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/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 /* 102 * XXX: This was removed from newstat_copyout(), and almost identical 103 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced 104 * XXX: with something that does lookup and locking properly. 105 * XXX: When somebody fixes this: please try to avoid duplicating it. 106 */ 107 #if 0 108 static void 109 disk_foo(struct somestat *tbuf) 110 { 111 struct cdevsw *cdevsw; 112 struct cdev *dev; 113 114 /* Lie about disk drives which are character devices 115 * in FreeBSD but block devices under Linux. 116 */ 117 if (S_ISCHR(tbuf.st_mode) && 118 (dev = findcdev(buf->st_rdev)) != NULL) { 119 cdevsw = dev_refthread(dev); 120 if (cdevsw != NULL) { 121 if (cdevsw->d_flags & D_DISK) { 122 tbuf.st_mode &= ~S_IFMT; 123 tbuf.st_mode |= S_IFBLK; 124 125 /* XXX this may not be quite right */ 126 /* Map major number to 0 */ 127 tbuf.st_dev = minor(buf->st_dev) & 0xf; 128 tbuf.st_rdev = buf->st_rdev & 0xff; 129 } 130 dev_relthread(dev); 131 } 132 } 133 134 } 135 #endif 136 137 static void 138 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 139 { 140 struct file *fp; 141 struct vnode *vp; 142 cap_rights_t rights; 143 int major, minor; 144 145 /* 146 * No capability rights required here. 147 */ 148 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 149 fget(td, fd, cap_rights_init(&rights), &fp) != 0) 150 return; 151 vp = fp->f_vnode; 152 if (vp != NULL && vp->v_rdev != NULL && 153 linux_driver_get_major_minor(devtoname(vp->v_rdev), 154 &major, &minor) == 0) { 155 buf->st_rdev = (major << 8 | minor); 156 } else if (fp->f_type == DTYPE_PTS) { 157 struct tty *tp = fp->f_data; 158 159 /* Convert the numbers for the slave device. */ 160 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 161 &major, &minor) == 0) { 162 buf->st_rdev = (major << 8 | minor); 163 } 164 } 165 fdrop(fp, td); 166 } 167 168 static int 169 newstat_copyout(struct stat *buf, void *ubuf) 170 { 171 struct l_newstat tbuf; 172 173 bzero(&tbuf, sizeof(tbuf)); 174 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 175 tbuf.st_ino = buf->st_ino; 176 tbuf.st_mode = buf->st_mode; 177 tbuf.st_nlink = buf->st_nlink; 178 tbuf.st_uid = buf->st_uid; 179 tbuf.st_gid = buf->st_gid; 180 tbuf.st_rdev = buf->st_rdev; 181 tbuf.st_size = buf->st_size; 182 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 183 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 184 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 185 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 186 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 187 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 188 tbuf.st_blksize = buf->st_blksize; 189 tbuf.st_blocks = buf->st_blocks; 190 191 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 192 } 193 194 int 195 linux_newstat(struct thread *td, struct linux_newstat_args *args) 196 { 197 struct stat buf; 198 char *path; 199 int error; 200 201 LCONVPATHEXIST(td, args->path, &path); 202 203 #ifdef DEBUG 204 if (ldebug(newstat)) 205 printf(ARGS(newstat, "%s, *"), path); 206 #endif 207 208 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 209 LFREEPATH(path); 210 if (error) 211 return (error); 212 return (newstat_copyout(&buf, args->buf)); 213 } 214 215 int 216 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 217 { 218 struct stat sb; 219 char *path; 220 int error; 221 222 LCONVPATHEXIST(td, args->path, &path); 223 224 #ifdef DEBUG 225 if (ldebug(newlstat)) 226 printf(ARGS(newlstat, "%s, *"), path); 227 #endif 228 229 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 230 LFREEPATH(path); 231 if (error) 232 return (error); 233 return (newstat_copyout(&sb, args->buf)); 234 } 235 236 int 237 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 238 { 239 struct stat buf; 240 int error; 241 242 #ifdef DEBUG 243 if (ldebug(newfstat)) 244 printf(ARGS(newfstat, "%d, *"), args->fd); 245 #endif 246 247 error = kern_fstat(td, args->fd, &buf); 248 translate_fd_major_minor(td, args->fd, &buf); 249 if (!error) 250 error = newstat_copyout(&buf, args->buf); 251 252 return (error); 253 } 254 255 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 256 static int 257 stat_copyout(struct stat *buf, void *ubuf) 258 { 259 struct l_stat lbuf; 260 261 bzero(&lbuf, sizeof(lbuf)); 262 lbuf.st_dev = buf->st_dev; 263 lbuf.st_ino = buf->st_ino; 264 lbuf.st_mode = buf->st_mode; 265 lbuf.st_nlink = buf->st_nlink; 266 lbuf.st_uid = buf->st_uid; 267 lbuf.st_gid = buf->st_gid; 268 lbuf.st_rdev = buf->st_rdev; 269 if (buf->st_size < (quad_t)1 << 32) 270 lbuf.st_size = buf->st_size; 271 else 272 lbuf.st_size = -2; 273 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 274 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 275 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 276 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 277 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 278 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 279 lbuf.st_blksize = buf->st_blksize; 280 lbuf.st_blocks = buf->st_blocks; 281 lbuf.st_flags = buf->st_flags; 282 lbuf.st_gen = buf->st_gen; 283 284 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 285 } 286 287 int 288 linux_stat(struct thread *td, struct linux_stat_args *args) 289 { 290 struct stat buf; 291 char *path; 292 int error; 293 294 LCONVPATHEXIST(td, args->path, &path); 295 296 #ifdef DEBUG 297 if (ldebug(stat)) 298 printf(ARGS(stat, "%s, *"), path); 299 #endif 300 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 301 if (error) { 302 LFREEPATH(path); 303 return (error); 304 } 305 LFREEPATH(path); 306 return (stat_copyout(&buf, args->up)); 307 } 308 309 int 310 linux_lstat(struct thread *td, struct linux_lstat_args *args) 311 { 312 struct stat buf; 313 char *path; 314 int error; 315 316 LCONVPATHEXIST(td, args->path, &path); 317 318 #ifdef DEBUG 319 if (ldebug(lstat)) 320 printf(ARGS(lstat, "%s, *"), path); 321 #endif 322 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 323 if (error) { 324 LFREEPATH(path); 325 return (error); 326 } 327 LFREEPATH(path); 328 return (stat_copyout(&buf, args->up)); 329 } 330 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 331 332 struct l_statfs { 333 l_long f_type; 334 l_long f_bsize; 335 l_long f_blocks; 336 l_long f_bfree; 337 l_long f_bavail; 338 l_long f_files; 339 l_long f_ffree; 340 l_fsid_t f_fsid; 341 l_long f_namelen; 342 l_long f_spare[6]; 343 }; 344 345 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 346 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 347 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 348 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 349 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 350 #define LINUX_NCP_SUPER_MAGIC 0x564cL 351 #define LINUX_NFS_SUPER_MAGIC 0x6969L 352 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 353 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 354 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 355 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 356 #define LINUX_SHMFS_MAGIC 0x01021994 357 358 static long 359 bsd_to_linux_ftype(const char *fstypename) 360 { 361 int i; 362 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 363 {"ufs", LINUX_UFS_SUPER_MAGIC}, 364 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 365 {"nfs", LINUX_NFS_SUPER_MAGIC}, 366 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 367 {"procfs", LINUX_PROC_SUPER_MAGIC}, 368 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 369 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 370 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 371 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 372 {"coda", LINUX_CODA_SUPER_MAGIC}, 373 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 374 {"tmpfs", LINUX_SHMFS_MAGIC}, 375 {NULL, 0L}}; 376 377 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 378 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 379 return (b2l_tbl[i].linux_type); 380 381 return (0L); 382 } 383 384 static int 385 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 386 { 387 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 388 uint64_t tmp; 389 390 #define LINUX_HIBITS 0xffffffff00000000ULL 391 392 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 393 bsd_statfs->f_bsize; 394 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 395 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 396 (tmp & LINUX_HIBITS)) 397 return (EOVERFLOW); 398 #undef LINUX_HIBITS 399 #endif 400 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 401 linux_statfs->f_bsize = bsd_statfs->f_bsize; 402 linux_statfs->f_blocks = bsd_statfs->f_blocks; 403 linux_statfs->f_bfree = bsd_statfs->f_bfree; 404 linux_statfs->f_bavail = bsd_statfs->f_bavail; 405 linux_statfs->f_ffree = bsd_statfs->f_ffree; 406 linux_statfs->f_files = bsd_statfs->f_files; 407 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 408 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 409 linux_statfs->f_namelen = MAXNAMLEN; 410 411 return (0); 412 } 413 414 int 415 linux_statfs(struct thread *td, struct linux_statfs_args *args) 416 { 417 struct l_statfs linux_statfs; 418 struct statfs bsd_statfs; 419 char *path; 420 int error; 421 422 LCONVPATHEXIST(td, args->path, &path); 423 424 #ifdef DEBUG 425 if (ldebug(statfs)) 426 printf(ARGS(statfs, "%s, *"), path); 427 #endif 428 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 429 LFREEPATH(path); 430 if (error) 431 return (error); 432 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 433 if (error) 434 return (error); 435 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 436 } 437 438 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 439 static void 440 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 441 { 442 443 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 444 linux_statfs->f_bsize = bsd_statfs->f_bsize; 445 linux_statfs->f_blocks = bsd_statfs->f_blocks; 446 linux_statfs->f_bfree = bsd_statfs->f_bfree; 447 linux_statfs->f_bavail = bsd_statfs->f_bavail; 448 linux_statfs->f_ffree = bsd_statfs->f_ffree; 449 linux_statfs->f_files = bsd_statfs->f_files; 450 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 451 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 452 linux_statfs->f_namelen = MAXNAMLEN; 453 } 454 455 int 456 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 457 { 458 struct l_statfs64 linux_statfs; 459 struct statfs bsd_statfs; 460 char *path; 461 int error; 462 463 if (args->bufsize != sizeof(struct l_statfs64)) 464 return EINVAL; 465 466 LCONVPATHEXIST(td, args->path, &path); 467 468 #ifdef DEBUG 469 if (ldebug(statfs64)) 470 printf(ARGS(statfs64, "%s, *"), path); 471 #endif 472 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 473 LFREEPATH(path); 474 if (error) 475 return (error); 476 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs); 477 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 478 } 479 480 int 481 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 482 { 483 struct l_statfs64 linux_statfs; 484 struct statfs bsd_statfs; 485 int error; 486 487 #ifdef DEBUG 488 if (ldebug(fstatfs64)) 489 printf(ARGS(fstatfs64, "%d, *"), args->fd); 490 #endif 491 if (args->bufsize != sizeof(struct l_statfs64)) 492 return (EINVAL); 493 494 error = kern_fstatfs(td, args->fd, &bsd_statfs); 495 if (error) 496 return error; 497 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs); 498 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 499 } 500 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 501 502 int 503 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 504 { 505 struct l_statfs linux_statfs; 506 struct statfs bsd_statfs; 507 int error; 508 509 #ifdef DEBUG 510 if (ldebug(fstatfs)) 511 printf(ARGS(fstatfs, "%d, *"), args->fd); 512 #endif 513 error = kern_fstatfs(td, args->fd, &bsd_statfs); 514 if (error) 515 return (error); 516 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 517 if (error) 518 return (error); 519 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 520 } 521 522 struct l_ustat 523 { 524 l_daddr_t f_tfree; 525 l_ino_t f_tinode; 526 char f_fname[6]; 527 char f_fpack[6]; 528 }; 529 530 int 531 linux_ustat(struct thread *td, struct linux_ustat_args *args) 532 { 533 #ifdef DEBUG 534 if (ldebug(ustat)) 535 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 536 #endif 537 538 return (EOPNOTSUPP); 539 } 540 541 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 542 543 static int 544 stat64_copyout(struct stat *buf, void *ubuf) 545 { 546 struct l_stat64 lbuf; 547 548 bzero(&lbuf, sizeof(lbuf)); 549 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 550 lbuf.st_ino = buf->st_ino; 551 lbuf.st_mode = buf->st_mode; 552 lbuf.st_nlink = buf->st_nlink; 553 lbuf.st_uid = buf->st_uid; 554 lbuf.st_gid = buf->st_gid; 555 lbuf.st_rdev = buf->st_rdev; 556 lbuf.st_size = buf->st_size; 557 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 558 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 559 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 560 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 561 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 562 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 563 lbuf.st_blksize = buf->st_blksize; 564 lbuf.st_blocks = buf->st_blocks; 565 566 /* 567 * The __st_ino field makes all the difference. In the Linux kernel 568 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 569 * but without the assignment to __st_ino the runtime linker refuses 570 * to mmap(2) any shared libraries. I guess it's broken alright :-) 571 */ 572 lbuf.