1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 30 #include <sys/systm.h> 31 #include <sys/dirent.h> 32 #include <sys/fcntl.h> 33 #include <sys/file.h> 34 #include <sys/filedesc.h> 35 #include <sys/inotify.h> 36 #include <sys/lock.h> 37 #include <sys/mman.h> 38 #include <sys/selinfo.h> 39 #include <sys/pipe.h> 40 #include <sys/proc.h> 41 #include <sys/specialfd.h> 42 #include <sys/stat.h> 43 #include <sys/sx.h> 44 #include <sys/syscallsubr.h> 45 #include <sys/sysproto.h> 46 #include <sys/tty.h> 47 #include <sys/unistd.h> 48 #include <sys/vnode.h> 49 50 #ifdef COMPAT_LINUX32 51 #include <compat/freebsd32/freebsd32_misc.h> 52 #include <compat/freebsd32/freebsd32_util.h> 53 #include <machine/../linux32/linux.h> 54 #include <machine/../linux32/linux32_proto.h> 55 #else 56 #include <machine/../linux/linux.h> 57 #include <machine/../linux/linux_proto.h> 58 #endif 59 #include <compat/linux/linux_misc.h> 60 #include <compat/linux/linux_util.h> 61 #include <compat/linux/linux_file.h> 62 63 static int linux_common_open(struct thread *, int, const char *, int, int, 64 enum uio_seg); 65 static int linux_do_accessat(struct thread *t, int, const char *, int, int); 66 static int linux_getdents_error(struct thread *, int, int); 67 68 static struct bsd_to_linux_bitmap seal_bitmap[] = { 69 BITMAP_1t1_LINUX(F_SEAL_SEAL), 70 BITMAP_1t1_LINUX(F_SEAL_SHRINK), 71 BITMAP_1t1_LINUX(F_SEAL_GROW), 72 BITMAP_1t1_LINUX(F_SEAL_WRITE), 73 }; 74 75 #define MFD_HUGETLB_ENTRY(_size) \ 76 { \ 77 .bsd_value = MFD_HUGE_##_size, \ 78 .linux_value = LINUX_HUGETLB_FLAG_ENCODE_##_size \ 79 } 80 static struct bsd_to_linux_bitmap mfd_bitmap[] = { 81 BITMAP_1t1_LINUX(MFD_CLOEXEC), 82 BITMAP_1t1_LINUX(MFD_ALLOW_SEALING), 83 BITMAP_1t1_LINUX(MFD_HUGETLB), 84 MFD_HUGETLB_ENTRY(64KB), 85 MFD_HUGETLB_ENTRY(512KB), 86 MFD_HUGETLB_ENTRY(1MB), 87 MFD_HUGETLB_ENTRY(2MB), 88 MFD_HUGETLB_ENTRY(8MB), 89 MFD_HUGETLB_ENTRY(16MB), 90 MFD_HUGETLB_ENTRY(32MB), 91 MFD_HUGETLB_ENTRY(256MB), 92 MFD_HUGETLB_ENTRY(512MB), 93 MFD_HUGETLB_ENTRY(1GB), 94 MFD_HUGETLB_ENTRY(2GB), 95 MFD_HUGETLB_ENTRY(16GB), 96 }; 97 #undef MFD_HUGETLB_ENTRY 98 99 #ifdef LINUX_LEGACY_SYSCALLS 100 int 101 linux_creat(struct thread *td, struct linux_creat_args *args) 102 { 103 104 return (kern_openat(td, AT_FDCWD, args->path, UIO_USERSPACE, 105 O_WRONLY | O_CREAT | O_TRUNC, args->mode)); 106 } 107 #endif 108 109 int 110 linux_common_openflags(int l_flags) 111 { 112 int bsd_flags; 113 114 bsd_flags = 0; 115 switch (l_flags & LINUX_O_ACCMODE) { 116 case LINUX_O_WRONLY: 117 bsd_flags |= O_WRONLY; 118 break; 119 case LINUX_O_RDWR: 120 bsd_flags |= O_RDWR; 121 break; 122 default: 123 bsd_flags |= O_RDONLY; 124 } 125 if (l_flags & LINUX_O_NDELAY) 126 bsd_flags |= O_NONBLOCK; 127 if (l_flags & LINUX_O_APPEND) 128 bsd_flags |= O_APPEND; 129 if (l_flags & LINUX_O_SYNC) 130 bsd_flags |= O_FSYNC; 131 if (l_flags & LINUX_O_CLOEXEC) 132 bsd_flags |= O_CLOEXEC; 133 if (l_flags & LINUX_O_NONBLOCK) 134 bsd_flags |= O_NONBLOCK; 135 if (l_flags & LINUX_O_ASYNC) 136 bsd_flags |= O_ASYNC; 137 if (l_flags & LINUX_O_CREAT) 138 bsd_flags |= O_CREAT; 139 if (l_flags & LINUX_O_TRUNC) 140 bsd_flags |= O_TRUNC; 141 if (l_flags & LINUX_O_EXCL) 142 bsd_flags |= O_EXCL; 143 if (l_flags & LINUX_O_NOCTTY) 144 bsd_flags |= O_NOCTTY; 145 if (l_flags & LINUX_O_DIRECT) 146 bsd_flags |= O_DIRECT; 147 if (l_flags & LINUX_O_NOFOLLOW) 148 bsd_flags |= O_NOFOLLOW; 149 if (l_flags & LINUX_O_DIRECTORY) 150 bsd_flags |= O_DIRECTORY; 151 if (l_flags & LINUX_O_PATH) 152 bsd_flags |= O_PATH; 153 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */ 154 return (bsd_flags); 155 } 156 157 static int 158 linux_common_open(struct thread *td, int dirfd, const char *path, int l_flags, 159 int mode, enum uio_seg seg) 160 { 161 struct proc *p = td->td_proc; 162 struct file *fp; 163 int fd; 164 int bsd_flags, error; 165 166 bsd_flags = linux_common_openflags(l_flags); 167 error = kern_openat(td, dirfd, path, seg, bsd_flags, mode); 168 if (error != 0) { 169 if (error == EMLINK) 170 error = ELOOP; 171 goto done; 172 } 173 if (p->p_flag & P_CONTROLT) 174 goto done; 175 if (bsd_flags & O_NOCTTY) 176 goto done; 177 178 /* 179 * XXX In between kern_openat() and fget(), another process 180 * having the same filedesc could use that fd without 181 * checking below. 182 */ 183 fd = td->td_retval[0]; 184 if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) { 185 if (fp->f_type != DTYPE_VNODE) { 186 fdrop(fp, td); 187 goto done; 188 } 189 sx_slock(&proctree_lock); 190 PROC_LOCK(p); 191 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 192 PROC_UNLOCK(p); 193 sx_sunlock(&proctree_lock); 194 /* XXXPJD: Verify if TIOCSCTTY is allowed. */ 195 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, 196 td->td_ucred, td); 197 } else { 198 PROC_UNLOCK(p); 199 sx_sunlock(&proctree_lock); 200 } 201 fdrop(fp, td); 202 } 203 204 done: 205 return (error); 206 } 207 208 int 209 linux_openat(struct thread *td, struct linux_openat_args *args) 210 { 211 int dfd; 212 213 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 214 return (linux_common_open(td, dfd, args->filename, args->flags, 215 args->mode, UIO_USERSPACE)); 216 } 217 218 #ifdef LINUX_LEGACY_SYSCALLS 219 int 220 linux_open(struct thread *td, struct linux_open_args *args) 221 { 222 223 return (linux_common_open(td, AT_FDCWD, args->path, args->flags, 224 args->mode, UIO_USERSPACE)); 225 } 226 #endif 227 228 int 229 linux_name_to_handle_at(struct thread *td, 230 struct linux_name_to_handle_at_args *args) 231 { 232 static const l_int valid_flags = (LINUX_AT_SYMLINK_FOLLOW | 233 LINUX_AT_EMPTY_PATH); 234 static const l_uint fh_size = sizeof(fhandle_t); 235 236 fhandle_t fh; 237 l_uint fh_bytes; 238 l_int mount_id; 239 int error, fd, bsd_flags; 240 241 if (args->flags & ~valid_flags) 242 return (EINVAL); 243 244 fd = args->dirfd; 245 if (fd == LINUX_AT_FDCWD) 246 fd = AT_FDCWD; 247 248 bsd_flags = 0; 249 if (!(args->flags & LINUX_AT_SYMLINK_FOLLOW)) 250 bsd_flags |= AT_SYMLINK_NOFOLLOW; 251 if ((args->flags & LINUX_AT_EMPTY_PATH) != 0) 252 bsd_flags |= AT_EMPTY_PATH; 253 254 error = kern_getfhat(td, bsd_flags, fd, args->name, 255 UIO_USERSPACE, &fh, UIO_SYSSPACE); 256 if (error != 0) 257 return (error); 258 259 /* Emit mount_id -- required before EOVERFLOW case. */ 260 mount_id = (fh.fh_fsid.val[0] ^ fh.fh_fsid.val[1]); 261 error = copyout(&mount_id, args->mnt_id, sizeof(mount_id)); 262 if (error != 0) 263 return (error); 264 265 /* Check if there is room for handle. */ 266 error = copyin(&args->handle->handle_bytes, &fh_bytes, 267 sizeof(fh_bytes)); 268 if (error != 0) 269 return (error); 270 271 if (fh_bytes < fh_size) { 272 error = copyout(&fh_size, &args->handle->handle_bytes, 273 sizeof(fh_size)); 274 if (error == 0) 275 error = EOVERFLOW; 276 return (error); 277 } 278 279 /* Emit handle. */ 280 mount_id = 0; 281 /* 282 * We don't use handle_type for anything yet, but initialize a known 283 * value. 