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/10.2/sys/compat/linux/linux_stats.c 231378 2012-02-10 12:35:57Z ed $");
   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 #define LINUX_SHMFS_MAGIC 0x01021994
   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_vnhook(td, flag, fd, path, pathseg, sbp,
   81             translate_vnhook_major_minor));
   82 }
   83 
   84 static int
   85 linux_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 
   92 static int
   93 linux_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
  108 static void
  109 disk_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 
  137 static void
  138 translate_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 
  167 static int
  168 newstat_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 
  193 int
  194 linux_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 
  214 int
  215 linux_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 
  235 int
  236 linux_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 static int
  255 stat_copyout(struct stat *buf, void *ubuf)
  256 {
  257         struct l_stat lbuf;
  258         
  259         bzero(&lbuf, sizeof(lbuf));
  260         lbuf.st_dev = buf->st_dev;
  261         lbuf.st_ino = buf->st_ino;
  262         lbuf.st_mode = buf->st_mode;
  263         lbuf.st_nlink = buf->st_nlink;
  264         lbuf.st_uid = buf->st_uid;
  265         lbuf.st_gid = buf->st_gid;
  266         lbuf.st_rdev = buf->st_rdev;
  267         if (buf->st_size < (quad_t)1 << 32)
  268                 lbuf.st_size = buf->st_size;
  269         else
  270                 lbuf.st_size = -2;
  271         lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
  272         lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
  273         lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
  274         lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
  275         lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
  276         lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
  277         lbuf.st_blksize = buf->st_blksize;
  278         lbuf.st_blocks = buf->st_blocks;
  279         lbuf.st_flags = buf->st_flags;
  280         lbuf.st_gen = buf->st_gen;
  281 
  282         return (copyout(&lbuf, ubuf, sizeof(lbuf)));
  283 }
  284 
  285 int
  286 linux_stat(struct thread *td, struct linux_stat_args *args)
  287 {
  288         struct stat buf;
  289         char *path;
  290         int error;
  291 
  292         LCONVPATHEXIST(td, args->path, &path);
  293 
  294 #ifdef DEBUG
  295         if (ldebug(stat))
  296                 printf(ARGS(stat, "%s, *"), path);
  297 #endif
  298         error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
  299         if (error) {
  300                 LFREEPATH(path);
  301                 return (error);
  302         }
  303         LFREEPATH(path);
  304         return(stat_copyout(&buf, args->up));
  305 }
  306 
  307 int
  308 linux_lstat(struct thread *td, struct linux_lstat_args *args)
  309 {
  310         struct stat buf;
  311         char *path;
  312         int error;
  313 
  314         LCONVPATHEXIST(td, args->path, &path);
  315 
  316 #ifdef DEBUG
  317         if (ldebug(lstat))
  318                 printf(ARGS(lstat, "%s, *"), path);
  319 #endif
  320         error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
  321         if (error) {
  322                 LFREEPATH(path);
  323                 return (error);
  324         }
  325         LFREEPATH(path);
  326         return(stat_copyout(&buf, args->up));
  327 }
  328 
  329 /* XXX - All fields of type l_int are defined as l_long on i386 */
  330 struct l_statfs {
  331         l_int           f_type;
  332         l_int           f_bsize;
  333         l_int           f_blocks;
  334         l_int           f_bfree;
  335         l_int           f_bavail;
  336         l_int           f_files;
  337         l_int           f_ffree;
  338         l_fsid_t        f_fsid;
  339         l_int           f_namelen;
  340         l_int           f_spare[6];
  341 };
  342 
  343 #define LINUX_CODA_SUPER_MAGIC  0x73757245L
  344 #define LINUX_EXT2_SUPER_MAGIC  0xEF53L
  345 #define LINUX_HPFS_SUPER_MAGIC  0xf995e849L
  346 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
  347 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
  348 #define LINUX_NCP_SUPER_MAGIC   0x564cL
  349 #define LINUX_NFS_SUPER_MAGIC   0x6969L
  350 #define LINUX_NTFS_SUPER_MAGIC  0x5346544EL
  351 #define LINUX_PROC_SUPER_MAGIC  0x9fa0L
  352 #define LINUX_UFS_SUPER_MAGIC   0x00011954L     /* XXX - UFS_MAGIC in Linux */
  353 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L
  354 
  355 static long
  356 bsd_to_linux_ftype(const char *fstypename)
  357 {
  358         int i;
  359         static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
