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 #ifdef LINUX_LEGACY_SYSCALLS 85 static int 86 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, 87 struct stat *sbp) 88 { 89 90 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 91 } 92 93 static int 94 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, 95 struct stat *sbp) 96 { 97 98 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 99 pathseg, sbp)); 100 } 101 #endif 102 103 static void 104 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 105 { 106 struct file *fp; 107 struct vnode *vp; 108 int major, minor; 109 110 /* 111 * No capability rights required here. 112 */ 113 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 114 fget(td, fd, &cap_no_rights, &fp) != 0) 115 return; 116 vp = fp->f_vnode; 117 if (vp != NULL && vp->v_rdev != NULL && 118 linux_driver_get_major_minor(devtoname(vp->v_rdev), 119 &major, &minor) == 0) { 120 buf->st_rdev = (major << 8 | minor); 121 } else if (fp->f_type == DTYPE_PTS) { 122 struct tty *tp = fp->f_data; 123 124 /* Convert the numbers for the slave device. */ 125 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 126 &major, &minor) == 0) { 127 buf->st_rdev = (major << 8 | minor); 128 } 129 } 130 fdrop(fp, td); 131 } 132 133 /* 134 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so 135 * truncation of a dev_t to 16 bits gives the same result as unpacking 136 * using major() and minor() and repacking in the l_dev_t format. This 137 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's 138 * are not checked for, as for other fields. 139 * 140 * dev_to_ldev() is only used for translating st_dev. When we convert 141 * st_rdev for copying it out, it isn't really a dev_t, but has already 142 * been translated to an l_dev_t in a nontrivial way. Translating it 143 * again would be illogical but would have no effect since the low 16 144 * bits have the same encoding. 145 * 146 * The nontrivial translation for st_rdev renumbers some devices, but not 147 * ones that can be mounted on, so it is consistent with the translation 148 * for st_dev except when the renumbering or truncation causes conflicts. 149 */ 150 #define dev_to_ldev(d) ((uint16_t)(d)) 151 152 static int 153 newstat_copyout(struct stat *buf, void *ubuf) 154 { 155 struct l_newstat tbuf; 156 157 bzero(&tbuf, sizeof(tbuf)); 158 tbuf.st_dev = dev_to_ldev(buf->st_dev); 159 tbuf.st_ino = buf->st_ino; 160 tbuf.st_mode = buf->st_mode; 161 tbuf.st_nlink = buf->st_nlink; 162 tbuf.st_uid = buf->st_uid; 163 tbuf.st_gid = buf->st_gid; 164 tbuf.st_rdev = buf->st_rdev; 165 tbuf.st_size = buf->st_size; 166 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 167 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 168 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 169 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 170 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 171 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 172 tbuf.st_blksize = buf->st_blksize; 173 tbuf.st_blocks = buf->st_blocks; 174 175 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 176 } 177 178 #ifdef LINUX_LEGACY_SYSCALLS 179 int 180 linux_newstat(struct thread *td, struct linux_newstat_args *args) 181 { 182 struct stat buf; 183 char *path; 184 int error; 185 186 LCONVPATHEXIST(td, args->path, &path); 187 188 #ifdef DEBUG 189 if (ldebug(newstat)) 190 printf(ARGS(newstat, "%s, *"), path); 191 #endif 192 193 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 194 LFREEPATH(path); 195 if (error) 196 return (error); 197 return (newstat_copyout(&buf, args->buf)); 198 } 199 200 int 201 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 202 { 203 struct stat sb; 204 char *path; 205 int error; 206 207 LCONVPATHEXIST(td, args->path, &path); 208 209 #ifdef DEBUG 210 if (ldebug(newlstat)) 211 printf(ARGS(newlstat, "%s, *"), path); 212 #endif 213 214 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 215 LFREEPATH(path); 216 if (error) 217 return (error); 218 return (newstat_copyout(&sb, args->buf)); 219 } 220 #endif 221 222 int 223 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 224 { 225 struct stat buf; 226 int error; 227 228 #ifdef DEBUG 229 if (ldebug(newfstat)) 230 printf(ARGS(newfstat, "%d, *"), args->fd); 231 #endif 232 233 error = kern_fstat(td, args->fd, &buf); 234 translate_fd_major_minor(td, args->fd, &buf); 235 if (!error) 236 error = newstat_copyout(&buf, args->buf); 237 238 return (error); 239 } 240 241 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 242 static int 243 stat_copyout(struct stat *buf, void *ubuf) 244 { 245 struct l_stat lbuf; 246 247 bzero(&lbuf, sizeof(lbuf)); 248 lbuf.st_dev = dev_to_ldev(buf->st_dev); 249 lbuf.st_ino = buf->st_ino; 250 lbuf.st_mode = buf->st_mode; 251 lbuf.st_nlink = buf->st_nlink; 252 lbuf.st_uid = buf->st_uid; 253 lbuf.st_gid = buf->st_gid; 254 lbuf.st_rdev = buf->st_rdev; 255 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 256 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 257 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 258 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 259 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 260 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 261 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 262 lbuf.st_blksize = buf->st_blksize; 263 lbuf.st_blocks = buf->st_blocks; 264 lbuf.st_flags = buf->st_flags; 265 lbuf.st_gen = buf->st_gen; 266 267 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 268 } 269 270 int 271 linux_stat(struct thread *td, struct linux_stat_args *args) 272 { 273 struct stat buf; 274 char *path; 275 int error; 276 277 LCONVPATHEXIST(td, args->path, &path); 278 279 #ifdef DEBUG 280 if (ldebug(stat)) 281 printf(ARGS(stat, "%s, *"), path); 282 #endif 283 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 284 if (error) { 285 LFREEPATH(path); 286 return (error); 287 } 288 LFREEPATH(path); 289 return (stat_copyout(&buf, args->up)); 290 } 291 292 int 293 linux_lstat(struct thread *td, struct linux_lstat_args *args) 294 { 295 struct stat buf; 296 char *path; 297 int error; 298 299 LCONVPATHEXIST(td, args->path, &path); 300 301 #ifdef DEBUG 302 if (ldebug(lstat)) 303 printf(ARGS(lstat, "%s, *"), path); 304 #endif 305 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 306 if (error) { 307 LFREEPATH(path); 308 return (error); 309 } 310 LFREEPATH(path); 311 return (stat_copyout(&buf, args->up)); 312 } 313 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 314 315 struct l_statfs { 316 l_long f_type; 317 l_long f_bsize; 318 l_long f_blocks; 319 l_long f_bfree; 320 l_long f_bavail; 321 l_long f_files; 322 l_long f_ffree; 323 l_fsid_t f_fsid; 324 l_long f_namelen; 325 l_long f_frsize; 326 l_long f_flags; 327 l_long f_spare[4]; 328 }; 329 330 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 331 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 332 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 333 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 334 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 335 #define LINUX_NCP_SUPER_MAGIC 0x564cL 336 #define LINUX_NFS_SUPER_MAGIC 0x6969L 337 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 338 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 339 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 340 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 341 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 342 #define LINUX_SHMFS_MAGIC 0x01021994 343 344 static long 345 bsd_to_linux_ftype(const char *fstypename) 346 { 347 int i; 348 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 349 {"ufs", LINUX_UFS_SUPER_MAGIC}, 350 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 351 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 352 {"nfs", LINUX_NFS_SUPER_MAGIC}, 353 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 354 {"procfs", LINUX_PROC_SUPER_MAGIC}, 355 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 356 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 357 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 358 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 359 {"coda", LINUX_CODA_SUPER_MAGIC}, 360 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 361 {"tmpfs", LINUX_SHMFS_MAGIC}, 362 {NULL, 0L}}; 363 364 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 