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 <compat/freebsd32/freebsd32_misc.h> 58 #include <machine/../linux32/linux.h> 59 #include <machine/../linux32/linux32_proto.h> 60 #else 61 #include <machine/../linux/linux.h> 62 #include <machine/../linux/linux_proto.h> 63 #endif 64 #include <compat/linux/linux_misc.h> 65 #include <compat/linux/linux_util.h> 66 #include <compat/linux/linux_file.h> 67 68 static int linux_common_open(struct thread *, int, char *, int, int); 69 static int linux_getdents_error(struct thread *, int, int); 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 80 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, 81 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 82 LFREEPATH(path); 83 return (error); 84 } 85 #endif 86 87 static int 88 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode) 89 { 90 struct proc *p = td->td_proc; 91 struct file *fp; 92 int fd; 93 int bsd_flags, error; 94 95 bsd_flags = 0; 96 switch (l_flags & LINUX_O_ACCMODE) { 97 case LINUX_O_WRONLY: 98 bsd_flags |= O_WRONLY; 99 break; 100 case LINUX_O_RDWR: 101 bsd_flags |= O_RDWR; 102 break; 103 default: 104 bsd_flags |= O_RDONLY; 105 } 106 if (l_flags & LINUX_O_NDELAY) 107 bsd_flags |= O_NONBLOCK; 108 if (l_flags & LINUX_O_APPEND) 109 bsd_flags |= O_APPEND; 110 if (l_flags & LINUX_O_SYNC) 111 bsd_flags |= O_FSYNC; 112 if (l_flags & LINUX_O_CLOEXEC) 113 bsd_flags |= O_CLOEXEC; 114 if (l_flags & LINUX_O_NONBLOCK) 115 bsd_flags |= O_NONBLOCK; 116 if (l_flags & LINUX_FASYNC) 117 bsd_flags |= O_ASYNC; 118 if (l_flags & LINUX_O_CREAT) 119 bsd_flags |= O_CREAT; 120 if (l_flags & LINUX_O_TRUNC) 121 bsd_flags |= O_TRUNC; 122 if (l_flags & LINUX_O_EXCL) 123 bsd_flags |= O_EXCL; 124 if (l_flags & LINUX_O_NOCTTY) 125 bsd_flags |= O_NOCTTY; 126 if (l_flags & LINUX_O_DIRECT) 127 bsd_flags |= O_DIRECT; 128 if (l_flags & LINUX_O_NOFOLLOW) 129 bsd_flags |= O_NOFOLLOW; 130 if (l_flags & LINUX_O_DIRECTORY) 131 bsd_flags |= O_DIRECTORY; 132 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */ 133 134 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode); 135 if (error != 0) { 136 if (error == EMLINK) 137 error = ELOOP; 138 goto done; 139 } 140 if (p->p_flag & P_CONTROLT) 141 goto done; 142 if (bsd_flags & O_NOCTTY) 143 goto done; 144 145 /* 146 * XXX In between kern_openat() and fget(), another process 147 * having the same filedesc could use that fd without 148 * checking below. 149 */ 150 fd = td->td_retval[0]; 151 if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) { 152 if (fp->f_type != DTYPE_VNODE) { 153 fdrop(fp, td); 154 goto done; 155 } 156 sx_slock(&proctree_lock); 157 PROC_LOCK(p); 158 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 159 PROC_UNLOCK(p); 160 sx_sunlock(&proctree_lock); 161 /* XXXPJD: Verify if TIOCSCTTY is allowed. */ 162 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, 163 td->td_ucred, td); 164 } else { 165 PROC_UNLOCK(p); 166 sx_sunlock(&proctree_lock); 167 } 168 fdrop(fp, td); 169 } 170 171 done: 172 LFREEPATH(path); 173 return (error); 174 } 175 176 int 177 linux_openat(struct thread *td, struct linux_openat_args *args) 178 { 179 char *path; 180 int dfd; 181 182 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 183 if (args->flags & LINUX_O_CREAT) 184 LCONVPATH_AT(td, args->filename, &path, 1, dfd); 185 else 186 LCONVPATH_AT(td, args->filename, &path, 0, dfd); 187 188 return (linux_common_open(td, dfd, path, args->flags, args->mode)); 189 } 190 191 #ifdef LINUX_LEGACY_SYSCALLS 192 int 193 linux_open(struct thread *td, struct linux_open_args *args) 194 { 195 char *path; 196 197 if (args->flags & LINUX_O_CREAT) 198 LCONVPATHCREAT(td, args->path, &path); 199 else 200 LCONVPATHEXIST(td, args->path, &path); 201 202 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode)); 203 } 204 #endif 205 206 int 207 linux_lseek(struct thread *td, struct linux_lseek_args *args) 208 { 209 210 return (kern_lseek(td, args->fdes, args->off, args->whence)); 211 } 212 213 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 214 int 215 linux_llseek(struct thread *td, struct linux_llseek_args *args) 216 { 217 int error; 218 off_t off; 219 220 off = (args->olow) | (((off_t) args->ohigh) << 32); 221 222 error = kern_lseek(td, args->fd, off, args->whence); 223 if (error != 0) 224 return (error); 225 226 error = copyout(td->td_retval, args->res, sizeof(off_t)); 227 if (error != 0) 228 return (error); 229 230 td->td_retval[0] = 0; 231 return (0); 232 } 233 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 234 235 /* 236 * Note that linux_getdents(2) and linux_getdents64(2) have the same 237 * arguments. They only differ in the definition of struct dirent they 238 * operate on. 239 * Note that linux_readdir(2) is a special case of linux_getdents(2) 240 * where count is always equals 1, meaning that the buffer is one 241 * dirent-structure in size and that the code can't handle more anyway. 242 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2) 243 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will 244 * trash user stack. 