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_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 char *path; 176 int error; 177 178 if (!LUSECONVPATH(td)) { 179 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 180 } else { 181 LCONVPATHEXIST(args->path, &path); 182 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 183 LFREEPATH(path); 184 } 185 if (error) 186 return (error); 187 return (newstat_copyout(&buf, args->buf)); 188 } 189 190 int 191 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 192 { 193 struct stat sb; 194 char *path; 195 int error; 196 197 if (!LUSECONVPATH(td)) { 198 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 199 } else { 200 LCONVPATHEXIST(args->path, &path); 201 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 202 LFREEPATH(path); 203 } 204 if (error) 205 return (error); 206 return (newstat_copyout(&sb, args->buf)); 207 } 208 #endif 209 210 int 211 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 212 { 213 struct stat buf; 214 int error; 215 216 error = linux_kern_fstat(td, args->fd, &buf); 217 if (!error) 218 error = newstat_copyout(&buf, args->buf); 219 220 return (error); 221 } 222 223 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 224 225 static __inline uint16_t 226 linux_old_encode_dev(dev_t _dev) 227 { 228 229 return (_dev == NODEV ? 0 : linux_encode_dev(major(_dev), minor(_dev))); 230 } 231 232 static int 233 old_stat_copyout(struct stat *buf, void *ubuf) 234 { 235 struct l_old_stat lbuf; 236 237 bzero(&lbuf, sizeof(lbuf)); 238 lbuf.st_dev = linux_old_encode_dev(buf->st_dev); 239 lbuf.st_ino = buf->st_ino; 240 lbuf.st_mode = buf->st_mode; 241 lbuf.st_nlink = buf->st_nlink; 242 lbuf.st_uid = buf->st_uid; 243 lbuf.st_gid = buf->st_gid; 244 lbuf.st_rdev = linux_old_encode_dev(buf->st_rdev); 245 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 246 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 247 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 248 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 249 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 250 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 251 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 252 lbuf.st_blksize = buf->st_blksize; 253 lbuf.st_blocks = buf->st_blocks; 254 lbuf.st_flags = buf->st_flags; 255 lbuf.st_gen = buf->st_gen; 256 257 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 258 } 259 260 int 261 linux_stat(struct thread *td, struct linux_stat_args *args) 262 { 263 struct stat buf; 264 char *path; 265 int error; 266 267 if (!LUSECONVPATH(td)) { 268 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 269 } else { 270 LCONVPATHEXIST(args->path, &path); 271 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 272 LFREEPATH(path); 273 } 274 if (error) { 275 return (error); 276 } 277 return (old_stat_copyout(&buf, args->up)); 278 } 279 280 int 281 linux_lstat(struct thread *td, struct linux_lstat_args *args) 282 { 283 struct stat buf; 284 char *path; 285 int error; 286 287 if (!LUSECONVPATH(td)) { 288 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 289 } else { 290 LCONVPATHEXIST(args->path, &path); 291 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 292 LFREEPATH(path); 293 } 294 if (error) { 295 return (error); 296 } 297 return (old_stat_copyout(&buf, args->up)); 298 } 299 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 300 301 struct l_statfs { 302 l_long f_type; 303 l_long f_bsize; 304 l_long f_blocks; 305 l_long f_bfree; 306 l_long f_bavail; 307 l_long f_files; 308 l_long f_ffree; 309 l_fsid_t f_fsid; 310 l_long f_namelen; 311 l_long f_frsize; 312 l_long f_flags; 313 l_long f_spare[4]; 314 }; 315 316 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 317 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 318 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 319 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 320 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 321 #define LINUX_NCP_SUPER_MAGIC 0x564cL 322 #define LINUX_NFS_SUPER_MAGIC 0x6969L 323 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 324 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 325 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 326 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 327 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 328 #define LINUX_SHMFS_MAGIC 0x01021994 329 330 static long 331 bsd_to_linux_ftype(const char *fstypename) 332 { 333 int i; 334 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 335 {"ufs", LINUX_UFS_SUPER_MAGIC}, 336 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 337 