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block: Allow error return in BlockDevOps.change_media_cb()

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Some devices allow a media change between read-only and read-write
media. They need to adapt the permissions in their .change_media_cb()
implementation, which can fail. So add an Error parameter to the
function.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Kevin Wolf
2017-01-24 14:21:41 +01:00
parent c62d32f503
commit 39829a01ae
8 changed files with 36 additions and 15 deletions
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2
include/sysemu/block-backend.h
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@@ -34,7 +34,7 @@ typedef struct BlockDevOps {
* changes. Sure would be useful if it did.
* Device models with removable media must implement this callback.
*/
void (*change_media_cb)(void *opaque, bool load);
void (*change_media_cb)(void *opaque, bool load, Error **errp);
/*
* Runs when an eject request is issued from the monitor, the tray
* is closed, and the medium is locked.