365 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 366 return (b2l_tbl[i].linux_type); 367 368 return (0L); 369 } 370 371 static int 372 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 373 { 374 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 375 uint64_t tmp; 376 377 #define LINUX_HIBITS 0xffffffff00000000ULL 378 379 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 380 bsd_statfs->f_bsize; 381 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 382 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 383 (tmp & LINUX_HIBITS)) 384 return (EOVERFLOW); 385 #undef LINUX_HIBITS 386 #endif 387 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 388 linux_statfs->f_bsize = bsd_statfs->f_bsize; 389 linux_statfs->f_blocks = bsd_statfs->f_blocks; 390 linux_statfs->f_bfree = bsd_statfs->f_bfree; 391 linux_statfs->f_bavail = bsd_statfs->f_bavail; 392 linux_statfs->f_ffree = bsd_statfs->f_ffree; 393 linux_statfs->f_files = bsd_statfs->f_files; 394 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 395 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 396 linux_statfs->f_namelen = MAXNAMLEN; 397 linux_statfs->f_frsize = bsd_statfs->f_bsize; 398 linux_statfs->f_flags = 0; 399 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 400 401 return (0); 402 } 403 404 int 405 linux_statfs(struct thread *td, struct linux_statfs_args *args) 406 { 407 struct l_statfs linux_statfs; 408 struct statfs *bsd_statfs; 409 char *path; 410 int error; 411 412 LCONVPATHEXIST(td, args->path, &path); 413 414 #ifdef DEBUG 415 if (ldebug(statfs)) 416 printf(ARGS(statfs, "%s, *"), path); 417 #endif 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 #ifdef DEBUG 463 if (ldebug(statfs64)) 464 printf(ARGS(statfs64, "%s, *"), path); 465 #endif 466 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 467 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 468 LFREEPATH(path); 469 if (error == 0) 470 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 471 free(bsd_statfs, M_STATFS); 472 if (error != 0) 473 return (error); 474 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 475 } 476 477 int 478 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 479 { 480 struct l_statfs64 linux_statfs; 481 struct statfs *bsd_statfs; 482 int error; 483 484 #ifdef DEBUG 485 if (ldebug(fstatfs64)) 486 printf(ARGS(fstatfs64, "%d, *"), args->fd); 487 #endif 488 if (args->bufsize != sizeof(struct l_statfs64)) 489 return (EINVAL); 490 491 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 492 error = kern_fstatfs(td, args->fd, bsd_statfs); 493 if (error == 0) 494 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 495 free(bsd_statfs, M_STATFS); 496 if (error != 0) 497 return (error); 498 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 499 } 500 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 501 502 int 503 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 504 { 505 struct l_statfs linux_statfs; 506 struct statfs *bsd_statfs; 507 int error; 508 509 #ifdef DEBUG 510 if (ldebug(fstatfs)) 511 printf(ARGS(fstatfs, "%d, *"), args->fd); 512 #endif 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 #ifdef DEBUG 536 if (ldebug(ustat)) 537 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 538 #endif 539 540 return (EOPNOTSUPP); 541 } 542 #endif 543 544 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 545 546 static int 547 stat64_copyout(struct stat *buf, void *ubuf) 548 { 549 struct l_stat64 lbuf; 550 551 bzero(&lbuf, sizeof(lbuf)); 552 lbuf.st_dev = dev_to_ldev(buf->st_dev); 553 lbuf.st_ino = buf->st_ino; 554 lbuf.st_mode = buf->st_mode; 555 lbuf.st_nlink = buf->st_nlink; 556 lbuf.st_uid = buf->st_uid; 557 lbuf.st_gid = buf->st_gid; 558 lbuf.st_rdev = buf->st_rdev; 559 lbuf.st_size = buf->st_size; 560 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 561 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 562 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 563 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 564 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 565 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 566 lbuf.st_blksize = buf->st_blksize; 567 lbuf.st_blocks = buf->st_blocks; 568 569 /* 570 * The __st_ino field makes all the difference. In the Linux kernel 571 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 572 * but without the assignment to __st_ino the runtime linker refuses 573 * to mmap(2) any shared libraries. I guess it's broken alright :-) 574 */ 575 lbuf.