Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_file.c
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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: releng/11.2/sys/compat/linux/linux_file.c 330997 2018-03-15 12:56:22Z emaste $"); 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 int 72 linux_creat(struct thread *td, struct linux_creat_args *args) 73 { 74 char *path; 75 int error; 76 77 LCONVPATHEXIST(td, args->path, &path); 78 #ifdef DEBUG 79 if (ldebug(creat)) 80 printf(ARGS(creat, "%s, %d"), path, args->mode); 81 #endif 82 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, 83 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 84 LFREEPATH(path); 85 return (error); 86 } 87 88 89 static int 90 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode) 91 { 92 cap_rights_t rights; 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_open() 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_rights_init(&rights, CAP_IOCTL), &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 if (ldebug(open)) 170 printf(LMSG("open returns error %d"), error); 171 #endif 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 #ifdef DEBUG 188 if (ldebug(openat)) 189 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd, 190 path, args->flags, args->mode); 191 #endif 192 return (linux_common_open(td, dfd, path, args->flags, args->mode)); 193 } 194 195 int 196 linux_open(struct thread *td, struct linux_open_args *args) 197 { 198 char *path; 199 200 if (args->flags & LINUX_O_CREAT) 201 LCONVPATHCREAT(td, args->path, &path); 202 else 203 LCONVPATHEXIST(td, args->path, &path); 204 #ifdef DEBUG 205 if (ldebug(open)) 206 printf(ARGS(open, "%s, 0x%x, 0x%x"), 207 path, args->flags, args->mode); 208 #endif 209 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode)); 210 } 211 212 int 213 linux_lseek(struct thread *td, struct linux_lseek_args *args) 214 { 215 216 #ifdef DEBUG 217 if (ldebug(lseek)) 218 printf(ARGS(lseek, "%d, %ld, %d"), 219 args->fdes, (long)args->off, args->whence); 220 #endif 221 return (kern_lseek(td, args->fdes, args->off, args->whence)); 222 } 223 224 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 225 int 226 linux_llseek(struct thread *td, struct linux_llseek_args *args) 227 { 228 int error; 229 off_t off; 230 231 #ifdef DEBUG 232 if (ldebug(llseek)) 233 printf(ARGS(llseek, "%d, %d:%d, %d"), 234 args->fd, args->ohigh, args->olow, args->whence); 235 #endif 236 off = (args->olow) | (((off_t) args->ohigh) << 32); 237 238 error = kern_lseek(td, args->fd, off, args->whence); 239 if (error != 0) 240 return (error); 241 242 error = copyout(td->td_retval, args->res, sizeof(off_t)); 243 if (error != 0) 244 return (error); 245 246 td->td_retval[0] = 0; 247 return (0); 248 } 249 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 250 251 /* 252 * Note that linux_getdents(2) and linux_getdents64(2) have the same 253 * arguments. They only differ in the definition of struct dirent they 254 * operate on. 255 * Note that linux_readdir(2) is a special case of linux_getdents(2) 256 * where count is always equals 1, meaning that the buffer is one 257 * dirent-structure in size and that the code can't handle more anyway. 258 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2) 259 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will 260 * trash user stack. 261 */ 262 263 static int 264 linux_getdents_error(struct thread *td, int fd, int err) 265 { 266 cap_rights_t rights; 267 struct vnode *vp; 268 struct file *fp; 269 int error; 270 271 /* Linux return ENOTDIR in case when fd is not a directory. */ 272 error = getvnode(td, fd, cap_rights_init(&rights, CAP_READ), &fp); 273 if (error != 0) 274 return (error); 275 vp = fp->f_vnode; 276 if (vp->v_type != VDIR) { 277 fdrop(fp, td); 278 return (ENOTDIR); 279 } 280 fdrop(fp, td); 281 return (err); 282 } 283 284 struct l_dirent { 285 l_ulong d_ino; 286 l_off_t d_off; 287 l_ushort d_reclen; 288 char d_name[LINUX_NAME_MAX + 1]; 289 }; 290 291 struct l_dirent64 { 292 uint64_t d_ino; 293 int64_t d_off; 294 l_ushort d_reclen; 295 u_char d_type; 296 char d_name[LINUX_NAME_MAX + 1]; 297 }; 298 299 /* 300 * Linux uses the last byte in the dirent buffer to store d_type, 301 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes. 302 */ 303 #define LINUX_RECLEN(namlen) \ 304 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong)) 305 306 #define LINUX_RECLEN64(namlen) \ 307 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \ 308 sizeof(uint64_t)) 309 310 /* 311 * Linux l_dirent is bigger than FreeBSD dirent, thus the buffer size 312 * passed to kern_getdirentries() must be smaller than the one passed 313 * to linux_getdents() by certain factor. 