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 (vn_isdisk(vp, NULL)) { 69 sb->st_mode &= ~S_IFMT; 70 sb->st_mode |= S_IFBLK; 71 } 72 73 /* 74 * Return the same st_dev for every devfs instance. The reason 75 * for this is to work around an idiosyncrasy of glibc getttynam() 76 * implementation: it checks whether st_dev returned for fd 0 77 * is the same as st_dev returned for the target of /proc/self/fd/0 78 * symlink, and with linux chroots having their own devfs instance, 79 * the check will fail if you chroot into it. 80 */ 81 if (rootdevmp != NULL && vp->v_mount->mnt_vfc == rootdevmp->mnt_vfc) 82 sb->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 83 84 if (vp->v_type == VCHR && vp->v_rdev != NULL && 85 linux_driver_get_major_minor(devtoname(vp->v_rdev), 86 &major, &minor) == 0) { 87 sb->st_rdev = (major << 8 | minor); 88 } 89 } 90 91 static int 92 linux_kern_statat(struct thread *td, int flag, int fd, char *path, 93 enum uio_seg pathseg, struct stat *sbp) 94 { 95 96 return (kern_statat(td, flag, fd, path, pathseg, sbp, 97 translate_vnhook_major_minor)); 98 } 99 100 #ifdef LINUX_LEGACY_SYSCALLS 101 static int 102 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, 103 struct stat *sbp) 104 { 105 106 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 107 } 108 109 static int 110 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, 111 struct stat *sbp) 112 { 113 114 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 115 pathseg, sbp)); 116 } 117 #endif 118 119 static void 120 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 121 { 122 struct file *fp; 123 struct vnode *vp; 124 struct mount *mp; 125 int major, minor; 126 127 /* 128 * No capability rights required here. 129 */ 130 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 131 fget(td, fd, &cap_no_rights, &fp) != 0) 132 return; 133 vp = fp->f_vnode; 134 if (vp != NULL && vn_isdisk(vp, NULL)) { 135 buf->st_mode &= ~S_IFMT; 136 buf->st_mode |= S_IFBLK; 137 } 138 if (vp != NULL && rootdevmp != NULL) { 139 mp = vp->v_mount; 140 __compiler_membar(); 141 if (mp != NULL && mp->mnt_vfc == rootdevmp->mnt_vfc) 142 buf->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 143 } 144 if (vp != NULL && vp->v_rdev != NULL && 145 linux_driver_get_major_minor(devtoname(vp->v_rdev), 146 &major, &minor) == 0) { 147 buf->st_rdev = (major << 8 | minor); 148 } else if (fp->f_type == DTYPE_PTS) { 149 struct tty *tp = fp->f_data; 150 151 /* Convert the numbers for the slave device. */ 152 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 153 &major, &minor) == 0) { 154 buf->st_rdev = (major << 8 | minor); 155 } 156 } 157 fdrop(fp, td); 158 } 159 160 /* 161 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so 162 * truncation of a dev_t to 16 bits gives the same result as unpacking 163 * using major() and minor() and repacking in the l_dev_t format. This 164 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's 165 * are not checked for, as for other fields. 166 * 167 * dev_to_ldev() is only used for translating st_dev. When we convert 168 * st_rdev for copying it out, it isn't really a dev_t, but has already 169 * been translated to an l_dev_t in a nontrivial way. Translating it 170 * again would be illogical but would have no effect since the low 16 171 * bits have the same encoding. 172 * 173 * The nontrivial translation for st_rdev renumbers some devices, but not 174 * ones that can be mounted on, so it is consistent with the translation 175 * for st_dev except when the renumbering or truncation causes conflicts. 176 */ 177 #define dev_to_ldev(d) ((uint16_t)(d)) 178 179 static int 180 newstat_copyout(struct stat *buf, void *ubuf) 181 { 182 struct l_newstat tbuf; 183 184 bzero(&tbuf, sizeof(tbuf)); 185 tbuf.st_dev = dev_to_ldev(buf->st_dev); 186 tbuf.st_ino = buf->st_ino; 187 tbuf.st_mode = buf->st_mode; 188 tbuf.st_nlink = buf->st_nlink; 189 tbuf.st_uid = buf->st_uid; 190 tbuf.st_gid = buf->st_gid; 191 tbuf.st_rdev = buf->st_rdev; 192 tbuf.st_size = buf->st_size; 193 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 194 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 195 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 196 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 197 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 198 