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)) { 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, const 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, const 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, const 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)) { 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 if (!LUSECONVPATH(td)) { 214 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 215 } else { 216 LCONVPATHEXIST(td, args->path, &path); 217 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 218 LFREEPATH(path); 219 } 220 if (error) 221 return (error); 222 return (newstat_copyout(&buf, args->buf)); 223 } 224 225 int 226 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 227 { 228 struct stat sb; 229 char *path; 230 int error; 231 232 if (!LUSECONVPATH(td)) { 233 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 234 } else { 235 LCONVPATHEXIST(td, args->path, &path); 236 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 237 LFREEPATH(path); 238 } 239 if (error) 240 return (error); 241 return (newstat_copyout(&sb, args->buf)); 242 } 243 #endif 244 245 int 246 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 247 { 248 struct stat buf; 249 int error; 250 251 error = kern_fstat(td, args->fd, &buf); 252 translate_fd_major_minor(td, args->fd, &buf); 253 if (!error) 254 error = newstat_copyout(&buf, args->buf); 255 256 return (error); 257 } 258 259 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 260 static int 261 stat_copyout(struct stat *buf, void *ubuf) 262 { 263 struct l_stat lbuf; 264 265 bzero(&lbuf, sizeof(lbuf)); 266 lbuf.st_dev = dev_to_ldev(buf->st_dev); 267 lbuf.st_ino = buf->st_ino; 268 lbuf.st_mode = buf->st_mode; 269 lbuf.st_nlink = buf->st_nlink; 270 lbuf.st_uid = buf->st_uid; 271 lbuf.st_gid = buf->st_gid; 272 lbuf.st_rdev = buf->st_rdev; 273 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 274 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 275 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 276 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 277 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 278 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 279 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 280 lbuf.st_blksize = buf->st_blksize; 281 lbuf.st_blocks = buf->st_blocks; 282 lbuf.st_flags = buf->st_flags; 283 lbuf.st_gen = buf->st_gen; 284 285 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 286 } 287 288 int 289 linux_stat(struct thread *td, struct linux_stat_args *args) 290 { 291 struct stat buf; 292 char *path; 293 int error; 294 295 if (!LUSECONVPATH(td)) { 296 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 297 } else { 298 LCONVPATHEXIST(td, args->path, &path); 299 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 300 LFREEPATH(path); 301 } 302 if (error) { 303 return (error); 304 } 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 if (!LUSECONVPATH(td)) { 316 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 317 } else { 318 LCONVPATHEXIST(td, args->path, &path); 319 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 320 LFREEPATH(path); 321 } 322 if (error) { 323 return (error); 324 } 325 return (stat_copyout(&buf, args->up)); 326 } 327 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 328 329 struct l_statfs { 330 l_long f_type; 331 l_long f_bsize; 332 l_long f_blocks; 333 l_long f_bfree; 334 l_long f_bavail; 335 l_long f_files; 336 l_long f_ffree; 337 l_fsid_t f_fsid; 338 l_long f_namelen; 339 l_long f_frsize; 340 l_long f_flags; 341 l_long f_spare[4]; 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_ZFS_SUPER_MAGIC 0x2FC12FC1 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 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 365 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 366 {"nfs", LINUX_NFS_SUPER_MAGIC}, 367 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 368 {"procfs", LINUX_PROC_SUPER_MAGIC}, 369 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 370 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 371 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 372 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 373 {"coda", LINUX_CODA_SUPER_MAGIC}, 374 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 375 {"tmpfs", LINUX_SHMFS_MAGIC}, 376 {NULL, 0L}}; 377 378 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 379 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 380 return (b2l_tbl[i].linux_type); 381 382 return (0L); 383 } 384 385 static int 386 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 387 { 388 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 389 uint64_t tmp; 390 391 #define LINUX_HIBITS 0xffffffff00000000ULL 392 393 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 