1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1994-1995 Søren Schmidt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_compat.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/capsicum.h> 37 #include <sys/conf.h> 38 #include <sys/dirent.h> 39 #include <sys/fcntl.h> 40 #include <sys/file.h> 41 #include <sys/filedesc.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/mount.h> 45 #include <sys/mutex.h> 46 #include <sys/namei.h> 47 #include <sys/proc.h> 48 #include <sys/stat.h> 49 #include <sys/sx.h> 50 #include <sys/syscallsubr.h> 51 #include <sys/sysproto.h> 52 #include <sys/tty.h> 53 #include <sys/unistd.h> 54 #include <sys/vnode.h> 55 56 #ifdef COMPAT_LINUX32 57 #include <machine/../linux32/linux.h> 58 #include <machine/../linux32/linux32_proto.h> 59 #else 60 #include <machine/../linux/linux.h> 61 #include <machine/../linux/linux_proto.h> 62 #endif 63 #include <compat/linux/linux_misc.h> 64 #include <compat/linux/linux_util.h> 65 #include <compat/linux/linux_file.h> 66 67 static int linux_common_open(struct thread *, int, char *, int, int); 68 static int linux_getdents_error(struct thread *, int, int); 69 70 71 #ifdef LINUX_LEGACY_SYSCALLS 72 int 73 linux_creat(struct thread *td, struct linux_creat_args *args) 74 { 75 char *path; 76 int error; 77 78 LCONVPATHEXIST(td, args->path, &path); 79 #ifdef DEBUG 80 if (ldebug(creat)) 81 printf(ARGS(creat, "%s, %d"), path, args->mode); 82 #endif 83 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, 84 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 85 LFREEPATH(path); 86 return (error); 87 } 88 #endif 89 90 static int 91 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode) 92 { 93 struct proc *p = td->td_proc; 94 struct file *fp; 95 int fd; 96 int bsd_flags, error; 97 98 bsd_flags = 0; 99 switch (l_flags & LINUX_O_ACCMODE) { 100 case LINUX_O_WRONLY: 101 bsd_flags |= O_WRONLY; 102 break; 103 case LINUX_O_RDWR: 104 bsd_flags |= O_RDWR; 105 break; 106 default: 107 bsd_flags |= O_RDONLY; 108 } 109 if (l_flags & LINUX_O_NDELAY) 110 bsd_flags |= O_NONBLOCK; 111 if (l_flags & LINUX_O_APPEND) 112 bsd_flags |= O_APPEND; 113 if (l_flags & LINUX_O_SYNC) 114 bsd_flags |= O_FSYNC; 115 if (l_flags & LINUX_O_NONBLOCK) 116 bsd_flags |= O_NONBLOCK; 117 if (l_flags & LINUX_FASYNC) 118 bsd_flags |= O_ASYNC; 119 if (l_flags & LINUX_O_CREAT) 120 bsd_flags |= O_CREAT; 121 if (l_flags & LINUX_O_TRUNC) 122 bsd_flags |= O_TRUNC; 123 if (l_flags & LINUX_O_EXCL) 124 bsd_flags |= O_EXCL; 125 if (l_flags & LINUX_O_NOCTTY) 126 bsd_flags |= O_NOCTTY; 127 if (l_flags & LINUX_O_DIRECT) 128 bsd_flags |= O_DIRECT; 129 if (l_flags & LINUX_O_NOFOLLOW) 130 bsd_flags |= O_NOFOLLOW; 131 if (l_flags & LINUX_O_DIRECTORY) 132 bsd_flags |= O_DIRECTORY; 133 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */ 134 135 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode); 136 if (error != 0) 137 goto done; 138 if (bsd_flags & O_NOCTTY) 139 goto done; 140 141 /* 142 * XXX In between kern_openat() and fget(), another process 143 * having the same filedesc could use that fd without 144 * checking below. 145 */ 146 fd = td->td_retval[0]; 147 if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) { 148 if (fp->f_type != DTYPE_VNODE) { 149 fdrop(fp, td); 150 goto done; 151 } 152 sx_slock(&proctree_lock); 153 PROC_LOCK(p); 154 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 155 PROC_UNLOCK(p); 156 sx_sunlock(&proctree_lock); 157 /* XXXPJD: Verify if TIOCSCTTY is allowed. */ 158 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, 159 td->td_ucred, td); 160 } else { 161 PROC_UNLOCK(p); 162 sx_sunlock(&proctree_lock); 163 } 164 fdrop(fp, td); 165 } 166 167 done: 168 #ifdef DEBUG 169 #ifdef LINUX_LEGACY_SYSCALLS 170 if (ldebug(open)) 171 #else 172 if (ldebug(openat)) 173 #endif 174 printf(LMSG("open returns error %d"), error); 175 #endif 176 LFREEPATH(path); 177 return (error); 178 } 179 180 int 181 linux_openat(struct thread *td, struct linux_openat_args *args) 182 { 183 char *path; 184 int dfd; 185 186 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 187 if (args->flags & LINUX_O_CREAT) 188 LCONVPATH_AT(td, args->filename, &path, 1, dfd); 189 else 190 LCONVPATH_AT(td, args->filename, &path, 0, dfd); 191 #ifdef DEBUG 192 if (ldebug(openat)) 193 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd, 194 path, args->flags, args->mode); 195 #endif 196 return (linux_common_open(td, dfd, path, args->flags, args->mode)); 197 } 198 199 #ifdef LINUX_LEGACY_SYSCALLS 200 int 201 linux_open(struct thread *td, struct linux_open_args *args) 202 { 203 char *path; 204 205 if (args->flags & LINUX_O_CREAT) 206 LCONVPATHCREAT(td, args->path, &path); 207 else 208 LCONVPATHEXIST(td, args->path, &path); 209 #ifdef DEBUG 210 if (ldebug(open)) 211 printf(ARGS(open, "%s, 0x%x, 0x%x"), 212 path, args->flags, args->mode); 213 #endif 214 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode)); 215 } 216 #endif 217 218 int 219 linux_lseek(struct thread *td, struct linux_lseek_args *args) 220 { 221 222 #ifdef DEBUG 223 if (ldebug(lseek)) 224 printf(ARGS(lseek, "%d, %ld, %d"), 225 args->fdes, (long)args->off, args->whence); 226 #endif 227 return (kern_lseek(td, args->fdes, args->off, args->whence)); 228 } 229 230 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 231 int 232 linux_llseek(struct thread *td, struct linux_llseek_args *args) 233 { 234 int error; 235 off_t off; 236 237 #ifdef