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