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 /* 132 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so 133 * truncation of a dev_t to 16 bits gives the same result as unpacking 134 * using major() and minor() and repacking in the l_dev_t format. This 135 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's 136 * are not checked for, as for other fields. 137 * 138 * dev_to_ldev() is only used for translating st_dev. When we convert 139 * st_rdev for copying it out, it isn't really a dev_t, but has already 140 * been translated to an l_dev_t in a nontrivial way. Translating it 141 * again would be illogical but would have no effect since the low 16 142 * bits have the same encoding. 143 * 144 * The nontrivial translation for st_rdev renumbers some devices, but not 145 * ones that can be mounted on, so it is consistent with the translation 146 * for st_dev except when the renumbering or truncation causes conflicts. 147 */ 148 #define dev_to_ldev(d) ((uint16_t)(d)) 149 150 static int 151 newstat_copyout(struct stat *buf, void *ubuf) 152 { 153 struct l_newstat tbuf; 154 155 bzero(&tbuf, sizeof(tbuf)); 156 tbuf.st_dev = dev_to_ldev(buf->st_dev); 157 tbuf.st_ino = buf->st_ino; 158 tbuf.st_mode = buf->st_mode; 159 tbuf.st_nlink = buf->st_nlink; 160 tbuf.st_uid = buf->st_uid; 161 tbuf.st_gid = buf->st_gid; 162 tbuf.st_rdev = buf->st_rdev; 163 tbuf.st_size = buf->st_size; 164 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 165 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 166 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 167 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 168 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 169 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 170 tbuf.st_blksize = buf->st_blksize; 171 tbuf.st_blocks = buf->st_blocks; 172 173 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 174 } 175 176 int 177 linux_newstat(struct thread *td, struct linux_newstat_args *args) 178 { 179 struct stat buf; 180 char *path; 181 int error; 182 183 LCONVPATHEXIST(td, args->path, &path); 184 185 #ifdef DEBUG 186 if (ldebug(newstat)) 187 printf(ARGS(newstat, "%s, *"), path); 188 #endif 189 190 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 191 LFREEPATH(path); 192 if (error) 193 return (error); 194 return (newstat_copyout(&buf, args->buf)); 195 } 196 197 int 198 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 199 { 200 struct stat sb; 201 char *path; 202 int error; 203 204 LCONVPATHEXIST(td, args->path, &path); 205 206 #ifdef DEBUG 207 if (ldebug(newlstat)) 208 printf(ARGS(newlstat, "%s, *"), path); 209 #endif 210 211 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 212 LFREEPATH(path); 213 if (error) 214 return (error); 215 return (newstat_copyout(&sb, args->buf)); 216 } 217 218 int 219 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 220 { 221 struct stat buf; 222 int error; 223 224 #ifdef DEBUG 225 if (ldebug(newfstat)) 226 printf(ARGS(newfstat, "%d, *"), args->fd); 227 #endif 228 229 error = kern_fstat(td, args->fd, &buf); 230 translate_fd_major_minor(td, args->fd, &buf); 231 if (!error) 232 error = newstat_copyout(&buf, args->buf); 233 234 return (error); 235 } 236 237 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 238 static int 239 stat_copyout(struct stat *buf, void *ubuf) 240 { 241 struct l_stat lbuf; 242 243 bzero(&lbuf, sizeof(lbuf)); 244 lbuf.st_dev = dev_to_ldev(buf->st_dev); 245 lbuf.st_ino = buf->st_ino; 246 lbuf.st_mode = buf->st_mode; 247 lbuf.st_nlink = buf->st_nlink; 248 lbuf.st_uid = buf->st_uid; 249 lbuf.st_gid = buf->st_gid; 250 lbuf.st_rdev = buf->st_rdev; 251 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 252 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 253 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 254 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 255 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 256 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 257 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 258 lbuf.st_blksize = buf->st_blksize; 259 lbuf.st_blocks = buf->st_blocks; 260 lbuf.st_flags = buf->st_flags; 261 lbuf.st_gen = buf->st_gen; 262 263 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 264 } 265 266 int 267 linux_stat(struct thread *td, struct linux_stat_args *args) 268 { 269 struct stat buf; 270 char *path; 