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[Qemu-devel] [PATCH] fix bdrv_check_request for byte-granularity request
From: |
Christoph Hellwig |
Subject: |
[Qemu-devel] [PATCH] fix bdrv_check_request for byte-granularity requests |
Date: |
Sat, 14 Mar 2009 14:00:03 +0100 |
User-agent: |
Mutt/1.3.28i |
We never allow the offset to be byte-granularity for the sector-based
interface, instead the negative value for byte values applied to the
request length.
Signed-off-by: Christoph Hellwig <address@hidden>
Index: qemu/block.c
===================================================================
--- qemu.orig/block.c 2009-03-11 11:50:27.000000000 +0100
+++ qemu/block.c 2009-03-11 11:51:42.000000000 +0100
@@ -542,15 +542,15 @@ static int bdrv_check_byte_request(Block
static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
- int64_t offset;
+ size_t len;
/* Deal with byte accesses */
- if (sector_num < 0)
- offset = -sector_num;
+ if (nb_sectors < 0)
+ len = -nb_sectors;
else
- offset = sector_num * 512;
+ len = nb_sectors * 512;
- return bdrv_check_byte_request(bs, offset, nb_sectors * 512);
+ return bdrv_check_byte_request(bs, sector_num * 512, len);
}
/* return < 0 if error. See bdrv_write() for the return codes */
- [Qemu-devel] [PATCH] fix bdrv_check_request for byte-granularity requests,
Christoph Hellwig <=