1 /*- 2 * Copyright (c) 1994-1995 Søren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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 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 #define LINUX_DIRBLKSIZ 512 311 312 /* 313 * Linux l_dirent is bigger than FreeBSD dirent, thus the buffer size 314 * passed to kern_getdirentries() must be smaller than the one passed 315 * to linux_getdents() by certain factor. 316 */ 317 #define LINUX_RECLEN_RATIO(X) X * offsetof(struct dirent, d_name) / \ 318 offsetof(struct l_dirent, d_name); 319 #define LINUX_RECLEN64_RATIO(X) X * offsetof(struct dirent, d_name) / \ 320 offsetof(struct l_dirent64, d_name); 321 322 int 323 linux_getdents(struct thread *td, struct linux_getdents_args *args) 324 { 325 struct dirent *bdp; 326 caddr_t inp, buf; /* BSD-format */ 327 int len, reclen; /* BSD-format */ 328 caddr_t outp; /* Linux-format */ 329 int resid, linuxreclen; /* Linux-format */ 330 caddr_t lbuf; /* Linux-format */ 331 long base; 332 struct l_dirent *linux_dirent; 333 int buflen, error; 334 size_t retval; 335 336 #ifdef DEBUG 337 if (ldebug(getdents)) 338 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count); 339 #endif 340 buflen = LINUX_RECLEN_RATIO(args->count); 341 buflen = min(buflen, MAXBSIZE); 342 buf = malloc(buflen, M_TEMP, M_WAITOK); 343 344 error = kern_getdirentries(td, args->fd, buf, buflen, 345 &base, NULL, UIO_SYSSPACE); 346 if (error != 0) { 347 error = linux_getdents_error(td, args->fd, error); 348 goto out1; 349 } 350 351 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 352 353 len = td->td_retval[0]; 354 inp = buf; 355 outp = (caddr_t)args->dent; 356 resid = args->count; 357 retval = 0; 358 359 while (len > 0) { 360 bdp = (struct dirent *) inp; 361 reclen = bdp->d_reclen; 362 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 363 /* 364 * No more space in the user supplied dirent buffer. 365 * Return EINVAL. 366 */ 367 if (resid < linuxreclen) { 368 error = EINVAL; 369 goto out; 370 } 371 372 linux_dirent = (struct l_dirent*)lbuf; 373 linux_dirent->d_ino = bdp->d_fileno; 374 linux_dirent->d_off = base + reclen; 375 linux_dirent->d_reclen = linuxreclen; 376 /* 377 * Copy d_type to last byte of l_dirent buffer 378 */ 379 lbuf[linuxreclen - 1] = bdp->d_type; 380 strlcpy(linux_dirent->d_name, bdp->d_name, 381 linuxreclen - offsetof(struct l_dirent, d_name)-1); 382 error = copyout(linux_dirent, outp, linuxreclen); 383 if (error != 0) 384 goto out; 385 386 inp += reclen; 387 base += reclen; 388 len -= reclen; 389 390 retval += linuxreclen; 391 outp += linuxreclen; 392 resid -= linuxreclen; 393 } 394 td->td_retval[0] = retval; 395 396 out: 397 free(lbuf, M_LINUX); 398 out1: 399 free(buf, M_LINUX); 400 return (error); 401 } 402 403 int 404 linux_getdents64(struct thread *td, struct linux_getdents64_args *args) 405 { 406 struct dirent *bdp; 407 caddr_t inp, buf; /* BSD-format */ 408 int len, reclen; /* BSD-format */ 409 caddr_t outp; /* Linux-format */ 410 int resid, linuxreclen; /* Linux-format */ 411 caddr_t lbuf; /* Linux-format */ 412 long base; 413 struct l_dirent64 *linux_dirent64; 414 int buflen, error; 415 size_t retval; 416 417 #ifdef DEBUG 418 if (ldebug(getdents64)) 419 uprintf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count); 420 #endif 421 buflen = LINUX_RECLEN64_RATIO(args->count); 422 buflen = min(buflen, MAXBSIZE); 423 buf = malloc(buflen, M_TEMP, M_WAITOK); 424 425 error = kern_getdirentries(td, args->fd, buf, buflen, 426 &base, NULL, UIO_SYSSPACE); 427 if (error != 0) { 428 error = linux_getdents_error(td, args->fd, error); 429 goto out1; 430 } 431 432 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 433 434 len = td->td_retval[0]; 435 inp = buf; 436 outp = (caddr_t)args->dirent; 437 resid = args->count; 438 retval = 0; 439 440 while (len > 0) { 441 bdp = (struct dirent *) inp; 442 reclen = bdp->d_reclen; 443 linuxreclen = LINUX_RECLEN64(bdp->d_namlen); 444 /* 445 * No more space in the user supplied dirent buffer. 446 * Return EINVAL. 