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 <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_ktrace.h" 33 34 #include <sys/param.h> 35 #include <sys/capsicum.h> 36 #include <sys/dirent.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/namei.h> 41 #include <sys/proc.h> 42 #include <sys/stat.h> 43 #include <sys/syscallsubr.h> 44 #include <sys/tty.h> 45 #include <sys/vnode.h> 46 #ifdef KTRACE 47 #include <sys/ktrace.h> 48 #endif 49 50 #include <security/audit/audit.h> 51 52 #ifdef COMPAT_LINUX32 53 #include <machine/../linux32/linux.h> 54 #include <machine/../linux32/linux32_proto.h> 55 #else 56 #include <machine/../linux/linux.h> 57 #include <machine/../linux/linux_proto.h> 58 #endif 59 60 #include <compat/linux/linux.h> 61 #include <compat/linux/linux_file.h> 62 #include <compat/linux/linux_util.h> 63 64 65 static int 66 linux_kern_fstat(struct thread *td, int fd, struct stat *sbp) 67 { 68 struct vnode *vp; 69 struct file *fp; 70 int error; 71 72 AUDIT_ARG_FD(fd); 73 74 error = fget(td, fd, &cap_fstat_rights, &fp); 75 if (__predict_false(error != 0)) 76 return (error); 77 78 AUDIT_ARG_FILE(td->td_proc, fp); 79 80 error = fo_stat(fp, sbp, td->td_ucred); 81 if (error == 0 && (vp = fp->f_vnode) != NULL) 82 translate_vnhook_major_minor(vp, sbp); 83 fdrop(fp, td); 84 #ifdef KTRACE 85 if (KTRPOINT(td, KTR_STRUCT)) 86 ktrstat_error(sbp, error); 87 #endif 88 return (error); 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 struct nameidata nd; 96 int error; 97 98 if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH | 99 AT_EMPTY_PATH)) != 0) 100 return (EINVAL); 101 102 NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_RESOLVE_BENEATH | 103 AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) | LOCKSHARED | LOCKLEAF | 104 AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights); 105 106 if ((error = namei(&nd)) != 0) { 107 if (error == ENOTDIR && 108 (nd.ni_resflags & NIRES_EMPTYPATH) != 0) 109 error = linux_kern_fstat(td, fd, sbp); 110 return (error); 111 } 112 error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED); 113 if (error == 0) 114 translate_vnhook_major_minor(nd.ni_vp, sbp); 115 NDFREE_PNBUF(&nd); 116 vput(nd.ni_vp); 117 #ifdef KTRACE 118 if (KTRPOINT(td, KTR_STRUCT)) 119 ktrstat_error(sbp, error); 120 #endif 121 return (error); 122 } 123 124 #ifdef LINUX_LEGACY_SYSCALLS 125 static int 126 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 127 struct stat *sbp) 128 { 129 130 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 131 } 132 133 static int 134 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 135 struct stat *sbp) 136 { 137 138 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 139 pathseg, sbp)); 140 } 141 #endif 142 143 static int 144 newstat_copyout(struct stat *buf, void *ubuf) 145 { 146 struct l_newstat tbuf; 147 148 bzero(&tbuf, sizeof(tbuf)); 149 tbuf.st_dev = linux_new_encode_dev(buf->st_dev); 150 tbuf.st_ino = buf->st_ino; 151 tbuf.st_mode = buf->st_mode; 152 tbuf.st_nlink = buf->st_nlink; 153 tbuf.st_uid = buf->st_uid; 154 tbuf.st_gid = buf->st_gid; 155 tbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 156 tbuf.st_size = buf->st_size; 157 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 158 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 159 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 160 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 161 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 162 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 163 tbuf.st_blksize = buf->st_blksize; 164 tbuf.st_blocks = buf->st_blocks; 165 166 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 167 } 168 169 170 #ifdef LINUX_LEGACY_SYSCALLS 171 int 172 linux_newstat(struct thread *td, struct linux_newstat_args *args) 173 { 174 struct stat buf; 175 int error; 176 177 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 178 if (error) 179 return (error); 180 return (newstat_copyout(&buf, args->buf)); 181 } 182 183 int 184 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 185 { 186 struct stat sb; 187 int error; 188 189 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 190 if (error) 191 return (error); 192 return (newstat_copyout(&sb, args->buf)); 193 } 194 #endif 195 196 int 197 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 198 { 199 struct stat buf; 200 int error; 201 202 error = linux_kern_fstat(td, args->fd, &buf); 203 if (!error) 204 error = newstat_copyout(&buf, args->buf); 205 206 return (error); 207 } 208 209 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 210 211 static __inline uint16_t 212 linux_old_encode_dev(dev_t _dev) 213 { 214 215 return (_dev == NODEV ? 