271 int error; 272 273 LCONVPATHEXIST(td, args->path, &path); 274 275 #ifdef DEBUG 276 if (ldebug(stat)) 277 printf(ARGS(stat, "%s, *"), path); 278 #endif 279 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 280 if (error) { 281 LFREEPATH(path); 282 return (error); 283 } 284 LFREEPATH(path); 285 return (stat_copyout(&buf, args->up)); 286 } 287 288 int 289 linux_lstat(struct thread *td, struct linux_lstat_args *args) 290 { 291 struct stat buf; 292 char *path; 293 int error; 294 295 LCONVPATHEXIST(td, args->path, &path); 296 297 #ifdef DEBUG 298 if (ldebug(lstat)) 299 printf(ARGS(lstat, "%s, *"), path); 300 #endif 301 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 302 if (error) { 303 LFREEPATH(path); 304 return (error); 305 } 306 LFREEPATH(path); 307 return (stat_copyout(&buf, args->up)); 308 } 309 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 310 311 struct l_statfs { 312 l_long f_type; 313 l_long f_bsize; 314 l_long f_blocks; 315 l_long f_bfree; 316 l_long f_bavail; 317 l_long f_files; 318 l_long f_ffree; 319 l_fsid_t f_fsid; 320 l_long f_namelen; 321 l_long f_frsize; 322 l_long f_flags; 323 l_long f_spare[4]; 324 }; 325 326 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 327 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 328 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 329 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 330 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 331 #define LINUX_NCP_SUPER_MAGIC 0x564cL 332 #define LINUX_NFS_SUPER_MAGIC 0x6969L 333 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 334 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 335 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 336 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 337 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 338 #define LINUX_SHMFS_MAGIC 0x01021994 339 340 static long 341 bsd_to_linux_ftype(const char *fstypename) 342 { 343 int i; 344 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 345 {"ufs", LINUX_UFS_SUPER_MAGIC}, 346 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 347 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 348 {"nfs", LINUX_NFS_SUPER_MAGIC}, 349 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 350 {"procfs", LINUX_PROC_SUPER_MAGIC}, 351 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 352 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 353 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 354 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 355 {"coda", LINUX_CODA_SUPER_MAGIC}, 356 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 357 {"tmpfs", LINUX_SHMFS_MAGIC}, 358 {NULL, 0L}}; 359 360 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 361 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 362 return (b2l_tbl[i].linux_type); 363 364 return (0L); 365 } 366 367 static int 368 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 369 { 370 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 371 uint64_t tmp; 372 373 #define LINUX_HIBITS 0xffffffff00000000ULL 374 375 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 376 bsd_statfs->f_bsize; 377 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 378 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 379 (tmp & LINUX_HIBITS)) 380 return (EOVERFLOW); 381 #undef LINUX_HIBITS 382 #endif 383 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 384 linux_statfs->f_bsize = bsd_statfs->f_bsize; 385 linux_statfs->f_blocks = bsd_statfs->f_blocks; 386 linux_statfs->f_bfree = bsd_statfs->f_bfree; 387 linux_statfs->f_bavail = bsd_statfs->f_bavail; 388 linux_statfs->f_ffree = bsd_statfs->f_ffree; 389 linux_statfs->f_files = bsd_statfs->f_files; 390 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 391 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 392 linux_statfs->f_namelen = MAXNAMLEN; 393 linux_statfs->f_frsize = bsd_statfs->f_bsize; 394 linux_statfs->f_flags = 0; 395 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 396 397 return (0); 398 } 399 400 int 401 linux_statfs(struct thread *td, struct linux_statfs_args *args) 402 { 403 struct l_statfs linux_statfs; 404 struct statfs *bsd_statfs; 405 char *path; 406 int error; 407 408 LCONVPATHEXIST(td, args->path, &path); 409 410 #ifdef DEBUG 411 if (ldebug(statfs)) 412 printf(ARGS(statfs, "%s, *"), path); 413 #endif 414 