linux_stats.c revision 297302
1/*- 2 * Copyright (c) 1994-1995 S��ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_stats.c 297302 2016-03-27 06:21:05Z dchagin $"); 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 63static void 64translate_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 75static int 76linux_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_vnhook(td, flag, fd, path, pathseg, sbp, 81 translate_vnhook_major_minor)); 82} 83 84static int 85linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, 86 struct stat *sbp) 87{ 88 89 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 90} 91 92static int 93linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, 94 struct stat *sbp) 95{ 96 97 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 98 pathseg, sbp)); 99} 100 101/* 102 * XXX: This was removed from newstat_copyout(), and almost identical 103 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced 104 * XXX: with something that does lookup and locking properly. 105 * XXX: When somebody fixes this: please try to avoid duplicating it. 106 */ 107#if 0 108static void 109disk_foo(struct somestat *tbuf) 110{ 111 struct cdevsw *cdevsw; 112 struct cdev *dev; 113 114 /* Lie about disk drives which are character devices 115 * in FreeBSD but block devices under Linux. 116 */ 117 if (S_ISCHR(tbuf.st_mode) && 118 (dev = findcdev(buf->st_rdev)) != NULL) { 119 cdevsw = dev_refthread(dev); 120 if (cdevsw != NULL) { 121 if (cdevsw->d_flags & D_DISK) { 122 tbuf.st_mode &= ~S_IFMT; 123 tbuf.st_mode |= S_IFBLK; 124 125 /* XXX this may not be quite right */ 126 /* Map major number to 0 */ 127 tbuf.st_dev = minor(buf->st_dev) & 0xf; 128 tbuf.st_rdev = buf->st_rdev & 0xff; 129 } 130 dev_relthread(dev); 131 } 132 } 133 134} 135#endif 136 137static void 138translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 139{ 140 struct file *fp; 141 struct vnode *vp; 142 int major, minor; 143 144 /* 145 * No capability rights required here. 146 */ 147 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 148 fget(td, fd, 0, &fp) != 0) 149 return; 150 vp = fp->f_vnode; 151 if (vp != NULL && vp->v_rdev != NULL && 152 linux_driver_get_major_minor(devtoname(vp->v_rdev), 153 &major, &minor) == 0) { 154 buf->st_rdev = (major << 8 | minor); 155 } else if (fp->f_type == DTYPE_PTS) { 156 struct tty *tp = fp->f_data; 157 158 /* Convert the numbers for the slave device. */ 159 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 160 &major, &minor) == 0) { 161 buf->st_rdev = (major << 8 | minor); 162 } 163 } 164 fdrop(fp, td); 165} 166 167static int 168newstat_copyout(struct stat *buf, void *ubuf) 169{ 170 struct l_newstat tbuf; 171 172 bzero(&tbuf, sizeof(tbuf)); 173 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 174 tbuf.st_ino = buf->st_ino; 175 tbuf.st_mode = buf->st_mode; 176 tbuf.st_nlink = buf->st_nlink; 177 tbuf.st_uid = buf->st_uid; 178 tbuf.st_gid = buf->st_gid; 179 tbuf.st_rdev = buf->st_rdev; 180 tbuf.st_size = buf->st_size; 181 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 182 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 183 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 184 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 185 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 186 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 187 tbuf.st_blksize = buf->st_blksize; 188 tbuf.st_blocks = buf->st_blocks; 189 190 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 191} 192 193int 194linux_newstat(struct thread *td, struct linux_newstat_args *args) 195{ 196 struct stat buf; 197 char *path; 198 int error; 199 200 LCONVPATHEXIST(td, args->path, &path); 201 202#ifdef DEBUG 203 if (ldebug(newstat)) 204 printf(ARGS(newstat, "%s, *"), path); 205#endif 206 207 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 208 LFREEPATH(path); 209 if (error) 210 return (error); 211 return (newstat_copyout(&buf, args->buf)); 212} 213 214int 215linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 216{ 217 struct stat sb; 218 char *path; 219 int error; 220 221 LCONVPATHEXIST(td, args->path, &path); 222 223#ifdef DEBUG 224 if (ldebug(newlstat)) 225 printf(ARGS(newlstat, "%s, *"), path); 226#endif 227 228 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 229 LFREEPATH(path); 230 if (error) 231 return (error); 232 return (newstat_copyout(&sb, args->buf)); 233} 234 235int 236linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 237{ 238 struct stat buf; 239 int error; 240 241#ifdef DEBUG 242 if (ldebug(newfstat)) 