0 : linux_encode_dev(major(_dev), minor(_dev))); 216 } 217 218 static int 219 old_stat_copyout(struct stat *buf, void *ubuf) 220 { 221 struct l_old_stat lbuf; 222 223 bzero(&lbuf, sizeof(lbuf)); 224 lbuf.st_dev = linux_old_encode_dev(buf->st_dev); 225 lbuf.st_ino = buf->st_ino; 226 lbuf.st_mode = buf->st_mode; 227 lbuf.st_nlink = buf->st_nlink; 228 lbuf.st_uid = buf->st_uid; 229 lbuf.st_gid = buf->st_gid; 230 lbuf.st_rdev = linux_old_encode_dev(buf->st_rdev); 231 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 232 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 233 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 234 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 235 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 236 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 237 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 238 lbuf.st_blksize = buf->st_blksize; 239 lbuf.st_blocks = buf->st_blocks; 240 lbuf.st_flags = buf->st_flags; 241 lbuf.st_gen = buf->st_gen; 242 243 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 244 } 245 246 int 247 linux_stat(struct thread *td, struct linux_stat_args *args) 248 { 249 struct stat buf; 250 int error; 251 252 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 253 if (error) { 254 return (error); 255 } 256 return (old_stat_copyout(&buf, args->up)); 257 } 258 259 int 260 linux_lstat(struct thread *td, struct linux_lstat_args *args) 261 { 262 struct stat buf; 263 int error; 264 265 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 266 if (error) { 267 return (error); 268 } 269 return (old_stat_copyout(&buf, args->up)); 270 } 271 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 272 273 struct l_statfs { 274 l_long f_type; 275 l_long f_bsize; 276 l_long f_blocks; 277 l_long f_bfree; 278 l_long f_bavail; 279 l_long f_files; 280 l_long f_ffree; 281 l_fsid_t f_fsid; 282 l_long f_namelen; 283 l_long f_frsize; 284 l_long f_flags; 285 l_long f_spare[4]; 286 }; 287 288 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 289 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 290 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 291 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 292 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 293 #define LINUX_NCP_SUPER_MAGIC 0x564cL 294 #define LINUX_NFS_SUPER_MAGIC 0x6969L 295 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 296 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 297 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 298 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 299 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 300 #define LINUX_SHMFS_MAGIC 0x01021994 301 302 static long 303 bsd_to_linux_ftype(const char *fstypename) 304 { 305 int i; 306 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 307 {"ufs", LINUX_UFS_SUPER_MAGIC}, 308 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 309 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 310 {"nfs", LINUX_NFS_SUPER_MAGIC}, 311 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 312 {"procfs", LINUX_PROC_SUPER_MAGIC}, 313 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 314 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 315 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 316 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 317 {"coda", LINUX_CODA_SUPER_MAGIC}, 318 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 319 {"tmpfs", LINUX_SHMFS_MAGIC}, 320 {NULL, 0L}}; 321 322 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 323 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 324 return (b2l_tbl[i].linux_type); 325 326 return (0L); 327 } 328 329 static int 330 bsd_to_linux_mnt_flags(int f_flags) 331 { 332 int flags = LINUX_ST_VALID; 333 334 if (f_flags & MNT_RDONLY) 335 flags |= LINUX_ST_RDONLY; 336 if (f_flags & MNT_NOEXEC) 337 flags |= LINUX_ST_NOEXEC; 338 if (f_flags & MNT_NOSUID) 339 flags |= LINUX_ST_NOSUID; 340 if (f_flags & MNT_NOATIME) 341 flags |= LINUX_ST_NOATIME; 342 if (f_flags & MNT_NOSYMFOLLOW) 343 flags |= LINUX_ST_NOSYMFOLLOW; 344 if (f_flags & MNT_SYNCHRONOUS) 345 flags |= LINUX_ST_SYNCHRONOUS; 346 347 return (flags); 348 } 349 350 static int 351 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 352 { 353 354 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 355 statfs_scale_blocks(bsd_statfs, INT32_MAX); 356 #endif 357 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 358 linux_statfs->f_bsize = bsd_statfs->f_bsize; 359 linux_statfs->f_blocks = bsd_statfs->f_blocks; 360 linux_statfs->f_bfree = bsd_statfs->f_bfree; 361 linux_statfs->f_bavail = bsd_statfs->f_bavail; 362 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 363 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 364 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 365 #else 366 linux_statfs->f_ffree = bsd_statfs->f_ffree; 367 linux_statfs->f_files = bsd_statfs->f_files; 368 #endif 369 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 370 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 371 