diff options
| author | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2011-11-28 16:08:47 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-12-05 14:51:38 +0100 |
| commit | 53fec9d3fd3d3a4ded4b92dfa843436bf71380f1 (patch) | |
| tree | 7d819dc00ebd08495bcc3b6649e4bbd7d1536a39 /block_int.h | |
| parent | dbffbdcfff69431b622866ac5ea78df74fdc02d4 (diff) | |
block: add interface to toggle copy-on-read
The bdrv_enable_copy_on_read()/bdrv_disable_copy_on_read() functions can
be used to programmatically enable or disable copy-on-read for a block
device. Later patches add the actual copy-on-read logic.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block_int.h')
| -rw-r--r-- | block_int.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h index ea818e4e71..311bd2a6fa 100644 --- a/block_int.h +++ b/block_int.h @@ -198,6 +198,8 @@ struct BlockDriverState { int encrypted; /* if true, the media is encrypted */ int valid_key; /* if true, a valid encryption key has been set */ int sg; /* if true, the device is a /dev/sg* */ + int copy_on_read; /* if true, copy read backing sectors into image + note this is a reference count */ BlockDriver *drv; /* NULL means no media */ void *opaque; |