284 */ 285 error = copyout(&mount_id, &args->handle->handle_type, 286 sizeof(mount_id)); 287 if (error != 0) 288 return (error); 289 290 error = copyout(&fh, &args->handle->f_handle, 291 sizeof(fh)); 292 return (error); 293 } 294 295 int 296 linux_open_by_handle_at(struct thread *td, 297 struct linux_open_by_handle_at_args *args) 298 { 299 l_uint fh_bytes; 300 int bsd_flags, error; 301 302 error = copyin(&args->handle->handle_bytes, &fh_bytes, 303 sizeof(fh_bytes)); 304 if (error != 0) 305 return (error); 306 307 if (fh_bytes < sizeof(fhandle_t)) 308 return (EINVAL); 309 310 bsd_flags = linux_common_openflags(args->flags); 311 return (kern_fhopen(td, (void *)&args->handle->f_handle, bsd_flags)); 312 } 313 314 int 315 linux_lseek(struct thread *td, struct linux_lseek_args *args) 316 { 317 318 return (kern_lseek(td, args->fdes, args->off, args->whence)); 319 } 320 321 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 322 int 323 linux_llseek(struct thread *td, struct linux_llseek_args *args) 324 { 325 int error; 326 off_t off; 327 328 off = (args->olow) | (((off_t) args->ohigh) << 32); 329 330 error = kern_lseek(td, args->fd, off, args->whence); 331 if (error != 0) 332 return (error); 333 334 error = copyout(td->td_retval, args->res, sizeof(off_t)); 335 if (error != 0) 336 return (error); 337 338 td->td_retval[0] = 0; 339 return (0); 340 } 341 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 342 343 /* 344 * Note that linux_getdents(2) and linux_getdents64(2) have the same 345 * arguments. They only differ in the definition of struct dirent they 346 * operate on. 347 * Note that linux_readdir(2) is a special case of linux_getdents(2) 348 * where count is always equals 1, meaning that the buffer is one 349 * dirent-structure in size and that the code can't handle more anyway. 350 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2) 351 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will 352 * trash user stack. 353 */ 354 355 static int 356 linux_getdents_error(struct thread *td, int fd, int err) 357 { 358 struct vnode *vp; 359 struct file *fp; 360 int error; 361 362 /* Linux return ENOTDIR in case when fd is not a directory. */ 363 error = getvnode(td, fd, &cap_read_rights, &fp); 364 if (error != 0) 365 return (error); 366 vp = fp->f_vnode; 367 if (vp->v_type != VDIR) { 368 fdrop(fp, td); 369 return (ENOTDIR); 370 } 371 fdrop(fp, td); 372 return (err); 373 } 374 375 struct l_dirent { 376 l_ulong d_ino; 377 l_off_t d_off; 378 l_ushort d_reclen; 379 char d_name[LINUX_NAME_MAX + 1]; 380 }; 381 382 struct l_dirent64 { 383 uint64_t d_ino; 384 int64_t d_off; 385 l_ushort d_reclen; 386 u_char d_type; 387 char d_name[LINUX_NAME_MAX + 1]; 388 }; 389 390 /* 391 * Linux uses the last byte in the dirent buffer to store d_type, 392 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes. 393 */ 394 #define LINUX_RECLEN(namlen) \ 395 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong)) 396 397 #define LINUX_RECLEN64(namlen) \ 398 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \ 399 sizeof(uint64_t)) 400 401 #ifdef LINUX_LEGACY_SYSCALLS 402 int 403 linux_getdents(struct thread *td, struct linux_getdents_args *args) 404 { 405 struct dirent *bdp; 406 caddr_t inp, buf; /* BSD-format */ 407 int len, reclen; /* BSD-format */ 408 caddr_t outp; /* Linux-format */ 409 int resid, linuxreclen; /* Linux-format */ 410 caddr_t lbuf; /* Linux-format */ 411 off_t base; 412 struct l_dirent *linux_dirent; 413 int buflen, error; 414 size_t retval; 415 416 buflen = min(args->count, MAXBSIZE); 417 buf = malloc(buflen, M_LINUX, M_WAITOK); 418 419 error = kern_getdirentries(td, args->fd, buf, buflen, 420 &base, NULL, UIO_SYSSPACE); 421 if (error != 0) { 422 error = linux_getdents_error(td, args->fd, error); 423 goto out1; 424 } 425 426 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_LINUX, M_WAITOK | M_ZERO); 427 428 len = td->td_retval[0]; 429 inp = buf; 430 outp = (caddr_t)args->dent; 431 resid = args->count; 432 retval = 0; 433 434 while (len > 0) { 435 bdp = (struct dirent *) inp; 436 reclen = bdp->d_reclen; 437 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 438 /* 439 * No more space in the user supplied dirent buffer. 440 * Return EINVAL. 441 */ 442 if (resid < linuxreclen) { 443 error = EINVAL; 444 goto out; 445 } 446 447 linux_dirent = (struct l_dirent*)lbuf; 448 linux_dirent->d_ino = bdp->d_fileno; 449 linux_dirent->d_off = bdp->d_off; 450 linux_dirent->d_reclen = linuxreclen; 451 /* 452 * Copy d_type to last byte of l_dirent buffer 453 */ 454 lbuf[linuxreclen - 1] = bdp->d_type; 455 strlcpy(linux_dirent->d_name, bdp->d_name, 456 linuxreclen - offsetof(struct l_dirent, d_name)-1); 457 error = copyout(linux_dirent, outp, linuxreclen); 458 if (error != 0) 459 goto out; 460 461 inp += reclen; 462 base += reclen; 463 len -= reclen; 464 465 retval += linuxreclen; 466 outp += linuxreclen; 467 resid -= linuxreclen; 468 } 469 td->td_retval[0] = retval; 470 471 out: 472 free(lbuf, M_LINUX); 473 out1: 474 free(buf, M_LINUX); 475 return (error); 476 } 477 #endif 478 479 int 480 linux_getdents64(struct thread *td, struct linux_getdents64_args *args) 481 { 482 struct dirent *bdp; 483 caddr_t inp, buf; /* BSD-format */ 484 int len, reclen; /* BSD-format */ 485 caddr_t outp; /* Linux-format */ 486 int resid, linuxreclen; /* Linux-format */ 487 off_t base; 488 struct l_dirent64 *linux_dirent64; 489 int buflen, error; 490 size_t retval; 491 492 buflen = min(args->count, MAXBSIZE); 493 buf = malloc(buflen, M_LINUX, M_WAITOK); 494 495 error = kern_getdirentries(td, args->fd, buf, buflen, 496 &base, NULL, UIO_SYSSPACE); 497 if (error != 0) { 498 error = linux_getdents_error(td, args->fd, error); 499 goto out1; 500 } 501 502 linux_dirent64 = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_LINUX, 503 M_WAITOK | M_ZERO); 504 505 len = td->td_retval[0]; 506 inp = buf; 507 outp = (caddr_t)args->dirent; 508 resid = args->count; 509 retval = 0; 510 511 while (len > 0) { 512 bdp = (struct dirent *) inp; 513 reclen = bdp->d_reclen; 514 linuxreclen = LINUX_RECLEN64(bdp->d_namlen); 515 /* 516 * No more space in the user supplied dirent buffer. 517 * Return EINVAL. 