[06/10] linux: Consolidate fstatvfs implementations

  There is no need to handle ENOSYS on fstatfs64 call, required only
for alpha (where is already fallbacks to fstatfs).  The wordsize
internal_statvfs64.c is removed, since how the LFS support is
provided by fstatvfs64.c (used on 64-bit architectures as well).

Checked on x86_64-linux-gnu.
---
 sysdeps/unix/sysv/linux/alpha/fstatvfs.c      |  1 -
 sysdeps/unix/sysv/linux/alpha/fstatvfs64.c    |  1 -
 sysdeps/unix/sysv/linux/fstatvfs.c            |  9 ++--
 sysdeps/unix/sysv/linux/fstatvfs64.c          | 53 +++++++------------
 .../unix/sysv/linux/wordsize-64/fstatvfs.c    |  5 --
 .../unix/sysv/linux/wordsize-64/fstatvfs64.c  |  1 -
 .../linux/wordsize-64/internal_statvfs64.c    |  1 -
 7 files changed, 25 insertions(+), 46 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/alpha/fstatvfs.c
 delete mode 100644 sysdeps/unix/sysv/linux/alpha/fstatvfs64.c
 delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/fstatvfs.c
 delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/fstatvfs64.c
 delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/internal_statvfs64.c
  

On 2/8/21 4:49 PM, Adhemerval Zanella via Libc-alpha wrote:
> There is no need to handle ENOSYS on fstatfs64 call, required only
> for alpha (where is already fallbacks to fstatfs).  The wordsize
> internal_statvfs64.c is removed, since how the LFS support is
> provided by fstatvfs64.c (used on 64-bit architectures as well).