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 199 tbuf.st_blksize = buf->st_blksize; 200 tbuf.st_blocks = buf->st_blocks; 201 202 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 203 } 204 205 #ifdef LINUX_LEGACY_SYSCALLS 206 int 207 linux_newstat(struct thread *td, struct linux_newstat_args *args) 208 { 209 struct stat buf; 210 char *path; 211 int error; 212 213 LCONVPATHEXIST(td, args->path, &path); 214 215 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 216 LFREEPATH(path); 217 if (error) 218 return (error); 219 return (newstat_copyout(&buf, args->buf)); 220 } 221 222 int 223 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 224 { 225 struct stat sb; 226 char *path; 227 int error; 228 229 LCONVPATHEXIST(td, args->path, &path); 230 231 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 232 LFREEPATH(path); 233 if (error) 234 return (error); 235 return (newstat_copyout(&sb, args->buf)); 236 } 237 #endif 238 239 int 240 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 241 { 242 struct stat buf; 243 int error; 244 245 error = kern_fstat(td, args->fd, &buf); 246 translate_fd_major_minor(td, args->fd, &buf); 247 if (!error) 248 error = newstat_copyout(&buf, args->buf); 249 250 return (error); 251 } 252 253 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 254 static int 255 stat_copyout(struct stat *buf, void *ubuf) 256 { 257 struct l_stat lbuf; 258 259 bzero(&lbuf, sizeof(lbuf)); 260 lbuf.st_dev = dev_to_ldev(buf->st_dev); 261 lbuf.st_ino = buf->st_ino; 262 lbuf.st_mode = buf->st_mode; 263 lbuf.st_nlink = buf->st_nlink; 264 lbuf.st_uid = buf->st_uid; 265 lbuf.st_gid = buf->st_gid; 266 lbuf.st_rdev = buf->st_rdev; 267 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 268 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 269 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 270 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 271 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 272 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 273 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 274 lbuf.st_blksize = buf->st_blksize; 275 lbuf.st_blocks = buf->st_blocks; 276 lbuf.st_flags = buf->st_flags; 277 lbuf.st_gen = buf->st_gen; 278 279 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 280 } 281 282 int 283 linux_stat(struct thread *td, struct linux_stat_args *args) 284 { 285 struct stat buf; 286 char *path; 287 int error; 288 289 LCONVPATHEXIST(td, args->path, &path); 290 291 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 292 if (error) { 293 LFREEPATH(path); 294 return (error); 295 } 296 LFREEPATH(path); 297 return (stat_copyout(&buf, args->up)); 298 } 299 300 int 301 linux_lstat(struct thread *td, struct linux_lstat_args *args) 302 { 303 struct stat buf; 304 char *path; 305 int error; 306 307 LCONVPATHEXIST(td, args->path, &path); 308 309 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 310 if (error) { 311 LFREEPATH(path); 312 return (error); 313 } 314 LFREEPATH(path); 315 return (stat_copyout(&buf, args->up)); 316 } 317 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 318 319 struct l_statfs { 320 l_long f_type; 321 l_long f_bsize; 322 l_long f_blocks; 323 l_long f_bfree; 324 l_long f_bavail; 325 l_long f_files; 326 l_long f_ffree; 327 l_fsid_t f_fsid; 328 l_long f_namelen; 329 l_long f_frsize; 330 l_long f_flags; 331 l_long f_spare[4]; 332 }; 333 334 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 335 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 336 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 337 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 338 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 339 #define LINUX_NCP_SUPER_MAGIC 0x564cL 340 #define LINUX_NFS_SUPER_MAGIC 0x6969L 341 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 342 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 343 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 344 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 345 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 346 #define LINUX_SHMFS_MAGIC 0x01021994 347 348 static long 349 bsd_to_linux_ftype(const char *fstypename) 350 { 351 int i; 352 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 353 {"ufs", LINUX_UFS_SUPER_MAGIC}, 354 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 355 