518 */ 519 if (resid < linuxreclen) { 520 error = EINVAL; 521 goto out; 522 } 523 524 linux_dirent64->d_ino = bdp->d_fileno; 525 linux_dirent64->d_off = bdp->d_off; 526 linux_dirent64->d_reclen = linuxreclen; 527 linux_dirent64->d_type = bdp->d_type; 528 strlcpy(linux_dirent64->d_name, bdp->d_name, 529 linuxreclen - offsetof(struct l_dirent64, d_name)); 530 error = copyout(linux_dirent64, outp, linuxreclen); 531 if (error != 0) 532 goto out; 533 534 inp += reclen; 535 base += reclen; 536 len -= reclen; 537 538 retval += linuxreclen; 539 outp += linuxreclen; 540 resid -= linuxreclen; 541 } 542 td->td_retval[0] = retval; 543 544 out: 545 free(linux_dirent64, M_LINUX); 546 out1: 547 free(buf, M_LINUX); 548 return (error); 549 } 550 551 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 552 int 553 linux_readdir(struct thread *td, struct linux_readdir_args *args) 554 { 555 struct dirent *bdp; 556 caddr_t buf; /* BSD-format */ 557 int linuxreclen; /* Linux-format */ 558 off_t base; 559 struct l_dirent *linux_dirent; /* Linux-format */ 560 int buflen, error; 561 562 buflen = sizeof(*bdp); 563 buf = malloc(buflen, M_LINUX, M_WAITOK); 564 565 error = kern_getdirentries(td, args->fd, buf, buflen, 566 &base, NULL, UIO_SYSSPACE); 567 if (error != 0) { 568 error = linux_getdents_error(td, args->fd, error); 569 goto out; 570 } 571 if (td->td_retval[0] == 0) 572 goto out; 573 574 linux_dirent = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_LINUX, 575 M_WAITOK | M_ZERO); 576 577 bdp = (struct dirent *) buf; 578 linuxreclen = LINUX_RECLEN(bdp->d_namlen); 579 580 linux_dirent->d_ino = bdp->d_fileno; 581 linux_dirent->d_off = bdp->d_off; 582 linux_dirent->d_reclen = bdp->d_namlen; 583 strlcpy(linux_dirent->d_name, bdp->d_name, 584 linuxreclen - offsetof(struct l_dirent, d_name)); 585 error = copyout(linux_dirent, args->dent, linuxreclen); 586 if (error == 0) 587 td->td_retval[0] = linuxreclen; 588 589 free(linux_dirent, M_LINUX); 590 out: 591 free(buf, M_LINUX); 592 return (error); 593 } 594 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 595 596 /* 597 * These exist mainly for hooks for doing /compat/linux translation. 598 */ 599 600 #ifdef LINUX_LEGACY_SYSCALLS 601 int 602 linux_access(struct thread *td, struct linux_access_args *args) 603 { 604 605 /* Linux convention. */ 606 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK)) 607 return (EINVAL); 608 609 return (kern_accessat(td, AT_FDCWD, args->path, UIO_USERSPACE, 0, 610 args->amode)); 611 } 612 #endif 613 614 static int 615 linux_do_accessat(struct thread *td, int ldfd, const char *filename, 616 int amode, int flags) 617 { 618 int dfd; 619 620 /* Linux convention. */ 621 if (amode & ~(F_OK | X_OK | W_OK | R_OK)) 622 return (EINVAL); 623 624 dfd = (ldfd == LINUX_AT_FDCWD) ? AT_FDCWD : ldfd; 625 return (kern_accessat(td, dfd, filename, UIO_USERSPACE, flags, amode)); 626 } 627 628 int 629 linux_faccessat(struct thread *td, struct linux_faccessat_args *args) 630 { 631 632 return (linux_do_accessat(td, args->dfd, args->filename, args->amode, 633 0)); 634 } 635 636 int 637 linux_faccessat2(struct thread *td, struct linux_faccessat2_args *args) 638 { 639 int flags, unsupported; 640 641 unsupported = args->flags & ~(LINUX_AT_EACCESS | LINUX_AT_EMPTY_PATH | 642 LINUX_AT_SYMLINK_NOFOLLOW); 643 if (unsupported != 0) { 644 linux_msg(td, "faccessat2 unsupported flag 0x%x", unsupported); 645 return (EINVAL); 646 } 647 648 flags = (args->flags & LINUX_AT_EACCESS) == 0 ? 0 : 649 AT_EACCESS; 650 flags |= (args->flags & LINUX_AT_EMPTY_PATH) == 0 ? 0 : 651 AT_EMPTY_PATH; 652 flags |= (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 653 AT_SYMLINK_NOFOLLOW; 654 return (linux_do_accessat(td, args->dfd, args->filename, args->amode, 655 flags)); 656 } 657 658 659 #ifdef LINUX_LEGACY_SYSCALLS 660 int 661 linux_unlink(struct thread *td, struct linux_unlink_args *args) 662 { 663 int error; 664 struct stat st; 665 666 error = kern_funlinkat(td, AT_FDCWD, args->path, FD_NONE, 667 UIO_USERSPACE, 0, 0); 668 if (error == EPERM) { 669 /* Introduce POSIX noncompliant behaviour of Linux */ 670 if (kern_statat(td, 0, AT_FDCWD, args->path, 671 UIO_USERSPACE, &st) == 0) { 672 if (S_ISDIR(st.st_mode)) 673 error = EISDIR; 674 } 675 } 676 677 return (error); 678 } 679 #endif 680 681 static int 682 linux_unlinkat_impl(struct thread *td, enum uio_seg pathseg, const char *path, 683 int dfd, struct linux_unlinkat_args *args) 684 { 685 struct stat st; 686 int error; 687 688 if (args->flag & LINUX_AT_REMOVEDIR) 689 error = kern_frmdirat(td, dfd, path, FD_NONE, pathseg, 0); 690 else 691 error = kern_funlinkat(td, dfd, path, FD_NONE, pathseg, 0, 0); 692 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) { 693 /* Introduce POSIX noncompliant behaviour of Linux */ 694 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path, 695 pathseg, &st) == 0 && S_ISDIR(st.st_mode)) 696 error = EISDIR; 697 } 698 return (error); 699 } 700 701 int 702 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args) 703 { 704 int dfd; 705 706 if (args->flag & ~LINUX_AT_REMOVEDIR) 707 return (EINVAL); 708 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 709 return (linux_unlinkat_impl(td, UIO_USERSPACE, args->pathname, 710 dfd, args)); 711 } 712 713 int 714 linux_chdir(struct thread *td, struct linux_chdir_args *args) 715 { 716 717 return (kern_chdir(td, args->path, UIO_USERSPACE)); 718 } 719 720 #ifdef LINUX_LEGACY_SYSCALLS 721 int 722 linux_chmod(struct thread *td, struct linux_chmod_args *args) 723 { 724 725 return (kern_fchmodat(td, AT_FDCWD, args->path, UIO_USERSPACE, 726 args->mode, 0)); 727 } 728 #endif 729 730 int 731 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args) 732 { 733 int dfd; 734 735 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 736 return (kern_fchmodat(td, dfd, args->filename, UIO_USERSPACE, 737 args->mode, 0)); 738 } 739 740 #ifdef LINUX_LEGACY_SYSCALLS 741 int 742 linux_mkdir(struct thread *td, struct linux_mkdir_args *args) 743 { 744 745 return (kern_mkdirat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->mode)); 746 } 747 #endif 748 749 int 750 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args) 751 { 752 int dfd; 753 754 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 755 return (kern_mkdirat(td, dfd, args->pathname, UIO_USERSPACE, args->mode)); 756 } 757 758 #ifdef LINUX_LEGACY_SYSCALLS 759 int 760 linux_rmdir(struct thread *td, struct linux_rmdir_args *args) 761 { 762 763 return (kern_frmdirat(td, AT_FDCWD, args->path, FD_NONE, 764 UIO_USERSPACE, 0)); 765 } 766 767 int 768 linux_rename(struct thread *td, struct linux_rename_args *args) 769 { 770 771 return (kern_renameat(td, AT_FDCWD, args->from, AT_FDCWD, 772 args->to, UIO_USERSPACE)); 773 } 774 #endif 775 776 int 777 linux_renameat(struct thread *td, struct linux_renameat_args *args) 778 { 779 struct linux_renameat2_args renameat2_args = { 780 .olddfd = args->olddfd, 781 .oldname = args->oldname, 782 .newdfd = args->newdfd, 783 .newname = args->newname, 784 .flags = 0 785 }; 786 787 return (linux_renameat2(td, &renameat2_args)); 788 } 789 790 int 791 linux_renameat2(struct thread *td, struct linux_renameat2_args *args) 792 { 793 int olddfd, newdfd; 794 795 if (args->flags != 0) { 796 if (args->flags & ~(LINUX_RENAME_EXCHANGE | 797 LINUX_RENAME_NOREPLACE | LINUX_RENAME_WHITEOUT)) 798 return (EINVAL); 799 if (args->flags & LINUX_RENAME_EXCHANGE && 800 args->flags & (LINUX_RENAME_NOREPLACE | 801 LINUX_RENAME_WHITEOUT)) 802 return (EINVAL); 803 #if 0 804 /* 805 * This spams the console on Ubuntu Focal. 