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 #include "opt_ktrace.h" 31 32 #include <sys/param.h> 33 #include <sys/capsicum.h> 34 #include <sys/dirent.h> 35 #include <sys/lock.h> 36 #include <sys/malloc.h> 37 #include <sys/mutex.h> 38 #include <sys/namei.h> 39 #include <sys/proc.h> 40 #include <sys/stat.h> 41 #include <sys/syscallsubr.h> 42 #include <sys/tty.h> 43 #include <sys/vnode.h> 44 #ifdef KTRACE 45 #include <sys/ktrace.h> 46 #endif 47 48 #include <security/audit/audit.h> 49 50 #ifdef COMPAT_LINUX32 51 #include <machine/../linux32/linux.h> 52 #include <machine/../linux32/linux32_proto.h> 53 #else 54 #include <machine/../linux/linux.h> 55 #include <machine/../linux/linux_proto.h> 56 #endif 57 58 #include <compat/linux/linux.h> 59 #include <compat/linux/linux_file.h> 60 #include <compat/linux/linux_util.h> 61 62 63 static int 64 linux_kern_fstat(struct thread *td, int fd, struct stat *sbp) 65 { 66 struct vnode *vp; 67 struct file *fp; 68 int error; 69 70 AUDIT_ARG_FD(fd); 71 72 error = fget(td, fd, &cap_fstat_rights, &fp); 73 if (__predict_false(error != 0)) 74 return (error); 75 76 AUDIT_ARG_FILE(td->td_proc, fp); 77 78 error = fo_stat(fp, sbp, td->td_ucred); 79 if (error == 0 && (vp = fp->f_vnode) != NULL) 80 translate_vnhook_major_minor(vp, sbp); 81 fdrop(fp, td); 82 #ifdef KTRACE 83 if (KTRPOINT(td, KTR_STRUCT)) 84 ktrstat_error(sbp, error); 85 #endif 86 return (error); 87 } 88 89 static int 90 linux_kern_statat(struct thread *td, int flag, int fd, const char *path, 91 enum uio_seg pathseg, struct stat *sbp) 92 { 93 struct nameidata nd; 94 int error; 95 96 if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH | 97 AT_EMPTY_PATH)) != 0) 98 return (EINVAL); 99 100 NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_RESOLVE_BENEATH | 101 AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) | LOCKSHARED | LOCKLEAF | 102 AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights); 103 104 if ((error = namei(&nd)) != 0) { 105 if (error == ENOTDIR && 106 (nd.ni_resflags & NIRES_EMPTYPATH) != 0) 107 error = linux_kern_fstat(td, fd, sbp); 108 return (error); 109 } 110 error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED); 111 if (error == 0) 112 translate_vnhook_major_minor(nd.ni_vp, sbp); 113 NDFREE_PNBUF(&nd); 114 vput(nd.ni_vp); 115 #ifdef KTRACE 116 if (KTRPOINT(td, KTR_STRUCT)) 117 ktrstat_error(sbp, error); 118 #endif 119 return (error); 120 } 121 122 #ifdef LINUX_LEGACY_SYSCALLS 123 static int 124 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 125 struct stat *sbp) 126 { 127 128 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 129 } 130 131 static int 132 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 133 struct stat *sbp) 134 { 135 136 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 137 pathseg, sbp)); 138 } 139 #endif 140 141 static int 142 newstat_copyout(struct stat *buf, void *ubuf) 143 { 144 struct l_newstat tbuf; 145 146 bzero(&tbuf, sizeof(tbuf)); 147 tbuf.st_dev = linux_new_encode_dev(buf->st_dev); 148 tbuf.st_ino = buf->st_ino; 149 tbuf.st_mode = buf->st_mode; 150 tbuf.st_nlink = buf->st_nlink; 151 tbuf.st_uid = buf->st_uid; 152 tbuf.st_gid = buf->st_gid; 153 tbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 154 tbuf.st_size = buf->st_size; 155 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 156 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 157 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 158 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 159 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 160 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 161 tbuf.st_blksize = buf->st_blksize; 162 tbuf.st_blocks = buf->st_blocks; 163 164 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 165 } 166 167 168 #ifdef LINUX_LEGACY_SYSCALLS 169 int 170 linux_newstat(struct thread *td, struct linux_newstat_args *args) 171 { 172 struct stat buf; 173 int error; 174 175 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 176 if (error) 177 return (error); 178 return (newstat_copyout(&buf, args->buf)); 179 } 180 181 int 182 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 183 { 184 struct stat sb; 185 int error; 186 187 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 188 if (error) 189 return (error); 190 return (newstat_copyout(&sb, args->buf)); 191 } 192 #endif 193 194 int 195 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 196 { 197 struct stat buf; 198 int error; 199 200 error = linux_kern_fstat(td, args->fd, &buf); 201 if (!error) 202 error = newstat_copyout(&buf, args->buf); 203 204 return (error); 205 } 206 207 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 208 209 static __inline uint16_t 210 linux_old_encode_dev(dev_t _dev) 211 { 212 213 return (_dev == NODEV ? 