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 338 {"nfs", LINUX_NFS_SUPER_MAGIC}, 339 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 340 {"procfs", LINUX_PROC_SUPER_MAGIC}, 341 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 342 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 343 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 344 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 345 {"coda", LINUX_CODA_SUPER_MAGIC}, 346 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 347 {"tmpfs", LINUX_SHMFS_MAGIC}, 348 {NULL, 0L}}; 349 350 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 351 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 352 return (b2l_tbl[i].linux_type); 353 354 return (0L); 355 } 356 357 static int 358 bsd_to_linux_mnt_flags(int f_flags) 359 { 360 int flags = LINUX_ST_VALID; 361 362 if (f_flags & MNT_RDONLY) 363 flags |= LINUX_ST_RDONLY; 364 if (f_flags & MNT_NOEXEC) 365 flags |= LINUX_ST_NOEXEC; 366 if (f_flags & MNT_NOSUID) 367 flags |= LINUX_ST_NOSUID; 368 if (f_flags & MNT_NOATIME) 369 flags |= LINUX_ST_NOATIME; 370 if (f_flags & MNT_NOSYMFOLLOW) 371 flags |= LINUX_ST_NOSYMFOLLOW; 372 if (f_flags & MNT_SYNCHRONOUS) 373 flags |= LINUX_ST_SYNCHRONOUS; 374 375 return (flags); 376 } 377 378 static int 379 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 380 { 381 382 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 383 statfs_scale_blocks(bsd_statfs, INT32_MAX); 384 #endif 385 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 386 linux_statfs->f_bsize = bsd_statfs->f_bsize; 387 linux_statfs->f_blocks = bsd_statfs->f_blocks; 388 linux_statfs->f_bfree = bsd_statfs->f_bfree; 389 linux_statfs->f_bavail = bsd_statfs->f_bavail; 390 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 391 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 392 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 393 #else 394 linux_statfs->f_ffree = bsd_statfs->f_ffree; 395 linux_statfs->f_files = bsd_statfs->f_files; 396 #endif 397 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 398 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 399 linux_statfs->f_namelen = MAXNAMLEN; 400 linux_statfs->f_frsize = bsd_statfs->f_bsize; 401 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 402 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 403 404 return (0); 405 } 406 407 int 408 linux_statfs(struct thread *td, struct linux_statfs_args *args) 409 { 410 struct l_statfs linux_statfs; 411 struct statfs *bsd_statfs; 412 char *path; 413 int error; 414 415 if (!LUSECONVPATH(td)) { 416 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 417 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 418 } else { 419 LCONVPATHEXIST(args->path, &path); 420 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 421 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 422 LFREEPATH(path); 423 } 424 if (error == 0) 425 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 426 free(bsd_statfs, M_STATFS); 427 if (error != 0) 428 return (error); 429 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 430 } 431 432 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 433 static void 434 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 435 { 436 437 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 438 linux_statfs->f_bsize = bsd_statfs->f_bsize; 439 linux_statfs->f_blocks = bsd_statfs->f_blocks; 440 linux_statfs->f_bfree = bsd_statfs->f_bfree; 441 linux_statfs->f_bavail = bsd_statfs->f_bavail; 442 linux_statfs->f_ffree = bsd_statfs->f_ffree; 443 linux_statfs->f_files = bsd_statfs->f_files; 444 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 445 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 446 linux_statfs->f_namelen = MAXNAMLEN; 447 linux_statfs->f_frsize = bsd_statfs->f_bsize; 448 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 449 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 450 } 451 452 int 453 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 454 { 455 struct l_statfs64 linux_statfs; 456 struct statfs *bsd_statfs; 457 char *path; 458 int error; 459 460 if (args->bufsize != sizeof(struct l_statfs64)) 461 return (EINVAL); 462 463 if (!LUSECONVPATH(td)) { 464 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 465 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 466 } else { 467 LCONVPATHEXIST(args->path, &path); 468 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 469 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 470 LFREEPATH(path); 471 } 472 if (error == 0) 473 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 474 free(bsd_statfs, M_STATFS); 