdef DEBUG 600 if (ldebug(mremap)) 601 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 602 (void *)(uintptr_t)args->addr, 603 (unsigned long)args->old_len, 604 (unsigned long)args->new_len, 605 (unsigned long)args->flags); 606 #endif 607 608 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 609 td->td_retval[0] = 0; 610 return (EINVAL); 611 } 612 613 /* 614 * Check for the page alignment. 615 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 616 */ 617 if (args->addr & PAGE_MASK) { 618 td->td_retval[0] = 0; 619 return (EINVAL); 620 } 621 622 args->new_len = round_page(args->new_len); 623 args->old_len = round_page(args->old_len); 624 625 if (args->new_len > args->old_len) { 626 td->td_retval[0] = 0; 627 return (ENOMEM); 628 } 629 630 if (args->new_len < args->old_len) { 631 addr = args->addr + args->new_len; 632 len = args->old_len - args->new_len; 633 error = kern_munmap(td, addr, len); 634 } 635 636 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 637 return (error); 638 } 639 640 #define LINUX_MS_ASYNC 0x0001 641 #define LINUX_MS_INVALIDATE 0x0002 642 #define LINUX_MS_SYNC 0x0004 643 644 int 645 linux_msync(struct thread *td, struct linux_msync_args *args) 646 { 647 648 return (kern_msync(td, args->addr, args->len, 649 args->fl & ~LINUX_MS_SYNC)); 650 } 651 652 #ifdef LINUX_LEGACY_SYSCALLS 653 int 654 linux_time(struct thread *td, struct linux_time_args *args) 655 { 656 struct timeval tv; 657 l_time_t tm; 658 int error; 659 660 #ifdef DEBUG 661 if (ldebug(time)) 662 printf(ARGS(time, "*")); 663 #endif 664 665 microtime(&tv); 666 tm = tv.tv_sec; 667 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 668 return (error); 669 td->td_retval[0] = tm; 670 return (0); 671 } 672 #endif 673 674 struct l_times_argv { 675 l_clock_t tms_utime; 676 l_clock_t tms_stime; 677 l_clock_t tms_cutime; 678 l_clock_t tms_cstime; 679 }; 680 681 682 /* 683 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 684 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 685 * auxiliary vector entry. 686 */ 687 #define CLK_TCK 100 688 689 #define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 690 #define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 691 692 #define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 693 CONVNTCK(r) : CONVOTCK(r)) 694 695 int 696 linux_times(struct thread *td, struct linux_times_args *args) 697 { 698 struct timeval tv, utime, stime, cutime, cstime; 699 struct l_times_argv tms; 700 struct proc *p; 701 int error; 702 703 #ifdef DEBUG 704 if (ldebug(times)) 705 printf(ARGS(times, "*")); 706 #endif 707 708 if (args->buf != NULL) { 709 p = td->td_proc; 710 PROC_LOCK(p); 711 PROC_STATLOCK(p); 712 calcru(p, &utime, &stime); 713 PROC_STATUNLOCK(p); 714 calccru(p, &cutime, &cstime); 715 PROC_UNLOCK(p); 716 717 tms.tms_utime = CONVTCK(utime); 718 tms.tms_stime = CONVTCK(stime); 719 720 tms.tms_cutime = CONVTCK(cutime); 721 tms.tms_cstime = CONVTCK(cstime); 722 723 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 724 return (error); 725 } 726 727 microuptime(&tv); 728 td->td_retval[0] = (int)CONVTCK(tv); 729 return (0); 730 } 731 732 int 733 linux_newuname(struct thread *td, struct linux_newuname_args *args) 734 { 735 struct l_new_utsname utsname; 736 char osname[LINUX_MAX_UTSNAME]; 737 char osrelease[LINUX_MAX_UTSNAME]; 738 char *p; 739 740 #ifdef DEBUG 741 if (ldebug(newuname)) 742 printf(ARGS(newuname, "*")); 743 #endif 744 745 linux_get_osname(td, osname); 746 linux_get_osrelease(td, osrelease); 747 748 bzero(&utsname, sizeof(utsname)); 749 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 750 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 751 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 752 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 753 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 754 for (p = utsname.version; *p != '\0'; ++p) 755 if (*p == '\n') { 756 *p = '\0'; 757 break; 758 } 759 strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME); 760 761 return (copyout(&utsname, args->buf, sizeof(utsname))); 762 } 763 764 struct l_utimbuf { 765 l_time_t l_actime; 766 l_time_t l_modtime; 767 }; 768 769 #ifdef LINUX_LEGACY_SYSCALLS 770 int 771 linux_utime(struct thread *td, struct linux_utime_args *args) 772 { 773 struct timeval tv[2], *tvp; 774 struct l_utimbuf lut; 775 char *fname; 776 int error; 777 778 LCONVPATHEXIST(td, args->fname, &fname); 779 780 #ifdef DEBUG 781 if (ldebug(utime)) 782 printf(ARGS(utime, "%s, *"), fname); 783 #endif 784 785 if (args->times) { 786 if ((error = copyin(args->times, &lut, sizeof lut))) { 787 LFREEPATH(fname); 788 return (error); 789 } 790 tv[0].tv_sec = lut.l_actime; 791 tv[0].tv_usec = 0; 792 tv[1].tv_sec = lut.l_modtime; 793 tv[1].tv_usec = 0; 794 tvp = tv; 795 } else 796 tvp = NULL; 797 798 error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, tvp, 799 UIO_SYSSPACE); 800 LFREEPATH(fname); 801 return (error); 802 } 803 #endif 804 805 #ifdef LINUX_LEGACY_SYSCALLS 806 int 807 linux_utimes(struct thread *td, struct linux_utimes_args *args) 808 { 809 l_timeval ltv[2]; 810 struct timeval tv[2], *tvp = NULL; 811 char *fname; 812 int error; 813 814 LCONVPATHEXIST(td, args->fname, &fname); 815 816 #ifdef DEBUG 817 if (ldebug(utimes)) 818 printf(ARGS(utimes, "%s, *"), fname); 819 #endif 820 821 if (args->tptr != NULL) { 822 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 823 LFREEPATH(fname); 824 return (error); 825 } 826 tv[0].tv_sec = ltv[0].tv_sec; 827 tv[0].tv_usec = ltv[0].tv_usec; 828 tv[1].tv_sec = ltv[1].tv_sec; 829 tv[1].tv_usec = ltv[1].tv_usec; 830 tvp = tv; 831 } 832 833 error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, 834 tvp, UIO_SYSSPACE); 835 LFREEPATH(fname); 836 return (error); 837 } 838 #endif 839 840 static int 841 linux_utimensat_nsec_valid(l_long nsec) 842 { 843 844 if (nsec == LINUX_UTIME_OMIT || nsec == LINUX_UTIME_NOW) 845 return (0); 846 if (nsec >= 0 && nsec <= 999999999) 847 return (0); 848 return (1); 849 } 850 851 int 852 linux_utimensat(struct thread *td, struct linux_utimensat_args *args) 853 { 854 struct l_timespec l_times[2]; 855 struct timespec times[2], *timesp = NULL; 856 char *path = NULL; 857 int error, dfd, flags = 0; 858 859 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 