linux_misc.c revision 293896
1/*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 1994-1995 S�ren Schmidt 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer 11 * in this position and unchanged. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: releng/9.3/sys/compat/linux/linux_misc.c 293896 2016-01-14 09:11:26Z glebius $"); 32 33#include "opt_compat.h" 34#include "opt_kdtrace.h" 35 36#include <sys/param.h> 37#include <sys/blist.h> 38#include <sys/fcntl.h> 39#if defined(__i386__) 40#include <sys/imgact_aout.h> 41#endif 42#include <sys/jail.h> 43#include <sys/kernel.h> 44#include <sys/limits.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/mman.h> 48#include <sys/mount.h> 49#include <sys/mutex.h> 50#include <sys/namei.h> 51#include <sys/priv.h> 52#include <sys/proc.h> 53#include <sys/reboot.h> 54#include <sys/racct.h> 55#include <sys/resourcevar.h> 56#include <sys/sched.h> 57#include <sys/sdt.h> 58#include <sys/signalvar.h> 59#include <sys/stat.h> 60#include <sys/syscallsubr.h> 61#include <sys/sysctl.h> 62#include <sys/sysproto.h> 63#include <sys/systm.h> 64#include <sys/time.h> 65#include <sys/vmmeter.h> 66#include <sys/vnode.h> 67#include <sys/wait.h> 68#include <sys/cpuset.h> 69 70#include <security/mac/mac_framework.h> 71 72#include <vm/vm.h> 73#include <vm/pmap.h> 74#include <vm/vm_kern.h> 75#include <vm/vm_map.h> 76#include <vm/vm_extern.h> 77#include <vm/vm_object.h> 78#include <vm/swap_pager.h> 79 80#ifdef COMPAT_LINUX32 81#include <machine/../linux32/linux.h> 82#include <machine/../linux32/linux32_proto.h> 83#else 84#include <machine/../linux/linux.h> 85#include <machine/../linux/linux_proto.h> 86#endif 87 88#include <compat/linux/linux_dtrace.h> 89#include <compat/linux/linux_file.h> 90#include <compat/linux/linux_mib.h> 91#include <compat/linux/linux_signal.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/* DTrace init */ 98LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); 99 100/* Linuxulator-global DTrace probes */ 101LIN_SDT_PROBE_DECLARE(locks, emul_lock, locked); 102LIN_SDT_PROBE_DECLARE(locks, emul_lock, unlock); 103LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, locked); 104LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, unlock); 105LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, locked); 106LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, unlock); 107 108int stclohz; /* Statistics clock frequency */ 109 110static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 111 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 112 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 113 RLIMIT_MEMLOCK, RLIMIT_AS 114}; 115 116struct l_sysinfo { 117 l_long uptime; /* Seconds since boot */ 118 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 119#define LINUX_SYSINFO_LOADS_SCALE 65536 120 l_ulong totalram; /* Total usable main memory size */ 121 l_ulong freeram; /* Available memory size */ 122 l_ulong sharedram; /* Amount of shared memory */ 123 l_ulong bufferram; /* Memory used by buffers */ 124 l_ulong totalswap; /* Total swap space size */ 125 l_ulong freeswap; /* swap space still available */ 126 l_ushort procs; /* Number of current processes */ 127 l_ushort pads; 128 l_ulong totalbig; 129 l_ulong freebig; 130 l_uint mem_unit; 131 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 132}; 133int 134linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 135{ 136 struct l_sysinfo sysinfo; 137 vm_object_t object; 138 int i, j; 139 struct timespec ts; 140 141 getnanouptime(&ts); 142 if (ts.tv_nsec != 0) 143 ts.tv_sec++; 144 sysinfo.uptime = ts.tv_sec; 145 146 /* Use the information from the mib to get our load averages */ 147 for (i = 0; i < 3; i++) 148 sysinfo.loads[i] = averunnable.ldavg[i] * 149 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 150 151 sysinfo.totalram = physmem * PAGE_SIZE; 152 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 153 154 sysinfo.sharedram = 0; 155 mtx_lock(&vm_object_list_mtx); 156 TAILQ_FOREACH(object, &vm_object_list, object_list) 157 if (object->shadow_count > 1) 158 sysinfo.sharedram += object->resident_page_count; 159 mtx_unlock(&vm_object_list_mtx); 160 161 sysinfo.sharedram *= PAGE_SIZE; 162 sysinfo.bufferram = 0; 163 164 swap_pager_status(&i, &j); 165 sysinfo.totalswap = i * PAGE_SIZE; 166 sysinfo.freeswap = (i - j) * PAGE_SIZE; 167 168 sysinfo.procs = nprocs; 169 170 /* The following are only present in newer Linux kernels. */ 171 sysinfo.totalbig = 0; 172 sysinfo.freebig = 0; 173 sysinfo.mem_unit = 1; 174 175 return (copyout(&sysinfo, args->info, sizeof(sysinfo))); 176} 177 178int 179linux_alarm(struct thread *td, struct linux_alarm_args *args) 180{ 181 struct itimerval it, old_it; 182 u_int secs; 183 int error; 184 185#ifdef DEBUG 186 if (ldebug(alarm)) 187 printf(ARGS(alarm, "%u"), args->secs); 188#endif 189 190 secs = args->secs; 191 192 if (secs > INT_MAX) 193 secs = INT_MAX; 194 195 it.it_value.tv_sec = (long) secs; 196 it.it_value.tv_usec = 0; 197 it.it_interval.tv_sec = 0; 198 it.it_interval.tv_usec = 0; 199 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 200 if (error) 201 return (error); 202 if (timevalisset(&old_it.it_value)) { 203 if (old_it.it_value.tv_usec != 0) 204 old_it.it_value.tv_sec++; 205 td->td_retval[0] = old_it.it_value.tv_sec; 206 } 207 return (0); 208} 209 210int 211linux_brk(struct thread *td, struct linux_brk_args *args) 212{ 213 struct vmspace *vm = td->td_proc->p_vmspace; 214 vm_offset_t new, old; 215 struct obreak_args /* { 216 char * nsize; 217 } */ tmp; 218 219#ifdef DEBUG 220 if (ldebug(brk)) 221 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 222#endif 223 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 224 new = (vm_offset_t)args->dsend; 225 tmp.nsize = (char *)new; 226 if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp)) 227 td->td_retval[0] = (long)new; 228 else 229 td->td_retval[0] = (long)old; 230 231 return (0); 232} 233 234#if defined(__i386__) 235/* XXX: what about amd64/linux32? */ 236 237int 238linux_uselib(struct thread *td, struct linux_uselib_args *args) 239{ 240 struct nameidata ni; 241 struct vnode *vp; 242 struct exec *a_out; 243 struct vattr attr; 244 vm_offset_t vmaddr; 245 unsigned long file_offset; 246 unsigned long bss_size; 247 char *library; 248 ssize_t aresid; 249 int error, locked, vfslocked, writecount; 250 251 LCONVPATHEXIST(td, args->library, &library); 252 253#ifdef DEBUG 254 if (ldebug(uselib)) 255 printf(ARGS(uselib, "%s"), library); 256#endif 257 258 a_out = NULL; 259 vfslocked = 0; 260 locked = 0; 261 vp = NULL; 262 263 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1, 264 UIO_SYSSPACE, library, td); 265 error = namei(&ni); 266 LFREEPATH(library); 267 if (error) 268 goto cleanup; 269 270 vp = ni.ni_vp; 271 vfslocked = NDHASGIANT(&ni); 272 NDFREE(&ni, NDF_ONLY_PNBUF); 273 274 /* 275 * From here on down, we have a locked vnode that must be unlocked. 