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 * Linux dev_t conversion routines. 63 * 64 * As of version 2.6.0 of the Linux kernel, dev_t is a 32-bit quantity 65 * with 12 bits set asaid for the major number and 20 for the minor number. 66 * The in-kernel dev_t encoded as MMMmmmmm, where M is a hex digit of the 67 * major number and m is a hex digit of the minor number. 68 * The user-space dev_t encoded as mmmM MMmm, where M and m is the major 69 * and minor numbers accordingly. This is downward compatible with legacy 70 * systems where dev_t is 16 bits wide, encoded as MMmm. 71 * In glibc dev_t is a 64-bit quantity, with 32-bit major and minor numbers, 72 * encoded as MMMM Mmmm mmmM MMmm. This is downward compatible with the Linux 73 * kernel and with legacy systems where dev_t is 16 bits wide. 74 * 75 * In the FreeBSD dev_t is a 64-bit quantity. The major and minor numbers 76 * are encoded as MMMmmmMm, therefore conversion of the device numbers between 77 * Linux user-space and FreeBSD kernel required. 78 */ 79 static l_dev_t 80 linux_encode_dev(int _major, int _minor) 81 { 82 83 return ((_minor & 0xff) | ((_major & 0xfff) << 8) | 84 (((_minor & ~0xff) << 12) & 0xfff00000)); 85 } 86 87 static l_dev_t 88 linux_new_encode_dev(dev_t _dev) 89 { 90 91 return (_dev == NODEV ? 0 : linux_encode_dev(major(_dev), minor(_dev))); 92 } 93 94 static int 95 linux_encode_major(dev_t _dev) 96 { 97 98 return (_dev == NODEV ? 0 : major(_dev) & 0xfff); 99 } 100 101 static int 102 linux_encode_minor(dev_t _dev) 103 { 104 105 return (_dev == NODEV ? 0 : minor(_dev) & 0xfffff); 106 } 107 108 static int 109 linux_kern_fstat(struct thread *td, int fd, struct stat *sbp) 110 { 111 struct vnode *vp; 112 struct file *fp; 113 int error; 114 115 AUDIT_ARG_FD(fd); 116 117 error = fget(td, fd, &cap_fstat_rights, &fp); 118 if (__predict_false(error != 0)) 119 return (error); 120 121 AUDIT_ARG_FILE(td->td_proc, fp); 122 123 error = fo_stat(fp, sbp, td->td_ucred); 124 if (error == 0 && (vp = fp->f_vnode) != NULL) 125 translate_vnhook_major_minor(vp, sbp); 126 fdrop(fp, td); 127 #ifdef KTRACE 128 if (KTRPOINT(td, KTR_STRUCT)) 129 ktrstat_error(sbp, error); 130 #endif 131 return (error); 132 } 133 134 static int 135 linux_kern_statat(struct thread *td, int flag, int fd, const char *path, 136 enum uio_seg pathseg, struct stat *sbp) 137 { 138 struct nameidata nd; 139 int error; 140 141 if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH | 142 AT_EMPTY_PATH)) != 0) 143 return (EINVAL); 144 145 NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_RESOLVE_BENEATH | 146 AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) | LOCKSHARED | LOCKLEAF | 147 AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights); 148 149 if ((error = namei(&nd)) != 0) { 150 if (error == ENOTDIR && 151 (nd.ni_resflags & NIRES_EMPTYPATH) != 0) 152 error = linux_kern_fstat(td, fd, sbp); 153 return (error); 154 } 155 error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED); 156 if (error == 0) 157 translate_vnhook_major_minor(nd.ni_vp, sbp); 158 NDFREE_PNBUF(&nd); 159 vput(nd.ni_vp); 160 #ifdef KTRACE 161 if (KTRPOINT(td, KTR_STRUCT)) 162 ktrstat_error(sbp, error); 163 #endif 164 return (error); 165 } 166 167 #ifdef LINUX_LEGACY_SYSCALLS 168 static int 169 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 170 struct stat *sbp) 171 { 172 173 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 174 } 175 176 static int 177 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 178 struct stat *sbp) 179 { 180 181 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 182 pathseg, sbp)); 183 } 184 #endif 185 186 static int 187 newstat_copyout(struct stat *buf, void *ubuf) 188 { 189 struct l_newstat tbuf; 190 191 bzero(&tbuf, sizeof(tbuf)); 192 tbuf.st_dev = linux_new_encode_dev(buf->st_dev); 193 tbuf.st_ino = buf->st_ino; 194 tbuf.st_mode = buf->st_mode; 195 tbuf.st_nlink = buf->st_nlink; 196 tbuf.st_uid = buf->st_uid; 197 tbuf.st_gid = buf->st_gid; 198 tbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 199 tbuf.st_size = buf->st_size; 200 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 201 