314 */ 315 #define LINUX_RECLEN_RATIO(X) X * offsetof(struct dirent, d_name) / \ 316 offsetof(struct l_dirent, d_name); 317 #define LINUX_RECLEN64_RATIO(X) X * offsetof(struct dirent, d_name) / \ 318 offsetof(struct l_dirent64, d_name); 319 320 int 321 linux_getdents(struct thread *td, struct linux_getdents_args *args) 322 { 323 struct dirent *bdp; 324 caddr_t inp, buf; /* BSD-format */ 325 int len, reclen; /* BSD-format */ 326 caddr_t outp; /* Linux-format */ 327 int resid, linuxreclen; /* Linux-format */ 328 caddr_t lbuf; /* Linux-format */ 329 long base; 330 struct l_dirent *linux_dirent; 331 int buflen, error; 332 size_t retval; 333 334 #ifdef DEBUG 335 if (ldebug(getdents)) 336 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count); 337 #endif 338 buflen = LINUX_RECLEN_RATIO(args->count); 339 buflen = min(buflen, MAXBSIZE); 340 buf = malloc(buflen, M_TEMP, M_WAITOK); 341 342 error = kern_getdirentries(td, args->fd, buf, buflen, 343 &base, NULL, UIO_SYSSPACE); 344 if (error != 0) { 345 error = linux_getdents_error(td, args->fd, error); 346 goto out1; 347 } 348 349 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 350 351 len = td->td_retval[0]; 352 inp = buf; 353 outp = (caddr_t)args->dent; 354 resid = args->count; 355 retval = 0; 356 357 while (len > 0) { 358 bdp = (struct dirent *) inp; 359 reclen = bdp->d_reclen; 360 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 361 /* 362 * No more space in the user supplied dirent buffer. 363 * Return EINVAL. 364 */ 365 if (resid < linuxreclen) { 366 error = EINVAL; 367 goto out; 368 } 369 370 linux_dirent = (struct l_dirent*)lbuf; 371 linux_dirent->d_ino = bdp->d_fileno; 372 linux_dirent->d_off = base + reclen; 373 linux_dirent->d_reclen = linuxreclen; 374 /* 375 * Copy d_type to last byte of l_dirent buffer 376 */ 377 lbuf[linuxreclen - 1] = bdp->d_type; 378 strlcpy(linux_dirent->d_name, bdp->d_name, 379 linuxreclen - offsetof(struct l_dirent, d_name)-1); 380 error = copyout(linux_dirent, outp, linuxreclen); 381 if (error != 0) 382 goto out; 383 384 inp += reclen; 385 base += reclen; 386 len -= reclen; 387 388 retval += linuxreclen; 389 outp += linuxreclen; 390 resid -= linuxreclen; 391 } 392 td->td_retval[0] = retval; 393 394 out: 395 free(lbuf, M_TEMP); 396 out1: 397 free(buf, M_TEMP); 398 return (error); 399 } 400 401 int 402 linux_getdents64(struct thread *td, struct linux_getdents64_args *args) 403 { 404 struct dirent *bdp; 405 caddr_t inp, buf; /* BSD-format */ 406 int len, reclen; /* BSD-format */ 407 caddr_t outp; /* Linux-format */ 408 int resid, linuxreclen; /* Linux-format */ 409 caddr_t lbuf; /* Linux-format */ 410 long base; 411 struct l_dirent64 *linux_dirent64; 412 int buflen, error; 413 size_t retval; 414 415 #ifdef DEBUG 416 if (ldebug(getdents64)) 417 uprintf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count); 418 #endif 419 buflen = LINUX_RECLEN64_RATIO(args->count); 420 buflen = min(buflen, MAXBSIZE); 421 buf = malloc(buflen, M_TEMP, M_WAITOK); 422 423 error = kern_getdirentries(td, args->fd, buf, buflen, 424 &base, NULL, UIO_SYSSPACE); 425 if (error != 0) { 426 error = linux_getdents_error(td, args->fd, error); 427 goto out1; 428 } 429 430 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 431 432 len = td->td_retval[0]; 433 inp = buf; 434 outp = (caddr_t)args->dirent; 435 resid = args->count; 436 retval = 0; 437 438 while (len > 0) { 439 bdp = (struct dirent *) inp; 440 reclen = bdp->d_reclen; 441 linuxreclen = LINUX_RECLEN64(bdp->d_namlen); 442 /* 443 * No more space in the user supplied dirent buffer. 444 * Return EINVAL. 445 */ 446 if (resid < linuxreclen) { 447 error = EINVAL; 448 goto out; 449 } 450 451 linux_dirent64 = (struct l_dirent64*)lbuf; 452 linux_dirent64->d_ino = bdp->d_fileno; 453 linux_dirent64->d_off = base + reclen; 454 linux_dirent64->d_reclen = linuxreclen; 455 linux_dirent64->d_type = bdp->d_type; 456 strlcpy(linux_dirent64->d_name, bdp->d_name, 457 linuxreclen - offsetof(struct l_dirent64, d_name)); 458 error = copyout(linux_dirent64, outp, linuxreclen); 459 if (error != 0) 460 goto out; 461 462 inp += reclen; 463 base += reclen; 464 len -= reclen; 465 466 retval += linuxreclen; 467 outp += linuxreclen; 468 resid -= linuxreclen; 469 } 470 td->td_retval[0] = retval; 471 472 out: 473 free(lbuf, M_TEMP); 474 out1: 475 free(buf, M_TEMP); 476 return (error); 477 } 478 479 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 480 int 481 linux_readdir(struct thread *td, struct linux_readdir_args *args) 482 { 483 struct dirent *bdp; 484 caddr_t buf; /* BSD-format */ 485 int linuxreclen; /* Linux-format */ 486 caddr_t lbuf; /* Linux-format */ 487 long base; 488 struct l_dirent *linux_dirent; 489 int buflen, error; 490 491 #ifdef DEBUG 492 if (ldebug(readdir)) 493 printf(ARGS(readdir, "%d, *"), args->fd); 494 #endif 495 buflen = LINUX_RECLEN(LINUX_NAME_MAX); 496 buflen = LINUX_RECLEN_RATIO(buflen); 497 buf = malloc(buflen, M_TEMP, M_WAITOK); 498 499 error = kern_getdirentries(td, args->fd, buf, buflen, 500 &base, NULL, UIO_SYSSPACE); 501 if (error != 0) { 502 error = linux_getdents_error(td, args->fd, error); 503 goto out; 504 } 505 if (td->td_retval[0] == 0) 506 goto out; 507 508 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 509 510 bdp = (struct dirent *) buf; 511 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 512 513 linux_dirent = (struct l_dirent*)lbuf; 514 linux_dirent->d_ino = bdp->d_fileno; 515 linux_dirent->d_off = linuxreclen; 516 linux_dirent->d_reclen = bdp->d_namlen; 517 strlcpy(linux_dirent->d_name, bdp->d_name, 518 linuxreclen - offsetof(struct l_dirent, d_name)); 519 error = copyout(linux_dirent, args->dent, linuxreclen); 520 if (error == 0) 521 td->td_retval[0] = linuxreclen; 522 523 free(lbuf, M_TEMP); 524 out: 525 free(buf, M_TEMP); 526 return (error); 527 } 528 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 529 530 531 /* 532 * These exist mainly for hooks for doing /compat/linux translation. 