linux: Add {f}stat{at} y2038 support

A new struct __stat{64}_t64 type is added with the required
__timespec64 time definition.  Only LFS is added, 64-bit time with
32-bit offsets is not supposed to be supported (no existing glibc
configuration supports such a combination).  It is done with an extra
__NR_statx call plus a conversion to the new __stat{64}_t64 type.
The statx call is done only for 32-bit time_t ABIs.

Internally some extra routines to copy from/to struct stat{64}
to struct __stat{64} used on multiple implementations (stat, fstat,
lstat, and fstatat) are added on a extra implementation
(stat_t64_cp.c).  Alse some extra routines to copy from statx to
__stat{64} is added on statx_cp.c.

Checked with a build for all affected ABIs. I also checked on x86_64,
i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x.

Reviewed-by: Lukasz Majewski <lukma@denx.de>

14 files changed, 354 insertions, 47 deletions

diff --git a/include/sys/stat.h b/include/sys/stat.h
index 3d4ea7f0c7..9f7f3a8e3b 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -3,6 +3,8 @@
 
 #ifndef _ISOMAC
 # include <xstatver.h>
+# include <struct___timespec64.h>
+# include <struct_stat_time64.h>
 # include <stdbool.h>
 
 static inline bool
@@ -44,6 +46,24 @@ hidden_proto (__lstat64)
 hidden_proto (__fstatat64)
 # endif
 
+# if __TIMESIZE == 64
+#  define __stat64_time64  __stat64
+#  define __fstat64_time64  __fstat64
+#  define __lstat64_time64  __lstat64
+#  define __fstatat_time64  __fstatat
+#  define __fstatat64_time64  __fstatat64
+# else
+extern int __stat64_time64 (const char *file, struct __stat64_t64 *buf);
+hidden_proto (__stat64_time64);
+extern int __lstat64_time64 (const char *file, struct __stat64_t64 *buf);
+hidden_proto (__lstat64_time64);
+extern int __fstat64_time64 (int fd, struct __stat64_t64 *buf);
+hidden_proto (__fstat64_time64);
+extern int __fstatat64_time64 (int dirfd, const char *pathname,
+			       struct __stat64_t64 *buf, int flags);
+hidden_proto (__fstatat64_time64);
+# endif
+
 extern int __chmod (const char *__file, __mode_t __mode);
 libc_hidden_proto (__chmod)
 extern int __fchmod (int __fd, __mode_t __mode);
diff --git a/sysdeps/generic/struct_stat_time64.h b/sysdeps/generic/struct_stat_time64.h
new file mode 100644
index 0000000000..303718d1bf
--- /dev/null
+++ b/sysdeps/generic/struct_stat_time64.h
@@ -0,0 +1,6 @@
+#ifndef _BITS_STRUCT_STAT_TIME64_H
+#define _BITS_STRUCT_STAT_TIME64_H 1
+
+#define __stat64_t64 stat64
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index e6eb92f381..d760debf40 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -275,7 +275,7 @@ sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
 		   open_nocancel open64_nocancel \
 		   openat_nocancel openat64_nocancel \
 		   read_nocancel pread64_nocancel \
-		   write_nocancel statx_cp
+		   write_nocancel statx_cp stat_t64_cp
 
 sysdep_headers += bits/fcntl-linux.h
 
diff --git a/sysdeps/unix/sysv/linux/fstat64.c b/sysdeps/unix/sysv/linux/fstat64.c
index c2ff1ff577..67667e79d8 100644
--- a/sysdeps/unix/sysv/linux/fstat64.c
+++ b/sysdeps/unix/sysv/linux/fstat64.c
@@ -19,16 +19,30 @@
 #define __fstat __redirect___fstat
 #define fstat   __redirect_fstat
 #include <sys/stat.h>
-#undef __fstat
-#undef fstat
 #include <fcntl.h>
 #include <kernel_stat.h>
+#include <stat_t64_cp.h>
+
+int
+__fstat64_time64 (int fd, struct __stat64_t64 *buf)
+{
+  return __fstatat64_time64 (fd, "", buf, AT_EMPTY_PATH);
+}
+#if __TIMESIZE != 64
+hidden_def (__fstat64_time64)
 