860 861 #ifdef DEBUG 862 if (ldebug(utimensat)) 863 printf(ARGS(utimensat, "%d, *"), dfd); 864 #endif 865 866 if (args->flags & ~LINUX_AT_SYMLINK_NOFOLLOW) 867 return (EINVAL); 868 869 if (args->times != NULL) { 870 error = copyin(args->times, l_times, sizeof(l_times)); 871 if (error != 0) 872 return (error); 873 874 if (linux_utimensat_nsec_valid(l_times[0].tv_nsec) != 0 || 875 linux_utimensat_nsec_valid(l_times[1].tv_nsec) != 0) 876 return (EINVAL); 877 878 times[0].tv_sec = l_times[0].tv_sec; 879 switch (l_times[0].tv_nsec) 880 { 881 case LINUX_UTIME_OMIT: 882 times[0].tv_nsec = UTIME_OMIT; 883 break; 884 case LINUX_UTIME_NOW: 885 times[0].tv_nsec = UTIME_NOW; 886 break; 887 default: 888 times[0].tv_nsec = l_times[0].tv_nsec; 889 } 890 891 times[1].tv_sec = l_times[1].tv_sec; 892 switch (l_times[1].tv_nsec) 893 { 894 case LINUX_UTIME_OMIT: 895 times[1].tv_nsec = UTIME_OMIT; 896 break; 897 case LINUX_UTIME_NOW: 898 times[1].tv_nsec = UTIME_NOW; 899 break; 900 default: 901 times[1].tv_nsec = l_times[1].tv_nsec; 902 break; 903 } 904 timesp = times; 905 906 /* This breaks POSIX, but is what the Linux kernel does 907 * _on purpose_ (documented in the man page for utimensat(2)), 908 * so we must follow that behaviour. */ 909 if (times[0].tv_nsec == UTIME_OMIT && 910 times[1].tv_nsec == UTIME_OMIT) 911 return (0); 912 } 913 914 if (args->pathname != NULL) 915 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 916 else if (args->flags != 0) 917 return (EINVAL); 918 919 if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) 920 flags |= AT_SYMLINK_NOFOLLOW; 921 922 if (path == NULL) 923 error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE); 924 else { 925 error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp, 926 UIO_SYSSPACE, flags); 927 LFREEPATH(path); 928 } 929 930 return (error); 931 } 932 933 #ifdef LINUX_LEGACY_SYSCALLS 934 int 935 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 936 { 937 l_timeval ltv[2]; 938 struct timeval tv[2], *tvp = NULL; 939 char *fname; 940 int error, dfd; 941 942 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 943 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 944 945 #ifdef DEBUG 946 if (ldebug(futimesat)) 947 printf(ARGS(futimesat, "%s, *"), fname); 948 #endif 949 950 if (args->utimes != NULL) { 951 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 952 LFREEPATH(fname); 953 return (error); 954 } 955 tv[0].tv_sec = ltv[0].tv_sec; 956 tv[0].tv_usec = ltv[0].tv_usec; 957 tv[1].tv_sec = ltv[1].tv_sec; 958 tv[1].tv_usec = ltv[1].tv_usec; 959 tvp = tv; 960 } 961 962 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 963 LFREEPATH(fname); 964 return (error); 965 } 966 #endif 967 968 int 969 linux_common_wait(struct thread *td, int pid, int *status, 970 int options, struct rusage *ru) 971 { 972 int error, tmpstat; 973 974 error = kern_wait(td, pid, &tmpstat, options, ru); 975 if (error) 976 return (error); 977 978 if (status) { 979 tmpstat &= 0xffff; 980 if (WIFSIGNALED(tmpstat)) 981 tmpstat = (tmpstat & 0xffffff80) | 982 bsd_to_linux_signal(WTERMSIG(tmpstat)); 983 else if (WIFSTOPPED(tmpstat)) 984 tmpstat = (tmpstat & 0xffff00ff) | 985 (bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8); 986 else if (WIFCONTINUED(tmpstat)) 987 tmpstat = 0xffff; 988 error = copyout(&tmpstat, status, sizeof(int)); 989 } 990 991 return (error); 992 } 993 994 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 995 int 996 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 997 { 998 struct linux_wait4_args wait4_args; 999 1000 #ifdef DEBUG 1001 if (ldebug(waitpid)) 1002 printf(ARGS(waitpid, "%d, %p, %d"), 1003 args->pid, (void *)args->status, args->options); 1004 #endif 1005 1006 wait4_args.pid = args->pid; 1007 wait4_args.status = args->status; 1008 wait4_args.options = args->options; 1009 wait4_args.rusage = NULL; 1010 1011 return (linux_wait4(td, &wait4_args)); 1012 } 1013 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1014 1015 int 1016 linux_wait4(struct thread *td, struct linux_wait4_args *args) 1017 { 1018 int error, options; 1019 struct rusage ru, *rup; 1020 1021 #ifdef DEBUG 1022 if (ldebug(wait4)) 1023 printf(ARGS(wait4, "%d, %p, %d, %p"), 1024 args->pid, (void *)args->status, args->options, 1025 (void *)args->rusage); 1026 #endif 1027 if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG | 1028 LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL)) 1029 return (EINVAL); 1030 1031 options = WEXITED; 1032 linux_to_bsd_waitopts(args->options, &options); 1033 1034 if (args->rusage != NULL) 1035 rup = &ru; 1036 else 1037 rup = NULL; 1038 error = linux_common_wait(td, args->pid, args->status, options, rup); 1039 if (error != 0) 1040 return (error); 1041 if (args->rusage != NULL) 1042 error = linux_copyout_rusage(&ru, args->rusage); 1043 return (error); 1044 } 1045 1046 int 1047 linux_waitid(struct thread *td, struct linux_waitid_args *args) 1048 { 1049 int status, options, sig; 1050 struct __wrusage wru; 1051 siginfo_t siginfo; 1052 l_siginfo_t lsi; 1053 idtype_t idtype; 1054 struct proc *p; 1055 int error; 1056 1057 options = 0; 1058 linux_to_bsd_waitopts(args->options, &options); 1059 1060 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 1061 return (EINVAL); 1062 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 1063 return (EINVAL); 1064 1065 switch (args->idtype) { 1066 case LINUX_P_ALL: 1067 idtype = P_ALL; 1068 break; 1069 case LINUX_P_PID: 1070 if (args->id <= 0) 1071 return (EINVAL); 1072 idtype = P_PID; 1073 break; 1074 case LINUX_P_PGID: 1075 if (args->id <= 0) 1076 return (EINVAL); 1077 idtype = P_PGID; 1078 break; 1079 default: 1080 return (EINVAL); 1081 } 1082 1083 error = kern_wait6(td, idtype, args->id, &status, options, 1084 &wru, &siginfo); 1085 if (error != 0) 1086 return (error); 1087 if (args->rusage != NULL) { 1088 error = linux_copyout_rusage(&wru.wru_children, 1089 args->rusage); 1090 if (error != 0) 1091 return (error); 1092 } 1093 if (args->info != NULL) { 1094 p = td->td_proc; 1095 bzero(&lsi, sizeof(lsi)); 1096 if (td->td_retval[0] != 0) { 1097 sig = bsd_to_linux_signal(siginfo.si_signo); 1098 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 1099 } 1100 error = copyout(&lsi, args->info, sizeof(lsi)); 