243 printf(ARGS(newfstat, "%d, *"), args->fd); 244#endif 245 246 error = kern_fstat(td, args->fd, &buf); 247 translate_fd_major_minor(td, args->fd, &buf); 248 if (!error) 249 error = newstat_copyout(&buf, args->buf); 250 251 return (error); 252} 253 254#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 255static int 256stat_copyout(struct stat *buf, void *ubuf) 257{ 258 struct l_stat lbuf; 259 260 bzero(&lbuf, sizeof(lbuf)); 261 lbuf.st_dev = buf->st_dev; 262 lbuf.st_ino = buf->st_ino; 263 lbuf.st_mode = buf->st_mode; 264 lbuf.st_nlink = buf->st_nlink; 265 lbuf.st_uid = buf->st_uid; 266 lbuf.st_gid = buf->st_gid; 267 lbuf.st_rdev = buf->st_rdev; 268 if (buf->st_size < (quad_t)1 << 32) 269 lbuf.st_size = buf->st_size; 270 else 271 lbuf.st_size = -2; 272 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 273 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 274 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 275 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 276 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 277 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 278 lbuf.st_blksize = buf->st_blksize; 279 lbuf.st_blocks = buf->st_blocks; 280 lbuf.st_flags = buf->st_flags; 281 lbuf.st_gen = buf->st_gen; 282 283 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 284} 285 286int 287linux_stat(struct thread *td, struct linux_stat_args *args) 288{ 289 struct stat buf; 290 char *path; 291 int error; 292 293 LCONVPATHEXIST(td, args->path, &path); 294 295#ifdef DEBUG 296 if (ldebug(stat)) 297 printf(ARGS(stat, "%s, *"), path); 298#endif 299 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 300 if (error) { 301 LFREEPATH(path); 302 return (error); 303 } 304 LFREEPATH(path); 305 return (stat_copyout(&buf, args->up)); 306} 307 308int 309linux_lstat(struct thread *td, struct linux_lstat_args *args) 310{ 311 struct stat buf; 312 char *path; 313 int error; 314 315 LCONVPATHEXIST(td, args->path, &path); 316 317#ifdef DEBUG 318 if (ldebug(lstat)) 319 printf(ARGS(lstat, "%s, *"), path); 320#endif 321 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 322 if (error) { 323 LFREEPATH(path); 324 return (error); 325 } 326 LFREEPATH(path); 327 return (stat_copyout(&buf, args->up)); 328} 329#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 330 331struct l_statfs { 332 l_long f_type; 333 l_long f_bsize; 334 l_long f_blocks; 335 l_long f_bfree; 336 l_long f_bavail; 337 l_long f_files; 338 l_long f_ffree; 339 l_fsid_t f_fsid; 340 l_long f_namelen; 341 l_long f_spare[6]; 342}; 343 344#define LINUX_CODA_SUPER_MAGIC 0x73757245L 345#define LINUX_EXT2_SUPER_MAGIC 0xEF53L 346#define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 347#define LINUX_ISOFS_SUPER_MAGIC 0x9660L 348#define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 349#define LINUX_NCP_SUPER_MAGIC 0x564cL 350#define LINUX_NFS_SUPER_MAGIC 0x6969L 351#define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 352#define LINUX_PROC_SUPER_MAGIC 0x9fa0L 353#define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 354#define LINUX_DEVFS_SUPER_MAGIC 0x1373L 355#define LINUX_SHMFS_MAGIC 0x01021994 356 357static long 358bsd_to_linux_ftype(const char *fstypename) 359{ 360 int i; 361 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 362 {"ufs", LINUX_UFS_SUPER_MAGIC}, 363 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 364 {"nfs", LINUX_NFS_SUPER_MAGIC}, 365 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 366 {"procfs", LINUX_PROC_SUPER_MAGIC}, 367 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 368 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 369 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 370 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 371 {"coda", LINUX_CODA_SUPER_MAGIC}, 372 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 373 {"tmpfs", LINUX_SHMFS_MAGIC}, 374 {NULL, 0L}}; 375 376 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 377 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 378 return (b2l_tbl[i].linux_type); 379 380 return (0L); 381} 382 383static int 384bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 385{ 386#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 387 uint64_t tmp; 388 389#define LINUX_HIBITS 0xffffffff00000000ULL 390 391 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 392 bsd_statfs->f_bsize; 393 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 394 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 395 (tmp & LINUX_HIBITS)) 396 return (EOVERFLOW); 397#undef LINUX_HIBITS 