linux_statfs->f_namelen = MAXNAMLEN; 372 linux_statfs->f_frsize = bsd_statfs->f_bsize; 373 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 374 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 375 376 return (0); 377 } 378 379 int 380 linux_statfs(struct thread *td, struct linux_statfs_args *args) 381 { 382 struct l_statfs linux_statfs; 383 struct statfs *bsd_statfs; 384 int error; 385 386 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 387 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 388 if (error == 0) 389 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 390 free(bsd_statfs, M_STATFS); 391 if (error != 0) 392 return (error); 393 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 394 } 395 396 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 397 static void 398 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 399 { 400 401 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 = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 413 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 414 } 415 416 int 417 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 418 { 419 struct l_statfs64 linux_statfs; 420 struct statfs *bsd_statfs; 421 int error; 422 423 if (args->bufsize != sizeof(struct l_statfs64)) 424 return (EINVAL); 425 426 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 427 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 428 if (error == 0) 429 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 430 free(bsd_statfs, M_STATFS); 431 if (error != 0) 432 return (error); 433 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 434 } 435 436 int 437 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 438 { 439 struct l_statfs64 linux_statfs; 440 struct statfs *bsd_statfs; 441 int error; 442 443 if (args->bufsize != sizeof(struct l_statfs64)) 444 return (EINVAL); 445 446 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 447 error = kern_fstatfs(td, args->fd, bsd_statfs); 448 if (error == 0) 449 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 450 free(bsd_statfs, M_STATFS); 451 if (error != 0) 452 return (error); 453 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 454 } 455 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 456 457 int 458 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 459 { 460 struct l_statfs linux_statfs; 461 struct statfs *bsd_statfs; 462 int error; 463 464 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 465 error = kern_fstatfs(td, args->fd, bsd_statfs); 466 if (error == 0) 467 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 468 free(bsd_statfs, M_STATFS); 469 if (error != 0) 470 return (error); 471 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 472 } 473 474 struct l_ustat 475 { 476 l_daddr_t f_tfree; 477 l_ino_t f_tinode; 478 char f_fname[6]; 479 char f_fpack[6]; 480 }; 481 482 #ifdef LINUX_LEGACY_SYSCALLS 483 int 484 linux_ustat(struct thread *td, struct linux_ustat_args *args) 485 { 486 487 return (EOPNOTSUPP); 488 } 489 #endif 490 491 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 492 493 static int 494 stat64_copyout(struct stat *buf, void *ubuf) 495 { 496 struct l_stat64 lbuf; 497 498 bzero(&lbuf, sizeof(lbuf)); 499 lbuf.st_dev = linux_new_encode_dev(buf->st_dev); 500 lbuf.st_ino = buf->st_ino; 501 lbuf.st_mode = buf->st_mode; 502 lbuf.st_nlink = buf->st_nlink; 503 lbuf.st_uid = buf->st_uid; 504 lbuf.st_gid = buf->st_gid; 505 lbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 506 lbuf.st_size = buf->st_size; 507 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 508 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 509 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 510 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 511 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 512 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 513 lbuf.st_blksize = buf->st_blksize; 514 lbuf.st_blocks = buf->st_blocks; 515 516 /* 517 * The __st_ino field makes all the difference. In the Linux kernel 518 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 519 * but without the assignment to __st_ino the runtime linker refuses 520 * to mmap(2) any shared libraries. I guess it's broken alright :-) 521 */ 522 lbuf.