447 */ 448 if (resid < linuxreclen) { 449 error = EINVAL; 450 goto out; 451 } 452 453 linux_dirent64 = (struct l_dirent64*)lbuf; 454 linux_dirent64->d_ino = bdp->d_fileno; 455 linux_dirent64->d_off = base + reclen; 456 linux_dirent64->d_reclen = linuxreclen; 457 linux_dirent64->d_type = bdp->d_type; 458 strlcpy(linux_dirent64->d_name, bdp->d_name, 459 linuxreclen - offsetof(struct l_dirent64, d_name)); 460 error = copyout(linux_dirent64, outp, linuxreclen); 461 if (error != 0) 462 goto out; 463 464 inp += reclen; 465 base += reclen; 466 len -= reclen; 467 468 retval += linuxreclen; 469 outp += linuxreclen; 470 resid -= linuxreclen; 471 } 472 td->td_retval[0] = retval; 473 474 out: 475 free(lbuf, M_TEMP); 476 out1: 477 free(buf, M_TEMP); 478 return (error); 479 } 480 481 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 482 int 483 linux_readdir(struct thread *td, struct linux_readdir_args *args) 484 { 485 struct dirent *bdp; 486 caddr_t buf; /* BSD-format */ 487 int linuxreclen; /* Linux-format */ 488 caddr_t lbuf; /* Linux-format */ 489 long base; 490 struct l_dirent *linux_dirent; 491 int buflen, error; 492 493 #ifdef DEBUG 494 if (ldebug(readdir)) 495 printf(ARGS(readdir, "%d, *"), args->fd); 496 #endif 497 buflen = LINUX_RECLEN(LINUX_NAME_MAX); 498 buflen = LINUX_RECLEN_RATIO(buflen); 499 buf = malloc(buflen, M_TEMP, M_WAITOK); 500 501 error = kern_getdirentries(td, args->fd, buf, buflen, 502 &base, NULL, UIO_SYSSPACE); 503 if (error != 0) { 504 error = linux_getdents_error(td, args->fd, error); 505 goto out; 506 } 507 if (td->td_retval[0] == 0) 508 goto out; 509 510 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO); 511 512 bdp = (struct dirent *) buf; 513 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 514 515 linux_dirent = (struct l_dirent*)lbuf; 516 linux_dirent->d_ino = bdp->d_fileno; 517 linux_dirent->d_off = linuxreclen; 518 linux_dirent->d_reclen = bdp->d_namlen; 519 strlcpy(linux_dirent->d_name, bdp->d_name, 520 linuxreclen - offsetof(struct l_dirent, d_name)); 521 error = copyout(linux_dirent, args->dent, linuxreclen); 522 if (error == 0) 523 td->td_retval[0] = linuxreclen; 524 525 free(lbuf, M_LINUX); 526 out: 527 free(buf, M_LINUX); 528 return (error); 529 } 530 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 531 532 533 /* 534 * These exist mainly for hooks for doing /compat/linux translation. 535 */ 536 537 int 538 linux_access(struct thread *td, struct linux_access_args *args) 539 { 540 char *path; 541 int error; 542 543 /* linux convention */ 544 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 545 return (EINVAL); 546 547 LCONVPATHEXIST(td, args->path, &path); 548 549 #ifdef DEBUG 550 if (ldebug(access)) 551 printf(ARGS(access, "%s, %d"), path, args->amode); 552 #endif 553 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0, 554 args->amode); 555 LFREEPATH(path); 556 557 return (error); 558 } 559 560 int 561 linux_faccessat(struct thread *td, struct linux_faccessat_args *args) 562 { 563 char *path; 564 int error, dfd; 565 566 /* linux convention */ 567 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 568 return (EINVAL); 569 570 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 571 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 572 573 #ifdef DEBUG 574 if (ldebug(access)) 575 printf(ARGS(access, "%s, %d"), path, args->amode); 576 #endif 577 578 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode); 579 LFREEPATH(path); 580 581 return (error); 582 } 583 584 int 585 linux_unlink(struct thread *td, struct linux_unlink_args *args) 586 { 587 char *path; 588 int error; 589 struct stat st; 590 591 LCONVPATHEXIST(td, args->path, &path); 592 593 #ifdef DEBUG 594 if (ldebug(unlink)) 595 printf(ARGS(unlink, "%s"), path); 596 #endif 597 598 error = kern_unlinkat(td, AT_FDCWD, path, UIO_SYSSPACE, 0); 599 if (error == EPERM) { 600 /* Introduce POSIX noncompliant behaviour of Linux */ 601 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st, 602 NULL) == 0) { 603 if (S_ISDIR(st.st_mode)) 604 error = EISDIR; 605 } 606 } 607 LFREEPATH(path); 608 return (error); 609 } 610 611 int 612 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args) 613 { 614 char *path; 615 int error, dfd; 616 struct stat st; 617 618 if (args->flag & ~LINUX_AT_REMOVEDIR) 619 return (EINVAL); 620 621 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 622 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 623 624 #ifdef DEBUG 625 if (ldebug(unlinkat)) 626 printf(ARGS(unlinkat, "%s"), path); 627 #endif 628 629 if (args->flag & LINUX_AT_REMOVEDIR) 630 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE); 631 else 632 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0); 633 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) { 634 /* Introduce POSIX noncompliant behaviour of Linux */ 635 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path, 636 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode)) 