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 298 299 static long 300 bsd_to_linux_ftype(const char *fstypename) 301 { 302 int i; 303 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 304 {"ufs", LINUX_UFS_SUPER_MAGIC}, 305 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 306 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 307 {"nfs", LINUX_NFS_SUPER_MAGIC}, 308 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 309 {"procfs", LINUX_PROC_SUPER_MAGIC}, 310 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 311 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 312 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 313 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 314 {"coda", LINUX_CODA_SUPER_MAGIC}, 315 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 316 {"tmpfs", LINUX_SHMFS_MAGIC}, 317 {NULL, 0L}}; 318 319 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 320 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 321 return (b2l_tbl[i].linux_type); 322 323 return (0L); 324 } 325 326 static int 327 bsd_to_linux_mnt_flags(int f_flags) 328 { 329 int flags = LINUX_ST_VALID; 330 331 if (f_flags & MNT_RDONLY) 332 flags |= LINUX_ST_RDONLY; 333 if (f_flags & MNT_NOEXEC) 334 flags |= LINUX_ST_NOEXEC; 335 if (f_flags & MNT_NOSUID) 336 flags |= LINUX_ST_NOSUID; 337 if (f_flags & MNT_NOATIME) 338 flags |= LINUX_ST_NOATIME; 339 if (f_flags & MNT_NOSYMFOLLOW) 340 flags |= LINUX_ST_NOSYMFOLLOW; 341 if (f_flags & MNT_SYNCHRONOUS) 342 flags |= LINUX_ST_SYNCHRONOUS; 343 344 return (flags); 345 } 346 347 static int 348 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 349 { 350 351 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 352 statfs_scale_blocks(bsd_statfs, INT32_MAX); 353 #endif 354 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 355 linux_statfs->f_bsize = bsd_statfs->f_bsize; 356 linux_statfs->f_blocks = bsd_statfs->f_blocks; 357 linux_statfs->f_bfree = bsd_statfs->f_bfree; 358 linux_statfs->f_bavail = bsd_statfs->f_bavail; 359 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 360 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 361 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 362 #else 363 linux_statfs->f_ffree = bsd_statfs->f_ffree; 364 linux_statfs->f_files = bsd_statfs->f_files; 365 #endif 366 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 367 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 368 linux_statfs->f_namelen = MAXNAMLEN; 369 linux_statfs->f_frsize = bsd_statfs->f_bsize; 370 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 371 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 372 373 return (0); 374 } 375 376 int 377 linux_statfs(struct thread *td, struct linux_statfs_args *args) 378 { 379 struct l_statfs linux_statfs; 380 struct statfs *bsd_statfs; 381 int error; 382 383 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 384 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 385 if (error == 0) 386 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 387 free(bsd_statfs, M_STATFS); 388 if (error != 0) 389 return (error); 390 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 391 } 392 393 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 394 static void 395 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 396 { 397 398 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 399 linux_statfs->f_bsize = bsd_statfs->f_bsize; 400 linux_statfs->f_blocks = bsd_statfs->f_blocks; 401 linux_statfs->f_bfree = bsd_statfs->f_bfree; 402 linux_statfs->f_bavail = bsd_statfs->f_bavail; 403 linux_statfs->f_ffree = bsd_statfs->f_ffree; 404 linux_statfs->f_files = bsd_statfs->f_files; 405 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 406 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 407 linux_statfs->f_namelen = MAXNAMLEN; 408 linux_statfs->f_frsize = bsd_statfs->f_bsize; 409 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 410 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 411 } 412 413 int 414 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 415 { 416 struct l_statfs64 linux_statfs; 417 struct statfs *bsd_statfs; 418 int error; 419 420 if (args->bufsize != sizeof(struct l_statfs64)) 421 return (EINVAL); 