276 * XXX: The code below largely duplicates exec_check_permissions(). 277 */ 278 locked = 1; 279 280 /* Writable? */ 281 error = VOP_GET_WRITECOUNT(vp, &writecount); 282 if (error != 0) 283 goto cleanup; 284 if (writecount != 0) { 285 error = ETXTBSY; 286 goto cleanup; 287 } 288 289 /* Executable? */ 290 error = VOP_GETATTR(vp, &attr, td->td_ucred); 291 if (error) 292 goto cleanup; 293 294 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 295 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 296 /* EACCESS is what exec(2) returns. */ 297 error = ENOEXEC; 298 goto cleanup; 299 } 300 301 /* Sensible size? */ 302 if (attr.va_size == 0) { 303 error = ENOEXEC; 304 goto cleanup; 305 } 306 307 /* Can we access it? */ 308 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 309 if (error) 310 goto cleanup; 311 312 /* 313 * XXX: This should use vn_open() so that it is properly authorized, 314 * and to reduce code redundancy all over the place here. 315 * XXX: Not really, it duplicates far more of exec_check_permissions() 316 * than vn_open(). 317 */ 318#ifdef MAC 319 error = mac_vnode_check_open(td->td_ucred, vp, VREAD); 320 if (error) 321 goto cleanup; 322#endif 323 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 324 if (error) 325 goto cleanup; 326 327 /* Pull in executable header into exec_map */ 328 error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE, 329 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 330 if (error) 331 goto cleanup; 332 333 /* Is it a Linux binary ? */ 334 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 335 error = ENOEXEC; 336 goto cleanup; 337 } 338 339 /* 340 * While we are here, we should REALLY do some more checks 341 */ 342 343 /* Set file/virtual offset based on a.out variant. */ 344 switch ((int)(a_out->a_magic & 0xffff)) { 345 case 0413: /* ZMAGIC */ 346 file_offset = 1024; 347 break; 348 case 0314: /* QMAGIC */ 349 file_offset = 0; 350 break; 351 default: 352 error = ENOEXEC; 353 goto cleanup; 354 } 355 356 bss_size = round_page(a_out->a_bss); 357 358 /* Check various fields in header for validity/bounds. */ 359 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 360 error = ENOEXEC; 361 goto cleanup; 362 } 363 364 /* text + data can't exceed file size */ 365 if (a_out->a_data + a_out->a_text > attr.va_size) { 366 error = EFAULT; 367 goto cleanup; 368 } 369 370 /* 371 * text/data/bss must not exceed limits 372 * XXX - this is not complete. it should check current usage PLUS 373 * the resources needed by this library. 374 */ 375 PROC_LOCK(td->td_proc); 376 if (a_out->a_text > maxtsiz || 377 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) || 378 racct_set(td->td_proc, RACCT_DATA, a_out->a_data + 379 bss_size) != 0) { 380 PROC_UNLOCK(td->td_proc); 381 error = ENOMEM; 382 goto cleanup; 383 } 384 PROC_UNLOCK(td->td_proc); 385 386 /* 387 * Prevent more writers. 388 * XXX: Note that if any of the VM operations fail below we don't 389 * clear this flag. 390 */ 391 VOP_SET_TEXT(vp); 392 393 /* 394 * Lock no longer needed 395 */ 396 locked = 0; 397 VOP_UNLOCK(vp, 0); 398 VFS_UNLOCK_GIANT(vfslocked); 399 400 /* 401 * Check if file_offset page aligned. Currently we cannot handle 402 * misalinged file offsets, and so we read in the entire image 403 * (what a waste). 404 */ 405 if (file_offset & PAGE_MASK) { 406#ifdef DEBUG 407 printf("uselib: Non page aligned binary %lu\n", file_offset); 408#endif 409 /* Map text+data read/write/execute */ 410 411 /* a_entry is the load address and is page aligned */ 412 vmaddr = trunc_page(a_out->a_entry); 413 414 /* get anon user mapping, read+write+execute */ 415 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 416 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 417 VM_PROT_ALL, 0); 418 if (error) 419 goto cleanup; 420 421 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset, 422 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0, 423 td->td_ucred, NOCRED, &aresid, td); 424 if (error != 0) 425 goto cleanup; 426 if (aresid != 0) { 427 error = ENOEXEC; 428 goto cleanup; 429 } 430 } else { 431#ifdef DEBUG 432 printf("uselib: Page aligned binary %lu\n", file_offset); 433#endif 434 /* 435 * for QMAGIC, a_entry is 20 bytes beyond the load address 436 * to skip the executable header 437 */ 438 vmaddr = trunc_page(a_out->a_entry); 439 440 /* 441 * Map it all into the process's space as a single 442 * copy-on-write "data" segment. 