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 202 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 203 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 204 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 205 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 206 tbuf.st_blksize = buf->st_blksize; 207 tbuf.st_blocks = buf->st_blocks; 208 209 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 210 } 211 212 213 #ifdef LINUX_LEGACY_SYSCALLS 214 int 215 linux_newstat(struct thread *td, struct linux_newstat_args *args) 216 { 217 struct stat buf; 218 int error; 219 220 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 221 if (error) 222 return (error); 223 return (newstat_copyout(&buf, args->buf)); 224 } 225 226 int 227 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 228 { 229 struct stat sb; 230 int error; 231 232 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 233 if (error) 234 return (error); 235 return (newstat_copyout(&sb, args->buf)); 236 } 237 #endif 238 239 int 240 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 241 { 242 struct stat buf; 243 int error; 244 245 error = linux_kern_fstat(td, args->fd, &buf); 246 if (!error) 247 error = newstat_copyout(&buf, args->buf); 248 249 return (error); 250 } 251 252 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 253 254 static __inline uint16_t 255 linux_old_encode_dev(dev_t _dev) 256 { 257 258 return (_dev == NODEV ? 0 : linux_encode_dev(major(_dev), minor(_dev))); 259 } 260 261 static int 262 old_stat_copyout(struct stat *buf, void *ubuf) 263 { 264 struct l_old_stat lbuf; 265 266 bzero(&lbuf, sizeof(lbuf)); 267 lbuf.st_dev = linux_old_encode_dev(buf->st_dev); 268 lbuf.st_ino = buf->st_ino; 269 lbuf.st_mode = buf->st_mode; 270 lbuf.st_nlink = buf->st_nlink; 271 lbuf.st_uid = buf->st_uid; 272 lbuf.st_gid = buf->st_gid; 273 lbuf.st_rdev = linux_old_encode_dev(buf->st_rdev); 274 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 275 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 276 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 277 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 278 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 279 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 280 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 281 lbuf.st_blksize = buf->st_blksize; 282 lbuf.st_blocks = buf->st_blocks; 283 lbuf.st_flags = buf->st_flags; 284 lbuf.st_gen = buf->st_gen; 285 286 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 287 } 288 289 int 290 linux_stat(struct thread *td, struct linux_stat_args *args) 291 { 292 struct stat buf; 293 int error; 294 295 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 296 if (error) { 297 return (error); 298 } 299 return (old_stat_copyout(&buf, args->up)); 300 } 301 302 int 303 linux_lstat(struct thread *td, struct linux_lstat_args *args) 304 { 305 struct stat buf; 306 int error; 307 308 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 309 if (error) { 310 return (error); 311 } 312 return (old_stat_copyout(&buf, args->up)); 313 } 314 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 315 316 struct l_statfs { 317 l_long f_type; 318 l_long f_bsize; 319 l_long f_blocks; 320 l_long f_bfree; 321 l_long f_bavail; 322 l_long f_files; 323 l_long f_ffree; 324 l_fsid_t f_fsid; 325 l_long f_namelen; 326 l_long f_frsize; 327 l_long f_flags; 328 l_long f_spare[4]; 329 }; 330 331 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 332 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 333 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 334 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 335 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 336 #define LINUX_NCP_SUPER_MAGIC 0x564cL 337 #define LINUX_NFS_SUPER_MAGIC 0x6969L 338 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 339 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 340 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 341 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 342 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 343 #define LINUX_SHMFS_MAGIC 0x01021994 344 #define LINUX_SYSFS_MAGIC 0x62656572 345 346 