DEBUG 238 if (ldebug(llseek)) 239 printf(ARGS(llseek, "%d, %d:%d, %d"), 240 args->fd, args->ohigh, args->olow, args->whence); 241 #endif 242 off = (args->olow) | (((off_t) args->ohigh) << 32); 243 244 error = kern_lseek(td, args->fd, off, args->whence); 245 if (error != 0) 246 return (error); 247 248 error = copyout(td->td_retval, args->res, sizeof(off_t)); 249 if (error != 0) 250 return (error); 251 252 td->td_retval[0] = 0; 253 return (0); 254 } 255 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 256 257 /* 258 * Note that linux_getdents(2) and linux_getdents64(2) have the same 259 * arguments. They only differ in the definition of struct dirent they 260 * operate on. 261 * Note that linux_readdir(2) is a special case of linux_getdents(2) 262 * where count is always equals 1, meaning that the buffer is one 263 * dirent-structure in size and that the code can't handle more anyway. 264 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2) 265 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will 266 * trash user stack. 267 */ 268 269 static int 270 linux_getdents_error(struct thread *td, int fd, int err) 271 { 272 struct vnode *vp; 273 struct file *fp; 274 int error; 275 276 /* Linux return ENOTDIR in case when fd is not a directory. */ 277 error = getvnode(td, fd, &cap_read_rights, &fp); 278 if (error != 0) 279 return (error); 280 vp = fp->f_vnode; 281 if (vp->v_type != VDIR) { 282 fdrop(fp, td); 283 return (ENOTDIR); 284 } 285 fdrop(fp, td); 286 return (err); 287 } 288 289 struct l_dirent { 290 l_ulong d_ino; 291 l_off_t d_off; 292 l_ushort d_reclen; 293 char d_name[LINUX_NAME_MAX + 1]; 294 }; 295 296 struct l_dirent64 { 297 uint64_t d_ino; 298 int64_t d_off; 299 l_ushort d_reclen; 300 u_char d_type; 301 char d_name[LINUX_NAME_MAX + 1]; 302 }; 303 304 /* 305 * Linux uses the last byte in the dirent buffer to store d_type, 306 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes. 307 */ 308 #define LINUX_RECLEN(namlen) \ 309 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong)) 310 311 #define LINUX_RECLEN64(namlen) \ 312 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \ 313 sizeof(uint64_t)) 314 315 #ifdef LINUX_LEGACY_SYSCALLS 316 int 317 linux_getdents(struct thread *td, struct linux_getdents_args *args) 318 { 319 struct dirent *bdp; 320 caddr_t inp, buf; /* BSD-format */ 321 int len, reclen; /* BSD-format */ 322 caddr_t outp; /* Linux-format */ 323 int resid, linuxreclen; /* Linux-format */ 324 caddr_t lbuf; /* Linux-format */ 325 off_t base; 326 struct l_dirent *linux_dirent; 327 int buflen, error; 328 size_t retval; 329 330 #ifdef DEBUG 331 if (ldebug(getdents)) 332 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count); 333 #endif 334 buflen = min(args->count, MAXBSIZE); 335 buf = malloc(buflen, M_TEMP, M_WAITOK); 336 337 error = kern_getdirentries(td, args->fd, buf, buflen, 338 &base, NULL, UIO_SYSSPACE); 339 if (error != 0) { 340 error = linux_getdents_error(td, args->fd, error); 341 goto out1; 342 } 343 344 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 345 346 len = td->td_retval[0]; 347 inp = buf; 348 outp = (caddr_t)args->dent; 349 resid = args->count; 350 retval = 0; 351 352 while (len > 0) { 353 bdp = (struct dirent *) inp; 354 reclen = bdp->d_reclen; 355 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 356 /* 357 * No more space in the user supplied dirent buffer. 358 * Return EINVAL. 359 */ 360 if (resid < linuxreclen) { 361 error = EINVAL; 362 goto out; 363 } 364 365 linux_dirent = (struct l_dirent*)lbuf; 366 linux_dirent->d_ino = bdp->d_fileno; 367 linux_dirent->d_off = base + reclen; 368 linux_dirent->d_reclen = linuxreclen; 369 /* 370 * Copy d_type to last byte of l_dirent buffer 371 */ 372 lbuf[linuxreclen - 1] = bdp->d_type; 373 strlcpy(linux_dirent->d_name, bdp->d_name, 374 linuxreclen - offsetof(struct l_dirent, d_name)-1); 375 error = copyout(linux_dirent, outp, linuxreclen); 376 if (error != 0) 377 goto out; 378 379 inp += reclen; 380 base += reclen; 381 len -= reclen; 382 383 retval += linuxreclen; 384 outp += linuxreclen; 385 resid -= linuxreclen; 386 } 387 td->td_retval[0] = retval; 388 389 out: 390 free(lbuf, M_TEMP); 391 out1: 392 free(buf, M_TEMP); 393 return (error); 394 } 395 #endif 396 397 int 398 linux_getdents64(struct thread *td, struct linux_getdents64_args *args) 399 { 400 struct dirent *bdp; 401 caddr_t inp, buf; /* BSD-format */ 402 int len, reclen; /* BSD-format */ 403 caddr_t outp; /* Linux-format */ 404 int resid, linuxreclen; /* Linux-format */ 405 caddr_t lbuf; /* Linux-format */ 406 off_t base; 407 struct l_dirent64 *linux_dirent64; 408 int buflen, error; 409 size_t retval; 410 411 #ifdef DEBUG 412 if (ldebug(getdents64)) 413 uprintf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count); 414 #endif 415 buflen = min(args->count, MAXBSIZE); 416 buf = malloc(buflen, M_TEMP, M_WAITOK); 417 418 error = kern_getdirentries(td, args->fd, buf, buflen, 419 &base, NULL, UIO_SYSSPACE); 420 if (error != 0) { 421 error = linux_getdents_error(td, args->fd, error); 422 goto out1; 423 } 424 425 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 426 427 len = td->td_retval[0]; 428 inp = buf; 429 outp = (caddr_t)args->dirent; 430 resid = args->count; 431 retval = 0; 432 433 while (len > 0) { 434 bdp = (struct dirent *) inp; 435 reclen = bdp->d_reclen; 436 linuxreclen = LINUX_RECLEN64(bdp->d_namlen); 437 /* 438 * No more space in the user supplied dirent buffer. 