443 */ 444 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 445 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 446 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 447 if (error) 448 goto cleanup; 449 } 450#ifdef DEBUG 451 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 452 ((long *)vmaddr)[1]); 453#endif 454 if (bss_size != 0) { 455 /* Calculate BSS start address */ 456 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 457 a_out->a_data; 458 459 /* allocate some 'anon' space */ 460 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 461 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 462 if (error) 463 goto cleanup; 464 } 465 466cleanup: 467 /* Unlock vnode if needed */ 468 if (locked) { 469 VOP_UNLOCK(vp, 0); 470 VFS_UNLOCK_GIANT(vfslocked); 471 } 472 473 /* Release the temporary mapping. */ 474 if (a_out) 475 kmem_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE); 476 477 return (error); 478} 479 480#endif /* __i386__ */ 481 482int 483linux_select(struct thread *td, struct linux_select_args *args) 484{ 485 l_timeval ltv; 486 struct timeval tv0, tv1, utv, *tvp; 487 int error; 488 489#ifdef DEBUG 490 if (ldebug(select)) 491 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 492 (void *)args->readfds, (void *)args->writefds, 493 (void *)args->exceptfds, (void *)args->timeout); 494#endif 495 496 /* 497 * Store current time for computation of the amount of 498 * time left. 499 */ 500 if (args->timeout) { 501 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 502 goto select_out; 503 utv.tv_sec = ltv.tv_sec; 504 utv.tv_usec = ltv.tv_usec; 505#ifdef DEBUG 506 if (ldebug(select)) 507 printf(LMSG("incoming timeout (%jd/%ld)"), 508 (intmax_t)utv.tv_sec, utv.tv_usec); 509#endif 510 511 if (itimerfix(&utv)) { 512 /* 513 * The timeval was invalid. Convert it to something 514 * valid that will act as it does under Linux. 515 */ 516 utv.tv_sec += utv.tv_usec / 1000000; 517 utv.tv_usec %= 1000000; 518 if (utv.tv_usec < 0) { 519 utv.tv_sec -= 1; 520 utv.tv_usec += 1000000; 521 } 522 if (utv.tv_sec < 0) 523 timevalclear(&utv); 524 } 525 microtime(&tv0); 526 tvp = &utv; 527 } else 528 tvp = NULL; 529 530 error = kern_select(td, args->nfds, args->readfds, args->writefds, 531 args->exceptfds, tvp, sizeof(l_int) * 8); 532 533#ifdef DEBUG 534 if (ldebug(select)) 535 printf(LMSG("real select returns %d"), error); 536#endif 537 if (error) 538 goto select_out; 539 540 if (args->timeout) { 541 if (td->td_retval[0]) { 542 /* 543 * Compute how much time was left of the timeout, 544 * by subtracting the current time and the time 545 * before we started the call, and subtracting 546 * that result from the user-supplied value. 547 */ 548 microtime(&tv1); 549 timevalsub(&tv1, &tv0); 550 timevalsub(&utv, &tv1); 551 if (utv.tv_sec < 0) 552 timevalclear(&utv); 553 } else 554 timevalclear(&utv); 555#ifdef DEBUG 556 if (ldebug(select)) 557 printf(LMSG("outgoing timeout (%jd/%ld)"), 558 (intmax_t)utv.tv_sec, utv.tv_usec); 559#endif 560 ltv.tv_sec = utv.tv_sec; 561 ltv.tv_usec = utv.tv_usec; 562 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 563 goto select_out; 564 } 565 566select_out: 567#ifdef DEBUG 568 if (ldebug(select)) 569 printf(LMSG("select_out -> %d"), error); 570#endif 571 return (error); 572} 573 574int 575linux_mremap(struct thread *td, struct linux_mremap_args *args) 576{ 577 struct munmap_args /* { 578 void *addr; 579 size_t len; 580 } */ bsd_args; 581 int error = 0; 582 583#ifdef DEBUG 584 if (ldebug(mremap)) 585 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 586 (void *)(uintptr_t)args->addr, 587 (unsigned long)args->old_len, 588 (unsigned long)args->new_len, 589 (unsigned long)args->flags); 590#endif 591 592 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { 593 td->td_retval[0] = 0; 594 return (EINVAL); 595 } 596 597 /* 598 * Check for the page alignment. 599 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. 600 */ 601 if (args->addr & PAGE_MASK) { 602 td->td_retval[0] = 0; 603 return (EINVAL); 604 } 605 606 args->new_len = round_page(args->new_len); 607 args->old_len = round_page(args->old_len); 608 609 if (args->new_len > args->old_len) { 610 td->td_retval[0] = 0; 611 return (ENOMEM); 612 } 613 614 if (args->new_len < args->old_len) { 615 bsd_args.addr = 616 (caddr_t)((uintptr_t)args->addr + args->new_len); 617 bsd_args.len = args->old_len - args->new_len; 618 error = sys_munmap(td, &bsd_args); 619 } 620 621 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 622 return (error); 623} 624 625#define LINUX_MS_ASYNC 0x0001 626#define LINUX_MS_INVALIDATE 0x0002 627#define LINUX_MS_SYNC 0x0004 628 629int 630linux_msync(struct thread *td, struct linux_msync_args *args) 631{ 632 struct msync_args bsd_args; 633 634 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 635 bsd_args.len = (uintptr_t)args->len; 636 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 637 638 return (sys_msync(td, &bsd_args)); 639} 640 641int 642linux_time(struct thread *td, struct linux_time_args *args) 643{ 644 struct timeval tv; 645 l_time_t tm; 646 int error; 647 648#ifdef DEBUG 649 if (ldebug(time)) 650 printf(ARGS(time, "*")); 651#endif 652 653 microtime(&tv); 654 tm = tv.tv_sec; 655 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 656 return (error); 657 td->td_retval[0] = tm; 658 return (0); 659} 660 661struct l_times_argv { 662 l_clock_t tms_utime; 663 l_clock_t tms_stime; 664 l_clock_t tms_cutime; 665 l_clock_t tms_cstime; 666}; 667 668 669/* 670 * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. 671 * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK 672 * auxiliary vector entry. 673 */ 674#define CLK_TCK 100 675 676#define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 677#define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) 678 679#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ 680 CONVNTCK(r) : CONVOTCK(r)) 681 682int 683linux_times(struct thread *td, struct linux_times_args *args) 684{ 685 struct timeval tv, utime, stime, cutime, cstime; 686 struct l_times_argv tms; 687 struct proc *p; 688 int error; 689 690#ifdef DEBUG 691 if (ldebug(times)) 692 printf(ARGS(times, "*")); 693#endif 694 695 if (args->buf != NULL) { 696 p = td->td_proc; 697 PROC_LOCK(p); 698 PROC_SLOCK(p); 699 calcru(p, &utime, &stime); 700 PROC_SUNLOCK(p); 701 calccru(p, &cutime, &cstime); 702 PROC_UNLOCK(p); 703 704 tms.tms_utime = CONVTCK(utime); 705 tms.tms_stime = CONVTCK(stime); 706 707 tms.tms_cutime = CONVTCK(cutime); 708 tms.tms_cstime = CONVTCK(cstime); 709 710 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 711 return (error); 712 } 713 714 microuptime(&tv); 715 td->td_retval[0] = (int)CONVTCK(tv); 716 return (0); 717} 718 719int 720linux_newuname(struct thread *td, struct linux_newuname_args *args) 721{ 