  360                 {"ufs",     LINUX_UFS_SUPER_MAGIC},
  361                 {"cd9660",  LINUX_ISOFS_SUPER_MAGIC},
  362                 {"nfs",     LINUX_NFS_SUPER_MAGIC},
  363                 {"ext2fs",  LINUX_EXT2_SUPER_MAGIC},
  364                 {"procfs",  LINUX_PROC_SUPER_MAGIC},
  365                 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
  366                 {"ntfs",    LINUX_NTFS_SUPER_MAGIC},
  367                 {"nwfs",    LINUX_NCP_SUPER_MAGIC},
  368                 {"hpfs",    LINUX_HPFS_SUPER_MAGIC},
  369                 {"coda",    LINUX_CODA_SUPER_MAGIC},
  370                 {"devfs",   LINUX_DEVFS_SUPER_MAGIC},
  371                 {NULL,      0L}};
  372 
  373         for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
  374                 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
  375                         return (b2l_tbl[i].linux_type);
  376 
  377         return (0L);
  378 }
  379 
  380 static void
  381 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
  382 {
  383 
  384         linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
  385         linux_statfs->f_bsize = bsd_statfs->f_bsize;
  386         linux_statfs->f_blocks = bsd_statfs->f_blocks;
  387         linux_statfs->f_bfree = bsd_statfs->f_bfree;
  388         linux_statfs->f_bavail = bsd_statfs->f_bavail;
  389         linux_statfs->f_ffree = bsd_statfs->f_ffree;
  390         linux_statfs->f_files = bsd_statfs->f_files;
  391         linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
  392         linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
  393         linux_statfs->f_namelen = MAXNAMLEN;
  394 }
  395 
  396 int
  397 linux_statfs(struct thread *td, struct linux_statfs_args *args)
  398 {
  399         struct l_statfs linux_statfs;
  400         struct statfs bsd_statfs;
  401         char *path;
  402         int error, dev_shm;
  403 
  404         LCONVPATHEXIST(td, args->path, &path);
  405 
  406 #ifdef DEBUG
  407         if (ldebug(statfs))
  408                 printf(ARGS(statfs, "%s, *"), path);
  409 #endif
  410         dev_shm = 0;
  411         error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
  412         if (strncmp(path, "/dev/shm", sizeof("/dev/shm") - 1) == 0)
  413                 dev_shm = (path[8] == '\0'
  414                     || (path[8] == '/' && path[9] == '\0'));
  415         LFREEPATH(path);
  416         if (error)
  417                 return (error);
  418         bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
  419         if (dev_shm)
  420                 linux_statfs.f_type = LINUX_SHMFS_MAGIC;
  421         return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
  422 }
  423 
  424 static void
  425 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
  426 {
  427 
  428         linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
  429         linux_statfs->f_bsize = bsd_statfs->f_bsize;
  430         linux_statfs->f_blocks = bsd_statfs->f_blocks;
  431         linux_statfs->f_bfree = bsd_statfs->f_bfree;
  432         linux_statfs->f_bavail = bsd_statfs->f_bavail;
  433         linux_statfs->f_ffree = bsd_statfs->f_ffree;
  434         linux_statfs->f_files = bsd_statfs->f_files;
  435         linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
  436         linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
  437         linux_statfs->f_namelen = MAXNAMLEN;
  438 }
  439 
  440 int
  441 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
  442 {
  443         struct l_statfs64 linux_statfs;
  444         struct statfs bsd_statfs;
  445         char *path;
  446         int error;
  447 
  448         if (args->bufsize != sizeof(struct l_statfs64))
  449                 return EINVAL;
  450 
  451         LCONVPATHEXIST(td, args->path, &path);
  452 
  453 #ifdef DEBUG
  454         if (ldebug(statfs64))
  455                 printf(ARGS(statfs64, "%s, *"), path);
  456 #endif
  457         error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
  458         LFREEPATH(path);
  459         if (error)
  460                 return (error);
  461         bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
  462         return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
  463 }
  464 
  465 int
  466 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
  467 {
  468         struct l_statfs linux_statfs;
  469         struct statfs bsd_statfs;
  470         int error;
  471 
  472 #ifdef DEBUG
  473         if (ldebug(fstatfs))
  474                 printf(ARGS(fstatfs, "%d, *"), args->fd);
  475 #endif
  476         error = kern_fstatfs(td, args->fd, &bsd_statfs);
  477         if (error)
  478                 return error;
  479         bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
  480         return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
  481 }
  482 
