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sys/compat/linux/linux_stats.c
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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_compat.h" 33 34 #include <sys/param.h> 35 #include <sys/capsicum.h> 36 #include <sys/dirent.h> 37 #include <sys/file.h> 38 #include <sys/filedesc.h> 39 #include <sys/proc.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/stat.h> 44 #include <sys/syscallsubr.h> 45 #include <sys/systm.h> 46 #include <sys/tty.h> 47 #include <sys/vnode.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 51 #ifdef COMPAT_LINUX32 52 #include <machine/../linux32/linux.h> 53 #include <machine/../linux32/linux32_proto.h> 54 #else 55 #include <machine/../linux/linux.h> 56 #include <machine/../linux/linux_proto.h> 57 #endif 58 59 #include <compat/linux/linux_util.h> 60 #include <compat/linux/linux_file.h> 61 62 static void 63 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 64 { 65 int major, minor; 66 67 if (vn_isdisk(vp)) { 68 sb->st_mode &= ~S_IFMT; 69 sb->st_mode |= S_IFBLK; 70 } 71 72 /* 73 * Return the same st_dev for every devfs instance. The reason 74 * for this is to work around an idiosyncrasy of glibc getttynam() 75 * implementation: it checks whether st_dev returned for fd 0 76 * is the same as st_dev returned for the target of /proc/self/fd/0 77 * symlink, and with linux chroots having their own devfs instance, 78 * the check will fail if you chroot into it. 79 */ 80 if (rootdevmp != NULL && vp->v_mount->mnt_vfc == rootdevmp->mnt_vfc) 81 sb->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 82 83 if (linux_vn_get_major_minor(vp, &major, &minor) == 0) 84 sb->st_rdev = (major << 8 | minor); 85 } 86 87 static int 88 linux_kern_statat(struct thread *td, int flag, int fd, const char *path, 89 enum uio_seg pathseg, struct stat *sbp) 90 { 91 92 return (kern_statat(td, flag, fd, path, pathseg, sbp, 93 translate_vnhook_major_minor)); 94 } 95 96 #ifdef LINUX_LEGACY_SYSCALLS 97 static int 98 linux_kern_stat(struct thread *td, const char *path, enum uio_seg pathseg, 99 struct stat *sbp) 100 { 101 102 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 103 } 104 105 static int 106 linux_kern_lstat(struct thread *td, const char *path, enum uio_seg pathseg, 107 struct stat *sbp) 108 { 109 110 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 111 pathseg, sbp)); 112 } 113 #endif 114 115 static void 116 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 117 { 118 struct file *fp; 119 struct vnode *vp; 120 struct mount *mp; 121 int major, minor; 122 123 /* 124 * No capability rights required here. 125 */ 126 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 127 fget(td, fd, &cap_no_rights, &fp) != 0) 128 return; 129 vp = fp->f_vnode; 130 if (vp != NULL && vn_isdisk(vp)) { 131 buf->st_mode &= ~S_IFMT; 132 buf->st_mode |= S_IFBLK; 133 } 134 if (vp != NULL && rootdevmp != NULL) { 135 mp = vp->v_mount; 136 __compiler_membar(); 137 if (mp != NULL && mp->mnt_vfc == rootdevmp->mnt_vfc) 138 buf->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 139 } 140 if (linux_vn_get_major_minor(vp, &major, &minor) == 0) { 141 buf->st_rdev = (major << 8 | minor); 142 } else if (fp->f_type == DTYPE_PTS) { 143 struct tty *tp = fp->f_data; 144 145 /* Convert the numbers for the slave device. */ 146 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 147 &major, &minor) == 0) { 148 buf->st_rdev = (major << 8 | minor); 149 } 150 } 151 fdrop(fp, td); 152 } 153 154 /* 155 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so 156 * truncation of a dev_t to 16 bits gives the same result as unpacking 157 * using major() and minor() and repacking in the l_dev_t format. This 158 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's 159 * are not checked for, as for other fields. 160 * 161 * dev_to_ldev() is only used for translating st_dev. When we convert 162 * st_rdev for copying it out, it isn't really a dev_t, but has already 163 * been translated to an l_dev_t in a nontrivial way. Translating it 164 * again would be illogical but would have no effect since the low 16 165 * bits have the same encoding. 166 * 167 * The nontrivial translation for st_rdev renumbers some devices, but not 168 * ones that can be mounted on, so it is consistent with the translation 169 * for st_dev except when the renumbering or truncation causes conflicts. 