722 struct l_new_utsname utsname; 723 char osname[LINUX_MAX_UTSNAME]; 724 char osrelease[LINUX_MAX_UTSNAME]; 725 char *p; 726 727#ifdef DEBUG 728 if (ldebug(newuname)) 729 printf(ARGS(newuname, "*")); 730#endif 731 732 linux_get_osname(td, osname); 733 linux_get_osrelease(td, osrelease); 734 735 bzero(&utsname, sizeof(utsname)); 736 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 737 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 738 getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); 739 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 740 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 741 for (p = utsname.version; *p != '\0'; ++p) 742 if (*p == '\n') { 743 *p = '\0'; 744 break; 745 } 746 strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME); 747 748 return (copyout(&utsname, args->buf, sizeof(utsname))); 749} 750 751#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 752struct l_utimbuf { 753 l_time_t l_actime; 754 l_time_t l_modtime; 755}; 756 757int 758linux_utime(struct thread *td, struct linux_utime_args *args) 759{ 760 struct timeval tv[2], *tvp; 761 struct l_utimbuf lut; 762 char *fname; 763 int error; 764 765 LCONVPATHEXIST(td, args->fname, &fname); 766 767#ifdef DEBUG 768 if (ldebug(utime)) 769 printf(ARGS(utime, "%s, *"), fname); 770#endif 771 772 if (args->times) { 773 if ((error = copyin(args->times, &lut, sizeof lut))) { 774 LFREEPATH(fname); 775 return (error); 776 } 777 tv[0].tv_sec = lut.l_actime; 778 tv[0].tv_usec = 0; 779 tv[1].tv_sec = lut.l_modtime; 780 tv[1].tv_usec = 0; 781 tvp = tv; 782 } else 783 tvp = NULL; 784 785 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 786 LFREEPATH(fname); 787 return (error); 788} 789 790int 791linux_utimes(struct thread *td, struct linux_utimes_args *args) 792{ 793 l_timeval ltv[2]; 794 struct timeval tv[2], *tvp = NULL; 795 char *fname; 796 int error; 797 798 LCONVPATHEXIST(td, args->fname, &fname); 799 800#ifdef DEBUG 801 if (ldebug(utimes)) 802 printf(ARGS(utimes, "%s, *"), fname); 803#endif 804 805 if (args->tptr != NULL) { 806 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 807 LFREEPATH(fname); 808 return (error); 809 } 810 tv[0].tv_sec = ltv[0].tv_sec; 811 tv[0].tv_usec = ltv[0].tv_usec; 812 tv[1].tv_sec = ltv[1].tv_sec; 813 tv[1].tv_usec = ltv[1].tv_usec; 814 tvp = tv; 815 } 816 817 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 818 LFREEPATH(fname); 819 return (error); 820} 821 822int 823linux_futimesat(struct thread *td, struct linux_futimesat_args *args) 824{ 825 l_timeval ltv[2]; 826 struct timeval tv[2], *tvp = NULL; 827 char *fname; 828 int error, dfd; 829 830 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 831 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); 832 833#ifdef DEBUG 834 if (ldebug(futimesat)) 835 printf(ARGS(futimesat, "%s, *"), fname); 836#endif 837 838 if (args->utimes != NULL) { 839 if ((error = copyin(args->utimes, ltv, sizeof ltv))) { 840 LFREEPATH(fname); 841 return (error); 842 } 843 tv[0].tv_sec = ltv[0].tv_sec; 844 tv[0].tv_usec = ltv[0].tv_usec; 845 tv[1].tv_sec = ltv[1].tv_sec; 846 tv[1].tv_usec = ltv[1].tv_usec; 847 tvp = tv; 848 } 849 850 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 851 LFREEPATH(fname); 852 return (error); 853} 854#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 855 856int 857linux_common_wait(struct thread *td, int pid, int *status, 858 int options, struct rusage *ru) 859{ 860 int error, tmpstat; 861 862 error = kern_wait(td, pid, &tmpstat, options, ru); 863 if (error) 864 return (error); 865 866 if (status) { 867 tmpstat &= 0xffff; 868 if (WIFSIGNALED(tmpstat)) 869 tmpstat = (tmpstat & 0xffffff80) | 870 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 871 else if (WIFSTOPPED(tmpstat)) 872 tmpstat = (tmpstat & 0xffff00ff) | 873 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 874 error = copyout(&tmpstat, status, sizeof(int)); 875 } 876 877 return (error); 878} 879 880int 881linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 882{ 883 int options; 884 885#ifdef DEBUG 886 if (ldebug(waitpid)) 887 printf(ARGS(waitpid, "%d, %p, %d"), 888 args->pid, (void *)args->status, args->options); 889#endif 890 /* 891 * this is necessary because the test in kern_wait doesn't work 892 * because we mess with the options here 893 */ 894 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) 895 return (EINVAL); 896 897 options = (args->options & (WNOHANG | WUNTRACED)); 898 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 899 if (args->options & __WCLONE) 900 options |= WLINUXCLONE; 901 902 return (linux_common_wait(td, args->pid, args->status, options, NULL)); 903} 904 905 906int 907linux_mknod(struct thread *td, struct linux_mknod_args *args) 908{ 909 char *path; 910 int error; 911 912 LCONVPATHCREAT(td, args->path, &path); 913 914#ifdef DEBUG 915 if (ldebug(mknod)) 916 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 917#endif 918 919 switch (args->mode & S_IFMT) { 920 case S_IFIFO: 921 case S_IFSOCK: 922 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 923 break; 924 925 case S_IFCHR: 926 case S_IFBLK: 927 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 928 args->dev); 929 break; 930 931 case S_IFDIR: 932 error = EPERM; 933 break; 934 935 case 0: 936 args->mode |= S_IFREG; 937 /* FALLTHROUGH */ 938 case S_IFREG: 939 error = kern_open(td, path, UIO_SYSSPACE, 940 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 941 if (error == 0) 942 kern_close(td, td->td_retval[0]); 943 break; 944 945 default: 946 error = EINVAL; 947 break; 948 } 949 LFREEPATH(path); 950 return (error); 951} 952 953int 954linux_mknodat(struct thread *td, struct linux_mknodat_args *args) 955{ 956 char *path; 957 int error, dfd; 958 959 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 960 LCONVPATHCREAT_AT(td, args->filename, &path, dfd); 961 962#ifdef DEBUG 963 if (ldebug(mknodat)) 964 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); 965#endif 966 967 switch (args->mode & S_IFMT) { 968 case S_IFIFO: 969 case S_IFSOCK: 970 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); 971 break; 972 973 case S_IFCHR: 974 case S_IFBLK: 975 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, 976 args->dev); 977 break; 978 979 case S_IFDIR: 980 error = EPERM; 981 break; 982 983 case 0: 984 args->mode |= S_IFREG; 985 /* FALLTHROUGH */ 986 case S_IFREG: 987 error = kern_openat(td, dfd, path, UIO_SYSSPACE, 988 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 989 if (error == 0) 990 kern_close(td, td->td_retval[0]); 991 break; 992 993 default: 994 error = EINVAL; 995 break; 996 } 997 LFREEPATH(path); 998 return (error); 999} 1000 1001/* 1002 * UGH! This is just about the dumbest idea I've ever heard!! 