0 : linux_encode_dev(major(_dev), minor(_dev))); 214 } 215 216 static int 217 old_stat_copyout(struct stat *buf, void *ubuf) 218 { 219 struct l_old_stat lbuf; 220 221 bzero(&lbuf, sizeof(lbuf)); 222 lbuf.st_dev = linux_old_encode_dev(buf->st_dev); 223 lbuf.st_ino = buf->st_ino; 224 lbuf.st_mode = buf->st_mode; 225 lbuf.st_nlink = buf->st_nlink; 226 lbuf.st_uid = buf->st_uid; 227 lbuf.st_gid = buf->st_gid; 228 lbuf.st_rdev = linux_old_encode_dev(buf->st_rdev); 229 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 230 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 231 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 232 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 233 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 234 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 235 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 236 lbuf.st_blksize = buf->st_blksize; 237 lbuf.st_blocks = buf->st_blocks; 238 lbuf.st_flags = buf->st_flags; 239 lbuf.st_gen = buf->st_gen; 240 241 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 242 } 243 244 int 245 linux_stat(struct thread *td, struct linux_stat_args *args) 246 { 247 struct stat buf; 248 int error; 249 250 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 251 if (error) { 252 return (error); 253 } 254 return (old_stat_copyout(&buf, args->up)); 255 } 256 257 int 258 linux_lstat(struct thread *td, struct linux_lstat_args *args) 259 { 260 struct stat buf; 261 int error; 262 263 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 264 if (error) { 265 return (error); 266 } 267 return (old_stat_copyout(&buf, args->up)); 268 } 269 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 270 271 struct l_statfs { 272 l_long f_type; 273 l_long f_bsize; 274 l_long f_blocks; 275 l_long f_bfree; 276 l_long f_bavail; 277 l_long f_files; 278 l_long f_ffree; 279 l_fsid_t f_fsid; 280 l_long f_namelen; 281 l_long f_frsize; 282 l_long f_flags; 283 l_long f_spare[4]; 284 }; 285 286 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 287 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 288 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 289 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 290 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 291 #define LINUX_NCP_SUPER_MAGIC 0x564cL 292 #define LINUX_NFS_SUPER_MAGIC 0x6969L 293 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 294 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 295 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 296 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 297 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 298 #define LINUX_SHMFS_MAGIC 0x01021994 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 {NULL, 0L}}; 319 320 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 321 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 322 return (b2l_tbl[i].linux_type); 323 324 return (0L); 325 } 326 327 static int 328 bsd_to_linux_mnt_flags(int f_flags) 329 { 330 int flags = LINUX_ST_VALID; 331 332 if (f_flags & MNT_RDONLY) 333 flags |= LINUX_ST_RDONLY; 334 if (f_flags & MNT_NOEXEC) 335 flags |= LINUX_ST_NOEXEC; 336 if (f_flags & MNT_NOSUID) 337 flags |= LINUX_ST_NOSUID; 338 if (f_flags & MNT_NOATIME) 339 flags |= LINUX_ST_NOATIME; 340 if (f_flags & MNT_NOSYMFOLLOW) 341 flags |= LINUX_ST_NOSYMFOLLOW; 342 if (f_flags & MNT_SYNCHRONOUS) 343 flags |= LINUX_ST_SYNCHRONOUS; 344 345 return (flags); 346 } 347 348 static int 349 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 350 { 351 352 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 353 statfs_scale_blocks(bsd_statfs, INT32_MAX); 354 #endif 355 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 356 linux_statfs->f_bsize = bsd_statfs->f_bsize; 357 linux_statfs->f_blocks = bsd_statfs->f_blocks; 358 linux_statfs->f_bfree = bsd_statfs->f_bfree; 359 linux_statfs->f_bavail = bsd_statfs->f_bavail; 360 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 361 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 362 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 363 #else 364 linux_statfs->f_ffree = bsd_statfs->f_ffree; 365 linux_statfs->f_files = bsd_statfs->f_files; 366 #endif 367 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 368 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 369 linux_statfs->f_namelen = MAXNAMLEN; 370 linux_statfs->f_frsize = bsd_statfs->f_bsize; 371 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 372 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 373 374 return (0); 375 } 376 377 int 378 linux_statfs(struct thread *td, struct linux_statfs_args *args) 379 { 380 struct l_statfs linux_statfs; 381 struct statfs *bsd_statfs; 382 int error; 383 384 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 385 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 386 if (error == 0) 387 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 