Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
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_mnt_flags(int f_flags) 415 { 416 int flags = LINUX_ST_VALID; 417 418 if (f_flags & MNT_RDONLY) 419 flags |= LINUX_ST_RDONLY; 420 if (f_flags & MNT_NOEXEC) 421 flags |= LINUX_ST_NOEXEC; 422 if (f_flags & MNT_NOSUID) 423 flags |= LINUX_ST_NOSUID; 424 if (f_flags & MNT_NOATIME) 425 flags |= LINUX_ST_NOATIME; 426 if (f_flags & MNT_NOSYMFOLLOW) 427 flags |= LINUX_ST_NOSYMFOLLOW; 428 if (f_flags & MNT_SYNCHRONOUS) 429 flags |= LINUX_ST_SYNCHRONOUS; 430 431 return (flags); 432 } 433 434 static int 435 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 436 { 437 438 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 439 statfs_scale_blocks(bsd_statfs, INT32_MAX); 440 #endif 441 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 442 linux_statfs->f_bsize = bsd_statfs->f_bsize; 443 linux_statfs->f_blocks = bsd_statfs->f_blocks; 444 linux_statfs->f_bfree = bsd_statfs->f_bfree; 445 linux_statfs->f_bavail = bsd_statfs->f_bavail; 446 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 447 linux_statfs->f_ffree = MIN(bsd_statfs->f_ffree, INT32_MAX); 448 linux_statfs->f_files = MIN(bsd_statfs->f_files, INT32_MAX); 449 #else 450 linux_statfs->f_ffree = bsd_statfs->f_ffree; 451 linux_statfs->f_files = bsd_statfs->f_files; 452 #endif 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 return (0); 461 } 462 463 int 464 linux_statfs(struct thread *td, struct linux_statfs_args *args) 465 { 466 struct l_statfs linux_statfs; 467 struct statfs *bsd_statfs; 468 char *path; 469 int error; 470 471 if (!LUSECONVPATH(td)) { 472 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 473 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 474 } else { 475 LCONVPATHEXIST(args->path, &path); 476 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 477 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 478 LFREEPATH(path); 479 } 480 if (error == 0) 481 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 482 free(bsd_statfs, M_STATFS); 483 if (error != 0) 484 return (error); 485 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 486 } 487 488 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 489 static void 490 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 491 { 492 493 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 494 linux_statfs->f_bsize = bsd_statfs->f_bsize; 495 linux_statfs->f_blocks = bsd_statfs->f_blocks; 496 linux_statfs->f_bfree = bsd_statfs->f_bfree; 497 linux_statfs->f_bavail = bsd_statfs->f_bavail; 498 linux_statfs->f_ffree = bsd_statfs->f_ffree; 499 linux_statfs->f_files = bsd_statfs->f_files; 500 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 501 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 502 linux_statfs->f_namelen = MAXNAMLEN; 503 linux_statfs->f_frsize = bsd_statfs->f_bsize; 504 linux_statfs->f_flags = bsd_to_linux_mnt_flags(bsd_statfs->f_flags); 505 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 506 } 507 508 int 509 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 510 { 511 struct l_statfs64 linux_statfs; 512 struct statfs *bsd_statfs; 513 char *path; 514 int error; 515 516 if (args->bufsize != sizeof(struct l_statfs64)) 517 return (EINVAL); 518 519 if (!LUSECONVPATH(td)) { 520 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 521 error = kern_statfs(td, args->path, UIO_USERSPACE, bsd_statfs); 522 } else { 523 LCONVPATHEXIST(args->path, &path); 524 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 525 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 526 LFREEPATH(path); 527 } 528 if (error == 0) 529 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 530 free(bsd_statfs, M_STATFS); 531 if (error != 0) 532 return (error); 533 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 534 } 535 536 int 537 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 538 { 539 struct l_statfs64 linux_statfs; 