533 */ 534 535 int 536 linux_access(struct thread *td, struct linux_access_args *args) 537 { 538 char *path; 539 int error; 540 541 /* linux convention */ 542 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 543 return (EINVAL); 544 545 LCONVPATHEXIST(td, args->path, &path); 546 547 #ifdef DEBUG 548 if (ldebug(access)) 549 printf(ARGS(access, "%s, %d"), path, args->amode); 550 #endif 551 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0, 552 args->amode); 553 LFREEPATH(path); 554 555 return (error); 556 } 557 558 int 559 linux_faccessat(struct thread *td, struct linux_faccessat_args *args) 560 { 561 char *path; 562 int error, dfd; 563 564 /* linux convention */ 565 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 566 return (EINVAL); 567 568 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 569 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 570 571 #ifdef DEBUG 572 if (ldebug(access)) 573 printf(ARGS(access, "%s, %d"), path, args->amode); 574 #endif 575 576 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode); 577 LFREEPATH(path); 578 579 return (error); 580 } 581 582 int 583 linux_unlink(struct thread *td, struct linux_unlink_args *args) 584 { 585 char *path; 586 int error; 587 struct stat st; 588 589 LCONVPATHEXIST(td, args->path, &path); 590 591 #ifdef DEBUG 592 if (ldebug(unlink)) 593 printf(ARGS(unlink, "%s"), path); 594 #endif 595 596 error = kern_unlinkat(td, AT_FDCWD, path, UIO_SYSSPACE, 0); 597 if (error == EPERM) { 598 /* Introduce POSIX noncompliant behaviour of Linux */ 599 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st, 600 NULL) == 0) { 601 if (S_ISDIR(st.st_mode)) 602 error = EISDIR; 603 } 604 } 605 LFREEPATH(path); 606 return (error); 607 } 608 609 int 610 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args) 611 { 612 char *path; 613 int error, dfd; 614 struct stat st; 615 616 if (args->flag & ~LINUX_AT_REMOVEDIR) 617 return (EINVAL); 618 619 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 620 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 621 622 #ifdef DEBUG 623 if (ldebug(unlinkat)) 624 printf(ARGS(unlinkat, "%s"), path); 625 #endif 626 627 if (args->flag & LINUX_AT_REMOVEDIR) 628 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE); 629 else 630 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0); 631 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) { 632 /* Introduce POSIX noncompliant behaviour of Linux */ 633 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path, 634 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode)) 635 error = EISDIR; 636 } 637 LFREEPATH(path); 638 return (error); 639 } 640 int 641 linux_chdir(struct thread *td, struct linux_chdir_args *args) 642 { 643 char *path; 644 int error; 645 646 LCONVPATHEXIST(td, args->path, &path); 647 648 #ifdef DEBUG 649 if (ldebug(chdir)) 650 printf(ARGS(chdir, "%s"), path); 651 #endif 652 error = kern_chdir(td, path, UIO_SYSSPACE); 653 LFREEPATH(path); 654 return (error); 655 } 656 657 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 } 674 675 int 676 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args) 677 { 678 char *path; 679 int error, dfd; 680 681 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 682 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 683 684 #ifdef DEBUG 685 if (ldebug(fchmodat)) 686 printf(ARGS(fchmodat, "%s, %d"), path, args->mode); 687 #endif 688 689 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0); 690 LFREEPATH(path); 691 return (error); 692 } 693 694 int 695 linux_mkdir(struct thread *td, struct linux_mkdir_args *args) 696 { 697 char *path; 698 int error; 699 700 LCONVPATHCREAT(td, args->path, &path); 701 702 #ifdef DEBUG 703 if (ldebug(mkdir)) 704 printf(ARGS(mkdir, "%s, %d"), path, args->mode); 705 #endif 706 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode); 707 LFREEPATH(path); 708 return (error); 709 } 710 711 int 712 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args) 713 { 714 char *path; 715 int error, dfd; 716 717 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 718 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd); 719 720 #ifdef DEBUG 721 if (ldebug(mkdirat)) 722 printf(ARGS(mkdirat, "%s, %d"), path, args->mode); 723 #endif 