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 63 static void 64 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 65 { 66 int major, minor; 67 68 if (vp->v_type == VCHR && vp->v_rdev != NULL && 69 linux_driver_get_major_minor(devtoname(vp->v_rdev), 70 &major, &minor) == 0) { 71 sb->st_rdev = (major << 8 | minor); 72 } 73 } 74 75 static int 76 linux_kern_statat(struct thread *td, int flag, int fd, char *path, 77 enum uio_seg pathseg, struct stat *sbp) 78 { 79 80 return (kern_statat(td, flag, fd, path, pathseg, sbp, 81 translate_vnhook_major_minor)); 82 } 83 84 #ifdef LINUX_LEGACY_SYSCALLS 85 static int 86 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, 87 struct stat *sbp) 88 { 89 90 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 91 } 92 93 static int 94 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, 95 struct stat *sbp) 96 { 97 98 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 99 pathseg, sbp)); 100 } 101 #endif 102 103 static void 104 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 105 { 106 struct file *fp; 107 struct vnode *vp; 108 cap_rights_t rights; 109 int major, minor; 110 111 /* 112 * No capability rights required here. 113 */ 114 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 115 fget(td, fd, cap_rights_init(&rights), &fp) != 0) 116 return; 117 vp = fp->f_vnode; 118 if (vp != NULL && vp->v_rdev != NULL && 119 linux_driver_get_major_minor(devtoname(vp->v_rdev), 120 &major, &minor) == 0) { 121 buf->st_rdev = (major << 8 | minor); 122 } else if (fp->f_type == DTYPE_PTS) { 123 struct tty *tp = fp->f_data; 124 125 /* Convert the numbers for the slave device. */ 126 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 127 &major, &minor) == 0) { 128 buf->st_rdev = (major << 8 | minor); 129 } 130 } 131 fdrop(fp, td); 132 } 133 134 static int 135 newstat_copyout(struct stat *buf, void *ubuf) 136 { 137 struct l_newstat tbuf; 138 139 bzero(&tbuf, sizeof(tbuf)); 140 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 141 tbuf.st_ino = buf->st_ino; 142 tbuf.st_mode = buf->st_mode; 143 tbuf.st_nlink = buf->st_nlink; 144 tbuf.st_uid = buf->st_uid; 145 tbuf.st_gid = buf->st_gid; 146 tbuf.st_rdev = buf->st_rdev; 147 tbuf.st_size = buf->st_size; 148 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 149 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 150 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 151 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 152 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 153 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 154 tbuf.st_blksize = buf->st_blksize; 155 tbuf.st_blocks = buf->st_blocks; 156 157 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 158 } 159 160 #ifdef LINUX_LEGACY_SYSCALLS 161 int 162 linux_newstat(struct thread *td, struct linux_newstat_args *args) 163 { 164 struct stat buf; 165 char *path; 166 int error; 167 168 LCONVPATHEXIST(td, args->path, &path); 169 170 #ifdef DEBUG 171 if (ldebug(newstat)) 172 printf(ARGS(newstat, "%s, *"), path); 173 #endif 174 175 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 176 LFREEPATH(path); 177 if (error) 178 return (error); 179 return (newstat_copyout(&buf, args->buf)); 180 } 181 182 int 183 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 184 { 185 struct stat sb; 186 char *path; 187 int error; 188 189 LCONVPATHEXIST(td, args->path, &path); 190 191 #ifdef DEBUG 192 if (ldebug(newlstat)) 193 printf(ARGS(newlstat, "%s, *"), path); 194 #endif 195 196 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 197 LFREEPATH(path); 198 if (error) 199 return (error); 200 return (newstat_copyout(&sb, args->buf)); 201 } 202 #endif 203 204 int 205 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 206 { 207 struct stat buf; 208 int error; 209 210 #ifdef DEBUG 211 if (ldebug(newfstat)) 212 printf(ARGS(newfstat, "%d, *"), args->fd); 213 #endif 214 215 error = kern_fstat(td, args->fd, &buf); 216 translate_fd_major_minor(td, args->fd, &buf); 217 if (!error) 218 error = newstat_copyout(&buf, args->buf); 219 220 return (error); 221 } 222 223 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 224 static int 225 stat_copyout(struct stat *buf, void *ubuf) 226 { 227 struct l_stat lbuf; 228 229 bzero(&lbuf, sizeof(lbuf)); 230 lbuf.st_dev = buf->st_dev; 231 lbuf.st_ino = buf->st_ino; 232 lbuf.st_mode = buf->st_mode; 233 lbuf.st_nlink = buf->st_nlink; 234 lbuf.st_uid = buf->st_uid; 235 lbuf.st_gid = buf->st_gid; 236 lbuf.st_rdev = buf->st_rdev; 237 if (buf->st_size < (quad_t)1 << 32) 238 lbuf.st_size = buf->st_size; 239 else 240 lbuf.st_size = -2; 241 