From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 4 Sep 2013 17:00:36 +0000 (+0200)
Subject: raw-posix: report unwritten extents as zero
X-Git-Tag: v1.7.0-rc0~131^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f5f7abcfd50bca38ae278a9c7a3ed60fba3d76dc;p=thirdparty%2Fqemu.git

raw-posix: report unwritten extents as zero

These are created for example with XFS_IOC_ZERO_RANGE.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---

diff --git a/block/raw-posix.c b/block/raw-posix.c
index d011cfdab67..1b41ea33569 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1128,6 +1128,9 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
     } else {
         data = f.fe.fe_logical;
         hole = f.fe.fe_logical + f.fe.fe_length;
+        if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) {
+            ret |= BDRV_BLOCK_ZERO;
+        }
     }
 
 #elif defined SEEK_HOLE && defined SEEK_DATA