1101 } 1102 td->td_retval[0] = 0; 1103 1104 return (error); 1105 } 1106 1107 #ifdef LINUX_LEGACY_SYSCALLS 1108 int 1109 linux_mknod(struct thread *td, struct linux_mknod_args *args) 1110 { 1111 char *path; 1112 int error; 1113 1114 LCONVPATHCREAT(td, args->path, &path); 1115 1116 #ifdef DEBUG 1117 if (ldebug(mknod)) 1118 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1119 (uintmax_t)args->dev); 1120 #endif 1121 1122 switch (args->mode & S_IFMT) { 1123 case S_IFIFO: 1124 case S_IFSOCK: 1125 error = kern_mkfifoat(td, AT_FDCWD, path, UIO_SYSSPACE, 1126 args->mode); 1127 break; 1128 1129 case S_IFCHR: 1130 case S_IFBLK: 1131 error = kern_mknodat(td, AT_FDCWD, path, UIO_SYSSPACE, 1132 args->mode, args->dev); 1133 break; 1134 1135 case S_IFDIR: 1136 error = EPERM; 1137 break; 1138 1139 case 0: 1140 args->mode |= S_IFREG; 1141 /* FALLTHROUGH */ 1142 case S_IFREG: 1143 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, 1144 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1145 if (error == 0) 1146 kern_close(td, td->td_retval[0]); 1147 break; 1148 1149 default: 1150 error = EINVAL; 1151 break; 1152 } 1153 LFREEPATH(path); 1154 return (error); 1155 } 1156 #endif 1157 1158 int 1159 linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1160 { 1161 char *path; 1162 int error, dfd; 1163 1164 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1165 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1166 1167 #ifdef DEBUG 1168 if (ldebug(mknodat)) 1169 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1170 #endif 1171 1172 switch (args->mode & S_IFMT) { 1173 case S_IFIFO: 1174 case S_IFSOCK: 1175 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1176 break; 1177 1178 case S_IFCHR: 1179 case S_IFBLK: 1180 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1181 args->dev); 1182 break; 1183 1184 case S_IFDIR: 1185 error = EPERM; 1186 break; 1187 1188 case 0: 1189 args->mode |= S_IFREG; 1190 /* FALLTHROUGH */ 1191 case S_IFREG: 1192 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1193 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1194 if (error == 0) 1195 kern_close(td, td->td_retval[0]); 1196 break; 1197 1198 default: 1199 error = EINVAL; 1200 break; 1201 } 1202 LFREEPATH(path); 1203 return (error); 1204 } 1205 1206 /* 1207 * UGH! This is just about the dumbest idea I've ever heard!! 1208 */ 1209 int 1210 linux_personality(struct thread *td, struct linux_personality_args *args) 1211 { 1212 struct linux_pemuldata *pem; 1213 struct proc *p = td->td_proc; 1214 uint32_t old; 1215 1216 #ifdef DEBUG 1217 if (ldebug(personality)) 1218 printf(ARGS(personality, "%u"), args->per); 1219 #endif 1220 1221 PROC_LOCK(p); 1222 pem = pem_find(p); 1223 old = pem->persona; 1224 if (args->per != 0xffffffff) 1225 pem->persona = args->per; 1226 PROC_UNLOCK(p); 1227 1228 td->td_retval[0] = old; 1229 return (0); 1230 } 1231 1232 struct l_itimerval { 1233 l_timeval it_interval; 1234 l_timeval it_value; 1235 }; 1236 1237 #define B2L_ITIMERVAL(bip, lip) \ 1238 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1239 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1240 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1241 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1242 1243 int 1244 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1245 { 1246 int error; 1247 struct l_itimerval ls; 1248 struct itimerval aitv, oitv; 1249 1250 #ifdef DEBUG 1251 if (ldebug(setitimer)) 1252 printf(ARGS(setitimer, "%p, %p"), 1253 (void *)uap->itv, (void *)uap->oitv); 1254 #endif 1255 1256 if (uap->itv == NULL) { 1257 uap->itv = uap->oitv; 1258 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1259 } 1260 1261 error = copyin(uap->itv, &ls, sizeof(ls)); 1262 if (error != 0) 1263 return (error); 1264 B2L_ITIMERVAL(&aitv, &ls); 1265 #ifdef DEBUG 1266 if (ldebug(setitimer)) { 1267 printf("setitimer: value: sec: %jd, usec: %ld\n", 1268 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1269 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1270 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1271 } 1272 #endif 1273 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1274 if (error != 0 || uap->oitv == NULL) 1275 return (error); 1276 B2L_ITIMERVAL(&ls, &oitv); 1277 1278 return (copyout(&ls, uap->oitv, sizeof(ls))); 1279 } 1280 1281 int 1282 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1283 { 1284 int error; 1285 struct l_itimerval ls; 1286 struct itimerval aitv; 1287 1288 #ifdef DEBUG 1289 if (ldebug(getitimer)) 1290 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1291 #endif 1292 error = kern_getitimer(td, uap->which, &aitv); 1293 if (error != 0) 1294 return (error); 1295 B2L_ITIMERVAL(&ls, &aitv); 1296 return (copyout(&ls, uap->itv, sizeof(ls))); 1297 } 1298 1299 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1300 int 1301 linux_nice(struct thread *td, struct linux_nice_args *args) 1302 { 1303 struct setpriority_args bsd_args; 1304 1305 bsd_args.which = PRIO_PROCESS; 1306 bsd_args.who = 0; /* current process */ 1307 bsd_args.prio = args->inc; 1308 return (sys_setpriority(td, &bsd_args)); 1309 } 1310 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1311 1312 int 1313 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1314 { 1315 struct ucred *newcred, *oldcred; 1316 l_gid_t *linux_gidset; 1317 gid_t *bsd_gidset; 1318 int ngrp, error; 1319 struct proc *p; 1320 1321 ngrp = args->gidsetsize; 1322 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1323 return (EINVAL); 1324 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1325 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1326 if (error) 1327 goto out; 1328 newcred = crget(); 1329 crextend(newcred, ngrp + 1); 1330 p = td->td_proc; 1331 PROC_LOCK(p); 1332 oldcred = p->p_ucred; 1333 crcopy(newcred, oldcred); 1334 1335 /* 1336 * cr_groups[0] holds egid. Setting the whole set from 1337 * the supplied set will cause egid to be changed too. 1338 * Keep cr_groups[0] unchanged to prevent that. 1339 */ 1340 1341 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1342 PROC_UNLOCK(p); 1343 crfree(newcred); 1344 goto out; 1345 } 1346 1347 if (ngrp > 0) { 1348 newcred->cr_ngroups = ngrp + 1; 1349 1350 bsd_gidset = newcred->cr_groups; 1351 