422 423 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 424 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 425 if (error == 0) 426 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 427 free(bsd_statfs, M_STATFS); 428 if (error != 0) 429 return (error); 430 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 431 } 432 433 int 434 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 435 { 436 struct l_statfs64 linux_statfs; 437 struct statfs *bsd_statfs; 438 int error; 439 440 if (args->bufsize != sizeof(struct l_statfs64)) 441 return (EINVAL); 442 443 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 444 error = kern_fstatfs(td, args->fd, bsd_statfs); 445 if (error == 0) 446 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 447 free(bsd_statfs, M_STATFS); 448 if (error != 0) 449 return (error); 450 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 451 } 452 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 453 454 int 455 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 456 { 457 struct l_statfs linux_statfs; 458 struct statfs *bsd_statfs; 459 int error; 460 461 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 462 error = kern_fstatfs(td, args->fd, bsd_statfs); 463 if (error == 0) 464 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 465 free(bsd_statfs, M_STATFS); 466 if (error != 0) 467 return (error); 468 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 469 } 470 471 struct l_ustat 472 { 473 l_daddr_t f_tfree; 474 l_ino_t f_tinode; 475 char f_fname[6]; 476 char f_fpack[6]; 477 }; 478 479 #ifdef LINUX_LEGACY_SYSCALLS 480 int 481 linux_ustat(struct thread *td, struct linux_ustat_args *args) 482 { 483 484 return (EOPNOTSUPP); 485 } 486 #endif 487 488 /* 489 * Convert Linux stat flags to BSD flags. Return value indicates successful 490 * conversion (no unknown flags). 491 */ 492 static bool 493 linux_to_bsd_stat_flags(int linux_flags, int *out_flags) 494 { 495 int flags, unsupported; 496 497 unsupported = linux_flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 498 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 499 if (unsupported != 0) { 500 *out_flags = unsupported; 501 return (false); 502 } 503 504 flags = 0; 505 if (linux_flags & LINUX_AT_SYMLINK_NOFOLLOW) 506 flags |= AT_SYMLINK_NOFOLLOW; 507 if (linux_flags & LINUX_AT_EMPTY_PATH) 508 flags |= AT_EMPTY_PATH; 509 *out_flags = flags; 510 return (true); 511 } 512 513 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 514 515 static int 516 stat64_copyout(struct stat *buf, void *ubuf) 517 { 518 struct l_stat64 lbuf; 519 520 bzero(&lbuf, sizeof(lbuf)); 521 lbuf.st_dev = linux_new_encode_dev(buf->st_dev); 522 lbuf.st_ino = buf->st_ino; 523 lbuf.st_mode = buf->st_mode; 524 lbuf.st_nlink = buf->st_nlink; 525 lbuf.st_uid = buf->st_uid; 526 lbuf.st_gid = buf->st_gid; 527 lbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 528 lbuf.st_size = buf->st_size; 529 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 530 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 531 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 532 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 533 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 534 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 535 lbuf.st_blksize = buf->st_blksize; 536 lbuf.st_blocks = buf->st_blocks; 537 538 /* 539 * The __st_ino field makes all the difference. In the Linux kernel 540 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 541 * but without the assignment to __st_ino the runtime linker refuses 542 * to mmap(2) any shared libraries. I guess it's broken alright :-) 543 */ 544 lbuf.