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