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[Qemu-devel] [PATCH 2/2] Allow xen guests to plug disks of 1 TiB or more
From: |
Felipe Franciosi |
Subject: |
[Qemu-devel] [PATCH 2/2] Allow xen guests to plug disks of 1 TiB or more |
Date: |
Wed, 3 Apr 2013 15:01:12 +0100 |
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.
Signed-off-by: Felipe Franciosi <address@hidden>
---
hw/xen_disk.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 83329e2..6255075 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -797,8 +797,8 @@ static int blk_init(struct XenDevice *xendev)
xenstore_write_be_int(&blkdev->xendev, "feature-persistent", 1);
xenstore_write_be_int(&blkdev->xendev, "info", info);
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);
return 0;
out_error:
--
1.7.10.4