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 successfull. 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 } 899 900 if (times[0].tv_nsec == UTIME_OMIT && times[1].tv_nsec == UTIME_OMIT) 901 /* This breaks POSIX, but is what the Linux kernel does 902 * _on purpose_ (documented in the man page for utimensat(2)), 903 * so we must follow that behaviour. */ 904 return (0); 905 906 if (args->pathname != NULL) 907 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 908 else if (args->flags != 0) 909 return (EINVAL); 910 911 if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) 912 flags |= AT_SYMLINK_NOFOLLOW; 913 914 if (path == NULL) 915 error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE); 916 else { 917 error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp, 918 UIO_SYSSPACE, flags); 919 LFREEPATH(path); 920 } 921 922 return (error); 923 } 924 925 int 926 linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 927 { 928 l_timeval ltv[2]; 929 struct timeval tv[2], *tvp = NULL; 930 char *fname; 931 int error, dfd; 932 933 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 934 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 935 936 #ifdef DEBUG 937 if (ldebug(futimesat)) 938 printf(ARGS(futimesat, "%s, *"), fname); 939 #endif 940 941 if (args->utimes != NULL) { 942 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 943 LFREEPATH(fname); 944 return (error); 945 } 946 tv[0].tv_sec = ltv[0].tv_sec; 947 tv[0].tv_usec = ltv[0].tv_usec; 948 tv[1].tv_sec = ltv[1].tv_sec; 949 tv[1].tv_usec = ltv[1].tv_usec; 950 tvp = tv; 951 } 952 953 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 954 LFREEPATH(fname); 955 return (error); 956 } 957 958 int 959 linux_common_wait(struct thread *td, int pid, int *status, 960 int options, struct rusage *ru) 961 { 962 int error, tmpstat; 963 964 error = kern_wait(td, pid, &tmpstat, options, ru); 965 if (error) 966 return (error); 967 968 if (status) { 969 tmpstat &= 0xffff; 970 if (WIFSIGNALED(tmpstat)) 971 tmpstat = (tmpstat & 0xffffff80) | 972 bsd_to_linux_signal(WTERMSIG(tmpstat)); 973 else if (WIFSTOPPED(tmpstat)) 974 tmpstat = (tmpstat & 0xffff00ff) | 975 (bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8); 976 else if (WIFCONTINUED(tmpstat)) 977 tmpstat = 0xffff; 978 error = copyout(&tmpstat, status, sizeof(int)); 979 } 980 981 return (error); 982 } 983 984 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 985 int 986 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 987 { 988 struct linux_wait4_args wait4_args; 989 990 #ifdef DEBUG 991 if (ldebug(waitpid)) 992 printf(ARGS(waitpid, "%d, %p, %d"), 993 args->pid, (void *)args->status, args->options); 994 #endif 995 996 wait4_args.pid = args->pid; 997 wait4_args.status = args->status; 998 wait4_args.options = args->options; 999 wait4_args.rusage = NULL; 1000 1001 return (linux_wait4(td, &wait4_args)); 1002 } 1003 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1004 1005 int 1006 linux_wait4(struct thread *td, struct linux_wait4_args *args) 1007 { 1008 int error, options; 1009 struct rusage ru, *rup; 1010 1011 #ifdef DEBUG 1012 if (ldebug(wait4)) 1013 printf(ARGS(wait4, "%d, %p, %d, %p"), 1014 args->pid, (void *)args->status, args->options, 1015 (void *)args->rusage); 1016 #endif 1017 if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG | 1018 LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL)) 1019 return (EINVAL); 1020 1021 options = WEXITED; 1022 linux_to_bsd_waitopts(args->options, &options); 1023 1024 if (args->rusage != NULL) 1025 rup = &ru; 1026 else 1027 rup = NULL; 1028 error = linux_common_wait(td, args->pid, args->status, options, rup); 1029 if (error != 0) 1030 return (error); 1031 if (args->rusage != NULL) 1032 error = linux_copyout_rusage(&ru, args->rusage); 1033 return (error); 1034 } 1035 1036 int 1037 linux_waitid(struct thread *td, struct linux_waitid_args *args) 1038 { 1039 int status, options, sig; 1040 struct __wrusage wru; 1041 siginfo_t siginfo; 1042 l_siginfo_t lsi; 1043 idtype_t idtype; 1044 struct proc *p; 1045 int error; 1046 1047 options = 0; 1048 linux_to_bsd_waitopts(args->options, &options); 1049 1050 if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED)) 1051 return (EINVAL); 1052 if (!(options & (WEXITED | WUNTRACED | WCONTINUED))) 1053 return (EINVAL); 1054 1055 switch (args->idtype) { 1056 case LINUX_P_ALL: 1057 idtype = P_ALL; 1058 break; 1059 case LINUX_P_PID: 1060 if (args->id <= 0) 1061 return (EINVAL); 1062 idtype = P_PID; 1063 break; 1064 case LINUX_P_PGID: 1065 if (args->id <= 0) 1066 return (EINVAL); 1067 idtype = P_PGID; 1068 break; 1069 default: 1070 return (EINVAL); 1071 } 1072 1073 error = kern_wait6(td, idtype, args->id, &status, options, 1074 &wru, &siginfo); 1075 if (error != 0) 1076 return (error); 1077 if (args->rusage != NULL) { 1078 error = linux_copyout_rusage(&wru.wru_children, 1079 args->rusage); 1080 if (error != 0) 1081 return (error); 1082 } 1083 if (args->info != NULL) { 1084 p = td->td_proc; 1085 if (td->td_retval[0] == 0) 1086 bzero(&lsi, sizeof(lsi)); 1087 else { 1088 sig = bsd_to_linux_signal(siginfo.si_signo); 1089 siginfo_to_lsiginfo(&siginfo, &lsi, sig); 1090 } 1091 error = copyout(&lsi, args->info, sizeof(lsi)); 1092 } 1093 td->td_retval[0] = 0; 1094 1095 return (error); 1096 } 1097 1098 int 1099 linux_mknod(struct thread *td, struct linux_mknod_args *args) 1100 { 1101 char *path; 1102 int error; 1103 1104 LCONVPATHCREAT(td, args->path, &path); 1105 1106 #ifdef DEBUG 1107 if (ldebug(mknod)) 1108 printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode, 1109 (uintmax_t)args->dev); 1110 #endif 1111 1112 switch (args->mode & S_IFMT) { 1113 case S_IFIFO: 1114 case S_IFSOCK: 1115 error = kern_mkfifoat(td, AT_FDCWD, path, UIO_SYSSPACE, 1116 args->mode); 1117 break; 1118 1119 case S_IFCHR: 1120 case S_IFBLK: 1121 error = kern_mknodat(td, AT_FDCWD, path, UIO_SYSSPACE, 1122 args->mode, args->dev); 1123 break; 1124 1125 case S_IFDIR: 1126 error = EPERM; 1127 break; 1128 1129 case 0: 1130 args->mode |= S_IFREG; 1131 /* FALLTHROUGH */ 1132 case S_IFREG: 1133 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, 1134 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1135 if (error == 0) 1136 kern_close(td, td->td_retval[0]); 1137 break; 1138 1139 default: 1140 error = EINVAL; 1141 break; 1142 } 1143 LFREEPATH(path); 1144 return (error); 1145 } 1146 1147 int 1148 linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 1149 { 1150 char *path; 1151 int error, dfd; 1152 1153 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1154 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 1155 1156 #ifdef DEBUG 1157 if (ldebug(mknodat)) 1158 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 1159 #endif 1160 1161 switch (args->mode & S_IFMT) { 1162 case S_IFIFO: 1163 case S_IFSOCK: 1164 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 1165 break; 1166 1167 case S_IFCHR: 1168 case S_IFBLK: 1169 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 1170 args->dev); 1171 break; 1172 1173 case S_IFDIR: 1174 error = EPERM; 1175 break; 1176 1177 case 0: 1178 args->mode |= S_IFREG; 1179 /* FALLTHROUGH */ 1180 case S_IFREG: 1181 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 1182 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 1183 if (error == 0) 1184 kern_close(td, td->td_retval[0]); 1185 break; 1186 1187 default: 1188 error = EINVAL; 1189 break; 1190 } 1191 LFREEPATH(path); 1192 return (error); 1193 } 1194 1195 /* 1196 * UGH! This is just about the dumbest idea I've ever heard!! 1197 */ 1198 int 1199 linux_personality(struct thread *td, struct linux_personality_args *args) 1200 { 1201 #ifdef DEBUG 1202 if (ldebug(personality)) 1203 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1204 #endif 1205 if (args->per != 0) 1206 return (EINVAL); 1207 1208 /* Yes Jim, it's still a Linux... */ 1209 td->td_retval[0] = 0; 1210 return (0); 1211 } 1212 1213 struct l_itimerval { 1214 l_timeval it_interval; 1215 l_timeval it_value; 1216 }; 1217 1218 #define B2L_ITIMERVAL(bip, lip) \ 1219 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1220 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1221 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1222 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1223 1224 int 1225 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1226 { 1227 int error; 1228 struct l_itimerval ls; 1229 struct itimerval aitv, oitv; 1230 1231 #ifdef DEBUG 1232 if (ldebug(setitimer)) 1233 printf(ARGS(setitimer, "%p, %p"), 1234 (void *)uap->itv, (void *)uap->oitv); 1235 #endif 1236 1237 if (uap->itv == NULL) { 1238 uap->itv = uap->oitv; 1239 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1240 } 1241 1242 error = copyin(uap->itv, &ls, sizeof(ls)); 1243 if (error != 0) 1244 return (error); 1245 B2L_ITIMERVAL(&aitv, &ls); 1246 #ifdef DEBUG 1247 if (ldebug(setitimer)) { 1248 printf("setitimer: value: sec: %jd, usec: %ld\n", 1249 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1250 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1251 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1252 } 1253 #endif 1254 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1255 if (error != 0 || uap->oitv == NULL) 1256 return (error); 1257 B2L_ITIMERVAL(&ls, &oitv); 1258 1259 return (copyout(&ls, uap->oitv, sizeof(ls))); 1260 } 1261 1262 int 1263 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1264 { 1265 int error; 1266 struct l_itimerval ls; 1267 struct itimerval aitv; 1268 1269 #ifdef DEBUG 1270 if (ldebug(getitimer)) 1271 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1272 #endif 1273 error = kern_getitimer(td, uap->which, &aitv); 1274 if (error != 0) 1275 return (error); 1276 B2L_ITIMERVAL(&ls, &aitv); 1277 return (copyout(&ls, uap->itv, sizeof(ls))); 1278 } 1279 1280 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1281 int 1282 linux_nice(struct thread *td, struct linux_nice_args *args) 1283 { 1284 struct setpriority_args bsd_args; 1285 1286 bsd_args.which = PRIO_PROCESS; 1287 bsd_args.who = 0; /* current process */ 1288 bsd_args.prio = args->inc; 1289 return (sys_setpriority(td, &bsd_args)); 1290 } 1291 