1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 "opt_ktrace.h" 30 31 #include <sys/param.h> 32 #include <sys/capsicum.h> 33 #include <sys/dirent.h> 34 #include <sys/lock.h> 35 #include <sys/malloc.h> 36 #include <sys/mutex.h> 37 #include <sys/namei.h> 38 #include <sys/proc.h> 39 #include <sys/stat.h> 40 #include <sys/syscallsubr.h> 41 #include <sys/tty.h> 42 #include <sys/vnode.h> 43 #ifdef KTRACE 44 #include <sys/ktrace.h> 45 #endif 46 47 #include <security/audit/audit.h> 48 49 #ifdef COMPAT_LINUX32 50 #include <machine/../linux32/linux.h> 51 #include <machine/../linux32/linux32_proto.h> 52 #else 53 #include <machine/../linux/linux.h> 54 #include <machine/../linux/linux_proto.h> 55 #endif 56 57 #include <compat/linux/linux.h> 58 #include <compat/linux/linux_file.h> 59 #include <compat/linux/linux_util.h> 60 61 62 static int 63 linux_kern_fstat(struct thread *td, int fd, struct stat *sbp) 64 { 65 struct vnode *vp; 66 struct file *fp; 67 int error; 68 69 AUDIT_ARG_FD(fd); 70 71 error = fget(td, fd, &cap_fstat_rights, &fp); 72 if (__predict_false(error != 0)) 73 return (error); 74 75 AUDIT_ARG_FILE(td->td_proc, fp); 76 77 error = fo_stat(fp, sbp, td->td_ucred); 78 if (error == 0 && (vp = fp->f_vnode) != NULL) 79 translate_vnhook_major_minor(vp, sbp); 80 fdrop(fp, td); 81 #ifdef KTRACE 82 if (KTRPOINT(td, KTR_STRUCT)) 83 ktrstat_error(sbp, error); 84 #endif 85 return (error); 86 } 87 88 static int 89 linux_kern_statat(struct thread *td, int flag, int fd, const char *path, 90 enum uio_seg pathseg, struct stat *sbp) 91 { 92 struct nameidata nd; 93 int error; 94 95 if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH | 96 AT_EMPTY_PATH)) != 0) 97 return (EINVAL); 98 99 NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_RESOLVE_BENEATH | 100 AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) | LOCKSHARED | LOCKLEAF | 101 AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights); 102 103 if ((error = namei(&nd)) != 0) { 104 if (error == ENOTDIR && 105 (nd.ni_resflags & NIRES_EMPTYPATH) != 0) 106 error = linux_kern_fstat(td, fd, sbp); 107 return (error); 108 } 109 error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED); 110 if (error == 0) 111 translate_vnhook_major_minor(nd.ni_vp, sbp); 112 NDFREE_PNBUF(&nd); 113 vput(nd.ni_vp); 114 #ifdef KTRACE 115 if (KTRPOINT(td, KTR_STRUCT)) 116 ktrstat_error(sbp, error); 117 #endif 118 return (error); 119 } 120 121 #ifdef LINUX_LEGACY_SYSCALLS 122 static int 123 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 124 struct stat *sbp) 125 { 126 127 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 128 } 129 130 static int 131 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 132 struct stat *sbp) 133 { 134 135 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 136 pathseg, sbp)); 137 } 138 #endif 139 140 static int 141 newstat_copyout(struct stat *buf, void *ubuf) 142 { 143 struct l_newstat tbuf; 144 145 bzero(&tbuf, sizeof(tbuf)); 146 tbuf.st_dev = linux_new_encode_dev(buf->st_dev); 147 tbuf.st_ino = buf->st_ino; 148 tbuf.st_mode = buf->st_mode; 149 tbuf.st_nlink = buf->st_nlink; 150 tbuf.st_uid = buf->st_uid; 151 tbuf.st_gid = buf->st_gid; 152 tbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 153 tbuf.st_size = buf->st_size; 154 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 155 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 156 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 157 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 158 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 159 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 160 tbuf.st_blksize = buf->st_blksize; 161 tbuf.st_blocks = buf->st_blocks; 162 163 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 164 } 165 166 167 #ifdef LINUX_LEGACY_SYSCALLS 168 int 169 linux_newstat(struct thread *td, struct linux_newstat_args *args) 170 { 171 struct stat buf; 172 int error; 173 174 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 175 if (error) 176 return (error); 177 return (newstat_copyout(&buf, args->buf)); 178 } 179 180 int 181 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 182 { 183 struct stat sb; 184 int error; 185 186 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 187 if (error) 188 return (error); 189 return (newstat_copyout(&sb, args->buf)); 190 } 191 #endif 192 193 int 194 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 195 { 196 struct stat buf; 197 int error; 198 199 error = linux_kern_fstat(td, args->fd, &buf); 200 if (!error) 201 error = newstat_copyout(&buf, args->buf); 202 203 return (error); 204 } 205 206 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 207 208 static __inline uint16_t 209 linux_old_encode_dev(dev_t _dev) 210 { 211 212 return (_dev == NODEV ? 0 : linux_encode_dev(major(_dev), minor(_dev))); 213 } 214 215 static int 216 old_stat_copyout(struct stat *buf, void *ubuf) 217 { 218 struct l_old_stat lbuf; 219 220 bzero(&lbuf, sizeof(lbuf)); 221 lbuf.st_dev = linux_old_encode_dev(buf->st_dev); 222 lbuf.st_ino = buf->st_ino; 223 lbuf.st_mode = buf->st_mode; 224 lbuf.st_nlink = buf->st_nlink; 225 lbuf.st_uid = buf->st_uid; 226 lbuf.st_gid = buf->st_gid; 227 lbuf.st_rdev = linux_old_encode_dev(buf->st_rdev); 228 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 229 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 230 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 231 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 232 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 233 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 234 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 235 lbuf.st_blksize = buf->st_blksize; 236 lbuf.st_blocks = buf->st_blocks; 237 lbuf.st_flags = buf->st_flags; 238 lbuf.st_gen = buf->st_gen; 239 240 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 241 } 242 243 int 244 linux_stat(struct thread *td, struct linux_stat_args *args) 245 { 246 struct stat buf; 247 int error; 248 249 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 250 if (error) { 251 return (error); 252 } 253 return (old_stat_copyout(&buf, args->up)); 254 } 255 256 int 257 linux_lstat(struct thread *td, struct linux_lstat_args *args) 258 { 259 struct stat buf; 260 int error; 261 262 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 263 if (error) { 264 return (error); 265 } 266 return (old_stat_copyout(&buf, args->up)); 267 } 268 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 269 270 struct l_statfs { 271 l_long f_type; 272 l_long f_bsize; 273 l_long f_blocks; 274 l_long f_bfree; 275 l_long f_bavail; 276 l_long f_files; 277 l_long f_ffree; 278 l_fsid_t f_fsid; 279 l_long f_namelen; 280 l_long f_frsize; 281 l_long f_flags; 282 l_long f_spare[4]; 283 }; 284 285 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 286 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 287 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 288 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 289 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 290 #define LINUX_NCP_SUPER_MAGIC 0x564cL 291 #define LINUX_NFS_SUPER_MAGIC 0x6969L 292 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 293 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 294 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 295 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 296 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 297 #define LINUX_SHMFS_MAGIC 0x01021994 298 #define LINUX_SYSFS_MAGIC 0x62656572 299 300 static long 301 bsd_to_linux_ftype(const char *fstypename) 302 { 303 int i; 304 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 305 {"ufs", LINUX_UFS_SUPER_MAGIC}, 306 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 307 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 308 {"nfs", LINUX_NFS_SUPER_MAGIC}, 309 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 310 {"procfs", LINUX_PROC_SUPER_MAGIC}, 311 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 312 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 