394 bsd_statfs->f_bsize; 395 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 396 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 397 (tmp & LINUX_HIBITS)) 398 return (EOVERFLOW); 399 #undef LINUX_HIBITS 400 #endif 401 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 402 linux_statfs->f_bsize = bsd_statfs->f_bsize; 403 linux_statfs->f_blocks = bsd_statfs->f_blocks; 404 linux_statfs->f_bfree = bsd_statfs->f_bfree; 405 linux_statfs->f_bavail = bsd_statfs->f_bavail; 406 linux_statfs->f_ffree = bsd_statfs->f_ffree; 407 linux_statfs->f_files = bsd_statfs->f_files; 408 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 409 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 410 linux_statfs->f_namelen = MAXNAMLEN; 411 linux_statfs->f_frsize = bsd_statfs->f_bsize; 412 linux_statfs->f_flags = 0; 413 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 414 415 return (0); 416 } 417 418 int 419 linux_statfs(struct thread *td, struct linux_statfs_args *args) 420 { 421 struct l_statfs linux_statfs; 422 struct statfs *bsd_statfs; 423 char *path; 424 int error; 425 426 if (!LUSECONVPATH(td)) { 427 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 428 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 429 } else { 430 LCONVPATHEXIST(td, args->path, &path); 431 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 432 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 433 LFREEPATH(path); 434 } 435 if (error == 0) 436 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 437 free(bsd_statfs, M_STATFS); 438 if (error != 0) 439 return (error); 440 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 441 } 442 443 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 444 static void 445 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 446 { 447 448 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 449 linux_statfs->f_bsize = bsd_statfs->f_bsize; 450 linux_statfs->f_blocks = bsd_statfs->f_blocks; 451 linux_statfs->f_bfree = bsd_statfs->f_bfree; 452 linux_statfs->f_bavail = bsd_statfs->f_bavail; 453 linux_statfs->f_ffree = bsd_statfs->f_ffree; 454 linux_statfs->f_files = bsd_statfs->f_files; 455 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 456 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 457 linux_statfs->f_namelen = MAXNAMLEN; 458 linux_statfs->f_frsize = bsd_statfs->f_bsize; 459 linux_statfs->f_flags = 0; 460 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 461 } 462 463 int 464 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 465 { 466 struct l_statfs64 linux_statfs; 467 struct statfs *bsd_statfs; 468 char *path; 469 int error; 470 471 if (args->bufsize != sizeof(struct l_statfs64)) 472 return (EINVAL); 473 474 if (!LUSECONVPATH(td)) { 475 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 476 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 477 } else { 478 LCONVPATHEXIST(td, args->path, &path); 479 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 480 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 481 LFREEPATH(path); 482 } 483 if (error == 0) 484 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 485 free(bsd_statfs, M_STATFS); 486 if (error != 0) 487 return (error); 488 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 489 } 490 491 int 492 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 493 { 494 struct l_statfs64 linux_statfs; 495 struct statfs *bsd_statfs; 496 int error; 497 498 if (args->bufsize != sizeof(struct l_statfs64)) 499 return (EINVAL); 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 bsd_to_linux_statfs64(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 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 511 512 int 513 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 514 { 515 struct l_statfs linux_statfs; 516 struct statfs *bsd_statfs; 517 int error; 518 519 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 520 error = kern_fstatfs(td, args->fd, bsd_statfs); 521 if (error == 0) 522 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 523 free(bsd_statfs, M_STATFS); 524 if (error != 0) 525 return (error); 526 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 527 } 528 529 struct l_ustat 530 { 531 l_daddr_t f_tfree; 532 l_ino_t f_tinode; 533 char f_fname[6]; 534 char f_fpack[6]; 535 }; 536 537 #ifdef LINUX_LEGACY_SYSCALLS 538 int 539 linux_ustat(struct thread *td, struct linux_ustat_args *args) 540 { 541 542 return (EOPNOTSUPP); 543 } 544 #endif 545 546 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 547 548 static int 549 stat64_copyout(struct stat *buf, void *ubuf) 550 { 551 struct l_stat64 lbuf; 552 553 bzero(&lbuf, sizeof(lbuf)); 554 lbuf.st_dev = dev_to_ldev(buf->st_dev); 555 lbuf.st_ino = buf->st_ino; 556 lbuf.st_mode = buf->st_mode; 557 lbuf.st_nlink = buf->st_nlink; 558 lbuf.st_uid = buf->st_uid; 559 lbuf.st_gid = buf->st_gid; 560 lbuf.st_rdev = buf->st_rdev; 561 lbuf.st_size = buf->st_size; 562 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 563 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 564 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 565 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 566 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 567 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 568 lbuf.st_blksize = buf->st_blksize; 569 lbuf.st_blocks = buf->st_blocks; 570 571 /* 572 * The __st_ino field makes all the difference. In the Linux kernel 573 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 574 * but without the assignment to __st_ino the runtime linker refuses 575 * to mmap(2) any shared libraries. I guess it's broken alright :-) 576 */ 577 lbuf.__st_ino = buf->st_ino; 578 579 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 580 } 581 582 int 583 linux_stat64(struct thread *td, struct linux_stat64_args *args) 584 { 585 struct stat buf; 586 char *filename; 587 int error; 588 589 if (!LUSECONVPATH(td)) { 590 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 591 } else { 592 LCONVPATHEXIST(td, args->filename, &filename); 593 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 594 LFREEPATH(filename); 595 } 596 if (error) 597 return (error); 598 return (stat64_copyout(&buf, args->statbuf)); 599 } 600 601 int 602 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 603 { 604 struct stat sb; 605 char *filename; 606 int error; 607 608 if (!LUSECONVPATH(td)) { 609 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 610 } else { 611 LCONVPATHEXIST(td, args->filename, &filename); 612 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 613 LFREEPATH(filename); 614 } 615 if (error) 616 return (error); 617 return (stat64_copyout(&sb, args->statbuf)); 618 } 619 620 int 621 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 622 { 623 struct stat buf; 624 int error; 625 626 error = kern_fstat(td, args->fd, &buf); 627 translate_fd_major_minor(td, args->fd, &buf); 628 if (!error) 629 error = stat64_copyout(&buf, args->statbuf); 630 631 return (error); 632 } 633 634 int 635 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 636 { 637 char *path; 638 int error, dfd, flag; 639 struct stat buf; 640 641 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 642 return (EINVAL); 643 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 644 AT_SYMLINK_NOFOLLOW : 0; 645 646 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 647 if (!LUSECONVPATH(td)) { 648 error = linux_kern_statat(td, flag, dfd, args->pathname, 649 UIO_USERSPACE, &buf); 650 } else { 651 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 652 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 653 LFREEPATH(path); 654 } 655 if (error == 0) 656 error = stat64_copyout(&buf, args->statbuf); 657 658 return (error); 659 } 660 661 #else /* __amd64__ && !COMPAT_LINUX32 */ 662 663 int 664 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 665 { 666 char *path; 667 int error, dfd, flag; 668 struct stat buf; 669 670 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 671 return (EINVAL); 672 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 673 AT_SYMLINK_NOFOLLOW : 0; 674 675 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 676 if (!LUSECONVPATH(td)) { 677 error = linux_kern_statat(td, flag, dfd, args->pathname, 678 UIO_USERSPACE, &buf); 679 } else { 680 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 681 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 682 LFREEPATH(path); 683 } 684 if (error == 0) 685 error = newstat_copyout(&buf, args->statbuf); 686 687 return (error); 688 } 689 690 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 691 692 int 693 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 694 { 695 struct mount *mp; 696 struct vnode *vp; 697 int error, save; 698 699 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 700 if (error != 0) 701 /* 702 * Linux syncfs() returns only EBADF, however fgetvp() 703 * can return EINVAL in case of file descriptor does 704 * not represent a vnode. XXX. 705 */ 706 return (error); 707 708 mp = vp->v_mount; 709 mtx_lock(&mountlist_mtx); 710 error = vfs_busy(mp, MBF_MNTLSTLOCK); 711 if (error != 0) { 712 /* See comment above. */ 713 mtx_unlock(&mountlist_mtx); 714 goto out; 715 } 716 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 717 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 718 save = curthread_pflags_set(TDP_SYNCIO); 719 vfs_periodic(mp, MNT_NOWAIT); 720 VFS_SYNC(mp, MNT_NOWAIT); 721 curthread_pflags_restore(save); 722 vn_finished_write(mp); 723 } 724 vfs_unbusy(mp); 725 726 out: 727 vrele(vp); 728 return (error); 729 } 730