ngrp--; 1352 while (ngrp >= 0) { 1353 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1354 ngrp--; 1355 } 1356 } else 1357 newcred->cr_ngroups = 1; 1358 1359 setsugid(p); 1360 proc_set_cred(p, newcred); 1361 PROC_UNLOCK(p); 1362 crfree(oldcred); 1363 error = 0; 1364 out: 1365 free(linux_gidset, M_LINUX); 1366 return (error); 1367 } 1368 1369 int 1370 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1371 { 1372 struct ucred *cred; 1373 l_gid_t *linux_gidset; 1374 gid_t *bsd_gidset; 1375 int bsd_gidsetsz, ngrp, error; 1376 1377 cred = td->td_ucred; 1378 bsd_gidset = cred->cr_groups; 1379 bsd_gidsetsz = cred->cr_ngroups - 1; 1380 1381 /* 1382 * cr_groups[0] holds egid. Returning the whole set 1383 * here will cause a duplicate. Exclude cr_groups[0] 1384 * to prevent that. 1385 */ 1386 1387 if ((ngrp = args->gidsetsize) == 0) { 1388 td->td_retval[0] = bsd_gidsetsz; 1389 return (0); 1390 } 1391 1392 if (ngrp < bsd_gidsetsz) 1393 return (EINVAL); 1394 1395 ngrp = 0; 1396 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1397 M_LINUX, M_WAITOK); 1398 while (ngrp < bsd_gidsetsz) { 1399 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1400 ngrp++; 1401 } 1402 1403 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1404 free(linux_gidset, M_LINUX); 1405 if (error) 1406 return (error); 1407 1408 td->td_retval[0] = ngrp; 1409 return (0); 1410 } 1411 1412 int 1413 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1414 { 1415 struct rlimit bsd_rlim; 1416 struct l_rlimit rlim; 1417 u_int which; 1418 int error; 1419 1420 #ifdef DEBUG 1421 if (ldebug(setrlimit)) 1422 printf(ARGS(setrlimit, "%d, %p"), 1423 args->resource, (void *)args->rlim); 1424 #endif 1425 1426 if (args->resource >= LINUX_RLIM_NLIMITS) 1427 return (EINVAL); 1428 1429 which = linux_to_bsd_resource[args->resource]; 1430 if (which == -1) 1431 return (EINVAL); 1432 1433 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1434 if (error) 1435 return (error); 1436 1437 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1438 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1439 return (kern_setrlimit(td, which, &bsd_rlim)); 1440 } 1441 1442 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1443 int 1444 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1445 { 1446 struct l_rlimit rlim; 1447 struct rlimit bsd_rlim; 1448 u_int which; 1449 1450 #ifdef DEBUG 1451 if (ldebug(old_getrlimit)) 1452 printf(ARGS(old_getrlimit, "%d, %p"), 1453 args->resource, (void *)args->rlim); 1454 #endif 1455 1456 if (args->resource >= LINUX_RLIM_NLIMITS) 1457 return (EINVAL); 1458 1459 which = linux_to_bsd_resource[args->resource]; 1460 if (which == -1) 1461 return (EINVAL); 1462 1463 lim_rlimit(td, which, &bsd_rlim); 1464 1465 #ifdef COMPAT_LINUX32 1466 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1467 if (rlim.rlim_cur == UINT_MAX) 1468 rlim.rlim_cur = INT_MAX; 1469 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1470 if (rlim.rlim_max == UINT_MAX) 1471 rlim.rlim_max = INT_MAX; 1472 #else 1473 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1474 if (rlim.rlim_cur == ULONG_MAX) 1475 rlim.rlim_cur = LONG_MAX; 1476 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1477 if (rlim.rlim_max == ULONG_MAX) 1478 rlim.rlim_max = LONG_MAX; 1479 #endif 1480 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1481 } 1482 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1483 1484 int 1485 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1486 { 1487 struct l_rlimit rlim; 1488 struct rlimit bsd_rlim; 1489 u_int which; 1490 1491 #ifdef DEBUG 1492 if (ldebug(getrlimit)) 1493 printf(ARGS(getrlimit, "%d, %p"), 1494 args->resource, (void *)args->rlim); 1495 #endif 1496 1497 if (args->resource >= LINUX_RLIM_NLIMITS) 1498 return (EINVAL); 1499 1500 which = linux_to_bsd_resource[args->resource]; 1501 if (which == -1) 1502 return (EINVAL); 1503 1504 lim_rlimit(td, which, &bsd_rlim); 1505 1506 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1507 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1508 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1509 } 1510 1511 int 1512 linux_sched_setscheduler(struct thread *td, 1513 struct linux_sched_setscheduler_args *args) 1514 { 1515 struct sched_param sched_param; 1516 struct thread *tdt; 1517 int error, policy; 1518 1519 #ifdef DEBUG 1520 if (ldebug(sched_setscheduler)) 1521 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1522 args->pid, args->policy, (const void *)args->param); 1523 #endif 1524 1525 switch (args->policy) { 1526 case LINUX_SCHED_OTHER: 1527 policy = SCHED_OTHER; 1528 break; 1529 case LINUX_SCHED_FIFO: 1530 policy = SCHED_FIFO; 1531 break; 1532 case LINUX_SCHED_RR: 1533 policy = SCHED_RR; 1534 break; 1535 default: 1536 return (EINVAL); 1537 } 1538 1539 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1540 if (error) 1541 return (error); 1542 1543 tdt = linux_tdfind(td, args->pid, -1); 1544 if (tdt == NULL) 1545 return (ESRCH); 1546 1547 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1548 PROC_UNLOCK(tdt->td_proc); 1549 return (error); 1550 } 1551 1552 int 1553 linux_sched_getscheduler(struct thread *td, 1554 struct linux_sched_getscheduler_args *args) 1555 { 1556 struct thread *tdt; 1557 int error, policy; 1558 1559 #ifdef DEBUG 1560 if (ldebug(sched_getscheduler)) 1561 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1562 #endif 1563 1564 tdt = linux_tdfind(td, args->pid, -1); 1565 if (tdt == NULL) 1566 return (ESRCH); 1567 1568 error = kern_sched_getscheduler(td, tdt, &policy); 1569 PROC_UNLOCK(tdt->td_proc); 1570 1571 switch (policy) { 1572 case SCHED_OTHER: 1573 td->td_retval[0] = LINUX_SCHED_OTHER; 1574 break; 1575 case SCHED_FIFO: 1576 td->td_retval[0] = LINUX_SCHED_FIFO; 1577 break; 1578 case SCHED_RR: 1579 td->td_retval[0] = LINUX_SCHED_RR; 1580 break; 1581 } 1582 return (error); 1583 } 1584 1585 int 1586 linux_sched_get_priority_max(struct thread *td, 1587 struct linux_sched_get_priority_max_args *args) 1588 { 1589 struct sched_get_priority_max_args bsd; 1590 1591 #ifdef DEBUG 1592 if (ldebug(sched_get_priority_max)) 1593 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1594 #endif 1595 1596 switch (args->policy) { 1597 case LINUX_SCHED_OTHER: 1598 bsd.policy = SCHED_OTHER; 1599 break; 1600 case LINUX_SCHED_FIFO: 1601 bsd.policy = SCHED_FIFO; 1602 break; 1603 case LINUX_SCHED_RR: 1604 bsd.policy = SCHED_RR; 1605 break; 1606 default: 1607 return (EINVAL); 1608 } 1609 return (sys_sched_get_priority_max(td, &bsd)); 1610 } 1611 1612 int 1613 linux_sched_get_priority_min(struct thread *td, 1614 struct linux_sched_get_priority_min_args *args) 1615 { 1616 struct sched_get_priority_min_args bsd; 1617 1618 #ifdef DEBUG 1619 if (ldebug(sched_get_priority_min)) 1620 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1621 #endif 1622 1623 switch (args->policy) { 1624 case LINUX_SCHED_OTHER: 1625 bsd.policy = SCHED_OTHER; 1626 break; 1627 case LINUX_SCHED_FIFO: 1628 bsd.policy = SCHED_FIFO; 1629 break; 1630 case LINUX_SCHED_RR: 1631 bsd.policy = SCHED_RR; 1632 break; 1633 default: 1634 return (EINVAL); 1635 } 1636 return (sys_sched_get_priority_min(td, &bsd)); 1637 } 1638 1639 #define REBOOT_CAD_ON 0x89abcdef 1640 #define REBOOT_CAD_OFF 0 1641 #define REBOOT_HALT 0xcdef0123 1642 #define REBOOT_RESTART 0x01234567 1643 #define REBOOT_RESTART2 0xA1B2C3D4 1644 #define REBOOT_POWEROFF 0x4321FEDC 1645 #define REBOOT_MAGIC1 0xfee1dead 1646 #define REBOOT_MAGIC2 0x28121969 1647 #define REBOOT_MAGIC2A 0x05121996 1648 #define REBOOT_MAGIC2B 0x16041998 1649 1650 int 1651 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1652 { 1653 struct reboot_args bsd_args; 1654 1655 #ifdef DEBUG 1656 if (ldebug(reboot)) 1657 printf(ARGS(reboot, "0x%x"), args->cmd); 1658 #endif 1659 1660 if (args->magic1 != REBOOT_MAGIC1) 1661 return (EINVAL); 1662 1663 switch (args->magic2) { 1664 case REBOOT_MAGIC2: 1665 case REBOOT_MAGIC2A: 1666 case REBOOT_MAGIC2B: 1667 break; 1668 default: 1669 return (EINVAL); 1670 } 1671 1672 switch (args->cmd) { 1673 case REBOOT_CAD_ON: 1674 case REBOOT_CAD_OFF: 1675 return (priv_check(td, PRIV_REBOOT)); 1676 case REBOOT_HALT: 1677 bsd_args.opt = RB_HALT; 1678 break; 1679 case REBOOT_RESTART: 1680 case REBOOT_RESTART2: 1681 bsd_args.opt = 0; 1682 break; 1683 case REBOOT_POWEROFF: 1684 bsd_args.opt = RB_POWEROFF; 1685 break; 1686 default: 1687 return (EINVAL); 1688 } 1689 return (sys_reboot(td, &bsd_args)); 1690 } 1691 1692 1693 /* 1694 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1695 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1696 * are assumed to be preserved. The following lightweight syscalls fixes 1697 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1698 * 1699 * linux_getpid() - MP SAFE 1700 * linux_getgid() - MP SAFE 1701 * linux_getuid() - MP SAFE 1702 */ 1703 1704 int 1705 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1706 { 1707 1708 #ifdef DEBUG 1709 if (ldebug(getpid)) 1710 printf(ARGS(getpid, "")); 1711 #endif 1712 td->td_retval[0] = td->td_proc->p_pid; 1713 1714 return (0); 1715 } 1716 1717 int 1718 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1719 { 1720 struct linux_emuldata *em; 1721 1722 #ifdef DEBUG 1723 if (ldebug(gettid)) 1724 printf(ARGS(gettid, "")); 1725 #endif 1726 1727 em = em_find(td); 1728 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1729 1730 td->td_retval[0] = em->em_tid; 1731 1732 return (0); 1733 } 1734 1735 1736 int 1737 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1738 { 1739 1740 #ifdef DEBUG 1741 if (ldebug(getppid)) 1742 printf(ARGS(getppid, "")); 1743 #endif 1744 1745 td->td_retval[0] = kern_getppid(td); 1746 return (0); 1747 } 1748 1749 int 1750 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1751 { 1752 1753 #ifdef DEBUG 1754 if (ldebug(getgid)) 1755 printf(ARGS(getgid, "")); 1756 #endif 1757 1758 td->td_retval[0] = td->td_ucred->cr_rgid; 1759 return (0); 1760 } 1761 1762 int 1763 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1764 { 1765 1766 #ifdef DEBUG 1767 if (ldebug(getuid)) 1768 printf(ARGS(getuid, "")); 1769 #endif 1770 1771 td->td_retval[0] = td->td_ucred->cr_ruid; 1772 return (0); 1773 } 1774 1775 1776 int 1777 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1778 { 1779 struct getsid_args bsd; 1780 1781 #ifdef DEBUG 1782 if (ldebug(getsid)) 1783 printf(ARGS(getsid, "%i"), args->pid); 1784 #endif 1785 1786 bsd.pid = args->pid; 1787 return (sys_getsid(td, &bsd)); 1788 } 1789 1790 int 1791 linux_nosys(struct thread *td, struct nosys_args *ignore) 1792 { 1793 1794 return (ENOSYS); 1795 } 1796 1797 int 1798 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1799 { 1800 struct getpriority_args bsd_args; 1801 int error; 1802 1803 #ifdef DEBUG 1804 if (ldebug(getpriority)) 1805 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1806 #endif 1807 1808 bsd_args.which = args->which; 1809 bsd_args.who = args->who; 1810 error = sys_getpriority(td, &bsd_args); 1811 td->td_retval[0] = 20 - td->td_retval[0]; 1812 return (error); 1813 } 1814 1815 int 1816 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1817 { 1818 int name[2]; 1819 1820 #ifdef DEBUG 1821 if (ldebug(sethostname)) 1822 printf(ARGS(sethostname, "*, %i"), args->len); 1823 #endif 1824 1825 name[0] = CTL_KERN; 1826 name[1] = KERN_HOSTNAME; 1827 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1828 args->len, 0, 0)); 1829 } 1830 1831 int 1832 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1833 { 1834 int name[2]; 1835 1836 #ifdef DEBUG 1837 if (ldebug(setdomainname)) 1838 printf(ARGS(setdomainname, "*, %i"), args->len); 1839 #endif 1840 1841 name[0] = CTL_KERN; 1842 name[1] = KERN_NISDOMAINNAME; 1843 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1844 args->len, 0, 0)); 1845 } 1846 1847 int 1848 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1849 { 1850 1851 #ifdef DEBUG 1852 if (ldebug(exit_group)) 1853 printf(ARGS(exit_group, "%i"), args->error_code); 1854 #endif 1855 1856 LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid, 1857 args->error_code); 1858 1859 /* 1860 * XXX: we should send a signal to the parent if 1861 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1862 * as it doesnt occur often. 