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 static void 63 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 64 { 65 int major, minor; 66 67 if (vn_isdisk(vp)) { 68 sb->st_mode &= ~S_IFMT; 69 sb->st_mode |= S_IFBLK; 70 } 71 72 /* 73 * Return the same st_dev for every devfs instance. The reason 74 * for this is to work around an idiosyncrasy of glibc getttynam() 75 * implementation: it checks whether st_dev returned for fd 0 76 * is the same as st_dev returned for the target of /proc/self/fd/0 77 * symlink, and with linux chroots having their own devfs instance, 78 * the check will fail if you chroot into it. 79 */ 80 if (rootdevmp != NULL && vp->v_mount->mnt_vfc == rootdevmp->mnt_vfc) 81 sb->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 82 83 if (linux_vn_get_major_minor(vp, &major, &minor) == 0) 84 sb->st_rdev = (major << 8 | minor); 85 } 86 87 static int 88 linux_kern_statat(struct thread *td, int flag, int fd, const char *path, 89 enum uio_seg pathseg, struct stat *sbp) 90 { 91 92 return (kern_statat(td, flag, fd, path, pathseg, sbp, 93 translate_vnhook_major_minor)); 94 } 95 96 #ifdef LINUX_LEGACY_SYSCALLS 97 static int 98 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 99 struct stat *sbp) 100 { 101 102 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 103 } 104 105 static int 106 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 107 struct stat *sbp) 108 { 109 110 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 111 pathseg, sbp)); 112 } 113 #endif 114 115 static void 116 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 117 { 118 struct file *fp; 119 struct vnode *vp; 120 struct mount *mp; 121 int major, minor; 122 123 /* 124 * No capability rights required here. 125 */ 126 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 127 fget(td, fd, &cap_no_rights, &fp) != 0) 128 return; 129 vp = fp->f_vnode; 130 if (vp != NULL && vn_isdisk(vp)) { 131 buf->st_mode &= ~S_IFMT; 132 buf->st_mode |= S_IFBLK; 133 } 134 if (vp != NULL && rootdevmp != NULL) { 135 mp = vp->v_mount; 136 __compiler_membar(); 137 if (mp != NULL && mp->mnt_vfc == rootdevmp->mnt_vfc) 138 buf->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 139 } 140 if (linux_vn_get_major_minor(vp, &major, &minor) == 0) { 141 buf->st_rdev = (major << 8 | minor); 142 } else if (fp->f_type == DTYPE_PTS) { 143 struct tty *tp = fp->f_data; 144 145 /* Convert the numbers for the slave device. */ 146 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 147 &major, &minor) == 0) { 148 buf->st_rdev = (major << 8 | minor); 149 } 150 } 151 fdrop(fp, td); 152 } 153 154 /* 155 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so 156 * truncation of a dev_t to 16 bits gives the same result as unpacking 157 * using major() and minor() and repacking in the l_dev_t format. This 158 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's 159 * are not checked for, as for other fields. 160 * 161 * dev_to_ldev() is only used for translating st_dev. When we convert 162 * st_rdev for copying it out, it isn't really a dev_t, but has already 163 * been translated to an l_dev_t in a nontrivial way. Translating it 164 * again would be illogical but would have no effect since the low 16 165 * bits have the same encoding. 166 * 167 * The nontrivial translation for st_rdev renumbers some devices, but not 168 * ones that can be mounted on, so it is consistent with the translation 169 * for st_dev except when the renumbering or truncation causes conflicts. 170 */ 171 #define dev_to_ldev(d) ((uint16_t)(d)) 172 173 static int 174 newstat_copyout(struct stat *buf, void *ubuf) 175 { 176 struct l_newstat tbuf; 177 178 bzero(&tbuf, sizeof(tbuf)); 179 tbuf.st_dev = dev_to_ldev(buf->st_dev); 180 tbuf.st_ino = buf->st_ino; 181 tbuf.st_mode = buf->st_mode; 182 tbuf.st_nlink = buf->st_nlink; 183 tbuf.st_uid = buf->st_uid; 184 tbuf.st_gid = buf->st_gid; 185 tbuf.st_rdev = buf->st_rdev; 186 tbuf.st_size = buf->st_size; 187 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 188 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 189 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 190 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 191 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 192 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 193 tbuf.st_blksize = buf->st_blksize; 194 tbuf.st_blocks = buf->st_blocks; 195 196 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 