439 * Return EINVAL. 440 */ 441 if (resid < linuxreclen) { 442 error = EINVAL; 443 goto out; 444 } 445 446 linux_dirent64 = (struct l_dirent64*)lbuf; 447 linux_dirent64->d_ino = bdp->d_fileno; 448 linux_dirent64->d_off = base + reclen; 449 linux_dirent64->d_reclen = linuxreclen; 450 linux_dirent64->d_type = bdp->d_type; 451 strlcpy(linux_dirent64->d_name, bdp->d_name, 452 linuxreclen - offsetof(struct l_dirent64, d_name)); 453 error = copyout(linux_dirent64, outp, linuxreclen); 454 if (error != 0) 455 goto out; 456 457 inp += reclen; 458 base += reclen; 459 len -= reclen; 460 461 retval += linuxreclen; 462 outp += linuxreclen; 463 resid -= linuxreclen; 464 } 465 td->td_retval[0] = retval; 466 467 out: 468 free(lbuf, M_TEMP); 469 out1: 470 free(buf, M_TEMP); 471 return (error); 472 } 473 474 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 475 int 476 linux_readdir(struct thread *td, struct linux_readdir_args *args) 477 { 478 struct dirent *bdp; 479 caddr_t buf; /* BSD-format */ 480 int linuxreclen; /* Linux-format */ 481 caddr_t lbuf; /* Linux-format */ 482 off_t base; 483 struct l_dirent *linux_dirent; 484 int buflen, error; 485 486 #ifdef DEBUG 487 if (ldebug(readdir)) 488 printf(ARGS(readdir, "%d, *"), args->fd); 489 #endif 490 buflen = LINUX_RECLEN(LINUX_NAME_MAX); 491 buf = malloc(buflen, M_TEMP, M_WAITOK); 492 493 error = kern_getdirentries(td, args->fd, buf, buflen, 494 &base, NULL, UIO_SYSSPACE); 495 if (error != 0) { 496 error = linux_getdents_error(td, args->fd, error); 497 goto out; 498 } 499 if (td->td_retval[0] == 0) 500 goto out; 501 502 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 503 504 bdp = (struct dirent *) buf; 505 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 506 507 linux_dirent = (struct l_dirent*)lbuf; 508 linux_dirent->d_ino = bdp->d_fileno; 509 linux_dirent->d_off = linuxreclen; 510 linux_dirent->d_reclen = bdp->d_namlen; 511 strlcpy(linux_dirent->d_name, bdp->d_name, 512 linuxreclen - offsetof(struct l_dirent, d_name)); 513 error = copyout(linux_dirent, args->dent, linuxreclen); 514 if (error == 0) 515 td->td_retval[0] = linuxreclen; 516 517 free(lbuf, M_TEMP); 518 out: 519 free(buf, M_TEMP); 520 return (error); 521 } 522 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 523 524 525 /* 526 * These exist mainly for hooks for doing /compat/linux translation. 527 */ 528 529 #ifdef LINUX_LEGACY_SYSCALLS 530 int 531 linux_access(struct thread *td, struct linux_access_args *args) 532 { 533 char *path; 534 int error; 535 536 /* Linux convention. */ 537 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 538 return (EINVAL); 539 540 LCONVPATHEXIST(td, args->path, &path); 541 542 #ifdef DEBUG 543 if (ldebug(access)) 544 printf(ARGS(access, "%s, %d"), path, args->amode); 545 #endif 546 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0, 547 args->amode); 548 LFREEPATH(path); 549 550 return (error); 551 } 552 #endif 553 554 int 555 linux_faccessat(struct thread *td, struct linux_faccessat_args *args) 556 { 557 char *path; 558 int error, dfd; 559 560 /* Linux convention. */ 561 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 562 return (EINVAL); 563 564 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 565 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 566 567 #ifdef DEBUG 568 if (ldebug(faccessat)) 569 printf(ARGS(access, "%s, %d"), path, args->amode); 570 #endif 571 572 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode); 573 LFREEPATH(path); 574 575 return (error); 576 } 577 578 #ifdef LINUX_LEGACY_SYSCALLS 579 int 580 linux_unlink(struct thread *td, struct linux_unlink_args *args) 581 { 582 char *path; 583 int error; 584 struct stat st; 585 586 LCONVPATHEXIST(td, args->path, &path); 587 588 #ifdef DEBUG 589 if (ldebug(unlink)) 590 printf(ARGS(unlink, "%s"), path); 591 #endif 592 593 error = kern_funlinkat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0, 0); 594 if (error == EPERM) { 595 /* Introduce POSIX noncompliant behaviour of Linux */ 596 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st, 597 NULL) == 0) { 598 if (S_ISDIR(st.st_mode)) 599 error = EISDIR; 600 } 601 } 602 LFREEPATH(path); 603 return (error); 604 } 605 #endif 606 607 int 608 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args) 609 { 610 char *path; 611 int error, dfd; 612 struct stat st; 613 614 if (args->flag & ~LINUX_AT_REMOVEDIR) 615 return (EINVAL); 616 617 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 618 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 619 620 #ifdef DEBUG 621 if (ldebug(unlinkat)) 622 printf(ARGS(unlinkat, "%s"), path); 623 #endif 624 625 if (args->flag & LINUX_AT_REMOVEDIR) 626 error = kern_frmdirat(td, dfd, path, FD_NONE, UIO_SYSSPACE, 0); 627 else 628 error = kern_funlinkat(td, dfd, path, FD_NONE, UIO_SYSSPACE, 0, 629 0); 630 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) { 631 /* Introduce POSIX noncompliant behaviour of Linux */ 632 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path, 633 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode)) 634 error = EISDIR; 635 } 636 LFREEPATH(path); 637 return (error); 638 } 639 int 640 linux_chdir(struct thread *td, struct linux_chdir_args *args) 641 { 642 char *path; 643 int error; 644 645 LCONVPATHEXIST(td, args->path, &path); 646 647 #ifdef DEBUG 648 if (ldebug(chdir)) 649 printf(ARGS(chdir, "%s"), path); 