724 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode); 725 LFREEPATH(path); 726 return (error); 727 } 728 729 int 730 linux_rmdir(struct thread *td, struct linux_rmdir_args *args) 731 { 732 char *path; 733 int error; 734 735 LCONVPATHEXIST(td, args->path, &path); 736 737 #ifdef DEBUG 738 if (ldebug(rmdir)) 739 printf(ARGS(rmdir, "%s"), path); 740 #endif 741 error = kern_rmdirat(td, AT_FDCWD, path, UIO_SYSSPACE); 742 LFREEPATH(path); 743 return (error); 744 } 745 746 int 747 linux_rename(struct thread *td, struct linux_rename_args *args) 748 { 749 char *from, *to; 750 int error; 751 752 LCONVPATHEXIST(td, args->from, &from); 753 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 754 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 755 if (to == NULL) { 756 LFREEPATH(from); 757 return (error); 758 } 759 760 #ifdef DEBUG 761 if (ldebug(rename)) 762 printf(ARGS(rename, "%s, %s"), from, to); 763 #endif 764 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE); 765 LFREEPATH(from); 766 LFREEPATH(to); 767 return (error); 768 } 769 770 int 771 linux_renameat(struct thread *td, struct linux_renameat_args *args) 772 { 773 char *from, *to; 774 int error, olddfd, newdfd; 775 776 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 777 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 778 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd); 779 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 780 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 781 if (to == NULL) { 782 LFREEPATH(from); 783 return (error); 784 } 785 786 #ifdef DEBUG 787 if (ldebug(renameat)) 788 printf(ARGS(renameat, "%s, %s"), from, to); 789 #endif 790 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE); 791 LFREEPATH(from); 792 LFREEPATH(to); 793 return (error); 794 } 795 796 int 797 linux_symlink(struct thread *td, struct linux_symlink_args *args) 798 { 799 char *path, *to; 800 int error; 801 802 LCONVPATHEXIST(td, args->path, &path); 803 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 804 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 805 if (to == NULL) { 806 LFREEPATH(path); 807 return (error); 808 } 809 810 #ifdef DEBUG 811 if (ldebug(symlink)) 812 printf(ARGS(symlink, "%s, %s"), path, to); 813 #endif 814 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE); 815 LFREEPATH(path); 816 LFREEPATH(to); 817 return (error); 818 } 819 820 int 821 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args) 822 { 823 char *path, *to; 824 int error, dfd; 825 826 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 827 LCONVPATHEXIST(td, args->oldname, &path); 828 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 829 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd); 830 if (to == NULL) { 831 LFREEPATH(path); 832 return (error); 833 } 834 835 #ifdef DEBUG 836 if (ldebug(symlinkat)) 837 printf(ARGS(symlinkat, "%s, %s"), path, to); 838 #endif 839 840 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE); 841 LFREEPATH(path); 842 LFREEPATH(to); 843 return (error); 844 } 845 846 int 847 linux_readlink(struct thread *td, struct linux_readlink_args *args) 848 { 849 char *name; 850 int error; 851 852 LCONVPATHEXIST(td, args->name, &name); 853 854 #ifdef DEBUG 855 if (ldebug(readlink)) 856 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf, 857 args->count); 858 #endif 859 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE, 860 args->buf, UIO_USERSPACE, args->count); 861 LFREEPATH(name); 862 return (error); 863 } 864 865 int 866 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args) 867 { 868 char *name; 869 int error, dfd; 870 871 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 872 LCONVPATHEXIST_AT(td, args->path, &name, dfd); 873 874 #ifdef DEBUG 875 if (ldebug(readlinkat)) 876 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf, 877 args->bufsiz); 878 #endif 879 880 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf, 881 UIO_USERSPACE, args->bufsiz); 882 LFREEPATH(name); 883 return (error); 884 } 885 886 int 887 linux_truncate(struct thread *td, struct linux_truncate_args *args) 888 { 889 char *path; 890 int error; 891 892 LCONVPATHEXIST(td, args->path, &path); 893 894 #ifdef DEBUG 895 if (ldebug(truncate)) 896 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length); 897 #endif 898 899 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 900 LFREEPATH(path); 901 return (error); 902 } 903 904 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 905 int 906 linux_truncate64(struct thread *td, struct linux_truncate64_args *args) 907 { 908 char *path; 909 int error; 910 911 LCONVPATHEXIST(td, args->path, &path); 912 913 #ifdef DEBUG 914 if (ldebug(truncate64)) 915 printf(ARGS(truncate64, "%s, %jd"), path, args->length); 916 #endif 917 918 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 919 LFREEPATH(path); 920 return (error); 921 } 922 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 923 924 int 925 