245 */ 246 247 static int 248 linux_getdents_error(struct thread *td, int fd, int err) 249 { 250 struct vnode *vp; 251 struct file *fp; 252 int error; 253 254 /* Linux return ENOTDIR in case when fd is not a directory. */ 255 error = getvnode(td, fd, &cap_read_rights, &fp); 256 if (error != 0) 257 return (error); 258 vp = fp->f_vnode; 259 if (vp->v_type != VDIR) { 260 fdrop(fp, td); 261 return (ENOTDIR); 262 } 263 fdrop(fp, td); 264 return (err); 265 } 266 267 struct l_dirent { 268 l_ulong d_ino; 269 l_off_t d_off; 270 l_ushort d_reclen; 271 char d_name[LINUX_NAME_MAX + 1]; 272 }; 273 274 struct l_dirent64 { 275 uint64_t d_ino; 276 int64_t d_off; 277 l_ushort d_reclen; 278 u_char d_type; 279 char d_name[LINUX_NAME_MAX + 1]; 280 }; 281 282 /* 283 * Linux uses the last byte in the dirent buffer to store d_type, 284 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes. 285 */ 286 #define LINUX_RECLEN(namlen) \ 287 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong)) 288 289 #define LINUX_RECLEN64(namlen) \ 290 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \ 291 sizeof(uint64_t)) 292 293 #ifdef LINUX_LEGACY_SYSCALLS 294 int 295 linux_getdents(struct thread *td, struct linux_getdents_args *args) 296 { 297 struct dirent *bdp; 298 caddr_t inp, buf; /* BSD-format */ 299 int len, reclen; /* BSD-format */ 300 caddr_t outp; /* Linux-format */ 301 int resid, linuxreclen; /* Linux-format */ 302 caddr_t lbuf; /* Linux-format */ 303 off_t base; 304 struct l_dirent *linux_dirent; 305 int buflen, error; 306 size_t retval; 307 308 buflen = min(args->count, MAXBSIZE); 309 buf = malloc(buflen, M_TEMP, M_WAITOK); 310 311 error = kern_getdirentries(td, args->fd, buf, buflen, 312 &base, NULL, UIO_SYSSPACE); 313 if (error != 0) { 314 error = linux_getdents_error(td, args->fd, error); 315 goto out1; 316 } 317 318 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 319 320 len = td->td_retval[0]; 321 inp = buf; 322 outp = (caddr_t)args->dent; 323 resid = args->count; 324 retval = 0; 325 326 while (len > 0) { 327 bdp = (struct dirent *) inp; 328 reclen = bdp->d_reclen; 329 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 330 /* 331 * No more space in the user supplied dirent buffer. 332 * Return EINVAL. 333 */ 334 if (resid < linuxreclen) { 335 error = EINVAL; 336 goto out; 337 } 338 339 linux_dirent = (struct l_dirent*)lbuf; 340 linux_dirent->d_ino = bdp->d_fileno; 341 linux_dirent->d_off = base + reclen; 342 linux_dirent->d_reclen = linuxreclen; 343 /* 344 * Copy d_type to last byte of l_dirent buffer 345 */ 346 lbuf[linuxreclen - 1] = bdp->d_type; 347 strlcpy(linux_dirent->d_name, bdp->d_name, 348 linuxreclen - offsetof(struct l_dirent, d_name)-1); 349 error = copyout(linux_dirent, outp, linuxreclen); 350 if (error != 0) 351 goto out; 352 353 inp += reclen; 354 base += reclen; 355 len -= reclen; 356 357 retval += linuxreclen; 358 outp += linuxreclen; 359 resid -= linuxreclen; 360 } 361 td->td_retval[0] = retval; 362 363 out: 364 free(lbuf, M_TEMP); 365 out1: 366 free(buf, M_TEMP); 367 return (error); 368 } 369 #endif 370 371 int 372 linux_getdents64(struct thread *td, struct linux_getdents64_args *args) 373 { 374 struct dirent *bdp; 375 caddr_t inp, buf; /* BSD-format */ 376 int len, reclen; /* BSD-format */ 377 caddr_t outp; /* Linux-format */ 378 int resid, linuxreclen; /* Linux-format */ 379 caddr_t lbuf; /* Linux-format */ 380 off_t base; 381 struct l_dirent64 *linux_dirent64; 382 int buflen, error; 383 size_t retval; 384 385 buflen = min(args->count, MAXBSIZE); 386 buf = malloc(buflen, M_TEMP, M_WAITOK); 387 388 error = kern_getdirentries(td, args->fd, buf, buflen, 389 &base, NULL, UIO_SYSSPACE); 390 if (error != 0) { 391 error = linux_getdents_error(td, args->fd, error); 392 goto out1; 393 } 394 395 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 396 397 len = td->td_retval[0]; 398 inp = buf; 399 outp = (caddr_t)args->dirent; 400 resid = args->count; 401 retval = 0; 402 403 while (len > 0) { 404 bdp = (struct dirent *) inp; 405 reclen = bdp->d_reclen; 406 linuxreclen = LINUX_RECLEN64(bdp->d_namlen); 407 /* 408 * No more space in the user supplied dirent buffer. 409 * Return EINVAL. 410 */ 411 if (resid < linuxreclen) { 412 error = EINVAL; 413 goto out; 414 } 415 416 linux_dirent64 = (struct l_dirent64*)lbuf; 417 linux_dirent64->d_ino = bdp->d_fileno; 418 linux_dirent64->d_off = base + reclen; 419 linux_dirent64->d_reclen = linuxreclen; 420 linux_dirent64->d_type = bdp->d_type; 421 strlcpy(linux_dirent64->d_name, bdp->d_name, 422 linuxreclen - offsetof(struct l_dirent64, d_name)); 423 error = copyout(linux_dirent64, outp, linuxreclen); 424 if (error != 0) 425 goto out; 426 427 inp += reclen; 428 base += reclen; 429 len -= reclen; 430 431 retval += linuxreclen; 432 outp += linuxreclen; 433 resid -= linuxreclen; 434 } 435 td->td_retval[0] = retval; 436 437 out: 438 free(lbuf, M_TEMP); 439 out1: 440 free(buf, M_TEMP); 441 return (error); 442 } 443 444 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 445 int 446 linux_readdir(struct thread *td, struct linux_readdir_args *args) 447 { 448 struct dirent *bdp; 449 caddr_t buf; /* BSD-format */ 450 int linuxreclen; /* Linux-format */ 451 caddr_t lbuf; /* Linux-format */ 452 off_t base; 453 struct l_dirent *linux_dirent; 454 int buflen, error; 455 456 buflen = LINUX_RECLEN(LINUX_NAME_MAX); 457 buf = malloc(buflen, M_TEMP, M_WAITOK); 458 459 error = kern_getdirentries(td, args->fd, buf, buflen, 460 &base, NULL, UIO_SYSSPACE); 461 if (error != 0) { 462 error = linux_getdents_error(td, args->fd, error); 463 