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 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); 823 824 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 825 LFREEPATH(path); 826 return (error); 827 } 828 829 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 830 int 831 linux_truncate64(struct thread *td, struct linux_truncate64_args *args) 832 { 833 char *path; 834 int error; 835 836 LCONVPATHEXIST(td, args->path, &path); 837 838 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 839 LFREEPATH(path); 840 return (error); 841 } 842 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 843 844 int 845 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args) 846 { 847 848 return (kern_ftruncate(td, args->fd, args->length)); 849 } 850 851 #ifdef LINUX_LEGACY_SYSCALLS 852 int 853 linux_link(struct thread *td, struct linux_link_args *args) 854 { 855 char *path, *to; 856 int error; 857 858 LCONVPATHEXIST(td, args->path, &path); 859 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 860 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 861 if (to == NULL) { 862 LFREEPATH(path); 863 return (error); 864 } 865 866 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE, 867 FOLLOW); 868 LFREEPATH(path); 869 LFREEPATH(to); 870 return (error); 871 } 872 #endif 873 874 int 875 linux_linkat(struct thread *td, struct linux_linkat_args *args) 876 { 877 char *path, *to; 878 int error, olddfd, newdfd, follow; 879 880 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW) 881 return (EINVAL); 882 883 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 884 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 885 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd); 886 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 887 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 888 if (to == NULL) { 889 LFREEPATH(path); 890 return (error); 891 } 892 893 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW : 894 FOLLOW; 895 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow); 896 LFREEPATH(path); 897 LFREEPATH(to); 898 return (error); 899 } 900 901 int 902 linux_fdatasync(struct thread *td, struct linux_fdatasync_args *uap) 903 { 904 905 return (kern_fsync(td, uap->fd, false)); 906 } 907 908 int 909 linux_sync_file_range(struct thread *td, struct linux_sync_file_range_args *uap) 910 { 911 912 if (uap->offset < 0 || uap->nbytes < 0 || 913 (uap->flags & ~(LINUX_SYNC_FILE_RANGE_WAIT_BEFORE | 914 LINUX_SYNC_FILE_RANGE_WRITE | 915 LINUX_SYNC_FILE_RANGE_WAIT_AFTER)) != 0) { 916 return (EINVAL); 917 } 918 919 return (kern_fsync(td, uap->fd, false)); 920 } 921 922 int 923 linux_pread(struct thread *td, struct linux_pread_args *uap) 924 { 925 struct vnode *vp; 926 int error; 927 928 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, uap->offset); 929 if (error == 0) { 930 /* This seems to violate POSIX but Linux does it. */ 931 error = fgetvp(td, uap->fd, &cap_pread_rights, &vp); 932 if (error != 0) 933 return (error); 934 if (vp->v_type == VDIR) { 935 vrele(vp); 936 return (EISDIR); 937 } 938 vrele(vp); 939 } 940 return (error); 941 } 942 943 int 944 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap) 945 { 946 947 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, uap->offset)); 948 } 949 950 int 951 linux_preadv(struct thread *td, struct linux_preadv_args *uap) 952 { 953 struct uio *auio; 954 int error; 955 off_t offset; 956 957 /* 958 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES 959 * pos_l and pos_h, respectively, contain the 960 * low order and high order 32 bits of offset. 