170 */ 171 #define dev_to_ldev(d) ((uint16_t)(d)) 172 173 static int 174 newstat_copyout(struct stat *buf, void *ubuf) 175 { 176 struct l_newstat tbuf; 177 178 bzero(&tbuf, sizeof(tbuf)); 179 tbuf.st_dev = dev_to_ldev(buf->st_dev); 180 tbuf.st_ino = buf->st_ino; 181 tbuf.st_mode = buf->st_mode; 182 tbuf.st_nlink = buf->st_nlink; 183 tbuf.st_uid = buf->st_uid; 184 tbuf.st_gid = buf->st_gid; 185 tbuf.st_rdev = buf->st_rdev; 186 tbuf.st_size = buf->st_size; 187 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 188 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 189 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 190 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 191 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 192 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 193 tbuf.st_blksize = buf->st_blksize; 194 tbuf.st_blocks = buf->st_blocks; 195 196 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 197 } 198 199 static int 200 statx_copyout(struct stat *buf, void *ubuf) 201 { 202 struct l_statx tbuf; 203 204 bzero(&tbuf, sizeof(tbuf)); 205 tbuf.stx_mask = STATX_ALL; 206 tbuf.stx_blksize = buf->st_blksize; 207 tbuf.stx_attributes = 0; 208 tbuf.stx_nlink = buf->st_nlink; 209 tbuf.stx_uid = buf->st_uid; 210 tbuf.stx_gid = buf->st_gid; 211 tbuf.stx_mode = buf->st_mode; 212 tbuf.stx_ino = buf->st_ino; 213 tbuf.stx_size = buf->st_size; 214 tbuf.stx_blocks = buf->st_blocks; 215 216 tbuf.stx_atime.tv_sec = buf->st_atim.tv_sec; 217 tbuf.stx_atime.tv_nsec = buf->st_atim.tv_nsec; 218 tbuf.stx_btime.tv_sec = buf->st_birthtim.tv_sec; 219 tbuf.stx_btime.tv_nsec = buf->st_birthtim.tv_nsec; 220 tbuf.stx_ctime.tv_sec = buf->st_ctim.tv_sec; 221 tbuf.stx_ctime.tv_nsec = buf->st_ctim.tv_nsec; 222 tbuf.stx_mtime.tv_sec = buf->st_mtim.tv_sec; 223 tbuf.stx_mtime.tv_nsec = buf->st_mtim.tv_nsec; 224 225 tbuf.stx_rdev_major = buf->st_rdev >> 8; 226 tbuf.stx_rdev_minor = buf->st_rdev & 0xff; 227 tbuf.stx_dev_major = buf->st_dev >> 8; 228 tbuf.stx_dev_minor = buf->st_dev & 0xff; 229 230 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 231 } 232 233 #ifdef LINUX_LEGACY_SYSCALLS 234 int 235 linux_newstat(struct thread *td, struct linux_newstat_args *args) 236 { 237 struct stat buf; 238 char *path; 239 int error; 240 241 if (!LUSECONVPATH(td)) { 242 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 243 } else { 244 LCONVPATHEXIST(args->path, &path); 245 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 246 LFREEPATH(path); 247 } 248 if (error) 249 return (error); 250 return (newstat_copyout(&buf, args->buf)); 251 } 252 253 int 254 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 255 { 256 struct stat sb; 257 char *path; 258 int error; 259 260 if (!LUSECONVPATH(td)) { 261 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &sb); 262 } else { 263 LCONVPATHEXIST(args->path, &path); 264 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 265 LFREEPATH(path); 266 } 267 if (error) 268 return (error); 269 return (newstat_copyout(&sb, args->buf)); 270 } 271 #endif 272 273 int 274 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 275 { 276 struct stat buf; 277 int error; 278 279 error = kern_fstat(td, args->fd, &buf); 280 translate_fd_major_minor(td, args->fd, &buf); 281 if (!error) 282 error = newstat_copyout(&buf, args->buf); 283 284 return (error); 285 } 286 287 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 288 static int 289 stat_copyout(struct stat *buf, void *ubuf) 290 { 291 struct l_stat lbuf; 292 293 bzero(&lbuf, sizeof(lbuf)); 294 lbuf.st_dev = dev_to_ldev(buf->st_dev); 295 lbuf.st_ino = buf->st_ino; 296 lbuf.st_mode = buf->st_mode; 297 lbuf.st_nlink = buf->st_nlink; 298 lbuf.st_uid = buf->st_uid; 299 lbuf.st_gid = buf->st_gid; 300 lbuf.st_rdev = buf->st_rdev; 301 lbuf.st_size = MIN(buf->st_size, INT32_MAX); 302 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 303 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 304 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 305 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 306 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 307 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 308 lbuf.st_blksize = buf->st_blksize; 309 lbuf.st_blocks = buf->st_blocks; 310 lbuf.st_flags = buf->st_flags; 311 lbuf.st_gen = buf->st_gen; 312 313 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 314 } 315 316 int 317 linux_stat(struct thread *td, struct linux_stat_args *args) 318 { 319 struct stat buf; 320 char *path; 321 int error; 322 323 if (!LUSECONVPATH(td)) { 324 error = linux_kern_stat(td, args->path, UIO_USERSPACE, &buf); 325 } else { 326 LCONVPATHEXIST(args->path, &path); 327 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 328 LFREEPATH(path); 329 } 330 if (error) { 331 return (error); 332 } 333 return (stat_copyout(&buf, args->up)); 334 } 335 336 int 337 