1003 */ 1004int 1005linux_personality(struct thread *td, struct linux_personality_args *args) 1006{ 1007#ifdef DEBUG 1008 if (ldebug(personality)) 1009 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 1010#endif 1011 if (args->per != 0) 1012 return (EINVAL); 1013 1014 /* Yes Jim, it's still a Linux... */ 1015 td->td_retval[0] = 0; 1016 return (0); 1017} 1018 1019struct l_itimerval { 1020 l_timeval it_interval; 1021 l_timeval it_value; 1022}; 1023 1024#define B2L_ITIMERVAL(bip, lip) \ 1025 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 1026 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 1027 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 1028 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 1029 1030int 1031linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 1032{ 1033 int error; 1034 struct l_itimerval ls; 1035 struct itimerval aitv, oitv; 1036 1037#ifdef DEBUG 1038 if (ldebug(setitimer)) 1039 printf(ARGS(setitimer, "%p, %p"), 1040 (void *)uap->itv, (void *)uap->oitv); 1041#endif 1042 1043 if (uap->itv == NULL) { 1044 uap->itv = uap->oitv; 1045 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1046 } 1047 1048 error = copyin(uap->itv, &ls, sizeof(ls)); 1049 if (error != 0) 1050 return (error); 1051 B2L_ITIMERVAL(&aitv, &ls); 1052#ifdef DEBUG 1053 if (ldebug(setitimer)) { 1054 printf("setitimer: value: sec: %jd, usec: %ld\n", 1055 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1056 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1057 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1058 } 1059#endif 1060 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1061 if (error != 0 || uap->oitv == NULL) 1062 return (error); 1063 B2L_ITIMERVAL(&ls, &oitv); 1064 1065 return (copyout(&ls, uap->oitv, sizeof(ls))); 1066} 1067 1068int 1069linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1070{ 1071 int error; 1072 struct l_itimerval ls; 1073 struct itimerval aitv; 1074 1075#ifdef DEBUG 1076 if (ldebug(getitimer)) 1077 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1078#endif 1079 error = kern_getitimer(td, uap->which, &aitv); 1080 if (error != 0) 1081 return (error); 1082 B2L_ITIMERVAL(&ls, &aitv); 1083 return (copyout(&ls, uap->itv, sizeof(ls))); 1084} 1085 1086int 1087linux_nice(struct thread *td, struct linux_nice_args *args) 1088{ 1089 struct setpriority_args bsd_args; 1090 1091 bsd_args.which = PRIO_PROCESS; 1092 bsd_args.who = 0; /* current process */ 1093 bsd_args.prio = args->inc; 1094 return (sys_setpriority(td, &bsd_args)); 1095} 1096 1097int 1098linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1099{ 1100 struct ucred *newcred, *oldcred; 1101 l_gid_t *linux_gidset; 1102 gid_t *bsd_gidset; 1103 int ngrp, error; 1104 struct proc *p; 1105 1106 ngrp = args->gidsetsize; 1107 if (ngrp < 0 || ngrp >= ngroups_max + 1) 1108 return (EINVAL); 1109 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK); 1110 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1111 if (error) 1112 goto out; 1113 newcred = crget(); 1114 crextend(newcred, ngrp + 1); 1115 p = td->td_proc; 1116 PROC_LOCK(p); 1117 oldcred = p->p_ucred; 1118 crcopy(newcred, oldcred); 1119 1120 /* 1121 * cr_groups[0] holds egid. Setting the whole set from 1122 * the supplied set will cause egid to be changed too. 1123 * Keep cr_groups[0] unchanged to prevent that. 1124 */ 1125 1126 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { 1127 PROC_UNLOCK(p); 1128 crfree(newcred); 1129 goto out; 1130 } 1131 1132 if (ngrp > 0) { 1133 newcred->cr_ngroups = ngrp + 1; 1134 1135 bsd_gidset = newcred->cr_groups; 1136 ngrp--; 1137 while (ngrp >= 0) { 1138 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1139 ngrp--; 1140 } 1141 } else 1142 newcred->cr_ngroups = 1; 1143 1144 setsugid(p); 1145 p->p_ucred = newcred; 1146 PROC_UNLOCK(p); 1147 crfree(oldcred); 1148 error = 0; 1149out: 1150 free(linux_gidset, M_TEMP); 1151 return (error); 1152} 1153 1154int 1155linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1156{ 1157 struct ucred *cred; 1158 l_gid_t *linux_gidset; 1159 gid_t *bsd_gidset; 1160 int bsd_gidsetsz, ngrp, error; 1161 1162 cred = td->td_ucred; 1163 bsd_gidset = cred->cr_groups; 1164 bsd_gidsetsz = cred->cr_ngroups - 1; 1165 1166 /* 1167 * cr_groups[0] holds egid. Returning the whole set 1168 * here will cause a duplicate. Exclude cr_groups[0] 1169 * to prevent that. 1170 */ 1171 1172 if ((ngrp = args->gidsetsize) == 0) { 1173 td->td_retval[0] = bsd_gidsetsz; 1174 return (0); 1175 } 1176 1177 if (ngrp < bsd_gidsetsz) 1178 return (EINVAL); 1179 1180 ngrp = 0; 1181 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), 1182 M_TEMP, M_WAITOK); 1183 while (ngrp < bsd_gidsetsz) { 1184 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1185 ngrp++; 1186 } 1187 1188 error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); 1189 free(linux_gidset, M_TEMP); 1190 if (error) 1191 return (error); 1192 1193 td->td_retval[0] = ngrp; 1194 return (0); 1195} 1196 1197int 1198linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1199{ 1200 struct rlimit bsd_rlim; 1201 struct l_rlimit rlim; 1202 u_int which; 1203 int error; 1204 1205#ifdef DEBUG 1206 if (ldebug(setrlimit)) 1207 printf(ARGS(setrlimit, "%d, %p"), 1208 args->resource, (void *)args->rlim); 1209#endif 1210 1211 if (args->resource >= LINUX_RLIM_NLIMITS) 1212 return (EINVAL); 