650 #endif 651 error = kern_chdir(td, path, UIO_SYSSPACE); 652 LFREEPATH(path); 653 return (error); 654 } 655 656 #ifdef LINUX_LEGACY_SYSCALLS 657 int 658 linux_chmod(struct thread *td, struct linux_chmod_args *args) 659 { 660 char *path; 661 int error; 662 663 LCONVPATHEXIST(td, args->path, &path); 664 665 #ifdef DEBUG 666 if (ldebug(chmod)) 667 printf(ARGS(chmod, "%s, %d"), path, args->mode); 668 #endif 669 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE, 670 args->mode, 0); 671 LFREEPATH(path); 672 return (error); 673 } 674 #endif 675 676 int 677 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args) 678 { 679 char *path; 680 int error, dfd; 681 682 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 683 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 684 685 #ifdef DEBUG 686 if (ldebug(fchmodat)) 687 printf(ARGS(fchmodat, "%s, %d"), path, args->mode); 688 #endif 689 690 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0); 691 LFREEPATH(path); 692 return (error); 693 } 694 695 #ifdef LINUX_LEGACY_SYSCALLS 696 int 697 linux_mkdir(struct thread *td, struct linux_mkdir_args *args) 698 { 699 char *path; 700 int error; 701 702 LCONVPATHCREAT(td, args->path, &path); 703 704 #ifdef DEBUG 705 if (ldebug(mkdir)) 706 printf(ARGS(mkdir, "%s, %d"), path, args->mode); 707 #endif 708 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode); 709 LFREEPATH(path); 710 return (error); 711 } 712 #endif 713 714 int 715 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args) 716 { 717 char *path; 718 int error, dfd; 719 720 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 721 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd); 722 723 #ifdef DEBUG 724 if (ldebug(mkdirat)) 725 printf(ARGS(mkdirat, "%s, %d"), path, args->mode); 726 #endif 727 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode); 728 LFREEPATH(path); 729 return (error); 730 } 731 732 #ifdef LINUX_LEGACY_SYSCALLS 733 int 734 linux_rmdir(struct thread *td, struct linux_rmdir_args *args) 735 { 736 char *path; 737 int error; 738 739 LCONVPATHEXIST(td, args->path, &path); 740 741 #ifdef DEBUG 742 if (ldebug(rmdir)) 743 printf(ARGS(rmdir, "%s"), path); 744 #endif 745 error = kern_frmdirat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0); 746 LFREEPATH(path); 747 return (error); 748 } 749 750 int 751 linux_rename(struct thread *td, struct linux_rename_args *args) 752 { 753 char *from, *to; 754 int error; 755 756 LCONVPATHEXIST(td, args->from, &from); 757 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 758 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 759 if (to == NULL) { 760 LFREEPATH(from); 761 return (error); 762 } 763 764 #ifdef DEBUG 765 if (ldebug(rename)) 766 printf(ARGS(rename, "%s, %s"), from, to); 767 #endif 768 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE); 769 LFREEPATH(from); 770 LFREEPATH(to); 771 return (error); 772 } 773 #endif 774 775 int 776 linux_renameat(struct thread *td, struct linux_renameat_args *args) 777 { 778 char *from, *to; 779 int error, olddfd, newdfd; 780 781 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 782 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 783 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd); 784 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 785 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 786 if (to == NULL) { 787 LFREEPATH(from); 788 return (error); 789 } 790 791 #ifdef DEBUG 792 if (ldebug(renameat)) 793 printf(ARGS(renameat, "%s, %s"), from, to); 794 #endif 795 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE); 796 LFREEPATH(from); 797 LFREEPATH(to); 798 return (error); 799 } 800 801 #ifdef LINUX_LEGACY_SYSCALLS 802 int 803 linux_symlink(struct thread *td, struct linux_symlink_args *args) 804 { 805 char *path, *to; 806 int error; 807 808 LCONVPATHEXIST(td, args->path, &path); 809 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 810 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 811 if (to == NULL) { 812 LFREEPATH(path); 813 return (error); 814 } 815 816 #ifdef DEBUG 817 if (ldebug(symlink)) 818 printf(ARGS(symlink, "%s, %s"), path, to); 819 #endif 820 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE); 821 LFREEPATH(path); 822 LFREEPATH(to); 823 return (error); 824 } 825 #endif 826 827 int 828 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args) 829 { 830 char *path, *to; 831 int error, dfd; 832 833 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 834 LCONVPATHEXIST(td, args->oldname, &path); 835 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 836 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd); 837 if (to == NULL) { 838 LFREEPATH(path); 839 return (error); 840 } 841 842 #ifdef DEBUG 843 if (ldebug(symlinkat)) 844 printf(ARGS(symlinkat, "%s, %s"), path, to); 845 #endif 846 847 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE); 848 LFREEPATH(path); 849 LFREEPATH(to); 850 return (error); 851 } 852 853 #ifdef LINUX_LEGACY_SYSCALLS 854 int 855 linux_readlink(struct thread *td, struct linux_readlink_args *args) 856 { 857 char *name; 858 int error; 859 860 LCONVPATHEXIST(td, args->name, &name); 861 862 #ifdef DEBUG 863 if (ldebug(readlink)) 864 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf, 865 args->count); 866 #endif 867 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE, 868 args->buf, UIO_USERSPACE, args->count); 869 LFREEPATH(name); 870 