388 free(bsd_statfs, M_STATFS); 389 if (error != 0) 390 return (error); 391 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 392 } 393 394 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 395 static void 396 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 397 { 398 399 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 400 linux_statfs->f_bsize = bsd_statfs->f_bsize; 401 linux_statfs->f_blocks = bsd_statfs->f_blocks; 402 linux_statfs->f_bfree = bsd_statfs->f_bfree; 403 linux_statfs->f_bavail = bsd_statfs->f_bavail; 404 linux_statfs->f_ffree = bsd_statfs->f_ffree; 405 linux_statfs->f_files = bsd_statfs->f_files; 406 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 407 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 408 linux_statfs->f_namelen = MAXNAMLEN; 409 linux_statfs->f_frsize = bsd_statfs->f_bsize; 410 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 411 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 412 } 413 414 int 415 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 416 { 417 struct l_statfs64 linux_statfs; 418 struct statfs *bsd_statfs; 419 int error; 420 421 if (args->bufsize != sizeof(struct l_statfs64)) 422 return (EINVAL); 423 424 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 425 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 426 if (error == 0) 427 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 428 free(bsd_statfs, M_STATFS); 429 if (error != 0) 430 return (error); 431 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 432 } 433 434 int 435 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 436 { 437 struct l_statfs64 linux_statfs; 438 struct statfs *bsd_statfs; 439 int error; 440 441 if (args->bufsize != sizeof(struct l_statfs64)) 442 return (EINVAL); 443 444 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 445 error = kern_fstatfs(td, args->fd, bsd_statfs); 446 if (error == 0) 447 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 448 free(bsd_statfs, M_STATFS); 449 if (error != 0) 450 return (error); 451 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 452 } 453 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 454 455 int 456 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 457 { 458 struct l_statfs linux_statfs; 459 struct statfs *bsd_statfs; 460 int error; 461 462 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 463 error = kern_fstatfs(td, args->fd, bsd_statfs); 464 if (error == 0) 465 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 466 free(bsd_statfs, M_STATFS); 467 if (error != 0) 468 return (error); 469 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 470 } 471 472 struct l_ustat 473 { 474 l_daddr_t f_tfree; 475 l_ino_t f_tinode; 476 char f_fname[6]; 477 char f_fpack[6]; 478 }; 479 480 #ifdef LINUX_LEGACY_SYSCALLS 481 int 482 linux_ustat(struct thread *td, struct linux_ustat_args *args) 483 { 484 485 return (EOPNOTSUPP); 486 } 487 #endif 488 489 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 490 491 static int 492 stat64_copyout(struct stat *buf, void *ubuf) 493 { 494 struct l_stat64 lbuf; 495 496 bzero(&lbuf, sizeof(lbuf)); 497 lbuf.st_dev = linux_new_encode_dev(buf->st_dev); 498 lbuf.st_ino = buf->st_ino; 499 lbuf.st_mode = buf->st_mode; 500 lbuf.st_nlink = buf->st_nlink; 501 lbuf.st_uid = buf->st_uid; 502 lbuf.st_gid = buf->st_gid; 503 lbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 504 lbuf.st_size = buf->st_size; 505 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 506 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 507 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 508 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 509 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 510 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 511 lbuf.st_blksize = buf->st_blksize; 512 lbuf.st_blocks = buf->st_blocks; 513 514 /* 515 * The __st_ino field makes all the difference. In the Linux kernel 516 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 517 * but without the assignment to __st_ino the runtime linker refuses 518 * to mmap(2) any shared libraries. I guess it's broken alright :-) 519 */ 520 lbuf.