475 if (error != 0) 476 return (error); 477 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 478 } 479 480 int 481 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 482 { 483 struct l_statfs64 linux_statfs; 484 struct statfs *bsd_statfs; 485 int error; 486 487 if (args->bufsize != sizeof(struct l_statfs64)) 488 return (EINVAL); 489 490 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 491 error = kern_fstatfs(td, args->fd, bsd_statfs); 492 if (error == 0) 493 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 494 free(bsd_statfs, M_STATFS); 495 if (error != 0) 496 return (error); 497 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 498 } 499 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 500 501 int 502 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 503 { 504 struct l_statfs linux_statfs; 505 struct statfs *bsd_statfs; 506 int error; 507 508 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 509 error = kern_fstatfs(td, args->fd, bsd_statfs); 510 if (error == 0) 511 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 512 free(bsd_statfs, M_STATFS); 513 if (error != 0) 514 return (error); 515 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 516 } 517 518 struct l_ustat 519 { 520 l_daddr_t f_tfree; 521 l_ino_t f_tinode; 522 char f_fname[6]; 523 char f_fpack[6]; 524 }; 525 526 #ifdef LINUX_LEGACY_SYSCALLS 527 int 528 linux_ustat(struct thread *td, struct linux_ustat_args *args) 529 { 530 531 return (EOPNOTSUPP); 532 } 533 #endif 534 535 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 536 537 static int 538 stat64_copyout(struct stat *buf, void *ubuf) 539 { 540 struct l_stat64 lbuf; 541 542 bzero(&lbuf, sizeof(lbuf)); 543 lbuf.st_dev = linux_new_encode_dev(buf->st_dev); 544 lbuf.st_ino = buf->st_ino; 545 lbuf.st_mode = buf->st_mode; 546 lbuf.st_nlink = buf->st_nlink; 547 lbuf.st_uid = buf->st_uid; 548 lbuf.st_gid = buf->st_gid; 549 lbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 550 lbuf.st_size = buf->st_size; 551 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 552 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 553 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 554 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 555 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 556 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 557 lbuf.st_blksize = buf->st_blksize; 558 lbuf.st_blocks = buf->st_blocks; 559 560 /* 561 * The __st_ino field makes all the difference. In the Linux kernel 562 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 563 * but without the assignment to __st_ino the runtime linker refuses 564 * to mmap(2) any shared libraries. I guess it's broken alright :-) 565 */ 566 lbuf.__st_ino = buf->st_ino; 567 568 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 569 } 570 571 int 572 linux_stat64(struct thread *td, struct linux_stat64_args *args) 573 { 574 struct stat buf; 575 char *filename; 576 int error; 577 578 if (!LUSECONVPATH(td)) { 579 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 580 } else { 581 LCONVPATHEXIST(args->filename, &filename); 582 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 583 LFREEPATH(filename); 584 } 585 if (error) 586 return (error); 587 return (stat64_copyout(&buf, args->statbuf)); 588 } 589 590 int 591 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 592 { 593 struct stat sb; 594 char *filename; 595 int error; 596 597 if (!LUSECONVPATH(td)) { 598 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 599 } else { 600 LCONVPATHEXIST(args->filename, &filename); 601 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 602 LFREEPATH(filename); 603 } 604 if (error) 605 return (error); 606 return (stat64_copyout(&sb, args->statbuf)); 607 } 608 609 int 610 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 611 { 612 struct stat buf; 613 int error; 614 615 error = linux_kern_fstat(td, args->fd, &buf); 616 if (!error) 617 error = stat64_copyout(&buf, args->statbuf); 618 619 return (error); 620 } 621 622 int 623 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 624 { 625 char *path; 626 int error, dfd, flag, unsupported; 627 struct stat buf; 628 629 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 630 if (unsupported != 0) { 631 linux_msg(td, "fstatat64 unsupported flag 0x%x", unsupported); 632 return (EINVAL); 633 } 634 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 635 AT_SYMLINK_NOFOLLOW : 0; 636 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 637 AT_EMPTY_PATH : 0; 638 639 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 640 if (!LUSECONVPATH(td)) { 641 error = linux_kern_statat(td, flag, dfd, args->pathname, 642 UIO_USERSPACE, &buf); 643 } else { 644 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 645 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 646 LFREEPATH(path); 647 } 648 if (error == 0) 649 error = stat64_copyout(&buf, args->statbuf); 650 651 return (error); 652 } 653 654 #else /* __amd64__ && !COMPAT_LINUX32 */ 655 656 int 657 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 658 { 659 char *path; 660 int error, dfd, flag, unsupported; 661 struct stat buf; 662 663 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 664 if (unsupported != 0) { 665 linux_msg(td, "fstatat unsupported flag 0x%x", unsupported); 666 return (EINVAL); 667 } 668 669 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 670 AT_SYMLINK_NOFOLLOW : 0; 671 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 672 AT_EMPTY_PATH : 0; 673 674 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 675 if (!LUSECONVPATH(td)) { 676 error = linux_kern_statat(td, flag, dfd, args->pathname, 677 UIO_USERSPACE, &buf); 678 } else { 679 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 680 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 681 LFREEPATH(path); 682 } 683 if (error == 0) 684 error = newstat_copyout(&buf, args->statbuf); 685 686 return (error); 687 } 688 689 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 690 691 int 692 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 693 { 694 struct mount *mp; 695 struct vnode *vp; 696 int error, save; 697 698 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 699 if (error != 0) 700 /* 701 * Linux syncfs() returns only EBADF, however fgetvp() 702 * can return EINVAL in case of file descriptor does 703 * not represent a vnode. XXX. 704 */ 705 return (error); 706 707 mp = vp->v_mount; 708 mtx_lock(&mountlist_mtx); 709 error = vfs_busy(mp, MBF_MNTLSTLOCK); 710 if (error != 0) { 711 /* See comment above. */ 712 mtx_unlock(&mountlist_mtx); 713 goto out; 714 } 715 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 716 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 717 save = curthread_pflags_set(TDP_SYNCIO); 718 vfs_periodic(mp, MNT_NOWAIT); 719 VFS_SYNC(mp, MNT_NOWAIT); 720 curthread_pflags_restore(save); 721 vn_finished_write(mp); 722 } 723 vfs_unbusy(mp); 724 725 out: 726 vrele(vp); 727 return (error); 728 } 729 730 static int 731 statx_copyout(struct stat *buf, void *ubuf) 732 { 733 struct l_statx tbuf; 734 735 bzero(&tbuf, sizeof(tbuf)); 736 tbuf.stx_mask = STATX_ALL; 737 tbuf.stx_blksize = buf->st_blksize; 738 tbuf.stx_attributes = 0; 739 tbuf.stx_nlink = buf->st_nlink; 740 tbuf.stx_uid = buf->st_uid; 741 tbuf.stx_gid = buf->st_gid; 742 tbuf.stx_mode = buf->st_mode; 743 tbuf.stx_ino = buf->st_ino; 744 tbuf.stx_size = buf->st_size; 745 tbuf.stx_blocks = buf->st_blocks; 746 747 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 748 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 749 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 750 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 751 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 752 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 753 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 754 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 755 tbuf.stx_rdev_major = linux_encode_major(buf->st_rdev); 756 tbuf.stx_rdev_minor = linux_encode_minor(buf->st_rdev); 757 tbuf.stx_dev_major = linux_encode_major(buf->st_dev); 758 tbuf.stx_dev_minor = linux_encode_minor(buf->st_dev); 759 760 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 761 } 762 763 int 764 linux_statx(struct thread *td, struct linux_statx_args *args) 765 { 766 char *path; 767 int error, dirfd, flags, unsupported; 768 struct stat buf; 769 770 unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 771 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 772 if (unsupported != 0) { 773 linux_msg(td, "statx unsupported flags 0x%x", unsupported); 774 return (EINVAL); 775 } 776 777 flags = (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) ? 778 AT_SYMLINK_NOFOLLOW : 0; 779 flags |= (args->flags & LINUX_AT_EMPTY_PATH) ? 780 AT_EMPTY_PATH : 0; 781 782 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 783 if (!LUSECONVPATH(td)) { 784 error = linux_kern_statat(td, flags, dirfd, args->pathname, 785 UIO_USERSPACE, &buf); 786 } else { 787 LCONVPATHEXIST_AT(args->pathname, &path, dirfd); 788 error = linux_kern_statat(td, flags, dirfd, path, UIO_SYSSPACE, &buf); 789 LFREEPATH(path); 790 } 791 if (error == 0) 792 error = statx_copyout(&buf, args->statxbuf); 793 794 return (error); 795 } 796