961 */ 962 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 963 (sizeof(offset) * 4)) | uap->pos_l; 964 if (offset < 0) 965 return (EINVAL); 966 #ifdef COMPAT_LINUX32 967 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 968 #else 969 error = copyinuio(uap->vec, uap->vlen, &auio); 970 #endif 971 if (error != 0) 972 return (error); 973 error = kern_preadv(td, uap->fd, auio, offset); 974 free(auio, M_IOV); 975 return (error); 976 } 977 978 int 979 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap) 980 { 981 struct uio *auio; 982 int error; 983 off_t offset; 984 985 /* 986 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES 987 * pos_l and pos_h, respectively, contain the 988 * low order and high order 32 bits of offset. 989 */ 990 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 991 (sizeof(offset) * 4)) | uap->pos_l; 992 if (offset < 0) 993 return (EINVAL); 994 #ifdef COMPAT_LINUX32 995 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 996 #else 997 error = copyinuio(uap->vec, uap->vlen, &auio); 998 #endif 999 if (error != 0) 1000 return (error); 1001 error = kern_pwritev(td, uap->fd, auio, offset); 1002 free(auio, M_IOV); 1003 return (error); 1004 } 1005 1006 int 1007 linux_mount(struct thread *td, struct linux_mount_args *args) 1008 { 1009 char fstypename[MFSNAMELEN]; 1010 char *mntonname, *mntfromname; 1011 int error, fsflags; 1012 1013 mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1014 mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1015 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1, 1016 NULL); 1017 if (error != 0) 1018 goto out; 1019 if (args->specialfile != NULL) { 1020 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL); 1021 if (error != 0) 1022 goto out; 1023 } else { 1024 mntfromname[0] = '\0'; 1025 } 1026 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL); 1027 if (error != 0) 1028 goto out; 1029 1030 if (strcmp(fstypename, "ext2") == 0) { 1031 strcpy(fstypename, "ext2fs"); 1032 } else if (strcmp(fstypename, "proc") == 0) { 1033 strcpy(fstypename, "linprocfs"); 1034 } else if (strcmp(fstypename, "vfat") == 0) { 1035 strcpy(fstypename, "msdosfs"); 1036 } 1037 1038 fsflags = 0; 1039 1040 /* 1041 * Linux SYNC flag is not included; the closest equivalent 1042 * FreeBSD has is !ASYNC, which is our default. 1043 */ 1044 if (args->rwflag & LINUX_MS_RDONLY) 1045 fsflags |= MNT_RDONLY; 1046 if (args->rwflag & LINUX_MS_NOSUID) 1047 fsflags |= MNT_NOSUID; 1048 if (args->rwflag & LINUX_MS_NOEXEC) 1049 fsflags |= MNT_NOEXEC; 1050 if (args->rwflag & LINUX_MS_REMOUNT) 1051 fsflags |= MNT_UPDATE; 1052 1053 error = kernel_vmount(fsflags, 1054 "fstype", fstypename, 1055 "fspath", mntonname, 1056 "from", mntfromname, 1057 NULL); 1058 out: 1059 free(mntonname, M_TEMP); 1060 free(mntfromname, M_TEMP); 1061 return (error); 1062 } 1063 1064 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1065 int 1066 linux_oldumount(struct thread *td, struct linux_oldumount_args *args) 1067 { 1068 struct linux_umount_args args2; 1069 1070 args2.path = args->path; 1071 args2.flags = 0; 1072 return (linux_umount(td, &args2)); 1073 } 1074 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1075 1076 #ifdef LINUX_LEGACY_SYSCALLS 1077 int 1078 linux_umount(struct thread *td, struct linux_umount_args *args) 1079 { 1080 struct unmount_args bsd; 1081 int flags; 1082 1083 flags = 0; 1084 if ((args->flags & LINUX_MNT_FORCE) != 0) 1085 flags |= MNT_FORCE; 1086 1087 bsd.path = args->path; 1088 bsd.flags = flags; 1089 return (sys_unmount(td, &bsd)); 1090 } 1091 #endif 1092 1093 /* 1094 * fcntl family of syscalls 1095 */ 1096 1097 struct l_flock { 1098 l_short l_type; 1099 l_short l_whence; 1100 l_off_t l_start; 1101 l_off_t l_len; 1102 l_pid_t l_pid; 1103 } 1104 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1105 __packed 1106 #endif 1107 ; 1108 1109 static void 1110 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock) 1111 { 1112 switch (linux_flock->l_type) { 1113 case LINUX_F_RDLCK: 1114 bsd_flock->l_type = F_RDLCK; 1115 break; 1116 case LINUX_F_WRLCK: 1117 bsd_flock->l_type = F_WRLCK; 1118 break; 1119 case LINUX_F_UNLCK: 1120 bsd_flock->l_type = F_UNLCK; 1121 break; 1122 default: 1123 bsd_flock->l_type = -1; 1124 break; 1125 } 1126 bsd_flock->l_whence = linux_flock->l_whence; 1127 bsd_flock->l_start = (off_t)linux_flock->l_start; 1128 bsd_flock->l_len = (off_t)linux_flock->l_len; 1129 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1130 bsd_flock->l_sysid = 0; 1131 } 1132 1133 static void 1134 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock) 1135 { 1136 switch (bsd_flock->l_type) { 1137 case F_RDLCK: 1138 linux_flock->l_type = LINUX_F_RDLCK; 1139 break; 1140 case F_WRLCK: 1141 linux_flock->l_type = LINUX_F_WRLCK; 1142 break; 1143 case F_UNLCK: 1144 linux_flock->l_type = LINUX_F_UNLCK; 1145 break; 1146 } 1147 linux_flock->l_whence = bsd_flock->l_whence; 1148 linux_flock->l_start = (l_off_t)bsd_flock->l_start; 1149 linux_flock->l_len = (l_off_t)bsd_flock->l_len; 1150 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1151 } 1152 1153 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1154 struct l_flock64 { 1155 l_short l_type; 1156 l_short l_whence; 1157 l_loff_t l_start; 1158 l_loff_t l_len; 1159 l_pid_t l_pid; 1160 } 1161 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1162 __packed 1163 #endif 1164 ; 1165 1166 static void 1167 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock) 1168 { 1169 switch (linux_flock->l_type) { 1170 case LINUX_F_RDLCK: 1171 bsd_flock->l_type = F_RDLCK; 1172 break; 1173 case LINUX_F_WRLCK: 1174 bsd_flock->l_type = F_WRLCK; 1175 break; 1176 case LINUX_F_UNLCK: 1177 bsd_flock->l_type = F_UNLCK; 1178 break; 1179 default: 1180 bsd_flock->l_type = -1; 1181 break; 1182 } 1183 bsd_flock->l_whence = linux_flock->l_whence; 1184 bsd_flock->l_start = (off_t)linux_flock->l_start; 1185 bsd_flock->l_len = (off_t)linux_flock->l_len; 1186 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1187 bsd_flock->l_sysid = 0; 1188 } 1189 1190 static void 1191 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock) 1192 { 1193 switch (bsd_flock->l_type) { 1194 case F_RDLCK: 1195 linux_flock->l_type = LINUX_F_RDLCK; 1196 break; 1197 case F_WRLCK: 1198 linux_flock->l_type = LINUX_F_WRLCK; 1199 break; 1200 case F_UNLCK: 1201 linux_flock->l_type = LINUX_F_UNLCK; 1202 break; 1203 } 1204 linux_flock->l_whence = bsd_flock->l_whence; 1205 linux_flock->l_start = (l_loff_t)bsd_flock->l_start; 1206 linux_flock->l_len = (l_loff_t)bsd_flock->l_len; 1207 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1208 } 1209 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1210 1211 static int 1212 fcntl_common(struct thread *td, struct linux_fcntl_args *args) 1213 { 1214 struct l_flock linux_flock; 1215 struct flock bsd_flock; 1216 struct file *fp; 1217 long arg; 1218 int error, result; 1219 1220 switch (args->cmd) { 1221 case LINUX_F_DUPFD: 1222 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg)); 