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 242 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 243 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 244 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 245 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 246 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 247 lbuf.st_blksize = buf->st_blksize; 248 lbuf.st_blocks = buf->st_blocks; 249 lbuf.st_flags = buf->st_flags; 250 lbuf.st_gen = buf->st_gen; 251 252 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 253 } 254 255 int 256 linux_stat(struct thread *td, struct linux_stat_args *args) 257 { 258 struct stat buf; 259 char *path; 260 int error; 261 262 LCONVPATHEXIST(td, args->path, &path); 263 264 #ifdef DEBUG 265 if (ldebug(stat)) 266 printf(ARGS(stat, "%s, *"), path); 267 #endif 268 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 269 if (error) { 270 LFREEPATH(path); 271 return (error); 272 } 273 LFREEPATH(path); 274 return (stat_copyout(&buf, args->up)); 275 } 276 277 int 278 linux_lstat(struct thread *td, struct linux_lstat_args *args) 279 { 280 struct stat buf; 281 char *path; 282 int error; 283 284 LCONVPATHEXIST(td, args->path, &path); 285 286 #ifdef DEBUG 287 if (ldebug(lstat)) 288 printf(ARGS(lstat, "%s, *"), path); 289 #endif 290 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 291 if (error) { 292 LFREEPATH(path); 293 return (error); 294 } 295 LFREEPATH(path); 296 return (stat_copyout(&buf, args->up)); 297 } 298 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 299 300 struct l_statfs { 301 l_long f_type; 302 l_long f_bsize; 303 l_long f_blocks; 304 l_long f_bfree; 305 l_long f_bavail; 306 l_long f_files; 307 l_long f_ffree; 308 l_fsid_t f_fsid; 309 l_long f_namelen; 310 l_long f_frsize; 311 l_long f_flags; 312 l_long f_spare[4]; 313 }; 314 315 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 316 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 317 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 318 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 319 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 320 #define LINUX_NCP_SUPER_MAGIC 0x564cL 321 #define LINUX_NFS_SUPER_MAGIC 0x6969L 322 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 323 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 324 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 325 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 326 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 327 #define LINUX_SHMFS_MAGIC 0x01021994 328 329 static long 330 bsd_to_linux_ftype(const char *fstypename) 331 { 332 int i; 333 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 334 {"ufs", LINUX_UFS_SUPER_MAGIC}, 335 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 336 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 337 {"nfs", LINUX_NFS_SUPER_MAGIC}, 338 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 339 {"procfs", LINUX_PROC_SUPER_MAGIC}, 340 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 341 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 342 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 343 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 344 {"coda", LINUX_CODA_SUPER_MAGIC}, 345 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 346 {"tmpfs", LINUX_SHMFS_MAGIC}, 347 {NULL, 0L}}; 348 349 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 350 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 351 return (b2l_tbl[i].linux_type); 352 353 return (0L); 354 } 355 356 static int 357 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 358 { 359 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 360 uint64_t tmp; 361 362 #define LINUX_HIBITS 0xffffffff00000000ULL 363 364 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 365 bsd_statfs->f_bsize; 366 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 367 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 368 (tmp & LINUX_HIBITS)) 369 return (EOVERFLOW); 370 #undef LINUX_HIBITS 371 #endif 372 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 373 linux_statfs->f_bsize = bsd_statfs->f_bsize; 374 linux_statfs->f_blocks = bsd_statfs->f_blocks; 375 linux_statfs->f_bfree = bsd_statfs->f_bfree; 376 linux_statfs->f_bavail = bsd_statfs->f_bavail; 377 linux_statfs->f_ffree = bsd_statfs->f_ffree; 378 linux_statfs->f_files = bsd_statfs->f_files; 379 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 380 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 381 linux_statfs->f_namelen = MAXNAMLEN; 382 linux_statfs->f_frsize = bsd_statfs->f_bsize; 383 linux_statfs->f_flags = 0; 384 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 