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 415 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 416 LFREEPATH(path); 417 if (error == 0) 418 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 419 free(bsd_statfs, M_STATFS); 420 if (error != 0) 421 return (error); 422 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 423 } 424 425 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 426 static void 427 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 428 { 429 430 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 431 linux_statfs->f_bsize = bsd_statfs->f_bsize; 432 linux_statfs->f_blocks = bsd_statfs->f_blocks; 433 linux_statfs->f_bfree = bsd_statfs->f_bfree; 434 linux_statfs->f_bavail = bsd_statfs->f_bavail; 435 linux_statfs->f_ffree = bsd_statfs->f_ffree; 436 linux_statfs->f_files = bsd_statfs->f_files; 437 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 438 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 439 linux_statfs->f_namelen = MAXNAMLEN; 440 linux_statfs->f_frsize = bsd_statfs->f_bsize; 441 linux_statfs->f_flags = 0; 442 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 443 } 444 445 int 446 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 447 { 448 struct l_statfs64 linux_statfs; 449 struct statfs *bsd_statfs; 450 char *path; 451 int error; 452 453 if (args->bufsize != sizeof(struct l_statfs64)) 454 return (EINVAL); 455 456 LCONVPATHEXIST(td, args->path, &path); 457 458 #ifdef DEBUG 459 if (ldebug(statfs64)) 460 printf(ARGS(statfs64, "%s, *"), path); 461 #endif 462 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 463 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 464 LFREEPATH(path); 465 if (error == 0) 466 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 467 free(bsd_statfs, M_STATFS); 468 if (error != 0) 469 return (error); 470 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 471 } 472 473 int 474 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 475 { 476 struct l_statfs64 linux_statfs; 477 struct statfs *bsd_statfs; 478 int error; 479 480 #ifdef DEBUG 481 if (ldebug(fstatfs64)) 482 printf(ARGS(fstatfs64, "%d, *"), args->fd); 483 #endif 484 if (args->bufsize != sizeof(struct l_statfs64)) 485 return (EINVAL); 486 487 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 488 error = kern_fstatfs(td, args->fd, bsd_statfs); 489 if (error == 0) 490 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 491 free(bsd_statfs, M_STATFS); 492 if (error != 0) 493 return (error); 494 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 495 } 496 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 497 498 int 499 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 500 { 501 struct l_statfs linux_statfs; 502 struct statfs *bsd_statfs; 503 int error; 504 505 #ifdef DEBUG 506 if (ldebug(fstatfs)) 507 printf(ARGS(fstatfs, "%d, *"), args->fd); 508 #endif 509 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 510 error = kern_fstatfs(td, args->fd, bsd_statfs); 511 if (error == 0) 512 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 513 free(bsd_statfs, M_STATFS); 514 if (error != 0) 515 return (error); 516 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 517 } 518 519 struct l_ustat 520 { 521 l_daddr_t f_tfree; 522 l_ino_t f_tinode; 523 char f_fname[6]; 524 char f_fpack[6]; 525 }; 526 527 int 528 linux_ustat(struct thread *td, struct linux_ustat_args *args) 529 { 530 #ifdef DEBUG 531 if (ldebug(ustat)) 532 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 533 #endif 534 535 return (EOPNOTSUPP); 536 } 537 538 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 539 540 static int 541 stat64_copyout(struct stat *buf, void *ubuf) 542 { 543 struct l_stat64 lbuf; 544 545 bzero(&lbuf, sizeof(lbuf)); 546 lbuf.st_dev = dev_to_ldev(buf->st_dev); 547 lbuf.st_ino = buf->st_ino; 548 lbuf.st_mode = buf->st_mode; 549 lbuf.st_nlink = buf->st_nlink; 550 lbuf.st_uid = buf->st_uid; 551 lbuf.st_gid = buf->st_gid; 552 lbuf.st_rdev = buf->st_rdev; 553 lbuf.st_size = buf->st_size; 554 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 555 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 556 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 557 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 558 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 559 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 560 lbuf.st_blksize = buf->st_blksize; 561 lbuf.st_blocks = buf->st_blocks; 562 563 /* 564 * The __st_ino field makes all the difference. In the Linux kernel 565 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 566 * but without the assignment to __st_ino the runtime linker refuses 567 * to mmap(2) any shared libraries. I guess it's broken alright :-) 568 */ 569 lbuf.