197 } 198 199 #ifdef LINUX_LEGACY_SYSCALLS 200 int 201 linux_newstat(struct thread *td, struct linux_newstat_args *args) 202 { 203 struct stat buf; 204 char *path; 205 int error; 206 207 if (!LUSECONVPATH(td)) { 208 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 209 } else { 210 LCONVPATHEXIST(td, args->path, &path); 211 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 212 LFREEPATH(path); 213 } 214 if (error) 215 return (error); 216 return (newstat_copyout(&buf, args->buf)); 217 } 218 219 int 220 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 221 { 222 struct stat sb; 223 char *path; 224 int error; 225 226 if (!LUSECONVPATH(td)) { 227 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 228 } else { 229 LCONVPATHEXIST(td, args->path, &path); 230 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 231 LFREEPATH(path); 232 } 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 if (!LUSECONVPATH(td)) { 290 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 291 } else { 292 LCONVPATHEXIST(td, args->path, &path); 293 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 294 LFREEPATH(path); 295 } 296 if (error) { 297 return (error); 298 } 299 return (stat_copyout(&buf, args->up)); 300 } 301 302 int 303 linux_lstat(struct thread *td, struct linux_lstat_args *args) 304 { 305 struct stat buf; 306 char *path; 307 int error; 308 309 if (!LUSECONVPATH(td)) { 310 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 311 } else { 312 LCONVPATHEXIST(td, args->path, &path); 313 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 314 LFREEPATH(path); 315 } 316 if (error) { 317 return (error); 318 } 319 return (stat_copyout(&buf, args->up)); 320 } 321 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 322 323 struct l_statfs { 324 l_long f_type; 325 l_long f_bsize; 326 l_long f_blocks; 327 l_long f_bfree; 328 l_long f_bavail; 329 l_long f_files; 330 l_long f_ffree; 331 l_fsid_t f_fsid; 332 l_long f_namelen; 333 l_long f_frsize; 334 l_long f_flags; 335 l_long f_spare[4]; 336 }; 337 338 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 339 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 340 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 341 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 342 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 343 #define LINUX_NCP_SUPER_MAGIC 0x564cL 344 #define LINUX_NFS_SUPER_MAGIC 0x6969L 345 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 346 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 347 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 348 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 349 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 350 #define LINUX_SHMFS_MAGIC 0x01021994 351 352 static long 353 bsd_to_linux_ftype(const char *fstypename) 354 { 355 int i; 356 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 357 {"ufs", LINUX_UFS_SUPER_MAGIC}, 358 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 359 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 360 {"nfs", LINUX_NFS_SUPER_MAGIC}, 361 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 362 {"procfs", LINUX_PROC_SUPER_MAGIC}, 363 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 364 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 365 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 366 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 367 {"coda", LINUX_CODA_SUPER_MAGIC}, 368 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 369 {"tmpfs", LINUX_SHMFS_MAGIC}, 370 {NULL, 0L}}; 371 372 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 373 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 374 return (b2l_tbl[i].linux_type); 375 376 return (0L); 377 } 378 379 static int 380 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 381 { 382 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 383 uint64_t tmp; 384 385 #define LINUX_HIBITS 0xffffffff00000000ULL 386 387 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 388 bsd_statfs->f_bsize; 389 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 390 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 391 (tmp & LINUX_HIBITS)) 392 return (EOVERFLOW); 393 #undef LINUX_HIBITS 394 #endif 395 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 396 linux_statfs->f_bsize = bsd_statfs->f_bsize; 397 linux_statfs->f_blocks = bsd_statfs->f_blocks; 398 linux_statfs->f_bfree = bsd_statfs->f_bfree; 399 