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1292 1293 int 1294 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1295 { 1296 struct ucred *newcred, *oldcred; 1297 l_gid_t *linux_gidset; 1298 gid_t *bsd_gidset; 1299 int ngrp, error; 1300 struct proc *p; 1301 1302 ngrp = args->gidsetsize; 1303 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1304 return (EINVAL); 1305 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK); 1306 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1307 if (error) 1308 goto out; 1309 newcred = crget(); 1310 crextend(newcred, ngrp + 1); 1311 p = td->td_proc; 1312 PROC_LOCK(p); 1313 oldcred = p->p_ucred; 1314 crcopy(newcred, oldcred); 1315 1316 /* 1317 * cr_groups[0] holds egid. Setting the whole set from 1318 * the supplied set will cause egid to be changed too. 1319 * Keep cr_groups[0] unchanged to prevent that. 1320 */ 1321 1322 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1323 PROC_UNLOCK(p); 1324 crfree(newcred); 1325 goto out; 1326 } 1327 1328 if (ngrp > 0) { 1329 newcred->cr_ngroups = ngrp + 1; 1330 1331 bsd_gidset = newcred->cr_groups; 1332 ngrp--; 1333 while (ngrp >= 0) { 1334 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1335 ngrp--; 1336 } 1337 } else 1338 newcred->cr_ngroups = 1; 1339 1340 setsugid(p); 1341 proc_set_cred(p, newcred); 1342 PROC_UNLOCK(p); 1343 crfree(oldcred); 1344 error = 0; 1345 out: 1346 free(linux_gidset, M_LINUX); 1347 return (error); 1348 } 1349 1350 int 1351 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1352 { 1353 struct ucred *cred; 1354 l_gid_t *linux_gidset; 1355 gid_t *bsd_gidset; 1356 int bsd_gidsetsz, ngrp, error; 1357 1358 cred = td->td_ucred; 1359 bsd_gidset = cred->cr_groups; 1360 bsd_gidsetsz = cred->cr_ngroups - 1; 1361 1362 /* 1363 * cr_groups[0] holds egid. Returning the whole set 1364 * here will cause a duplicate. Exclude cr_groups[0] 1365 * to prevent that. 1366 */ 1367 1368 if ((ngrp = args->gidsetsize) == 0) { 1369 td->td_retval[0] = bsd_gidsetsz; 1370 return (0); 1371 } 1372 1373 if (ngrp < bsd_gidsetsz) 1374 return (EINVAL); 1375 1376 ngrp = 0; 1377 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1378 M_LINUX, M_WAITOK); 1379 while (ngrp < bsd_gidsetsz) { 1380 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1381 ngrp++; 1382 } 1383 1384 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1385 free(linux_gidset, M_LINUX); 1386 if (error) 1387 return (error); 1388 1389 td->td_retval[0] = ngrp; 1390 return (0); 1391 } 1392 1393 int 1394 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1395 { 1396 struct rlimit bsd_rlim; 1397 struct l_rlimit rlim; 1398 u_int which; 1399 int error; 1400 1401 #ifdef DEBUG 1402 if (ldebug(setrlimit)) 1403 printf(ARGS(setrlimit, "%d, %p"), 1404 args->resource, (void *)args->rlim); 1405 #endif 1406 1407 if (args->resource >= LINUX_RLIM_NLIMITS) 1408 return (EINVAL); 1409 1410 which = linux_to_bsd_resource[args->resource]; 1411 if (which == -1) 1412 return (EINVAL); 1413 1414 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1415 if (error) 1416 return (error); 1417 1418 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1419 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1420 return (kern_setrlimit(td, which, &bsd_rlim)); 1421 } 1422 1423 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1424 int 1425 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1426 { 1427 struct l_rlimit rlim; 1428 struct rlimit bsd_rlim; 1429 u_int which; 1430 1431 #ifdef DEBUG 1432 if (ldebug(old_getrlimit)) 1433 printf(ARGS(old_getrlimit, "%d, %p"), 1434 args->resource, (void *)args->rlim); 1435 #endif 1436 1437 if (args->resource >= LINUX_RLIM_NLIMITS) 1438 return (EINVAL); 1439 1440 which = linux_to_bsd_resource[args->resource]; 1441 if (which == -1) 1442 return (EINVAL); 1443 1444 lim_rlimit(td, which, &bsd_rlim); 1445 1446 #ifdef COMPAT_LINUX32 1447 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1448 if (rlim.rlim_cur == UINT_MAX) 1449 rlim.rlim_cur = INT_MAX; 1450 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1451 if (rlim.rlim_max == UINT_MAX) 1452 rlim.rlim_max = INT_MAX; 1453 #else 1454 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1455 if (rlim.rlim_cur == ULONG_MAX) 1456 rlim.rlim_cur = LONG_MAX; 1457 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1458 if (rlim.rlim_max == ULONG_MAX) 1459 rlim.rlim_max = LONG_MAX; 1460 #endif 1461 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1462 } 1463 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1464 1465 int 1466 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1467 { 1468 struct l_rlimit rlim; 1469 struct rlimit bsd_rlim; 1470 u_int which; 1471 1472 #ifdef DEBUG 1473 if (ldebug(getrlimit)) 1474 printf(ARGS(getrlimit, "%d, %p"), 1475 args->resource, (void *)args->rlim); 1476 #endif 1477 1478 if (args->resource >= LINUX_RLIM_NLIMITS) 1479 return (EINVAL); 1480 1481 which = linux_to_bsd_resource[args->resource]; 1482 if (which == -1) 1483 return (EINVAL); 1484 1485 lim_rlimit(td, which, &bsd_rlim); 1486 1487 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1488 