__st_ino = buf->st_ino; 576 577 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 578 } 579 580 int 581 linux_stat64(struct thread *td, struct linux_stat64_args *args) 582 { 583 struct stat buf; 584 char *filename; 585 int error; 586 587 LCONVPATHEXIST(td, args->filename, &filename); 588 589 #ifdef DEBUG 590 if (ldebug(stat64)) 591 printf(ARGS(stat64, "%s, *"), filename); 592 #endif 593 594 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 595 LFREEPATH(filename); 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 LCONVPATHEXIST(td, args->filename, &filename); 609 610 #ifdef DEBUG 611 if (ldebug(lstat64)) 612 printf(ARGS(lstat64, "%s, *"), args->filename); 613 #endif 614 615 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 616 LFREEPATH(filename); 617 if (error) 618 return (error); 619 return (stat64_copyout(&sb, args->statbuf)); 620 } 621 622 int 623 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 624 { 625 struct stat buf; 626 int error; 627 628 #ifdef DEBUG 629 if (ldebug(fstat64)) 630 printf(ARGS(fstat64, "%d, *"), args->fd); 631 #endif 632 633 error = kern_fstat(td, args->fd, &buf); 634 translate_fd_major_minor(td, args->fd, &buf); 635 if (!error) 636 error = stat64_copyout(&buf, args->statbuf); 637 638 return (error); 639 } 640 641 int 642 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 643 { 644 char *path; 645 int error, dfd, flag; 646 struct stat buf; 647 648 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 649 return (EINVAL); 650 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 651 AT_SYMLINK_NOFOLLOW : 0; 652 653 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 654 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 655 656 #ifdef DEBUG 657 if (ldebug(fstatat64)) 658 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 659 #endif 660 661 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 662 if (!error) 663 error = stat64_copyout(&buf, args->statbuf); 664 LFREEPATH(path); 665 666 return (error); 667 } 668 669 #else /* __amd64__ && !COMPAT_LINUX32 */ 670 671 int 672 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 673 { 674 char *path; 675 int error, dfd, flag; 676 struct stat buf; 677 678 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 679 return (EINVAL); 680 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 681 AT_SYMLINK_NOFOLLOW : 0; 682 683 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 684 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 685 686 #ifdef DEBUG 687 if (ldebug(newfstatat)) 688 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 689 #endif 690 691 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 692 if (error == 0) 693 error = newstat_copyout(&buf, args->statbuf); 694 LFREEPATH(path); 695 696 return (error); 697 } 698 699 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 700 701 int 702 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 703 { 704 struct mount *mp; 705 struct vnode *vp; 706 int error, save; 707 708 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 709 if (error != 0) 710 /* 711 * Linux syncfs() returns only EBADF, however fgetvp() 712 * can return EINVAL in case of file descriptor does 713 * not represent a vnode. XXX. 714 */ 715 return (error); 716 717 mp = vp->v_mount; 718 mtx_lock(&mountlist_mtx); 719 error = vfs_busy(mp, MBF_MNTLSTLOCK); 720 if (error != 0) { 721 /* See comment above. */ 722 mtx_unlock(&mountlist_mtx); 723 goto out; 724 } 725 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 726 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 727 save = curthread_pflags_set(TDP_SYNCIO); 728 vfs_msync(mp, MNT_NOWAIT); 729 VFS_SYNC(mp, MNT_NOWAIT); 730 curthread_pflags_restore(save); 731 vn_finished_write(mp); 732 } 733 vfs_unbusy(mp); 734 735 out: 736 vrele(vp); 737 return (error); 738 } 739