The Design and Implementation of the FreeBSD Operating System, Second Edition
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  * Copyright (c) 1994-1995 Søren 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: releng/8.3/sys/compat/linux/linux_stats.c 219666 2011-03-15 13:19:26Z netchild $");
   31 
   32 #include "opt_compat.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/dirent.h>
   36 #include <sys/file.h>
   37 #include <sys/filedesc.h>
   38 #include <sys/proc.h>
   39 #include <sys/malloc.h>
   40 #include <sys/mount.h>
   41 #include <sys/namei.h>
   42 #include <sys/stat.h>
   43 #include <sys/syscallsubr.h>
   44 #include <sys/systm.h>
   45 #include <sys/tty.h>
   46 #include <sys/vnode.h>
   47 #include <sys/conf.h>
   48 #include <sys/fcntl.h>
   49 
   50 #ifdef COMPAT_LINUX32
   51 #include <machine/../linux32/linux.h>
   52 #include <machine/../linux32/linux32_proto.h>
   53 #else
   54 #include <machine/../linux/linux.h>
   55 #include <machine/../linux/linux_proto.h>
   56 #endif
   57 
   58 #include <compat/linux/linux_util.h>
   59 #include <compat/linux/linux_file.h>
   60 
   61 #include <security/mac/mac_framework.h>
   62 
   63 #define LINUX_SHMFS_MAGIC 0x01021994
   64 
   65 static void
   66 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb)
   67 {
   68         int major, minor;
   69 
   70         if (vp->v_type == VCHR && vp->v_rdev != NULL &&
   71             linux_driver_get_major_minor(vp->v_rdev->si_name,
   72             &major, &minor) == 0) {
   73                 sb->st_rdev = (major << 8 | minor);
   74         }
   75 }
   76 
   77 static int
   78 linux_kern_statat(struct thread *td, int flag, int fd, char *path,
   79     enum uio_seg pathseg, struct stat *sbp)
   80 {
   81 
   82         return (kern_statat_vnhook(td, flag, fd, path, pathseg, sbp,
   83             translate_vnhook_major_minor));
   84 }
   85 
   86 static int
   87 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg,
   88     struct stat *sbp)
   89 {
   90 
   91         return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp));
   92 }
   93 
   94 static int
   95 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg,
   96     struct stat *sbp)
   97 {
   98 
   99         return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path,
  100             pathseg, sbp));
  101 }
  102 
  103 /*
  104  * XXX: This was removed from newstat_copyout(), and almost identical
  105  * XXX: code was in stat64_copyout().  findcdev() needs to be replaced
  106  * XXX: with something that does lookup and locking properly.
  107  * XXX: When somebody fixes this: please try to avoid duplicating it.
  108  */
  109 #if 0
  110 static void
  111 disk_foo(struct somestat *tbuf)
  112 {
  113         struct cdevsw *cdevsw;
  114         struct cdev *dev;
  115 
  116         /* Lie about disk drives which are character devices
  117          * in FreeBSD but block devices under Linux.
