From 4c92b3ea6ef88da50517e4fde36f3bbc05aeb740 Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Thu, 4 Jan 1996 21:12:49 +0000
Subject: (_diskfs_rdwr_internal): Rewritten using pager_memcpy. Fix types of
 args: OFFSET to off_t, make AMT read/write size_t *.

---
 libdiskfs/rdwr-internal.c | 60 +++++++++--------------------------------------
 1 file changed, 11 insertions(+), 49 deletions(-)

(limited to 'libdiskfs/rdwr-internal.c')

diff --git a/libdiskfs/rdwr-internal.c b/libdiskfs/rdwr-internal.c
index ecd5d8c7..a458810f 100644
--- a/libdiskfs/rdwr-internal.c
+++ b/libdiskfs/rdwr-internal.c
@@ -1,5 +1,5 @@
-/* 
-   Copyright (C) 1994, 1995 Free Software Foundation
+/*
+   Copyright (C) 1994, 1995, 1996 Free Software Foundation
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
@@ -18,6 +18,7 @@
 #include "priv.h"
 #include <string.h>
 #include <fcntl.h>
+#include <hurd/pager.h>
 
 /* Actually read or write a file.  The file size must already permit
    the requested access.  NP is the file to read/write.  DATA is a buffer
@@ -27,18 +28,14 @@
    be locked.  If NOTIME is set, then don't update the mtime or atime. */
 error_t
 _diskfs_rdwr_internal (struct node *np,
-		       char *volatile data,
-		       volatile int offset, 
-		       volatile int amt, 
+		       char *data,
+		       off_t offset,
+		       size_t *amt,
 		       int dir,
 		       int notime)
 {
-  char *window;
-  int winoff;
-  volatile int cc;
   memory_object_t memobj;
-  volatile vm_prot_t prot 
-    = dir ? (VM_PROT_READ | VM_PROT_WRITE) : VM_PROT_READ;
+  vm_prot_t prot = dir ? (VM_PROT_READ | VM_PROT_WRITE) : VM_PROT_READ;
   error_t err = 0;
 
   if (dir)
@@ -51,46 +48,11 @@ _diskfs_rdwr_internal (struct node *np,
       else
 	np->dn_set_atime = 1;
     }
-  
-  memobj = diskfs_get_filemap (np, prot);
-  
-  while (amt > 0)
-    {
-      winoff = trunc_page (offset);
 
-      window = 0;
-      /* We map in 8 pages at a time.  Where'd that come from?  Well, the
-	 vax has a 1024 pagesize and with 8k blocks that seems like a
-	 reasonable number. */
-      err = vm_map (mach_task_self (), (u_int *)&window, 8 * __vm_page_size, 
-		    0, 1, memobj, winoff, 0, prot, prot, VM_INHERIT_NONE);
-      assert_perror (err);
-      diskfs_register_memory_fault_area (diskfs_get_filemap_pager_struct (np), 
-					 winoff, window, 8 * __vm_page_size);
-      
-      if ((offset - winoff) + amt > 8 * (off_t) __vm_page_size)
-	cc = 8 * __vm_page_size - (offset - winoff);
-      else
-	cc = amt;
-      
-      if (!(err = diskfs_catch_exception ()))
-	{
-	  if (dir)
-	    bcopy (data, window + (offset - winoff), cc);
-	  else
-	    bcopy (window + (offset - winoff), data, cc);
-	  diskfs_end_catch_exception ();
-	}
+  memobj = diskfs_get_filemap (np, prot);
 
-      vm_deallocate (mach_task_self (), (u_int) window, 8 * __vm_page_size);
-      diskfs_unregister_memory_fault_area (window, 8 * __vm_page_size);
-      if (err)
-	break;
-      amt -= cc;
-      offset += cc;
-      data += cc;
-    }
-  assert (amt == 0 || err);
+  err = pager_memcpy (diskfs_get_filemap_pager_struct (np), memobj,
+		      offset, data, amt, prot);
 
   if (!diskfs_readonly && !notime)
     {
@@ -99,7 +61,7 @@ _diskfs_rdwr_internal (struct node *np,
       else
 	np->dn_set_atime = 1;
     }
-  
+
   mach_port_deallocate (mach_task_self (), memobj);
   return err;
 }
-- 
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