 int
 __fstat64 (int fd, struct stat64 *buf)
 {
-  return __fstatat64 (fd, "", buf, AT_EMPTY_PATH);
+  struct __stat64_t64 st_t64;
+  return __fstat64_time64 (fd, &st_t64)
+	 ?: __cp_stat64_t64_stat64 (&st_t64, buf);
 }
+#endif
+
+#undef __fstat
+#undef fstat
+
 hidden_def (__fstat64)
 weak_alias (__fstat64, fstat64)
 
diff --git a/sysdeps/unix/sysv/linux/fstatat64.c b/sysdeps/unix/sysv/linux/fstatat64.c
index d9d3ea5e64..ae8fc101c5 100644
--- a/sysdeps/unix/sysv/linux/fstatat64.c
+++ b/sysdeps/unix/sysv/linux/fstatat64.c
@@ -19,56 +19,105 @@
 #define __fstatat __redirect___fstatat
 #define fstatat   __redirect_fstatat
 #include <sys/stat.h>
-#undef __fstatat
-#undef fstatat
 #include <fcntl.h>
-
+#include <string.h>
 #include <kernel_stat.h>
 #include <sysdep.h>
-
+#include <time.h>
 #include <statx_cp.h>
 #include <kstat_cp.h>
+#include <stat_t64_cp.h>
 
 int
-__fstatat64 (int fd, const char *file, struct stat64 *buf, int flag)
+__fstatat64_time64 (int fd, const char *file, struct __stat64_t64 *buf,
+		    int flag)
 {
+  int r;
+
+#if (__WORDSIZE == 32 \
+     && (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32))
+  /* 32-bit kABI with default 64-bit time_t, e.g. arc, riscv32.   Also
+     64-bit time_t support is done through statx syscall.  */
+  struct statx tmp;
+  r = INLINE_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
+			   STATX_BASIC_STATS, &tmp);
+  if (r == 0 || errno != ENOSYS)
+    {
+      if (r == 0)
+	__cp_stat64_t64_statx (buf, &tmp);
+      return r;
+    }
+#endif
+
 #if XSTAT_IS_XSTAT64
 # ifdef __NR_newfstatat
   /* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
      x86_64.  */
-  return INLINE_SYSCALL_CALL (newfstatat, fd, file, buf, flag);
+  r = INLINE_SYSCALL_CALL (newfstatat, fd, file, buf, flag);
 # elif defined __NR_fstatat64
 #  if STAT64_IS_KERNEL_STAT64
-  /* 64-bit kABI outlier, e.g. alpha.  */
-  return INLINE_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
+  /* 64-bit kABI outlier, e.g. alpha  */
+  r = INLINE_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
 #  else
   /* 64-bit kABI outlier, e.g. sparc64.  */
   struct kernel_stat64 kst64;
-  int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &kst64, flag);
-  return r ?: __cp_stat64_kstat64 (buf, &kst64);
-#  endif
-# else
-  /* 32-bit kABI with default 64-bit time_t, e.g. arc, riscv32.  */
-  struct statx tmp;
-  int r = INLINE_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
-			       STATX_BASIC_STATS, &tmp);
+  r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &kst64, flag);
   if (r == 0)
-    __cp_stat64_statx (buf, &tmp);
-  return r;
+    r = __cp_stat64_kstat64 (buf, &kst64);
+#  endif
 # endif
 #else
 # ifdef __NR_fstatat64
-  /* All kABIs with non-LFS support, e.g. arm, csky, i386, hppa, m68k,
-     microblaze, nios2, sh, powerpc32, and sparc32.  */
-  return INLINE_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
+  /* All kABIs with non-LFS support and with old 32-bit time_t support
+     e.g. arm, csky, i386, hppa, m68k, microblaze, nios2, sh, powerpc32,
+     and sparc32.  */
+  struct stat64 st64;
+  r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
+  if (r == 0)
+    {
+      /* Clear both pad and reserved fields.  */
+      memset (buf, 0, sizeof (*buf));
+
+      buf->st_dev = st64.st_dev,
+      buf->st_ino = st64.st_ino;
+      buf->st_mode = st64.st_mode;
+      buf->st_nlink = st64.st_nlink;
+      buf->st_uid = st64.st_uid;
+      buf->st_gid = st64.st_gid;
+      buf->st_rdev = st64.st_rdev;
+      buf->st_size = st64.st_size;
+      buf->st_blksize = st64.st_blksize;
+      buf->st_blocks  = st64.st_blocks;
+      buf->st_atim = valid_timespec_to_timespec64 (st64.st_atim);
+      buf->st_mtim = valid_timespec_to_timespec64 (st64.st_mtim);
+      buf->st_ctim = valid_timespec_to_timespec64 (st64.st_ctim);
+    }
 # else
   /* 64-bit kabi outlier, e.g. mips64 and mips64-n32.  */
   struct kernel_stat kst;
-  int r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
-  return r ?: __cp_kstat_stat64 (&kst, buf);
+  r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
+  if (r == 0)
+    r =  __cp_kstat_stat64_t64 (&kst, buf);
 # endif
 #endif
+
+  return r;
 }
+#if __TIMESIZE != 64
+hidden_def (__fstatat64_time64)
+
+int
+__fstatat64 (int fd, const char *file, struct stat64 *buf, int flags)
+{
+  struct __stat64_t64 st_t64;
+  return __fstatat64_time64 (fd, file, &st_t64, flags)
+	 ?: __cp_stat64_t64_stat64 (&st_t64, buf);
+}
+#endif
+
+#undef __fstatat
+#undef fstatat
+
 hidden_def (__fstatat64)
 weak_alias (__fstatat64, fstatat64)
 