  118          */
  119         if (S_ISCHR(tbuf.st_mode) &&
  120             (dev = findcdev(buf->st_rdev)) != NULL) {
  121                 cdevsw = dev_refthread(dev);
  122                 if (cdevsw != NULL) {
  123                         if (cdevsw->d_flags & D_DISK) {
  124                                 tbuf.st_mode &= ~S_IFMT;
  125                                 tbuf.st_mode |= S_IFBLK;
  126 
  127                                 /* XXX this may not be quite right */
  128                                 /* Map major number to 0 */
  129                                 tbuf.st_dev = minor(buf->st_dev) & 0xf;
  130                                 tbuf.st_rdev = buf->st_rdev & 0xff;
  131                         }
  132                         dev_relthread(dev);
  133                 }
  134         }
  135 
  136 }
  137 #endif
  138 
  139 static void
  140 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
  141 {
  142         struct file *fp;
  143         struct vnode *vp;
  144         int major, minor;
  145 
  146         if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
  147             fget(td, fd, &fp) != 0)
  148                 return;
  149         vp = fp->f_vnode;
  150         if (vp != NULL && vp->v_rdev != NULL &&
  151             linux_driver_get_major_minor(vp->v_rdev->si_name,
  152                                          &major, &minor) == 0) {
  153                 buf->st_rdev = (major << 8 | minor);
  154         } else if (fp->f_type == DTYPE_PTS) {
  155                 struct tty *tp = fp->f_data;
  156 
  157                 /* Convert the numbers for the slave device. */
  158                 if (linux_driver_get_major_minor(tp->t_dev->si_name,
  159                                          &major, &minor) == 0) {
  160                         buf->st_rdev = (major << 8 | minor);
  161                 }
  162         }
  163         fdrop(fp, td);
  164 }
  165 
  166 static int
  167 newstat_copyout(struct stat *buf, void *ubuf)
  168 {
  169         struct l_newstat tbuf;
  170 
  171         bzero(&tbuf, sizeof(tbuf));
  172         tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
  173         tbuf.st_ino = buf->st_ino;
  174         tbuf.st_mode = buf->st_mode;
  175         tbuf.st_nlink = buf->st_nlink;
  176         tbuf.st_uid = buf->st_uid;
  177         tbuf.st_gid = buf->st_gid;
  178         tbuf.st_rdev = buf->st_rdev;
  179         tbuf.st_size = buf->st_size;
  180         tbuf.st_atime = buf->st_atime;
  181         tbuf.st_mtime = buf->st_mtime;
  182         tbuf.st_ctime = buf->st_ctime;
  183         tbuf.st_blksize = buf->st_blksize;
  184         tbuf.st_blocks = buf->st_blocks;
  185 
  186         return (copyout(&tbuf, ubuf, sizeof(tbuf)));
  187 }
  188 
  189 int
  190 linux_newstat(struct thread *td, struct linux_newstat_args *args)
  191 {
  192         struct stat buf;
  193         char *path;
  194         int error;
  195 
  196         LCONVPATHEXIST(td, args->path, &path);
  197 
  198 #ifdef DEBUG
  199         if (ldebug(newstat))
  200                 printf(ARGS(newstat, "%s, *"), path);
  201 #endif
  202 
  203         error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
  204         LFREEPATH(path);
  205         if (error)
  206                 return (error);
  207         return (newstat_copyout(&buf, args->buf));
  208 }
  209 
  210 int
  211 linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
  212 {
  213         struct stat sb;
  214         char *path;
  215         int error;
  216 
  217         LCONVPATHEXIST(td, args->path, &path);
  218 
  219 #ifdef DEBUG
  220         if (ldebug(newlstat))
  221                 printf(ARGS(newlstat, "%s, *"), path);
  222 #endif
  223 
  224         error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb);
  225         LFREEPATH(path);
  226         if (error)
  227                 return (error);
  228         return (newstat_copyout(&sb, args->buf));
  229 }
  230 
  231 int
  232 linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
  233 {
  234         struct stat buf;
  235         int error;
  236 
  237 #ifdef DEBUG
  238         if (ldebug(newfstat))
  239                 printf(ARGS(newfstat, "%d, *"), args->fd);
  240 #endif
  241 
  242         error = kern_fstat(td, args->fd, &buf);
  243         translate_fd_major_minor(td, args->fd, &buf);