1223 1224 case LINUX_F_GETFD: 1225 return (kern_fcntl(td, args->fd, F_GETFD, 0)); 1226 1227 case LINUX_F_SETFD: 1228 return (kern_fcntl(td, args->fd, F_SETFD, args->arg)); 1229 1230 case LINUX_F_GETFL: 1231 error = kern_fcntl(td, args->fd, F_GETFL, 0); 1232 result = td->td_retval[0]; 1233 td->td_retval[0] = 0; 1234 if (result & O_RDONLY) 1235 td->td_retval[0] |= LINUX_O_RDONLY; 1236 if (result & O_WRONLY) 1237 td->td_retval[0] |= LINUX_O_WRONLY; 1238 if (result & O_RDWR) 1239 td->td_retval[0] |= LINUX_O_RDWR; 1240 if (result & O_NDELAY) 1241 td->td_retval[0] |= LINUX_O_NONBLOCK; 1242 if (result & O_APPEND) 1243 td->td_retval[0] |= LINUX_O_APPEND; 1244 if (result & O_FSYNC) 1245 td->td_retval[0] |= LINUX_O_SYNC; 1246 if (result & O_ASYNC) 1247 td->td_retval[0] |= LINUX_FASYNC; 1248 #ifdef LINUX_O_NOFOLLOW 1249 if (result & O_NOFOLLOW) 1250 td->td_retval[0] |= LINUX_O_NOFOLLOW; 1251 #endif 1252 #ifdef LINUX_O_DIRECT 1253 if (result & O_DIRECT) 1254 td->td_retval[0] |= LINUX_O_DIRECT; 1255 #endif 1256 return (error); 1257 1258 case LINUX_F_SETFL: 1259 arg = 0; 1260 if (args->arg & LINUX_O_NDELAY) 1261 arg |= O_NONBLOCK; 1262 if (args->arg & LINUX_O_APPEND) 1263 arg |= O_APPEND; 1264 if (args->arg & LINUX_O_SYNC) 1265 arg |= O_FSYNC; 1266 if (args->arg & LINUX_FASYNC) 1267 arg |= O_ASYNC; 1268 #ifdef LINUX_O_NOFOLLOW 1269 if (args->arg & LINUX_O_NOFOLLOW) 1270 arg |= O_NOFOLLOW; 1271 #endif 1272 #ifdef LINUX_O_DIRECT 1273 if (args->arg & LINUX_O_DIRECT) 1274 arg |= O_DIRECT; 1275 #endif 1276 return (kern_fcntl(td, args->fd, F_SETFL, arg)); 1277 1278 case LINUX_F_GETLK: 1279 error = copyin((void *)args->arg, &linux_flock, 1280 sizeof(linux_flock)); 1281 if (error) 1282 return (error); 1283 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1284 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1285 if (error) 1286 return (error); 1287 bsd_to_linux_flock(&bsd_flock, &linux_flock); 1288 return (copyout(&linux_flock, (void *)args->arg, 1289 sizeof(linux_flock))); 1290 1291 case LINUX_F_SETLK: 1292 error = copyin((void *)args->arg, &linux_flock, 1293 sizeof(linux_flock)); 1294 if (error) 1295 return (error); 1296 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1297 return (kern_fcntl(td, args->fd, F_SETLK, 1298 (intptr_t)&bsd_flock)); 1299 1300 case LINUX_F_SETLKW: 1301 error = copyin((void *)args->arg, &linux_flock, 1302 sizeof(linux_flock)); 1303 if (error) 1304 return (error); 1305 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1306 return (kern_fcntl(td, args->fd, F_SETLKW, 1307 (intptr_t)&bsd_flock)); 1308 1309 case LINUX_F_GETOWN: 1310 return (kern_fcntl(td, args->fd, F_GETOWN, 0)); 1311 1312 case LINUX_F_SETOWN: 1313 /* 1314 * XXX some Linux applications depend on F_SETOWN having no 1315 * significant effect for pipes (SIGIO is not delivered for 1316 * pipes under Linux-2.2.35 at least). 1317 */ 1318 error = fget(td, args->fd, 1319 &cap_fcntl_rights, &fp); 1320 if (error) 1321 return (error); 1322 if (fp->f_type == DTYPE_PIPE) { 1323 fdrop(fp, td); 1324 return (EINVAL); 1325 } 1326 fdrop(fp, td); 1327 1328 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg)); 1329 1330 case LINUX_F_DUPFD_CLOEXEC: 1331 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg)); 1332 } 1333 1334 return (EINVAL); 1335 } 1336 1337 int 1338 linux_fcntl(struct thread *td, struct linux_fcntl_args *args) 1339 { 1340 1341 return (fcntl_common(td, args)); 1342 } 1343 1344 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1345 int 1346 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args) 