806 * 807 * What's needed here is a general mechanism to let users know 808 * about missing features without hogging the system. 809 */ 810 linux_msg(td, "renameat2 unsupported flags 0x%x", 811 args->flags); 812 #endif 813 return (EINVAL); 814 } 815 816 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 817 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 818 return (kern_renameat(td, olddfd, args->oldname, newdfd, 819 args->newname, UIO_USERSPACE)); 820 } 821 822 #ifdef LINUX_LEGACY_SYSCALLS 823 int 824 linux_symlink(struct thread *td, struct linux_symlink_args *args) 825 { 826 827 return (kern_symlinkat(td, args->path, AT_FDCWD, args->to, 828 UIO_USERSPACE)); 829 } 830 #endif 831 832 int 833 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args) 834 { 835 int dfd; 836 837 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 838 return (kern_symlinkat(td, args->oldname, dfd, args->newname, 839 UIO_USERSPACE)); 840 } 841 842 #ifdef LINUX_LEGACY_SYSCALLS 843 int 844 linux_readlink(struct thread *td, struct linux_readlink_args *args) 845 { 846 847 if (args->count <= 0) 848 return (EINVAL); 849 850 return (kern_readlinkat(td, AT_FDCWD, args->name, UIO_USERSPACE, 851 args->buf, UIO_USERSPACE, args->count)); 852 } 853 #endif 854 855 int 856 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args) 857 { 858 int dfd; 859 860 if (args->bufsiz <= 0) 861 return (EINVAL); 862 863 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 864 return (kern_readlinkat(td, dfd, args->path, UIO_USERSPACE, 865 args->buf, UIO_USERSPACE, args->bufsiz)); 866 } 867 868 int 869 linux_truncate(struct thread *td, struct linux_truncate_args *args) 870 { 871 872 return (kern_truncate(td, args->path, UIO_USERSPACE, args->length)); 873 } 874 875 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 876 int 877 linux_truncate64(struct thread *td, struct linux_truncate64_args *args) 878 { 879 off_t length; 880 881 #if defined(__amd64__) && defined(COMPAT_LINUX32) 882 length = PAIR32TO64(off_t, args->length); 883 #else 884 length = args->length; 885 #endif 886 887 return (kern_truncate(td, args->path, UIO_USERSPACE, length)); 888 } 889 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 890 891 int 892 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args) 893 { 894 895 return (kern_ftruncate(td, args->fd, args->length)); 896 } 897 898 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 899 int 900 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 901 { 902 off_t length; 903 904 #if defined(__amd64__) && defined(COMPAT_LINUX32) 905 length = PAIR32TO64(off_t, args->length); 906 #else 907 length = args->length; 908 #endif 909 910 return (kern_ftruncate(td, args->fd, length)); 911 } 912 #endif 913 914 #ifdef LINUX_LEGACY_SYSCALLS 915 int 916 linux_link(struct thread *td, struct linux_link_args *args) 917 { 918 919 return (kern_linkat(td, AT_FDCWD, AT_FDCWD, args->path, args->to, 920 UIO_USERSPACE, AT_SYMLINK_FOLLOW)); 921 } 922 #endif 923 924 int 925 linux_linkat(struct thread *td, struct linux_linkat_args *args) 926 { 927 int olddfd, newdfd, flag; 928 929 if (args->flag & ~(LINUX_AT_SYMLINK_FOLLOW | LINUX_AT_EMPTY_PATH)) 930 return (EINVAL); 931 932 flag = (args->flag & LINUX_AT_SYMLINK_FOLLOW) != 0 ? AT_SYMLINK_FOLLOW : 933 0; 934 flag |= (args->flag & LINUX_AT_EMPTY_PATH) != 0 ? AT_EMPTY_PATH : 0; 935 936 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd; 937 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd; 938 return (kern_linkat(td, olddfd, newdfd, args->oldname, 939 args->newname, UIO_USERSPACE, flag)); 940 } 941 942 int 943 linux_fdatasync(struct thread *td, struct linux_fdatasync_args *uap) 944 { 945 946 return (kern_fsync(td, uap->fd, false)); 947 } 948 949 int 950 linux_sync_file_range(struct thread *td, struct linux_sync_file_range_args *uap) 951 { 952 off_t nbytes, offset; 953 954 #if defined(__amd64__) && defined(COMPAT_LINUX32) 955 nbytes = PAIR32TO64(off_t, uap->nbytes); 956 offset = PAIR32TO64(off_t, uap->offset); 957 #else 958 nbytes = uap->nbytes; 959 offset = uap->offset; 960 #endif 961 962 if (offset < 0 || nbytes < 0 || 963 (uap->flags & ~(LINUX_SYNC_FILE_RANGE_WAIT_BEFORE | 964 LINUX_SYNC_FILE_RANGE_WRITE | 965 LINUX_SYNC_FILE_RANGE_WAIT_AFTER)) != 0) { 966 return (EINVAL); 967 } 968 969 return (kern_fsync(td, uap->fd, false)); 970 } 971 972 int 973 linux_pread(struct thread *td, struct linux_pread_args *uap) 974 { 975 struct vnode *vp; 976 off_t offset; 977 int error; 978 979 #if defined(__amd64__) && defined(COMPAT_LINUX32) 980 offset = PAIR32TO64(off_t, uap->offset); 981 #else 982 offset = uap->offset; 983 #endif 984 985 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, offset); 986 if (error == 0) { 987 /* This seems to violate POSIX but Linux does it. */ 988 error = fgetvp(td, uap->fd, &cap_pread_rights, &vp); 989 if (error != 0) 990 return (error); 991 if (vp->v_type == VDIR) 992 error = EISDIR; 993 vrele(vp); 994 } 995 return (error); 996 } 997 998 int 999 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap) 1000 { 1001 off_t offset; 1002 1003 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1004 offset = PAIR32TO64(off_t, uap->offset); 1005 #else 1006 offset = uap->offset; 1007 #endif 1008 1009 return (linux_enobufs2eagain(td, uap->fd, 1010 kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, offset))); 1011 } 1012 1013 #define HALF_LONG_BITS ((sizeof(l_long) * NBBY / 2)) 1014 1015 static inline off_t 1016 pos_from_hilo(unsigned long high, unsigned long low) 1017 { 1018 1019 return (((off_t)high << HALF_LONG_BITS) << HALF_LONG_BITS) | low; 1020 } 1021 1022 int 1023 linux_preadv(struct thread *td, struct linux_preadv_args *uap) 1024 { 1025 struct uio *auio; 1026 int error; 1027 off_t offset; 1028 1029 /* 1030 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES 1031 * pos_l and pos_h, respectively, contain the 1032 * low order and high order 32 bits of offset. 1033 */ 1034 offset = pos_from_hilo(uap->pos_h, uap->pos_l); 1035 if (offset < 0) 1036 return (EINVAL); 1037 #ifdef COMPAT_LINUX32 1038 error = freebsd32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1039 #else 1040 error = copyinuio(uap->vec, uap->vlen, &auio); 1041 #endif 1042 if (error != 0) 1043 return (error); 1044 error = kern_preadv(td, uap->fd, auio, offset); 1045 freeuio(auio); 1046 return (error); 1047 } 1048 1049 int 1050 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap) 1051 { 1052 struct uio *auio; 1053 int error; 1054 off_t offset; 1055 1056 /* 1057 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES 1058 * pos_l and pos_h, respectively, contain the 1059 * low order and high order 32 bits of offset. 