return (error); 871 } 872 #endif 873 874 int 875 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args) 876 { 877 char *name; 878 int error, dfd; 879 880 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 881 LCONVPATHEXIST_AT(td, args->path, &name, dfd); 882 883 #ifdef DEBUG 884 if (ldebug(readlinkat)) 885 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf, 886 args->bufsiz); 887 #endif 888 889 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf, 890 UIO_USERSPACE, args->bufsiz); 891 LFREEPATH(name); 892 return (error); 893 } 894 895 int 896 linux_truncate(struct thread *td, struct linux_truncate_args *args) 897 { 898 char *path; 899 int error; 900 901 LCONVPATHEXIST(td, args->path, &path); 902 903 #ifdef DEBUG 904 if (ldebug(truncate)) 905 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length); 906 #endif 907 908 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 909 LFREEPATH(path); 910 return (error); 911 } 912 913 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 914 int 915 linux_truncate64(struct thread *td, struct linux_truncate64_args *args) 916 { 917 char *path; 918 int error; 919 920 LCONVPATHEXIST(td, args->path, &path); 921 922 #ifdef DEBUG 923 if (ldebug(truncate64)) 924 printf(ARGS(truncate64, "%s, %jd"), path, args->length); 925 #endif 926 927 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 928 LFREEPATH(path); 929 return (error); 930 } 931 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 932 933 int 934 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args) 935 { 936 937 return (kern_ftruncate(td, args->fd, args->length)); 938 } 939 940 #ifdef LINUX_LEGACY_SYSCALLS 941 int 942 linux_link(struct thread *td, struct linux_link_args *args) 943 { 944 char *path, *to; 945 int error; 946 947 LCONVPATHEXIST(td, args->path, &path); 948 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 949 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 950 if (to == NULL) { 951 LFREEPATH(path); 952 return (error); 953 } 954 955 #ifdef DEBUG 956 if (ldebug(link)) 957 printf(ARGS(link, "%s, %s"), path, to); 958 #endif 959 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE, 960 FOLLOW); 961 LFREEPATH(path); 962 LFREEPATH(to); 963 return (error); 964 } 965 #endif 966 967 int 968 linux_linkat(struct thread *td, struct linux_linkat_args *args) 969 { 970 char *path, *to; 971 int error, olddfd, newdfd, follow; 972 973 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW) 974 return (EINVAL); 975 976 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 977 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 978 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd); 979 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 980 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 981 if (to == NULL) { 982 LFREEPATH(path); 983 return (error); 984 } 985 986 #ifdef DEBUG 987 if (ldebug(linkat)) 988 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path, 989 args->newdfd, to, args->flag); 990 #endif 991 992 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW : 993 FOLLOW; 994 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow); 995 LFREEPATH(path); 996 LFREEPATH(to); 997 return (error); 998 } 999 1000 int 1001 linux_fdatasync(td, uap) 1002 struct thread *td; 1003 struct linux_fdatasync_args *uap; 1004 { 1005 1006 return (kern_fsync(td, uap->fd, false)); 1007 } 1008 1009 int 1010 linux_pread(struct thread *td, struct linux_pread_args *uap) 1011 { 1012 struct vnode *vp; 1013 int error; 1014 1015 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, uap->offset); 1016 if (error == 0) { 1017 /* This seems to violate POSIX but Linux does it. */ 1018 error = fgetvp(td, uap->fd, &cap_pread_rights, &vp); 1019 if (error != 0) 1020 return (error); 1021 if (vp->v_type == VDIR) { 1022 vrele(vp); 1023 return (EISDIR); 1024 } 1025 vrele(vp); 1026 } 1027 return (error); 1028 } 1029 1030 int 1031 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap) 1032 { 1033 1034 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, uap->offset)); 1035 } 1036 1037 int 1038 linux_preadv(struct thread *td, struct linux_preadv_args *uap) 1039 { 1040 struct uio *auio; 1041 int error; 1042 off_t offset; 1043 1044 /* 1045 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES 1046 * pos_l and pos_h, respectively, contain the 1047 * low order and high order 32 bits of offset. 1048 */ 1049 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1050 (sizeof(offset) * 4)) | uap->pos_l; 1051 if (offset < 0) 1052 return (EINVAL); 1053 #ifdef COMPAT_LINUX32 1054 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1055 #else 1056 error = copyinuio(uap->vec, uap->vlen, &auio); 1057 #endif 1058 if (error != 0) 1059 return (error); 1060 error = kern_preadv(td, uap->fd, auio, offset); 1061 free(auio, M_IOV); 1062 return (error); 1063 } 1064 1065 int 1066 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap) 1067 { 1068 struct uio *auio; 1069 int error; 1070 off_t offset; 1071 1072 /* 1073 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES 1074 * pos_l and pos_h, respectively, contain the 1075 * low order and high order 32 bits of offset. 