1347 { 1348 struct l_flock64 linux_flock; 1349 struct flock bsd_flock; 1350 struct linux_fcntl_args fcntl_args; 1351 int error; 1352 1353 switch (args->cmd) { 1354 case LINUX_F_GETLK64: 1355 error = copyin((void *)args->arg, &linux_flock, 1356 sizeof(linux_flock)); 1357 if (error) 1358 return (error); 1359 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1360 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1361 if (error) 1362 return (error); 1363 bsd_to_linux_flock64(&bsd_flock, &linux_flock); 1364 return (copyout(&linux_flock, (void *)args->arg, 1365 sizeof(linux_flock))); 1366 1367 case LINUX_F_SETLK64: 1368 error = copyin((void *)args->arg, &linux_flock, 1369 sizeof(linux_flock)); 1370 if (error) 1371 return (error); 1372 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1373 return (kern_fcntl(td, args->fd, F_SETLK, 1374 (intptr_t)&bsd_flock)); 1375 1376 case LINUX_F_SETLKW64: 1377 error = copyin((void *)args->arg, &linux_flock, 1378 sizeof(linux_flock)); 1379 if (error) 1380 return (error); 1381 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1382 return (kern_fcntl(td, args->fd, F_SETLKW, 1383 (intptr_t)&bsd_flock)); 1384 } 1385 1386 fcntl_args.fd = args->fd; 1387 fcntl_args.cmd = args->cmd; 1388 fcntl_args.arg = args->arg; 1389 return (fcntl_common(td, &fcntl_args)); 1390 } 1391 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1392 1393 #ifdef LINUX_LEGACY_SYSCALLS 1394 int 1395 linux_chown(struct thread *td, struct linux_chown_args *args) 1396 { 1397 char *path; 1398 int error; 1399 1400 LCONVPATHEXIST(td, args->path, &path); 1401 1402 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1403 args->gid, 0); 1404 LFREEPATH(path); 1405 return (error); 1406 } 1407 #endif 1408 1409 int 1410 linux_fchownat(struct thread *td, struct linux_fchownat_args *args) 1411 { 1412 char *path; 1413 int error, dfd, flag; 1414 1415 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 1416 return (EINVAL); 1417 1418 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1419 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 1420 1421 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 1422 AT_SYMLINK_NOFOLLOW; 1423 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid, 1424 flag); 1425 LFREEPATH(path); 1426 return (error); 1427 } 1428 1429 #ifdef LINUX_LEGACY_SYSCALLS 1430 int 1431 linux_lchown(struct thread *td, struct linux_lchown_args *args) 1432 { 1433 char *path; 1434 int error; 1435 1436 LCONVPATHEXIST(td, args->path, &path); 1437 1438 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1439 args->gid, AT_SYMLINK_NOFOLLOW); 1440 LFREEPATH(path); 1441 return (error); 1442 } 1443 #endif 1444 1445 static int 1446 convert_fadvice(int advice) 1447 { 1448 switch (advice) { 1449 case LINUX_POSIX_FADV_NORMAL: 1450 return (POSIX_FADV_NORMAL); 1451 case LINUX_POSIX_FADV_RANDOM: 1452 return (POSIX_FADV_RANDOM); 1453 case LINUX_POSIX_FADV_SEQUENTIAL: 1454 return (POSIX_FADV_SEQUENTIAL); 1455 case LINUX_POSIX_FADV_WILLNEED: 1456 return (POSIX_FADV_WILLNEED); 1457 case LINUX_POSIX_FADV_DONTNEED: 1458 return (POSIX_FADV_DONTNEED); 1459 case LINUX_POSIX_FADV_NOREUSE: 1460 return (POSIX_FADV_NOREUSE); 1461 default: 1462 return (-1); 1463 } 1464 } 1465 1466 int 1467 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args) 1468 { 1469 int advice; 1470 1471 advice = convert_fadvice(args->advice); 1472 if (advice == -1) 1473 return (EINVAL); 1474 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1475 advice)); 1476 } 1477 1478 