540 struct statfs *bsd_statfs; 541 int error; 542 543 if (args->bufsize != sizeof(struct l_statfs64)) 544 return (EINVAL); 545 546 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 547 error = kern_fstatfs(td, args->fd, bsd_statfs); 548 if (error == 0) 549 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 550 free(bsd_statfs, M_STATFS); 551 if (error != 0) 552 return (error); 553 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 554 } 555 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 556 557 int 558 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 559 { 560 struct l_statfs linux_statfs; 561 struct statfs *bsd_statfs; 562 int error; 563 564 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 565 error = kern_fstatfs(td, args->fd, bsd_statfs); 566 if (error == 0) 567 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 568 free(bsd_statfs, M_STATFS); 569 if (error != 0) 570 return (error); 571 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 572 } 573 574 struct l_ustat 575 { 576 l_daddr_t f_tfree; 577 l_ino_t f_tinode; 578 char f_fname[6]; 579 char f_fpack[6]; 580 }; 581 582 #ifdef LINUX_LEGACY_SYSCALLS 583 int 584 linux_ustat(struct thread *td, struct linux_ustat_args *args) 585 { 586 587 return (EOPNOTSUPP); 588 } 589 #endif 590 591 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 592 593 static int 594 stat64_copyout(struct stat *buf, void *ubuf) 595 { 596 struct l_stat64 lbuf; 597 598 bzero(&lbuf, sizeof(lbuf)); 599 lbuf.st_dev = dev_to_ldev(buf->st_dev); 600 lbuf.st_ino = buf->st_ino; 601 lbuf.st_mode = buf->st_mode; 602 lbuf.st_nlink = buf->st_nlink; 603 lbuf.st_uid = buf->st_uid; 604 lbuf.st_gid = buf->st_gid; 605 lbuf.st_rdev = buf->st_rdev; 606 lbuf.st_size = buf->st_size; 607 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 608 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 609 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 610 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 611 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 612 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 613 lbuf.st_blksize = buf->st_blksize; 614 lbuf.st_blocks = buf->st_blocks; 615 616 /* 617 * The __st_ino field makes all the difference. In the Linux kernel 618 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 619 * but without the assignment to __st_ino the runtime linker refuses 620 * to mmap(2) any shared libraries. I guess it's broken alright :-) 621 */ 622 lbuf.__st_ino = buf->st_ino; 623 624 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 625 } 626 627 int 628 linux_stat64(struct thread *td, struct linux_stat64_args *args) 629 { 630 struct stat buf; 631 char *filename; 632 int error; 633 634 if (!LUSECONVPATH(td)) { 635 error = linux_kern_stat(td, args->filename, UIO_USERSPACE, &buf); 636 } else { 637 LCONVPATHEXIST(args->filename, &filename); 638 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 639 LFREEPATH(filename); 640 } 641 if (error) 642 return (error); 643 return (stat64_copyout(&buf, args->statbuf)); 644 } 645 646 int 647 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 648 { 649 struct stat sb; 650 char *filename; 651 int error; 652 653 if (!LUSECONVPATH(td)) { 654 error = linux_kern_lstat(td, args->filename, UIO_USERSPACE, &sb); 655 } else { 656 LCONVPATHEXIST(args->filename, &filename); 657 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 658 LFREEPATH(filename); 659 } 660 if (error) 661 return (error); 662 return (stat64_copyout(&sb, args->statbuf)); 663 } 664 665 int 666 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 667 { 668 struct stat buf; 669 int error; 670 671 error = kern_fstat(td, args->fd, &buf); 672 translate_fd_major_minor(td, args->fd, &buf); 673 if (!error) 674 error = stat64_copyout(&buf, args->statbuf); 675 676 return (error); 677 } 678 679 int 680 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 681 { 682 char *path; 683 int