398#endif 399 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 400 linux_statfs->f_bsize = bsd_statfs->f_bsize; 401 linux_statfs->f_blocks = bsd_statfs->f_blocks; 402 linux_statfs->f_bfree = bsd_statfs->f_bfree; 403 linux_statfs->f_bavail = bsd_statfs->f_bavail; 404 linux_statfs->f_ffree = bsd_statfs->f_ffree; 405 linux_statfs->f_files = bsd_statfs->f_files; 406 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 407 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 408 linux_statfs->f_namelen = MAXNAMLEN; 409 410 return (0); 411} 412 413int 414linux_statfs(struct thread *td, struct linux_statfs_args *args) 415{ 416 struct l_statfs linux_statfs; 417 struct statfs bsd_statfs; 418 char *path; 419 int error; 420 421 LCONVPATHEXIST(td, args->path, &path); 422 423#ifdef DEBUG 424 if (ldebug(statfs)) 425 printf(ARGS(statfs, "%s, *"), path); 426#endif 427 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 428 LFREEPATH(path); 429 if (error) 430 return (error); 431 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 432 if (error) 433 return (error); 434 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 435} 436 437#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 438static void 439bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 440{ 441 442 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 443 linux_statfs->f_bsize = bsd_statfs->f_bsize; 444 linux_statfs->f_blocks = bsd_statfs->f_blocks; 445 linux_statfs->f_bfree = bsd_statfs->f_bfree; 446 linux_statfs->f_bavail = bsd_statfs->f_bavail; 447 linux_statfs->f_ffree = bsd_statfs->f_ffree; 448 linux_statfs->f_files = bsd_statfs->f_files; 449 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 450 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 451 linux_statfs->f_namelen = MAXNAMLEN; 452} 453 454int 455linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 456{ 457 struct l_statfs64 linux_statfs; 458 struct statfs bsd_statfs; 459 char *path; 460 int error; 461 462 if (args->bufsize != sizeof(struct l_statfs64)) 463 return EINVAL; 464 465 LCONVPATHEXIST(td, args->path, &path); 466 467#ifdef DEBUG 468 if (ldebug(statfs64)) 469 printf(ARGS(statfs64, "%s, *"), path); 470#endif 471 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 472 LFREEPATH(path); 473 if (error) 474 return (error); 475 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs); 476 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 477} 478 479int 480linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 481{ 482 struct l_statfs64 linux_statfs; 483 struct statfs bsd_statfs; 484 int error; 485 486#ifdef DEBUG 487 if (ldebug(fstatfs64)) 488 printf(ARGS(fstatfs64, "%d, *"), args->fd); 489#endif 490 if (args->bufsize != sizeof(struct l_statfs64)) 491 return (EINVAL); 492 493 error = kern_fstatfs(td, args->fd, &bsd_statfs); 494 if (error) 495 return error; 496 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs); 497 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 498} 499#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 500 501int 502linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 503{ 504 struct l_statfs linux_statfs; 505 struct statfs bsd_statfs; 506 int error; 507 508#ifdef DEBUG 509 if (ldebug(fstatfs)) 510 printf(ARGS(fstatfs, "%d, *"), args->fd); 511#endif 512 error = kern_fstatfs(td, args->fd, &bsd_statfs); 513 if (error) 514 return (error); 515 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 516 if (error) 517 return (error); 518 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 519} 520 521struct l_ustat 522{ 523 l_daddr_t f_tfree; 524 l_ino_t f_tinode; 525 char f_fname[6]; 526 char f_fpack[6]; 527}; 528 529int 530linux_ustat(struct thread *td, struct linux_ustat_args *args) 531{ 532#ifdef DEBUG 533 if (ldebug(ustat)) 534 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 535#endif 536 537 return (EOPNOTSUPP); 538} 539 540#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 541 542static int 543stat64_copyout(struct stat *buf, void *ubuf) 544{ 545 struct l_stat64 lbuf; 546 547 bzero(&lbuf, sizeof(lbuf)); 548 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 549 lbuf.st_ino = buf->st_ino; 550 lbuf.st_mode = buf->st_mode; 551 lbuf.st_nlink = buf->st_nlink; 552 lbuf.st_uid = buf->st_uid; 553 lbuf.st_gid = buf->st_gid; 554 lbuf.st_rdev = buf->st_rdev; 555 lbuf.st_size = buf->st_size; 556 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 557 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 558 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 559 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 560 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 561 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 562 lbuf.st_blksize = buf->st_blksize; 563 lbuf.st_blocks = buf->st_blocks; 564 565 /* 566 * The __st_ino field makes all the difference. In the Linux kernel 567 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 568 * but without the assignment to __st_ino the runtime linker refuses 569 * to mmap(2) any shared libraries. I guess it's broken alright :-) 570 */ 571 lbuf.