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1489 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1490 } 1491 1492 int 1493 linux_sched_setscheduler(struct thread *td, 1494 struct linux_sched_setscheduler_args *args) 1495 { 1496 struct sched_param sched_param; 1497 struct thread *tdt; 1498 int error, policy; 1499 1500 #ifdef DEBUG 1501 if (ldebug(sched_setscheduler)) 1502 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1503 args->pid, args->policy, (const void *)args->param); 1504 #endif 1505 1506 switch (args->policy) { 1507 case LINUX_SCHED_OTHER: 1508 policy = SCHED_OTHER; 1509 break; 1510 case LINUX_SCHED_FIFO: 1511 policy = SCHED_FIFO; 1512 break; 1513 case LINUX_SCHED_RR: 1514 policy = SCHED_RR; 1515 break; 1516 default: 1517 return (EINVAL); 1518 } 1519 1520 error = copyin(args->param, &sched_param, sizeof(sched_param)); 1521 if (error) 1522 return (error); 1523 1524 tdt = linux_tdfind(td, args->pid, -1); 1525 if (tdt == NULL) 1526 return (ESRCH); 1527 1528 error = kern_sched_setscheduler(td, tdt, policy, &sched_param); 1529 PROC_UNLOCK(tdt->td_proc); 1530 return (error); 1531 } 1532 1533 int 1534 linux_sched_getscheduler(struct thread *td, 1535 struct linux_sched_getscheduler_args *args) 1536 { 1537 struct thread *tdt; 1538 int error, policy; 1539 1540 #ifdef DEBUG 1541 if (ldebug(sched_getscheduler)) 1542 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1543 #endif 1544 1545 tdt = linux_tdfind(td, args->pid, -1); 1546 if (tdt == NULL) 1547 return (ESRCH); 1548 1549 error = kern_sched_getscheduler(td, tdt, &policy); 1550 PROC_UNLOCK(tdt->td_proc); 1551 1552 switch (policy) { 1553 case SCHED_OTHER: 1554 td->td_retval[0] = LINUX_SCHED_OTHER; 1555 break; 1556 case SCHED_FIFO: 1557 td->td_retval[0] = LINUX_SCHED_FIFO; 1558 break; 1559 case SCHED_RR: 1560 td->td_retval[0] = LINUX_SCHED_RR; 1561 break; 1562 } 1563 return (error); 1564 } 1565 1566 int 1567 linux_sched_get_priority_max(struct thread *td, 1568 struct linux_sched_get_priority_max_args *args) 1569 { 1570 struct sched_get_priority_max_args bsd; 1571 1572 #ifdef DEBUG 1573 if (ldebug(sched_get_priority_max)) 1574 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1575 #endif 1576 1577 switch (args->policy) { 1578 case LINUX_SCHED_OTHER: 1579 bsd.policy = SCHED_OTHER; 1580 break; 1581 case LINUX_SCHED_FIFO: 1582 bsd.policy = SCHED_FIFO; 1583 break; 1584 case LINUX_SCHED_RR: 1585 bsd.policy = SCHED_RR; 1586 break; 1587 default: 1588 return (EINVAL); 1589 } 1590 return (sys_sched_get_priority_max(td, &bsd)); 1591 } 1592 1593 int 1594 linux_sched_get_priority_min(struct thread *td, 1595 struct linux_sched_get_priority_min_args *args) 1596 { 1597 struct sched_get_priority_min_args bsd; 1598 1599 #ifdef DEBUG 1600 if (ldebug(sched_get_priority_min)) 1601 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1602 #endif 1603 1604 switch (args->policy) { 1605 case LINUX_SCHED_OTHER: 1606 bsd.policy = SCHED_OTHER; 1607 break; 1608 case LINUX_SCHED_FIFO: 1609 bsd.policy = SCHED_FIFO; 1610 break; 1611 case LINUX_SCHED_RR: 1612 bsd.policy = SCHED_RR; 1613 break; 1614 default: 1615 return (EINVAL); 1616 } 1617 return (sys_sched_get_priority_min(td, &bsd)); 1618 } 1619 1620 #define REBOOT_CAD_ON 0x89abcdef 1621 #define REBOOT_CAD_OFF 0 1622 #define REBOOT_HALT 0xcdef0123 1623 #define REBOOT_RESTART 0x01234567 1624 #define REBOOT_RESTART2 0xA1B2C3D4 1625 #define REBOOT_POWEROFF 0x4321FEDC 1626 #define REBOOT_MAGIC1 0xfee1dead 1627 #define REBOOT_MAGIC2 0x28121969 1628 #define REBOOT_MAGIC2A 0x05121996 1629 #define REBOOT_MAGIC2B 0x16041998 1630 1631 int 1632 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1633 { 1634 struct reboot_args bsd_args; 1635 1636 #ifdef DEBUG 1637 if (ldebug(reboot)) 1638 printf(ARGS(reboot, "0x%x"), args->cmd); 1639 #endif 1640 1641 if (args->magic1 != REBOOT_MAGIC1) 1642 return (EINVAL); 1643 1644 switch (args->magic2) { 1645 case REBOOT_MAGIC2: 1646 case REBOOT_MAGIC2A: 1647 case REBOOT_MAGIC2B: 1648 break; 1649 default: 1650 return (EINVAL); 1651 } 1652 1653 switch (args->cmd) { 1654 case REBOOT_CAD_ON: 1655 case REBOOT_CAD_OFF: 1656 return (priv_check(td, PRIV_REBOOT)); 1657 case REBOOT_HALT: 1658 bsd_args.opt = RB_HALT; 1659 break; 1660 case REBOOT_RESTART: 1661 case REBOOT_RESTART2: 1662 bsd_args.opt = 0; 1663 break; 1664 case REBOOT_POWEROFF: 1665 bsd_args.opt = RB_POWEROFF; 1666 break; 1667 default: 1668 return (EINVAL); 1669 } 1670 return (sys_reboot(td, &bsd_args)); 1671 } 1672 1673 1674 /* 1675 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1676 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1677 * are assumed to be preserved. The following lightweight syscalls fixes 1678 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1679 * 1680 * linux_getpid() - MP SAFE 1681 * linux_getgid() - MP SAFE 1682 * linux_getuid() - MP SAFE 1683 */ 1684 1685 int 1686 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1687 { 1688 1689 #ifdef DEBUG 1690 if (ldebug(getpid)) 1691 printf(ARGS(getpid, "")); 1692 #endif 1693 td->td_retval[0] = td->td_proc->p_pid; 1694 1695 return (0); 1696 } 1697 1698 int 1699 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1700 { 1701 struct linux_emuldata *em; 1702 1703 #ifdef DEBUG 1704 if (ldebug(gettid)) 1705 printf(ARGS(gettid, "")); 1706 #endif 1707 1708 em = em_find(td); 1709 KASSERT(em != NULL, ("gettid: emuldata not found.