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