goto out; 464 } 465 if (td->td_retval[0] == 0) 466 goto out; 467 468 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 469 470 bdp = (struct dirent *) buf; 471 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 472 473 linux_dirent = (struct l_dirent*)lbuf; 474 linux_dirent->d_ino = bdp->d_fileno; 475 linux_dirent->d_off = linuxreclen; 476 linux_dirent->d_reclen = bdp->d_namlen; 477 strlcpy(linux_dirent->d_name, bdp->d_name, 478 linuxreclen - offsetof(struct l_dirent, d_name)); 479 error = copyout(linux_dirent, args->dent, linuxreclen); 480 if (error == 0) 481 td->td_retval[0] = linuxreclen; 482 483 free(lbuf, M_TEMP); 484 out: 485 free(buf, M_TEMP); 486 return (error); 487 } 488 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 489 490 491 /* 492 * These exist mainly for hooks for doing /compat/linux translation. 493 */ 494 495 #ifdef LINUX_LEGACY_SYSCALLS 496 int 497 linux_access(struct thread *td, struct linux_access_args *args) 498 { 499 char *path; 500 int error; 501 502 /* Linux convention. */ 503 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 504 return (EINVAL); 505 506 LCONVPATHEXIST(td, args->path, &path); 507 508 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0, 509 args->amode); 510 LFREEPATH(path); 511 512 return (error); 513 } 514 #endif 515 516 int 517 linux_faccessat(struct thread *td, struct linux_faccessat_args *args) 518 { 519 char *path; 520 int error, dfd; 521 522 /* Linux convention. */ 523 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 524 return (EINVAL); 525 526 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 527 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 528 529 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode); 530 LFREEPATH(path); 531 532 return (error); 533 } 534 535 #ifdef LINUX_LEGACY_SYSCALLS 536 int 537 linux_unlink(struct thread *td, struct linux_unlink_args *args) 538 { 539 char *path; 540 int error; 541 struct stat st; 542 543 LCONVPATHEXIST(td, args->path, &path); 544 545 error = kern_funlinkat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0, 0); 546 if (error == EPERM) { 547 /* Introduce POSIX noncompliant behaviour of Linux */ 548 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st, 549 NULL) == 0) { 550 if (S_ISDIR(st.st_mode)) 551 error = EISDIR; 552 } 553 } 554 LFREEPATH(path); 555 return (error); 556 } 557 #endif 558 559 int 560 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args) 561 { 562 char *path; 563 int error, dfd; 564 struct stat st; 565 566 if (args->flag & ~LINUX_AT_REMOVEDIR) 567 return (EINVAL); 568 569 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 570 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 571 572 if (args->flag & LINUX_AT_REMOVEDIR) 573 error = kern_frmdirat(td, dfd, path, FD_NONE, UIO_SYSSPACE, 0); 574 else 575 error = kern_funlinkat(td, dfd, path, FD_NONE, UIO_SYSSPACE, 0, 576 0); 577 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) { 578 /* Introduce POSIX noncompliant behaviour of Linux */ 579 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path, 580 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode)) 581 error = EISDIR; 582 } 583 LFREEPATH(path); 584 return (error); 585 } 586 int 587 linux_chdir(struct thread *td, struct linux_chdir_args *args) 588 { 589 char *path; 590 int error; 591 592 LCONVPATHEXIST(td, args->path, &path); 593 594 error = kern_chdir(td, path, UIO_SYSSPACE); 595 LFREEPATH(path); 596 return (error); 597 } 598 599 #ifdef LINUX_LEGACY_SYSCALLS 600 int 601 linux_chmod(struct thread *td, struct linux_chmod_args *args) 602 { 603 char *path; 604 int error; 605 606 LCONVPATHEXIST(td, args->path, &path); 607 608 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE, 609 args->mode, 0); 610 LFREEPATH(path); 611 return (error); 612 } 613 #endif 614 615 int 616 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args) 617 { 618 char *path; 619 int error, dfd; 620 621 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 622 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 623 624 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0); 625 LFREEPATH(path); 626 return (error); 627 } 628 629 #ifdef LINUX_LEGACY_SYSCALLS 630 int 631 linux_mkdir(struct thread *td, struct linux_mkdir_args *args) 632 { 633 char *path; 634 int error; 635 636 LCONVPATHCREAT(td, args->path, &path); 637 638 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode); 639 LFREEPATH(path); 640 return (error); 641 } 642 #endif 643 644 int 645 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args) 646 { 647 char *path; 648 int error, dfd; 649 650 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 651 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd); 652 653 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode); 654 LFREEPATH(path); 655 return (error); 656 } 657 658 #ifdef LINUX_LEGACY_SYSCALLS 659 int 660 linux_rmdir(struct thread *td, struct linux_rmdir_args *args) 661 { 662 char *path; 663 int error; 664 665 LCONVPATHEXIST(td, args->path, &path); 666 667 error = kern_frmdirat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0); 668 LFREEPATH(path); 669 return (error); 670 } 671 672 int 673 linux_rename(struct thread *td, struct linux_rename_args *args) 674 { 675 char *from, *to; 676 int error; 677 678 LCONVPATHEXIST(td, args->from, &from); 