\n")); 1710 1711 td->td_retval[0] = em->em_tid; 1712 1713 return (0); 1714 } 1715 1716 1717 int 1718 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1719 { 1720 1721 #ifdef DEBUG 1722 if (ldebug(getppid)) 1723 printf(ARGS(getppid, "")); 1724 #endif 1725 1726 PROC_LOCK(td->td_proc); 1727 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1728 PROC_UNLOCK(td->td_proc); 1729 return (0); 1730 } 1731 1732 int 1733 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1734 { 1735 1736 #ifdef DEBUG 1737 if (ldebug(getgid)) 1738 printf(ARGS(getgid, "")); 1739 #endif 1740 1741 td->td_retval[0] = td->td_ucred->cr_rgid; 1742 return (0); 1743 } 1744 1745 int 1746 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1747 { 1748 1749 #ifdef DEBUG 1750 if (ldebug(getuid)) 1751 printf(ARGS(getuid, "")); 1752 #endif 1753 1754 td->td_retval[0] = td->td_ucred->cr_ruid; 1755 return (0); 1756 } 1757 1758 1759 int 1760 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1761 { 1762 struct getsid_args bsd; 1763 1764 #ifdef DEBUG 1765 if (ldebug(getsid)) 1766 printf(ARGS(getsid, "%i"), args->pid); 1767 #endif 1768 1769 bsd.pid = args->pid; 1770 return (sys_getsid(td, &bsd)); 1771 } 1772 1773 int 1774 linux_nosys(struct thread *td, struct nosys_args *ignore) 1775 { 1776 1777 return (ENOSYS); 1778 } 1779 1780 int 1781 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1782 { 1783 struct getpriority_args bsd_args; 1784 int error; 1785 1786 #ifdef DEBUG 1787 if (ldebug(getpriority)) 1788 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1789 #endif 1790 1791 bsd_args.which = args->which; 1792 bsd_args.who = args->who; 1793 error = sys_getpriority(td, &bsd_args); 1794 td->td_retval[0] = 20 - td->td_retval[0]; 1795 return (error); 1796 } 1797 1798 int 1799 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1800 { 1801 int name[2]; 1802 1803 #ifdef DEBUG 1804 if (ldebug(sethostname)) 1805 printf(ARGS(sethostname, "*, %i"), args->len); 1806 #endif 1807 1808 name[0] = CTL_KERN; 1809 name[1] = KERN_HOSTNAME; 1810 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1811 args->len, 0, 0)); 1812 } 1813 1814 int 1815 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1816 { 1817 int name[2]; 1818 1819 #ifdef DEBUG 1820 if (ldebug(setdomainname)) 1821 printf(ARGS(setdomainname, "*, %i"), args->len); 1822 #endif 1823 1824 name[0] = CTL_KERN; 1825 name[1] = KERN_NISDOMAINNAME; 1826 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1827 args->len, 0, 0)); 1828 } 1829 1830 int 1831 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1832 { 1833 1834 #ifdef DEBUG 1835 if (ldebug(exit_group)) 1836 printf(ARGS(exit_group, "%i"), args->error_code); 1837 #endif 1838 1839 LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid, 1840 args->error_code); 1841 1842 /* 1843 * XXX: we should send a signal to the parent if 1844 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1845 * as it doesnt occur often. 1846 */ 1847 exit1(td, args->error_code, 0); 1848 /* NOTREACHED */ 1849 } 1850 1851 #define _LINUX_CAPABILITY_VERSION 0x19980330 1852 1853 struct l_user_cap_header { 1854 l_int version; 1855 l_int pid; 1856 }; 1857 1858 struct l_user_cap_data { 1859 l_int effective; 1860 l_int permitted; 1861 l_int inheritable; 1862 }; 1863 1864 int 1865 linux_capget(struct thread *td, struct linux_capget_args *args) 1866 { 1867 struct l_user_cap_header luch; 1868 struct l_user_cap_data lucd; 1869 int error; 1870 1871 if (args->hdrp == NULL) 1872 return (EFAULT); 1873 1874 error = copyin(args->hdrp, &luch, sizeof(luch)); 1875 if (error != 0) 1876 return (error); 1877 1878 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1879 luch.version = _LINUX_CAPABILITY_VERSION; 1880 error = copyout(&luch, args->hdrp, sizeof(luch)); 1881 if (error) 1882 return (error); 1883 return (EINVAL); 1884 } 1885 1886 if (luch.pid) 1887 return (EPERM); 1888 1889 if (args->datap) { 1890 /* 1891 * The current implementation doesn't support setting 1892 * a capability (it's essentially a stub) so indicate 1893 * that no capabilities are currently set or available 1894 * to request. 