linux_lstat(struct thread *td, struct linux_lstat_args *args) 338 { 339 struct stat buf; 340 char *path; 341 int error; 342 343 if (!LUSECONVPATH(td)) { 344 error = linux_kern_lstat(td, args->path, UIO_USERSPACE, &buf); 345 } else { 346 LCONVPATHEXIST(args->path, &path); 347 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 348 LFREEPATH(path); 349 } 350 if (error) { 351 return (error); 352 } 353 return (stat_copyout(&buf, args->up)); 354 } 355 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 356 357 struct l_statfs { 358 l_long f_type; 359 l_long f_bsize; 360 l_long f_blocks; 361 l_long f_bfree; 362 l_long f_bavail; 363 l_long f_files; 364 l_long f_ffree; 365 l_fsid_t f_fsid; 366 l_long f_namelen; 367 l_long f_frsize; 368 l_long f_flags; 369 l_long f_spare[4]; 370 }; 371 372 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 373 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 374 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 375 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 376 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 377 #define LINUX_NCP_SUPER_MAGIC 0x564cL 378 #define LINUX_NFS_SUPER_MAGIC 0x6969L 379 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 380 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 381 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 382 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 383 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 384 #define LINUX_SHMFS_MAGIC 0x01021994 385 386 static long 387 bsd_to_linux_ftype(const char *fstypename) 388 { 389 int i; 390 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 391 {"ufs", LINUX_UFS_SUPER_MAGIC}, 392 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 393 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 394 {"nfs", LINUX_NFS_SUPER_MAGIC}, 395 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 396 {"procfs", LINUX_PROC_SUPER_MAGIC}, 397 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 398 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 399 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 400 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 401 {"coda", LINUX_CODA_SUPER_MAGIC}, 402 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 403 {"tmpfs", LINUX_SHMFS_MAGIC}, 404 {NULL, 0L}}; 405 406 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 407 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 408 return (b2l_tbl[i].linux_type); 409 410 return (0L); 411 } 412 413 static int 414 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 415 { 416 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 417 uint64_t tmp; 418 419 #define LINUX_HIBITS 0xffffffff00000000ULL 420 421 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 422 bsd_statfs->f_bsize; 423 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 424 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 425 (tmp & LINUX_HIBITS)) 426 return (EOVERFLOW); 427 #undef LINUX_HIBITS 428 #endif 429 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 430 linux_statfs->f_bsize = bsd_statfs->f_bsize; 431 linux_statfs->f_blocks = bsd_statfs->f_blocks; 432 linux_statfs->f_bfree = bsd_statfs->f_bfree; 433 linux_statfs->f_bavail = bsd_statfs->f_bavail; 434 linux_statfs->f_ffree = bsd_statfs->f_ffree; 435 linux_statfs->f_files = bsd_statfs->f_files; 436 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 437 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 438 linux_statfs->f_namelen = MAXNAMLEN; 439 linux_statfs->f_frsize = bsd_statfs->f_bsize; 440 linux_statfs->f_flags = 0; 441 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 442 443 return (0); 444 } 445 446 int 447 linux_statfs(struct thread *td, struct linux_statfs_args *args) 448 { 449 struct l_statfs linux_statfs; 450 struct statfs *bsd_statfs; 451 char *path; 452 int error; 453 454 if (!LUSECONVPATH(td)) { 455 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 456 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 457 } else { 458 LCONVPATHEXIST(args->path, &path); 459 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 460 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 461 LFREEPATH(path); 462 } 463 if (error == 0) 464 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 465 free(bsd_statfs, M_STATFS); 466 if (error != 0) 467 return (error); 468 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 469 } 470 471 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 472 static void 473 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 474 { 475 476 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 477 