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 356 {"nfs", LINUX_NFS_SUPER_MAGIC}, 357 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 358 {"procfs", LINUX_PROC_SUPER_MAGIC}, 359 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 360 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 361 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 362 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 363 {"coda", LINUX_CODA_SUPER_MAGIC}, 364 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 365 {"tmpfs", LINUX_SHMFS_MAGIC}, 366 {NULL, 0L}}; 367 368 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 369 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 370 return (b2l_tbl[i].linux_type); 371 372 return (0L); 373 } 374 375 static int 376 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 377 { 378 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 379 uint64_t tmp; 380 381 #define LINUX_HIBITS 0xffffffff00000000ULL 382 383 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 384 bsd_statfs->f_bsize; 385 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 386 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 387 (tmp & LINUX_HIBITS)) 388 return (EOVERFLOW); 389 #undef LINUX_HIBITS 390 #endif 391 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 392 linux_statfs->f_bsize = bsd_statfs->f_bsize; 393 linux_statfs->f_blocks = bsd_statfs->f_blocks; 394 linux_statfs->f_bfree = bsd_statfs->f_bfree; 395 linux_statfs->f_bavail = bsd_statfs->f_bavail; 396 linux_statfs->f_ffree = bsd_statfs->f_ffree; 397 linux_statfs->f_files = bsd_statfs->f_files; 398 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 399 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 400 linux_statfs->f_namelen = MAXNAMLEN; 401 linux_statfs->f_frsize = bsd_statfs->f_bsize; 402 linux_statfs->f_flags = 0; 403 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 404 405 return (0); 406 } 407 408 int 409 linux_statfs(struct thread *td, struct linux_statfs_args *args) 410 { 411 struct l_statfs linux_statfs; 412 struct statfs *bsd_statfs; 413 char *path; 414 int error; 415 416 LCONVPATHEXIST(td, args->path, &path); 417 418 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 419 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 420 LFREEPATH(path); 421 if (error == 0) 422 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 423 free(bsd_statfs, M_STATFS); 424 if (error != 0) 425 return (error); 426 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 427 } 428 429 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 430 static void 431 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 432 { 433 434 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 435 linux_statfs->f_bsize = bsd_statfs->f_bsize; 436 linux_statfs->f_blocks = bsd_statfs->f_blocks; 437 linux_statfs->f_bfree = bsd_statfs->f_bfree; 438 linux_statfs->f_bavail = bsd_statfs->f_bavail; 439 linux_statfs->f_ffree = bsd_statfs->f_ffree; 440 linux_statfs->f_files = bsd_statfs->f_files; 441 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 442 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 443 linux_statfs->f_namelen = MAXNAMLEN; 444 linux_statfs->f_frsize = bsd_statfs->f_bsize; 445 linux_statfs->f_flags = 0; 446 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 447 } 448 449 int 450 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 451 { 452 struct l_statfs64 linux_statfs; 453 struct statfs *bsd_statfs; 454 char *path; 455 int error; 456 457 if (args->bufsize != sizeof(struct l_statfs64)) 458 return (EINVAL); 459 460 LCONVPATHEXIST(td, args->path, &path); 461 462 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 if (args->bufsize != sizeof(struct l_statfs64)) 481 return (EINVAL); 482 483 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 484 error = kern_fstatfs(td, args->fd, bsd_statfs); 485 if (error == 0) 486 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 487 free(bsd_statfs, M_STATFS); 488 if (error != 0) 489 return (error); 490 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 491 } 492 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 493 494 int 495 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 496 { 497 struct l_statfs linux_statfs; 498 struct statfs *bsd_statfs; 499 int error; 500 501 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 