  244         if (!error)
  245                 error = newstat_copyout(&buf, args->buf);
  246 
  247         return (error);
  248 }
  249 
  250 static int
  251 stat_copyout(struct stat *buf, void *ubuf)
  252 {
  253         struct l_stat lbuf;
  254         
  255         bzero(&lbuf, sizeof(lbuf));
  256         lbuf.st_dev = buf->st_dev;
  257         lbuf.st_ino = buf->st_ino;
  258         lbuf.st_mode = buf->st_mode;
  259         lbuf.st_nlink = buf->st_nlink;
  260         lbuf.st_uid = buf->st_uid;
  261         lbuf.st_gid = buf->st_gid;
  262         lbuf.st_rdev = buf->st_rdev;
  263         if (buf->st_size < (quad_t)1 << 32)
  264                 lbuf.st_size = buf->st_size;
  265         else
  266                 lbuf.st_size = -2;
  267         lbuf.st_atime = buf->st_atime;
  268         lbuf.st_mtime = buf->st_mtime;
  269         lbuf.st_ctime = buf->st_ctime;
  270         lbuf.st_blksize = buf->st_blksize;
  271         lbuf.st_blocks = buf->st_blocks;
  272         lbuf.st_flags = buf->st_flags;
  273         lbuf.st_gen = buf->st_gen;
  274 
  275         return (copyout(&lbuf, ubuf, sizeof(lbuf)));
  276 }
  277 
  278 int
  279 linux_stat(struct thread *td, struct linux_stat_args *args)
  280 {
  281         struct stat buf;
  282         char *path;
  283         int error;
  284 
  285         LCONVPATHEXIST(td, args->path, &path);
  286 
  287 #ifdef DEBUG
  288         if (ldebug(stat))
  289                 printf(ARGS(stat, "%s, *"), path);
  290 #endif
  291         error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
  292         if (error) {
  293                 LFREEPATH(path);
  294                 return (error);
  295         }
  296         LFREEPATH(path);
  297         return(stat_copyout(&buf, args->up));
  298 }
  299 
  300 int
  301 linux_lstat(struct thread *td, struct linux_lstat_args *args)
  302 {
  303         struct stat buf;
  304         char *path;
  305         int error;
  306 
  307         LCONVPATHEXIST(td, args->path, &path);
  308 
  309 #ifdef DEBUG
  310         if (ldebug(lstat))
  311                 printf(ARGS(lstat, "%s, *"), path);
  312 #endif
  313         error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
  314         if (error) {
  315                 LFREEPATH(path);
  316                 return (error);
  317         }
  318         LFREEPATH(path);
  319         return(stat_copyout(&buf, args->up));
  320 }
  321 
  322 /* XXX - All fields of type l_int are defined as l_long on i386 */
  323 struct l_statfs {
  324         l_int           f_type;
  325         l_int           f_bsize;
  326         l_int           f_blocks;
  327         l_int           f_bfree;
  328         l_int           f_bavail;
  329         l_int           f_files;
  330         l_int           f_ffree;
  331         l_fsid_t        f_fsid;
  332         l_int           f_namelen;
  333         l_int           f_spare[6];
  334 };
  335 
  336 #define LINUX_CODA_SUPER_MAGIC  0x73757245L
  337 #define LINUX_EXT2_SUPER_MAGIC  0xEF53L
  338 #define LINUX_HPFS_SUPER_MAGIC  0xf995e849L
  339 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
  340 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
  341 #define LINUX_NCP_SUPER_MAGIC   0x564cL
  342 #define LINUX_NFS_SUPER_MAGIC   0x6969L
  343 #define LINUX_NTFS_SUPER_MAGIC  0x5346544EL
  344 #define LINUX_PROC_SUPER_MAGIC  0x9fa0L
  345 #define LINUX_UFS_SUPER_MAGIC   0x00011954L     /* XXX - UFS_MAGIC in Linux */
  346 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L
  347 
  348 static long
  349 bsd_to_linux_ftype(const char *fstypename)
  350 {
  351         int i;
  352         static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
  353                 {"ufs",     LINUX_UFS_SUPER_MAGIC},
  354                 {"cd9660",  LINUX_ISOFS_SUPER_MAGIC},
  355                 {"nfs",     LINUX_NFS_SUPER_MAGIC},
  356                 {"ext2fs",  LINUX_EXT2_SUPER_MAGIC},
  357                 {"procfs",  LINUX_PROC_SUPER_MAGIC},
  358                 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
  359                 {"ntfs",    LINUX_NTFS_SUPER_MAGIC},
  360                 {"nwfs",    LINUX_NCP_SUPER_MAGIC},
  361                 {"hpfs",    LINUX_HPFS_SUPER_MAGIC},
  362                 {"coda",    LINUX_CODA_SUPER_MAGIC},