637 error = EISDIR; 638 } 639 LFREEPATH(path); 640 return (error); 641 } 642 int 643 linux_chdir(struct thread *td, struct linux_chdir_args *args) 644 { 645 char *path; 646 int error; 647 648 LCONVPATHEXIST(td, args->path, &path); 649 650 #ifdef DEBUG 651 if (ldebug(chdir)) 652 printf(ARGS(chdir, "%s"), path); 653 #endif 654 error = kern_chdir(td, path, UIO_SYSSPACE); 655 LFREEPATH(path); 656 return (error); 657 } 658 659 int 660 linux_chmod(struct thread *td, struct linux_chmod_args *args) 661 { 662 char *path; 663 int error; 664 665 LCONVPATHEXIST(td, args->path, &path); 666 667 #ifdef DEBUG 668 if (ldebug(chmod)) 669 printf(ARGS(chmod, "%s, %d"), path, args->mode); 670 #endif 671 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE, 672 args->mode, 0); 673 LFREEPATH(path); 674 return (error); 675 } 676 677 int 678 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args) 679 { 680 char *path; 681 int error, dfd; 682 683 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 684 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 685 686 #ifdef DEBUG 687 if (ldebug(fchmodat)) 688 printf(ARGS(fchmodat, "%s, %d"), path, args->mode); 689 #endif 690 691 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0); 692 LFREEPATH(path); 693 return (error); 694 } 695 696 int 697 linux_mkdir(struct thread *td, struct linux_mkdir_args *args) 698 { 699 char *path; 700 int error; 701 702 LCONVPATHCREAT(td, args->path, &path); 703 704 #ifdef DEBUG 705 if (ldebug(mkdir)) 706 printf(ARGS(mkdir, "%s, %d"), path, args->mode); 707 #endif 708 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode); 709 LFREEPATH(path); 710 return (error); 711 } 712 713 int 714 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args) 715 { 716 char *path; 717 int error, dfd; 718 719 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 720 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd); 721 722 #ifdef DEBUG 723 if (ldebug(mkdirat)) 724 printf(ARGS(mkdirat, "%s, %d"), path, args->mode); 725 #endif 726 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode); 727 LFREEPATH(path); 728 return (error); 729 } 730 731 int 732 linux_rmdir(struct thread *td, struct linux_rmdir_args *args) 733 { 734 char *path; 735 int error; 736 737 LCONVPATHEXIST(td, args->path, &path); 738 739 #ifdef DEBUG 740 if (ldebug(rmdir)) 741 printf(ARGS(rmdir, "%s"), path); 742 #endif 743 error = kern_rmdirat(td, AT_FDCWD, path, UIO_SYSSPACE); 744 LFREEPATH(path); 745 return (error); 746 } 747 748 int 749 linux_rename(struct thread *td, struct linux_rename_args *args) 750 { 751 char *from, *to; 752 int error; 753 754 LCONVPATHEXIST(td, args->from, &from); 755 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 756 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 757 if (to == NULL) { 758 LFREEPATH(from); 759 return (error); 760 } 761 762 #ifdef DEBUG 763 if (ldebug(rename)) 764 printf(ARGS(rename, "%s, %s"), from, to); 765 #endif 766 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE); 767 LFREEPATH(from); 768 LFREEPATH(to); 769 return (error); 770 } 771 772 int 773 linux_renameat(struct thread *td, struct linux_renameat_args *args) 774 { 775 char *from, *to; 776 int error, olddfd, newdfd; 777 778 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 779 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 780 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd); 781 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */ 782 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 783 if (to == NULL) { 784 LFREEPATH(from); 785 return (error); 786 } 787 788 #ifdef DEBUG 789 if (ldebug(renameat)) 790 printf(ARGS(renameat, "%s, %s"), from, to); 791 #endif 792 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE); 793 LFREEPATH(from); 794 LFREEPATH(to); 795 return (error); 796 } 797 798 int 799 linux_symlink(struct thread *td, struct linux_symlink_args *args) 800 { 801 char *path, *to; 802 int error; 803 804 LCONVPATHEXIST(td, args->path, &path); 805 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 806 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 807 if (to == NULL) { 808 LFREEPATH(path); 809 return (error); 810 } 811 812 #ifdef DEBUG 813 if (ldebug(symlink)) 814 printf(ARGS(symlink, "%s, %s"), path, to); 815 #endif 816 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE); 817 LFREEPATH(path); 818 LFREEPATH(to); 819 return (error); 820 } 821 822 int 823 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args) 