1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1994-1995 Søren Schmidt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_compat.h" 33 34 #include <sys/param.h> 35 #include <sys/capsicum.h> 36 #include <sys/dirent.h> 37 #include <sys/file.h> 38 #include <sys/filedesc.h> 39 #include <sys/proc.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/stat.h> 44 #include <sys/syscallsubr.h> 45 #include <sys/systm.h> 46 #include <sys/tty.h> 47 #include <sys/vnode.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 51 #ifdef COMPAT_LINUX32 52 #include <machine/../linux32/linux.h> 53 #include <machine/../linux32/linux32_proto.h> 54 #else 55 #include <machine/../linux/linux.h> 56 #include <machine/../linux/linux_proto.h> 57 #endif 58 59 #include <compat/linux/linux_util.h> 60 #include <compat/linux/linux_file.h> 61 62 63 static void 64 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 65 { 66 int major, minor; 67 68 if (vp->v_type == VCHR && vp->v_rdev != NULL && 69 linux_driver_get_major_minor(devtoname(vp->v_rdev), 70 &major, &minor) == 0) { 71 sb->st_rdev = (major << 8 | minor); 72 } 73 } 74 75 static int 76 linux_kern_statat(struct thread *td, int flag, int fd, char *path, 77 enum uio_seg pathseg, struct stat *sbp) 78 { 79 80 return (kern_statat(td, flag, fd, path, pathseg, sbp, 81 translate_vnhook_major_minor)); 82 } 83 84 static int 85 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, 86 struct stat *sbp) 87 { 88 89 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 90 } 91 92 static int 93 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, 94 struct stat *sbp) 95 { 96 97 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 98 pathseg, sbp)); 99 } 100 101 static void 102 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 103 { 104 struct file *fp; 105 struct vnode *vp; 106 int major, minor; 107 108 /* 109 * No capability rights required here. 110 */ 111 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 112 fget(td, fd, &cap_no_rights, &fp) != 0) 113 return; 114 vp = fp->f_vnode; 115 if (vp != NULL && vp->v_rdev != NULL && 116 linux_driver_get_major_minor(devtoname(vp->v_rdev), 117 &major, &minor) == 0) { 118 buf->st_rdev = (major << 8 | minor); 119 } else if (fp->f_type == DTYPE_PTS) { 120 struct tty *tp = fp->f_data; 121 122 /* Convert the numbers for the slave device. */ 123 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 124 &major, &minor) == 0) { 125 buf->st_rdev = (major << 8 | minor); 126 } 127 } 128 fdrop(fp, td); 129 } 130 131 static int 132 newstat_copyout(struct stat *buf, void *ubuf) 133 { 134 struct l_newstat tbuf; 135 136 bzero(&tbuf, sizeof(tbuf)); 137 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 138 tbuf.st_ino = buf->st_ino; 139 tbuf.st_mode = buf->st_mode; 140 tbuf.st_nlink = buf->st_nlink; 141 tbuf.st_uid = buf->st_uid; 142 tbuf.st_gid = buf->st_gid; 143 tbuf.st_rdev = buf->st_rdev; 144 tbuf.st_size = buf->st_size; 145 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 146 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 147 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 148 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 149 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 150 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 151 tbuf.st_blksize = buf->st_blksize; 152 tbuf.st_blocks = buf->st_blocks; 153 154 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 155 } 156 157 int 158 linux_newstat(struct thread *td, struct linux_newstat_args *args) 159 { 160 struct stat buf; 161 char *path; 162 int error; 163 164 LCONVPATHEXIST(td, args->path, &path); 165 166 #ifdef DEBUG 167 if (ldebug(newstat)) 168 printf(ARGS(newstat, "%s, *"), path); 169 #endif 170 171 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 172 LFREEPATH(path); 173 if (error) 174 return (error); 175 return (newstat_copyout(&buf, args->buf)); 176 } 177 178 int 179 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 180 { 181 struct stat sb; 182 char *path; 183 int error; 184 185 LCONVPATHEXIST(td, args->path, &path); 186 187 #ifdef DEBUG 188 if (ldebug(newlstat)) 189 printf(ARGS(newlstat, "%s, *"), path); 190 #endif 191 192 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 193 LFREEPATH(path); 194 if (error) 195 return (error); 196 return (newstat_copyout(&sb, args->buf)); 197 } 198 199 int 200 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 201 { 202 struct stat buf; 203 int error; 204 205 #ifdef DEBUG 206 if (ldebug(newfstat)) 207 printf(ARGS(newfstat, "%d, *"), args->fd); 208 #endif 209 210 error = kern_fstat(td, args->fd, &buf); 211 translate_fd_major_minor(td, args->fd, &buf); 212 if (!error) 213 error = newstat_copyout(&buf, args->buf); 214 215 return (error); 216 } 217 218 