  363                 {"devfs",   LINUX_DEVFS_SUPER_MAGIC},
  364                 {NULL,      0L}};
  365 
  366         for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
  367                 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
  368                         return (b2l_tbl[i].linux_type);
  369 
  370         return (0L);
  371 }
  372 
  373 static void
  374 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
  375 {
  376 
  377         linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
  378         linux_statfs->f_bsize = bsd_statfs->f_bsize;
  379         linux_statfs->f_blocks = bsd_statfs->f_blocks;
  380         linux_statfs->f_bfree = bsd_statfs->f_bfree;
  381         linux_statfs->f_bavail = bsd_statfs->f_bavail;
  382         linux_statfs->f_ffree = bsd_statfs->f_ffree;
  383         linux_statfs->f_files = bsd_statfs->f_files;
  384         linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
  385         linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
  386         linux_statfs->f_namelen = MAXNAMLEN;
  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, dev_shm;
  396 
  397         LCONVPATHEXIST(td, args->path, &path);
  398 
  399 #ifdef DEBUG
  400         if (ldebug(statfs))
  401                 printf(ARGS(statfs, "%s, *"), path);
  402 #endif
  403         dev_shm = 0;
  404         error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
  405         if (strncmp(path, "/dev/shm", sizeof("/dev/shm") - 1) == 0)
  406                 dev_shm = (path[8] == '\0'
  407                     || (path[8] == '/' && path[9] == '\0'));
  408         LFREEPATH(path);
  409         if (error)
  410                 return (error);
  411         bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
  412         if (dev_shm)
  413                 linux_statfs.f_type = LINUX_SHMFS_MAGIC;
  414         return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
  415 }
  416 
  417 static void
  418 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
  419 {
  420 
  421         linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
  422         linux_statfs->f_bsize = bsd_statfs->f_bsize;
  423         linux_statfs->f_blocks = bsd_statfs->f_blocks;
  424         linux_statfs->f_bfree = bsd_statfs->f_bfree;
  425         linux_statfs->f_bavail = bsd_statfs->f_bavail;
  426         linux_statfs->f_ffree = bsd_statfs->f_ffree;
  427         linux_statfs->f_files = bsd_statfs->f_files;
  428         linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
  429         linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
  430         linux_statfs->f_namelen = MAXNAMLEN;
  431 }
  432 
  433 int
  434 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
  435 {
  436         struct l_statfs64 linux_statfs;
  437         struct statfs bsd_statfs;
  438         char *path;
  439         int error;
  440 
  441         if (args->bufsize != sizeof(struct l_statfs64))
  442                 return EINVAL;
  443 
  444         LCONVPATHEXIST(td, args->path, &path);
  445 
  446 #ifdef DEBUG
  447         if (ldebug(statfs64))
  448                 printf(ARGS(statfs64, "%s, *"), path);
  449 #endif
  450         error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
  451         LFREEPATH(path);
  452         if (error)
  453                 return (error);
  454         bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
  455         return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
  456 }
  457 
  458 int
  459 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
  460 {
  461         struct l_statfs linux_statfs;
  462         struct statfs bsd_statfs;
  463         int error;
  464 
  465 #ifdef DEBUG
  466         if (ldebug(fstatfs))
  467                 printf(ARGS(fstatfs, "%d, *"), args->fd);
  468 #endif
  469         error = kern_fstatfs(td, args->fd, &bsd_statfs);
  470         if (error)
  471                 return error;
  472         bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
  473         return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
  474 }
  475 
  476 struct l_ustat
  477 {
  478         l_daddr_t       f_tfree;
  479         l_ino_t         f_tinode;
  480         char            f_fname[6];
  481         char            f_fpack[6];
  482 };
  483 
  484 int
  485 linux_ustat(struct thread *td, struct linux_ustat_args *args)