diff --git a/sysdeps/unix/sysv/linux/lstat64.c b/sysdeps/unix/sysv/linux/lstat64.c
index e5f02e9822..971ab8469d 100644
--- a/sysdeps/unix/sysv/linux/lstat64.c
+++ b/sysdeps/unix/sysv/linux/lstat64.c
@@ -19,19 +19,32 @@
 #define __lstat __redirect___lstat
 #define lstat   __redirect_lstat
 #include <sys/stat.h>
-#undef __lstat
-#undef lstat
 #include <fcntl.h>
 #include <kernel_stat.h>
+#include <stat_t64_cp.h>
+
+int
+__lstat64_time64 (const char *file, struct __stat64_t64 *buf)
+{
+  return __fstatat64_time64 (AT_FDCWD, file, buf, AT_SYMLINK_NOFOLLOW);
+}
+#if __TIMESIZE != 64
+hidden_def (__lstat64_time64)
 
 int
 __lstat64 (const char *file, struct stat64 *buf)
 {
-  return __fstatat64 (AT_FDCWD, file, buf, AT_SYMLINK_NOFOLLOW);
+  struct __stat64_t64 st_t64;
+  return __lstat64_time64 (file, &st_t64)
+	 ?: __cp_stat64_t64_stat64 (&st_t64, buf);
 }
+#endif
 hidden_def (__lstat64)
 weak_alias (__lstat64, lstat64)
 
+#undef __lstat
+#undef lstat
+
 #if XSTAT_IS_XSTAT64
 strong_alias (__lstat64, __lstat)
 weak_alias (__lstat64, lstat)
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/kstat_cp.h b/sysdeps/unix/sysv/linux/mips/mips64/kstat_cp.h
index 7f226416f9..1805d4b85f 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/kstat_cp.h
+++ b/sysdeps/unix/sysv/linux/mips/mips64/kstat_cp.h
@@ -22,11 +22,14 @@
 static inline int
 __cp_kstat_stat (const struct kernel_stat *kst, struct stat *st)
 {
+  if (! in_ino_t_range (kst->st_ino)
+      || ! in_off_t_range (kst->st_size)
+      || ! in_blkcnt_t_range (kst->st_blocks))
+    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
+
   st->st_dev = kst->st_dev;
   memset (&st->st_pad1, 0, sizeof (st->st_pad1));
   st->st_ino = kst->st_ino;
-  if (st->st_ino != kst->st_ino)
-    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
   st->st_mode = kst->st_mode;
   st->st_nlink = kst->st_nlink;
   st->st_uid = kst->st_uid;
@@ -34,8 +37,6 @@ __cp_kstat_stat (const struct kernel_stat *kst, struct stat *st)
   st->st_rdev = kst->st_rdev;
   memset (&st->st_pad2, 0, sizeof (st->st_pad2));
   st->st_size = kst->st_size;
-  if (st->st_size != kst->st_size)
-    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
   st->st_pad3 = 0;
   st->st_atim.tv_sec = kst->st_atime_sec;
   st->st_atim.tv_nsec = kst->st_atime_nsec;
@@ -45,26 +46,21 @@ __cp_kstat_stat (const struct kernel_stat *kst, struct stat *st)
   st->st_ctim.tv_nsec = kst->st_ctime_nsec;
   st->st_blksize = kst->st_blksize;
   st->st_blocks = kst->st_blocks;
-  if (st->st_blocks != kst->st_blocks)
-    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
   memset (&st->st_pad5, 0, sizeof (st->st_pad5));
 