1213 1214 which = linux_to_bsd_resource[args->resource]; 1215 if (which == -1) 1216 return (EINVAL); 1217 1218 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1219 if (error) 1220 return (error); 1221 1222 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1223 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1224 return (kern_setrlimit(td, which, &bsd_rlim)); 1225} 1226 1227int 1228linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1229{ 1230 struct l_rlimit rlim; 1231 struct proc *p = td->td_proc; 1232 struct rlimit bsd_rlim; 1233 u_int which; 1234 1235#ifdef DEBUG 1236 if (ldebug(old_getrlimit)) 1237 printf(ARGS(old_getrlimit, "%d, %p"), 1238 args->resource, (void *)args->rlim); 1239#endif 1240 1241 if (args->resource >= LINUX_RLIM_NLIMITS) 1242 return (EINVAL); 1243 1244 which = linux_to_bsd_resource[args->resource]; 1245 if (which == -1) 1246 return (EINVAL); 1247 1248 PROC_LOCK(p); 1249 lim_rlimit(p, which, &bsd_rlim); 1250 PROC_UNLOCK(p); 1251 1252#ifdef COMPAT_LINUX32 1253 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1254 if (rlim.rlim_cur == UINT_MAX) 1255 rlim.rlim_cur = INT_MAX; 1256 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1257 if (rlim.rlim_max == UINT_MAX) 1258 rlim.rlim_max = INT_MAX; 1259#else 1260 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1261 if (rlim.rlim_cur == ULONG_MAX) 1262 rlim.rlim_cur = LONG_MAX; 1263 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1264 if (rlim.rlim_max == ULONG_MAX) 1265 rlim.rlim_max = LONG_MAX; 1266#endif 1267 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1268} 1269 1270int 1271linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1272{ 1273 struct l_rlimit rlim; 1274 struct proc *p = td->td_proc; 1275 struct rlimit bsd_rlim; 1276 u_int which; 1277 1278#ifdef DEBUG 1279 if (ldebug(getrlimit)) 1280 printf(ARGS(getrlimit, "%d, %p"), 1281 args->resource, (void *)args->rlim); 1282#endif 1283 1284 if (args->resource >= LINUX_RLIM_NLIMITS) 1285 return (EINVAL); 1286 1287 which = linux_to_bsd_resource[args->resource]; 1288 if (which == -1) 1289 return (EINVAL); 1290 1291 PROC_LOCK(p); 1292 lim_rlimit(p, which, &bsd_rlim); 1293 PROC_UNLOCK(p); 1294 1295 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1296 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1297 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1298} 1299 1300int 1301linux_sched_setscheduler(struct thread *td, 1302 struct linux_sched_setscheduler_args *args) 1303{ 1304 struct sched_setscheduler_args bsd; 1305 1306#ifdef DEBUG 1307 if (ldebug(sched_setscheduler)) 1308 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1309 args->pid, args->policy, (const void *)args->param); 1310#endif 1311 1312 switch (args->policy) { 1313 case LINUX_SCHED_OTHER: 1314 bsd.policy = SCHED_OTHER; 1315 break; 1316 case LINUX_SCHED_FIFO: 1317 bsd.policy = SCHED_FIFO; 1318 break; 1319 case LINUX_SCHED_RR: 1320 bsd.policy = SCHED_RR; 1321 break; 1322 default: 1323 return (EINVAL); 1324 } 1325 1326 bsd.pid = args->pid; 1327 bsd.param = (struct sched_param *)args->param; 1328 return (sys_sched_setscheduler(td, &bsd)); 1329} 1330 1331int 1332linux_sched_getscheduler(struct thread *td, 1333 struct linux_sched_getscheduler_args *args) 1334{ 1335 struct sched_getscheduler_args bsd; 1336 int error; 1337 1338#ifdef DEBUG 1339 if (ldebug(sched_getscheduler)) 1340 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1341#endif 1342 1343 bsd.pid = args->pid; 1344 error = sys_sched_getscheduler(td, &bsd); 1345 1346 switch (td->td_retval[0]) { 1347 case SCHED_OTHER: 1348 td->td_retval[0] = LINUX_SCHED_OTHER; 1349 break; 1350 case SCHED_FIFO: 1351 td->td_retval[0] = LINUX_SCHED_FIFO; 1352 break; 1353 case SCHED_RR: 1354 td->td_retval[0] = LINUX_SCHED_RR; 1355 break; 1356 } 1357 1358 return (error); 1359} 1360 1361int 1362linux_sched_get_priority_max(struct thread *td, 1363 struct linux_sched_get_priority_max_args *args) 1364{ 1365 struct sched_get_priority_max_args bsd; 1366 1367#ifdef DEBUG 1368 if (ldebug(sched_get_priority_max)) 1369 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1370#endif 1371 1372 switch (args->policy) { 1373 case LINUX_SCHED_OTHER: 1374 bsd.policy = SCHED_OTHER; 1375 break; 1376 case LINUX_SCHED_FIFO: 1377 bsd.policy = SCHED_FIFO; 1378 break; 1379 case LINUX_SCHED_RR: 1380 bsd.policy = SCHED_RR; 1381 break; 1382 default: 1383 return (EINVAL); 1384 } 1385 return (sys_sched_get_priority_max(td, &bsd)); 1386} 1387 1388int 1389linux_sched_get_priority_min(struct thread *td, 1390 struct linux_sched_get_priority_min_args *args) 1391{ 1392 struct sched_get_priority_min_args bsd; 1393 1394#ifdef DEBUG 1395 if (ldebug(sched_get_priority_min)) 1396 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1397#endif 1398 1399 switch (args->policy) { 1400 case LINUX_SCHED_OTHER: 1401 bsd.policy = SCHED_OTHER; 1402 break; 1403 case LINUX_SCHED_FIFO: 1404 bsd.policy = SCHED_FIFO; 1405 break; 1406 case LINUX_SCHED_RR: 1407 bsd.policy = SCHED_RR; 1408 break; 1409 default: 1410 return (EINVAL); 1411 } 1412 return (sys_sched_get_priority_min(td, &bsd)); 1413} 1414 1415#define REBOOT_CAD_ON 0x89abcdef 1416#define REBOOT_CAD_OFF 0 1417#define REBOOT_HALT 0xcdef0123 1418#define REBOOT_RESTART 0x01234567 1419#define REBOOT_RESTART2 0xA1B2C3D4 1420#define REBOOT_POWEROFF 0x4321FEDC 1421#define REBOOT_MAGIC1 0xfee1dead 1422#define REBOOT_MAGIC2 0x28121969 1423#define REBOOT_MAGIC2A 0x05121996 1424#define REBOOT_MAGIC2B 0x16041998 1425 1426int 1427linux_reboot(struct thread *td, struct linux_reboot_args *args) 1428{ 1429 struct reboot_args bsd_args; 1430 1431#ifdef DEBUG 1432 if (ldebug(reboot)) 1433 printf(ARGS(reboot, "0x%x"), args->cmd); 1434#endif 1435 1436 if (args->magic1 != REBOOT_MAGIC1) 1437 return (EINVAL); 1438 1439 switch (args->magic2) { 1440 case REBOOT_MAGIC2: 1441 case REBOOT_MAGIC2A: 1442 case REBOOT_MAGIC2B: 1443 break; 1444 default: 1445 return (EINVAL); 1446 } 1447 1448 switch (args->cmd) { 1449 case REBOOT_CAD_ON: 1450 case REBOOT_CAD_OFF: 1451 return (priv_check(td, PRIV_REBOOT)); 1452 case REBOOT_HALT: 1453 bsd_args.opt = RB_HALT; 1454 break; 1455 case REBOOT_RESTART: 1456 case REBOOT_RESTART2: 1457 bsd_args.opt = 0; 1458 break; 1459 case REBOOT_POWEROFF: 1460 bsd_args.opt = RB_POWEROFF; 1461 break; 1462 default: 1463 return (EINVAL); 1464 } 1465 return (sys_reboot(td, &bsd_args)); 1466} 1467 1468 1469/* 1470 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1471 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1472 * are assumed to be preserved. The following lightweight syscalls fixes 1473 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1474 * 1475 * linux_getpid() - MP SAFE 1476 * linux_getgid() - MP SAFE 1477 * linux_getuid() - MP SAFE 1478 */ 1479 1480int 1481linux_getpid(struct thread *td, struct linux_getpid_args *args) 1482{ 1483 struct linux_emuldata *em; 1484 1485#ifdef DEBUG 1486 if (ldebug(getpid)) 1487 printf(ARGS(getpid, "")); 1488#endif 1489 1490 if (linux_use26(td)) { 1491 em = em_find(td->td_proc, EMUL_DONTLOCK); 1492 KASSERT(em != NULL, ("getpid: emuldata not found.\n")); 1493 td->td_retval[0] = em->shared->group_pid; 1494 } else { 1495 td->td_retval[0] = td->td_proc->p_pid; 1496 } 1497 1498 return (0); 1499} 1500 1501int 1502linux_gettid(struct thread *td, struct linux_gettid_args *args) 1503{ 1504 1505#ifdef DEBUG 1506 if (ldebug(gettid)) 1507 printf(ARGS(gettid, "")); 1508#endif 1509 1510 td->td_retval[0] = td->td_proc->p_pid; 1511 return (0); 1512} 1513 1514 1515int 1516linux_getppid(struct thread *td, struct linux_getppid_args *args) 1517{ 1518 struct linux_emuldata *em; 1519 struct proc *p, *pp; 1520 1521#ifdef DEBUG 1522 if (ldebug(getppid)) 1523 printf(ARGS(getppid, "")); 1524#endif 1525 1526 if (!linux_use26(td)) { 1527 PROC_LOCK(td->td_proc); 1528 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1529 PROC_UNLOCK(td->td_proc); 1530 return (0); 1531 } 1532 1533 em = em_find(td->td_proc, EMUL_DONTLOCK); 1534 1535 KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); 1536 1537 /* find the group leader */ 1538 p = pfind(em->shared->group_pid); 1539 1540 if (p == NULL) { 1541#ifdef DEBUG 1542 printf(LMSG("parent process not found.\n")); 1543#endif 1544 return (0); 1545 } 1546 1547 pp = p->p_pptr; /* switch to parent */ 1548 PROC_LOCK(pp); 1549 PROC_UNLOCK(p); 1550 1551 /* if its also linux process */ 1552 if (pp->p_sysent == &elf_linux_sysvec) { 1553 em = em_find(pp, EMUL_DONTLOCK); 1554 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); 1555 1556 td->td_retval[0] = em->shared->group_pid; 1557 } else 1558 td->td_retval[0] = pp->p_pid; 1559 1560 PROC_UNLOCK(pp); 1561 1562 return (0); 1563} 1564 1565int 1566linux_getgid(struct thread *td, struct linux_getgid_args *args) 1567{ 1568 1569#ifdef DEBUG 1570 if (ldebug(getgid)) 1571 printf(ARGS(getgid, "")); 1572#endif 1573 1574 td->td_retval[0] = td->td_ucred->cr_rgid; 1575 return (0); 1576} 1577 1578int 1579linux_getuid(struct thread *td, struct linux_getuid_args *args) 1580{ 1581 1582#ifdef DEBUG 1583 if (ldebug(getuid)) 1584 printf(ARGS(getuid, "")); 1585#endif 1586 1587 td->td_retval[0] = td->td_ucred->cr_ruid; 1588 return (0); 1589} 1590 1591 1592int 1593linux_getsid(struct thread *td, struct linux_getsid_args *args) 1594{ 1595 struct getsid_args bsd; 1596 1597#ifdef DEBUG 1598 if (ldebug(getsid)) 1599 printf(ARGS(getsid, "%i"), args->pid); 1600#endif 1601 1602 bsd.pid = args->pid; 1603 return (sys_getsid(td, &bsd)); 1604} 1605 1606int 1607linux_nosys(struct thread *td, struct nosys_args *ignore) 1608{ 1609 1610 return (ENOSYS); 1611} 1612 1613int 1614linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1615{ 1616 struct getpriority_args bsd_args; 1617 int error; 1618 1619#ifdef DEBUG 1620 if (ldebug(getpriority)) 1621 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1622#endif 1623 1624 bsd_args.which = args->which; 1625 bsd_args.who = args->who; 1626 error = sys_getpriority(td, &bsd_args); 1627 td->td_retval[0] = 20 - td->td_retval[0]; 1628 return (error); 1629} 1630 1631int 1632linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1633{ 1634 int name[2]; 1635 1636#ifdef DEBUG 1637 if (ldebug(sethostname)) 1638 printf(ARGS(sethostname, "*, %i"), args->len); 1639#endif 1640 1641 name[0] = CTL_KERN; 1642 name[1] = KERN_HOSTNAME; 1643 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1644 args->len, 0, 0)); 1645} 1646 1647int 1648linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) 1649{ 1650 int name[2]; 1651 1652#ifdef DEBUG 1653 if (ldebug(setdomainname)) 1654 printf(ARGS(setdomainname, "*, %i"), args->len); 1655#endif 1656 1657 name[0] = CTL_KERN; 1658 name[1] = KERN_NISDOMAINNAME; 1659 return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, 1660 args->len, 0, 0)); 1661} 1662 1663int 1664linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1665{ 1666 struct linux_emuldata *em; 1667 1668#ifdef DEBUG 1669 if (ldebug(exit_group)) 1670 printf(ARGS(exit_group, "%i"), args->error_code); 1671#endif 1672 1673 em = em_find(td->td_proc, EMUL_DONTLOCK); 1674 if (em->shared->refs > 1) { 1675 EMUL_SHARED_WLOCK(&emul_shared_lock); 1676 em->shared->flags |= EMUL_SHARED_HASXSTAT; 1677 em->shared->xstat = W_EXITCODE(args->error_code, 0); 1678 EMUL_SHARED_WUNLOCK(&emul_shared_lock); 1679 if (linux_use26(td)) 1680 linux_kill_threads(td, SIGKILL); 1681 } 1682 1683 /* 1684 * XXX: we should send a signal to the parent if 1685 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1686 * as it doesnt occur often. 