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args) 926 { 927 928 return (kern_ftruncate(td, args->fd, args->length)); 929 } 930 931 int 932 linux_link(struct thread *td, struct linux_link_args *args) 933 { 934 char *path, *to; 935 int error; 936 937 LCONVPATHEXIST(td, args->path, &path); 938 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 939 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 940 if (to == NULL) { 941 LFREEPATH(path); 942 return (error); 943 } 944 945 #ifdef DEBUG 946 if (ldebug(link)) 947 printf(ARGS(link, "%s, %s"), path, to); 948 #endif 949 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE, 950 FOLLOW); 951 LFREEPATH(path); 952 LFREEPATH(to); 953 return (error); 954 } 955 956 int 957 linux_linkat(struct thread *td, struct linux_linkat_args *args) 958 { 959 char *path, *to; 960 int error, olddfd, newdfd, follow; 961 962 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW) 963 return (EINVAL); 964 965 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 966 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 967 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd); 968 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 969 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 970 if (to == NULL) { 971 LFREEPATH(path); 972 return (error); 973 } 974 975 #ifdef DEBUG 976 if (ldebug(linkat)) 977 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path, 978 args->newdfd, to, args->flag); 979 #endif 980 981 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW : 982 FOLLOW; 983 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow); 984 LFREEPATH(path); 985 LFREEPATH(to); 986 return (error); 987 } 988 989 int 990 linux_fdatasync(td, uap) 991 struct thread *td; 992 struct linux_fdatasync_args *uap; 993 { 994 995 return (kern_fsync(td, uap->fd, false)); 996 } 997 998 int 999 linux_pread(struct thread *td, struct linux_pread_args *uap) 1000 { 1001 cap_rights_t rights; 1002 struct vnode *vp; 1003 int error; 1004 1005 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, uap->offset); 1006 if (error == 0) { 1007 /* This seems to violate POSIX but linux does it */ 1008 error = fgetvp(td, uap->fd, 1009 cap_rights_init(&rights, CAP_PREAD), &vp); 1010 if (error != 0) 1011 return (error); 1012 if (vp->v_type == VDIR) { 1013 vrele(vp); 1014 return (EISDIR); 1015 } 1016 vrele(vp); 1017 } 1018 return (error); 1019 } 1020 1021 int 1022 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap) 1023 { 1024 1025 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, uap->offset)); 1026 } 1027 1028 int 1029 linux_preadv(struct thread *td, struct linux_preadv_args *uap) 1030 { 1031 struct uio *auio; 1032 int error; 1033 off_t offset; 1034 1035 /* 1036 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES 1037 * pos_l and pos_h, respectively, contain the 1038 * low order and high order 32 bits of offset. 1039 */ 1040 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1041 (sizeof(offset) * 4)) | uap->pos_l; 1042 if (offset < 0) 1043 return (EINVAL); 1044 #ifdef COMPAT_LINUX32 1045 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1046 #else 1047 error = copyinuio(uap->vec, uap->vlen, &auio); 1048 #endif 1049 if (error != 0) 1050 return (error); 1051 error = kern_preadv(td, uap->fd, auio, offset); 1052 free(auio, M_IOV); 1053 return (error); 1054 } 1055 1056 int 1057 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap) 1058 { 1059 struct uio *auio; 1060 int error; 1061 off_t offset; 1062 1063 /* 1064 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES 1065 * pos_l and pos_h, respectively, contain the 1066 * low order and high order 32 bits of offset. 1067 */ 1068 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1069 (sizeof(offset) * 4)) | uap->pos_l; 1070 if (offset < 0) 1071 return (EINVAL); 1072 #ifdef COMPAT_LINUX32 1073 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1074 #else 1075 error = copyinuio(uap->vec, uap->vlen, &auio); 1076 #endif 1077 if (error != 0) 1078 return (error); 1079 error = kern_pwritev(td, uap->fd, auio, offset); 1080 free(auio, M_IOV); 1081 return (error); 1082 } 1083 1084 int 1085 linux_mount(struct thread *td, struct linux_mount_args *args) 1086 { 1087 char fstypename[MFSNAMELEN]; 1088 char mntonname[MNAMELEN], mntfromname[MNAMELEN]; 1089 int error; 1090 int fsflags; 1091 1092 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1, 1093 NULL); 1094 if (error) 1095 return (error); 1096 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL); 1097 if (error) 1098 return (error); 1099 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL); 1100 if (error) 1101 return (error); 1102 1103 #ifdef DEBUG 1104 if (ldebug(mount)) 1105 printf(ARGS(mount, "%s, %s, %s"), 1106 fstypename, mntfromname, mntonname); 1107 #endif 1108 1109 if (strcmp(fstypename, "ext2") == 0) { 1110 strcpy(fstypename, "ext2fs"); 1111 } else if (strcmp(fstypename, "proc") == 0) { 1112 strcpy(fstypename, "linprocfs"); 1113 } else if (strcmp(fstypename, "vfat") == 0) { 1114 strcpy(fstypename, "msdosfs"); 1115 } 1116 1117 fsflags = 0; 1118 1119 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) { 1120 /* 1121 * Linux SYNC flag is not included; the closest equivalent 1122 * FreeBSD has is !ASYNC, which is our default. 