1895 */ 1896 bzero (&lucd, sizeof(lucd)); 1897 error = copyout(&lucd, args->datap, sizeof(lucd)); 1898 } 1899 1900 return (error); 1901 } 1902 1903 int 1904 linux_capset(struct thread *td, struct linux_capset_args *args) 1905 { 1906 struct l_user_cap_header luch; 1907 struct l_user_cap_data lucd; 1908 int error; 1909 1910 if (args->hdrp == NULL || args->datap == NULL) 1911 return (EFAULT); 1912 1913 error = copyin(args->hdrp, &luch, sizeof(luch)); 1914 if (error != 0) 1915 return (error); 1916 1917 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1918 luch.version = _LINUX_CAPABILITY_VERSION; 1919 error = copyout(&luch, args->hdrp, sizeof(luch)); 1920 if (error) 1921 return (error); 1922 return (EINVAL); 1923 } 1924 1925 if (luch.pid) 1926 return (EPERM); 1927 1928 error = copyin(args->datap, &lucd, sizeof(lucd)); 1929 if (error != 0) 1930 return (error); 1931 1932 /* We currently don't support setting any capabilities. */ 1933 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1934 linux_msg(td, 1935 "capset effective=0x%x, permitted=0x%x, " 1936 "inheritable=0x%x is not implemented", 1937 (int)lucd.effective, (int)lucd.permitted, 1938 (int)lucd.inheritable); 1939 return (EPERM); 1940 } 1941 1942 return (0); 1943 } 1944 1945 int 1946 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1947 { 1948 int error = 0, max_size; 1949 struct proc *p = td->td_proc; 1950 char comm[LINUX_MAX_COMM_LEN]; 1951 struct linux_emuldata *em; 1952 int pdeath_signal; 1953 1954 #ifdef DEBUG 1955 if (ldebug(prctl)) 1956 printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option, 1957 (uintmax_t)args->arg2, (uintmax_t)args->arg3, 1958 (uintmax_t)args->arg4, (uintmax_t)args->arg5); 1959 #endif 1960 1961 switch (args->option) { 1962 case LINUX_PR_SET_PDEATHSIG: 1963 if (!LINUX_SIG_VALID(args->arg2)) 1964 return (EINVAL); 1965 em = em_find(td); 1966 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1967 em->pdeath_signal = args->arg2; 1968 break; 1969 case LINUX_PR_GET_PDEATHSIG: 1970 em = em_find(td); 1971 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1972 pdeath_signal = em->pdeath_signal; 1973 error = copyout(&pdeath_signal, 1974 (void *)(register_t)args->arg2, 1975 sizeof(pdeath_signal)); 1976 break; 1977 case LINUX_PR_GET_KEEPCAPS: 1978 /* 1979 * Indicate that we always clear the effective and 1980 * permitted capability sets when the user id becomes 1981 * non-zero (actually the capability sets are simply 1982 * always zero in the current implementation). 1983 */ 1984 td->td_retval[0] = 0; 1985 break; 1986 case LINUX_PR_SET_KEEPCAPS: 1987 /* 1988 * Ignore requests to keep the effective and permitted 1989 * capability sets when the user id becomes non-zero. 1990 */ 1991 break; 1992 case LINUX_PR_SET_NAME: 1993 /* 1994 * To be on the safe side we need to make sure to not 1995 * overflow the size a linux program expects. We already 1996 * do this here in the copyin, so that we don't need to 1997 * check on copyout. 1998 */ 1999 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 2000 error = copyinstr((void *)(register_t)args->arg2, comm, 2001 max_size, NULL); 2002 2003 /* Linux silently truncates the name if it is too long. */ 2004 if (error == ENAMETOOLONG) { 2005 /* 2006 * XXX: copyinstr() isn't documented to populate the 2007 * array completely, so do a copyin() to be on the 2008 * safe side. This should be changed in case 2009 * copyinstr() is changed to guarantee this. 2010 */ 2011 error = copyin((void *)(register_t)args->arg2, comm, 2012 max_size - 1); 2013 comm[max_size - 1] = '\0'; 2014 } 2015 if (error) 2016 return (error); 2017 2018 PROC_LOCK(p); 2019 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 2020 PROC_UNLOCK(p); 2021 break; 2022 case LINUX_PR_GET_NAME: 2023 PROC_LOCK(p); 2024 strlcpy(comm, p->p_comm, sizeof(comm)); 2025 PROC_UNLOCK(p); 2026 error = copyout(comm, (void *)(register_t)args->arg2, 2027 strlen(comm) + 1); 2028 break; 2029 default: 2030 error = EINVAL; 2031 break; 2032 } 2033 2034 return (error); 2035 } 2036 2037 int 2038 linux_sched_setparam(struct thread *td, 2039 struct linux_sched_setparam_args *uap) 2040 { 2041 struct sched_param sched_param; 2042 struct thread *tdt; 2043 int error; 2044 2045 #ifdef DEBUG 2046 if (ldebug(sched_setparam)) 2047 printf(ARGS(sched_setparam, "%d, *"), uap->pid); 2048 #endif 2049 2050 error = copyin(uap->param, &sched_param, sizeof(sched_param)); 2051 if (error) 2052 return (error); 2053 2054 tdt = linux_tdfind(td, uap->pid, -1); 2055 if (tdt == NULL) 2056 return (ESRCH); 2057 2058 error = kern_sched_setparam(td, tdt, &sched_param); 2059 PROC_UNLOCK(tdt->td_proc); 2060 return (error); 2061 } 2062 2063 int 2064 linux_sched_getparam(struct thread *td, 2065 struct linux_sched_getparam_args *uap) 2066 { 2067 struct sched_param sched_param; 2068 struct thread *tdt; 2069 int error; 2070 2071 #ifdef DEBUG 2072 if (ldebug(sched_getparam)) 2073 printf(ARGS(sched_getparam, "%d, *"), uap->pid); 2074 #endif 2075 2076 tdt = linux_tdfind(td, uap->pid, -1); 2077 if (tdt == NULL) 2078 return (ESRCH); 2079 2080 error = kern_sched_getparam(td, tdt, &sched_param); 2081 PROC_UNLOCK(tdt->td_proc); 2082 if (error == 0) 2083 error = copyout(&sched_param, uap->param, 2084 sizeof(sched_param)); 2085 return (error); 2086 } 2087 2088 /* 2089 * Get affinity of a process. 2090 */ 2091 int 2092 linux_sched_getaffinity(struct thread *td, 2093 struct linux_sched_getaffinity_args *args) 2094 { 2095 int error; 2096 struct thread *tdt; 2097 struct cpuset_getaffinity_args cga; 2098 2099 #ifdef DEBUG 2100 if (ldebug(sched_getaffinity)) 2101 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 2102 args->len); 2103 #endif 2104 if (args->len < sizeof(cpuset_t)) 2105 return (EINVAL); 2106 2107 tdt = linux_tdfind(td, args->pid, -1); 2108 if (tdt == NULL) 2109 return (ESRCH); 2110 2111 PROC_UNLOCK(tdt->td_proc); 2112 cga.level = CPU_LEVEL_WHICH; 2113 cga.which = CPU_WHICH_TID; 2114 cga.id = tdt->td_tid; 2115 cga.cpusetsize = sizeof(cpuset_t); 2116 cga.mask = (cpuset_t *) args->user_mask_ptr; 2117 2118 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 2119 td->td_retval[0] = sizeof(cpuset_t); 2120 2121 return (error); 2122 } 2123 2124 /* 2125 * Set affinity of a process. 