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 <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/proc.h> 39 #include <sys/stat.h> 40 #include <sys/syscallsubr.h> 41 #include <sys/tty.h> 42 #include <sys/vnode.h> 43 44 #ifdef COMPAT_LINUX32 45 #include <machine/../linux32/linux.h> 46 #include <machine/../linux32/linux32_proto.h> 47 #else 48 #include <machine/../linux/linux.h> 49 #include <machine/../linux/linux_proto.h> 50 #endif 51 52 #include <compat/linux/linux_util.h> 53 #include <compat/linux/linux_file.h> 54 55 static void 56 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 57 { 58 int major, minor; 59 60 if (vn_isdisk(vp)) { 61 sb->st_mode &= ~S_IFMT; 62 sb->st_mode |= S_IFBLK; 63 } 64 65 /* 66 * Return the same st_dev for every devfs instance. The reason 67 * for this is to work around an idiosyncrasy of glibc getttynam() 68 * implementation: it checks whether st_dev returned for fd 0 69 * is the same as st_dev returned for the target of /proc/self/fd/0 70 * symlink, and with linux chroots having their own devfs instance, 71 * the check will fail if you chroot into it. 72 */ 73 if (rootdevmp != NULL && vp->v_mount->mnt_vfc == rootdevmp->mnt_vfc) 74 sb->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 75 76 if (linux_vn_get_major_minor(vp, &major, &minor) == 0) 77 sb->st_rdev = (major << 8 | minor); 78 } 79 80 static int 81 linux_kern_statat(struct thread *td, int flag, int fd, const char *path, 82 enum uio_seg pathseg, struct stat *sbp) 83 { 84 85 return (kern_statat(td, flag, fd, path, pathseg, sbp, 86 translate_vnhook_major_minor)); 87 } 88 89 #ifdef LINUX_LEGACY_SYSCALLS 90 static int 91 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 92 struct stat *sbp) 93 { 94 95 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 96 } 97 98 static int 99 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 100 struct stat *sbp) 101 { 102 103 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 104 pathseg, sbp)); 105 } 106 #endif 107 108 static void 109 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 110 { 111 struct file *fp; 112 struct vnode *vp; 113 struct mount *mp; 114 int major, minor; 115 116 /* 117 * No capability rights required here. 118 */ 119 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 120 fget(td, fd, &cap_no_rights, &fp) != 0) 121 return; 122 vp = fp->f_vnode; 123 if (vp != NULL && vn_isdisk(vp)) { 124 buf->st_mode &= ~S_IFMT; 125 buf->st_mode |= S_IFBLK; 126 } 127 if (vp != NULL && rootdevmp != NULL) { 128 mp = vp->v_mount; 129 __compiler_membar(); 130 if (mp != NULL && mp->mnt_vfc == rootdevmp->mnt_vfc) 131 buf->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 132 } 133 if (linux_vn_get_major_minor(vp, &major, &minor) == 0) { 134 buf->st_rdev = (major << 8 | minor); 135 } else if (fp->f_type == DTYPE_PTS) { 136 struct tty *tp = fp->f_data; 137 138 /* Convert the numbers for the slave device. */ 139 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 140 &major, &minor) == 0) { 141 buf->st_rdev = (major << 8 | minor); 142 } 143 } 144 fdrop(fp, td); 145 } 146 147 /* 148 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so 149 * truncation of a dev_t to 16 bits gives the same result as unpacking 150 * using major() and minor() and repacking in the l_dev_t format. This 151 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's 152 * are not checked for, as for other fields. 153 * 154 * dev_to_ldev() is only used for translating st_dev. When we convert 155 * st_rdev for copying it out, it isn't really a dev_t, but has already 156 * been translated to an l_dev_t in a nontrivial way. Translating it 157 * again would be illogical but would have no effect since the low 16 158 * bits have the same encoding. 159 * 160 * The nontrivial translation for st_rdev renumbers some devices, but not 161 * ones that can be mounted on, so it is consistent with the translation 162 * for st_dev except when the renumbering or truncation causes conflicts. 