1076 */ 1077 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1078 (sizeof(offset) * 4)) | uap->pos_l; 1079 if (offset < 0) 1080 return (EINVAL); 1081 #ifdef COMPAT_LINUX32 1082 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1083 #else 1084 error = copyinuio(uap->vec, uap->vlen, &auio); 1085 #endif 1086 if (error != 0) 1087 return (error); 1088 error = kern_pwritev(td, uap->fd, auio, offset); 1089 free(auio, M_IOV); 1090 return (error); 1091 } 1092 1093 int 1094 linux_mount(struct thread *td, struct linux_mount_args *args) 1095 { 1096 char fstypename[MFSNAMELEN]; 1097 char *mntonname, *mntfromname; 1098 int error, fsflags; 1099 1100 mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1101 mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1102 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1, 1103 NULL); 1104 if (error != 0) 1105 goto out; 1106 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL); 1107 if (error != 0) 1108 goto out; 1109 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL); 1110 if (error != 0) 1111 goto out; 1112 1113 #ifdef DEBUG 1114 if (ldebug(mount)) 1115 printf(ARGS(mount, "%s, %s, %s"), 1116 fstypename, mntfromname, mntonname); 1117 #endif 1118 1119 if (strcmp(fstypename, "ext2") == 0) { 1120 strcpy(fstypename, "ext2fs"); 1121 } else if (strcmp(fstypename, "proc") == 0) { 1122 strcpy(fstypename, "linprocfs"); 1123 } else if (strcmp(fstypename, "vfat") == 0) { 1124 strcpy(fstypename, "msdosfs"); 1125 } 1126 1127 fsflags = 0; 1128 1129 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) { 1130 /* 1131 * Linux SYNC flag is not included; the closest equivalent 1132 * FreeBSD has is !ASYNC, which is our default. 1133 */ 1134 if (args->rwflag & LINUX_MS_RDONLY) 1135 fsflags |= MNT_RDONLY; 1136 if (args->rwflag & LINUX_MS_NOSUID) 1137 fsflags |= MNT_NOSUID; 1138 if (args->rwflag & LINUX_MS_NOEXEC) 1139 fsflags |= MNT_NOEXEC; 1140 if (args->rwflag & LINUX_MS_REMOUNT) 1141 fsflags |= MNT_UPDATE; 1142 } 1143 1144 error = kernel_vmount(fsflags, 1145 "fstype", fstypename, 1146 "fspath", mntonname, 1147 "from", mntfromname, 1148 NULL); 1149 out: 1150 free(mntonname, M_TEMP); 1151 free(mntfromname, M_TEMP); 1152 return (error); 1153 } 1154 1155 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1156 int 1157 linux_oldumount(struct thread *td, struct linux_oldumount_args *args) 1158 { 1159 struct linux_umount_args args2; 1160 1161 args2.path = args->path; 1162 args2.flags = 0; 1163 return (linux_umount(td, &args2)); 1164 } 1165 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1166 1167 #ifdef LINUX_LEGACY_SYSCALLS 1168 int 1169 linux_umount(struct thread *td, struct linux_umount_args *args) 1170 { 1171 struct unmount_args bsd; 1172 1173 bsd.path = args->path; 1174 bsd.flags = args->flags; /* XXX correct? */ 1175 return (sys_unmount(td, &bsd)); 1176 } 1177 #endif 1178 1179 /* 1180 * fcntl family of syscalls 1181 */ 1182 1183 struct l_flock { 1184 l_short l_type; 1185 l_short l_whence; 1186 l_off_t l_start; 1187 l_off_t l_len; 1188 l_pid_t l_pid; 1189 } 1190 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1191 __packed 1192 #endif 1193 ; 1194 1195 static void 1196 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock) 1197 { 1198 switch (linux_flock->l_type) { 1199 case LINUX_F_RDLCK: 1200 bsd_flock->l_type = F_RDLCK; 1201 break; 1202 case LINUX_F_WRLCK: 1203 bsd_flock->l_type = F_WRLCK; 1204 break; 1205 case LINUX_F_UNLCK: 1206 bsd_flock->l_type = F_UNLCK; 1207 break; 1208 default: 1209 bsd_flock->l_type = -1; 1210 break; 1211 } 1212 bsd_flock->l_whence = linux_flock->l_whence; 1213 bsd_flock->l_start = (off_t)linux_flock->l_start; 1214 bsd_flock->l_len = (off_t)linux_flock->l_len; 1215 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1216 bsd_flock->l_sysid = 0; 1217 } 1218 1219 static void 1220 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock) 1221 { 1222 switch (bsd_flock->l_type) { 1223 case F_RDLCK: 1224 linux_flock->l_type = LINUX_F_RDLCK; 1225 break; 1226 case F_WRLCK: 1227 linux_flock->l_type = LINUX_F_WRLCK; 1228 break; 1229 case F_UNLCK: 1230 linux_flock->l_type = LINUX_F_UNLCK; 1231 break; 1232 } 1233 linux_flock->l_whence = bsd_flock->l_whence; 1234 linux_flock->l_start = (l_off_t)bsd_flock->l_start; 1235 linux_flock->l_len = (l_off_t)bsd_flock->l_len; 1236 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1237 } 1238 1239 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1240 struct l_flock64 { 1241 l_short l_type; 1242 l_short l_whence; 1243 l_loff_t l_start; 1244 l_loff_t l_len; 1245 l_pid_t l_pid; 1246 } 1247 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1248 __packed 1249 #endif 1250 ; 1251 1252 static void 1253 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock) 1254 { 1255 switch (linux_flock->l_type) { 1256 case LINUX_F_RDLCK: 1257 bsd_flock->l_type = F_RDLCK; 1258 break; 1259 case LINUX_F_WRLCK: 1260 bsd_flock->l_type = F_WRLCK; 1261 break; 1262 case LINUX_F_UNLCK: 1263 bsd_flock->l_type = F_UNLCK; 1264 break; 1265 default: 1266 bsd_flock->l_type = -1; 1267 break; 1268 } 1269 bsd_flock->l_whence = linux_flock->l_whence; 1270 bsd_flock->l_start = (off_t)linux_flock->l_start; 1271 bsd_flock->l_len = (off_t)linux_flock->l_len; 1272 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1273 bsd_flock->l_sysid = 0; 1274 } 1275 1276 static void 1277 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock) 1278 { 1279 switch (bsd_flock->l_type) { 1280 case F_RDLCK: 1281 linux_flock->l_type = LINUX_F_RDLCK; 1282 break; 1283 case F_WRLCK: 1284 linux_flock->l_type = LINUX_F_WRLCK; 1285 break; 1286 case F_UNLCK: 1287 linux_flock->l_type = LINUX_F_UNLCK; 1288 break; 