679 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 680 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 681 if (to == NULL) { 682 LFREEPATH(from); 683 return (error); 684 } 685 686 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE); 687 LFREEPATH(from); 688 LFREEPATH(to); 689 return (error); 690 } 691 #endif 692 693 int 694 linux_renameat(struct thread *td, struct linux_renameat_args *args) 695 { 696 struct linux_renameat2_args renameat2_args = { 697 .olddfd = args->olddfd, 698 .oldname = args->oldname, 699 .newdfd = args->newdfd, 700 .newname = args->newname, 701 .flags = 0 702 }; 703 704 return (linux_renameat2(td, &renameat2_args)); 705 } 706 707 int 708 linux_renameat2(struct thread *td, struct linux_renameat2_args *args) 709 { 710 char *from, *to; 711 int error, olddfd, newdfd; 712 713 if (args->flags != 0) { 714 if (args->flags & ~(LINUX_RENAME_EXCHANGE | 715 LINUX_RENAME_NOREPLACE | LINUX_RENAME_WHITEOUT)) 716 return (EINVAL); 717 if (args->flags & LINUX_RENAME_EXCHANGE && 718 args->flags & (LINUX_RENAME_NOREPLACE | 719 LINUX_RENAME_WHITEOUT)) 720 return (EINVAL); 721 linux_msg(td, "renameat2 unsupported flags 0x%x", 722 args->flags); 723 return (EINVAL); 724 } 725 726 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 727 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 728 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd); 729 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 730 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 731 if (to == NULL) { 732 LFREEPATH(from); 733 return (error); 734 } 735 736 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE); 737 LFREEPATH(from); 738 LFREEPATH(to); 739 return (error); 740 } 741 742 #ifdef LINUX_LEGACY_SYSCALLS 743 int 744 linux_symlink(struct thread *td, struct linux_symlink_args *args) 745 { 746 char *path, *to; 747 int error; 748 749 LCONVPATHEXIST(td, args->path, &path); 750 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 751 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 752 if (to == NULL) { 753 LFREEPATH(path); 754 return (error); 755 } 756 757 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE); 758 LFREEPATH(path); 759 LFREEPATH(to); 760 return (error); 761 } 762 #endif 763 764 int 765 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args) 766 { 767 char *path, *to; 768 int error, dfd; 769 770 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 771 LCONVPATHEXIST(td, args->oldname, &path); 772 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 773 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd); 774 if (to == NULL) { 775 LFREEPATH(path); 776 return (error); 777 } 778 779 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE); 780 LFREEPATH(path); 781 LFREEPATH(to); 782 return (error); 783 } 784 785 #ifdef LINUX_LEGACY_SYSCALLS 786 int 787 linux_readlink(struct thread *td, struct linux_readlink_args *args) 788 { 789 char *name; 790 int error; 791 792 LCONVPATHEXIST(td, args->name, &name); 793 794 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE, 795 args->buf, UIO_USERSPACE, args->count); 796 LFREEPATH(name); 797 return (error); 798 } 799 #endif 800 801 int 802 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args) 803 { 804 char *name; 805 int error, dfd; 806 807 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 808 LCONVPATHEXIST_AT(td, args->path, &name, dfd); 809 810 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf, 811 UIO_USERSPACE, args->bufsiz); 812 LFREEPATH(name); 813 return (error); 814 } 815 816 int 817 linux_truncate(struct thread *td, struct linux_truncate_args *args) 818 { 819 char *path; 820 int error; 821 822 LCONVPATHEXIST(td, args->path, &path); 823 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 824 LFREEPATH(path); 825 return (error); 826 } 827 828 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 829 int 830 linux_truncate64(struct thread *td, struct linux_truncate64_args *args) 831 { 832 char *path; 833 off_t length; 834 int error; 835 836 #if defined(__amd64__) && defined(COMPAT_LINUX32) 837 length = PAIR32TO64(off_t, args->length); 838 #else 839 length = args->length; 840 #endif 841 842 LCONVPATHEXIST(td, args->path, &path); 843 error = kern_truncate(td, path, UIO_SYSSPACE, length); 844 LFREEPATH(path); 845 return (error); 846 } 847 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 848 849 int 850 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args) 851 { 852 853 return (kern_ftruncate(td, args->fd, args->length)); 854 } 855 856 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 857 int 858 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 859 { 860 off_t length; 861 862 #if defined(__amd64__) && defined(COMPAT_LINUX32) 863 length = PAIR32TO64(off_t, args->length); 864 #else 865 length = args->length; 866 #endif 867 868 return (kern_ftruncate(td, args->fd, length)); 869 } 870 #endif 871 872 #ifdef LINUX_LEGACY_SYSCALLS 873 int 874 linux_link(struct thread *td, struct linux_link_args *args) 875 { 876 char *path, *to; 877 int error; 878 879 LCONVPATHEXIST(td, args->path, &path); 880 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 881 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 882 if (to == NULL) { 883 LFREEPATH(path); 884 return (error); 885 } 886 887 