   return 0;
 }
 
 static inline int
-__cp_kstat_stat64 (const struct kernel_stat *kst, struct stat64 *st)
+__cp_kstat_stat64_t64 (const struct kernel_stat *kst, struct __stat64_t64 *st)
 {
   st->st_dev = kst->st_dev;
-  memset (&st->st_pad1, 0, sizeof (st->st_pad1));
   st->st_ino = kst->st_ino;
   st->st_mode = kst->st_mode;
   st->st_nlink = kst->st_nlink;
   st->st_uid = kst->st_uid;
   st->st_gid = kst->st_gid;
   st->st_rdev = kst->st_rdev;
-  memset (&st->st_pad2, 0, sizeof (st->st_pad2));
-  st->st_pad3 = 0;
   st->st_size = kst->st_size;
   st->st_blksize = kst->st_blksize;
   st->st_blocks = kst->st_blocks;
@@ -74,7 +70,6 @@ __cp_kstat_stat64 (const struct kernel_stat *kst, struct stat64 *st)
   st->st_mtim.tv_nsec = kst->st_mtime_nsec;
   st->st_ctim.tv_sec = kst->st_ctime_sec;
   st->st_ctim.tv_nsec = kst->st_ctime_nsec;
-  memset (&st->st_pad4, 0, sizeof (st->st_pad4));
 
   return 0;
 }
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/statx_cp.c b/sysdeps/unix/sysv/linux/mips/mips64/statx_cp.c
deleted file mode 100644
index 260cda987e..0000000000
--- a/sysdeps/unix/sysv/linux/mips/mips64/statx_cp.c
+++ /dev/null
@@ -1,3 +0,0 @@
-/* Override the generic statx_cp.c which is only needed for new 32-bit arch
-   without stat64 family support.
- */
diff --git a/sysdeps/unix/sysv/linux/stat64.c b/sysdeps/unix/sysv/linux/stat64.c
index 2f40037c2c..bd8b17ac49 100644
--- a/sysdeps/unix/sysv/linux/stat64.c
+++ b/sysdeps/unix/sysv/linux/stat64.c
@@ -19,16 +19,30 @@
 #define __stat __redirect___stat
 #define stat   __redirect_stat
 #include <sys/stat.h>
-#undef __stat
-#undef stat
 #include <fcntl.h>
 #include <kernel_stat.h>
+#include <stat_t64_cp.h>
+
+int
+__stat64_time64 (const char *file, struct __stat64_t64 *buf)
+{
+  return __fstatat64_time64 (AT_FDCWD, file, buf, 0);
+}
+#if __TIMESIZE != 64
+hidden_def (__stat64_time64)
 
 int
 __stat64 (const char *file, struct stat64 *buf)
 {
-  return __fstatat64 (AT_FDCWD, file, buf, 0);
+  struct __stat64_t64 st_t64;
+  return __stat64_time64 (file, &st_t64)
+	 ?: __cp_stat64_t64_stat64 (&st_t64, buf);
 }
+#endif
+
+#undef __stat
+#undef stat
+
 hidden_def (__stat64)
 weak_alias (__stat64, stat64)
 