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1479 int 1480 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args) 1481 { 1482 int advice; 1483 1484 advice = convert_fadvice(args->advice); 1485 if (advice == -1) 1486 return (EINVAL); 1487 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1488 advice)); 1489 } 1490 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1491 1492 #ifdef LINUX_LEGACY_SYSCALLS 1493 int 1494 linux_pipe(struct thread *td, struct linux_pipe_args *args) 1495 { 1496 int fildes[2]; 1497 int error; 1498 1499 error = kern_pipe(td, fildes, 0, NULL, NULL); 1500 if (error != 0) 1501 return (error); 1502 1503 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1504 if (error != 0) { 1505 (void)kern_close(td, fildes[0]); 1506 (void)kern_close(td, fildes[1]); 1507 } 1508 1509 return (error); 1510 } 1511 #endif 1512 1513 int 1514 linux_pipe2(struct thread *td, struct linux_pipe2_args *args) 1515 { 1516 int fildes[2]; 1517 int error, flags; 1518 1519 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0) 1520 return (EINVAL); 1521 1522 flags = 0; 1523 if ((args->flags & LINUX_O_NONBLOCK) != 0) 1524 flags |= O_NONBLOCK; 1525 if ((args->flags & LINUX_O_CLOEXEC) != 0) 1526 flags |= O_CLOEXEC; 1527 error = kern_pipe(td, fildes, flags, NULL, NULL); 1528 if (error != 0) 1529 return (error); 1530 1531 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1532 if (error != 0) { 1533 (void)kern_close(td, fildes[0]); 1534 (void)kern_close(td, fildes[1]); 1535 } 1536 1537 return (error); 1538 } 1539 1540 int 1541 linux_dup3(struct thread *td, struct linux_dup3_args *args) 1542 { 1543 int cmd; 1544 intptr_t newfd; 1545 1546 if (args->oldfd == args->newfd) 1547 return (EINVAL); 1548 if ((args->flags & ~LINUX_O_CLOEXEC) != 0) 1549 return (EINVAL); 1550 if (args->flags & LINUX_O_CLOEXEC) 1551 cmd = F_DUP2FD_CLOEXEC; 1552 else 1553 cmd = F_DUP2FD; 1554 1555 newfd = args->newfd; 1556 return (kern_fcntl(td, args->oldfd, cmd, newfd)); 1557 } 1558 1559 int 1560 linux_fallocate(struct thread *td, struct linux_fallocate_args *args) 1561 { 1562 1563 /* 1564 * We emulate only posix_fallocate system call for which 1565 * mode should be 0. 1566 */ 1567 if (args->mode != 0) 1568 return (ENOSYS); 1569 1570 return (kern_posix_fallocate(td, args->fd, args->offset, 1571 args->len)); 1572 } 1573 1574 int 1575 linux_copy_file_range(struct thread *td, struct linux_copy_file_range_args 1576 *args) 1577 { 1578 l_loff_t inoff, outoff, *inoffp, *outoffp; 1579 int error, flags; 1580 1581 /* 1582 * copy_file_range(2) on Linux doesn't define any flags (yet), so is 1583 * the native implementation. Enforce it. 1584 */ 1585 if (args->flags != 0) { 1586 linux_msg(td, "copy_file_range unsupported flags 0x%x", 1587 args->flags); 1588 return (EINVAL); 1589 } 1590 flags = 0; 1591 inoffp = outoffp = NULL; 1592 if (args->off_in != NULL) { 1593 error = copyin(args->off_in, &inoff, sizeof(l_loff_t)); 1594 if (error != 0) 1595 return (error); 1596 inoffp = &inoff; 1597 } 1598 if (args->off_out != NULL) { 1599 error = copyin(args->off_out, &outoff, sizeof(l_loff_t)); 1600 if (error != 0) 1601 return (error); 1602 outoffp = &outoff; 1603 } 1604 1605 error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out, 1606 outoffp, args->len, flags); 1607 if (error == 0 && args->off_in != NULL) 1608 error = copyout(inoffp, args->off_in, sizeof(l_loff_t)); 1609 if (error == 0 && args->off_out != NULL) 1610 error = copyout(outoffp, args->off_out, sizeof(l_loff_t)); 1611 return (error); 1612 } 1613 1614