1060 */ 1061 offset = pos_from_hilo(uap->pos_h, uap->pos_l); 1062 if (offset < 0) 1063 return (EINVAL); 1064 #ifdef COMPAT_LINUX32 1065 error = freebsd32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio); 1066 #else 1067 error = copyinuio(uap->vec, uap->vlen, &auio); 1068 #endif 1069 if (error != 0) 1070 return (error); 1071 error = kern_pwritev(td, uap->fd, auio, offset); 1072 freeuio(auio); 1073 return (linux_enobufs2eagain(td, uap->fd, error)); 1074 } 1075 1076 int 1077 linux_mount(struct thread *td, struct linux_mount_args *args) 1078 { 1079 struct mntarg *ma = NULL; 1080 char *fstypename, *mntonname, *mntfromname, *data; 1081 int error, fsflags; 1082 1083 fstypename = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1084 mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1085 mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1086 data = NULL; 1087 error = copyinstr(args->filesystemtype, fstypename, MNAMELEN - 1, 1088 NULL); 1089 if (error != 0) 1090 goto out; 1091 if (args->specialfile != NULL) { 1092 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL); 1093 if (error != 0) 1094 goto out; 1095 } else { 1096 mntfromname[0] = '\0'; 1097 } 1098 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL); 1099 if (error != 0) 1100 goto out; 1101 1102 if (strcmp(fstypename, "ext2") == 0) { 1103 strcpy(fstypename, "ext2fs"); 1104 } else if (strcmp(fstypename, "proc") == 0) { 1105 strcpy(fstypename, "linprocfs"); 1106 } else if (strcmp(fstypename, "vfat") == 0) { 1107 strcpy(fstypename, "msdosfs"); 1108 } else if (strcmp(fstypename, "fuse") == 0 || 1109 strncmp(fstypename, "fuse.", 5) == 0) { 1110 char *fuse_options, *fuse_option, *fuse_name; 1111 1112 strcpy(mntfromname, "/dev/fuse"); 1113 strcpy(fstypename, "fusefs"); 1114 data = malloc(MNAMELEN, M_TEMP, M_WAITOK); 1115 error = copyinstr(args->data, data, MNAMELEN - 1, NULL); 1116 if (error != 0) 1117 goto out; 1118 1119 fuse_options = data; 1120 while ((fuse_option = strsep(&fuse_options, ",")) != NULL) { 1121 fuse_name = strsep(&fuse_option, "="); 1122 if (fuse_name == NULL || fuse_option == NULL) 1123 goto out; 1124 ma = mount_arg(ma, fuse_name, fuse_option, -1); 1125 } 1126 1127 /* 1128 * The FUSE server uses Linux errno values instead of FreeBSD 1129 * ones; add a flag to tell fuse(4) to do errno translation. 1130 */ 1131 ma = mount_arg(ma, "linux_errnos", "1", -1); 1132 } 1133 1134 fsflags = 0; 1135 1136 /* 1137 * Linux SYNC flag is not included; the closest equivalent 1138 * FreeBSD has is !ASYNC, which is our default. 1139 */ 1140 if (args->rwflag & LINUX_MS_RDONLY) 1141 fsflags |= MNT_RDONLY; 1142 if (args->rwflag & LINUX_MS_NOSUID) 1143 fsflags |= MNT_NOSUID; 1144 if (args->rwflag & LINUX_MS_NOEXEC) 1145 fsflags |= MNT_NOEXEC; 1146 if (args->rwflag & LINUX_MS_REMOUNT) 1147 fsflags |= MNT_UPDATE; 1148 1149 ma = mount_arg(ma, "fstype", fstypename, -1); 1150 ma = mount_arg(ma, "fspath", mntonname, -1); 1151 ma = mount_arg(ma, "from", mntfromname, -1); 1152 error = kernel_mount(ma, fsflags); 1153 out: 1154 free(fstypename, M_TEMP); 1155 free(mntonname, M_TEMP); 1156 free(mntfromname, M_TEMP); 1157 free(data, M_TEMP); 1158 return (error); 1159 } 1160 1161 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1162 int 1163 linux_oldumount(struct thread *td, struct linux_oldumount_args *args) 1164 { 1165 1166 return (kern_unmount(td, args->path, 0)); 1167 } 1168 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1169 1170 #ifdef LINUX_LEGACY_SYSCALLS 1171 int 1172 linux_umount(struct thread *td, struct linux_umount_args *args) 1173 { 1174 int flags; 1175 1176 flags = 0; 1177 if ((args->flags & LINUX_MNT_FORCE) != 0) { 1178 args->flags &= ~LINUX_MNT_FORCE; 1179 flags |= MNT_FORCE; 1180 } 1181 if (args->flags != 0) { 1182 linux_msg(td, "unsupported umount2 flags %#x", args->flags); 1183 return (EINVAL); 1184 } 1185 1186 return (kern_unmount(td, args->path, flags)); 1187 } 1188 #endif 1189 1190 /* 1191 * fcntl family of syscalls 1192 */ 1193 1194 struct l_flock { 1195 l_short l_type; 1196 l_short l_whence; 1197 l_off_t l_start; 1198 l_off_t l_len; 1199 l_pid_t l_pid; 1200 } 1201 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1202 __packed 1203 #endif 1204 ; 1205 1206 static void 1207 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock) 1208 { 1209 switch (linux_flock->l_type) { 1210 case LINUX_F_RDLCK: 1211 bsd_flock->l_type = F_RDLCK; 1212 break; 1213 case LINUX_F_WRLCK: 1214 bsd_flock->l_type = F_WRLCK; 1215 break; 1216 case LINUX_F_UNLCK: 1217 bsd_flock->l_type = F_UNLCK; 1218 break; 1219 default: 1220 bsd_flock->l_type = -1; 1221 break; 1222 } 1223 bsd_flock->l_whence = linux_flock->l_whence; 1224 bsd_flock->l_start = (off_t)linux_flock->l_start; 1225 bsd_flock->l_len = (off_t)linux_flock->l_len; 1226 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1227 bsd_flock->l_sysid = 0; 1228 } 1229 1230 static void 1231 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock) 1232 { 1233 switch (bsd_flock->l_type) { 1234 case F_RDLCK: 1235 linux_flock->l_type = LINUX_F_RDLCK; 1236 break; 1237 case F_WRLCK: 1238 linux_flock->l_type = LINUX_F_WRLCK; 1239 break; 1240 case F_UNLCK: 1241 linux_flock->l_type = LINUX_F_UNLCK; 1242 break; 1243 } 1244 linux_flock->l_whence = bsd_flock->l_whence; 1245 linux_flock->l_start = (l_off_t)bsd_flock->l_start; 1246 linux_flock->l_len = (l_off_t)bsd_flock->l_len; 1247 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1248 } 1249 1250 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1251 struct l_flock64 { 1252 l_short l_type; 1253 l_short l_whence; 1254 l_loff_t l_start; 1255 l_loff_t l_len; 1256 l_pid_t l_pid; 1257 } 1258 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1259 __packed 1260 #endif 1261 ; 1262 1263 static void 1264 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock) 1265 { 1266 switch (linux_flock->l_type) { 1267 case LINUX_F_RDLCK: 1268 bsd_flock->l_type = F_RDLCK; 1269 break; 1270 case LINUX_F_WRLCK: 1271 bsd_flock->l_type = F_WRLCK; 1272 break; 1273 case LINUX_F_UNLCK: 1274 bsd_flock->l_type = F_UNLCK; 1275 break; 1276 default: 1277 bsd_flock->l_type = -1; 1278 break; 1279 } 1280 bsd_flock->l_whence = linux_flock->l_whence; 1281 bsd_flock->l_start = (off_t)linux_flock->l_start; 1282 bsd_flock->l_len = (off_t)linux_flock->l_len; 1283 bsd_flock->l_pid = (pid_t)linux_flock->l_pid; 1284 bsd_flock->l_sysid = 0; 1285 } 1286 1287 static void 1288 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock) 1289 { 1290 switch (bsd_flock->l_type) { 1291 case F_RDLCK: 1292 linux_flock->l_type = LINUX_F_RDLCK; 1293 break; 1294 case F_WRLCK: 1295 linux_flock->l_type = LINUX_F_WRLCK; 1296 break; 1297 case F_UNLCK: 1298 linux_flock->l_type = LINUX_F_UNLCK; 1299 break; 1300 } 1301 linux_flock->l_whence = bsd_flock->l_whence; 1302 linux_flock->l_start = (l_loff_t)bsd_flock->l_start; 1303 linux_flock->l_len = (l_loff_t)bsd_flock->l_len; 1304 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid; 1305 } 1306 