1863 */ 1864 exit1(td, args->error_code, 0); 1865 /* NOTREACHED */ 1866 } 1867 1868 #define _LINUX_CAPABILITY_VERSION_1 0x19980330 1869 #define _LINUX_CAPABILITY_VERSION_2 0x20071026 1870 #define _LINUX_CAPABILITY_VERSION_3 0x20080522 1871 1872 struct l_user_cap_header { 1873 l_int version; 1874 l_int pid; 1875 }; 1876 1877 struct l_user_cap_data { 1878 l_int effective; 1879 l_int permitted; 1880 l_int inheritable; 1881 }; 1882 1883 int 1884 linux_capget(struct thread *td, struct linux_capget_args *uap) 1885 { 1886 struct l_user_cap_header luch; 1887 struct l_user_cap_data lucd[2]; 1888 int error, u32s; 1889 1890 if (uap->hdrp == NULL) 1891 return (EFAULT); 1892 1893 error = copyin(uap->hdrp, &luch, sizeof(luch)); 1894 if (error != 0) 1895 return (error); 1896 1897 switch (luch.version) { 1898 case _LINUX_CAPABILITY_VERSION_1: 1899 u32s = 1; 1900 break; 1901 case _LINUX_CAPABILITY_VERSION_2: 1902 case _LINUX_CAPABILITY_VERSION_3: 1903 u32s = 2; 1904 break; 1905 default: 1906 #ifdef DEBUG 1907 if (ldebug(capget)) 1908 printf(LMSG("invalid capget capability version 0x%x"), 1909 luch.version); 1910 #endif 1911 luch.version = _LINUX_CAPABILITY_VERSION_1; 1912 error = copyout(&luch, uap->hdrp, sizeof(luch)); 1913 if (error) 1914 return (error); 1915 return (EINVAL); 1916 } 1917 1918 if (luch.pid) 1919 return (EPERM); 1920 1921 if (uap->datap) { 1922 /* 1923 * The current implementation doesn't support setting 1924 * a capability (it's essentially a stub) so indicate 1925 * that no capabilities are currently set or available 1926 * to request. 1927 */ 1928 memset(&lucd, 0, u32s * sizeof(lucd[0])); 1929 error = copyout(&lucd, uap->datap, u32s * sizeof(lucd[0])); 1930 } 1931 1932 return (error); 1933 } 1934 1935 int 1936 linux_capset(struct thread *td, struct linux_capset_args *uap) 1937 { 1938 struct l_user_cap_header luch; 1939 struct l_user_cap_data lucd[2]; 1940 int error, i, u32s; 1941 1942 if (uap->hdrp == NULL || uap->datap == NULL) 1943 return (EFAULT); 1944 1945 error = copyin(uap->hdrp, &luch, sizeof(luch)); 1946 if (error != 0) 1947 return (error); 1948 1949 switch (luch.version) { 1950 case _LINUX_CAPABILITY_VERSION_1: 1951 u32s = 1; 1952 break; 1953 case _LINUX_CAPABILITY_VERSION_2: 1954 case _LINUX_CAPABILITY_VERSION_3: 1955 u32s = 2; 1956 break; 1957 default: 1958 #ifdef DEBUG 1959 if (ldebug(capset)) 1960 printf(LMSG("invalid capset capability version 0x%x"), 1961 luch.version); 1962 #endif 1963 luch.version = _LINUX_CAPABILITY_VERSION_1; 1964 error = copyout(&luch, uap->hdrp, sizeof(luch)); 1965 if (error) 1966 return (error); 1967 return (EINVAL); 1968 } 1969 1970 if (luch.pid) 1971 return (EPERM); 1972 1973 error = copyin(uap->datap, &lucd, u32s * sizeof(lucd[0])); 1974 if (error != 0) 1975 return (error); 1976 1977 /* We currently don't support setting any capabilities. */ 1978 for (i = 0; i < u32s; i++) { 1979 if (lucd[i].effective || lucd[i].permitted || 1980 lucd[i].inheritable) { 1981 linux_msg(td, 1982 "capset[%d] effective=0x%x, permitted=0x%x, " 1983 "inheritable=0x%x is not implemented", i, 1984 (int)lucd[i].effective, (int)lucd[i].permitted, 1985 (int)lucd[i].inheritable); 1986 return (EPERM); 1987 } 1988 } 1989 1990 return (0); 1991 } 1992 1993 int 1994 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1995 { 1996 int error = 0, max_size; 1997 struct proc *p = td->td_proc; 1998 char comm[LINUX_MAX_COMM_LEN]; 1999 int pdeath_signal; 2000 2001 #ifdef DEBUG 2002 if (ldebug(prctl)) 2003 printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option, 2004 (uintmax_t)args->arg2, (uintmax_t)args->arg3, 2005 (uintmax_t)args->arg4, (uintmax_t)args->arg5); 2006 #endif 2007 2008 switch (args->option) { 2009 case LINUX_PR_SET_PDEATHSIG: 2010 if (!LINUX_SIG_VALID(args->arg2)) 2011 return (EINVAL); 2012 pdeath_signal = linux_to_bsd_signal(args->arg2); 2013 return (kern_procctl(td, P_PID, 0, PROC_PDEATHSIG_CTL, 2014 &pdeath_signal)); 2015 case LINUX_PR_GET_PDEATHSIG: 2016 error = kern_procctl(td, P_PID, 0, PROC_PDEATHSIG_STATUS, 2017 &pdeath_signal); 2018 if (error != 0) 2019 return (error); 2020 pdeath_signal = bsd_to_linux_signal(pdeath_signal); 2021 return (copyout(&pdeath_signal, 2022 (void *)(register_t)args->arg2, 2023 sizeof(pdeath_signal))); 2024 break; 2025 case LINUX_PR_GET_KEEPCAPS: 2026 /* 2027 * Indicate that we always clear the effective and 2028 * permitted capability sets when the user id becomes 2029 * non-zero (actually the capability sets are simply 2030 * always zero in the current implementation). 2031 */ 2032 td->td_retval[0] = 0; 2033 break; 2034 case LINUX_PR_SET_KEEPCAPS: 2035 /* 2036 * Ignore requests to keep the effective and permitted 2037 * capability sets when the user id becomes non-zero. 2038 */ 2039 break; 2040 case LINUX_PR_SET_NAME: 2041 /* 2042 * To be on the safe side we need to make sure to not 2043 * overflow the size a Linux program expects. We already 2044 * do this here in the copyin, so that we don't need to 2045 * check on copyout. 2046 */ 2047 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 2048 error = copyinstr((void *)(register_t)args->arg2, comm, 2049 max_size, NULL); 2050 2051 /* Linux silently truncates the name if it is too long. */ 2052 if (error == ENAMETOOLONG) { 2053 /* 2054 * XXX: copyinstr() isn't documented to populate the 2055 * array completely, so do a copyin() to be on the 2056 * safe side. This should be changed in case 2057 * copyinstr() is changed to guarantee this. 2058 */ 2059 error = copyin((void *)(register_t)args->arg2, comm, 2060 max_size - 1); 2061 comm[max_size - 1] = '\0'; 2062 } 2063 if (error) 2064 return (error); 2065 2066 PROC_LOCK(p); 2067 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 2068 PROC_UNLOCK(p); 2069 break; 2070 case LINUX_PR_GET_NAME: 2071 PROC_LOCK(p); 2072 strlcpy(comm, p->p_comm, sizeof(comm)); 2073 PROC_UNLOCK(p); 2074 error = copyout(comm, (void *)(register_t)args->arg2, 2075 strlen(comm) + 1); 2076 break; 2077 default: 2078 error = EINVAL; 2079 break; 2080 } 2081 2082 return (error); 2083 } 2084 2085 int 2086 linux_sched_setparam(struct thread *td, 2087 struct linux_sched_setparam_args *uap) 2088 { 2089 struct sched_param sched_param; 2090 struct thread *tdt; 2091 int error; 2092 2093 #ifdef DEBUG 2094 if (ldebug(sched_setparam)) 2095 printf(ARGS(sched_setparam, "%d, *"), uap->pid); 2096 #endif 2097 2098 error = copyin(uap->param, &sched_param, sizeof(sched_param)); 2099 if (error) 2100 return (error); 2101 2102 tdt = linux_tdfind(td, uap->pid, -1); 2103 if (tdt == NULL) 2104 return (ESRCH); 2105 2106 error = kern_sched_setparam(td, tdt, &sched_param); 2107 PROC_UNLOCK(tdt->td_proc); 2108 return (error); 2109 } 2110 2111 int 2112 linux_sched_getparam(struct thread *td, 2113 struct linux_sched_getparam_args *uap) 2114 { 2115 struct sched_param sched_param; 2116 struct thread *tdt; 2117 int error; 2118 2119 #ifdef DEBUG 2120 if (ldebug(sched_getparam)) 2121 printf(ARGS(sched_getparam, "%d, *"), uap->pid); 2122 #endif 2123 2124 tdt = linux_tdfind(td, uap->pid, -1); 2125 if (tdt == NULL) 2126 return (ESRCH); 2127 2128 error = kern_sched_getparam(td, tdt, &sched_param); 2129 PROC_UNLOCK(tdt->td_proc); 2130 if (error == 0) 2131 error = copyout(&sched_param, uap->param, 2132 sizeof(sched_param)); 2133 return (error); 2134 } 2135 2136 /* 2137 * Get affinity of a process. 