163 */ 164 #define dev_to_ldev(d) ((uint16_t)(d)) 165 166 static int 167 newstat_copyout(struct stat *buf, void *ubuf) 168 { 169 struct l_newstat tbuf; 170 171 bzero(&tbuf, sizeof(tbuf)); 172 tbuf.st_dev = dev_to_ldev(buf->st_dev); 173 tbuf.st_ino = buf->st_ino; 174 tbuf.st_mode = buf->st_mode; 175 tbuf.st_nlink = buf->st_nlink; 176 tbuf.st_uid = buf->st_uid; 177 tbuf.st_gid = buf->st_gid; 178 tbuf.st_rdev = buf->st_rdev; 179 tbuf.st_size = buf->st_size; 180 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 181 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 182 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 183 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 184 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 185 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 186 tbuf.st_blksize = buf->st_blksize; 187 tbuf.st_blocks = buf->st_blocks; 188 189 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 190 } 191 192 static int 193 statx_copyout(struct stat *buf, void *ubuf) 194 { 195 struct l_statx tbuf; 196 197 bzero(&tbuf, sizeof(tbuf)); 198 tbuf.stx_mask = STATX_ALL; 199 tbuf.stx_blksize = buf->st_blksize; 200 tbuf.stx_attributes = 0; 201 tbuf.stx_nlink = buf->st_nlink; 202 tbuf.stx_uid = buf->st_uid; 203 tbuf.stx_gid = buf->st_gid; 204 tbuf.stx_mode = buf->st_mode; 205 tbuf.stx_ino = buf->st_ino; 206 tbuf.stx_size = buf->st_size; 207 tbuf.stx_blocks = buf->st_blocks; 208 209 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 210 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 211 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 212 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 213 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 214 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 215 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 216 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 217 218 tbuf.stx_rdev_major = buf->st_rdev >> 8; 219 tbuf.stx_rdev_minor = buf->st_rdev & 0xff; 220 tbuf.stx_dev_major = buf->st_dev >> 8; 221 tbuf.stx_dev_minor = buf->st_dev & 0xff; 222 223 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 224 } 225 226 #ifdef LINUX_LEGACY_SYSCALLS 227 int 228 linux_newstat(struct thread *td, struct linux_newstat_args *args) 229 { 230 struct stat buf; 231 char *path; 232 int error; 233 234 if (!LUSECONVPATH(td)) { 235 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 236 } else { 237 LCONVPATHEXIST(args->path, &path); 238 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 239 LFREEPATH(path); 240 } 241 if (error) 242 return (error); 243 return (newstat_copyout(&buf, args->buf)); 244 } 245 246 int 247 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 248 { 249 struct stat sb; 250 char *path; 251 int error; 252 253 if (!LUSECONVPATH(td)) { 254 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 255 } else { 256 LCONVPATHEXIST(args->path, &path); 257 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 258 LFREEPATH(path); 259 } 260 if (error) 261 return (error); 262 return (newstat_copyout(&sb, args->buf)); 263 } 264 #endif 265 266 int 267 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 268 { 269 struct stat buf; 270 int error; 271 272 error = kern_fstat(td, args->fd, &buf); 273 translate_fd_major_minor(td, args->fd, &buf); 274 if (!error) 275 error = newstat_copyout(&buf, args->buf); 276 277 return (error); 278 } 279 280 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 281 static int 282 stat_copyout(struct stat *buf, void *ubuf) 283 { 284 struct l_stat lbuf; 285 286 bzero(&lbuf, sizeof(lbuf)); 287 lbuf.st_dev = dev_to_ldev(buf->st_dev); 288 lbuf.st_ino = buf->st_ino; 289 lbuf.st_mode = buf->st_mode; 290 lbuf.st_nlink = buf->st_nlink; 291 lbuf.st_uid = buf->st_uid; 292 lbuf.st_gid = buf->st_gid; 293 lbuf.st_rdev = buf->st_rdev; 294 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 295 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 296 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 297 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 298 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 299 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 300 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 301 lbuf.st_blksize = buf->st_blksize; 302 lbuf.st_blocks = buf->st_blocks; 303 lbuf.st_flags = buf->st_flags; 304 lbuf.st_gen = buf->st_gen; 305 306 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 307 } 308 309 int 310 linux_stat(struct thread *td, struct linux_stat_args *args) 311 { 312 struct stat buf; 313 char *path; 314 int error; 315 316 if (!LUSECONVPATH(td)) { 317 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 318 } else { 319 LCONVPATHEXIST(args->path, &path); 320 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 321 LFREEPATH(path); 322 } 323 if (error) { 324 return (error); 325 } 326 return (stat_copyout(&buf, args->up)); 327 } 328 329 int 330 linux_lstat(struct thread *td, struct linux_lstat_args *args) 331 { 332 struct stat buf; 333 char *path; 334 int error; 335 336 if (!LUSECONVPATH(td)) { 337 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 338 } else { 339 LCONVPATHEXIST(args->path, &path); 340 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 341 LFREEPATH(path); 342 } 343 if (error) { 344 return (error); 