diff --git a/sysdeps/unix/sysv/linux/stat_t64_cp.c b/sysdeps/unix/sysv/linux/stat_t64_cp.c
new file mode 100644
index 0000000000..a7de35761f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/stat_t64_cp.c
@@ -0,0 +1,56 @@
+/* Struct stat/stat64 to stat/stat64 conversion for Linux.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stat_t64_cp.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+
+#if __TIMESIZE != 64
+int
+__cp_stat64_t64_stat64 (const struct __stat64_t64 *st64_t64,
+			struct stat64 *st64)
+{
+  if (! in_time_t_range (st64_t64->st_atim.tv_sec)
+      || ! in_time_t_range (st64_t64->st_mtim.tv_sec)
+      || ! in_time_t_range (st64_t64->st_ctim.tv_sec))
+    {
+      __set_errno (EOVERFLOW);
+      return -1;
+    }
+
+  /* Clear both pad and reserved fields.  */
+  memset (st64, 0, sizeof (*st64));
+
+  st64->st_dev = st64_t64->st_dev,
+  st64->st_ino = st64_t64->st_ino;
+  st64->st_mode = st64_t64->st_mode;
+  st64->st_nlink = st64_t64->st_nlink;
+  st64->st_uid = st64_t64->st_uid;
+  st64->st_gid = st64_t64->st_gid;
+  st64->st_rdev = st64_t64->st_rdev;
+  st64->st_size = st64_t64->st_size;
+  st64->st_blksize = st64_t64->st_blksize;
+  st64->st_blocks  = st64_t64->st_blocks;
+  st64->st_atim = valid_timespec64_to_timespec (st64_t64->st_atim);
+  st64->st_mtim = valid_timespec64_to_timespec (st64_t64->st_mtim);
+  st64->st_ctim = valid_timespec64_to_timespec (st64_t64->st_ctim);
+
+  return 0;
+}
+#endif
diff --git a/sysdeps/unix/sysv/linux/stat_t64_cp.h b/sysdeps/unix/sysv/linux/stat_t64_cp.h
new file mode 100644
index 0000000000..18a1b92f6d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/stat_t64_cp.h
@@ -0,0 +1,25 @@
+/* Copy to/from struct stat with and without 64-bit time_t support.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sys/stat.h>
+
+#if __TIMESIZE != 64
+extern int __cp_stat64_t64_stat64 (const struct __stat64_t64 *st64_t64,
+				   struct stat64 *st64)
+  attribute_hidden;
+#endif
diff --git a/sysdeps/unix/sysv/linux/statx_cp.c b/sysdeps/unix/sysv/linux/statx_cp.c
index cc6e17929e..8ed74feca5 100644
--- a/sysdeps/unix/sysv/linux/statx_cp.c
+++ b/sysdeps/unix/sysv/linux/statx_cp.c
@@ -47,3 +47,33 @@ __cp_stat64_statx (struct stat64 *to, struct statx *from)
   to->st_blksize = from->stx_blksize;
 }
 #endif
+
+#if (__WORDSIZE == 32 \
+     && (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32))
+void
+__cp_stat64_t64_statx (struct __stat64_t64 *to, const struct statx *from)
+{
+  /* Clear both pad and reserved fields.  */
+  memset (to, 0, sizeof (*to));
+
+  to->st_dev = ((from->stx_dev_minor & 0xff) | (from->stx_dev_major << 8)
+		| ((from->stx_dev_minor & ~0xff) << 12));
+  to->st_ino = from->stx_ino;
+  to->st_mode = from->stx_mode;
+  to->st_nlink = from->stx_nlink;
+  to->st_uid = from->stx_uid;
+  to->st_gid = from->stx_gid;
+  to->st_rdev = ((from->stx_rdev_minor & 0xff) | (from->stx_rdev_major << 8)
+		 | ((from->stx_rdev_minor & ~0xff) << 12));
+  to->st_size = from->stx_size;
+  to->st_blksize = from->stx_blksize;
+  to->st_blocks = from->stx_blocks;
+
+  to->st_atime = from->stx_atime.tv_sec;
+  to->st_atim.tv_nsec = from->stx_atime.tv_nsec;
+  to->st_mtime = from->stx_mtime.tv_sec;
+  to->st_mtim.tv_nsec = from->stx_mtime.tv_nsec;
+  to->st_ctime = from->stx_ctime.tv_sec;
+  to->st_ctim.tv_nsec = from->stx_ctime.tv_nsec;
+}
+#endif
diff --git a/sysdeps/unix/sysv/linux/statx_cp.h b/sysdeps/unix/sysv/linux/statx_cp.h
index fdbb807a31..42bfd322b4 100644
--- a/sysdeps/unix/sysv/linux/statx_cp.h
+++ b/sysdeps/unix/sysv/linux/statx_cp.h
@@ -18,3 +18,6 @@
 