385 386 return (0); 387 } 388 389 int 390 linux_statfs(struct thread *td, struct linux_statfs_args *args) 391 { 392 struct l_statfs linux_statfs; 393 struct statfs *bsd_statfs; 394 char *path; 395 int error; 396 397 LCONVPATHEXIST(td, args->path, &path); 398 399 #ifdef DEBUG 400 if (ldebug(statfs)) 401 printf(ARGS(statfs, "%s, *"), path); 402 #endif 403 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 404 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 405 LFREEPATH(path); 406 if (error == 0) 407 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 408 free(bsd_statfs, M_STATFS); 409 if (error != 0) 410 return (error); 411 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 412 } 413 414 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 415 static void 416 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 417 { 418 419 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 420 linux_statfs->f_bsize = bsd_statfs->f_bsize; 421 linux_statfs->f_blocks = bsd_statfs->f_blocks; 422 linux_statfs->f_bfree = bsd_statfs->f_bfree; 423 linux_statfs->f_bavail = bsd_statfs->f_bavail; 424 linux_statfs->f_ffree = bsd_statfs->f_ffree; 425 linux_statfs->f_files = bsd_statfs->f_files; 426 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 427 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 428 linux_statfs->f_namelen = MAXNAMLEN; 429 linux_statfs->f_frsize = bsd_statfs->f_bsize; 430 linux_statfs->f_flags = 0; 431 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 432 } 433 434 int 435 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 436 { 437 struct l_statfs64 linux_statfs; 438 struct statfs *bsd_statfs; 439 char *path; 440 int error; 441 442 if (args->bufsize != sizeof(struct l_statfs64)) 443 return (EINVAL); 444 445 LCONVPATHEXIST(td, args->path, &path); 446 447 #ifdef DEBUG 448 if (ldebug(statfs64)) 449 printf(ARGS(statfs64, "%s, *"), path); 450 #endif 451 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 452 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 453 LFREEPATH(path); 454 if (error == 0) 455 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 456 free(bsd_statfs, M_STATFS); 457 if (error != 0) 458 return (error); 459 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 460 } 461 462 int 463 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 464 { 465 struct l_statfs64 linux_statfs; 466 struct statfs *bsd_statfs; 467 int error; 468 469 #ifdef DEBUG 470 if (ldebug(fstatfs64)) 471 printf(ARGS(fstatfs64, "%d, *"), args->fd); 472 #endif 473 if (args->bufsize != sizeof(struct l_statfs64)) 474 return (EINVAL); 475 476 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 477 error = kern_fstatfs(td, args->fd, bsd_statfs); 478 if (error == 0) 479 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 480 free(bsd_statfs, M_STATFS); 481 if (error != 0) 482 return (error); 483 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 484 } 485 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 486 487 int 488 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 489 { 490 struct l_statfs linux_statfs; 491 struct statfs *bsd_statfs; 492 int error; 493 494 #ifdef DEBUG 495 if (ldebug(fstatfs)) 496 printf(ARGS(fstatfs, "%d, *"), args->fd); 497 #endif 498 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 499 error = kern_fstatfs(td, args->fd, bsd_statfs); 500 if (error == 0) 501 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 502 free(bsd_statfs, M_STATFS); 503 if (error != 0) 504 return (error); 505 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 506 } 507 508 struct l_ustat 509 { 510 l_daddr_t f_tfree; 511 l_ino_t f_tinode; 512 char f_fname[6]; 513 char f_fpack[6]; 514 }; 515 516 #ifdef LINUX_LEGACY_SYSCALLS 517 int 518 linux_ustat(struct thread *td, struct linux_ustat_args *args) 519 { 520 #ifdef DEBUG 521 if (ldebug(ustat)) 522 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 523 #endif 524 525 return (EOPNOTSUPP); 526 } 527 #endif 528 529 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 530 531 static int 532 stat64_copyout(struct stat *buf, void *ubuf) 533 { 534 struct l_stat64 lbuf; 535 536 bzero(&lbuf, sizeof(lbuf)); 537 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 538 lbuf.st_ino = buf->st_ino; 539 lbuf.st_mode = buf->st_mode; 540 lbuf.st_nlink = buf->st_nlink; 541 lbuf.st_uid = buf->st_uid; 542 lbuf.st_gid = buf->st_gid; 543 lbuf.st_rdev = buf->st_rdev; 544 lbuf.st_size = buf->st_size; 545 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 546 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 547 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 548 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 549 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 550 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 551 lbuf.st_blksize = buf->st_blksize; 552 lbuf.st_blocks = buf->st_blocks; 553 554 /* 555 * The __st_ino field makes all the difference. In the Linux kernel 556 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 557 * but without the assignment to __st_ino the runtime linker refuses 558 * to mmap(2) any shared libraries. I guess it's broken alright :-) 559 */ 560 lbuf.