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE, 888 FOLLOW); 889 LFREEPATH(path); 890 LFREEPATH(to); 891 return (error); 892 } 893 #endif 894 895 int 896 linux_linkat(struct thread *td, struct linux_linkat_args *args) 897 { 898 char *path, *to; 899 int error, olddfd, newdfd, follow; 900 901 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW) 902 return (EINVAL); 903 904 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 905 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 906 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd); 907 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 908 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 909 if (to == NULL) { 910 LFREEPATH(path); 911 return (error); 912 } 913 914 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW : 915 FOLLOW; 916 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow); 917 LFREEPATH(path); 918 LFREEPATH(to); 919 return (error); 920 } 921 922 int 923 linux_fdatasync(struct thread *td, struct linux_fdatasync_args *uap) 924 { 925 926 return (kern_fsync(td, uap->fd, false)); 927 } 928 929 int 930 linux_sync_file_range(struct thread *td, struct linux_sync_file_range_args *uap) 931 { 932 off_t nbytes, offset; 933 934 #if defined(__amd64__) && defined(COMPAT_LINUX32) 935 nbytes = PAIR32TO64(off_t, uap->nbytes); 936 offset = PAIR32TO64(off_t, uap->offset); 937 #else 938 nbytes = uap->nbytes; 939 offset = uap->offset; 940 #endif 941 942 if (offset < 0 || nbytes < 0 || 943 (uap->flags & ~(LINUX_SYNC_FILE_RANGE_WAIT_BEFORE | 944 LINUX_SYNC_FILE_RANGE_WRITE | 945 LINUX_SYNC_FILE_RANGE_WAIT_AFTER)) != 0) { 946 return (EINVAL); 947 } 948 949 return (kern_fsync(td, uap->fd, false)); 950 } 951 952 int 953 linux_pread(struct thread *td, struct linux_pread_args *uap) 954 { 955 struct vnode *vp; 956 off_t offset; 957 int error; 958 959 #if defined(__amd64__) && defined(COMPAT_LINUX32) 960 offset = PAIR32TO64(off_t, uap->offset); 961 #else 962 offset = uap->offset; 963 #endif 964 965 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, offset); 966 if (error == 0) { 967 /* This seems to violate POSIX but Linux does it. */ 968 error = fgetvp(td, uap->fd, &cap_pread_rights, &vp); 969 if (error != 0) 970 return (error); 971 if (vp->v_type == VDIR) 972 error = EISDIR; 973 vrele(vp); 974 } 975 return (error); 976 } 977 978 int 979 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap) 980 { 981 off_t offset; 982 983 #if defined(__amd64__) && defined(COMPAT_LINUX32) 984 offset = PAIR32TO64(off_t, uap->offset); 985 #else 986 offset = uap->offset; 987 #endif 988 989 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, offset)); 990 } 991 992 int 993 linux_preadv(struct thread *td, struct linux_preadv_args *uap) 994 { 995 struct uio *auio; 996 int error; 997 off_t offset; 998 999 /* 1000 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES 1001 * pos_l and pos_h, respectively, contain the 1002 * low order and high order 32 bits of offset. 1003 */ 1004 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1005 (sizeof(offset) * 4)) | uap->pos_l; 1006 if (offset < 0) 1007 return (EINVAL); 1008 #ifdef COMPAT_LINUX32 1009 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1010 #else 1011 error = copyinuio(uap->vec, uap->vlen, &auio); 1012 #endif 1013 if (error != 0) 1014 return (error); 1015 error = kern_preadv(td, uap->fd, auio, offset); 1016 free(auio, M_IOV); 1017 return (error); 1018 } 1019 1020 int 1021 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap) 1022 { 1023 struct uio *auio; 1024 int error; 1025 off_t offset; 1026 1027 /* 1028 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES 1029 * pos_l and pos_h, respectively, contain the 1030 * low order and high order 32 bits of offset. 1031 */ 1032 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1033 (sizeof(offset) * 4)) | uap->pos_l; 1034 if (offset < 0) 1035 return (EINVAL); 1036 #ifdef COMPAT_LINUX32 1037 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1038 #else 1039 error = copyinuio(uap->vec, uap->vlen, &auio); 1040 #endif 1041 if (error != 0) 1042 return (error); 1043 error = kern_pwritev(td, uap->fd, auio, offset); 1044 free(auio, M_IOV); 1045 return (error); 1046 } 1047 1048 int 1049 linux_mount(struct thread *td, struct linux_mount_args *args) 1050 { 1051 char fstypename[MFSNAMELEN]; 1052 char *mntonname, *mntfromname; 1053 int error, fsflags; 1054 1055 mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1056 mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1057 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1, 1058 NULL); 1059 if (error != 0) 1060 goto out; 1061 if (args->specialfile != NULL) { 1062 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL); 1063 if (error != 0) 1064 goto out; 1065 } else { 1066 mntfromname[0] = '\0'; 1067 } 1068 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL); 1069 if (error != 0) 1070 goto out; 1071 1072 if (strcmp(fstypename, "ext2") == 0) { 1073 strcpy(fstypename, "ext2fs"); 1074 } else if (strcmp(fstypename, "proc") == 0) { 1075 strcpy(fstypename, "linprocfs"); 1076 } else if (strcmp(fstypename, "vfat") == 0) { 1077 strcpy(fstypename, "msdosfs"); 1078 } 1079 1080 fsflags = 0; 1081 1082 /* 1083 * Linux SYNC flag is not included; the closest equivalent 1084 * FreeBSD has is !ASYNC, which is our default. 