345 } 346 return (stat_copyout(&buf, args->up)); 347 } 348 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 349 350 struct l_statfs { 351 l_long f_type; 352 l_long f_bsize; 353 l_long f_blocks; 354 l_long f_bfree; 355 l_long f_bavail; 356 l_long f_files; 357 l_long f_ffree; 358 l_fsid_t f_fsid; 359 l_long f_namelen; 360 l_long f_frsize; 361 l_long f_flags; 362 l_long f_spare[4]; 363 }; 364 365 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 366 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 367 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 368 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 369 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 370 #define LINUX_NCP_SUPER_MAGIC 0x564cL 371 #define LINUX_NFS_SUPER_MAGIC 0x6969L 372 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 373 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 374 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 375 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 376 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 377 #define LINUX_SHMFS_MAGIC 0x01021994 378 379 static long 380 bsd_to_linux_ftype(const char *fstypename) 381 { 382 int i; 383 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 384 {"ufs", LINUX_UFS_SUPER_MAGIC}, 385 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 386 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 387 {"nfs", LINUX_NFS_SUPER_MAGIC}, 388 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 389 {"procfs", LINUX_PROC_SUPER_MAGIC}, 390 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 391 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 392 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 393 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 394 {"coda", LINUX_CODA_SUPER_MAGIC}, 395 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 396 {"tmpfs", LINUX_SHMFS_MAGIC}, 397 {NULL, 0L}}; 398 399 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 400 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 401 return (b2l_tbl[i].linux_type); 402 403 return (0L); 404 } 405 406 static int 407 bsd_to_linux_mnt_flags(int f_flags) 408 { 409 int flags = LINUX_ST_VALID; 410 411 if (f_flags & MNT_RDONLY) 412 flags |= LINUX_ST_RDONLY; 413 if (f_flags & MNT_NOEXEC) 414 flags |= LINUX_ST_NOEXEC; 415 if (f_flags & MNT_NOSUID) 416 flags |= LINUX_ST_NOSUID; 417 if (f_flags & MNT_NOATIME) 418 flags |= LINUX_ST_NOATIME; 419 if (f_flags & MNT_NOSYMFOLLOW) 420 flags |= LINUX_ST_NOSYMFOLLOW; 421 if (f_flags & MNT_SYNCHRONOUS) 422 flags |= LINUX_ST_SYNCHRONOUS; 423 424 return (flags); 425 } 426 427 static int 428 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 429 { 430 431 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 432 statfs_scale_blocks(bsd_statfs, INT32_MAX); 433 #endif 434 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 435 linux_statfs->f_bsize = bsd_statfs->f_bsize; 436 linux_statfs->f_blocks = bsd_statfs->f_blocks; 437 linux_statfs->f_bfree = bsd_statfs->f_bfree; 438 linux_statfs->f_bavail = bsd_statfs->f_bavail; 439 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 440 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 441 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 442 #else 443 linux_statfs->f_ffree = bsd_statfs->f_ffree; 444 linux_statfs->f_files = bsd_statfs->f_files; 445 #endif 446 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 447 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 448 linux_statfs->f_namelen = MAXNAMLEN; 449 linux_statfs->f_frsize = bsd_statfs->f_bsize; 450 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 451 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 452 453 return (0); 454 } 455 456 int 457 linux_statfs(struct thread *td, struct linux_statfs_args *args) 458 { 459 struct l_statfs linux_statfs; 460 struct statfs *bsd_statfs; 461 char *path; 462 int error; 463 464 if (!LUSECONVPATH(td)) { 465 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 466 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 467 } else { 468 LCONVPATHEXIST(args->path, &path); 469 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 470 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 471 LFREEPATH(path); 472 } 473 if (error == 0) 474 error = bsd_to_linux_statfs(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 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 482 static void 483 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 484 { 485 486 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 487 linux_statfs->f_bsize = bsd_statfs->f_bsize; 488 linux_statfs->f_blocks = bsd_statfs->f_blocks; 489 linux_statfs->f_bfree = bsd_statfs->f_bfree; 490 linux_statfs->f_bavail = bsd_statfs->f_bavail; 491 linux_statfs->f_ffree = bsd_statfs->f_ffree; 492 linux_statfs->f_files = bsd_statfs->f_files; 493 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 494 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 495 linux_statfs->f_namelen = MAXNAMLEN; 496 linux_statfs->f_frsize = bsd_statfs->f_bsize; 497 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 498 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 499 } 500 501 int 502 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 503 { 504 struct l_statfs64 linux_statfs; 505 struct statfs *bsd_statfs; 506 char *path; 507 int error; 508 509 if (args->bufsize != sizeof(struct l_statfs64)) 510 return (EINVAL); 511 512 if (!LUSECONVPATH(td)) { 513 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 514 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 515 } else { 516 LCONVPATHEXIST(args->path, &path); 517 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 518 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 519 LFREEPATH(path); 520 } 521 if (error == 0) 522 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 523 free(bsd_statfs, M_STATFS); 524 if (error != 0) 525 return (error); 526 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 527 } 528 529 int 530 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 531 { 532 struct l_statfs64 linux_statfs; 533 struct statfs *bsd_statfs; 534 int error; 535 536 if (args->bufsize != sizeof(struct l_statfs64)) 537 return (EINVAL); 538 539 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 540 error = kern_fstatfs(td, args->fd, bsd_statfs); 541 if (error == 0) 542 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 543 free(bsd_statfs, M_STATFS); 544 if (error != 0) 545 return (error); 546 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 547 } 548 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 549 550 int 551 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 552 { 553 struct l_statfs linux_statfs; 554 struct statfs *bsd_statfs; 555 int error; 556 557 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 558 error = kern_fstatfs(td, args->fd, bsd_statfs); 559 if (error == 0) 560 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 561 free(bsd_statfs, M_STATFS); 562 if (error != 0) 563 return (error); 564 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 565 } 566 567 struct l_ustat 568 { 569 l_daddr_t f_tfree; 570 l_ino_t f_tinode; 571 char f_fname[6]; 572 char f_fpack[6]; 573 }; 574 575 #ifdef LINUX_LEGACY_SYSCALLS 576 int 577 linux_ustat(struct thread *td, struct linux_ustat_args *args) 578 { 579 580 return (EOPNOTSUPP); 581 } 582 #endif 583 584 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 585 586 static int 587 stat64_copyout(struct stat *buf, void *ubuf) 588 { 589 struct l_stat64 lbuf; 590 591 bzero(&lbuf, sizeof(lbuf)); 592 lbuf.st_dev = dev_to_ldev(buf->st_dev); 593 lbuf.st_ino = buf->st_ino; 594 lbuf.st_mode = buf->st_mode; 595 lbuf.st_nlink = buf->st_nlink; 596 lbuf.st_uid = buf->st_uid; 597 lbuf.st_gid = buf->st_gid; 598 lbuf.st_rdev = buf->st_rdev; 599 lbuf.st_size = buf->st_size; 600 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 601 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 602 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 603 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 604 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 605 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 606 lbuf.st_blksize = buf->st_blksize; 607 lbuf.st_blocks = buf->st_blocks; 608 609 /* 610 * The __st_ino field makes all the difference. In the Linux kernel 611 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 612 * but without the assignment to __st_ino the runtime linker refuses 613 * to mmap(2) any shared libraries. I guess it's broken alright :-) 614 */ 615 lbuf.__st_ino = buf->st_ino; 616 617 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 618 } 619 620 int 621 linux_stat64(struct thread *td, struct linux_stat64_args *args) 622 { 623 struct stat buf; 624 char *filename; 625 int error; 626 627 if (!LUSECONVPATH(td)) { 628 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 629 } else { 630 LCONVPATHEXIST(args->filename, &filename); 631 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 632 LFREEPATH(filename); 633 } 634 if (error) 635 return (error); 636 return (stat64_copyout(&buf, args->statbuf)); 637 } 638 639 int 640 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 641 { 642 struct stat sb; 643 char *filename; 644 int error; 