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1307 1308 static int 1309 fcntl_common(struct thread *td, struct linux_fcntl_args *args) 1310 { 1311 struct l_flock linux_flock; 1312 struct flock bsd_flock; 1313 struct pipe *fpipe; 1314 struct file *fp; 1315 long arg; 1316 int error, result; 1317 1318 switch (args->cmd) { 1319 case LINUX_F_DUPFD: 1320 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg)); 1321 1322 case LINUX_F_GETFD: 1323 return (kern_fcntl(td, args->fd, F_GETFD, 0)); 1324 1325 case LINUX_F_SETFD: 1326 return (kern_fcntl(td, args->fd, F_SETFD, args->arg)); 1327 1328 case LINUX_F_GETFL: 1329 error = kern_fcntl(td, args->fd, F_GETFL, 0); 1330 result = td->td_retval[0]; 1331 td->td_retval[0] = 0; 1332 if (result & O_RDONLY) 1333 td->td_retval[0] |= LINUX_O_RDONLY; 1334 if (result & O_WRONLY) 1335 td->td_retval[0] |= LINUX_O_WRONLY; 1336 if (result & O_RDWR) 1337 td->td_retval[0] |= LINUX_O_RDWR; 1338 if (result & O_NDELAY) 1339 td->td_retval[0] |= LINUX_O_NONBLOCK; 1340 if (result & O_APPEND) 1341 td->td_retval[0] |= LINUX_O_APPEND; 1342 if (result & O_FSYNC) 1343 td->td_retval[0] |= LINUX_O_SYNC; 1344 if (result & O_ASYNC) 1345 td->td_retval[0] |= LINUX_O_ASYNC; 1346 #ifdef LINUX_O_NOFOLLOW 1347 if (result & O_NOFOLLOW) 1348 td->td_retval[0] |= LINUX_O_NOFOLLOW; 1349 #endif 1350 #ifdef LINUX_O_DIRECT 1351 if (result & O_DIRECT) 1352 td->td_retval[0] |= LINUX_O_DIRECT; 1353 #endif 1354 return (error); 1355 1356 case LINUX_F_SETFL: 1357 arg = 0; 1358 if (args->arg & LINUX_O_NDELAY) 1359 arg |= O_NONBLOCK; 1360 if (args->arg & LINUX_O_APPEND) 1361 arg |= O_APPEND; 1362 if (args->arg & LINUX_O_SYNC) 1363 arg |= O_FSYNC; 1364 if (args->arg & LINUX_O_ASYNC) 1365 arg |= O_ASYNC; 1366 #ifdef LINUX_O_NOFOLLOW 1367 if (args->arg & LINUX_O_NOFOLLOW) 1368 arg |= O_NOFOLLOW; 1369 #endif 1370 #ifdef LINUX_O_DIRECT 1371 if (args->arg & LINUX_O_DIRECT) 1372 arg |= O_DIRECT; 1373 #endif 1374 return (kern_fcntl(td, args->fd, F_SETFL, arg)); 1375 1376 case LINUX_F_GETLK: 1377 error = copyin((void *)args->arg, &linux_flock, 1378 sizeof(linux_flock)); 1379 if (error) 1380 return (error); 1381 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1382 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1383 if (error) 1384 return (error); 1385 bsd_to_linux_flock(&bsd_flock, &linux_flock); 1386 return (copyout(&linux_flock, (void *)args->arg, 1387 sizeof(linux_flock))); 1388 1389 case LINUX_F_SETLK: 1390 error = copyin((void *)args->arg, &linux_flock, 1391 sizeof(linux_flock)); 1392 if (error) 1393 return (error); 1394 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1395 return (kern_fcntl(td, args->fd, F_SETLK, 1396 (intptr_t)&bsd_flock)); 1397 1398 case LINUX_F_SETLKW: 1399 error = copyin((void *)args->arg, &linux_flock, 1400 sizeof(linux_flock)); 1401 if (error) 1402 return (error); 1403 linux_to_bsd_flock(&linux_flock, &bsd_flock); 1404 return (kern_fcntl(td, args->fd, F_SETLKW, 1405 (intptr_t)&bsd_flock)); 1406 1407 case LINUX_F_GETOWN: 1408 return (kern_fcntl(td, args->fd, F_GETOWN, 0)); 1409 1410 case LINUX_F_SETOWN: 1411 /* 1412 * XXX some Linux applications depend on F_SETOWN having no 1413 * significant effect for pipes (SIGIO is not delivered for 1414 * pipes under Linux-2.2.35 at least). 1415 */ 1416 error = fget(td, args->fd, 1417 &cap_fcntl_rights, &fp); 1418 if (error) 1419 return (error); 1420 if (fp->f_type == DTYPE_PIPE) { 1421 fdrop(fp, td); 1422 return (EINVAL); 1423 } 1424 fdrop(fp, td); 1425 1426 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg)); 1427 1428 case LINUX_F_DUPFD_CLOEXEC: 1429 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg)); 1430 /* 1431 * Our F_SEAL_* values match Linux one for maximum compatibility. So we 1432 * only needed to account for different values for fcntl(2) commands. 1433 */ 1434 case LINUX_F_GET_SEALS: 1435 error = kern_fcntl(td, args->fd, F_GET_SEALS, 0); 1436 if (error != 0) 1437 return (error); 1438 td->td_retval[0] = bsd_to_linux_bits(td->td_retval[0], 1439 seal_bitmap, 0); 1440 return (0); 1441 1442 case LINUX_F_ADD_SEALS: 1443 return (kern_fcntl(td, args->fd, F_ADD_SEALS, 1444 linux_to_bsd_bits(args->arg, seal_bitmap, 0))); 1445 1446 case LINUX_F_GETPIPE_SZ: 1447 error = fget(td, args->fd, 1448 &cap_fcntl_rights, &fp); 1449 if (error != 0) 1450 return (error); 1451 if (fp->f_type != DTYPE_PIPE) { 1452 fdrop(fp, td); 1453 return (EINVAL); 1454 } 1455 fpipe = fp->f_data; 1456 td->td_retval[0] = fpipe->pipe_buffer.size; 1457 fdrop(fp, td); 1458 return (0); 1459 1460 default: 1461 linux_msg(td, "unsupported fcntl cmd %d", args->cmd); 1462 return (EINVAL); 1463 } 1464 } 1465 1466 int 1467 linux_fcntl(struct thread *td, struct linux_fcntl_args *args) 1468 { 1469 1470 return (fcntl_common(td, args)); 1471 } 1472 1473 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1474 int 1475 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args) 1476 { 1477 struct l_flock64 linux_flock; 1478 struct flock bsd_flock; 1479 struct linux_fcntl_args fcntl_args; 1480 int error; 1481 1482 switch (args->cmd) { 1483 case LINUX_F_GETLK64: 1484 error = copyin((void *)args->arg, &linux_flock, 1485 sizeof(linux_flock)); 1486 if (error) 1487 return (error); 1488 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1489 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock); 1490 if (error) 1491 return (error); 1492 bsd_to_linux_flock64(&bsd_flock, &linux_flock); 1493 return (copyout(&linux_flock, (void *)args->arg, 1494 sizeof(linux_flock))); 1495 1496 case LINUX_F_SETLK64: 1497 error = copyin((void *)args->arg, &linux_flock, 1498 sizeof(linux_flock)); 1499 if (error) 1500 return (error); 1501 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1502 return (kern_fcntl(td, args->fd, F_SETLK, 1503 (intptr_t)&bsd_flock)); 1504 1505 case LINUX_F_SETLKW64: 1506 error = copyin((void *)args->arg, &linux_flock, 1507 sizeof(linux_flock)); 1508 if (error) 1509 return (error); 1510 linux_to_bsd_flock64(&linux_flock, &bsd_flock); 1511 return (kern_fcntl(td, args->fd, F_SETLKW, 1512 (intptr_t)&bsd_flock)); 1513 } 1514 1515 fcntl_args.fd = args->fd; 1516 fcntl_args.cmd = args->cmd; 1517 fcntl_args.arg = args->arg; 1518 return (fcntl_common(td, &fcntl_args)); 1519 } 1520 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1521 1522 #ifdef LINUX_LEGACY_SYSCALLS 1523 int 1524 linux_chown(struct thread *td, struct linux_chown_args *args) 1525 { 1526 1527 return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE, 1528 args->uid, args->gid, 0)); 1529 } 1530 #endif 1531 1532 int 1533 linux_fchownat(struct thread *td, struct linux_fchownat_args *args) 1534 { 1535 int dfd, flag, unsupported; 1536 1537 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 1538 if (unsupported != 0) { 1539 linux_msg(td, "fchownat unsupported flag 0x%x", unsupported); 1540 return (EINVAL); 1541 } 1542 1543 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 : 1544 AT_SYMLINK_NOFOLLOW; 1545 flag |= (args->flag & LINUX_AT_EMPTY_PATH) == 0 ? 