__st_ino = buf->st_ino; 573 574 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 575 } 576 577 int 578 linux_stat64(struct thread *td, struct linux_stat64_args *args) 579 { 580 struct stat buf; 581 char *filename; 582 int error; 583 584 LCONVPATHEXIST(td, args->filename, &filename); 585 586 #ifdef DEBUG 587 if (ldebug(stat64)) 588 printf(ARGS(stat64, "%s, *"), filename); 589 #endif 590 591 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 592 LFREEPATH(filename); 593 if (error) 594 return (error); 595 return (stat64_copyout(&buf, args->statbuf)); 596 } 597 598 int 599 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 600 { 601 struct stat sb; 602 char *filename; 603 int error; 604 605 LCONVPATHEXIST(td, args->filename, &filename); 606 607 #ifdef DEBUG 608 if (ldebug(lstat64)) 609 printf(ARGS(lstat64, "%s, *"), args->filename); 610 #endif 611 612 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 613 LFREEPATH(filename); 614 if (error) 615 return (error); 616 return (stat64_copyout(&sb, args->statbuf)); 617 } 618 619 int 620 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 621 { 622 struct stat buf; 623 int error; 624 625 #ifdef DEBUG 626 if (ldebug(fstat64)) 627 printf(ARGS(fstat64, "%d, *"), args->fd); 628 #endif 629 630 error = kern_fstat(td, args->fd, &buf); 631 translate_fd_major_minor(td, args->fd, &buf); 632 if (!error) 633 error = stat64_copyout(&buf, args->statbuf); 634 635 return (error); 636 } 637 638 int 639 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 640 { 641 char *path; 642 int error, dfd, flag; 643 struct stat buf; 644 645 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 646 return (EINVAL); 647 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 648 AT_SYMLINK_NOFOLLOW : 0; 649 650 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 651 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 652 653 #ifdef DEBUG 654 if (ldebug(fstatat64)) 655 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 656 #endif 657 658 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 659 if (!error) 660 error = stat64_copyout(&buf, args->statbuf); 661 LFREEPATH(path); 662 663 return (error); 664 } 665 666 #else /* __amd64__ && !COMPAT_LINUX32 */ 667 668 int 669 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 670 { 671 char *path; 672 int error, dfd, flag; 673 struct stat buf; 674 675 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 676 return (EINVAL); 677 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 678 AT_SYMLINK_NOFOLLOW : 0; 679 680 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 681 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 682 683 #ifdef DEBUG 684 if (ldebug(newfstatat)) 685 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 686 #endif 687 688 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 689 if (error == 0) 690 error = newstat_copyout(&buf, args->statbuf); 691 LFREEPATH(path); 692 693 return (error); 694 } 695 696 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 697 698 int 699 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 700 { 701 cap_rights_t rights; 702 struct mount *mp; 703 struct vnode *vp; 704 int error, save; 705 706 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp); 707 if (error != 0) 708 /* 709 * Linux syncfs() returns only EBADF, however fgetvp() 710 * can return EINVAL in case of file descriptor does 711 * not represent a vnode. XXX. 712 */ 713 return (error); 714 715 mp = vp->v_mount; 716 mtx_lock(&mountlist_mtx); 717 error = vfs_busy(mp, MBF_MNTLSTLOCK); 718 if (error != 0) { 719 /* See comment above. */ 720 mtx_unlock(&mountlist_mtx); 721 goto out; 722 } 723 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 724 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 725 save = curthread_pflags_set(TDP_SYNCIO); 726 vfs_msync(mp, MNT_NOWAIT); 727 VFS_SYNC(mp, MNT_NOWAIT); 728 curthread_pflags_restore(save); 729 vn_finished_write(mp); 730 } 731 vfs_unbusy(mp); 732 733 out: 734 vrele(vp); 735 return (error); 736 } 737