645 646 if (!LUSECONVPATH(td)) { 647 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 648 } else { 649 LCONVPATHEXIST(args->filename, &filename); 650 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 651 LFREEPATH(filename); 652 } 653 if (error) 654 return (error); 655 return (stat64_copyout(&sb, args->statbuf)); 656 } 657 658 int 659 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 660 { 661 struct stat buf; 662 int error; 663 664 error = kern_fstat(td, args->fd, &buf); 665 translate_fd_major_minor(td, args->fd, &buf); 666 if (!error) 667 error = stat64_copyout(&buf, args->statbuf); 668 669 return (error); 670 } 671 672 int 673 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 674 { 675 char *path; 676 int error, dfd, flag, unsupported; 677 struct stat buf; 678 679 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 680 if (unsupported != 0) { 681 linux_msg(td, "fstatat64 unsupported flag 0x%x", unsupported); 682 return (EINVAL); 683 } 684 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 685 AT_SYMLINK_NOFOLLOW : 0; 686 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 687 AT_EMPTY_PATH : 0; 688 689 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 690 if (!LUSECONVPATH(td)) { 691 error = linux_kern_statat(td, flag, dfd, args->pathname, 692 UIO_USERSPACE, &buf); 693 } else { 694 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 695 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 696 LFREEPATH(path); 697 } 698 if (error == 0) 699 error = stat64_copyout(&buf, args->statbuf); 700 701 return (error); 702 } 703 704 #else /* __amd64__ && !COMPAT_LINUX32 */ 705 706 int 707 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 708 { 709 char *path; 710 int error, dfd, flag, unsupported; 711 struct stat buf; 712 713 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 714 if (unsupported != 0) { 715 linux_msg(td, "fstatat unsupported flag 0x%x", unsupported); 716 return (EINVAL); 717 } 718 719 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 720 AT_SYMLINK_NOFOLLOW : 0; 721 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 722 AT_EMPTY_PATH : 0; 723 724 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 725 if (!LUSECONVPATH(td)) { 726 error = linux_kern_statat(td, flag, dfd, args->pathname, 727 UIO_USERSPACE, &buf); 728 } else { 729 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 730 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 731 LFREEPATH(path); 732 } 733 if (error == 0) 734 error = newstat_copyout(&buf, args->statbuf); 735 736 return (error); 737 } 738 739 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 740 741 int 742 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 743 { 744 struct mount *mp; 745 struct vnode *vp; 746 int error, save; 747 748 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 749 if (error != 0) 750 /* 751 * Linux syncfs() returns only EBADF, however fgetvp() 752 * can return EINVAL in case of file descriptor does 753 * not represent a vnode. XXX. 754 */ 755 return (error); 756 757 mp = vp->v_mount; 758 mtx_lock(&mountlist_mtx); 759 error = vfs_busy(mp, MBF_MNTLSTLOCK); 760 if (error != 0) { 761 /* See comment above. */ 762 mtx_unlock(&mountlist_mtx); 763 goto out; 764 } 765 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 766 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 767 save = curthread_pflags_set(TDP_SYNCIO); 768 vfs_periodic(mp, MNT_NOWAIT); 769 VFS_SYNC(mp, MNT_NOWAIT); 770 curthread_pflags_restore(save); 771 vn_finished_write(mp); 772 } 773 vfs_unbusy(mp); 774 775 out: 776 vrele(vp); 777 return (error); 778 } 779 780 int 781 linux_statx(struct thread *td, struct linux_statx_args *args) 782 { 783 char *path; 784 int error, dirfd, flags, unsupported; 785 struct stat buf; 786 787 unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 788 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 789 if (unsupported != 0) { 790 linux_msg(td, "statx unsupported flags 0x%x", unsupported); 791 return (EINVAL); 792 } 793 794 flags = (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) ? 795 AT_SYMLINK_NOFOLLOW : 0; 796 flags |= (args->flags & LINUX_AT_EMPTY_PATH) ? 797 AT_EMPTY_PATH : 0; 798 799 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 800 if (!LUSECONVPATH(td)) { 801 error = linux_kern_statat(td, flags, dirfd, args->pathname, 802 UIO_USERSPACE, &buf); 803 } else { 804 LCONVPATHEXIST_AT(args->pathname, &path, dirfd); 805 error = linux_kern_statat(td, flags, dirfd, path, UIO_SYSSPACE, &buf); 806 LFREEPATH(path); 807 } 808 if (error == 0) 809 error = statx_copyout(&buf, args->statxbuf); 810 811 return (error); 812 } 813