1123 */ 1124 if (args->rwflag & LINUX_MS_RDONLY) 1125 fsflags |= MNT_RDONLY; 1126 if (args->rwflag & LINUX_MS_NOSUID) 1127 fsflags |= MNT_NOSUID; 1128 if (args->rwflag & LINUX_MS_NOEXEC) 1129 fsflags |= MNT_NOEXEC; 1130 if (args->rwflag & LINUX_MS_REMOUNT) 1131 fsflags |= MNT_UPDATE; 1132 } 1133 1134 error = kernel_vmount(fsflags, 1135 "fstype", fstypename, 1136 "fspath", mntonname, 1137 "from", mntfromname, 1138 NULL); 1139 return (error); 1140 } 1141 1142 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1143 int 1144 linux_oldumount(struct thread *td, struct linux_oldumount_args *args) 1145 { 1146 struct linux_umount_args args2; 1147 1148 args2.path = args->path; 1149 args2.flags = 0; 1150 return (linux_umount(td, &args2)); 1151 } 1152 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1153 1154 int 1155 linux_umount(struct thread *td, struct linux_umount_args *args) 1156 { 1157 struct unmount_args bsd; 1158 1159 bsd.path = args->path; 1160 bsd.flags = args->flags; /* XXX correct? */ 1161 return (sys_unmount(td, &bsd)); 1162 } 1163 1164 /* 1165 * fcntl family of syscalls 1166 */ 1167 1168 struct l_flock { 1169 l_short l_type; 1170 l_short l_whence; 1171 l_off_t l_start; 1172 l_off_t l_len; 1173 l_pid_t l_pid; 1174 } 1175 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1176 __packed 1177 #endif 1178 ; 1179 1180 static void 1181 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock) 1182 { 1183 switch (linux_flock->l_type) { 1184 case LINUX_F_RDLCK: 1185 bsd_flock->l_type = F_RDLCK; 1186 break; 1187 case LINUX_F_WRLCK: 1188 bsd_flock->l_type = F_WRLCK; 1189 break; 1190 case LINUX_F_UNLCK: 1191 bsd_flock->l_type = F_UNLCK; 1192 break; 1193 default: 1194 bsd_flock->l_type = -1; 1195 break; 1196 } 1197 bsd_flock->l_whence = linux_flock->l_whence; 1198 bsd_flock->l_start = (off_t)linux_flock->l_start; 1199 bsd_flock->l_len = (off_t)linux_flock->l_len; 1200 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1201 bsd_flock->l_sysid = 0; 1202 } 1203 1204 static void 1205 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock) 1206 { 1207 switch (bsd_flock->l_type) { 1208 case F_RDLCK: 1209 linux_flock->l_type = LINUX_F_RDLCK; 1210 break; 1211 case F_WRLCK: 1212 linux_flock->l_type = LINUX_F_WRLCK; 1213 break; 1214 case F_UNLCK: 1215 linux_flock->l_type = LINUX_F_UNLCK; 1216 break; 1217 } 1218 linux_flock->l_whence = bsd_flock->l_whence; 1219 linux_flock->l_start = (l_off_t)bsd_flock->l_start; 1220 linux_flock->l_len = (l_off_t)bsd_flock->l_len; 1221 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1222 } 1223 1224 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1225 struct l_flock64 { 1226 l_short l_type; 1227 l_short l_whence; 1228 l_loff_t l_start; 1229 l_loff_t l_len; 1230 l_pid_t l_pid; 1231 } 1232 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1233 __packed 1234 #endif 1235 ; 1236 1237 static void 1238 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock) 1239 { 1240 switch (linux_flock->l_type) { 1241 case LINUX_F_RDLCK: 1242 bsd_flock->l_type = F_RDLCK; 1243 break; 1244 case LINUX_F_WRLCK: 1245 bsd_flock->l_type = F_WRLCK; 1246 break; 1247 case LINUX_F_UNLCK: 1248 bsd_flock->l_type = F_UNLCK; 1249 break; 1250 default: 1251 bsd_flock->l_type = -1; 1252 break; 1253 } 1254 bsd_flock->l_whence = linux_flock->l_whence; 1255 bsd_flock->l_start = (off_t)linux_flock->l_start; 1256 bsd_flock->l_len = (off_t)linux_flock->l_len; 1257 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1258 bsd_flock->l_sysid = 0; 1259 } 1260 1261 static void 1262 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock) 1263 { 1264 switch (bsd_flock->l_type) { 1265 case F_RDLCK: 1266 linux_flock->l_type = LINUX_F_RDLCK; 1267 break; 1268 case F_WRLCK: 1269 linux_flock->l_type = LINUX_F_WRLCK; 1270 break; 1271 case F_UNLCK: 1272 linux_flock->l_type = LINUX_F_UNLCK; 1273 break; 1274 } 1275 linux_flock->l_whence = bsd_flock->l_whence; 1276 linux_flock->l_start = (l_loff_t)bsd_flock->l_start; 1277 linux_flock->l_len = (l_loff_t)bsd_flock->l_len; 1278 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1279 } 1280 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1281 1282 static int 1283 fcntl_common(struct thread *td, struct linux_fcntl_args *args) 1284 { 1285 struct l_flock linux_flock; 1286 struct flock bsd_flock; 1287 cap_rights_t rights; 1288 struct file *fp; 1289 long arg; 1290 int error, result; 1291 1292 switch (args->cmd) { 1293 case LINUX_F_DUPFD: 1294 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg)); 1295 1296 case LINUX_F_GETFD: 1297 return (kern_fcntl(td, args->fd, F_GETFD, 0)); 1298 1299 case LINUX_F_SETFD: 1300 return (kern_fcntl(td, args->fd, F_SETFD, args->arg)); 1301 