824 { 825 char *path, *to; 826 int error, dfd; 827 828 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 829 LCONVPATHEXIST_AT(td, args->oldname, &path, dfd); 830 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 831 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd); 832 if (to == NULL) { 833 LFREEPATH(path); 834 return (error); 835 } 836 837 #ifdef DEBUG 838 if (ldebug(symlinkat)) 839 printf(ARGS(symlinkat, "%s, %s"), path, to); 840 #endif 841 842 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE); 843 LFREEPATH(path); 844 LFREEPATH(to); 845 return (error); 846 } 847 848 int 849 linux_readlink(struct thread *td, struct linux_readlink_args *args) 850 { 851 char *name; 852 int error; 853 854 LCONVPATHEXIST(td, args->name, &name); 855 856 #ifdef DEBUG 857 if (ldebug(readlink)) 858 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf, 859 args->count); 860 #endif 861 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE, 862 args->buf, UIO_USERSPACE, args->count); 863 LFREEPATH(name); 864 return (error); 865 } 866 867 int 868 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args) 869 { 870 char *name; 871 int error, dfd; 872 873 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 874 LCONVPATHEXIST_AT(td, args->path, &name, dfd); 875 876 #ifdef DEBUG 877 if (ldebug(readlinkat)) 878 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf, 879 args->bufsiz); 880 #endif 881 882 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf, 883 UIO_USERSPACE, args->bufsiz); 884 LFREEPATH(name); 885 return (error); 886 } 887 888 int 889 linux_truncate(struct thread *td, struct linux_truncate_args *args) 890 { 891 char *path; 892 int error; 893 894 LCONVPATHEXIST(td, args->path, &path); 895 896 #ifdef DEBUG 897 if (ldebug(truncate)) 898 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length); 899 #endif 900 901 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 902 LFREEPATH(path); 903 return (error); 904 } 905 906 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 907 int 908 linux_truncate64(struct thread *td, struct linux_truncate64_args *args) 909 { 910 char *path; 911 int error; 912 913 LCONVPATHEXIST(td, args->path, &path); 914 915 #ifdef DEBUG 916 if (ldebug(truncate64)) 917 printf(ARGS(truncate64, "%s, %jd"), path, args->length); 918 #endif 919 920 error = kern_truncate(td, path, UIO_SYSSPACE, args->length); 921 LFREEPATH(path); 922 return (error); 923 } 924 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 925 926 int 927 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args) 928 { 929 930 return (kern_ftruncate(td, args->fd, args->length)); 931 } 932 933 int 934 linux_link(struct thread *td, struct linux_link_args *args) 935 { 936 char *path, *to; 937 int error; 938 939 LCONVPATHEXIST(td, args->path, &path); 940 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 941 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD); 942 if (to == NULL) { 943 LFREEPATH(path); 944 return (error); 945 } 946 947 #ifdef DEBUG 948 if (ldebug(link)) 949 printf(ARGS(link, "%s, %s"), path, to); 950 #endif 951 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE, 952 FOLLOW); 953 LFREEPATH(path); 954 LFREEPATH(to); 955 return (error); 956 } 957 958 int 959 linux_linkat(struct thread *td, struct linux_linkat_args *args) 960 { 961 char *path, *to; 962 int error, olddfd, newdfd, follow; 963 964 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW) 965 return (EINVAL); 966 967 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 968 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 969 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd); 970 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */ 971 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd); 972 if (to == NULL) { 973 LFREEPATH(path); 974 return (error); 975 } 976 977 #ifdef DEBUG 978 if (ldebug(linkat)) 979 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path, 980 args->newdfd, to, args->flag); 981 #endif 982 983 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW : 984 FOLLOW; 985 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow); 986 LFREEPATH(path); 987 LFREEPATH(to); 988 return (error); 989 } 990 991 int 992 linux_fdatasync(td, uap) 993 struct thread *td; 994 struct linux_fdatasync_args *uap; 995 { 996 997 return (kern_fsync(td, uap->fd, false)); 998 } 999 1000 int 1001 linux_pread(struct thread *td, struct linux_pread_args *uap) 1002 { 1003 cap_rights_t rights; 1004 