__st_ino = buf->st_ino; 572 573 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 574} 575 576int 577linux_stat64(struct thread *td, struct linux_stat64_args *args) 578{ 579 struct stat buf; 580 char *filename; 581 int error; 582 583 LCONVPATHEXIST(td, args->filename, &filename); 584 585#ifdef DEBUG 586 if (ldebug(stat64)) 587 printf(ARGS(stat64, "%s, *"), filename); 588#endif 589 590 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 591 LFREEPATH(filename); 592 if (error) 593 return (error); 594 return (stat64_copyout(&buf, args->statbuf)); 595} 596 597int 598linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 599{ 600 struct stat sb; 601 char *filename; 602 int error; 603 604 LCONVPATHEXIST(td, args->filename, &filename); 605 606#ifdef DEBUG 607 if (ldebug(lstat64)) 608 printf(ARGS(lstat64, "%s, *"), args->filename); 609#endif 610 611 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 612 LFREEPATH(filename); 613 if (error) 614 return (error); 615 return (stat64_copyout(&sb, args->statbuf)); 616} 617 618int 619linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 620{ 621 struct stat buf; 622 int error; 623 624#ifdef DEBUG 625 if (ldebug(fstat64)) 626 printf(ARGS(fstat64, "%d, *"), args->fd); 627#endif 628 629 error = kern_fstat(td, args->fd, &buf); 630 translate_fd_major_minor(td, args->fd, &buf); 631 if (!error) 632 error = stat64_copyout(&buf, args->statbuf); 633 634 return (error); 635} 636 637int 638linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 639{ 640 char *path; 641 int error, dfd, flag; 642 struct stat buf; 643 644 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 645 return (EINVAL); 646 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 647 AT_SYMLINK_NOFOLLOW : 0; 648 649 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 650 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 651 652#ifdef DEBUG 653 if (ldebug(fstatat64)) 654 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 655#endif 656 657 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 658 if (!error) 659 error = stat64_copyout(&buf, args->statbuf); 660 LFREEPATH(path); 661 662 return (error); 663} 664 665#else /* __amd64__ && !COMPAT_LINUX32 */ 666 667int 668linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 669{ 670 char *path; 671 int error, dfd, flag; 672 struct stat buf; 673 674 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 675 return (EINVAL); 676 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 677 AT_SYMLINK_NOFOLLOW : 0; 678 679 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 680 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 681 682#ifdef DEBUG 683 if (ldebug(newfstatat)) 684 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 685#endif 686 687 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 688 if (error == 0) 689 error = newstat_copyout(&buf, args->statbuf); 690 LFREEPATH(path); 691 692 return (error); 693} 694 695#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 696 697int 698linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 699{ 700 cap_rights_t rights; 701 struct mount *mp; 702 struct vnode *vp; 703 int error, save; 704 705 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp); 706 if (error != 0) 707 /* 708 * Linux syncfs() returns only EBADF, however fgetvp() 709 * can return EINVAL in case of file descriptor does 710 * not represent a vnode. XXX. 711 */ 712 return (error); 713 714 mp = vp->v_mount; 715 mtx_lock(&mountlist_mtx); 716 error = vfs_busy(mp, MBF_MNTLSTLOCK); 717 if (error != 0) { 718 /* See comment above. */ 719 mtx_unlock(&mountlist_mtx); 720 goto out; 721 } 722 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 723 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 724 save = curthread_pflags_set(TDP_SYNCIO); 725 vfs_msync(mp, MNT_NOWAIT); 726 VFS_SYNC(mp, MNT_NOWAIT); 727 curthread_pflags_restore(save); 728 vn_finished_write(mp); 729 } 730 vfs_unbusy(mp); 731 732 out: 733 vrele(vp); 734 return (error); 735} 736