2126 */ 2127 int 2128 linux_sched_setaffinity(struct thread *td, 2129 struct linux_sched_setaffinity_args *args) 2130 { 2131 struct cpuset_setaffinity_args csa; 2132 struct thread *tdt; 2133 2134 #ifdef DEBUG 2135 if (ldebug(sched_setaffinity)) 2136 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 2137 args->len); 2138 #endif 2139 if (args->len < sizeof(cpuset_t)) 2140 return (EINVAL); 2141 2142 tdt = linux_tdfind(td, args->pid, -1); 2143 if (tdt == NULL) 2144 return (ESRCH); 2145 2146 PROC_UNLOCK(tdt->td_proc); 2147 csa.level = CPU_LEVEL_WHICH; 2148 csa.which = CPU_WHICH_TID; 2149 csa.id = tdt->td_tid; 2150 csa.cpusetsize = sizeof(cpuset_t); 2151 csa.mask = (cpuset_t *) args->user_mask_ptr; 2152 2153 return (sys_cpuset_setaffinity(td, &csa)); 2154 } 2155 2156 struct linux_rlimit64 { 2157 uint64_t rlim_cur; 2158 uint64_t rlim_max; 2159 }; 2160 2161 int 2162 linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args) 2163 { 2164 struct rlimit rlim, nrlim; 2165 struct linux_rlimit64 lrlim; 2166 struct proc *p; 2167 u_int which; 2168 int flags; 2169 int error; 2170 2171 #ifdef DEBUG 2172 if (ldebug(prlimit64)) 2173 printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid, 2174 args->resource, (void *)args->new, (void *)args->old); 2175 #endif 2176 2177 if (args->resource >= LINUX_RLIM_NLIMITS) 2178 return (EINVAL); 2179 2180 which = linux_to_bsd_resource[args->resource]; 2181 if (which == -1) 2182 return (EINVAL); 2183 2184 if (args->new != NULL) { 2185 /* 2186 * Note. Unlike FreeBSD where rlim is signed 64-bit Linux 2187 * rlim is unsigned 64-bit. FreeBSD treats negative limits 2188 * as INFINITY so we do not need a conversion even. 2189 */ 2190 error = copyin(args->new, &nrlim, sizeof(nrlim)); 2191 if (error != 0) 2192 return (error); 2193 } 2194 2195 flags = PGET_HOLD | PGET_NOTWEXIT; 2196 if (args->new != NULL) 2197 flags |= PGET_CANDEBUG; 2198 else 2199 flags |= PGET_CANSEE; 2200 error = pget(args->pid, flags, &p); 2201 if (error != 0) 2202 return (error); 2203 2204 if (args->old != NULL) { 2205 PROC_LOCK(p); 2206 lim_rlimit_proc(p, which, &rlim); 2207 PROC_UNLOCK(p); 2208 if (rlim.rlim_cur == RLIM_INFINITY) 2209 lrlim.rlim_cur = LINUX_RLIM_INFINITY; 2210 else 2211 lrlim.rlim_cur = rlim.rlim_cur; 2212 if (rlim.rlim_max == RLIM_INFINITY) 2213 lrlim.rlim_max = LINUX_RLIM_INFINITY; 2214 else 2215 lrlim.rlim_max = rlim.rlim_max; 2216 error = copyout(&lrlim, args->old, sizeof(lrlim)); 2217 if (error != 0) 2218 goto out; 2219 } 2220 2221 if (args->new != NULL) 2222 error = kern_proc_setrlimit(td, p, which, &nrlim); 2223 2224 out: 2225 PRELE(p); 2226 return (error); 2227 } 2228 2229 int 2230 linux_pselect6(struct thread *td, struct linux_pselect6_args *args) 2231 { 2232 struct timeval utv, tv0, tv1, *tvp; 2233 struct l_pselect6arg lpse6; 2234 struct l_timespec lts; 2235 struct timespec uts; 2236 l_sigset_t l_ss; 2237 sigset_t *ssp; 2238 sigset_t ss; 2239 int error; 2240 2241 ssp = NULL; 2242 if (args->sig != NULL) { 2243 error = copyin(args->sig, &lpse6, sizeof(lpse6)); 2244 if (error != 0) 2245 return (error); 2246 if (lpse6.ss_len != sizeof(l_ss)) 2247 return (EINVAL); 2248 if (lpse6.ss != 0) { 2249 error = copyin(PTRIN(lpse6.ss), &l_ss, 2250 sizeof(l_ss)); 2251 if (error != 0) 2252 return (error); 2253 linux_to_bsd_sigset(&l_ss, &ss); 2254 ssp = &ss; 2255 } 2256 } 2257 2258 /* 2259 * Currently glibc changes nanosecond number to microsecond. 2260 * This mean losing precision but for now it is hardly seen. 2261 */ 2262 if (args->tsp != NULL) { 2263 error = copyin(args->tsp, <s, sizeof(lts)); 2264 if (error != 0) 2265 return (error); 2266 error = linux_to_native_timespec(&uts, <s); 2267 if (error != 0) 2268 return (error); 2269 2270 TIMESPEC_TO_TIMEVAL(&utv, &uts); 2271 if (itimerfix(&utv)) 2272 return (EINVAL); 2273 2274 microtime(&tv0); 2275 tvp = &utv; 2276 } else 2277 tvp = NULL; 2278 2279 error = kern_pselect(td, args->nfds, args->readfds, args->writefds, 2280 args->exceptfds, tvp, ssp, LINUX_NFDBITS); 2281 2282 if (error == 0 && args->tsp != NULL) { 2283 if (td->td_retval[0] != 0) { 2284 /* 2285 * Compute how much time was left of the timeout, 2286 * by subtracting the current time and the time 2287 * before we started the call, and subtracting 2288 * that result from the user-supplied value. 