1289 } 1290 linux_flock->l_whence = bsd_flock->l_whence; 1291 linux_flock->l_start = (l_loff_t)bsd_flock->l_start; 1292 linux_flock->l_len = (l_loff_t)bsd_flock->l_len; 1293 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1294 } 1295 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1296 1297 static int 1298 fcntl_common(struct thread *td, struct linux_fcntl_args *args) 1299 { 1300 struct l_flock linux_flock; 1301 struct flock bsd_flock; 1302 struct file *fp; 1303 long arg; 1304 int error, result; 1305 1306 switch (args->cmd) { 1307 case LINUX_F_DUPFD: 1308 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg)); 1309 1310 case LINUX_F_GETFD: 1311 return (kern_fcntl(td, args->fd, F_GETFD, 0)); 1312 1313 case LINUX_F_SETFD: 1314 return (kern_fcntl(td, args->fd, F_SETFD, args->arg)); 1315 1316 case LINUX_F_GETFL: 1317 error = kern_fcntl(td, args->fd, F_GETFL, 0); 1318 result = td->td_retval[0]; 1319 td->td_retval[0] = 0; 1320 if (result & O_RDONLY) 1321 td->td_retval[0] |= LINUX_O_RDONLY; 1322 if (result & O_WRONLY) 1323 td->td_retval[0] |= LINUX_O_WRONLY; 1324 if (result & O_RDWR) 1325 td->td_retval[0] |= LINUX_O_RDWR; 1326 if (result & O_NDELAY) 1327 td->td_retval[0] |= LINUX_O_NONBLOCK; 1328 if (result & O_APPEND) 1329 td->td_retval[0] |= LINUX_O_APPEND; 1330 if (result & O_FSYNC) 1331 td->td_retval[0] |= LINUX_O_SYNC; 1332 if (result & O_ASYNC) 1333 td->td_retval[0] |= LINUX_FASYNC; 1334 #ifdef LINUX_O_NOFOLLOW 1335 if (result & O_NOFOLLOW) 1336 td->td_retval[0] |= LINUX_O_NOFOLLOW; 1337 #endif 1338 #ifdef LINUX_O_DIRECT 1339 if (result & O_DIRECT) 1340 td->td_retval[0] |= LINUX_O_DIRECT; 1341 #endif 1342 return (error); 1343 1344 case LINUX_F_SETFL: 1345 arg = 0; 1346 if (args->arg & LINUX_O_NDELAY) 1347 arg |= O_NONBLOCK; 1348 if (args->arg & LINUX_O_APPEND) 1349 arg |= O_APPEND; 1350 if (args->arg & LINUX_O_SYNC) 1351 arg |= O_FSYNC; 1352 if (args->arg & LINUX_FASYNC) 1353 arg |= O_ASYNC; 1354 #ifdef LINUX_O_NOFOLLOW 1355 if (args->arg & LINUX_O_NOFOLLOW) 1356 arg |= O_NOFOLLOW; 1357 #endif 1358 #ifdef LINUX_O_DIRECT 1359 if (args->arg & LINUX_O_DIRECT) 1360 arg |= O_DIRECT; 1361 #endif 1362 return (kern_fcntl(td, args->fd, F_SETFL, arg)); 1363 1364 case LINUX_F_GETLK: 1365 error = copyin((void *)args->arg, &linux_flock, 1366 sizeof(linux_flock)); 1367 if (error) 1368 return (error); 1369 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1370 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1371 if (error) 1372 return (error); 1373 bsd_to_linux_flock(&bsd_flock, &linux_flock); 1374 return (copyout(&linux_flock, (void *)args->arg, 1375 sizeof(linux_flock))); 1376 1377 case LINUX_F_SETLK: 1378 error = copyin((void *)args->arg, &linux_flock, 1379 sizeof(linux_flock)); 1380 if (error) 1381 return (error); 1382 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1383 return (kern_fcntl(td, args->fd, F_SETLK, 1384 (intptr_t)&bsd_flock)); 1385 1386 case LINUX_F_SETLKW: 1387 error = copyin((void *)args->arg, &linux_flock, 1388 sizeof(linux_flock)); 1389 if (error) 1390 return (error); 1391 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1392 return (kern_fcntl(td, args->fd, F_SETLKW, 1393 (intptr_t)&bsd_flock)); 1394 1395 case LINUX_F_GETOWN: 1396 return (kern_fcntl(td, args->fd, F_GETOWN, 0)); 1397 1398 case LINUX_F_SETOWN: 1399 /* 1400 * XXX some Linux applications depend on F_SETOWN having no 1401 * significant effect for pipes (SIGIO is not delivered for 1402 * pipes under Linux-2.2.35 at least). 1403 */ 1404 error = fget(td, args->fd, 1405 &cap_fcntl_rights, &fp); 1406 if (error) 1407 return (error); 1408 if (fp->f_type == DTYPE_PIPE) { 1409 fdrop(fp, td); 1410 return (EINVAL); 1411 } 1412 fdrop(fp, td); 1413 1414 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg)); 1415 1416 case LINUX_F_DUPFD_CLOEXEC: 1417 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg)); 1418 } 1419 1420 return (EINVAL); 1421 } 1422 1423 int 1424 linux_fcntl(struct thread *td, struct linux_fcntl_args *args) 1425 { 1426 1427 #ifdef DEBUG 1428 if (ldebug(fcntl)) 1429 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd); 1430 #endif 1431 1432 return (fcntl_common(td, args)); 1433 } 1434 1435 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1436 int 1437 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args) 1438 { 1439 struct l_flock64 linux_flock; 1440 struct flock bsd_flock; 1441 struct linux_fcntl_args fcntl_args; 1442 int error; 1443 1444 #ifdef DEBUG 1445 if (ldebug(fcntl64)) 1446 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd); 1447 #endif 1448 1449 switch (args->cmd) { 1450 case LINUX_F_GETLK64: 1451 error = copyin((void *)args->arg, &linux_flock, 1452 sizeof(linux_flock)); 1453 if (error) 1454 return (error); 1455 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1456 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1457 if (error) 1458 return (error); 1459 bsd_to_linux_flock64(&bsd_flock, &linux_flock); 1460 return (copyout(&linux_flock, (void *)args->arg, 1461 sizeof(linux_flock))); 1462 1463 case LINUX_F_SETLK64: 1464 error = copyin((void *)args->arg, &linux_flock, 1465 sizeof(linux_flock)); 1466 if (error) 1467 return (error); 1468 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1469 return (kern_fcntl(td, args->fd, F_SETLK, 1470 (intptr_t)&bsd_flock)); 1471 1472 case LINUX_F_SETLKW64: 1473 error = copyin((void *)args->arg, &linux_flock, 1474 sizeof(linux_flock)); 