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block: Add blk_dev_has_tray() 

Pull out the check whether a block device has a tray from
blk_dev_is_tray_open() into its own function so both attributes (whether
there is a tray vs. whether that tray is open) can be queried
independently.

Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 1454096953-31773-2-git-send-email-mreitz@redhat.com
This commit is contained in:
Max Reitz 2016-01-29 20:49:10 +01:00
parent d2ea854c38
commit 8f3a73bc57
2 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
block/block-backend.c
View File

@ -458,6 +458,14 @@ bool blk_dev_has_removable_media(BlockBackend *blk)
return !blk->dev || (blk->dev_ops && blk->dev_ops->change_media_cb); return !blk->dev || (blk->dev_ops && blk->dev_ops->change_media_cb);
} }
/*
* Does @blk's attached device model have a tray?
*/
bool blk_dev_has_tray(BlockBackend *blk)
{
return blk->dev_ops && blk->dev_ops->is_tray_open;
}
/* /*
* Notify @blk's attached device model of a media eject request. * Notify @blk's attached device model of a media eject request.
* If @force is true, the medium is about to be yanked out forcefully. * If @force is true, the medium is about to be yanked out forcefully.
@ -474,7 +482,7 @@ void blk_dev_eject_request(BlockBackend *blk, bool force)
*/ */
bool blk_dev_is_tray_open(BlockBackend *blk) bool blk_dev_is_tray_open(BlockBackend *blk)
{ {
if (blk->dev_ops && blk->dev_ops->is_tray_open) { if (blk_dev_has_tray(blk)) {
return blk->dev_ops->is_tray_open(blk->dev_opaque); return blk->dev_ops->is_tray_open(blk->dev_opaque);
} }
return false; return false;

1
include/block/block_int.h
View File

@ -695,6 +695,7 @@ void blk_set_bs(BlockBackend *blk, BlockDriverState *bs);
void blk_dev_change_media_cb(BlockBackend *blk, bool load); void blk_dev_change_media_cb(BlockBackend *blk, bool load);
bool blk_dev_has_removable_media(BlockBackend *blk); bool blk_dev_has_removable_media(BlockBackend *blk);
bool blk_dev_has_tray(BlockBackend *blk);
void blk_dev_eject_request(BlockBackend *blk, bool force); void blk_dev_eject_request(BlockBackend *blk, bool force);
bool blk_dev_is_tray_open(BlockBackend *blk); bool blk_dev_is_tray_open(BlockBackend *blk);
bool blk_dev_is_medium_locked(BlockBackend *blk); bool blk_dev_is_medium_locked(BlockBackend *blk);