struct vnode *vp; 1005 int error; 1006 1007 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, uap->offset); 1008 if (error == 0) { 1009 /* This seems to violate POSIX but linux does it */ 1010 error = fgetvp(td, uap->fd, 1011 cap_rights_init(&rights, CAP_PREAD), &vp); 1012 if (error != 0) 1013 return (error); 1014 if (vp->v_type == VDIR) { 1015 vrele(vp); 1016 return (EISDIR); 1017 } 1018 vrele(vp); 1019 } 1020 return (error); 1021 } 1022 1023 int 1024 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap) 1025 { 1026 1027 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, uap->offset)); 1028 } 1029 1030 int 1031 linux_preadv(struct thread *td, struct linux_preadv_args *uap) 1032 { 1033 struct uio *auio; 1034 int error; 1035 off_t offset; 1036 1037 /* 1038 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES 1039 * pos_l and pos_h, respectively, contain the 1040 * low order and high order 32 bits of offset. 1041 */ 1042 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1043 (sizeof(offset) * 4)) | uap->pos_l; 1044 if (offset < 0) 1045 return (EINVAL); 1046 #ifdef COMPAT_LINUX32 1047 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1048 #else 1049 error = copyinuio(uap->vec, uap->vlen, &auio); 1050 #endif 1051 if (error != 0) 1052 return (error); 1053 error = kern_preadv(td, uap->fd, auio, offset); 1054 free(auio, M_IOV); 1055 return (error); 1056 } 1057 1058 int 1059 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap) 1060 { 1061 struct uio *auio; 1062 int error; 1063 off_t offset; 1064 1065 /* 1066 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES 1067 * pos_l and pos_h, respectively, contain the 1068 * low order and high order 32 bits of offset. 1069 */ 1070 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) << 1071 (sizeof(offset) * 4)) | uap->pos_l; 1072 if (offset < 0) 1073 return (EINVAL); 1074 #ifdef COMPAT_LINUX32 1075 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1076 #else 1077 error = copyinuio(uap->vec, uap->vlen, &auio); 1078 #endif 1079 if (error != 0) 1080 return (error); 1081 error = kern_pwritev(td, uap->fd, auio, offset); 1082 free(auio, M_IOV); 1083 return (error); 1084 } 1085 1086 int 1087 linux_mount(struct thread *td, struct linux_mount_args *args) 1088 { 1089 char fstypename[MFSNAMELEN]; 1090 char mntonname[MNAMELEN], mntfromname[MNAMELEN]; 1091 int error; 1092 int fsflags; 1093 1094 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1, 1095 NULL); 1096 if (error) 1097 return (error); 1098 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL); 1099 if (error) 1100 return (error); 1101 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL); 1102 if (error) 1103 return (error); 1104 1105 #ifdef DEBUG 1106 if (ldebug(mount)) 1107 printf(ARGS(mount, "%s, %s, %s"), 1108 fstypename, mntfromname, mntonname); 1109 #endif 1110 1111 if (strcmp(fstypename, "ext2") == 0) { 1112 strcpy(fstypename, "ext2fs"); 1113 } else if (strcmp(fstypename, "proc") == 0) { 1114 strcpy(fstypename, "linprocfs"); 1115 } else if (strcmp(fstypename, "vfat") == 0) { 1116 strcpy(fstypename, "msdosfs"); 1117 } 1118 1119 fsflags = 0; 1120 1121 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) { 1122 /* 1123 * Linux SYNC flag is not included; the closest equivalent 1124 * FreeBSD has is !ASYNC, which is our default. 1125 */ 1126 if (args->rwflag & LINUX_MS_RDONLY) 1127 fsflags |= MNT_RDONLY; 1128 if (args->rwflag & LINUX_MS_NOSUID) 1129 fsflags |= MNT_NOSUID; 1130 if (args->rwflag & LINUX_MS_NOEXEC) 1131 fsflags |= MNT_NOEXEC; 1132 if (args->rwflag & LINUX_MS_REMOUNT) 1133 fsflags |= MNT_UPDATE; 1134 } 1135 1136 error = kernel_vmount(fsflags, 1137 "fstype", fstypename, 1138 "fspath", mntonname, 1139 "from", mntfromname, 1140 NULL); 1141 return (error); 1142 } 1143 1144 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1145 int 1146 linux_oldumount(struct thread *td, struct linux_oldumount_args *args) 1147 { 1148 struct linux_umount_args args2; 1149 1150 args2.path = args->path; 1151 args2.flags = 0; 1152 return (linux_umount(td, &args2)); 1153 } 1154 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1155 1156 int 1157 linux_umount(struct thread *td, struct linux_umount_args *args) 1158 { 1159 struct unmount_args bsd; 1160 1161 bsd.path = args->path; 1162 bsd.flags = args->flags; /* XXX correct? */ 1163 return (sys_unmount(td, &bsd)); 1164 } 1165 1166 /* 1167 * fcntl family of syscalls 1168 */ 1169 1170 struct l_flock { 1171 l_short l_type; 1172 l_short