linux_statfs->f_bavail = bsd_statfs->f_bavail; 400 linux_statfs->f_ffree = bsd_statfs->f_ffree; 401 linux_statfs->f_files = bsd_statfs->f_files; 402 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 403 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 404 linux_statfs->f_namelen = MAXNAMLEN; 405 linux_statfs->f_frsize = bsd_statfs->f_bsize; 406 linux_statfs->f_flags = 0; 407 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 408 409 return (0); 410 } 411 412 int 413 linux_statfs(struct thread *td, struct linux_statfs_args *args) 414 { 415 struct l_statfs linux_statfs; 416 struct statfs *bsd_statfs; 417 char *path; 418 int error; 419 420 if (!LUSECONVPATH(td)) { 421 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 422 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 423 } else { 424 LCONVPATHEXIST(td, args->path, &path); 425 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 426 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 427 LFREEPATH(path); 428 } 429 if (error == 0) 430 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 431 free(bsd_statfs, M_STATFS); 432 if (error != 0) 433 return (error); 434 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 435 } 436 437 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 438 static void 439 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 440 { 441 442 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 443 linux_statfs->f_bsize = bsd_statfs->f_bsize; 444 linux_statfs->f_blocks = bsd_statfs->f_blocks; 445 linux_statfs->f_bfree = bsd_statfs->f_bfree; 446 linux_statfs->f_bavail = bsd_statfs->f_bavail; 447 linux_statfs->f_ffree = bsd_statfs->f_ffree; 448 linux_statfs->f_files = bsd_statfs->f_files; 449 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 450 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 451 linux_statfs->f_namelen = MAXNAMLEN; 452 linux_statfs->f_frsize = bsd_statfs->f_bsize; 453 linux_statfs->f_flags = 0; 454 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 455 } 456 457 int 458 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 459 { 460 struct l_statfs64 linux_statfs; 461 struct statfs *bsd_statfs; 462 char *path; 463 int error; 464 465 if (args->bufsize != sizeof(struct l_statfs64)) 466 return (EINVAL); 467 468 if (!LUSECONVPATH(td)) { 469 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 470 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 471 } else { 472 LCONVPATHEXIST(td, args->path, &path); 473 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 474 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 475 LFREEPATH(path); 476 } 477 if (error == 0) 478 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 479 free(bsd_statfs, M_STATFS); 480 if (error != 0) 481 return (error); 482 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 483 } 484 485 int 486 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 487 { 488 struct l_statfs64 linux_statfs; 489 struct statfs *bsd_statfs; 490 int error; 491 492 if (args->bufsize != sizeof(struct l_statfs64)) 493 return (EINVAL); 494 495 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 496 error = kern_fstatfs(td, args->fd, bsd_statfs); 497 if (error == 0) 498 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 499 free(bsd_statfs, M_STATFS); 500 if (error != 0) 501 return (error); 502 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 503 } 504 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 505 506 int 507 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 508 { 509 struct l_statfs linux_statfs; 510 struct statfs *bsd_statfs; 511 int error; 512 513 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 514 error = kern_fstatfs(td, args->fd, bsd_statfs); 515 if (error == 0) 516 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 517 free(bsd_statfs, M_STATFS); 518 if (error != 0) 519 return (error); 520 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 521 } 522 523 struct l_ustat 524 { 525 l_daddr_t f_tfree; 526 l_ino_t f_tinode; 527 char f_fname[6]; 528 char f_fpack[6]; 529 }; 530 531 #ifdef LINUX_LEGACY_SYSCALLS 532 int 533 linux_ustat(struct thread *td, struct linux_ustat_args *args) 534 { 535 536 return (EOPNOTSUPP); 537 } 538 #endif 539 540 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 541 542 static int 543 stat64_copyout(struct stat *buf, void *ubuf) 544 { 545 struct l_stat64 lbuf; 546 547 bzero(&lbuf, sizeof(lbuf)); 548 lbuf.st_dev = dev_to_ldev(buf->st_dev); 