__st_ino = buf->st_ino; 523 524 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 525 } 526 527 int 528 linux_stat64(struct thread *td, struct linux_stat64_args *args) 529 { 530 struct stat buf; 531 int error; 532 533 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 534 if (error) 535 return (error); 536 return (stat64_copyout(&buf, args->statbuf)); 537 } 538 539 int 540 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 541 { 542 struct stat sb; 543 int error; 544 545 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 546 if (error) 547 return (error); 548 return (stat64_copyout(&sb, args->statbuf)); 549 } 550 551 int 552 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 553 { 554 struct stat buf; 555 int error; 556 557 error = linux_kern_fstat(td, args->fd, &buf); 558 if (!error) 559 error = stat64_copyout(&buf, args->statbuf); 560 561 return (error); 562 } 563 564 int 565 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 566 { 567 int error, dfd, flag, unsupported; 568 struct stat buf; 569 570 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 571 if (unsupported != 0) { 572 linux_msg(td, "fstatat64 unsupported flag 0x%x", unsupported); 573 return (EINVAL); 574 } 575 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 576 AT_SYMLINK_NOFOLLOW : 0; 577 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 578 AT_EMPTY_PATH : 0; 579 580 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 581 error = linux_kern_statat(td, flag, dfd, args->pathname, 582 UIO_USERSPACE, &buf); 583 if (error == 0) 584 error = stat64_copyout(&buf, args->statbuf); 585 586 return (error); 587 } 588 589 #else /* __amd64__ && !COMPAT_LINUX32 */ 590 591 int 592 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 593 { 594 int error, dfd, flag, unsupported; 595 struct stat buf; 596 597 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 598 if (unsupported != 0) { 599 linux_msg(td, "fstatat unsupported flag 0x%x", unsupported); 600 return (EINVAL); 601 } 602 603 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 604 AT_SYMLINK_NOFOLLOW : 0; 605 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 606 AT_EMPTY_PATH : 0; 607 608 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 609 error = linux_kern_statat(td, flag, dfd, args->pathname, 610 UIO_USERSPACE, &buf); 611 if (error == 0) 612 error = newstat_copyout(&buf, args->statbuf); 613 614 return (error); 615 } 616 617 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 618 619 int 620 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 621 { 622 struct mount *mp; 623 struct vnode *vp; 624 int error, save; 625 626 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 627 if (error != 0) 628 /* 629 * Linux syncfs() returns only EBADF, however fgetvp() 630 * can return EINVAL in case of file descriptor does 631 * not represent a vnode. XXX. 632 */ 633 return (error); 634 635 mp = vp->v_mount; 636 mtx_lock(&mountlist_mtx); 637 error = vfs_busy(mp, MBF_MNTLSTLOCK); 638 if (error != 0) { 639 /* See comment above. */ 640 mtx_unlock(&mountlist_mtx); 641 goto out; 642 } 643 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 644 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 645 save = curthread_pflags_set(TDP_SYNCIO); 646 vfs_periodic(mp, MNT_NOWAIT); 647 VFS_SYNC(mp, MNT_NOWAIT); 648 curthread_pflags_restore(save); 649 vn_finished_write(mp); 650 } 651 vfs_unbusy(mp); 652 653 out: 654 vrele(vp); 655 return (error); 656 } 657 658 static int 659 statx_copyout(struct stat *buf, void *ubuf) 660 { 661 struct l_statx tbuf; 662 663 bzero(&tbuf, sizeof(tbuf)); 664 tbuf.stx_mask = STATX_ALL; 665 tbuf.stx_blksize = buf->st_blksize; 666 tbuf.stx_attributes = 0; 667 tbuf.stx_nlink = buf->st_nlink; 668 tbuf.stx_uid = buf->st_uid; 669 tbuf.stx_gid = buf->st_gid; 670 tbuf.stx_mode = buf->st_mode; 671 tbuf.stx_ino = buf->st_ino; 672 tbuf.stx_size = buf->st_size; 673 tbuf.stx_blocks = buf->st_blocks; 674 675 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 676 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 677 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 678 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 679 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 680 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 681 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 682 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 683 tbuf.stx_rdev_major = linux_encode_major(buf->st_rdev); 684 tbuf.stx_rdev_minor = linux_encode_minor(buf->st_rdev); 685 tbuf.stx_dev_major = linux_encode_major(buf->st_dev); 686 tbuf.stx_dev_minor = linux_encode_minor(buf->st_dev); 687 688 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 689 } 690 691 int 692 linux_statx(struct thread *td, struct linux_statx_args *args) 693 { 694 int error, dirfd, flags, unsupported; 695 struct stat buf; 696 697 unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 698 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 699 if (unsupported != 0) { 700 linux_msg(td, "statx unsupported flags 0x%x", unsupported); 701 return (EINVAL); 702 } 703 704 flags = (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) ? 705 AT_SYMLINK_NOFOLLOW : 0; 706 flags |= (args->flags & LINUX_AT_EMPTY_PATH) ? 707 AT_EMPTY_PATH : 0; 708 709 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 710 error = linux_kern_statat(td, flags, dirfd, args->pathname, 711 UIO_USERSPACE, &buf); 712 if (error == 0) 713 error = statx_copyout(&buf, args->statxbuf); 714 715 return (error); 716 } 717