linux_statfs->f_bsize = bsd_statfs->f_bsize; 478 linux_statfs->f_blocks = bsd_statfs->f_blocks; 479 linux_statfs->f_bfree = bsd_statfs->f_bfree; 480 linux_statfs->f_bavail = bsd_statfs->f_bavail; 481 linux_statfs->f_ffree = bsd_statfs->f_ffree; 482 linux_statfs->f_files = bsd_statfs->f_files; 483 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 484 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 485 linux_statfs->f_namelen = MAXNAMLEN; 486 linux_statfs->f_frsize = bsd_statfs->f_bsize; 487 linux_statfs->f_flags = 0; 488 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 489 } 490 491 int 492 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 493 { 494 struct l_statfs64 linux_statfs; 495 struct statfs *bsd_statfs; 496 char *path; 497 int error; 498 499 if (args->bufsize != sizeof(struct l_statfs64)) 500 return (EINVAL); 501 502 if (!LUSECONVPATH(td)) { 503 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 504 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 505 } else { 506 LCONVPATHEXIST(args->path, &path); 507 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 508 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 509 LFREEPATH(path); 510 } 511 if (error == 0) 512 bsd_to_linux_statfs64(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 int 520 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 521 { 522 struct l_statfs64 linux_statfs; 523 struct statfs *bsd_statfs; 524 int error; 525 526 if (args->bufsize != sizeof(struct l_statfs64)) 527 return (EINVAL); 528 529 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 530 error = kern_fstatfs(td, args->fd, bsd_statfs); 531 if (error == 0) 532 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 533 free(bsd_statfs, M_STATFS); 534 if (error != 0) 535 return (error); 536 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 537 } 538 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 539 540 int 541 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 542 { 543 struct l_statfs linux_statfs; 544 struct statfs *bsd_statfs; 545 int error; 546 547 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 548 error = kern_fstatfs(td, args->fd, bsd_statfs); 549 if (error == 0) 550 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 551 free(bsd_statfs, M_STATFS); 552 if (error != 0) 553 return (error); 554 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 555 } 556 557 struct l_ustat 558 { 559 l_daddr_t f_tfree; 560 l_ino_t f_tinode; 561 char f_fname[6]; 562 char f_fpack[6]; 563 }; 564 565 #ifdef LINUX_LEGACY_SYSCALLS 566 int 567 linux_ustat(struct thread *td, struct linux_ustat_args *args) 568 { 569 570 return (EOPNOTSUPP); 571 } 572 #endif 573 574 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 575 576 static int 577 stat64_copyout(struct stat *buf, void *ubuf) 578 { 579 struct l_stat64 lbuf; 580 581 bzero(&lbuf, sizeof(lbuf)); 582 lbuf.st_dev = dev_to_ldev(buf->st_dev); 583 lbuf.st_ino = buf->st_ino; 584 lbuf.st_mode = buf->st_mode; 585 lbuf.st_nlink = buf->st_nlink; 586 lbuf.st_uid = buf->st_uid; 587 lbuf.st_gid = buf->st_gid; 588 lbuf.st_rdev = buf->st_rdev; 589 lbuf.st_size = buf->st_size; 590 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 591 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 592 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 593 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 594 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 595 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 596 lbuf.st_blksize = buf->st_blksize; 597 lbuf.st_blocks = buf->st_blocks; 598 599 /* 600 * The __st_ino field makes all the difference. In the Linux kernel 601 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 602 * but without the assignment to __st_ino the runtime linker refuses 603 * to mmap(2) any shared libraries. I guess it's broken alright :-) 604 */ 605 lbuf.__st_ino = buf->st_ino; 606 607 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 608 } 609 610 int 611 linux_stat64(struct thread *td, struct linux_stat64_args *args) 612 { 613 struct stat buf; 614 char *filename; 615 int error; 616 617 if (!LUSECONVPATH(td)) { 618 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 619 } else { 620 LCONVPATHEXIST(args->filename, &filename); 621 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 622 LFREEPATH(filename); 623 } 624 if (error) 625 return (error); 626 return (stat64_copyout(&buf, args->statbuf)); 627 } 628 629 int 630 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 631 { 632 struct stat sb; 633 char *filename; 634 int error; 635 636 if (!LUSECONVPATH(td)) { 637 