502 error = kern_fstatfs(td, args->fd, bsd_statfs); 503 if (error == 0) 504 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 505 free(bsd_statfs, M_STATFS); 506 if (error != 0) 507 return (error); 508 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 509 } 510 511 struct l_ustat 512 { 513 l_daddr_t f_tfree; 514 l_ino_t f_tinode; 515 char f_fname[6]; 516 char f_fpack[6]; 517 }; 518 519 #ifdef LINUX_LEGACY_SYSCALLS 520 int 521 linux_ustat(struct thread *td, struct linux_ustat_args *args) 522 { 523 524 return (EOPNOTSUPP); 525 } 526 #endif 527 528 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 529 530 static int 531 stat64_copyout(struct stat *buf, void *ubuf) 532 { 533 struct l_stat64 lbuf; 534 535 bzero(&lbuf, sizeof(lbuf)); 536 lbuf.st_dev = dev_to_ldev(buf->st_dev); 537 lbuf.st_ino = buf->st_ino; 538 lbuf.st_mode = buf->st_mode; 539 lbuf.st_nlink = buf->st_nlink; 540 lbuf.st_uid = buf->st_uid; 541 lbuf.st_gid = buf->st_gid; 542 lbuf.st_rdev = buf->st_rdev; 543 lbuf.st_size = buf->st_size; 544 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 545 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 546 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 547 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 548 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 549 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 550 lbuf.st_blksize = buf->st_blksize; 551 lbuf.st_blocks = buf->st_blocks; 552 553 /* 554 * The __st_ino field makes all the difference. In the Linux kernel 555 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 556 * but without the assignment to __st_ino the runtime linker refuses 557 * to mmap(2) any shared libraries. I guess it's broken alright :-) 558 */ 559 lbuf.__st_ino = buf->st_ino; 560 561 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 562 } 563 564 int 565 linux_stat64(struct thread *td, struct linux_stat64_args *args) 566 { 567 struct stat buf; 568 char *filename; 569 int error; 570 571 LCONVPATHEXIST(td, args->filename, &filename); 572 573 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 574 LFREEPATH(filename); 575 if (error) 576 return (error); 577 return (stat64_copyout(&buf, args->statbuf)); 578 } 579 580 int 581 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 582 { 583 struct stat sb; 584 char *filename; 585 int error; 586 587 LCONVPATHEXIST(td, args->filename, &filename); 588 589 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 590 LFREEPATH(filename); 591 if (error) 592 return (error); 593 return (stat64_copyout(&sb, args->statbuf)); 594 } 595 596 int 597 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 598 { 599 struct stat buf; 600 int error; 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 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 626 if (!error) 627 error = stat64_copyout(&buf, args->statbuf); 628 LFREEPATH(path); 629 630 return (error); 631 } 632 633 #else /* __amd64__ && !COMPAT_LINUX32 */ 634 635 int 636 linux_newfstatat(struct thread *td, struct linux_newfstatat_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 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 651 if (error == 0) 652 error = newstat_copyout(&buf, args->statbuf); 653 LFREEPATH(path); 654 655 return (error); 656 } 657 658 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 659 660 int 661 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 662 { 663 struct mount *mp; 664 struct vnode *vp; 665 int error, save; 666 667 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 668 if (error != 0) 669 /* 670 * Linux syncfs() returns only EBADF, however fgetvp() 671 * can return EINVAL in case of file descriptor does 672 * not represent a vnode. XXX. 673 */ 674 return (error); 675 676 mp = vp->v_mount; 677 mtx_lock(&mountlist_mtx); 678 error = vfs_busy(mp, MBF_MNTLSTLOCK); 679 if (error != 0) { 680 /* See comment above. */ 681 mtx_unlock(&mountlist_mtx); 682 goto out; 683 } 684 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 685 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 686 save = curthread_pflags_set(TDP_SYNCIO); 687 vfs_periodic(mp, MNT_NOWAIT); 688 VFS_SYNC(mp, MNT_NOWAIT); 689 curthread_pflags_restore(save); 690 vn_finished_write(mp); 691 } 692 vfs_unbusy(mp); 693 694 out: 695 vrele(vp); 696 return (error); 697 } 698