1687 */ 1688 exit1(td, W_EXITCODE(args->error_code, 0)); 1689 1690 return (0); 1691} 1692 1693#define _LINUX_CAPABILITY_VERSION 0x19980330 1694 1695struct l_user_cap_header { 1696 l_int version; 1697 l_int pid; 1698}; 1699 1700struct l_user_cap_data { 1701 l_int effective; 1702 l_int permitted; 1703 l_int inheritable; 1704}; 1705 1706int 1707linux_capget(struct thread *td, struct linux_capget_args *args) 1708{ 1709 struct l_user_cap_header luch; 1710 struct l_user_cap_data lucd; 1711 int error; 1712 1713 if (args->hdrp == NULL) 1714 return (EFAULT); 1715 1716 error = copyin(args->hdrp, &luch, sizeof(luch)); 1717 if (error != 0) 1718 return (error); 1719 1720 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1721 luch.version = _LINUX_CAPABILITY_VERSION; 1722 error = copyout(&luch, args->hdrp, sizeof(luch)); 1723 if (error) 1724 return (error); 1725 return (EINVAL); 1726 } 1727 1728 if (luch.pid) 1729 return (EPERM); 1730 1731 if (args->datap) { 1732 /* 1733 * The current implementation doesn't support setting 1734 * a capability (it's essentially a stub) so indicate 1735 * that no capabilities are currently set or available 1736 * to request. 1737 */ 1738 bzero (&lucd, sizeof(lucd)); 1739 error = copyout(&lucd, args->datap, sizeof(lucd)); 1740 } 1741 1742 return (error); 1743} 1744 1745int 1746linux_capset(struct thread *td, struct linux_capset_args *args) 1747{ 1748 struct l_user_cap_header luch; 1749 struct l_user_cap_data lucd; 1750 int error; 1751 1752 if (args->hdrp == NULL || args->datap == NULL) 1753 return (EFAULT); 1754 1755 error = copyin(args->hdrp, &luch, sizeof(luch)); 1756 if (error != 0) 1757 return (error); 1758 1759 if (luch.version != _LINUX_CAPABILITY_VERSION) { 1760 luch.version = _LINUX_CAPABILITY_VERSION; 1761 error = copyout(&luch, args->hdrp, sizeof(luch)); 1762 if (error) 1763 return (error); 1764 return (EINVAL); 1765 } 1766 1767 if (luch.pid) 1768 return (EPERM); 1769 1770 error = copyin(args->datap, &lucd, sizeof(lucd)); 1771 if (error != 0) 1772 return (error); 1773 1774 /* We currently don't support setting any capabilities. */ 1775 if (lucd.effective || lucd.permitted || lucd.inheritable) { 1776 linux_msg(td, 1777 "capset effective=0x%x, permitted=0x%x, " 1778 "inheritable=0x%x is not implemented", 1779 (int)lucd.effective, (int)lucd.permitted, 1780 (int)lucd.inheritable); 1781 return (EPERM); 1782 } 1783 1784 return (0); 1785} 1786 1787int 1788linux_prctl(struct thread *td, struct linux_prctl_args *args) 1789{ 1790 int error = 0, max_size; 1791 struct proc *p = td->td_proc; 1792 char comm[LINUX_MAX_COMM_LEN]; 1793 struct linux_emuldata *em; 1794 int pdeath_signal; 1795 1796#ifdef DEBUG 1797 if (ldebug(prctl)) 1798 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, 1799 args->arg2, args->arg3, args->arg4, args->arg5); 1800#endif 1801 1802 switch (args->option) { 1803 case LINUX_PR_SET_PDEATHSIG: 1804 if (!LINUX_SIG_VALID(args->arg2)) 1805 return (EINVAL); 1806 em = em_find(p, EMUL_DOLOCK); 1807 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1808 em->pdeath_signal = args->arg2; 1809 EMUL_UNLOCK(&emul_lock); 1810 break; 1811 case LINUX_PR_GET_PDEATHSIG: 1812 em = em_find(p, EMUL_DOLOCK); 1813 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1814 pdeath_signal = em->pdeath_signal; 1815 EMUL_UNLOCK(&emul_lock); 1816 error = copyout(&pdeath_signal, 1817 (void *)(register_t)args->arg2, 1818 sizeof(pdeath_signal)); 1819 break; 1820 case LINUX_PR_GET_KEEPCAPS: 1821 /* 1822 * Indicate that we always clear the effective and 1823 * permitted capability sets when the user id becomes 1824 * non-zero (actually the capability sets are simply 1825 * always zero in the current implementation). 1826 */ 1827 td->td_retval[0] = 0; 1828 break; 1829 case LINUX_PR_SET_KEEPCAPS: 1830 /* 1831 * Ignore requests to keep the effective and permitted 1832 * capability sets when the user id becomes non-zero. 1833 */ 1834 break; 1835 case LINUX_PR_SET_NAME: 1836 /* 1837 * To be on the safe side we need to make sure to not 1838 * overflow the size a linux program expects. We already 1839 * do this here in the copyin, so that we don't need to 1840 * check on copyout. 1841 */ 1842 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1843 error = copyinstr((void *)(register_t)args->arg2, comm, 1844 max_size, NULL); 1845 1846 /* Linux silently truncates the name if it is too long. */ 1847 if (error == ENAMETOOLONG) { 1848 /* 1849 * XXX: copyinstr() isn't documented to populate the 1850 * array completely, so do a copyin() to be on the 1851 * safe side. This should be changed in case 1852 * copyinstr() is changed to guarantee this. 1853 */ 1854 error = copyin((void *)(register_t)args->arg2, comm, 1855 max_size - 1); 1856 comm[max_size - 1] = '\0'; 1857 } 1858 if (error) 1859 return (error); 1860 1861 PROC_LOCK(p); 1862 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1863 PROC_UNLOCK(p); 1864 break; 1865 case LINUX_PR_GET_NAME: 1866 PROC_LOCK(p); 1867 strlcpy(comm, p->p_comm, sizeof(comm)); 1868 PROC_UNLOCK(p); 1869 error = copyout(comm, (void *)(register_t)args->arg2, 1870 strlen(comm) + 1); 1871 break; 1872 default: 1873 error = EINVAL; 1874 break; 1875 } 1876 1877 return (error); 1878} 1879 1880/* 1881 * Get affinity of a process. 1882 */ 1883int 1884linux_sched_getaffinity(struct thread *td, 1885 struct linux_sched_getaffinity_args *args) 1886{ 1887 int error; 1888 struct cpuset_getaffinity_args cga; 1889 1890#ifdef DEBUG 1891 if (ldebug(sched_getaffinity)) 1892 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, 1893 args->len); 1894#endif 1895 if (args->len < sizeof(cpuset_t)) 1896 return (EINVAL); 1897 1898 cga.level = CPU_LEVEL_WHICH; 1899 cga.which = CPU_WHICH_PID; 1900 cga.id = args->pid; 1901 cga.cpusetsize = sizeof(cpuset_t); 1902 cga.mask = (cpuset_t *) args->user_mask_ptr; 1903 1904 if ((error = sys_cpuset_getaffinity(td, &cga)) == 0) 1905 td->td_retval[0] = sizeof(cpuset_t); 1906 1907 return (error); 1908} 1909 1910/* 1911 * Set affinity of a process. 1912 */ 1913int 1914linux_sched_setaffinity(struct thread *td, 1915 struct linux_sched_setaffinity_args *args) 1916{ 1917 struct cpuset_setaffinity_args csa; 1918 1919#ifdef DEBUG 1920 if (ldebug(sched_setaffinity)) 1921 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, 1922 args->len); 1923#endif 1924 if (args->len < sizeof(cpuset_t)) 1925 return (EINVAL); 1926 1927 csa.level = CPU_LEVEL_WHICH; 1928 csa.which = CPU_WHICH_PID; 1929 csa.id = args->pid; 1930 csa.cpusetsize = sizeof(cpuset_t); 1931 csa.mask = (cpuset_t *) args->user_mask_ptr; 1932 1933 return (sys_cpuset_setaffinity(td, &csa)); 1934} 1935