linux: Consolidate internal_statvfs

Remove the internal_statvfs64.c and open code the implementation
on internal_statvfs.c.  The alpha is now unrequired, the generic
implementation also handles it.

Also, remove unused includes on internal_statvfs.c, and remove
unused arguments on __internal_statvfs{64}.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

sysdeps/unix/sysv/linux/Makefile

@@ -273,7 +273,7 @@ CFLAGS-ypclnt.c = -DUSE_BINDINGDIR=1
 endif
 
 ifeq ($(subdir),io)
-sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
+sysdep_routines += xstatconv internal_statvfs \
 		   sync_file_range fallocate fallocate64 \
 		   close_nocancel fcntl_nocancel \
 		   open_nocancel open64_nocancel \

sysdeps/unix/sysv/linux/alpha/internal_statvfs64.c

@@ -1 +0,0 @@
-#include <sysdeps/unix/sysv/linux/internal_statvfs64.c>

sysdeps/unix/sysv/linux/fstatvfs.c

@@ -33,7 +33,7 @@ __fstatvfs (int fd, struct statvfs *buf)
     return -1;
 
   /* Convert the result.  */
-  __internal_statvfs (NULL, buf, &fsbuf, fd);
+  __internal_statvfs (buf, &fsbuf);
 
   /* We signal success if the statfs call succeeded.  */
   return 0;

sysdeps/unix/sysv/linux/fstatvfs64.c

@@ -33,7 +33,7 @@ __fstatvfs64 (int fd, struct statvfs64 *buf)
     return -1;
 
   /* Convert the result.  */
-  __internal_statvfs64 (NULL, buf, &fsbuf, fd);
+  __internal_statvfs64 (buf, &fsbuf);
 
   return 0;
 }

sysdeps/unix/sysv/linux/internal_statvfs.c

@@ -16,37 +16,61 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <assert.h>
-#include <errno.h>
-#include <mntent.h>
-#include <paths.h>
-#include <stdbool.h>
-#include <stdio_ext.h>
-#include <string.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
 #include <sys/statfs.h>
-#include "internal_statvfs.h"
-#include "linux_fsinfo.h"
-#include <kernel-features.h>
-
+#include <sys/statvfs.h>
+#include <internal_statvfs.h>
+#include <string.h>
+#include <time.h>
+#include <kernel_stat.h>
 
 /* Special internal-only bit value.  */
-#define ST_VALID 0x0020
-
-
-#ifndef STATFS
-# define STATFS statfs
-# define STATVFS statvfs
-# define INTERNAL_STATVFS __internal_statvfs
-#else
-extern int __statvfs_getflags (const char *name, int fstype, int fd);
-#endif
-
+# define ST_VALID 0x0020
 
+#if !STATFS_IS_STATFS64
 void
-INTERNAL_STATVFS (const char *name, struct STATVFS *buf,
-		  struct STATFS *fsbuf, int fd)
+__internal_statvfs (struct statvfs *buf, const struct statfs *fsbuf)
+{
+  /* Now fill in the fields we have information for.  */
+  buf->f_bsize = fsbuf->f_bsize;
+  /* Linux has the f_frsize size only in later version of the kernel.
+     If the value is not filled in use f_bsize.  */
+  buf->f_frsize = fsbuf->f_frsize ?: fsbuf->f_bsize;
+  buf->f_blocks = fsbuf->f_blocks;
+  buf->f_bfree = fsbuf->f_bfree;
+  buf->f_bavail = fsbuf->f_bavail;
+  buf->f_files = fsbuf->f_files;
+  buf->f_ffree = fsbuf->f_ffree;
+  if (sizeof (buf->f_fsid) == sizeof (fsbuf->f_fsid))
+    /* The shifting uses 'unsigned long long int' even though the target
+       field might only have 32 bits.  This is OK since the 'if' branch
+       is not used in this case but the compiler would still generate
+       warnings.  */
+    buf->f_fsid = ((fsbuf->f_fsid.__val[0]
+		    & ((1ULL << (8 * sizeof (fsbuf->f_fsid.__val[0]))) - 1))
+		   | ((unsigned long long int) fsbuf->f_fsid.__val[1]
+		      << (8 * (sizeof (buf->f_fsid)
+			       - sizeof (fsbuf->f_fsid.__val[0])))));
+  else
+    /* We cannot help here.  The statvfs element is not large enough to
+       contain both words of the statfs f_fsid field.  */
+    buf->f_fsid = fsbuf->f_fsid.__val[0];
+#ifdef _STATVFSBUF_F_UNUSED
+  buf->__f_unused = 0;
+#endif
+  buf->f_namemax = fsbuf->f_namelen;
+  memset (buf->__f_spare, '\0', sizeof (buf->__f_spare));
+
+  /* What remains to do is to fill the fields f_favail and f_flag.  */
+
+  /* XXX I have no idea how to compute f_favail.  Any idea???  */
+  buf->f_favail = buf->f_ffree;
+
+  buf->f_flag = fsbuf->f_flags ^ ST_VALID;
+}
+#endif
+
+void
+__internal_statvfs64 (struct statvfs64 *buf, const struct statfs64 *fsbuf)
 {
   /* Now fill in the fields we have information for.  */
   buf->f_bsize = fsbuf->f_bsize;

sysdeps/unix/sysv/linux/internal_statvfs.h

@@ -18,9 +18,9 @@
 
 #include <sys/statvfs.h>
 
-extern void __internal_statvfs (const char *name, struct statvfs *buf,
-				struct statfs *fsbuf, int fd)
+extern void __internal_statvfs (struct statvfs *buf,
+				const struct statfs *fsbuf)
       attribute_hidden;
-extern void __internal_statvfs64 (const char *name, struct statvfs64 *buf,
-				  struct statfs64 *fsbuf, int fd)
+extern void __internal_statvfs64 (struct statvfs64 *buf,
+				  const struct statfs64 *fsbuf)
       attribute_hidden;

sysdeps/unix/sysv/linux/internal_statvfs64.c

@@ -1,4 +0,0 @@
-#define STATFS statfs64
-#define STATVFS statvfs64
-#define INTERNAL_STATVFS __internal_statvfs64
-#include "internal_statvfs.c"

sysdeps/unix/sysv/linux/statvfs.c

@@ -33,7 +33,7 @@ __statvfs (const char *file, struct statvfs *buf)
     return -1;
 
   /* Convert the result.  */
-  __internal_statvfs (file, buf, &fsbuf, -1);
+  __internal_statvfs (buf, &fsbuf);
 
   /* We signal success if the statfs call succeeded.  */
   return 0;

sysdeps/unix/sysv/linux/statvfs64.c

@@ -33,7 +33,7 @@ __statvfs64 (const char *file, struct statvfs64 *buf)
     return -1;
 
   /* Convert the result.  */
-  __internal_statvfs64 (file, buf, &fsbuf, -1);
+  __internal_statvfs64 (buf, &fsbuf);
 
   return 0;
 }