__st_ino = buf->st_ino; 521 522 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 523 } 524 525 int 526 linux_stat64(struct thread *td, struct linux_stat64_args *args) 527 { 528 struct stat buf; 529 int error; 530 531 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 532 if (error) 533 return (error); 534 return (stat64_copyout(&buf, args->statbuf)); 535 } 536 537 int 538 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 539 { 540 struct stat sb; 541 int error; 542 543 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 544 if (error) 545 return (error); 546 return (stat64_copyout(&sb, args->statbuf)); 547 } 548 549 int 550 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 551 { 552 struct stat buf; 553 int error; 554 555 error = linux_kern_fstat(td, args->fd, &buf); 556 if (!error) 557 error = stat64_copyout(&buf, args->statbuf); 558 559 return (error); 560 } 561 562 int 563 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 564 { 565 int error, dfd, flag, unsupported; 566 struct stat buf; 567 568 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 569 if (unsupported != 0) { 570 linux_msg(td, "fstatat64 unsupported flag 0x%x", unsupported); 571 return (EINVAL); 572 } 573 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 574 AT_SYMLINK_NOFOLLOW : 0; 575 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 576 AT_EMPTY_PATH : 0; 577 578 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 579 error = linux_kern_statat(td, flag, dfd, args->pathname, 580 UIO_USERSPACE, &buf); 581 if (error == 0) 582 error = stat64_copyout(&buf, args->statbuf); 583 584 return (error); 585 } 586 587 #else /* __amd64__ && !COMPAT_LINUX32 */ 588 589 int 590 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 591 { 592 int error, dfd, flag, unsupported; 593 struct stat buf; 594 595 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 596 if (unsupported != 0) { 597 linux_msg(td, "fstatat unsupported flag 0x%x", unsupported); 598 return (EINVAL); 599 } 600 601 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 602 AT_SYMLINK_NOFOLLOW : 0; 603 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 604 AT_EMPTY_PATH : 0; 605 606 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 607 error = linux_kern_statat(td, flag, dfd, args->pathname, 608 UIO_USERSPACE, &buf); 609 if (error == 0) 610 error = newstat_copyout(&buf, args->statbuf); 611 612 return (error); 613 } 614 615 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 616 617 int 618 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 619 { 620 struct mount *mp; 621 struct vnode *vp; 622 int error, save; 623 624 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 625 if (error != 0) 626 /* 627 * Linux syncfs() returns only EBADF, however fgetvp() 628 * can return EINVAL in case of file descriptor does 629 * not represent a vnode. XXX. 630 */ 631 return (error); 632 633 mp = vp->v_mount; 634 mtx_lock(&mountlist_mtx); 635 error = vfs_busy(mp, MBF_MNTLSTLOCK); 636 if (error != 0) { 637 /* See comment above. */ 638 mtx_unlock(&mountlist_mtx); 639 goto out; 640 } 641 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 642 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 643 save = curthread_pflags_set(TDP_SYNCIO); 644 vfs_periodic(mp, MNT_NOWAIT); 645 VFS_SYNC(mp, MNT_NOWAIT); 646 curthread_pflags_restore(save); 647 vn_finished_write(mp); 648 } 649 vfs_unbusy(mp); 650 651 out: 652 vrele(vp); 653 return (error); 654 } 655 656 static int 657 statx_copyout(struct stat *buf, void *ubuf) 658 { 659 struct l_statx tbuf; 660 661 bzero(&tbuf, sizeof(tbuf)); 662 tbuf.stx_mask = STATX_ALL; 663 tbuf.stx_blksize = buf->st_blksize; 664 tbuf.stx_attributes = 0; 665 tbuf.stx_nlink = buf->st_nlink; 666 tbuf.stx_uid = buf->st_uid; 667 tbuf.stx_gid = buf->st_gid; 668 tbuf.stx_mode = buf->st_mode; 669 tbuf.stx_ino = buf->st_ino; 670 tbuf.stx_size = buf->st_size; 671 tbuf.stx_blocks = buf->st_blocks; 672 673 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 674 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 675 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 676 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 677 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 678 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 679 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 680 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 681 tbuf.stx_rdev_major = linux_encode_major(buf->st_rdev); 682 tbuf.stx_rdev_minor = linux_encode_minor(buf->st_rdev); 683 tbuf.stx_dev_major = linux_encode_major(buf->st_dev); 684 tbuf.stx_dev_minor = linux_encode_minor(buf->st_dev); 685 686 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 687 } 688 689 int 690 linux_statx(struct thread *td, struct linux_statx_args *args) 691 { 692 int error, dirfd, flags, unsupported; 693 struct stat buf; 694 695 unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 696 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 697 if (unsupported != 0) { 698 linux_msg(td, "statx unsupported flags 0x%x", unsupported); 699 return (EINVAL); 700 } 701 702 flags = (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) ? 703 AT_SYMLINK_NOFOLLOW : 0; 704 flags |= (args->flags & LINUX_AT_EMPTY_PATH) ? 705 AT_EMPTY_PATH : 0; 706 707 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 708 error = linux_kern_statat(td, flags, dirfd, args->pathname, 709 UIO_USERSPACE, &buf); 710 if (error == 0) 711 error = statx_copyout(&buf, args->statxbuf); 712 713 return (error); 714 } 715