  483 struct l_ustat
  484 {
  485         l_daddr_t       f_tfree;
  486         l_ino_t         f_tinode;
  487         char            f_fname[6];
  488         char            f_fpack[6];
  489 };
  490 
  491 int
  492 linux_ustat(struct thread *td, struct linux_ustat_args *args)
  493 {
  494 #ifdef DEBUG
  495         if (ldebug(ustat))
  496                 printf(ARGS(ustat, "%d, *"), args->dev);
  497 #endif
  498 
  499         return (EOPNOTSUPP);
  500 }
  501 
  502 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  503 
  504 static int
  505 stat64_copyout(struct stat *buf, void *ubuf)
  506 {
  507         struct l_stat64 lbuf;
  508 
  509         bzero(&lbuf, sizeof(lbuf));
  510         lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
  511         lbuf.st_ino = buf->st_ino;
  512         lbuf.st_mode = buf->st_mode;
  513         lbuf.st_nlink = buf->st_nlink;
  514         lbuf.st_uid = buf->st_uid;
  515         lbuf.st_gid = buf->st_gid;
  516         lbuf.st_rdev = buf->st_rdev;
  517         lbuf.st_size = buf->st_size;
  518         lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
  519         lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
  520         lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
  521         lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
  522         lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
  523         lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
  524         lbuf.st_blksize = buf->st_blksize;
  525         lbuf.st_blocks = buf->st_blocks;
  526 
  527         /*
  528          * The __st_ino field makes all the difference. In the Linux kernel
  529          * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
  530          * but without the assignment to __st_ino the runtime linker refuses
  531          * to mmap(2) any shared libraries. I guess it's broken alright :-)
  532          */
  533         lbuf.__st_ino = buf->st_ino;
  534 
  535         return (copyout(&lbuf, ubuf, sizeof(lbuf)));
  536 }
  537 
  538 int
  539 linux_stat64(struct thread *td, struct linux_stat64_args *args)
  540 {
  541         struct stat buf;
  542         char *filename;
  543         int error;
  544 
  545         LCONVPATHEXIST(td, args->filename, &filename);
  546 
  547 #ifdef DEBUG
  548         if (ldebug(stat64))
  549                 printf(ARGS(stat64, "%s, *"), filename);
  550 #endif
  551 
  552         error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
  553         LFREEPATH(filename);
  554         if (error)
  555                 return (error);
  556         return (stat64_copyout(&buf, args->statbuf));
  557 }
  558 
  559 int
  560 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
  561 {
  562         struct stat sb;
  563         char *filename;
  564         int error;
  565 
  566         LCONVPATHEXIST(td, args->filename, &filename);
  567 
  568 #ifdef DEBUG
  569         if (ldebug(lstat64))
  570                 printf(ARGS(lstat64, "%s, *"), args->filename);
  571 #endif
  572 
  573         error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
  574         LFREEPATH(filename);
  575         if (error)
  576                 return (error);
  577         return (stat64_copyout(&sb, args->statbuf));
  578 }
  579 
  580 int
  581 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
  582 {
  583         struct stat buf;
  584         int error;
  585 
  586 #ifdef DEBUG
  587         if (ldebug(fstat64))
  588                 printf(ARGS(fstat64, "%d, *"), args->fd);
  589 #endif
  590 
  591         error = kern_fstat(td, args->fd, &buf);
  592         translate_fd_major_minor(td, args->fd, &buf);
  593         if (!error)
  594                 error = stat64_copyout(&buf, args->statbuf);
  595 
  596         return (error);
  597 }
  598 
  599 int
  600 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
  601 {
  602         char *path;
  603         int error, dfd, flag;
  604         struct stat buf;
  605 
  606         if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
  607                 return (EINVAL);
  608         flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
  609             AT_SYMLINK_NOFOLLOW : 0;
  610 
  611         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  612         LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
  613 
  614 #ifdef DEBUG
  615         if (ldebug(fstatat64))
  616                 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
  617 #endif
  618 
  619         error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
  620         if (!error)
  621                 error = stat64_copyout(&buf, args->statbuf);
  622         LFREEPATH(path);
  623 
  624         return (error);
  625 }
  626 
  627 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */

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