1302 case LINUX_F_GETFL: 1303 error = kern_fcntl(td, args->fd, F_GETFL, 0); 1304 result = td->td_retval[0]; 1305 td->td_retval[0] = 0; 1306 if (result & O_RDONLY) 1307 td->td_retval[0] |= LINUX_O_RDONLY; 1308 if (result & O_WRONLY) 1309 td->td_retval[0] |= LINUX_O_WRONLY; 1310 if (result & O_RDWR) 1311 td->td_retval[0] |= LINUX_O_RDWR; 1312 if (result & O_NDELAY) 1313 td->td_retval[0] |= LINUX_O_NONBLOCK; 1314 if (result & O_APPEND) 1315 td->td_retval[0] |= LINUX_O_APPEND; 1316 if (result & O_FSYNC) 1317 td->td_retval[0] |= LINUX_O_SYNC; 1318 if (result & O_ASYNC) 1319 td->td_retval[0] |= LINUX_FASYNC; 1320 #ifdef LINUX_O_NOFOLLOW 1321 if (result & O_NOFOLLOW) 1322 td->td_retval[0] |= LINUX_O_NOFOLLOW; 1323 #endif 1324 #ifdef LINUX_O_DIRECT 1325 if (result & O_DIRECT) 1326 td->td_retval[0] |= LINUX_O_DIRECT; 1327 #endif 1328 return (error); 1329 1330 case LINUX_F_SETFL: 1331 arg = 0; 1332 if (args->arg & LINUX_O_NDELAY) 1333 arg |= O_NONBLOCK; 1334 if (args->arg & LINUX_O_APPEND) 1335 arg |= O_APPEND; 1336 if (args->arg & LINUX_O_SYNC) 1337 arg |= O_FSYNC; 1338 if (args->arg & LINUX_FASYNC) 1339 arg |= O_ASYNC; 1340 #ifdef LINUX_O_NOFOLLOW 1341 if (args->arg & LINUX_O_NOFOLLOW) 1342 arg |= O_NOFOLLOW; 1343 #endif 1344 #ifdef LINUX_O_DIRECT 1345 if (args->arg & LINUX_O_DIRECT) 1346 arg |= O_DIRECT; 1347 #endif 1348 return (kern_fcntl(td, args->fd, F_SETFL, arg)); 1349 1350 case LINUX_F_GETLK: 1351 error = copyin((void *)args->arg, &linux_flock, 1352 sizeof(linux_flock)); 1353 if (error) 1354 return (error); 1355 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1356 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1357 if (error) 1358 return (error); 1359 bsd_to_linux_flock(&bsd_flock, &linux_flock); 1360 return (copyout(&linux_flock, (void *)args->arg, 1361 sizeof(linux_flock))); 1362 1363 case LINUX_F_SETLK: 1364 error = copyin((void *)args->arg, &linux_flock, 1365 sizeof(linux_flock)); 1366 if (error) 1367 return (error); 1368 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1369 return (kern_fcntl(td, args->fd, F_SETLK, 1370 (intptr_t)&bsd_flock)); 1371 1372 case LINUX_F_SETLKW: 1373 error = copyin((void *)args->arg, &linux_flock, 1374 sizeof(linux_flock)); 1375 if (error) 1376 return (error); 1377 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1378 return (kern_fcntl(td, args->fd, F_SETLKW, 1379 (intptr_t)&bsd_flock)); 1380 1381 case LINUX_F_GETOWN: 1382 return (kern_fcntl(td, args->fd, F_GETOWN, 0)); 1383 1384 case LINUX_F_SETOWN: 1385 /* 1386 * XXX some Linux applications depend on F_SETOWN having no 1387 * significant effect for pipes (SIGIO is not delivered for 1388 * pipes under Linux-2.2.35 at least). 1389 */ 1390 error = fget(td, args->fd, 1391 cap_rights_init(&rights, CAP_FCNTL), &fp); 1392 if (error) 1393 return (error); 1394 if (fp->f_type == DTYPE_PIPE) { 1395 fdrop(fp, td); 1396 return (EINVAL); 1397 } 1398 fdrop(fp, td); 1399 1400 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg)); 1401 1402 case LINUX_F_DUPFD_CLOEXEC: 1403 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg)); 1404 } 1405 1406 return (EINVAL); 1407 } 1408 1409 int 1410 linux_fcntl(struct thread *td, struct linux_fcntl_args *args) 1411 { 1412 1413 #ifdef DEBUG 1414 if (ldebug(fcntl)) 1415 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd); 1416 #endif 1417 1418 return (fcntl_common(td, args)); 1419 } 1420 1421 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1422 int 1423 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args) 1424 { 1425 struct l_flock64 linux_flock; 1426 struct flock bsd_flock; 1427 struct linux_fcntl_args fcntl_args; 1428 int error; 1429 1430 #ifdef DEBUG 1431 if (ldebug(fcntl64)) 1432 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd); 1433 #endif 1434 1435 switch (args->cmd) { 1436 case LINUX_F_GETLK64: 1437 error = copyin((void *)args->arg, &linux_flock, 1438 sizeof(linux_flock)); 1439 if (error) 1440 return (error); 1441 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1442 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1443 if (error) 1444 return (error); 1445 bsd_to_linux_flock64(&bsd_flock, &linux_flock); 1446 return (copyout(&linux_flock, (void *)args->arg, 1447 sizeof(linux_flock))); 1448 1449 case LINUX_F_SETLK64: 1450 error = copyin((void *)args->arg, &linux_flock, 1451 sizeof(linux_flock)); 1452 if (error) 1453 return (error); 1454 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1455 return (kern_fcntl(td, args->fd, F_SETLK, 1456 (intptr_t)&bsd_flock)); 1457 1458 case LINUX_F_SETLKW64: 1459 error = copyin((void *)args->arg, &linux_flock, 1460 sizeof(linux_flock)); 1461 if (error) 1462 return (error); 1463 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1464 return (kern_fcntl(td, args->fd, F_SETLKW, 1465 (intptr_t)&bsd_flock)); 1466 } 1467 1468 fcntl_args.fd = args->fd; 1469 fcntl_args.cmd = args->cmd; 1470 fcntl_args.arg = args->arg; 1471 return (fcntl_common(td, &fcntl_args)); 1472 } 1473 