1085 */ 1086 if (args->rwflag & LINUX_MS_RDONLY) 1087 fsflags |= MNT_RDONLY; 1088 if (args->rwflag & LINUX_MS_NOSUID) 1089 fsflags |= MNT_NOSUID; 1090 if (args->rwflag & LINUX_MS_NOEXEC) 1091 fsflags |= MNT_NOEXEC; 1092 if (args->rwflag & LINUX_MS_REMOUNT) 1093 fsflags |= MNT_UPDATE; 1094 1095 error = kernel_vmount(fsflags, 1096 "fstype", fstypename, 1097 "fspath", mntonname, 1098 "from", mntfromname, 1099 NULL); 1100 out: 1101 free(mntonname, M_TEMP); 1102 free(mntfromname, M_TEMP); 1103 return (error); 1104 } 1105 1106 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1107 int 1108 linux_oldumount(struct thread *td, struct linux_oldumount_args *args) 1109 { 1110 1111 return (kern_unmount(td, args->path, 0)); 1112 } 1113 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1114 1115 #ifdef LINUX_LEGACY_SYSCALLS 1116 int 1117 linux_umount(struct thread *td, struct linux_umount_args *args) 1118 { 1119 int flags; 1120 1121 flags = 0; 1122 if ((args->flags & LINUX_MNT_FORCE) != 0) { 1123 args->flags &= ~LINUX_MNT_FORCE; 1124 flags |= MNT_FORCE; 1125 } 1126 if (args->flags != 0) { 1127 linux_msg(td, "unsupported umount2 flags %#x", args->flags); 1128 return (EINVAL); 1129 } 1130 1131 return (kern_unmount(td, args->path, flags)); 1132 } 1133 #endif 1134 1135 /* 1136 * fcntl family of syscalls 1137 */ 1138 1139 struct l_flock { 1140 l_short l_type; 1141 l_short l_whence; 1142 l_off_t l_start; 1143 l_off_t l_len; 1144 l_pid_t l_pid; 1145 } 1146 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1147 __packed 1148 #endif 1149 ; 1150 1151 static void 1152 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock) 1153 { 1154 switch (linux_flock->l_type) { 1155 case LINUX_F_RDLCK: 1156 bsd_flock->l_type = F_RDLCK; 1157 break; 1158 case LINUX_F_WRLCK: 1159 bsd_flock->l_type = F_WRLCK; 1160 break; 1161 case LINUX_F_UNLCK: 1162 bsd_flock->l_type = F_UNLCK; 1163 break; 1164 default: 1165 bsd_flock->l_type = -1; 1166 break; 1167 } 1168 bsd_flock->l_whence = linux_flock->l_whence; 1169 bsd_flock->l_start = (off_t)linux_flock->l_start; 1170 bsd_flock->l_len = (off_t)linux_flock->l_len; 1171 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1172 bsd_flock->l_sysid = 0; 1173 } 1174 1175 static void 1176 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock) 1177 { 1178 switch (bsd_flock->l_type) { 1179 case F_RDLCK: 1180 linux_flock->l_type = LINUX_F_RDLCK; 1181 break; 1182 case F_WRLCK: 1183 linux_flock->l_type = LINUX_F_WRLCK; 1184 break; 1185 case F_UNLCK: 1186 linux_flock->l_type = LINUX_F_UNLCK; 1187 break; 1188 } 1189 linux_flock->l_whence = bsd_flock->l_whence; 1190 linux_flock->l_start = (l_off_t)bsd_flock->l_start; 1191 linux_flock->l_len = (l_off_t)bsd_flock->l_len; 1192 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1193 } 1194 1195 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1196 struct l_flock64 { 1197 l_short l_type; 1198 l_short l_whence; 1199 l_loff_t l_start; 1200 l_loff_t l_len; 1201 l_pid_t l_pid; 1202 } 1203 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1204 __packed 1205 #endif 1206 ; 1207 1208 static void 1209 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock) 1210 { 1211 switch (linux_flock->l_type) { 1212 case LINUX_F_RDLCK: 1213 bsd_flock->l_type = F_RDLCK; 1214 break; 1215 case LINUX_F_WRLCK: 1216 bsd_flock->l_type = F_WRLCK; 1217 break; 1218 case LINUX_F_UNLCK: 1219 bsd_flock->l_type = F_UNLCK; 1220 break; 1221 default: 1222 bsd_flock->l_type = -1; 1223 break; 1224 } 1225 bsd_flock->l_whence = linux_flock->l_whence; 1226 bsd_flock->l_start = (off_t)linux_flock->l_start; 1227 bsd_flock->l_len = (off_t)linux_flock->l_len; 1228 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1229 bsd_flock->l_sysid = 0; 1230 } 1231 1232 static void 1233 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock) 1234 { 1235 switch (bsd_flock->l_type) { 1236 case F_RDLCK: 1237 linux_flock->l_type = LINUX_F_RDLCK; 1238 break; 1239 case F_WRLCK: 1240 linux_flock->l_type = LINUX_F_WRLCK; 1241 break; 1242 case F_UNLCK: 1243 linux_flock->l_type = LINUX_F_UNLCK; 1244 break; 1245 } 1246 linux_flock->l_whence = bsd_flock->l_whence; 1247 linux_flock->l_start = (l_loff_t)bsd_flock->l_start; 1248 linux_flock->l_len = (l_loff_t)bsd_flock->l_len; 1249 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1250 } 1251 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1252 1253 static int 1254 fcntl_common(struct thread *td, struct linux_fcntl_args *args) 1255 { 1256 struct l_flock linux_flock; 1257 struct flock bsd_flock; 1258 struct file *fp; 1259 long arg; 1260 int error, result; 1261 1262 switch (args->cmd) { 1263 case LINUX_F_DUPFD: 1264 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg)); 1265 1266 case LINUX_F_GETFD: 1267 return (kern_fcntl(td, args->fd, F_GETFD, 0)); 1268 1269 case LINUX_F_SETFD: 1270 return (kern_fcntl(td, args->fd, F_SETFD, args->arg)); 1271 1272 case LINUX_F_GETFL: 1273 error = kern_fcntl(td, args->fd, F_GETFL, 0); 1274 result = td->td_retval[0]; 1275 td->td_retval[0] = 0; 1276 if (result & O_RDONLY) 1277 td->td_retval[0] |= LINUX_O_RDONLY; 1278 if (result & O_WRONLY) 1279 td->td_retval[0] |= LINUX_O_WRONLY; 1280 if (result & O_RDWR) 1281 td->td_retval[0] |= LINUX_O_RDWR; 1282 if (result & O_NDELAY) 1283 td->td_retval[0] |= LINUX_O_NONBLOCK; 1284 if (result & O_APPEND) 1285 