__st_ino = buf->st_ino; 561 562 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 563 } 564 565 int 566 linux_stat64(struct thread *td, struct linux_stat64_args *args) 567 { 568 struct stat buf; 569 char *filename; 570 int error; 571 572 LCONVPATHEXIST(td, args->filename, &filename); 573 574 #ifdef DEBUG 575 if (ldebug(stat64)) 576 printf(ARGS(stat64, "%s, *"), filename); 577 #endif 578 579 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 580 LFREEPATH(filename); 581 if (error) 582 return (error); 583 return (stat64_copyout(&buf, args->statbuf)); 584 } 585 586 int 587 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 588 { 589 struct stat sb; 590 char *filename; 591 int error; 592 593 LCONVPATHEXIST(td, args->filename, &filename); 594 595 #ifdef DEBUG 596 if (ldebug(lstat64)) 597 printf(ARGS(lstat64, "%s, *"), args->filename); 598 #endif 599 600 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 601 LFREEPATH(filename); 602 if (error) 603 return (error); 604 return (stat64_copyout(&sb, args->statbuf)); 605 } 606 607 int 608 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 609 { 610 struct stat buf; 611 int error; 612 613 #ifdef DEBUG 614 if (ldebug(fstat64)) 615 printf(ARGS(fstat64, "%d, *"), args->fd); 616 #endif 617 618 error = kern_fstat(td, args->fd, &buf); 619 translate_fd_major_minor(td, args->fd, &buf); 620 if (!error) 621 error = stat64_copyout(&buf, args->statbuf); 622 623 return (error); 624 } 625 626 int 627 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 628 { 629 char *path; 630 int error, dfd, flag; 631 struct stat buf; 632 633 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 634 return (EINVAL); 635 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 636 AT_SYMLINK_NOFOLLOW : 0; 637 638 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 639 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 640 641 #ifdef DEBUG 642 if (ldebug(fstatat64)) 643 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 644 #endif 645 646 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 647 if (!error) 648 error = stat64_copyout(&buf, args->statbuf); 649 LFREEPATH(path); 650 651 return (error); 652 } 653 654 #else /* __amd64__ && !COMPAT_LINUX32 */ 655 656 int 657 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 658 { 659 char *path; 660 int error, dfd, flag; 661 struct stat buf; 662 663 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 664 return (EINVAL); 665 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 666 AT_SYMLINK_NOFOLLOW : 0; 667 668 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 669 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 670 671 #ifdef DEBUG 672 if (ldebug(newfstatat)) 673 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 674 #endif 675 676 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 677 if (error == 0) 678 error = newstat_copyout(&buf, args->statbuf); 679 LFREEPATH(path); 680 681 return (error); 682 } 683 684 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 685 686 int 687 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 688 { 689 cap_rights_t rights; 690 struct mount *mp; 691 struct vnode *vp; 692 int error, save; 693 694 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp); 695 if (error != 0) 696 /* 697 * Linux syncfs() returns only EBADF, however fgetvp() 698 * can return EINVAL in case of file descriptor does 699 * not represent a vnode. XXX. 700 */ 701 return (error); 702 703 mp = vp->v_mount; 704 mtx_lock(&mountlist_mtx); 705 error = vfs_busy(mp, MBF_MNTLSTLOCK); 706 if (error != 0) { 707 /* See comment above. */ 708 mtx_unlock(&mountlist_mtx); 709 goto out; 710 } 711 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 712 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 713 save = curthread_pflags_set(TDP_SYNCIO); 714 vfs_msync(mp, MNT_NOWAIT); 715 VFS_SYNC(mp, MNT_NOWAIT); 716 curthread_pflags_restore(save); 717 vn_finished_write(mp); 718 } 719 vfs_unbusy(mp); 720 721 out: 722 vrele(vp); 723 return (error); 724 }
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