313 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 314 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 315 {"coda", LINUX_CODA_SUPER_MAGIC}, 316 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 317 {"tmpfs", LINUX_SHMFS_MAGIC}, 318 {"linsysfs", LINUX_SYSFS_MAGIC}, 319 {NULL, 0L}}; 320 321 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 322 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 323 return (b2l_tbl[i].linux_type); 324 325 return (0L); 326 } 327 328 static int 329 bsd_to_linux_mnt_flags(int f_flags) 330 { 331 int flags = LINUX_ST_VALID; 332 333 if (f_flags & MNT_RDONLY) 334 flags |= LINUX_ST_RDONLY; 335 if (f_flags & MNT_NOEXEC) 336 flags |= LINUX_ST_NOEXEC; 337 if (f_flags & MNT_NOSUID) 338 flags |= LINUX_ST_NOSUID; 339 if (f_flags & MNT_NOATIME) 340 flags |= LINUX_ST_NOATIME; 341 if (f_flags & MNT_NOSYMFOLLOW) 342 flags |= LINUX_ST_NOSYMFOLLOW; 343 if (f_flags & MNT_SYNCHRONOUS) 344 flags |= LINUX_ST_SYNCHRONOUS; 345 346 return (flags); 347 } 348 349 static int 350 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 351 { 352 353 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 354 statfs_scale_blocks(bsd_statfs, INT32_MAX); 355 #endif 356 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 357 linux_statfs->f_bsize = bsd_statfs->f_bsize; 358 linux_statfs->f_blocks = bsd_statfs->f_blocks; 359 linux_statfs->f_bfree = bsd_statfs->f_bfree; 360 linux_statfs->f_bavail = bsd_statfs->f_bavail; 361 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 362 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 363 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 364 #else 365 linux_statfs->f_ffree = bsd_statfs->f_ffree; 366 linux_statfs->f_files = bsd_statfs->f_files; 367 #endif 368 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 369 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 370 linux_statfs->f_namelen = MAXNAMLEN; 371 linux_statfs->f_frsize = bsd_statfs->f_bsize; 372 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 373 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 374 375 return (0); 376 } 377 378 int 379 linux_statfs(struct thread *td, struct linux_statfs_args *args) 380 { 381 struct l_statfs linux_statfs; 382 struct statfs *bsd_statfs; 383 int error; 384 385 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 386 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 387 if (error == 0) 388 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 389 free(bsd_statfs, M_STATFS); 390 if (error != 0) 391 return (error); 392 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 393 } 394 395 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 396 static void 397 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 398 { 399 400 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 401 linux_statfs->f_bsize = bsd_statfs->f_bsize; 402 linux_statfs->f_blocks = bsd_statfs->f_blocks; 403 linux_statfs->f_bfree = bsd_statfs->f_bfree; 404 linux_statfs->f_bavail = bsd_statfs->f_bavail; 405 linux_statfs->f_ffree = bsd_statfs->f_ffree; 406 linux_statfs->f_files = bsd_statfs->f_files; 407 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 408 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 409 linux_statfs->f_namelen = MAXNAMLEN; 410 linux_statfs->f_frsize = bsd_statfs->f_bsize; 411 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 412 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 413 } 414 415 int 416 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 417 { 418 struct l_statfs64 linux_statfs; 419 struct statfs *bsd_statfs; 420 int error; 421 422 if (args->bufsize != sizeof(struct l_statfs64)) 423 return (EINVAL); 424 425 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 426 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 427 if (error == 0) 428 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 429 free(bsd_statfs, M_STATFS); 430 if (error != 0) 431 return (error); 432 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 