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 638 } else { 639 LCONVPATHEXIST(args->filename, &filename); 640 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 641 LFREEPATH(filename); 642 } 643 if (error) 644 return (error); 645 return (stat64_copyout(&sb, args->statbuf)); 646 } 647 648 int 649 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 650 { 651 struct stat buf; 652 int error; 653 654 error = kern_fstat(td, args->fd, &buf); 655 translate_fd_major_minor(td, args->fd, &buf); 656 if (!error) 657 error = stat64_copyout(&buf, args->statbuf); 658 659 return (error); 660 } 661 662 int 663 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 664 { 665 char *path; 666 int error, dfd, flag, unsupported; 667 struct stat buf; 668 669 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 670 if (unsupported != 0) { 671 linux_msg(td, "fstatat64 unsupported flag 0x%x", unsupported); 672 return (EINVAL); 673 } 674 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 675 AT_SYMLINK_NOFOLLOW : 0; 676 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 677 AT_EMPTY_PATH : 0; 678 679 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 680 if (!LUSECONVPATH(td)) { 681 error = linux_kern_statat(td, flag, dfd, args->pathname, 682 UIO_USERSPACE, &buf); 683 } else { 684 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 685 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 686 LFREEPATH(path); 687 } 688 if (error == 0) 689 error = stat64_copyout(&buf, args->statbuf); 690 691 return (error); 692 } 693 694 #else /* __amd64__ && !COMPAT_LINUX32 */ 695 696 int 697 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 698 { 699 char *path; 700 int error, dfd, flag, unsupported; 701 struct stat buf; 702 703 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 704 if (unsupported != 0) { 705 linux_msg(td, "fstatat unsupported flag 0x%x", unsupported); 706 return (EINVAL); 707 } 708 709 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 710 AT_SYMLINK_NOFOLLOW : 0; 711 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 712 AT_EMPTY_PATH : 0; 713 714 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 715 if (!LUSECONVPATH(td)) { 716 error = linux_kern_statat(td, flag, dfd, args->pathname, 717 UIO_USERSPACE, &buf); 718 } else { 719 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 720 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 721 LFREEPATH(path); 722 } 723 if (error == 0) 724 error = newstat_copyout(&buf, args->statbuf); 725 726 return (error); 727 } 728 729 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 730 731 int 732 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 733 { 734 struct mount *mp; 735 struct vnode *vp; 736 int error, save; 737 738 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 739 if (error != 0) 740 /* 741 * Linux syncfs() returns only EBADF, however fgetvp() 742 * can return EINVAL in case of file descriptor does 743 * not represent a vnode. XXX. 744 */ 745 return (error); 746 747 mp = vp->v_mount; 748 mtx_lock(&mountlist_mtx); 749 error = vfs_busy(mp, MBF_MNTLSTLOCK); 750 if (error != 0) { 751 /* See comment above. */ 752 mtx_unlock(&mountlist_mtx); 753 goto out; 754 } 755 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 756 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 757 save = curthread_pflags_set(TDP_SYNCIO); 758 vfs_periodic(mp, MNT_NOWAIT); 759 VFS_SYNC(mp, MNT_NOWAIT); 760 curthread_pflags_restore(save); 761 vn_finished_write(mp); 762 } 763 vfs_unbusy(mp); 764 765 out: 766 vrele(vp); 767 return (error); 768 } 769 770 int 771 linux_statx(struct thread *td, struct linux_statx_args *args) 772 { 773 char *path; 774 int error, dirfd, flags, unsupported; 775 struct stat buf; 776 777 unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 778 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 779 if (unsupported != 0) { 780 linux_msg(td, "statx unsupported flags 0x%x", unsupported); 781 return (EINVAL); 782 } 783 784 flags = (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) ? 785 AT_SYMLINK_NOFOLLOW : 0; 786 flags |= (args->flags & LINUX_AT_EMPTY_PATH) ? 787 AT_EMPTY_PATH : 0; 788 789 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 790 if (!LUSECONVPATH(td)) { 791 error = linux_kern_statat(td, flags, dirfd, args->pathname, 792 UIO_USERSPACE, &buf); 793 } else { 794 LCONVPATHEXIST_AT(args->pathname, &path, dirfd); 795 error = linux_kern_statat(td, flags, dirfd, path, UIO_SYSSPACE, &buf); 796 LFREEPATH(path); 797 } 798 if (error == 0) 799 error = statx_copyout(&buf, args->statxbuf); 800 801 return (error); 802 }
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