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 219 static int 220 stat_copyout(struct stat *buf, void *ubuf) 221 { 222 struct l_stat lbuf; 223 224 bzero(&lbuf, sizeof(lbuf)); 225 lbuf.st_dev = buf->st_dev; 226 lbuf.st_ino = buf->st_ino; 227 lbuf.st_mode = buf->st_mode; 228 lbuf.st_nlink = buf->st_nlink; 229 lbuf.st_uid = buf->st_uid; 230 lbuf.st_gid = buf->st_gid; 231 lbuf.st_rdev = buf->st_rdev; 232 if (buf->st_size < (quad_t)1 << 32) 233 lbuf.st_size = buf->st_size; 234 else 235 lbuf.st_size = -2; 236 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 237 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 238 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 239 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 240 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 241 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 242 lbuf.st_blksize = buf->st_blksize; 243 lbuf.st_blocks = buf->st_blocks; 244 lbuf.st_flags = buf->st_flags; 245 lbuf.st_gen = buf->st_gen; 246 247 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 248 } 249 250 int 251 linux_stat(struct thread *td, struct linux_stat_args *args) 252 { 253 struct stat buf; 254 char *path; 255 int error; 256 257 LCONVPATHEXIST(td, args->path, &path); 258 259 #ifdef DEBUG 260 if (ldebug(stat)) 261 printf(ARGS(stat, "%s, *"), path); 262 #endif 263 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 264 if (error) { 265 LFREEPATH(path); 266 return (error); 267 } 268 LFREEPATH(path); 269 return (stat_copyout(&buf, args->up)); 270 } 271 272 int 273 linux_lstat(struct thread *td, struct linux_lstat_args *args) 274 { 275 struct stat buf; 276 char *path; 277 int error; 278 279 LCONVPATHEXIST(td, args->path, &path); 280 281 #ifdef DEBUG 282 if (ldebug(lstat)) 283 printf(ARGS(lstat, "%s, *"), path); 284 #endif 285 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 286 if (error) { 287 LFREEPATH(path); 288 return (error); 289 } 290 LFREEPATH(path); 291 return (stat_copyout(&buf, args->up)); 292 } 293 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 294 295 struct l_statfs { 296 l_long f_type; 297 l_long f_bsize; 298 l_long f_blocks; 299 l_long f_bfree; 300 l_long f_bavail; 301 l_long f_files; 302 l_long f_ffree; 303 l_fsid_t f_fsid; 304 l_long f_namelen; 305 l_long f_frsize; 306 l_long f_flags; 307 l_long f_spare[4]; 308 }; 309 310 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 311 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 312 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 313 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 314 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 315 #define LINUX_NCP_SUPER_MAGIC 0x564cL 316 #define LINUX_NFS_SUPER_MAGIC 0x6969L 317 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 318 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 319 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 320 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 321 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 322 #define LINUX_SHMFS_MAGIC 0x01021994 323 324 static long 325 bsd_to_linux_ftype(const char *fstypename) 326 { 327 int i; 328 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 329 {"ufs", LINUX_UFS_SUPER_MAGIC}, 330 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 331 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 332 {"nfs", LINUX_NFS_SUPER_MAGIC}, 333 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 334 {"procfs", LINUX_PROC_SUPER_MAGIC}, 335 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 336 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 337 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 338 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 339 {"coda", LINUX_CODA_SUPER_MAGIC}, 340 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 341 {"tmpfs", LINUX_SHMFS_MAGIC}, 342 {NULL, 0L}}; 343 344 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 345 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 346 return (b2l_tbl[i].linux_type); 347 348 return (0L); 349 } 350 351 static int 352 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 353 { 354 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 355 uint64_t tmp; 356 357 #define LINUX_HIBITS 0xffffffff00000000ULL 358 359 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 360 bsd_statfs->f_bsize; 361 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 362 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 363 (tmp & LINUX_HIBITS)) 364 return (EOVERFLOW); 365 #undef LINUX_HIBITS 366 #endif 367 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 368 linux_statfs->f_bsize = bsd_statfs->f_bsize; 369 linux_statfs->f_blocks = bsd_statfs->f_blocks; 370 linux_statfs->f_bfree = bsd_statfs->f_bfree; 371 linux_statfs->f_bavail = bsd_statfs->f_bavail; 372 linux_statfs->f_ffree = bsd_statfs->f_ffree; 373 linux_statfs->f_files = bsd_statfs->f_files; 374 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 375 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 376 linux_statfs->f_namelen = MAXNAMLEN; 377 linux_statfs->f_frsize = bsd_statfs->f_bsize; 378 linux_statfs->f_flags = 0; 379 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 380 381 return (0); 382 } 383 384 int 385 linux_statfs(struct thread *td, struct linux_statfs_args *args) 386 { 387 struct l_statfs linux_statfs; 388 struct statfs *bsd_statfs; 389 char *path; 390 int error; 391 392 LCONVPATHEXIST(td, args->path, &path); 393 394 #ifdef DEBUG 395 if (ldebug(statfs)) 396 printf(ARGS(statfs, "%s, *"), path); 397 #endif 398 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 399 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 400 LFREEPATH(path); 401 if (error == 0) 402 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 403 free(bsd_statfs, M_STATFS); 404 if (error != 0) 405 return (error); 406 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 407 } 408 409 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 410 static void 411 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 412 { 413 414 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 415 linux_statfs->f_bsize = bsd_statfs->f_bsize; 416 linux_statfs->f_blocks = bsd_statfs->f_blocks; 417 linux_statfs->f_bfree = bsd_statfs->f_bfree; 418 linux_statfs->f_bavail = bsd_statfs->f_bavail; 419 linux_statfs->f_ffree = bsd_statfs->f_ffree; 420 linux_statfs->f_files = bsd_statfs->f_files; 421 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 422 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 423 linux_statfs->f_namelen = MAXNAMLEN; 424 linux_statfs->f_frsize = bsd_statfs->f_bsize; 425 linux_statfs->f_flags = 0; 426 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 427 } 428 429 int 430 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 431 { 432 struct l_statfs64 linux_statfs; 433 struct statfs *bsd_statfs; 434 char *path; 435 int error; 436 437 if (args->bufsize != sizeof(struct l_statfs64)) 438 return (EINVAL); 439 440 LCONVPATHEXIST(td, args->path, &path); 441 442 #ifdef DEBUG 443 if (ldebug(statfs64)) 444 printf(ARGS(statfs64, "%s, *"), path); 445 #endif 446 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 447 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 448 LFREEPATH(path); 449 if (error == 0) 450 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 451 free(bsd_statfs, M_STATFS); 452 if (error != 0) 453 return (error); 454 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 455 } 456 457 int 458 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 459 { 460 struct l_statfs64 linux_statfs; 461 struct statfs *bsd_statfs; 462 int error; 463 464 #ifdef DEBUG 465 if (ldebug(fstatfs64)) 466 printf(ARGS(fstatfs64, "%d, *"), args->fd); 467 #endif 468 if (args->bufsize != sizeof(struct l_statfs64)) 469 return (EINVAL); 470 471 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 472 error = kern_fstatfs(td, args->fd, bsd_statfs); 473 if (error == 0) 474 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 475 free(bsd_statfs, M_STATFS); 476 if (error != 0) 477 return (error); 478 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 479 } 480 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 481 482 int 483 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 484 { 485 struct l_statfs linux_statfs; 486 struct statfs *bsd_statfs; 487 int error; 488 489 #ifdef DEBUG 490 if (ldebug(fstatfs)) 491 printf(ARGS(fstatfs, "%d, *"), args->fd); 492 #endif 493 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 494 error = kern_fstatfs(td, args->fd, bsd_statfs); 495 if (error == 0) 496 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 497 free(bsd_statfs, M_STATFS); 498 if (error != 0) 499 return (error); 500 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 501 } 502 503 struct l_ustat 504 { 505 l_daddr_t f_tfree; 506 l_ino_t f_tinode; 507 char f_fname[6]; 508 char f_fpack[6]; 509 }; 510 511 int 512 linux_ustat(struct thread *td, struct linux_ustat_args *args) 513 { 514 #ifdef DEBUG 515 if (ldebug(ustat)) 516 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 517 #endif 518 519 return (EOPNOTSUPP); 520 } 521 522 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 523 524 static int 525 stat64_copyout(struct stat *buf, void *ubuf) 526 { 527 struct l_stat64 lbuf; 528 529 bzero(&lbuf, sizeof(lbuf)); 530 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 531 lbuf.st_ino = buf->st_ino; 532 lbuf.st_mode = buf->st_mode; 533 lbuf.st_nlink = buf->st_nlink; 534 lbuf.st_uid = buf->st_uid; 535 lbuf.st_gid = buf->st_gid; 536 lbuf.st_rdev = buf->st_rdev; 537 lbuf.st_size = buf->st_size; 538 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 539 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 540 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 541 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 542 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 543 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 544 lbuf.st_blksize = buf->st_blksize; 545 lbuf.st_blocks = buf->st_blocks; 546 547 /* 548 * The __st_ino field makes all the difference. In the Linux kernel 549 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 550 * but without the assignment to __st_ino the runtime linker refuses 551 * to mmap(2) any shared libraries. I guess it's broken alright :-) 552 */ 553 lbuf.__st_ino = buf->st_ino; 554 555 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 556 } 557 558 int 559 linux_stat64(struct thread *td, struct linux_stat64_args *args) 560 { 561 struct stat buf; 562 char *filename; 563 int error; 564 565 LCONVPATHEXIST(td, args->filename, &filename); 566 567 #ifdef DEBUG 568 if (ldebug(stat64)) 569 printf(ARGS(stat64, "%s, *"), filename); 570 #endif 571 572 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 573 LFREEPATH(filename); 574 if (error) 575 return (error); 576 return (stat64_copyout(&buf, args->statbuf)); 577 } 578 579 int 580 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 581 { 582 struct stat sb; 583 char *filename; 584 int error; 585 586 LCONVPATHEXIST(td, args->filename, &filename); 587 588 #ifdef DEBUG 589 if (ldebug(lstat64)) 590 printf(ARGS(lstat64, "%s, *"), args->filename); 591 #endif 592 593 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 594 LFREEPATH(filename); 595 if (error) 596 return (error); 597 return (stat64_copyout(&sb, args->statbuf)); 598 } 599 600 int 601 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 602 { 603 struct stat buf; 604 int error; 605 606 #ifdef DEBUG 607 if (ldebug(fstat64)) 608 printf(ARGS(fstat64, "%d, *"), args->fd); 609 #endif 610 611 error = kern_fstat(td, args->fd, &buf); 612 translate_fd_major_minor(td, args->fd, &buf); 613 if (!error) 614 error = stat64_copyout(&buf, args->statbuf); 615 616 return (error); 617 } 618 619 int 620 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 621 { 622 char *path; 623 int error, dfd, flag; 624 struct stat buf; 625 626 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 627 return (EINVAL); 628 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 629 AT_SYMLINK_NOFOLLOW : 0; 630 631 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 632 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 633 634 #ifdef DEBUG 635 if (ldebug(fstatat64)) 636 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 637 #endif 638 639 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 640 if (!error) 641 error = stat64_copyout(&buf, args->statbuf); 642 LFREEPATH(path); 643 644 return (error); 645 } 646 647 #else /* __amd64__ && !COMPAT_LINUX32 */ 648 649 int 650 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 651 { 652 char *path; 653 int error, dfd, flag; 654 struct stat buf; 655 656 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 657 return (EINVAL); 658 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 659 AT_SYMLINK_NOFOLLOW : 0; 660 661 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 662 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 663 664 #ifdef DEBUG 665 if (ldebug(newfstatat)) 666 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 667 #endif 668 669 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 670 if (error == 0) 671 error = newstat_copyout(&buf, args->statbuf); 672 LFREEPATH(path); 673 674 return (error); 675 } 676 677 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 678 679 int 680 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 681 { 682 struct mount *mp; 683 struct vnode *vp; 684 int error, save; 685 686 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 687 if (error != 0) 688 /* 689 * Linux syncfs() returns only EBADF, however fgetvp() 690 * can return EINVAL in case of file descriptor does 691 * not represent a vnode. XXX. 692 */ 693 return (error); 694 695 mp = vp->v_mount; 696 mtx_lock(&mountlist_mtx); 697 error = vfs_busy(mp, MBF_MNTLSTLOCK); 698 if (error != 0) { 699 /* See comment above. */ 700 mtx_unlock(&mountlist_mtx); 701 goto out; 702 } 703 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 704 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 705 save = curthread_pflags_set(TDP_SYNCIO); 706 vfs_msync(mp, MNT_NOWAIT); 707 VFS_SYNC(mp, MNT_NOWAIT); 708 curthread_pflags_restore(save); 709 vn_finished_write(mp); 710 } 711 vfs_unbusy(mp); 712 713 out: 714 vrele(vp); 715 return (error); 716 } 717