/* Convert between the kernel's `struct stat' format, and libc's.

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <sys/stat.h>

#include <kernel_stat.h>

#include <kernel-features.h>

#ifdef STAT_IS_KERNEL_STAT

/* Dummy.  */

struct kernel_stat;

#else

#include <string.h>

#if XSTAT_IS_XSTAT64

int

__xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf)

{

  switch (vers)

    {

    case _STAT_VER_KERNEL:

      /* Nothing to do.  The struct is in the form the kernel expects.

         We should have short-circuted before we got here, but for

         completeness... */

      *(struct kernel_stat *) ubuf = *kbuf;

      break;

    case _STAT_VER_LINUX:

      {

	struct stat *buf = ubuf;

	/* Convert to current kernel version of `struct stat'.  */

	buf->st_dev = kbuf->st_dev;

#ifdef _HAVE_STAT___PAD1

	buf->__pad1 = 0;

#endif

	buf->st_ino = kbuf->st_ino;

	buf->st_mode = kbuf->st_mode;

	buf->st_nlink = kbuf->st_nlink;

	buf->st_uid = kbuf->st_uid;

	buf->st_gid = kbuf->st_gid;

	buf->st_rdev = kbuf->st_rdev;

#ifdef _HAVE_STAT___PAD2

	buf->__pad2 = 0;

#endif

	buf->st_size = kbuf->st_size;

	buf->st_blksize = kbuf->st_blksize;

	buf->st_blocks = kbuf->st_blocks;

#ifdef _HAVE_STAT_NSEC

	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;

	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;

	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;

	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;

	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;

	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;

#else

	buf->st_atime = kbuf->st_atime;

	buf->st_mtime = kbuf->st_mtime;

	buf->st_ctime = kbuf->st_ctime;

#endif

#ifdef _HAVE_STAT___UNUSED1

	buf->__glibc_reserved1 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED2

	buf->__glibc_reserved2 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED3

	buf->__glibc_reserved3 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED4

	buf->__glibc_reserved4 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED5

	buf->__glibc_reserved5 = 0;

#endif

      }

      break;

    default:

      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

    }

  return 0;

}

#endif

int

__xstat64_conv (int vers, struct kernel_stat *kbuf, void *ubuf)

{

#if XSTAT_IS_XSTAT64

  return __xstat_conv (vers, kbuf, ubuf);

#else

  switch (vers)

    {

    case _STAT_VER_LINUX:

      {

	struct stat64 *buf = ubuf;

	/* Convert to current kernel version of `struct stat64'.  */

	buf->st_dev = kbuf->st_dev;

#ifdef _HAVE_STAT64___PAD1

	buf->__pad1 = 0;

#endif

	buf->st_ino = kbuf->st_ino;

#ifdef _HAVE_STAT64___ST_INO

	buf->__st_ino = kbuf->st_ino;

#endif

	buf->st_mode = kbuf->st_mode;

	buf->st_nlink = kbuf->st_nlink;

	buf->st_uid = kbuf->st_uid;

	buf->st_gid = kbuf->st_gid;

	buf->st_rdev = kbuf->st_rdev;

#ifdef _HAVE_STAT64___PAD2

	buf->__pad2 = 0;

#endif

	buf->st_size = kbuf->st_size;

	buf->st_blksize = kbuf->st_blksize;

	buf->st_blocks = kbuf->st_blocks;

#ifdef _HAVE_STAT64_NSEC

	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;

	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;

	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;

	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;

	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;

	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;

#else

	buf->st_atime = kbuf->st_atime;

	buf->st_mtime = kbuf->st_mtime;

	buf->st_ctime = kbuf->st_ctime;

#endif

#ifdef _HAVE_STAT64___UNUSED1

	buf->__glibc_reserved1 = 0;

#endif

#ifdef _HAVE_STAT64___UNUSED2

	buf->__glibc_reserved2 = 0;

#endif

#ifdef _HAVE_STAT64___UNUSED3

	buf->__glibc_reserved3 = 0;

#endif

#ifdef _HAVE_STAT64___UNUSED4

	buf->__glibc_reserved4 = 0;

#endif

#ifdef _HAVE_STAT64___UNUSED5

	buf->__glibc_reserved5 = 0;

#endif

      }

      break;

      /* If struct stat64 is different from struct stat then

	 _STAT_VER_KERNEL does not make sense.  */

    case _STAT_VER_KERNEL:

    default:

      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

    }

  return 0;

#endif

}

int

__xstat32_conv (int vers, struct stat64 *kbuf, struct stat *buf)

{

  switch (vers)

    {

    case _STAT_VER_LINUX:

      {

	/* Convert current kernel version of `struct stat64' to

           `struct stat'.  */

	buf->st_dev = kbuf->st_dev;

#ifdef _HAVE_STAT___PAD1

	buf->__pad1 = 0;

#endif

#ifdef _HAVE_STAT64___ST_INO

# if !__ASSUME_ST_INO_64_BIT

	if (kbuf->st_ino == 0)

	  buf->st_ino = kbuf->__st_ino;

	else

# endif

	  {

	    buf->st_ino = kbuf->st_ino;

	    if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)

		&& buf->st_ino != kbuf->st_ino)

	      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);

	  }

#else

	buf->st_ino = kbuf->st_ino;

	if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)

	    && buf->st_ino != kbuf->st_ino)

	  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);

#endif

	buf->st_mode = kbuf->st_mode;

	buf->st_nlink = kbuf->st_nlink;

	buf->st_uid = kbuf->st_uid;

	buf->st_gid = kbuf->st_gid;

	buf->st_rdev = kbuf->st_rdev;

#ifdef _HAVE_STAT___PAD2

	buf->__pad2 = 0;

#endif

	buf->st_size = kbuf->st_size;

	/* Check for overflow.  */

	if (sizeof (buf->st_size) != sizeof (kbuf->st_size)

	    && buf->st_size != kbuf->st_size)

	  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);

	buf->st_blksize = kbuf->st_blksize;

	buf->st_blocks = kbuf->st_blocks;

	/* Check for overflow.  */

	if (sizeof (buf->st_blocks) != sizeof (kbuf->st_blocks)

	    && buf->st_blocks != kbuf->st_blocks)

	  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);

#ifdef _HAVE_STAT_NSEC

	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;

	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;

	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;

	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;

	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;

	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;

#else

	buf->st_atime = kbuf->st_atime;

	buf->st_mtime = kbuf->st_mtime;

	buf->st_ctime = kbuf->st_ctime;

#endif

#ifdef _HAVE_STAT___UNUSED1

	buf->__glibc_reserved1 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED2

	buf->__glibc_reserved2 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED3

	buf->__glibc_reserved3 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED4

	buf->__glibc_reserved4 = 0;

#endif

#ifdef _HAVE_STAT___UNUSED5

	buf->__glibc_reserved5 = 0;

#endif

      }

      break;

      /* If struct stat64 is different from struct stat then

	 _STAT_VER_KERNEL does not make sense.  */

    case _STAT_VER_KERNEL:

    default:

      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

    }

  return 0;

}

#endif