LGTM.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 
> Checked on x86_64-linux-gnu.
> ---
>  sysdeps/unix/sysv/linux/alpha/fstatvfs.c      |  1 -
>  sysdeps/unix/sysv/linux/alpha/fstatvfs64.c    |  1 -
>  sysdeps/unix/sysv/linux/fstatvfs.c            |  9 ++--
>  sysdeps/unix/sysv/linux/fstatvfs64.c          | 53 +++++++------------
>  .../unix/sysv/linux/wordsize-64/fstatvfs.c    |  5 --
>  .../unix/sysv/linux/wordsize-64/fstatvfs64.c  |  1 -
>  .../linux/wordsize-64/internal_statvfs64.c    |  1 -
>  7 files changed, 25 insertions(+), 46 deletions(-)
>  delete mode 100644 sysdeps/unix/sysv/linux/alpha/fstatvfs.c
>  delete mode 100644 sysdeps/unix/sysv/linux/alpha/fstatvfs64.c
>  delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/fstatvfs.c
>  delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/fstatvfs64.c
>  delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/internal_statvfs64.c
> 
> diff --git a/sysdeps/unix/sysv/linux/alpha/fstatvfs.c b/sysdeps/unix/sysv/linux/alpha/fstatvfs.c
> deleted file mode 100644
> index 92e772347b..0000000000
> --- a/sysdeps/unix/sysv/linux/alpha/fstatvfs.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -#include <sysdeps/unix/sysv/linux/fstatvfs.c>
> diff --git a/sysdeps/unix/sysv/linux/alpha/fstatvfs64.c b/sysdeps/unix/sysv/linux/alpha/fstatvfs64.c
> deleted file mode 100644
> index 0f1e71027a..0000000000
> --- a/sysdeps/unix/sysv/linux/alpha/fstatvfs64.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -#include <sysdeps/unix/sysv/linux/fstatvfs64.c>
> diff --git a/sysdeps/unix/sysv/linux/fstatvfs.c b/sysdeps/unix/sysv/linux/fstatvfs.c
> index 8b67951ab6..0f56a13ca9 100644
> --- a/sysdeps/unix/sysv/linux/fstatvfs.c
> +++ b/sysdeps/unix/sysv/linux/fstatvfs.c
> @@ -16,11 +16,13 @@
>     License along with the GNU C Library; if not, see
>     <https://www.gnu.org/licenses/>.  */
>  
> -#include <stddef.h>
> -#include <sys/stat.h>
> +#include <sys/statvfs.h>
>  #include <sys/statfs.h>
> -#include "internal_statvfs.h"
> +#include <internal_statvfs.h>
> +#include <time.h>
> +#include <kernel_stat.h>
>  
> +#if !STATFS_IS_STATFS64
>  int
>  __fstatvfs (int fd, struct statvfs *buf)
>  {
> @@ -38,3 +40,4 @@ __fstatvfs (int fd, struct statvfs *buf)
>  }
>  weak_alias (__fstatvfs, fstatvfs)
>  libc_hidden_weak (fstatvfs)
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/fstatvfs64.c b/sysdeps/unix/sysv/linux/fstatvfs64.c
> index 6d2dbc5285..b95745e8b8 100644
> --- a/sysdeps/unix/sysv/linux/fstatvfs64.c
> +++ b/sysdeps/unix/sysv/linux/fstatvfs64.c
> @@ -16,48 +16,33 @@
>     License along with the GNU C Library; if not, see
>     <https://www.gnu.org/licenses/>.  */
>  
> -#include <errno.h>
> -#include <string.h>
> -#include <sys/stat.h>
> +#define __fstatvfs __fstatvfs_disable
> +#define fstatvfs fstatvfs_disable
> +#include <sys/statvfs.h>
>  #include <sys/statfs.h>
> -#include "internal_statvfs.h"
> -#include <kernel-features.h>
> +#include <internal_statvfs.h>
> +#include <time.h>
> +#include <kernel_stat.h>
>  
>  /* Return information about the filesystem on which FD resides.  */
>  int
>  __fstatvfs64 (int fd, struct statvfs64 *buf)
>  {
>    struct statfs64 fsbuf;
> -  int res = __fstatfs64 (fd, &fsbuf);
> -
> -#ifndef __ASSUME_STATFS64
> -  if (res < 0 && errno == ENOSYS)
> -    {
> -      struct statvfs buf32;
> -
> -      res = fstatvfs (fd, &buf32);
> -      if (res == 0)
> -	{
> -	  buf->f_bsize = buf32.f_bsize;
> -	  buf->f_frsize = buf32.f_frsize;
> -	  buf->f_blocks = buf32.f_blocks;
> -	  buf->f_bfree = buf32.f_bfree;
> -	  buf->f_bavail = buf32.f_bavail;
> -	  buf->f_files = buf32.f_files;
> -	  buf->f_ffree = buf32.f_ffree;
> -	  buf->f_favail = buf32.f_favail;
> -	  buf->f_fsid = buf32.f_fsid;
> -	  buf->f_flag = buf32.f_flag;
> -	  buf->f_namemax = buf32.f_namemax;
> -	  memcpy (buf->__f_spare, buf32.__f_spare, sizeof (buf32.__f_spare));
> -	}
> -    }
> -#endif
> +  if (__fstatfs64 (fd, &fsbuf) < 0)
> +    return -1;
>  
> -  if (res == 0)
> -    /* Convert the result.  */
> -    __internal_statvfs64 (NULL, buf, &fsbuf, fd);
> +  /* Convert the result.  */
> +  __internal_statvfs64 (NULL, buf, &fsbuf, fd);
>  
> -  return res;
> +  return 0;
>  }
>  weak_alias (__fstatvfs64, fstatvfs64)
> +
> +#undef __fstatvfs
> +#undef fstatvfs
> +
> +#if STATFS_IS_STATFS64
> +weak_alias (__fstatvfs64, __fstatvfs)
> +weak_alias (__fstatvfs64, fstatvfs)
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fstatvfs.c b/sysdeps/unix/sysv/linux/wordsize-64/fstatvfs.c
> deleted file mode 100644
> index 5803b6f882..0000000000
> --- a/sysdeps/unix/sysv/linux/wordsize-64/fstatvfs.c
> +++ /dev/null
> @@ -1,5 +0,0 @@
> -#define __fstatvfs64(file, buf) __no_fstatvfs64(file, buf)
> -#define fstatvfs64(file, buf) no_fstatvfs64(file, buf)
> -#include "../fstatvfs.c"
> -strong_alias (__fstatvfs, __fstatvfs64)
> -weak_alias (__fstatvfs, fstatvfs64)
> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fstatvfs64.c b/sysdeps/unix/sysv/linux/wordsize-64/fstatvfs64.c
> deleted file mode 100644
> index 60f3dfec61..0000000000
> --- a/sysdeps/unix/sysv/linux/wordsize-64/fstatvfs64.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -/* fstatvfs64 is the same as fstatvfs. */
> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/internal_statvfs64.c b/sysdeps/unix/sysv/linux/wordsize-64/internal_statvfs64.c
> deleted file mode 100644
> index d2a3509c6d..0000000000
> --- a/sysdeps/unix/sysv/linux/wordsize-64/internal_statvfs64.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -/* Nothing.  */
>