549 lbuf.st_ino = buf->st_ino; 550 lbuf.st_mode = buf->st_mode; 551 lbuf.st_nlink = buf->st_nlink; 552 lbuf.st_uid = buf->st_uid; 553 lbuf.st_gid = buf->st_gid; 554 lbuf.st_rdev = buf->st_rdev; 555 lbuf.st_size = buf->st_size; 556 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 557 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 558 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 559 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 560 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 561 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 562 lbuf.st_blksize = buf->st_blksize; 563 lbuf.st_blocks = buf->st_blocks; 564 565 /* 566 * The __st_ino field makes all the difference. In the Linux kernel 567 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 568 * but without the assignment to __st_ino the runtime linker refuses 569 * to mmap(2) any shared libraries. I guess it's broken alright :-) 570 */ 571 lbuf.__st_ino = buf->st_ino; 572 573 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 574 } 575 576 int 577 linux_stat64(struct thread *td, struct linux_stat64_args *args) 578 { 579 struct stat buf; 580 char *filename; 581 int error; 582 583 if (!LUSECONVPATH(td)) { 584 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 585 } else { 586 LCONVPATHEXIST(td, args->filename, &filename); 587 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 588 LFREEPATH(filename); 589 } 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 if (!LUSECONVPATH(td)) { 603 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 604 } else { 605 LCONVPATHEXIST(td, args->filename, &filename); 606 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 607 LFREEPATH(filename); 608 } 609 if (error) 610 return (error); 611 return (stat64_copyout(&sb, args->statbuf)); 612 } 613 614 int 615 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 616 { 617 struct stat buf; 618 int error; 619 620 error = kern_fstat(td, args->fd, &buf); 621 translate_fd_major_minor(td, args->fd, &buf); 622 if (!error) 623 error = stat64_copyout(&buf, args->statbuf); 624 625 return (error); 626 } 627 628 int 629 linux_fstatat64(struct thread *td, struct linux_fstatat64_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 if (!LUSECONVPATH(td)) { 642 error = linux_kern_statat(td, flag, dfd, args->pathname, 643 UIO_USERSPACE, &buf); 644 } else { 645 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 646 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 647 LFREEPATH(path); 648 } 649 if (error == 0) 650 error = stat64_copyout(&buf, args->statbuf); 651 652 return (error); 653 } 654 655 #else /* __amd64__ && !COMPAT_LINUX32 */ 656 657 int 658 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 659 { 660 char *path; 661 int error, dfd, flag; 662 struct stat buf; 663 664 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 665 return (EINVAL); 666 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 667 AT_SYMLINK_NOFOLLOW : 0; 668 669 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 670 if (!LUSECONVPATH(td)) { 671 error = linux_kern_statat(td, flag, dfd, args->pathname, 672 UIO_USERSPACE, &buf); 673 } else { 674 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 675 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 676 LFREEPATH(path); 677 } 678 if (error == 0) 679 error = newstat_copyout(&buf, args->statbuf); 680 681 return (error); 682 } 683 684 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 685 686 int 687 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 688 { 689 struct mount *mp; 690 struct vnode *vp; 691 int error, save; 692 693 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 694 if (error != 0) 695 /* 696 * Linux syncfs() returns only EBADF, however fgetvp() 697 * can return EINVAL in case of file descriptor does 698 * not represent a vnode. XXX. 699 */ 700 return (error); 701 702 mp = vp->v_mount; 703 mtx_lock(&mountlist_mtx); 704 error = vfs_busy(mp, MBF_MNTLSTLOCK); 705 if (error != 0) { 706 /* See comment above. */ 707 mtx_unlock(&mountlist_mtx); 708 goto out; 709 } 710 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 711 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 712 save = curthread_pflags_set(TDP_SYNCIO); 713 vfs_periodic(mp, MNT_NOWAIT); 714 VFS_SYNC(mp, MNT_NOWAIT); 715 curthread_pflags_restore(save); 716 vn_finished_write(mp); 717 } 718 vfs_unbusy(mp); 719 720 out: 721 vrele(vp); 722 return (error); 723 } 724