static long 347 bsd_to_linux_ftype(const char *fstypename) 348 { 349 int i; 350 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 351 {"ufs", LINUX_UFS_SUPER_MAGIC}, 352 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 353 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 354 {"nfs", LINUX_NFS_SUPER_MAGIC}, 355 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 356 {"procfs", LINUX_PROC_SUPER_MAGIC}, 357 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 358 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 359 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 360 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 361 {"coda", LINUX_CODA_SUPER_MAGIC}, 362 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 363 {"tmpfs", LINUX_SHMFS_MAGIC}, 364 {"linsysfs", LINUX_SYSFS_MAGIC}, 365 {NULL, 0L}}; 366 367 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 368 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 369 return (b2l_tbl[i].linux_type); 370 371 return (0L); 372 } 373 374 static int 375 bsd_to_linux_mnt_flags(int f_flags) 376 { 377 int flags = LINUX_ST_VALID; 378 379 if (f_flags & MNT_RDONLY) 380 flags |= LINUX_ST_RDONLY; 381 if (f_flags & MNT_NOEXEC) 382 flags |= LINUX_ST_NOEXEC; 383 if (f_flags & MNT_NOSUID) 384 flags |= LINUX_ST_NOSUID; 385 if (f_flags & MNT_NOATIME) 386 flags |= LINUX_ST_NOATIME; 387 if (f_flags & MNT_NOSYMFOLLOW) 388 flags |= LINUX_ST_NOSYMFOLLOW; 389 if (f_flags & MNT_SYNCHRONOUS) 390 flags |= LINUX_ST_SYNCHRONOUS; 391 392 return (flags); 393 } 394 395 static int 396 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 397 { 398 399 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 400 statfs_scale_blocks(bsd_statfs, INT32_MAX); 401 #endif 402 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 403 linux_statfs->f_bsize = bsd_statfs->f_bsize; 404 linux_statfs->f_blocks = bsd_statfs->f_blocks; 405 linux_statfs->f_bfree = bsd_statfs->f_bfree; 406 linux_statfs->f_bavail = bsd_statfs->f_bavail; 407 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 408 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 409 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 410 #else 411 linux_statfs->f_ffree = bsd_statfs->f_ffree; 412 linux_statfs->f_files = bsd_statfs->f_files; 413 #endif 414 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 415 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 416 linux_statfs->f_namelen = MAXNAMLEN; 417 linux_statfs->f_frsize = bsd_statfs->f_bsize; 418 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 419 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 420 421 return (0); 422 } 423 424 int 425 linux_statfs(struct thread *td, struct linux_statfs_args *args) 426 { 427 struct l_statfs linux_statfs; 428 struct statfs *bsd_statfs; 429 int error; 430 431 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 432 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 433 if (error == 0) 434 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 435 free(bsd_statfs, M_STATFS); 436 if (error != 0) 437 return (error); 438 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 439 } 440 441 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 442 static void 443 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 444 { 445 446 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 447 linux_statfs->f_bsize = bsd_statfs->f_bsize; 448 linux_statfs->f_blocks = bsd_statfs->f_blocks; 449 linux_statfs->f_bfree = bsd_statfs->f_bfree; 450 linux_statfs->f_bavail = bsd_statfs->f_bavail; 451 linux_statfs->f_ffree = bsd_statfs->f_ffree; 452 linux_statfs->f_files = bsd_statfs->f_files; 453 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 454 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 455 linux_statfs->f_namelen = MAXNAMLEN; 456 linux_statfs->f_frsize = bsd_statfs->f_bsize; 457 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 458 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 459 } 460 461 int 462 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 463 { 464 struct l_statfs64 linux_statfs; 465 struct statfs *bsd_statfs; 466 int error; 467 468 if (args->bufsize != sizeof(struct l_statfs64)) 469 return (EINVAL); 470 471 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 472 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 473 if (error == 0) 474 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 475 free(bsd_statfs, M_STATFS); 476 if (error != 0) 477 return (error); 478 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 479 } 480 481 int 482 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 483 { 484 struct l_statfs64 linux_statfs; 485 struct statfs *bsd_statfs; 486 int error; 487 488 if (args->bufsize != sizeof(struct l_statfs64)) 489 return (EINVAL); 490 491 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 492 error = kern_fstatfs(td, args->fd, bsd_statfs); 493 if (error == 0) 494 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 495 free(bsd_statfs, M_STATFS); 496 if (error != 0) 497 return (error); 498 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 499 } 500 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 501 502 int 503 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 504 { 505 struct l_statfs linux_statfs; 506 struct statfs *bsd_statfs; 507 int error; 508 509 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 510 error = kern_fstatfs(td, args->fd, bsd_statfs); 511 if (error == 0) 512 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 513 free(bsd_statfs, M_STATFS); 514 if (error != 0) 515 return (error); 516 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 517 } 518 519 struct l_ustat 520 { 521 l_daddr_t f_tfree; 522 l_ino_t f_tinode; 523 char f_fname[6]; 524 char f_fpack[6]; 525 }; 526 527 #ifdef LINUX_LEGACY_SYSCALLS 528 int 529 linux_ustat(struct thread *td, struct linux_ustat_args *args) 530 { 531 532 return (EOPNOTSUPP); 533 } 534 #endif 535 536 /* 537 * Convert Linux stat flags to BSD flags. Return value indicates successful 538 * conversion (no unknown flags). 539 */ 540 static bool 541 linux_to_bsd_stat_flags(int linux_flags, int *out_flags) 542 { 543 int flags, unsupported; 544 545 unsupported = linux_flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 546 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 547 if (unsupported != 0) { 548 *out_flags = unsupported; 549 return (false); 550 } 551 552 flags = 0; 553 if (linux_flags & LINUX_AT_SYMLINK_NOFOLLOW) 554 flags |= AT_SYMLINK_NOFOLLOW; 555 if (linux_flags & LINUX_AT_EMPTY_PATH) 556 flags |= AT_EMPTY_PATH; 557 *out_flags = flags; 558 return (true); 559 } 560 561 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 562 563 static int 564 stat64_copyout(struct stat *buf, void *ubuf) 565 { 566 struct l_stat64 lbuf; 567 568 bzero(&lbuf, sizeof(lbuf)); 569 lbuf.st_dev = linux_new_encode_dev(buf->st_dev); 570 lbuf.st_ino = buf->st_ino; 571 lbuf.st_mode = buf->st_mode; 572 lbuf.st_nlink = buf->st_nlink; 573 lbuf.st_uid = buf->st_uid; 574 lbuf.st_gid = buf->st_gid; 575 lbuf.st_rdev = linux_new_encode_dev(buf->st_rdev); 576 lbuf.st_size = buf->st_size; 577 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 578 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 579 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 580 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 581 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 582 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 583 lbuf.st_blksize = buf->st_blksize; 584 lbuf.st_blocks = buf->st_blocks; 585 586 /* 587 * The __st_ino field makes all the difference. In the Linux kernel 588 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 589 * but without the assignment to __st_ino the runtime linker refuses 590 * to mmap(2) any shared libraries. I guess it's broken alright :-) 591 */ 592 lbuf.