2289 */ 2290 2291 microtime(&tv1); 2292 timevalsub(&tv1, &tv0); 2293 timevalsub(&utv, &tv1); 2294 if (utv.tv_sec < 0) 2295 timevalclear(&utv); 2296 } else 2297 timevalclear(&utv); 2298 2299 TIMEVAL_TO_TIMESPEC(&utv, &uts); 2300 2301 native_to_linux_timespec(<s, &uts); 2302 error = copyout(<s, args->tsp, sizeof(lts)); 2303 } 2304 2305 return (error); 2306 } 2307 2308 int 2309 linux_ppoll(struct thread *td, struct linux_ppoll_args *args) 2310 { 2311 struct timespec ts0, ts1; 2312 struct l_timespec lts; 2313 struct timespec uts, *tsp; 2314 l_sigset_t l_ss; 2315 sigset_t *ssp; 2316 sigset_t ss; 2317 int error; 2318 2319 if (args->sset != NULL) { 2320 if (args->ssize != sizeof(l_ss)) 2321 return (EINVAL); 2322 error = copyin(args->sset, &l_ss, sizeof(l_ss)); 2323 if (error) 2324 return (error); 2325 linux_to_bsd_sigset(&l_ss, &ss); 2326 ssp = &ss; 2327 } else 2328 ssp = NULL; 2329 if (args->tsp != NULL) { 2330 error = copyin(args->tsp, <s, sizeof(lts)); 2331 if (error) 2332 return (error); 2333 error = linux_to_native_timespec(&uts, <s); 2334 if (error != 0) 2335 return (error); 2336 2337 nanotime(&ts0); 2338 tsp = &uts; 2339 } else 2340 tsp = NULL; 2341 2342 error = kern_poll(td, args->fds, args->nfds, tsp, ssp); 2343 2344 if (error == 0 && args->tsp != NULL) { 2345 if (td->td_retval[0]) { 2346 nanotime(&ts1); 2347 timespecsub(&ts1, &ts0); 2348 timespecsub(&uts, &ts1); 2349 if (uts.tv_sec < 0) 2350 timespecclear(&uts); 2351 } else 2352 timespecclear(&uts); 2353 2354 native_to_linux_timespec(<s, &uts); 2355 error = copyout(<s, args->tsp, sizeof(lts)); 2356 } 2357 2358 return (error); 2359 } 2360 2361 #if defined(DEBUG) || defined(KTR) 2362 /* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */ 2363 2364 #ifdef COMPAT_LINUX32 2365 #define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL 2366 #else 2367 #define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL 2368 #endif 2369 2370 u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))]; 2371 2372 static int 2373 linux_debug(int syscall, int toggle, int global) 2374 { 2375 2376 if (global) { 2377 char c = toggle ? 0 : 0xff; 2378 2379 memset(linux_debug_map, c, sizeof(linux_debug_map)); 2380 return (0); 2381 } 2382 if (syscall < 0 || syscall >= L_MAXSYSCALL) 2383 return (EINVAL); 2384 if (toggle) 2385 clrbit(linux_debug_map, syscall); 2386 else 2387 setbit(linux_debug_map, syscall); 2388 return (0); 2389 } 2390 #undef L_MAXSYSCALL 2391 2392 /* 2393 * Usage: sysctl linux.debug=<syscall_nr>.<0/1> 2394 * 2395 * E.g.: sysctl linux.debug=21.0 2396 * 2397 * As a special case, syscall "all" will apply to all syscalls globally. 2398 */ 2399 #define LINUX_MAX_DEBUGSTR 16 2400 int 2401 linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 2402 { 2403 char value[LINUX_MAX_DEBUGSTR], *p; 2404 int error, sysc, toggle; 2405 int global = 0; 2406 2407 value[0] = '\0'; 2408 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 2409 if (error || req->newptr == NULL) 2410 return (error); 2411 for (p = value; *p != '\0' && *p != '.'; p++); 2412 if (*p == '\0') 2413 return (EINVAL); 2414 *p++ = '\0'; 2415 sysc = strtol(value, NULL, 0); 2416 toggle = strtol(p, NULL, 0); 2417 if (strcmp(value, "all") == 0) 2418 global = 1; 2419 error = linux_debug(sysc, toggle, global); 2420 return (error); 2421 } 2422 2423 #endif /* DEBUG || KTR */ 2424 2425 int 2426 linux_sched_rr_get_interval(struct thread *td, 2427 struct linux_sched_rr_get_interval_args *uap) 2428 { 2429 struct timespec ts; 2430 struct l_timespec lts; 2431 struct thread *tdt; 2432 int error; 2433 2434 /* 2435 * According to man in case the invalid pid specified 2436 * EINVAL should be returned. 2437 */ 2438 if (uap->pid < 0) 2439 return (EINVAL); 2440 2441 tdt = linux_tdfind(td, uap->pid, -1); 2442 if (tdt == NULL) 2443 return (ESRCH); 2444 2445 error = kern_sched_rr_get_interval_td(td, tdt, &ts); 2446 PROC_UNLOCK(tdt->td_proc); 2447 if (error != 0) 2448 return (error); 2449 native_to_linux_timespec(<s, &ts); 2450 return (copyout(<s, uap->interval, sizeof(lts))); 2451 } 2452 2453 /* 2454 * In case when the Linux thread is the initial thread in 2455 * the thread group thread id is equal to the process id. 2456 * Glibc depends on this magic (assert in pthread_getattr_np.c). 2457 */ 2458 struct thread * 2459 linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid) 2460 { 2461 struct linux_emuldata *em; 2462 struct thread *tdt; 2463 struct proc *p; 2464 2465 tdt = NULL; 2466 if (tid == 0 || tid == td->td_tid) { 2467 tdt = td; 2468 PROC_LOCK(tdt->td_proc); 2469 } else if (tid > PID_MAX) 2470 tdt = tdfind(tid, pid); 2471 else { 2472 /* 2473 * Initial thread where the tid equal to the pid. 2474 */ 2475 p = pfind(tid); 2476 if (p != NULL) { 2477 if (SV_PROC_ABI(p) != SV_ABI_LINUX) { 2478 /* 2479 * p is not a Linuxulator process. 2480 */ 2481 PROC_UNLOCK(p); 2482 return (NULL); 2483 } 2484 FOREACH_THREAD_IN_PROC(p, tdt) { 2485 em = em_find(tdt); 2486 if (tid == em->em_tid) 2487 return (tdt); 2488 } 2489 PROC_UNLOCK(p); 2490 } 2491 return (NULL); 2492 } 2493 2494 return (tdt); 2495 } 2496 2497 void 2498 linux_to_bsd_waitopts(int options, int *bsdopts) 2499 { 2500 2501 if (options & LINUX_WNOHANG) 2502 *bsdopts |= WNOHANG; 2503 if (options & LINUX_WUNTRACED) 2504 *bsdopts |= WUNTRACED; 2505 if (options & LINUX_WEXITED) 2506 *bsdopts |= WEXITED; 2507 if (options & LINUX_WCONTINUED) 2508 *bsdopts |= WCONTINUED; 2509 if (options & LINUX_WNOWAIT) 2510 *bsdopts |= WNOWAIT; 2511 2512 if (options & __WCLONE) 2513 *bsdopts |= WLINUXCLONE; 2514 } 2515