0 : 1546 AT_EMPTY_PATH; 1547 1548 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 1549 return (kern_fchownat(td, dfd, args->filename, UIO_USERSPACE, 1550 args->uid, args->gid, flag)); 1551 } 1552 1553 #ifdef LINUX_LEGACY_SYSCALLS 1554 int 1555 linux_lchown(struct thread *td, struct linux_lchown_args *args) 1556 { 1557 1558 return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->uid, 1559 args->gid, AT_SYMLINK_NOFOLLOW)); 1560 } 1561 #endif 1562 1563 static int 1564 convert_fadvice(int advice) 1565 { 1566 switch (advice) { 1567 case LINUX_POSIX_FADV_NORMAL: 1568 return (POSIX_FADV_NORMAL); 1569 case LINUX_POSIX_FADV_RANDOM: 1570 return (POSIX_FADV_RANDOM); 1571 case LINUX_POSIX_FADV_SEQUENTIAL: 1572 return (POSIX_FADV_SEQUENTIAL); 1573 case LINUX_POSIX_FADV_WILLNEED: 1574 return (POSIX_FADV_WILLNEED); 1575 case LINUX_POSIX_FADV_DONTNEED: 1576 return (POSIX_FADV_DONTNEED); 1577 case LINUX_POSIX_FADV_NOREUSE: 1578 return (POSIX_FADV_NOREUSE); 1579 default: 1580 return (-1); 1581 } 1582 } 1583 1584 int 1585 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args) 1586 { 1587 off_t offset; 1588 int advice; 1589 1590 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1591 offset = PAIR32TO64(off_t, args->offset); 1592 #else 1593 offset = args->offset; 1594 #endif 1595 1596 advice = convert_fadvice(args->advice); 1597 if (advice == -1) 1598 return (EINVAL); 1599 return (kern_posix_fadvise(td, args->fd, offset, args->len, advice)); 1600 } 1601 1602 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1603 int 1604 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args) 1605 { 1606 off_t len, offset; 1607 int advice; 1608 1609 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1610 len = PAIR32TO64(off_t, args->len); 1611 offset = PAIR32TO64(off_t, args->offset); 1612 #else 1613 len = args->len; 1614 offset = args->offset; 1615 #endif 1616 1617 advice = convert_fadvice(args->advice); 1618 if (advice == -1) 1619 return (EINVAL); 1620 return (kern_posix_fadvise(td, args->fd, offset, len, advice)); 1621 } 1622 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1623 1624 #ifdef LINUX_LEGACY_SYSCALLS 1625 int 1626 linux_pipe(struct thread *td, struct linux_pipe_args *args) 1627 { 1628 int fildes[2]; 1629 int error; 1630 1631 error = kern_pipe(td, fildes, 0, NULL, NULL); 1632 if (error != 0) 1633 return (error); 1634 1635 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1636 if (error != 0) { 1637 (void)kern_close(td, fildes[0]); 1638 (void)kern_close(td, fildes[1]); 1639 } 1640 1641 return (error); 1642 } 1643 #endif 1644 1645 int 1646 linux_pipe2(struct thread *td, struct linux_pipe2_args *args) 1647 { 1648 int fildes[2]; 1649 int error, flags; 1650 1651 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0) 1652 return (EINVAL); 1653 1654 flags = 0; 1655 if ((args->flags & LINUX_O_NONBLOCK) != 0) 1656 flags |= O_NONBLOCK; 1657 if ((args->flags & LINUX_O_CLOEXEC) != 0) 1658 flags |= O_CLOEXEC; 1659 error = kern_pipe(td, fildes, flags, NULL, NULL); 1660 if (error != 0) 1661 return (error); 1662 1663 error = copyout(fildes, args->pipefds, sizeof(fildes)); 1664 if (error != 0) { 1665 (void)kern_close(td, fildes[0]); 1666 (void)kern_close(td, fildes[1]); 1667 } 1668 1669 return (error); 1670 } 1671 1672 int 1673 linux_dup3(struct thread *td, struct linux_dup3_args *args) 1674 { 1675 int cmd; 1676 intptr_t newfd; 1677 1678 if (args->oldfd == args->newfd) 1679 return (EINVAL); 1680 if ((args->flags & ~LINUX_O_CLOEXEC) != 0) 1681 return (EINVAL); 1682 if (args->flags & LINUX_O_CLOEXEC) 1683 cmd = F_DUP2FD_CLOEXEC; 1684 else 1685 cmd = F_DUP2FD; 1686 1687 newfd = args->newfd; 1688 return (kern_fcntl(td, args->oldfd, cmd, newfd)); 1689 } 1690 1691 int 1692 linux_fallocate(struct thread *td, struct linux_fallocate_args *args) 1693 { 1694 off_t len, offset; 1695 1696 /* 1697 * We emulate only posix_fallocate system call for which 1698 * mode should be 0. 1699 */ 1700 if (args->mode != 0) 1701 return (EOPNOTSUPP); 1702 1703 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1704 len = PAIR32TO64(off_t, args->len); 1705 offset = PAIR32TO64(off_t, args->offset); 1706 #else 1707 len = args->len; 1708 offset = args->offset; 1709 #endif 1710 1711 return (kern_posix_fallocate(td, args->fd, offset, len)); 1712 } 1713 1714 int 1715 linux_copy_file_range(struct thread *td, struct linux_copy_file_range_args 1716 *args) 1717 { 1718 l_loff_t inoff, outoff, *inoffp, *outoffp; 1719 int error, flags; 1720 1721 /* 1722 * copy_file_range(2) on Linux doesn't define any flags (yet), so is 1723 * the native implementation. Enforce it. 1724 */ 1725 if (args->flags != 0) { 1726 linux_msg(td, "copy_file_range unsupported flags 0x%x", 1727 args->flags); 1728 return (EINVAL); 1729 } 1730 flags = 0; 1731 inoffp = outoffp = NULL; 1732 if (args->off_in != NULL) { 1733 error = copyin(args->off_in, &inoff, sizeof(l_loff_t)); 1734 if (error != 0) 1735 return (error); 1736 inoffp = &inoff; 1737 } 1738 if (args->off_out != NULL) { 1739 error = copyin(args->off_out, &outoff, sizeof(l_loff_t)); 1740 if (error != 0) 1741 return (error); 1742 outoffp = &outoff; 1743 } 1744 1745 error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out, 1746 outoffp, args->len, flags); 1747 if (error == 0 && args->off_in != NULL) 1748 error = copyout(inoffp, args->off_in, sizeof(l_loff_t)); 1749 if (error == 0 && args->off_out != NULL) 1750 error = copyout(outoffp, args->off_out, sizeof(l_loff_t)); 1751 return (error); 1752 } 1753 1754 #define LINUX_MEMFD_PREFIX "memfd:" 1755 1756 int 1757 linux_memfd_create(struct thread *td, struct linux_memfd_create_args *args) 1758 { 1759 char memfd_name[LINUX_NAME_MAX + 1]; 1760 int error, flags, shmflags, oflags; 1761 1762 /* 1763 * This is our clever trick to avoid the heap allocation to copy in the 1764 * uname. We don't really need to go this far out of our way, but it 1765 * does keep the rest of this function fairly clean as they don't have 1766 * to worry about cleanup on the way out. 1767 */ 1768 error = copyinstr(args->uname_ptr, 1769 memfd_name + sizeof(LINUX_MEMFD_PREFIX) - 1, 1770 LINUX_NAME_MAX - sizeof(LINUX_MEMFD_PREFIX) - 1, NULL); 1771 if (error != 0) { 1772 if (error == ENAMETOOLONG) 1773 error = EINVAL; 1774 return (error); 1775 } 1776 1777 memcpy(memfd_name, LINUX_MEMFD_PREFIX, sizeof(LINUX_MEMFD_PREFIX) - 1); 1778 flags = linux_to_bsd_bits(args->flags, mfd_bitmap, 0); 1779 if ((flags & ~(MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_HUGETLB | 1780 MFD_HUGE_MASK)) != 0) 1781 return (EINVAL); 1782 /* Size specified but no HUGETLB. */ 1783 if ((flags & MFD_HUGE_MASK) != 0 && (flags & MFD_HUGETLB) == 0) 1784 return (EINVAL); 1785 /* We don't actually support HUGETLB. */ 1786 if ((flags & MFD_HUGETLB) != 0) 1787 return (ENOSYS); 1788 oflags = O_RDWR; 1789 shmflags = SHM_GROW_ON_WRITE; 1790 if ((flags & MFD_CLOEXEC) != 0) 1791 oflags |= O_CLOEXEC; 1792 if ((flags & MFD_ALLOW_SEALING) != 0) 1793 shmflags |= SHM_ALLOW_SEALING; 1794 return (kern_shm_open2(td, SHM_ANON, oflags, 0, shmflags, NULL, 1795 memfd_name, NULL)); 1796 } 1797 1798 int 1799 linux_splice(struct thread *td, struct linux_splice_args *args) 1800 { 1801 1802 linux_msg(td, "syscall splice not really implemented"); 1803 1804 /* 1805 * splice(2) is documented to return EINVAL in various circumstances; 1806 * returning it instead of ENOSYS should hint the caller to use fallback 1807 * instead. 