__st_ino = buf->st_ino; 593 594 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 595 } 596 597 int 598 linux_stat64(struct thread *td, struct linux_stat64_args *args) 599 { 600 struct stat buf; 601 int error; 602 603 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 604 if (error) 605 return (error); 606 return (stat64_copyout(&buf, args->statbuf)); 607 } 608 609 int 610 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 611 { 612 struct stat sb; 613 int error; 614 615 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 616 if (error) 617 return (error); 618 return (stat64_copyout(&sb, args->statbuf)); 619 } 620 621 int 622 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 623 { 624 struct stat buf; 625 int error; 626 627 error = linux_kern_fstat(td, args->fd, &buf); 628 if (!error) 629 error = stat64_copyout(&buf, args->statbuf); 630 631 return (error); 632 } 633 634 int 635 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 636 { 637 int error, dfd, flags; 638 struct stat buf; 639 640 if (!linux_to_bsd_stat_flags(args->flag, &flags)) { 641 linux_msg(td, "fstatat64 unsupported flags 0x%x", flags); 642 return (EINVAL); 643 } 644 645 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 646 error = linux_kern_statat(td, flags, dfd, args->pathname, 647 UIO_USERSPACE, &buf); 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 int error, dfd, flags; 660 struct stat buf; 661 662 if (!linux_to_bsd_stat_flags(args->flag, &flags)) { 663 linux_msg(td, "fstatat unsupported flags 0x%x", flags); 664 return (EINVAL); 665 } 666 667 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 668 error = linux_kern_statat(td, flags, dfd, args->pathname, 669 UIO_USERSPACE, &buf); 670 if (error == 0) 671 error = newstat_copyout(&buf, args->statbuf); 672 673 return (error); 674 } 675 676 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 677 678 int 679 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 680 { 681 struct mount *mp; 682 struct vnode *vp; 683 int error, save; 684 685 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 686 if (error != 0) 687 /* 688 * Linux syncfs() returns only EBADF, however fgetvp() 689 * can return EINVAL in case of file descriptor does 690 * not represent a vnode. XXX. 691 */ 692 return (error); 693 694 mp = vp->v_mount; 695 mtx_lock(&mountlist_mtx); 696 error = vfs_busy(mp, MBF_MNTLSTLOCK); 697 if (error != 0) { 698 /* See comment above. */ 699 mtx_unlock(&mountlist_mtx); 700 goto out; 701 } 702 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 703 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 704 save = curthread_pflags_set(TDP_SYNCIO); 705 vfs_periodic(mp, MNT_NOWAIT); 706 VFS_SYNC(mp, MNT_NOWAIT); 707 curthread_pflags_restore(save); 708 vn_finished_write(mp); 709 } 710 vfs_unbusy(mp); 711 712 out: 713 vrele(vp); 714 return (error); 715 } 716 717 static int 718 statx_copyout(struct stat *buf, void *ubuf) 719 { 720 struct l_statx tbuf; 721 722 bzero(&tbuf, sizeof(tbuf)); 723 tbuf.stx_mask = STATX_ALL; 724 tbuf.stx_blksize = buf->st_blksize; 725 tbuf.stx_attributes = 0; 726 tbuf.stx_nlink = buf->st_nlink; 727 tbuf.stx_uid = buf->st_uid; 728 tbuf.stx_gid = buf->st_gid; 729 tbuf.stx_mode = buf->st_mode; 730 tbuf.stx_ino = buf->st_ino; 731 tbuf.stx_size = buf->st_size; 732 tbuf.stx_blocks = buf->st_blocks; 733 734 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 735 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 736 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 737 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 738 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 739 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 740 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 741 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 742 tbuf.stx_rdev_major = linux_encode_major(buf->st_rdev); 743 tbuf.stx_rdev_minor = linux_encode_minor(buf->st_rdev); 744 tbuf.stx_dev_major = linux_encode_major(buf->st_dev); 745 tbuf.stx_dev_minor = linux_encode_minor(buf->st_dev); 746 747 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 748 } 749 750 int 751 linux_statx(struct thread *td, struct linux_statx_args *args) 752 { 753 int error, dirfd, flags; 754 struct stat buf; 755 756 if (!linux_to_bsd_stat_flags(args->flags, &flags)) { 757 linux_msg(td, "statx unsupported flags 0x%x", flags); 758 return (EINVAL); 759 } 760 761 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 762 error = linux_kern_statat(td, flags, dirfd, args->pathname, 763 UIO_USERSPACE, &buf); 764 if (error == 0) 765 error = statx_copyout(&buf, args->statxbuf); 766 767 return (error); 768 } 769