  486 {
  487 #ifdef DEBUG
  488         if (ldebug(ustat))
  489                 printf(ARGS(ustat, "%d, *"), args->dev);
  490 #endif
  491 
  492         return (EOPNOTSUPP);
  493 }
  494 
  495 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  496 
  497 static int
  498 stat64_copyout(struct stat *buf, void *ubuf)
  499 {
  500         struct l_stat64 lbuf;
  501 
  502         bzero(&lbuf, sizeof(lbuf));
  503         lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
  504         lbuf.st_ino = buf->st_ino;
  505         lbuf.st_mode = buf->st_mode;
  506         lbuf.st_nlink = buf->st_nlink;
  507         lbuf.st_uid = buf->st_uid;
  508         lbuf.st_gid = buf->st_gid;
  509         lbuf.st_rdev = buf->st_rdev;
  510         lbuf.st_size = buf->st_size;
  511         lbuf.st_atime = buf->st_atime;
  512         lbuf.st_mtime = buf->st_mtime;
  513         lbuf.st_ctime = buf->st_ctime;
  514         lbuf.st_blksize = buf->st_blksize;
  515         lbuf.st_blocks = buf->st_blocks;
  516 
  517         /*
  518          * The __st_ino field makes all the difference. In the Linux kernel
  519          * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
  520          * but without the assignment to __st_ino the runtime linker refuses
  521          * to mmap(2) any shared libraries. I guess it's broken alright :-)
  522          */
  523         lbuf.__st_ino = buf->st_ino;
  524 
  525         return (copyout(&lbuf, ubuf, sizeof(lbuf)));
  526 }
  527 
  528 int
  529 linux_stat64(struct thread *td, struct linux_stat64_args *args)
  530 {
  531         struct stat buf;
  532         char *filename;
  533         int error;
  534 
  535         LCONVPATHEXIST(td, args->filename, &filename);
  536 
  537 #ifdef DEBUG
  538         if (ldebug(stat64))
  539                 printf(ARGS(stat64, "%s, *"), filename);
  540 #endif
  541 
  542         error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
  543         LFREEPATH(filename);
  544         if (error)
  545                 return (error);
  546         return (stat64_copyout(&buf, args->statbuf));
  547 }
  548 
  549 int
  550 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
  551 {
  552         struct stat sb;
  553         char *filename;
  554         int error;
  555 
  556         LCONVPATHEXIST(td, args->filename, &filename);
  557 
  558 #ifdef DEBUG
  559         if (ldebug(lstat64))
  560                 printf(ARGS(lstat64, "%s, *"), args->filename);
  561 #endif
  562 
  563         error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
  564         LFREEPATH(filename);
  565         if (error)
  566                 return (error);
  567         return (stat64_copyout(&sb, args->statbuf));
  568 }
  569 
  570 int
  571 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
  572 {
  573         struct stat buf;
  574         int error;
  575 
  576 #ifdef DEBUG
  577         if (ldebug(fstat64))
  578                 printf(ARGS(fstat64, "%d, *"), args->fd);
  579 #endif
  580 
  581         error = kern_fstat(td, args->fd, &buf);
  582         translate_fd_major_minor(td, args->fd, &buf);
  583         if (!error)
  584                 error = stat64_copyout(&buf, args->statbuf);
  585 
  586         return (error);
  587 }
  588 
  589 int
  590 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
  591 {
  592         char *path;
  593         int error, dfd, flag;
  594         struct stat buf;
  595 
  596         if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
  597                 return (EINVAL);
  598         flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
  599             AT_SYMLINK_NOFOLLOW : 0;
  600 
  601         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  602         LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
  603 
  604 #ifdef DEBUG
  605         if (ldebug(fstatat64))
  606                 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
  607 #endif
  608 
  609         error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
  610         if (!error)
  611                 error = stat64_copyout(&buf, args->statbuf);
  612         LFREEPATH(path);
  613 
  614         return (error);
  615 }
  616 
  617 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */

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