[Xen-changelog] [xen-unstable] xenpaging: make file_op largefile aware

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1327691017 0
# Node ID 255ae011567db6b96b083347158c28e30b656970
# Parent  cdb1e4a3845024c474141e6962ca0a8ace062d55
xenpaging: make file_op largefile aware

lseek() takes an off_t, the used "int << shiftsize" does not automatically
convert the int into a larger type. This leads to write errors with pagefiles
larger than 2G. Fix this by shifting an off_t instead of an int.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Committed-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---


diff -r cdb1e4a38450 -r 255ae011567d tools/xenpaging/file_ops.c
--- a/tools/xenpaging/file_ops.c        Fri Jan 27 18:32:55 2012 +0000
+++ b/tools/xenpaging/file_ops.c        Fri Jan 27 19:03:37 2012 +0000
@@ -26,12 +26,12 @@
 static int file_op(int fd, void *page, int i,
                    ssize_t (*fn)(int, void *, size_t))
 {
-    off_t seek_ret;
+    off_t offset = i;
     int total = 0;
     int bytes;
 
-    seek_ret = lseek(fd, i << PAGE_SHIFT, SEEK_SET);
-    if ( seek_ret == (off_t)-1 )
+    offset = lseek(fd, offset << PAGE_SHIFT, SEEK_SET);
+    if ( offset == (off_t)-1 )
         return -1;
 
     while ( total < PAGE_SIZE )

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