__st_ino = buf->st_ino; 545 546 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 547 } 548 549 int 550 linux_stat64(struct thread *td, struct linux_stat64_args *args) 551 { 552 struct stat buf; 553 int error; 554 555 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 556 if (error) 557 return (error); 558 return (stat64_copyout(&buf, args->statbuf)); 559 } 560 561 int 562 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 563 { 564 struct stat sb; 565 int error; 566 567 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 568 if (error) 569 return (error); 570 return (stat64_copyout(&sb, args->statbuf)); 571 } 572 573 int 574 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 575 { 576 struct stat buf; 577 int error; 578 579 error = linux_kern_fstat(td, args->fd, &buf); 580 if (!error) 581 error = stat64_copyout(&buf, args->statbuf); 582 583 return (error); 584 } 585 586 int 587 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 588 { 589 int error, dfd, flags; 590 struct stat buf; 591 592 if (!linux_to_bsd_stat_flags(args->flag, &flags)) { 593 linux_msg(td, "fstatat64 unsupported flags 0x%x", flags); 594 return (EINVAL); 595 } 596 597 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 598 error = linux_kern_statat(td, flags, dfd, args->pathname, 599 UIO_USERSPACE, &buf); 600 if (error == 0) 601 error = stat64_copyout(&buf, args->statbuf); 602 603 return (error); 604 } 605 606 #else /* __amd64__ && !COMPAT_LINUX32 */ 607 608 int 609 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 610 { 611 int error, dfd, flags; 612 struct stat buf; 613 614 if (!linux_to_bsd_stat_flags(args->flag, &flags)) { 615 linux_msg(td, "fstatat unsupported flags 0x%x", flags); 616 return (EINVAL); 617 } 618 619 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 620 error = linux_kern_statat(td, flags, dfd, args->pathname, 621 UIO_USERSPACE, &buf); 622 if (error == 0) 623 error = newstat_copyout(&buf, args->statbuf); 624 625 return (error); 626 } 627 628 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 629 630 int 631 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 632 { 633 struct mount *mp; 634 struct vnode *vp; 635 int error, save; 636 637 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 638 if (error != 0) 639 /* 640 * Linux syncfs() returns only EBADF, however fgetvp() 641 * can return EINVAL in case of file descriptor does 642 * not represent a vnode. XXX. 643 */ 644 return (error); 645 646 mp = vp->v_mount; 647 mtx_lock(&mountlist_mtx); 648 error = vfs_busy(mp, MBF_MNTLSTLOCK); 649 if (error != 0) { 650 /* See comment above. */ 651 mtx_unlock(&mountlist_mtx); 652 goto out; 653 } 654 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 655 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 656 save = curthread_pflags_set(TDP_SYNCIO); 657 vfs_periodic(mp, MNT_NOWAIT); 658 VFS_SYNC(mp, MNT_NOWAIT); 659 curthread_pflags_restore(save); 660 vn_finished_write(mp); 661 } 662 vfs_unbusy(mp); 663 664 out: 665 vrele(vp); 666 return (error); 667 } 668 669 static int 670 statx_copyout(struct stat *buf, void *ubuf) 671 { 672 struct l_statx tbuf; 673 674 bzero(&tbuf, sizeof(tbuf)); 675 tbuf.stx_mask = STATX_ALL; 676 tbuf.stx_blksize = buf->st_blksize; 677 tbuf.stx_attributes = 0; 678 tbuf.stx_nlink = buf->st_nlink; 679 tbuf.stx_uid = buf->st_uid; 680 tbuf.stx_gid = buf->st_gid; 681 tbuf.stx_mode = buf->st_mode; 682 tbuf.stx_ino = buf->st_ino; 683 tbuf.stx_size = buf->st_size; 684 tbuf.stx_blocks = buf->st_blocks; 685 686 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 687 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 688 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 689 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 690 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 691 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 692 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 693 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 694 tbuf.stx_rdev_major = linux_encode_major(buf->st_rdev); 695 tbuf.stx_rdev_minor = linux_encode_minor(buf->st_rdev); 696 tbuf.stx_dev_major = linux_encode_major(buf->st_dev); 697 tbuf.stx_dev_minor = linux_encode_minor(buf->st_dev); 698 699 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 700 } 701 702 int 703 linux_statx(struct thread *td, struct linux_statx_args *args) 704 { 705 int error, dirfd, flags; 706 struct stat buf; 707 708 if (!linux_to_bsd_stat_flags(args->flags, &flags)) { 709 linux_msg(td, "statx unsupported flags 0x%x", flags); 710 return (EINVAL); 711 } 712 713 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 714 error = linux_kern_statat(td, flags, dirfd, args->pathname, 715 UIO_USERSPACE, &buf); 716 if (error == 0) 717 error = statx_copyout(&buf, args->statxbuf); 718 719 return (error); 720 } 721