2138 */ 2139 int 2140 linux_sched_getaffinity(struct thread *td, 2141 struct linux_sched_getaffinity_args *args) 2142 { 2143 int error; 2144 struct thread *tdt; 2145 2146 #ifdef DEBUG 2147 if (ldebug(sched_getaffinity)) 2148 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2149 args->len); 2150 #endif 2151 if (args->len < sizeof(cpuset_t)) 2152 return (EINVAL); 2153 2154 tdt = linux_tdfind(td, args->pid, -1); 2155 if (tdt == NULL) 2156 return (ESRCH); 2157 2158 PROC_UNLOCK(tdt->td_proc); 2159 2160 error = kern_cpuset_getaffinity(td, CPU_LEVEL_WHICH, CPU_WHICH_TID, 2161 tdt->td_tid, sizeof(cpuset_t), (cpuset_t *)args->user_mask_ptr); 2162 if (error == 0) 2163 td->td_retval[0] = sizeof(cpuset_t); 2164 2165 return (error); 2166 } 2167 2168 /* 2169 * Set affinity of a process. 2170 */ 2171 int 2172 linux_sched_setaffinity(struct thread *td, 2173 struct linux_sched_setaffinity_args *args) 2174 { 2175 struct thread *tdt; 2176 2177 #ifdef DEBUG 2178 if (ldebug(sched_setaffinity)) 2179 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2180 args->len); 2181 #endif 2182 if (args->len < sizeof(cpuset_t)) 2183 return (EINVAL); 2184 2185 tdt = linux_tdfind(td, args->pid, -1); 2186 if (tdt == NULL) 2187 return (ESRCH); 2188 2189 PROC_UNLOCK(tdt->td_proc); 2190 2191 return (kern_cpuset_setaffinity(td, CPU_LEVEL_WHICH, CPU_WHICH_TID, 2192 tdt->td_tid, sizeof(cpuset_t), (cpuset_t *) args->user_mask_ptr)); 2193 } 2194 2195 struct linux_rlimit64 { 2196 uint64_t rlim_cur; 2197 uint64_t rlim_max; 2198 }; 2199 2200 int 2201 linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2202 { 2203 struct rlimit rlim, nrlim; 2204 struct linux_rlimit64 lrlim; 2205 struct proc *p; 2206 u_int which; 2207 int flags; 2208 int error; 2209 2210 #ifdef DEBUG 2211 if (ldebug(prlimit64)) 2212 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2213 args->resource, (void *)args->new, (void *)args->old); 2214 #endif 2215 2216 if (args->resource >= LINUX_RLIM_NLIMITS) 2217 return (EINVAL); 2218 2219 which = linux_to_bsd_resource[args->resource]; 2220 if (which == -1) 2221 return (EINVAL); 2222 2223 if (args->new != NULL) { 2224 /* 2225 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2226 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2227 * as INFINITY so we do not need a conversion even. 2228 */ 2229 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2230 if (error != 0) 2231 return (error); 2232 } 2233 2234 flags = PGET_HOLD | PGET_NOTWEXIT; 2235 if (args->new != NULL) 2236 flags |= PGET_CANDEBUG; 2237 else 2238 flags |= PGET_CANSEE; 2239 error = pget(args->pid, flags, &p); 2240 if (error != 0) 2241 return (error); 2242 2243 if (args->old != NULL) { 2244 PROC_LOCK(p); 2245 lim_rlimit_proc(p, which, &rlim); 2246 PROC_UNLOCK(p); 2247 if (rlim.rlim_cur == RLIM_INFINITY) 2248 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2249 else 2250 lrlim.rlim_cur = rlim.rlim_cur; 2251 if (rlim.rlim_max == RLIM_INFINITY) 2252 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2253 else 2254 lrlim.rlim_max = rlim.rlim_max; 2255 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2256 if (error != 0) 2257 goto out; 2258 } 2259 2260 if (args->new != NULL) 2261 error = kern_proc_setrlimit(td, p, which, &nrlim); 2262 2263 out: 2264 PRELE(p); 2265 return (error); 2266 } 2267 2268 int 2269 linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2270 { 2271 struct timeval utv, tv0, tv1, *tvp; 2272 struct l_pselect6arg lpse6; 2273 struct l_timespec lts; 2274 struct timespec uts; 2275 l_sigset_t l_ss; 2276 sigset_t *ssp; 2277 sigset_t ss; 2278 int error; 2279 2280 ssp = NULL; 2281 if (args->sig != NULL) { 2282 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2283 if (error != 0) 2284 return (error); 2285 if (lpse6.ss_len != sizeof(l_ss)) 2286 return (EINVAL); 2287 if (lpse6.ss != 0) { 2288 error = copyin(PTRIN(lpse6.ss), &l_ss, 2289 sizeof(l_ss)); 2290 if (error != 0) 2291 return (error); 2292 linux_to_bsd_sigset(&l_ss, &ss); 2293 ssp = &ss; 2294 } 2295 } 2296 2297 /* 2298 * Currently glibc changes nanosecond number to microsecond. 2299 * This mean losing precision but for now it is hardly seen. 2300 */ 2301 if (args->tsp != NULL) { 2302 error = copyin(args->tsp, <s, sizeof(lts)); 2303 if (error != 0) 2304 return (error); 2305 error = linux_to_native_timespec(&uts, <s); 2306 if (error != 0) 2307 return (error); 2308 2309 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2310 if (itimerfix(&utv)) 2311 return (EINVAL); 2312 2313 microtime(&tv0); 2314 tvp = &utv; 2315 } else 2316 tvp = NULL; 2317 2318 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2319 args->exceptfds, tvp, ssp, LINUX_NFDBITS); 2320 2321 if (error == 0 && args->tsp != NULL) { 2322 if (td->td_retval[0] != 0) { 2323 /* 2324 * Compute how much time was left of the timeout, 2325 * by subtracting the current time and the time 2326 * before we started the call, and subtracting 2327 * that result from the user-supplied value. 