1475 if (error) 1476 return (error); 1477 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1478 return (kern_fcntl(td, args->fd, F_SETLKW, 1479 (intptr_t)&bsd_flock)); 1480 } 1481 1482 fcntl_args.fd = args->fd; 1483 fcntl_args.cmd = args->cmd; 1484 fcntl_args.arg = args->arg; 1485 return (fcntl_common(td, &fcntl_args)); 1486 } 1487 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1488 1489 #ifdef LINUX_LEGACY_SYSCALLS 1490 int 1491 linux_chown(struct thread *td, struct linux_chown_args *args) 1492 { 1493 char *path; 1494 int error; 1495 1496 LCONVPATHEXIST(td, args->path, &path); 1497 1498 #ifdef DEBUG 1499 if (ldebug(chown)) 1500 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid); 1501 #endif 1502 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1503 args->gid, 0); 1504 LFREEPATH(path); 1505 return (error); 1506 } 1507 #endif 1508 1509 int 1510 linux_fchownat(struct thread *td, struct linux_fchownat_args *args) 1511 { 1512 char *path; 1513 int error, dfd, flag; 1514 1515 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 1516 return (EINVAL); 1517 1518 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1519 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 1520 1521 #ifdef DEBUG 1522 if (ldebug(fchownat)) 1523 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid); 1524 #endif 1525 1526 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 1527 AT_SYMLINK_NOFOLLOW; 1528 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid, 1529 flag); 1530 LFREEPATH(path); 1531 return (error); 1532 } 1533 1534 #ifdef LINUX_LEGACY_SYSCALLS 1535 int 1536 linux_lchown(struct thread *td, struct linux_lchown_args *args) 1537 { 1538 char *path; 1539 int error; 1540 1541 LCONVPATHEXIST(td, args->path, &path); 1542 1543 #ifdef DEBUG 1544 if (ldebug(lchown)) 1545 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid); 1546 #endif 1547 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1548 args->gid, AT_SYMLINK_NOFOLLOW); 1549 LFREEPATH(path); 1550 return (error); 1551 } 1552 #endif 1553 1554 static int 1555 convert_fadvice(int advice) 1556 { 1557 switch (advice) { 1558 case LINUX_POSIX_FADV_NORMAL: 1559 return (POSIX_FADV_NORMAL); 1560 case LINUX_POSIX_FADV_RANDOM: 1561 return (POSIX_FADV_RANDOM); 1562 case LINUX_POSIX_FADV_SEQUENTIAL: 1563 return (POSIX_FADV_SEQUENTIAL); 1564 case LINUX_POSIX_FADV_WILLNEED: 1565 return (POSIX_FADV_WILLNEED); 1566 case LINUX_POSIX_FADV_DONTNEED: 1567 return (POSIX_FADV_DONTNEED); 1568 case LINUX_POSIX_FADV_NOREUSE: 1569 return (POSIX_FADV_NOREUSE); 1570 default: 1571 return (-1); 1572 } 1573 } 1574 1575 int 1576 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args) 1577 { 1578 int advice; 1579 1580 advice = convert_fadvice(args->advice); 1581 if (advice == -1) 1582 return (EINVAL); 1583 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1584 advice)); 1585 } 1586 1587 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1588 int 1589 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args) 1590 { 1591 int advice; 1592 1593 advice = convert_fadvice(args->advice); 1594 if (advice == -1) 1595 return (EINVAL); 1596 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1597 advice)); 1598 } 1599 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1600 1601 #ifdef LINUX_LEGACY_SYSCALLS 1602 int 1603 linux_pipe(struct thread *td, struct linux_pipe_args *args) 1604 { 1605 int fildes[2]; 1606 int error; 1607 1608 #ifdef DEBUG 1609 if (ldebug(pipe)) 1610 printf(ARGS(pipe, "*")); 1611 #endif 1612 1613 error = kern_pipe(td, fildes, 0, NULL, NULL); 1614 if (error != 0) 1615 return (error); 1616 1617 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1618 if (error != 0) { 1619 (void)kern_close(td, fildes[0]); 1620 (void)kern_close(td, fildes[1]); 1621 } 1622 1623 return (error); 1624 } 1625 #endif 1626 1627 int 1628 linux_pipe2(struct thread *td, struct linux_pipe2_args *args) 1629 { 1630 int fildes[2]; 1631 int error, flags; 1632 1633 #ifdef DEBUG 1634 if (ldebug(pipe2)) 1635 printf(ARGS(pipe2, "*, %d"), args->flags); 1636 #endif 1637 1638 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0) 1639 return (EINVAL); 1640 1641 flags = 0; 1642 if ((args->flags & LINUX_O_NONBLOCK) != 0) 1643 flags |= O_NONBLOCK; 1644 if ((args->flags & LINUX_O_CLOEXEC) != 0) 1645 flags |= O_CLOEXEC; 1646 error = kern_pipe(td, fildes, flags, NULL, NULL); 1647 if (error != 0) 1648 return (error); 1649 1650 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1651 if (error != 0) { 1652 (void)kern_close(td, fildes[0]); 1653 (void)kern_close(td, fildes[1]); 1654 } 1655 1656 return (error); 1657 } 1658 1659 int 1660 linux_dup3(struct thread *td, struct linux_dup3_args *args) 1661 { 1662 int cmd; 1663 intptr_t newfd; 1664 1665 if (args->oldfd == args->newfd) 1666 return (EINVAL); 1667 if ((args->flags & ~LINUX_O_CLOEXEC) != 0) 1668 return (EINVAL); 1669 if (args->flags & LINUX_O_CLOEXEC) 1670 cmd = F_DUP2FD_CLOEXEC; 1671 else 1672 cmd = F_DUP2FD; 1673 1674 newfd = args->newfd; 1675 return (kern_fcntl(td, args->oldfd, cmd, newfd)); 1676 } 1677 1678 int 1679 linux_fallocate(struct thread *td, struct linux_fallocate_args *args) 1680 { 1681 1682 /* 1683 * We emulate only posix_fallocate system call for which 1684 * mode should be 0. 1685 */ 1686 if (args->mode != 0) 1687 return (ENOSYS); 1688 1689 return (kern_posix_fallocate(td, args->fd, args->offset, 1690 args->len)); 1691 } 1692