l_whence; 1173 l_off_t l_start; 1174 l_off_t l_len; 1175 l_pid_t l_pid; 1176 } 1177 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1178 __packed 1179 #endif 1180 ; 1181 1182 static void 1183 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock) 1184 { 1185 switch (linux_flock->l_type) { 1186 case LINUX_F_RDLCK: 1187 bsd_flock->l_type = F_RDLCK; 1188 break; 1189 case LINUX_F_WRLCK: 1190 bsd_flock->l_type = F_WRLCK; 1191 break; 1192 case LINUX_F_UNLCK: 1193 bsd_flock->l_type = F_UNLCK; 1194 break; 1195 default: 1196 bsd_flock->l_type = -1; 1197 break; 1198 } 1199 bsd_flock->l_whence = linux_flock->l_whence; 1200 bsd_flock->l_start = (off_t)linux_flock->l_start; 1201 bsd_flock->l_len = (off_t)linux_flock->l_len; 1202 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1203 bsd_flock->l_sysid = 0; 1204 } 1205 1206 static void 1207 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock) 1208 { 1209 switch (bsd_flock->l_type) { 1210 case F_RDLCK: 1211 linux_flock->l_type = LINUX_F_RDLCK; 1212 break; 1213 case F_WRLCK: 1214 linux_flock->l_type = LINUX_F_WRLCK; 1215 break; 1216 case F_UNLCK: 1217 linux_flock->l_type = LINUX_F_UNLCK; 1218 break; 1219 } 1220 linux_flock->l_whence = bsd_flock->l_whence; 1221 linux_flock->l_start = (l_off_t)bsd_flock->l_start; 1222 linux_flock->l_len = (l_off_t)bsd_flock->l_len; 1223 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1224 } 1225 1226 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1227 struct l_flock64 { 1228 l_short l_type; 1229 l_short l_whence; 1230 l_loff_t l_start; 1231 l_loff_t l_len; 1232 l_pid_t l_pid; 1233 } 1234 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1235 __packed 1236 #endif 1237 ; 1238 1239 static void 1240 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock) 1241 { 1242 switch (linux_flock->l_type) { 1243 case LINUX_F_RDLCK: 1244 bsd_flock->l_type = F_RDLCK; 1245 break; 1246 case LINUX_F_WRLCK: 1247 bsd_flock->l_type = F_WRLCK; 1248 break; 1249 case LINUX_F_UNLCK: 1250 bsd_flock->l_type = F_UNLCK; 1251 break; 1252 default: 1253 bsd_flock->l_type = -1; 1254 break; 1255 } 1256 bsd_flock->l_whence = linux_flock->l_whence; 1257 bsd_flock->l_start = (off_t)linux_flock->l_start; 1258 bsd_flock->l_len = (off_t)linux_flock->l_len; 1259 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1260 bsd_flock->l_sysid = 0; 1261 } 1262 1263 static void 1264 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock) 1265 { 1266 switch (bsd_flock->l_type) { 1267 case F_RDLCK: 1268 linux_flock->l_type = LINUX_F_RDLCK; 1269 break; 1270 case F_WRLCK: 1271 linux_flock->l_type = LINUX_F_WRLCK; 1272 break; 1273 case F_UNLCK: 1274 linux_flock->l_type = LINUX_F_UNLCK; 1275 break; 1276 } 1277 linux_flock->l_whence = bsd_flock->l_whence; 1278 linux_flock->l_start = (l_loff_t)bsd_flock->l_start; 1279 linux_flock->l_len = (l_loff_t)bsd_flock->l_len; 1280 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1281 } 1282 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1283 1284 static int 1285 fcntl_common(struct thread *td, struct linux_fcntl_args *args) 1286 { 1287 struct l_flock linux_flock; 1288 struct flock bsd_flock; 1289 cap_rights_t rights; 1290 struct file *fp; 1291 long arg; 1292 int error, result; 1293 1294 switch (args->cmd) { 1295 case LINUX_F_DUPFD: 1296 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg)); 1297 1298 case LINUX_F_GETFD: 1299 return (kern_fcntl(td, args->fd, F_GETFD, 0)); 1300 1301 case LINUX_F_SETFD: 1302 return (kern_fcntl(td, args->fd, F_SETFD, args->arg)); 1303 1304 case LINUX_F_GETFL: 1305 error = kern_fcntl(td, args->fd, F_GETFL, 0); 1306 result = td->td_retval[0]; 1307 td->td_retval[0] = 0; 1308 if (result & O_RDONLY) 1309 td->td_retval[0] |= LINUX_O_RDONLY; 1310 if (result & O_WRONLY) 1311 td->td_retval[0] |= LINUX_O_WRONLY; 1312 if (result & O_RDWR) 1313 td->td_retval[0] |= LINUX_O_RDWR; 1314 if (result & O_NDELAY) 1315 td->td_retval[0] |= LINUX_O_NONBLOCK; 1316 if (result & O_APPEND) 1317 td->td_retval[0] |= LINUX_O_APPEND; 1318 if (result & O_FSYNC) 1319 td->td_retval[0] |= LINUX_O_SYNC; 1320 if (result & O_ASYNC) 1321 td->td_retval[0] |= LINUX_FASYNC; 1322 #ifdef LINUX_O_NOFOLLOW 1323 if (result & O_NOFOLLOW) 1324 td->td_retval[0] |= LINUX_O_NOFOLLOW; 1325 #endif 1326 #ifdef LINUX_O_DIRECT 1327 if (result & O_DIRECT) 1328 td->td_retval[0] |= LINUX_O_DIRECT; 1329 #endif 1330 return (error); 1331 1332 case LINUX_F_SETFL: 1333 arg = 0; 1334 if (args->arg & LINUX_O_NDELAY) 1335 arg |= O_NONBLOCK; 1336 if (args->arg & LINUX_O_APPEND) 1337 arg |= O_APPEND; 1338 if (args->arg & LINUX_O_SYNC) 1339 arg |= O_FSYNC; 1340 if (args->arg & LINUX_FASYNC) 1341 arg |= O_ASYNC; 1342 #ifdef LINUX_O_NOFOLLOW 1343 if (args->arg & LINUX_O_NOFOLLOW) 1344 arg |= O_NOFOLLOW; 1345 #endif 1346 #ifdef LINUX_O_DIRECT 1347 if (args->arg & LINUX_O_DIRECT) 1348 arg |= O_DIRECT; 1349 #endif 1350 return (kern_fcntl(td, args->fd, F_SETFL, arg)); 1351 1352 case LINUX_F_GETLK: 1353 error = copyin((void *)args->arg, &linux_flock, 1354 sizeof(linux_flock)); 1355 if (error) 1356 return (error); 1357 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1358 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1359 if (error) 1360 return (error); 1361 bsd_to_linux_flock(&bsd_flock, &linux_flock); 1362 return (copyout(&linux_flock, (void *)args->arg, 1363 sizeof(linux_flock))); 1364 1365 case LINUX_F_SETLK: 1366 error = copyin((void *)args->arg, &linux_flock, 1367 sizeof(linux_flock)); 1368 if (error) 1369 return (error); 1370 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1371 return (kern_fcntl(td, args->fd, F_SETLK, 1372 (intptr_t)&bsd_flock)); 1373 1374 case LINUX_F_SETLKW: 1375 error = copyin((void *)args->arg, &linux_flock, 1376 sizeof(linux_flock)); 1377 if (error) 1378 return (error); 1379 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1380 return (kern_fcntl(td, args->fd, F_SETLKW, 1381 (intptr_t)&bsd_flock)); 1382 1383 case LINUX_F_GETOWN: 1384 return (kern_fcntl(td, args->fd, F_GETOWN, 0)); 1385 1386 case LINUX_F_SETOWN: 1387 /* 1388 * XXX some Linux applications depend on F_SETOWN having no 1389 * significant effect for pipes (SIGIO is not delivered for 1390 * pipes under Linux-2.2.35 at least). 1391 */ 1392 error = fget(td, args->fd, 1393 cap_rights_init(&rights, CAP_FCNTL), &fp); 1394 if (error) 1395 return (error); 1396 if (fp->f_type == DTYPE_PIPE) { 1397 fdrop(fp, td); 1398 return (EINVAL); 1399 } 1400 fdrop(fp, td); 1401 1402 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg)); 1403 1404 case LINUX_F_DUPFD_CLOEXEC: 1405 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg)); 1406 } 1407 1408 return (EINVAL); 1409 } 1410 1411 int 1412 linux_fcntl(struct thread *td, struct linux_fcntl_args *args) 1413 { 1414 1415 #ifdef DEBUG 1416 if (ldebug(fcntl)) 1417 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd); 1418 #endif 1419 1420 return (fcntl_common(td, args)); 1421 } 1422 1423 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1424 int 1425 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args) 1426 { 1427 struct l_flock64 linux_flock; 1428 struct flock bsd_flock; 1429 struct linux_fcntl_args fcntl_args; 1430 int error; 1431 1432 #ifdef DEBUG 1433 if (ldebug(fcntl64)) 1434 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd); 1435 #endif 1436 1437 switch (args->cmd) { 1438 case LINUX_F_GETLK64: 1439 error = copyin((void *)args->arg, &linux_flock, 1440 sizeof(linux_flock)); 1441 if (error) 1442 return (error); 1443 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1444 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1445 if (error) 1446 return (error); 1447 bsd_to_linux_flock64(&bsd_flock, &linux_flock); 1448 return (copyout(&linux_flock, (void *)args->arg, 1449 sizeof(linux_flock))); 1450 1451 case LINUX_F_SETLK64: 1452 error = copyin((void *)args->arg, &linux_flock, 1453 sizeof(linux_flock)); 1454 if (error) 1455 return (error); 1456 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1457 return (kern_fcntl(td, args->fd, F_SETLK, 1458 (intptr_t)&bsd_flock)); 1459 1460 case LINUX_F_SETLKW64: 1461 error = copyin((void *)args->arg, &linux_flock, 1462 sizeof(linux_flock)); 1463 if (error) 1464 return (error); 1465 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1466 return (kern_fcntl(td, args->fd, F_SETLKW, 1467 (intptr_t)&bsd_flock)); 1468 } 1469 1470 fcntl_args.fd = args->fd; 1471 fcntl_args.cmd = args->cmd; 1472 fcntl_args.arg = args->arg; 1473 return (fcntl_common(td, &fcntl_args)); 1474 } 1475 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1476 1477 int 1478 linux_chown(struct thread *td, struct linux_chown_args *args) 1479 { 1480 char *path; 1481 int error; 1482 1483 LCONVPATHEXIST(td, args->path, &path); 1484 1485 #ifdef DEBUG 1486 if (ldebug(chown)) 1487 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid); 1488 #endif 1489 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1490 args->gid, 0); 1491 LFREEPATH(path); 1492 return (error); 1493 } 1494 1495 int 1496 linux_fchownat(struct thread *td, struct linux_fchownat_args *args) 1497 { 1498 char *path; 1499 int error, dfd, flag; 1500 1501 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 1502 return (EINVAL); 1503 1504 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1505 LCONVPATHEXIST_AT(td, args->filename, &path, dfd); 1506 1507 #ifdef DEBUG 1508 if (ldebug(fchownat)) 1509 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid); 1510 #endif 1511 1512 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 1513 AT_SYMLINK_NOFOLLOW; 1514 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid, 1515 flag); 1516 LFREEPATH(path); 1517 return (error); 1518 } 1519 1520 int 1521 linux_lchown(struct thread *td, struct linux_lchown_args *args) 1522 { 1523 char *path; 1524 int error; 1525 1526 LCONVPATHEXIST(td, args->path, &path); 1527 1528 #ifdef DEBUG 1529 if (ldebug(lchown)) 1530 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid); 1531 #endif 1532 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, 1533 args->gid, AT_SYMLINK_NOFOLLOW); 1534 LFREEPATH(path); 1535 return (error); 1536 } 1537 1538 static int 1539 convert_fadvice(int advice) 1540 { 1541 switch (advice) { 1542 case LINUX_POSIX_FADV_NORMAL: 1543 return (POSIX_FADV_NORMAL); 1544 case LINUX_POSIX_FADV_RANDOM: 1545 return (POSIX_FADV_RANDOM); 1546 case LINUX_POSIX_FADV_SEQUENTIAL: 1547 return (POSIX_FADV_SEQUENTIAL); 1548 case LINUX_POSIX_FADV_WILLNEED: 1549 return (POSIX_FADV_WILLNEED); 1550 case LINUX_POSIX_FADV_DONTNEED: 1551 return (POSIX_FADV_DONTNEED); 1552 case LINUX_POSIX_FADV_NOREUSE: 1553 return (POSIX_FADV_NOREUSE); 1554 default: 1555 return (-1); 1556 } 1557 } 1558 1559 int 1560 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args) 1561 { 1562 int advice; 1563 1564 advice = convert_fadvice(args->advice); 1565 if (advice == -1) 1566 return (EINVAL); 1567 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1568 advice)); 1569 } 1570 1571 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1572 int 1573 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args) 1574 { 1575 int advice; 1576 1577 advice = convert_fadvice(args->advice); 1578 if (advice == -1) 1579 return (EINVAL); 1580 return (kern_posix_fadvise(td, args->fd, args->offset, args->len, 1581 advice)); 1582 } 1583 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1584 1585 int 1586 linux_pipe(struct thread *td, struct linux_pipe_args *args) 1587 { 1588 int fildes[2]; 1589 int error; 1590 1591 #ifdef DEBUG 1592 if (ldebug(pipe)) 1593 printf(ARGS(pipe, "*")); 1594 #endif 1595 1596 error = kern_pipe(td, fildes, 0, NULL, NULL); 1597 if (error != 0) 1598 return (error); 1599 1600 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1601 if (error != 0) { 1602 (void)kern_close(td, fildes[0]); 1603 (void)kern_close(td, fildes[1]); 1604 } 1605 1606 return (error); 1607 } 1608 1609 int 1610 linux_pipe2(struct thread *td, struct linux_pipe2_args *args) 1611 { 1612 int fildes[2]; 1613 int error, flags; 1614 1615 #ifdef DEBUG 1616 if (ldebug(pipe2)) 1617 printf(ARGS(pipe2, "*, %d"), args->flags); 1618 #endif 1619 1620 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0) 1621 return (EINVAL); 1622 1623 flags = 0; 1624 if ((args->flags & LINUX_O_NONBLOCK) != 0) 1625 flags |= O_NONBLOCK; 1626 if ((args->flags & LINUX_O_CLOEXEC) != 0) 1627 flags |= O_CLOEXEC; 1628 error = kern_pipe(td, fildes, flags, NULL, NULL); 1629 if (error != 0) 1630 return (error); 1631 1632 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1633 if (error != 0) { 1634 (void)kern_close(td, fildes[0]); 1635 (void)kern_close(td, fildes[1]); 1636 } 1637 1638 return (error); 1639 } 1640 1641 int 1642 linux_dup3(struct thread *td, struct linux_dup3_args *args) 1643 { 1644 int cmd; 1645 intptr_t newfd; 1646 1647 if (args->oldfd == args->newfd) 1648 return (EINVAL); 1649 if ((args->flags & ~LINUX_O_CLOEXEC) != 0) 1650 return (EINVAL); 1651 if (args->flags & LINUX_O_CLOEXEC) 1652 cmd = F_DUP2FD_CLOEXEC; 1653 else 1654 cmd = F_DUP2FD; 1655 1656 newfd = args->newfd; 1657 return (kern_fcntl(td, args->oldfd, cmd, newfd)); 1658 } 1659 1660 int 1661 linux_fallocate(struct thread *td, struct linux_fallocate_args *args) 1662 { 1663 1664 /* 1665 * We emulate only posix_fallocate system call for which 1666 * mode should be 0. 1667 */ 1668 if (args->mode != 0) 1669 return (ENOSYS); 1670 1671 return (kern_posix_fallocate(td, args->fd, args->offset, 1672 args->len)); 1673 } 1674