2328 */ 2329 2330 microtime(&tv1); 2331 timevalsub(&tv1, &tv0); 2332 timevalsub(&utv, &tv1); 2333 if (utv.tv_sec < 0) 2334 timevalclear(&utv); 2335 } else 2336 timevalclear(&utv); 2337 2338 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2339 2340 error = native_to_linux_timespec(<s, &uts); 2341 if (error == 0) 2342 error = copyout(<s, args->tsp, sizeof(lts)); 2343 } 2344 2345 return (error); 2346 } 2347 2348 int 2349 linux_ppoll(struct thread *td, struct linux_ppoll_args *args) 2350 { 2351 struct timespec ts0, ts1; 2352 struct l_timespec lts; 2353 struct timespec uts, *tsp; 2354 l_sigset_t l_ss; 2355 sigset_t *ssp; 2356 sigset_t ss; 2357 int error; 2358 2359 if (args->sset != NULL) { 2360 if (args->ssize != sizeof(l_ss)) 2361 return (EINVAL); 2362 error = copyin(args->sset, &l_ss, sizeof(l_ss)); 2363 if (error) 2364 return (error); 2365 linux_to_bsd_sigset(&l_ss, &ss); 2366 ssp = &ss; 2367 } else 2368 ssp = NULL; 2369 if (args->tsp != NULL) { 2370 error = copyin(args->tsp, <s, sizeof(lts)); 2371 if (error) 2372 return (error); 2373 error = linux_to_native_timespec(&uts, <s); 2374 if (error != 0) 2375 return (error); 2376 2377 nanotime(&ts0); 2378 tsp = &uts; 2379 } else 2380 tsp = NULL; 2381 2382 error = kern_poll(td, args->fds, args->nfds, tsp, ssp); 2383 2384 if (error == 0 && args->tsp != NULL) { 2385 if (td->td_retval[0]) { 2386 nanotime(&ts1); 2387 timespecsub(&ts1, &ts0); 2388 timespecsub(&uts, &ts1); 2389 if (uts.tv_sec < 0) 2390 timespecclear(&uts); 2391 } else 2392 timespecclear(&uts); 2393 2394 error = native_to_linux_timespec(<s, &uts); 2395 if (error == 0) 2396 error = copyout(<s, args->tsp, sizeof(lts)); 2397 } 2398 2399 return (error); 2400 } 2401 2402 #if defined(DEBUG) || defined(KTR) 2403 /* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2404 2405 #ifdef COMPAT_LINUX32 2406 #define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL 2407 #else 2408 #define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL 2409 #endif 2410 2411 u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))]; 2412 2413 static int 2414 linux_debug(int syscall, int toggle, int global) 2415 { 2416 2417 if (global) { 2418 char c = toggle ? 0 : 0xff; 2419 2420 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2421 return (0); 2422 } 2423 if (syscall < 0 || syscall >= L_MAXSYSCALL) 2424 return (EINVAL); 2425 if (toggle) 2426 clrbit(linux_debug_map, syscall); 2427 else 2428 setbit(linux_debug_map, syscall); 2429 return (0); 2430 } 2431 #undef L_MAXSYSCALL 2432 2433 /* 2434 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2435 * 2436 * E.g.: sysctl linux.debug=21.0 2437 * 2438 * As a special case, syscall "all" will apply to all syscalls globally. 2439 */ 2440 #define LINUX_MAX_DEBUGSTR 16 2441 int 2442 linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2443 { 2444 char value[LINUX_MAX_DEBUGSTR], *p; 2445 int error, sysc, toggle; 2446 int global = 0; 2447 2448 value[0] = '\0'; 2449 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2450 if (error || req->newptr == NULL) 2451 return (error); 2452 for (p = value; *p != '\0' && *p != '.'; p++); 2453 if (*p == '\0') 2454 return (EINVAL); 2455 *p++ = '\0'; 2456 sysc = strtol(value, NULL, 0); 2457 toggle = strtol(p, NULL, 0); 2458 if (strcmp(value, "all") == 0) 2459 global = 1; 2460 error = linux_debug(sysc, toggle, global); 2461 return (error); 2462 } 2463 2464 #endif /* DEBUG || KTR */ 2465 2466 int 2467 linux_sched_rr_get_interval(struct thread *td, 2468 struct linux_sched_rr_get_interval_args *uap) 2469 { 2470 struct timespec ts; 2471 struct l_timespec lts; 2472 struct thread *tdt; 2473 int error; 2474 2475 /* 2476 * According to man in case the invalid pid specified 2477 * EINVAL should be returned. 2478 */ 2479 if (uap->pid < 0) 2480 return (EINVAL); 2481 2482 tdt = linux_tdfind(td, uap->pid, -1); 2483 if (tdt == NULL) 2484 return (ESRCH); 2485 2486 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2487 PROC_UNLOCK(tdt->td_proc); 2488 if (error != 0) 2489 return (error); 2490 error = native_to_linux_timespec(<s, &ts); 2491 if (error != 0) 2492 return (error); 2493 return (copyout(<s, uap->interval, sizeof(lts))); 2494 } 2495 2496 /* 2497 * In case when the Linux thread is the initial thread in 2498 * the thread group thread id is equal to the process id. 2499 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2500 */ 2501 struct thread * 2502 linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2503 { 2504 struct linux_emuldata *em; 2505 struct thread *tdt; 2506 struct proc *p; 2507 2508 tdt = NULL; 2509 if (tid == 0 || tid == td->td_tid) { 2510 tdt = td; 2511 PROC_LOCK(tdt->td_proc); 2512 } else if (tid > PID_MAX) 2513 tdt = tdfind(tid, pid); 2514 else { 2515 /* 2516 * Initial thread where the tid equal to the pid. 2517 */ 2518 p = pfind(tid); 2519 if (p != NULL) { 2520 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2521 /* 2522 * p is not a Linuxulator process. 2523 */ 2524 PROC_UNLOCK(p); 2525 return (NULL); 2526 } 2527 FOREACH_THREAD_IN_PROC(p, tdt) { 2528 em = em_find(tdt); 2529 if (tid == em->em_tid) 2530 return (tdt); 2531 } 2532 PROC_UNLOCK(p); 2533 } 2534 return (NULL); 2535 } 2536 2537 return (tdt); 2538 } 2539 2540 void 2541 linux_to_bsd_waitopts(int options, int *bsdopts) 2542 { 2543 2544 if (options & LINUX_WNOHANG) 2545 *bsdopts |= WNOHANG; 2546 if (options & LINUX_WUNTRACED) 2547 *bsdopts |= WUNTRACED; 2548 if (options & LINUX_WEXITED) 2549 *bsdopts |= WEXITED; 2550 if (options & LINUX_WCONTINUED) 2551 *bsdopts |= WCONTINUED; 2552 if (options & LINUX_WNOWAIT) 2553 *bsdopts |= WNOWAIT; 2554 2555 if (options & __WCLONE) 2556 *bsdopts |= WLINUXCLONE; 2557 } 2558 2559 int 2560 linux_getrandom(struct thread *td, struct linux_getrandom_args *args) 2561 { 2562 struct uio uio; 2563 struct iovec iov; 2564 int error; 2565 2566 if (args->flags & ~(LINUX_GRND_NONBLOCK|LINUX_GRND_RANDOM)) 2567 return (EINVAL); 2568 if (args->count > INT_MAX) 2569 args->count = INT_MAX; 2570 2571 iov.iov_base = args->buf; 2572 iov.iov_len = args->count; 2573 2574 uio.uio_iov = &iov; 2575 uio.uio_iovcnt = 1; 2576 uio.uio_resid = iov.iov_len; 2577 uio.uio_segflg = UIO_USERSPACE; 2578 uio.uio_rw = UIO_READ; 2579 uio.uio_td = td; 2580 2581 error = read_random_uio(&uio, args->flags & LINUX_GRND_NONBLOCK); 2582 if (error == 0) 2583 td->td_retval[0] = args->count - uio.uio_resid; 2584 return (error); 2585 } 2586 2587 int 2588 linux_mincore(struct thread *td, struct linux_mincore_args *args) 2589 { 2590 2591 /* Needs to be page-aligned */ 2592 if (args->start & PAGE_MASK) 2593 return (EINVAL); 2594 return (kern_mincore(td, args->start, args->len, args->vec)); 2595 }
Cache object: e0d62ed2f9b97a0d21da2d5e44bca1e2
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