433 } 434 435 int 436 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 437 { 438 struct l_statfs64 linux_statfs; 439 struct statfs *bsd_statfs; 440 int error; 441 442 if (args->bufsize != sizeof(struct l_statfs64)) 443 return (EINVAL); 444 445 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 446 error = kern_fstatfs(td, args->fd, bsd_statfs); 447 if (error == 0) 448 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 449 free(bsd_statfs, M_STATFS); 450 if (error != 0) 451 return (error); 452 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 453 } 454 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 455 456 int 457 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 458 { 459 struct l_statfs linux_statfs; 460 struct statfs *bsd_statfs; 461 int error; 462 463 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 464 error = kern_fstatfs(td, args->fd, bsd_statfs); 465 if (error == 0) 466 error = bsd_to_linux_statfs(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 struct l_ustat 474 { 475 l_daddr_t f_tfree; 476 l_ino_t f_tinode; 477 char f_fname[6]; 478 char f_fpack[6]; 479 }; 480 481 #ifdef LINUX_LEGACY_SYSCALLS 482 int 483 linux_ustat(struct thread *td, struct linux_ustat_args *args) 484 { 485 486 return (EOPNOTSUPP); 487 } 488 #endif 489 490 /* 491 * Convert Linux stat flags to BSD flags. Return value indicates successful 492 * conversion (no unknown flags). 493 */ 494 static bool 495 linux_to_bsd_stat_flags(int linux_flags, int *out_flags) 496 { 497 int flags, unsupported; 498 499 unsupported = linux_flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 500 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 501 if (unsupported != 0) { 502 *out_flags = unsupported; 503 return (false); 504 } 505 506 flags = 0; 507 if (linux_flags & LINUX_AT_SYMLINK_NOFOLLOW) 508 flags |= AT_SYMLINK_NOFOLLOW; 509 if (linux_flags & LINUX_AT_EMPTY_PATH) 510 flags |= AT_EMPTY_PATH; 511 *out_flags = flags; 512 return (true); 513 } 514 515 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 516 517 static int 518 stat64_copyout(struct stat *buf, void *ubuf) 519 { 520 struct l_stat64 lbuf; 521 522 bzero(&lbuf, sizeof(lbuf)); 523 lbuf.st_dev = linux_new_encode_dev(buf->st_dev); 524 lbuf.st_ino = buf->st_ino; 525 lbuf.st_mode = buf->st_mode; 526 lbuf.st_nlink = buf->st_nlink; 527 lbuf.st_uid = buf->st_uid; 528 lbuf.st_gid = buf->st_gid; 529 lbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 530 lbuf.st_size = buf->st_size; 531 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 532 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 533 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 534 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 535 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 536 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 537 lbuf.st_blksize = buf->st_blksize; 538 lbuf.st_blocks = buf->st_blocks; 539 540 /* 541 * The __st_ino field makes all the difference. In the Linux kernel 542 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 543 * but without the assignment to __st_ino the runtime linker refuses 544 * to mmap(2) any shared libraries. I guess it's broken alright :-) 545 */ 546 lbuf.__st_ino = buf->st_ino; 547 548 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 549 } 550 551 int 552 linux_stat64(struct thread *td, struct linux_stat64_args *args) 553 { 554 struct stat buf; 555 int error; 556 557 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 558 if (error) 559 return (error); 560 return (stat64_copyout(&buf, args->statbuf)); 561 } 562 563 int 564 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 565 { 566 struct stat sb; 567 int error; 568 569 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 570 if (error) 571 return (error); 572 return (stat64_copyout(&sb, args->statbuf)); 573 } 574 575 int 576 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 577 { 578 struct stat buf; 579 int error; 580 581 error = linux_kern_fstat(td, args->fd, &buf); 