error, dfd, flag, unsupported; 684 struct stat buf; 685 686 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 687 if (unsupported != 0) { 688 linux_msg(td, "fstatat64 unsupported flag 0x%x", unsupported); 689 return (EINVAL); 690 } 691 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 692 AT_SYMLINK_NOFOLLOW : 0; 693 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 694 AT_EMPTY_PATH : 0; 695 696 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 697 if (!LUSECONVPATH(td)) { 698 error = linux_kern_statat(td, flag, dfd, args->pathname, 699 UIO_USERSPACE, &buf); 700 } else { 701 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 702 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 703 LFREEPATH(path); 704 } 705 if (error == 0) 706 error = stat64_copyout(&buf, args->statbuf); 707 708 return (error); 709 } 710 711 #else /* __amd64__ && !COMPAT_LINUX32 */ 712 713 int 714 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 715 { 716 char *path; 717 int error, dfd, flag, unsupported; 718 struct stat buf; 719 720 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH); 721 if (unsupported != 0) { 722 linux_msg(td, "fstatat unsupported flag 0x%x", unsupported); 723 return (EINVAL); 724 } 725 726 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 727 AT_SYMLINK_NOFOLLOW : 0; 728 flag |= (args->flag & LINUX_AT_EMPTY_PATH) ? 729 AT_EMPTY_PATH : 0; 730 731 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 732 if (!LUSECONVPATH(td)) { 733 error = linux_kern_statat(td, flag, dfd, args->pathname, 734 UIO_USERSPACE, &buf); 735 } else { 736 LCONVPATHEXIST_AT(args->pathname, &path, dfd); 737 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 738 LFREEPATH(path); 739 } 740 if (error == 0) 741 error = newstat_copyout(&buf, args->statbuf); 742 743 return (error); 744 } 745 746 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 747 748 int 749 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 750 { 751 struct mount *mp; 752 struct vnode *vp; 753 int error, save; 754 755 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); 756 if (error != 0) 757 /* 758 * Linux syncfs() returns only EBADF, however fgetvp() 759 * can return EINVAL in case of file descriptor does 760 * not represent a vnode. XXX. 761 */ 762 return (error); 763 764 mp = vp->v_mount; 765 mtx_lock(&mountlist_mtx); 766 error = vfs_busy(mp, MBF_MNTLSTLOCK); 767 if (error != 0) { 768 /* See comment above. */ 769 mtx_unlock(&mountlist_mtx); 770 goto out; 771 } 772 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 773 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 774 save = curthread_pflags_set(TDP_SYNCIO); 775 vfs_periodic(mp, MNT_NOWAIT); 776 VFS_SYNC(mp, MNT_NOWAIT); 777 curthread_pflags_restore(save); 778 vn_finished_write(mp); 779 } 780 vfs_unbusy(mp); 781 782 out: 783 vrele(vp); 784 return (error); 785 } 786 787 int 788 linux_statx(struct thread *td, struct linux_statx_args *args) 789 { 790 char *path; 791 int error, dirfd, flags, unsupported; 792 struct stat buf; 793 794 unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | 795 LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT); 796 if (unsupported != 0) { 797 linux_msg(td, "statx unsupported flags 0x%x", unsupported); 798 return (EINVAL); 799 } 800 801 flags = (args->flags & LINUX_AT_SYMLINK_NOFOLLOW) ? 802 AT_SYMLINK_NOFOLLOW : 0; 803 flags |= (args->flags & LINUX_AT_EMPTY_PATH) ? 804 AT_EMPTY_PATH : 0; 805 806 dirfd = (args->dirfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dirfd; 807 if (!LUSECONVPATH(td)) { 808 error = linux_kern_statat(td, flags, dirfd, args->pathname, 809 UIO_USERSPACE, &buf); 810 } else { 811 LCONVPATHEXIST_AT(args->pathname, &path, dirfd); 812 error = linux_kern_statat(td, flags, dirfd, path, UIO_SYSSPACE, &buf); 813 LFREEPATH(path); 814 } 815 if (error == 0) 816 error = statx_copyout(&buf, args->statxbuf); 817 818 return (error); 819 }
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