1808 */ 1809 return (EINVAL); 1810 } 1811 1812 int 1813 linux_close_range(struct thread *td, struct linux_close_range_args *args) 1814 { 1815 u_int flags = 0; 1816 1817 /* 1818 * Implementing close_range(CLOSE_RANGE_UNSHARE) allows Linux to 1819 * unshare filedesc table of the calling thread from others threads 1820 * in a thread group (i.e., process in the FreeBSD) or others processes, 1821 * which shares the same table, before closing the files. FreeBSD does 1822 * not have compatible unsharing mechanism due to the fact that sharing 1823 * process resources, including filedesc table, is at thread level in the 1824 * Linux, while in the FreeBSD it is at the process level. 1825 * Return EINVAL for now if the CLOSE_RANGE_UNSHARE flag is specified 1826 * until this new Linux API stabilizes. 1827 */ 1828 1829 if ((args->flags & ~(LINUX_CLOSE_RANGE_CLOEXEC)) != 0) 1830 return (EINVAL); 1831 if (args->first > args->last) 1832 return (EINVAL); 1833 if ((args->flags & LINUX_CLOSE_RANGE_CLOEXEC) != 0) 1834 flags |= CLOSE_RANGE_CLOEXEC; 1835 return (kern_close_range(td, flags, args->first, args->last)); 1836 } 1837 1838 int 1839 linux_enobufs2eagain(struct thread *td, int fd, int error) 1840 { 1841 struct file *fp; 1842 1843 if (error != ENOBUFS) 1844 return (error); 1845 if (fget(td, fd, &cap_no_rights, &fp) != 0) 1846 return (error); 1847 if (fp->f_type == DTYPE_SOCKET && (fp->f_flag & FNONBLOCK) != 0) 1848 error = EAGAIN; 1849 fdrop(fp, td); 1850 return (error); 1851 } 1852 1853 int 1854 linux_write(struct thread *td, struct linux_write_args *args) 1855 { 1856 struct write_args bargs = { 1857 .fd = args->fd, 1858 .buf = args->buf, 1859 .nbyte = args->nbyte, 1860 }; 1861 1862 return (linux_enobufs2eagain(td, args->fd, sys_write(td, &bargs))); 1863 } 1864 1865 int 1866 linux_writev(struct thread *td, struct linux_writev_args *args) 1867 { 1868 struct uio *auio; 1869 int error; 1870 1871 #ifdef COMPAT_LINUX32 1872 error = freebsd32_copyinuio(PTRIN(args->iovp), args->iovcnt, &auio); 1873 #else 1874 error = copyinuio(args->iovp, args->iovcnt, &auio); 1875 #endif 1876 if (error != 0) 1877 return (error); 1878 error = kern_writev(td, args->fd, auio); 1879 freeuio(auio); 1880 return (linux_enobufs2eagain(td, args->fd, error)); 1881 } 1882 1883 static int 1884 linux_inotify_init_flags(int l_flags) 1885 { 1886 int bsd_flags; 1887 1888 if ((l_flags & ~(LINUX_IN_CLOEXEC | LINUX_IN_NONBLOCK)) != 0) 1889 linux_msg(NULL, "inotify_init1 unsupported flags 0x%x", 1890 l_flags); 1891 1892 bsd_flags = 0; 1893 if ((l_flags & LINUX_IN_CLOEXEC) != 0) 1894 bsd_flags |= O_CLOEXEC; 1895 if ((l_flags & LINUX_IN_NONBLOCK) != 0) 1896 bsd_flags |= O_NONBLOCK; 1897 return (bsd_flags); 1898 } 1899 1900 static int 1901 inotify_init_common(struct thread *td, int flags) 1902 { 1903 struct specialfd_inotify si; 1904 1905 si.flags = linux_inotify_init_flags(flags); 1906 return (kern_specialfd(td, SPECIALFD_INOTIFY, &si)); 1907 } 1908 1909 #if defined(__i386__) || defined(__amd64__) 1910 int 1911 linux_inotify_init(struct thread *td, struct linux_inotify_init_args *args) 1912 { 1913 return (inotify_init_common(td, 0)); 1914 } 1915 #endif 1916 1917 int 1918 linux_inotify_init1(struct thread *td, struct linux_inotify_init1_args *args) 1919 { 1920 return (inotify_init_common(td, args->flags)); 1921 } 1922 1923 /* 1924 * The native implementation uses the same values for inotify events as 1925 * libinotify, which gives us binary compatibility with Linux. This simplifies 1926 * the shim implementation a lot, as otherwise we would have to handle read(2) 1927 * calls on inotify descriptors and translate events to Linux's ABI. 1928 */ 1929 _Static_assert(LINUX_IN_ACCESS == IN_ACCESS, 1930 "IN_ACCESS mismatch"); 1931 _Static_assert(LINUX_IN_MODIFY == IN_MODIFY, 1932 "IN_MODIFY mismatch"); 1933 _Static_assert(LINUX_IN_ATTRIB == IN_ATTRIB, 1934 "IN_ATTRIB mismatch"); 1935 _Static_assert(LINUX_IN_CLOSE_WRITE == IN_CLOSE_WRITE, 1936 "IN_CLOSE_WRITE mismatch"); 1937 _Static_assert(LINUX_IN_CLOSE_NOWRITE == IN_CLOSE_NOWRITE, 1938 "IN_CLOSE_NOWRITE mismatch"); 1939 _Static_assert(LINUX_IN_OPEN == IN_OPEN, 1940 "IN_OPEN mismatch"); 1941 _Static_assert(LINUX_IN_MOVED_FROM == IN_MOVED_FROM, 1942 "IN_MOVED_FROM mismatch"); 1943 _Static_assert(LINUX_IN_MOVED_TO == IN_MOVED_TO, 1944 "IN_MOVED_TO mismatch"); 1945 _Static_assert(LINUX_IN_CREATE == IN_CREATE, 1946 "IN_CREATE mismatch"); 1947 _Static_assert(LINUX_IN_DELETE == IN_DELETE, 1948 "IN_DELETE mismatch"); 1949 _Static_assert(LINUX_IN_DELETE_SELF == IN_DELETE_SELF, 1950 "IN_DELETE_SELF mismatch"); 1951 _Static_assert(LINUX_IN_MOVE_SELF == IN_MOVE_SELF, 1952 "IN_MOVE_SELF mismatch"); 1953 1954 _Static_assert(LINUX_IN_UNMOUNT == IN_UNMOUNT, 1955 "IN_UNMOUNT mismatch"); 1956 _Static_assert(LINUX_IN_Q_OVERFLOW == IN_Q_OVERFLOW, 1957 "IN_Q_OVERFLOW mismatch"); 1958 _Static_assert(LINUX_IN_IGNORED == IN_IGNORED, 1959 "IN_IGNORED mismatch"); 1960 1961 _Static_assert(LINUX_IN_ISDIR == IN_ISDIR, 1962 "IN_ISDIR mismatch"); 1963 _Static_assert(LINUX_IN_ONLYDIR == IN_ONLYDIR, 1964 "IN_ONLYDIR mismatch"); 1965 _Static_assert(LINUX_IN_DONT_FOLLOW == IN_DONT_FOLLOW, 1966 "IN_DONT_FOLLOW mismatch"); 1967 _Static_assert(LINUX_IN_MASK_CREATE == IN_MASK_CREATE, 1968 "IN_MASK_CREATE mismatch"); 1969 _Static_assert(LINUX_IN_MASK_ADD == IN_MASK_ADD, 1970 "IN_MASK_ADD mismatch"); 1971 _Static_assert(LINUX_IN_ONESHOT == IN_ONESHOT, 1972 "IN_ONESHOT mismatch"); 1973 _Static_assert(LINUX_IN_EXCL_UNLINK == IN_EXCL_UNLINK, 1974 "IN_EXCL_UNLINK mismatch"); 1975 1976 static int 1977 linux_inotify_watch_flags(int l_flags) 1978 { 1979 if ((l_flags & ~(LINUX_IN_ALL_EVENTS | LINUX_IN_ALL_FLAGS)) != 0) { 1980 linux_msg(NULL, "inotify_add_watch unsupported flags 0x%x", 1981 l_flags); 1982 } 1983 1984 return (l_flags); 1985 } 1986 1987 int 1988 linux_inotify_add_watch(struct thread *td, 1989 struct linux_inotify_add_watch_args *args) 1990 { 1991 return (kern_inotify_add_watch(args->fd, AT_FDCWD, args->pathname, 1992 linux_inotify_watch_flags(args->mask), td)); 1993 } 1994 1995 int 1996 linux_inotify_rm_watch(struct thread *td, 1997 struct linux_inotify_rm_watch_args *args) 1998 { 1999 return (kern_inotify_rm_watch(args->fd, args->wd, td)); 2000 } 2001