__st_ino = buf->st_ino; 570 571 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 572 } 573 574 int 575 linux_stat64(struct thread *td, struct linux_stat64_args *args) 576 { 577 struct stat buf; 578 char *filename; 579 int error; 580 581 LCONVPATHEXIST(td, args->filename, &filename); 582 583 #ifdef DEBUG 584 if (ldebug(stat64)) 585 printf(ARGS(stat64, "%s, *"), filename); 586 #endif 587 588 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 589 LFREEPATH(filename); 590 if (error) 591 return (error); 592 return (stat64_copyout(&buf, args->statbuf)); 593 } 594 595 int 596 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 597 { 598 struct stat sb; 599 char *filename; 600 int error; 601 602 LCONVPATHEXIST(td, args->filename, &filename); 603 604 #ifdef DEBUG 605 if (ldebug(lstat64)) 606 printf(ARGS(lstat64, "%s, *"), args->filename); 607 #endif 608 609 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 610 LFREEPATH(filename); 611 if (error) 612 return (error); 613 return (stat64_copyout(&sb, args->statbuf)); 614 } 615 616 int 617 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 618 { 619 struct stat buf; 620 int error; 621 622 #ifdef DEBUG 623 if (ldebug(fstat64)) 624 printf(ARGS(fstat64, "%d, *"), args->fd); 625 #endif 626 627 error = kern_fstat(td, args->fd, &buf); 628 translate_fd_major_minor(td, args->fd, &buf); 629 if (!error) 630 error = stat64_copyout(&buf, args->statbuf); 631 632 return (error); 633 } 634 635 int 636 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 637 { 638 char *path; 639 int error, dfd, flag; 640 struct stat buf; 641 642 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 643 return (EINVAL); 644 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 645 AT_SYMLINK_NOFOLLOW : 0; 646 647 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 648 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 649 650 #ifdef DEBUG 651 if (ldebug(fstatat64)) 652 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 653 #endif 654 655 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 656 if (!error) 657 error = stat64_copyout(&buf, args->statbuf); 658 LFREEPATH(path); 659 660 return (error); 661 } 662 663 #else /* __amd64__ && !COMPAT_LINUX32 */ 664 665 int 666 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 667 { 668 char *path; 669 int error, dfd, flag; 670 struct stat buf; 671 672 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 673 return (EINVAL); 674 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 675 AT_SYMLINK_NOFOLLOW : 0; 676 677 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 678 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 679 680 #ifdef DEBUG 681 if (ldebug(newfstatat)) 682 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 683 #endif 684 685 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 686 if (error == 0) 687 error = newstat_copyout(&buf, args->statbuf); 688 LFREEPATH(path); 689 690 return (error); 691 } 692 693 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 694 695 int 696 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 697 { 698 struct mount *mp; 699 struct vnode *vp; 700 int error, save; 701 702 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 703 if (error != 0) 704 /* 705 * Linux syncfs() returns only EBADF, however fgetvp() 706 * can return EINVAL in case of file descriptor does 707 * not represent a vnode. XXX. 708 */ 709 return (error); 710 711 mp = vp->v_mount; 712 mtx_lock(&mountlist_mtx); 713 error = vfs_busy(mp, MBF_MNTLSTLOCK); 714 if (error != 0) { 715 /* See comment above. */ 716 mtx_unlock(&mountlist_mtx); 717 goto out; 718 } 719 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 720 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 721 save = curthread_pflags_set(TDP_SYNCIO); 722 vfs_msync(mp, MNT_NOWAIT); 723 VFS_SYNC(mp, MNT_NOWAIT); 724 curthread_pflags_restore(save); 725 vn_finished_write(mp); 726 } 727 vfs_unbusy(mp); 728 729 out: 730 vrele(vp); 731 return (error); 732 } 733