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1474 1475 int 1476 linux_chown(struct thread *td, struct linux_chown_args *args) 1477 { 1478 char *path; 1479 int error; 1480 1481 LCONVPATHEXIST(td, args->path, &path); 1482 1483 #ifdef DEBUG 1484 if (ldebug(chown)) 1485 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid); 1486 #endif 1487 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1488 args->gid, 0); 1489 LFREEPATH(path); 1490 return (error); 1491 } 1492 1493 int 1494 linux_fchownat(struct thread *td, struct linux_fchownat_args *args) 1495 { 1496 char *path; 1497 int error, dfd, flag; 1498 1499 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 1500 return (EINVAL); 1501 1502 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1503 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 1504 1505 #ifdef DEBUG 1506 if (ldebug(fchownat)) 1507 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid); 1508 #endif 1509 1510 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 1511 AT_SYMLINK_NOFOLLOW; 1512 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid, 1513 flag); 1514 LFREEPATH(path); 1515 return (error); 1516 } 1517 1518 int 1519 linux_lchown(struct thread *td, struct linux_lchown_args *args) 1520 { 1521 char *path; 1522 int error; 1523 1524 LCONVPATHEXIST(td, args->path, &path); 1525 1526 #ifdef DEBUG 1527 if (ldebug(lchown)) 1528 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid); 1529 #endif 1530 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1531 args->gid, AT_SYMLINK_NOFOLLOW); 1532 LFREEPATH(path); 1533 return (error); 1534 } 1535 1536 static int 1537 convert_fadvice(int advice) 1538 { 1539 switch (advice) { 1540 case LINUX_POSIX_FADV_NORMAL: 1541 return (POSIX_FADV_NORMAL); 1542 case LINUX_POSIX_FADV_RANDOM: 1543 return (POSIX_FADV_RANDOM); 1544 case LINUX_POSIX_FADV_SEQUENTIAL: 1545 return (POSIX_FADV_SEQUENTIAL); 1546 case LINUX_POSIX_FADV_WILLNEED: 1547 return (POSIX_FADV_WILLNEED); 1548 case LINUX_POSIX_FADV_DONTNEED: 1549 return (POSIX_FADV_DONTNEED); 1550 case LINUX_POSIX_FADV_NOREUSE: 1551 return (POSIX_FADV_NOREUSE); 1552 default: 1553 return (-1); 1554 } 1555 } 1556 1557 int 1558 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args) 1559 { 1560 int advice; 1561 1562 advice = convert_fadvice(args->advice); 1563 if (advice == -1) 1564 return (EINVAL); 1565 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1566 advice)); 1567 } 1568 1569 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1570 int 1571 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args) 1572 { 1573 int advice; 1574 1575 advice = convert_fadvice(args->advice); 1576 if (advice == -1) 1577 return (EINVAL); 1578 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1579 advice)); 1580 } 1581 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1582 1583 int 1584 linux_pipe(struct thread *td, struct linux_pipe_args *args) 1585 { 1586 int fildes[2]; 1587 int error; 1588 1589 #ifdef DEBUG 1590 if (ldebug(pipe)) 1591 printf(ARGS(pipe, "*")); 1592 #endif 1593 1594 error = kern_pipe(td, fildes, 0, NULL, NULL); 1595 if (error != 0) 1596 return (error); 1597 1598 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1599 if (error != 0) { 1600 (void)kern_close(td, fildes[0]); 1601 (void)kern_close(td, fildes[1]); 1602 } 1603 1604 return (error); 1605 } 1606 1607 int 1608 linux_pipe2(struct thread *td, struct linux_pipe2_args *args) 1609 { 1610 int fildes[2]; 1611 int error, flags; 1612 1613 #ifdef DEBUG 1614 if (ldebug(pipe2)) 1615 printf(ARGS(pipe2, "*, %d"), args->flags); 1616 #endif 1617 1618 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0) 1619 return (EINVAL); 1620 1621 flags = 0; 1622 if ((args->flags & LINUX_O_NONBLOCK) != 0) 1623 flags |= O_NONBLOCK; 1624 if ((args->flags & LINUX_O_CLOEXEC) != 0) 1625 flags |= O_CLOEXEC; 1626 error = kern_pipe(td, fildes, flags, NULL, NULL); 1627 if (error != 0) 1628 return (error); 1629 1630 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1631 if (error != 0) { 1632 (void)kern_close(td, fildes[0]); 1633 (void)kern_close(td, fildes[1]); 1634 } 1635 1636 return (error); 1637 } 1638 1639 int 1640 linux_dup3(struct thread *td, struct linux_dup3_args *args) 1641 { 1642 int cmd; 1643 intptr_t newfd; 1644 1645 if (args->oldfd == args->newfd) 1646 return (EINVAL); 1647 if ((args->flags & ~LINUX_O_CLOEXEC) != 0) 1648 return (EINVAL); 1649 if (args->flags & LINUX_O_CLOEXEC) 1650 cmd = F_DUP2FD_CLOEXEC; 1651 else 1652 cmd = F_DUP2FD; 1653 1654 newfd = args->newfd; 1655 return (kern_fcntl(td, args->oldfd, cmd, newfd)); 1656 } 1657 1658 int 1659 linux_fallocate(struct thread *td, struct linux_fallocate_args *args) 1660 { 1661 1662 /* 1663 * We emulate only posix_fallocate system call for which 1664 * mode should be 0. 1665 */ 1666 if (args->mode != 0) 1667 return (ENOSYS); 1668 1669 return (kern_posix_fallocate(td, args->fd, args->offset, 1670 args->len)); 1671 }
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