td->td_retval[0] |= LINUX_O_APPEND; 1286 if (result & O_FSYNC) 1287 td->td_retval[0] |= LINUX_O_SYNC; 1288 if (result & O_ASYNC) 1289 td->td_retval[0] |= LINUX_FASYNC; 1290 #ifdef LINUX_O_NOFOLLOW 1291 if (result & O_NOFOLLOW) 1292 td->td_retval[0] |= LINUX_O_NOFOLLOW; 1293 #endif 1294 #ifdef LINUX_O_DIRECT 1295 if (result & O_DIRECT) 1296 td->td_retval[0] |= LINUX_O_DIRECT; 1297 #endif 1298 return (error); 1299 1300 case LINUX_F_SETFL: 1301 arg = 0; 1302 if (args->arg & LINUX_O_NDELAY) 1303 arg |= O_NONBLOCK; 1304 if (args->arg & LINUX_O_APPEND) 1305 arg |= O_APPEND; 1306 if (args->arg & LINUX_O_SYNC) 1307 arg |= O_FSYNC; 1308 if (args->arg & LINUX_FASYNC) 1309 arg |= O_ASYNC; 1310 #ifdef LINUX_O_NOFOLLOW 1311 if (args->arg & LINUX_O_NOFOLLOW) 1312 arg |= O_NOFOLLOW; 1313 #endif 1314 #ifdef LINUX_O_DIRECT 1315 if (args->arg & LINUX_O_DIRECT) 1316 arg |= O_DIRECT; 1317 #endif 1318 return (kern_fcntl(td, args->fd, F_SETFL, arg)); 1319 1320 case LINUX_F_GETLK: 1321 error = copyin((void *)args->arg, &linux_flock, 1322 sizeof(linux_flock)); 1323 if (error) 1324 return (error); 1325 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1326 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1327 if (error) 1328 return (error); 1329 bsd_to_linux_flock(&bsd_flock, &linux_flock); 1330 return (copyout(&linux_flock, (void *)args->arg, 1331 sizeof(linux_flock))); 1332 1333 case LINUX_F_SETLK: 1334 error = copyin((void *)args->arg, &linux_flock, 1335 sizeof(linux_flock)); 1336 if (error) 1337 return (error); 1338 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1339 return (kern_fcntl(td, args->fd, F_SETLK, 1340 (intptr_t)&bsd_flock)); 1341 1342 case LINUX_F_SETLKW: 1343 error = copyin((void *)args->arg, &linux_flock, 1344 sizeof(linux_flock)); 1345 if (error) 1346 return (error); 1347 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1348 return (kern_fcntl(td, args->fd, F_SETLKW, 1349 (intptr_t)&bsd_flock)); 1350 1351 case LINUX_F_GETOWN: 1352 return (kern_fcntl(td, args->fd, F_GETOWN, 0)); 1353 1354 case LINUX_F_SETOWN: 1355 /* 1356 * XXX some Linux applications depend on F_SETOWN having no 1357 * significant effect for pipes (SIGIO is not delivered for 1358 * pipes under Linux-2.2.35 at least). 1359 */ 1360 error = fget(td, args->fd, 1361 &cap_fcntl_rights, &fp); 1362 if (error) 1363 return (error); 1364 if (fp->f_type == DTYPE_PIPE) { 1365 fdrop(fp, td); 1366 return (EINVAL); 1367 } 1368 fdrop(fp, td); 1369 1370 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg)); 1371 1372 case LINUX_F_DUPFD_CLOEXEC: 1373 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg)); 1374 } 1375 1376 return (EINVAL); 1377 } 1378 1379 int 1380 linux_fcntl(struct thread *td, struct linux_fcntl_args *args) 1381 { 1382 1383 return (fcntl_common(td, args)); 1384 } 1385 1386 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1387 int 1388 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args) 1389 { 1390 struct l_flock64 linux_flock; 1391 struct flock bsd_flock; 1392 struct linux_fcntl_args fcntl_args; 1393 int error; 1394 1395 switch (args->cmd) { 1396 case LINUX_F_GETLK64: 1397 error = copyin((void *)args->arg, &linux_flock, 1398 sizeof(linux_flock)); 1399 if (error) 1400 return (error); 1401 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1402 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1403 if (error) 1404 return (error); 1405 bsd_to_linux_flock64(&bsd_flock, &linux_flock); 1406 return (copyout(&linux_flock, (void *)args->arg, 1407 sizeof(linux_flock))); 1408 1409 case LINUX_F_SETLK64: 1410 error = copyin((void *)args->arg, &linux_flock, 1411 sizeof(linux_flock)); 1412 if (error) 1413 return (error); 1414 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1415 return (kern_fcntl(td, args->fd, F_SETLK, 1416 (intptr_t)&bsd_flock)); 1417 1418 case LINUX_F_SETLKW64: 1419 error = copyin((void *)args->arg, &linux_flock, 1420 sizeof(linux_flock)); 1421 if (error) 1422 return (error); 1423 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1424 return (kern_fcntl(td, args->fd, F_SETLKW, 1425 (intptr_t)&bsd_flock)); 1426 } 1427 1428 fcntl_args.fd = args->fd; 1429 fcntl_args.cmd = args->cmd; 1430 fcntl_args.arg = args->arg; 1431 return (fcntl_common(td, &fcntl_args)); 1432 } 1433 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1434 1435 #ifdef LINUX_LEGACY_SYSCALLS 1436 int 1437 linux_chown(struct thread *td, struct linux_chown_args *args) 1438 { 1439 char *path; 1440 int error; 1441 1442 LCONVPATHEXIST(td, args->path, &path); 1443 1444 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1445 args->gid, 0); 1446 LFREEPATH(path); 1447 return (error); 1448 } 1449 #endif 1450 1451 int 1452 linux_fchownat(struct thread *td, struct linux_fchownat_args *args) 1453 { 1454 char *path; 1455 int error, dfd, flag; 1456 1457 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 1458 return (EINVAL); 1459 1460 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1461 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 1462 1463 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 1464 AT_SYMLINK_NOFOLLOW; 1465 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid, 1466 flag); 1467 LFREEPATH(path); 1468 return (error); 1469 } 1470 1471 #ifdef LINUX_LEGACY_SYSCALLS 1472 int 1473 linux_lchown(struct thread *td, struct