582 if (!error) 583 error = stat64_copyout(&buf, args->statbuf); 584 585 return (error); 586 } 587 588 int 589 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 590 { 591 int error, dfd, flags; 592 struct stat buf; 593 594 if (!linux_to_bsd_stat_flags(args->flag, &flags)) { 595 linux_msg(td, "fstatat64 unsupported flags 0x%x", flags); 596 return (EINVAL); 597 } 598 599 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 600 error = linux_kern_statat(td, flags, dfd, args->pathname, 601 UIO_USERSPACE, &buf); 602 if (error == 0) 603 error = stat64_copyout(&buf, args->statbuf); 604 605 return (error); 606 } 607 608 #else /* __amd64__ && !COMPAT_LINUX32 */ 609 610 int 611 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 612 { 613 int error, dfd, flags; 614 struct stat buf; 615 616 if (!linux_to_bsd_stat_flags(args->flag, &flags)) { 617 linux_msg(td, "fstatat unsupported flags 0x%x", flags); 618 return (EINVAL); 619 } 620 621 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 622 error = linux_kern_statat(td, flags, dfd, args->pathname, 623 UIO_USERSPACE, &buf); 624 if (error == 0) 625 error = newstat_copyout(&buf, args->statbuf); 626 627 return (error); 628 } 629 630 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 631 632 int 633 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 634 { 635 struct mount *mp; 636 struct vnode *vp; 637 int error, save; 638 639 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 640 if (error != 0) 641 /* 642 * Linux syncfs() returns only EBADF, however fgetvp() 643 * can return EINVAL in case of file descriptor does 644 * not represent a vnode. XXX. 645 */ 646 return (error); 647 648 mp = vp->v_mount; 649 mtx_lock(&mountlist_mtx); 650 error = vfs_busy(mp, MBF_MNTLSTLOCK); 651 if (error != 0) { 652 /* See comment above. */ 653 mtx_unlock(&mountlist_mtx); 654 goto out; 655 } 656 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 657 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 658 save = curthread_pflags_set(TDP_SYNCIO); 659 vfs_periodic(mp, MNT_NOWAIT); 660 VFS_SYNC(mp, MNT_NOWAIT); 661 curthread_pflags_restore(save); 662 vn_finished_write(mp); 663 } 664 vfs_unbusy(mp); 665 666 out: 667 vrele(vp); 668 return (error); 669 } 670 671 static int 672 statx_copyout(struct stat *buf, void *ubuf) 673 { 674 struct l_statx tbuf; 675 676 bzero(&tbuf, sizeof(tbuf)); 677 tbuf.stx_mask = STATX_ALL; 678 tbuf.stx_blksize = buf->st_blksize; 679 tbuf.stx_attributes = 0; 680 tbuf.stx_nlink = buf->st_nlink; 681 tbuf.stx_uid = buf->st_uid; 682 tbuf.stx_gid = buf->st_gid; 683 tbuf.stx_mode = buf->st_mode; 684 tbuf.stx_ino = buf->st_ino; 685 tbuf.stx_size = buf->st_size; 686 tbuf.stx_blocks = buf->st_blocks; 687 688 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 689 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 690 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 691 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 692 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 693 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 694 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 695 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 696 tbuf.stx_rdev_major = linux_encode_major(buf->st_rdev); 697 tbuf.stx_rdev_minor = linux_encode_minor(buf->st_rdev); 698 tbuf.stx_dev_major = linux_encode_major(buf->st_dev); 699 tbuf.stx_dev_minor = linux_encode_minor(buf->st_dev); 700 701 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 702 } 703 704 int 705 linux_statx(struct thread *td, struct linux_statx_args *args) 706 { 707 int error, dirfd, flags; 708 struct stat buf; 709 710 if (!linux_to_bsd_stat_flags(args->flags, &flags)) { 711 linux_msg(td, "statx unsupported flags 0x%x", flags); 712 return (EINVAL); 713 } 714 715 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 716 error = linux_kern_statat(td, flags, dirfd, args->pathname, 717 UIO_USERSPACE, &buf); 718 if (error == 0) 719 error = statx_copyout(&buf, args->statxbuf); 720 721 return (error); 722 } 723