 extern void __cp_stat64_statx (struct stat64 *to, struct statx *from)
   attribute_hidden;
+extern void __cp_stat64_t64_statx (struct __stat64_t64 *to,
+				   const struct statx *from)
+  attribute_hidden;
diff --git a/sysdeps/unix/sysv/linux/struct_stat_time64.h b/sysdeps/unix/sysv/linux/struct_stat_time64.h
new file mode 100644
index 0000000000..b85385b6f3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/struct_stat_time64.h
@@ -0,0 +1,85 @@
+/* Struct stat with 64-bit time support.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _BITS_STRUCT_STAT_TIME64_H
+#define _BITS_STRUCT_STAT_TIME64_H 1
+
+#if __TIMESIZE == 64
+# define __stat64_t64 stat64
+#else
+# ifdef __USE_LARGEFILE64
+#  include <endian.h>
+
+/* The definition should be equal to the 'struct __timespec64' internal
+   layout.  */
+#  if BYTE_ORDER == BIG_ENDIAN
+#   define __fieldts64(name) 					\
+     __time64_t name; __int32_t :32; __int32_t name ## nsec
+#  else
+#   define __fieldts64(name)					\
+     __time64_t name; __int32_t name ## nsec; __int32_t :32
+#  endif
+
+/* Workaround for the definition from struct_stat.h  */
+#  undef st_atime
+#  undef st_mtime
+#  undef st_ctime
+
+struct __stat64_t64
+  {
+    __dev_t st_dev;			/* Device.  */
+    __ino64_t st_ino;			/* file serial number.	*/
+    __mode_t st_mode;			/* File mode.  */
+    __nlink_t st_nlink;			/* Link count.  */
+    __uid_t st_uid;			/* User ID of the file's owner.	*/
+    __gid_t st_gid;			/* Group ID of the file's group.*/
+    __dev_t st_rdev;			/* Device number, if device.  */
+    __off64_t st_size;			/* Size of file, in bytes.  */
+    __blksize_t st_blksize;		/* Optimal block size for I/O.  */
+    __blkcnt64_t st_blocks;		/* Number 512-byte blocks allocated. */
+#   ifdef __USE_XOPEN2K8
+    /* Nanosecond resolution timestamps are stored in a format
+       equivalent to 'struct timespec'.  This is the type used
+       whenever possible but the Unix namespace rules do not allow the
+       identifier 'timespec' to appear in the <sys/stat.h> header.
+       Therefore we have to handle the use of this header in strictly
+       standard-compliant sources special.  */
+    struct __timespec64 st_atim;	/* Time of last access.  */
+    struct __timespec64 st_mtim;	/* Time of last modification.  */
+    struct __timespec64 st_ctim;	/* Time of last status change.  */
+#    define st_atime st_atim.tv_sec	/* Backward compatibility.  */
+#    define st_mtime st_mtim.tv_sec
+#    define st_ctime st_ctim.tv_sec
+#   else
+    __fieldts64 (st_atime);
+    __fieldts64 (st_mtime);
+    __fieldts64 (st_ctime);
+#   endif /* __USE_XOPEN2K8  */
+  };
+
+#   define _STATBUF_ST_BLKSIZE
+#   define _STATBUF_ST_RDEV
+#   define _STATBUF_ST_NSEC
+
+#   undef __fieldts64
+
+#  endif /* __USE_LARGEFILE64  */
+
+# endif /* __TIMESIZE == 64  */
+
+#endif /* _BITS_STRUCT_STAT_TIME64_H  */