linux_lchown_args *args) 1474 { 1475 char *path; 1476 int error; 1477 1478 LCONVPATHEXIST(td, args->path, &path); 1479 1480 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1481 args->gid, AT_SYMLINK_NOFOLLOW); 1482 LFREEPATH(path); 1483 return (error); 1484 } 1485 #endif 1486 1487 static int 1488 convert_fadvice(int advice) 1489 { 1490 switch (advice) { 1491 case LINUX_POSIX_FADV_NORMAL: 1492 return (POSIX_FADV_NORMAL); 1493 case LINUX_POSIX_FADV_RANDOM: 1494 return (POSIX_FADV_RANDOM); 1495 case LINUX_POSIX_FADV_SEQUENTIAL: 1496 return (POSIX_FADV_SEQUENTIAL); 1497 case LINUX_POSIX_FADV_WILLNEED: 1498 return (POSIX_FADV_WILLNEED); 1499 case LINUX_POSIX_FADV_DONTNEED: 1500 return (POSIX_FADV_DONTNEED); 1501 case LINUX_POSIX_FADV_NOREUSE: 1502 return (POSIX_FADV_NOREUSE); 1503 default: 1504 return (-1); 1505 } 1506 } 1507 1508 int 1509 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args) 1510 { 1511 off_t offset; 1512 int advice; 1513 1514 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1515 offset = PAIR32TO64(off_t, args->offset); 1516 #else 1517 offset = args->offset; 1518 #endif 1519 1520 advice = convert_fadvice(args->advice); 1521 if (advice == -1) 1522 return (EINVAL); 1523 return (kern_posix_fadvise(td, args->fd, offset, args->len, advice)); 1524 } 1525 1526 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1527 int 1528 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args) 1529 { 1530 off_t len, offset; 1531 int advice; 1532 1533 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1534 len = PAIR32TO64(off_t, args->len); 1535 offset = PAIR32TO64(off_t, args->offset); 1536 #else 1537 len = args->len; 1538 offset = args->offset; 1539 #endif 1540 1541 advice = convert_fadvice(args->advice); 1542 if (advice == -1) 1543 return (EINVAL); 1544 return (kern_posix_fadvise(td, args->fd, offset, len, advice)); 1545 } 1546 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1547 1548 #ifdef LINUX_LEGACY_SYSCALLS 1549 int 1550 linux_pipe(struct thread *td, struct linux_pipe_args *args) 1551 { 1552 int fildes[2]; 1553 int error; 1554 1555 error = kern_pipe(td, fildes, 0, NULL, NULL); 1556 if (error != 0) 1557 return (error); 1558 1559 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1560 if (error != 0) { 1561 (void)kern_close(td, fildes[0]); 1562 (void)kern_close(td, fildes[1]); 1563 } 1564 1565 return (error); 1566 } 1567 #endif 1568 1569 int 1570 linux_pipe2(struct thread *td, struct linux_pipe2_args *args) 1571 { 1572 int fildes[2]; 1573 int error, flags; 1574 1575 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0) 1576 return (EINVAL); 1577 1578 flags = 0; 1579 if ((args->flags & LINUX_O_NONBLOCK) != 0) 1580 flags |= O_NONBLOCK; 1581 if ((args->flags & LINUX_O_CLOEXEC) != 0) 1582 flags |= O_CLOEXEC; 1583 error = kern_pipe(td, fildes, flags, NULL, NULL); 1584 if (error != 0) 1585 return (error); 1586 1587 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1588 if (error != 0) { 1589 (void)kern_close(td, fildes[0]); 1590 (void)kern_close(td, fildes[1]); 1591 } 1592 1593 return (error); 1594 } 1595 1596 int 1597 linux_dup3(struct thread *td, struct linux_dup3_args *args) 1598 { 1599 int cmd; 1600 intptr_t newfd; 1601 1602 if (args->oldfd == args->newfd) 1603 return (EINVAL); 1604 if ((args->flags & ~LINUX_O_CLOEXEC) != 0) 1605 return (EINVAL); 1606 if (args->flags & LINUX_O_CLOEXEC) 1607 cmd = F_DUP2FD_CLOEXEC; 1608 else 1609 cmd = F_DUP2FD; 1610 1611 newfd = args->newfd; 1612 return (kern_fcntl(td, args->oldfd, cmd, newfd)); 1613 } 1614 1615 int 1616 linux_fallocate(struct thread *td, struct linux_fallocate_args *args) 1617 { 1618 off_t len, offset; 1619 1620 /* 1621 * We emulate only posix_fallocate system call for which 1622 * mode should be 0. 1623 */ 1624 if (args->mode != 0) 1625 return (ENOSYS); 1626 1627 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1628 len = PAIR32TO64(off_t, args->len); 1629 offset = PAIR32TO64(off_t, args->offset); 1630 #else 1631 len = args->len; 1632 offset = args->offset; 1633 #endif 1634 1635 return (kern_posix_fallocate(td, args->fd, offset, len)); 1636 } 1637 1638 int 1639 linux_copy_file_range(struct thread *td, struct linux_copy_file_range_args 1640 *args) 1641 { 1642 l_loff_t inoff, outoff, *inoffp, *outoffp; 1643 int error, flags; 1644 1645 /* 1646 * copy_file_range(2) on Linux doesn't define any flags (yet), so is 1647 * the native implementation. Enforce it. 1648 */ 1649 if (args->flags != 0) { 1650 linux_msg(td, "copy_file_range unsupported flags 0x%x", 1651 args->flags); 1652 return (EINVAL); 1653 } 1654 flags = 0; 1655 inoffp = outoffp = NULL; 1656 if (args->off_in != NULL) { 1657 error = copyin(args->off_in, &inoff, sizeof(l_loff_t)); 1658 if (error != 0) 1659 return (error); 1660 inoffp = &inoff; 1661 } 1662 if (args->off_out != NULL) { 1663 error = copyin(args->off_out, &outoff, sizeof(l_loff_t)); 1664 if (error != 0) 1665 return (error); 1666 outoffp = &outoff; 1667 } 1668 1669 error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out, 1670 outoffp, args->len, flags); 1671 if (error == 0 && args->off_in != NULL) 1672 error = copyout(inoffp, args->off_in, sizeof(l_loff_t)); 1673 if (error == 0 && args->off_out != NULL) 1674 error = copyout(outoffp, args->off_out, sizeof(l_loff_t)); 1675 return (error); 1676 } 1677 1678