[Xen-changelog] [qemu-upstream-unstable] Allow xen guests to plug disks of 1 TiB or more

[patchbot@xxxxxxx]

commit e2155ddd22fe4378030cbbdbbb089a6fa2f3ad44
Author:     Felipe Franciosi <felipe.franciosi@xxxxxxxxxx>
AuthorDate: Fri Apr 5 15:47:59 2013 +0000
Commit:     Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
CommitDate: Fri Apr 5 23:31:53 2013 +0000

    Allow xen guests to plug disks of 1 TiB or more
    
    The current xen backend driver implementation uses int64_t variables
    to store the size of the corresponding backend disk/file. It also uses
    an int64_t variable to store the block size of that image. When writing
    the number of sectors (file_size/block_size) to xenstore, however, it
    passes these values as 32 bit signed integers. This will cause an
    overflow for any disk of 1 TiB or more.
    
    This patch changes the xen backend driver to use a 64 bit integer write
    xenstore function.
    
    upstream-commit-id: 9246ce881128df2a69178779c1ef33c83df3c70d
    
    Signed-off-by: Felipe Franciosi <felipe@xxxxxxxxxxxx>
    Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 hw/xen_disk.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 668cb54..f484404 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -826,8 +826,8 @@ static int blk_connect(struct XenDevice *xendev)
 
     /* Fill in number of sector size and number of sectors */
     xenstore_write_be_int(&blkdev->xendev, "sector-size", blkdev->file_blk);
-    xenstore_write_be_int(&blkdev->xendev, "sectors",
-                          blkdev->file_size / blkdev->file_blk);
+    xenstore_write_be_int64(&blkdev->xendev, "sectors",
+                            blkdev->file_size / blkdev->file_blk);
 
     if (xenstore_read_fe_int(&blkdev->xendev, "ring-ref", &blkdev->ring_ref) 
== -1) {
         return -1;
--
generated by git-patchbot for /home/xen/git/qemu-upstream-unstable.git

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