diff options
author | Markus Armbruster <armbru@redhat.com> | 2014-10-07 13:59:25 +0200 |
---|---|---|
committer | Kevin Wolf <kwolf@redhat.com> | 2014-10-20 14:03:50 +0200 |
commit | a7f53e26a6f5bd64cda617cbcca118601d9a01d9 (patch) | |
tree | 126055939716b056e9cf975eae1118fdbe2526ee /include/sysemu | |
parent | 6007cdd448b6729e82530e85579e5089ddc58eba (diff) |
block: Lift device model API into BlockBackend
Move device model attachment / detachment and the BlockDevOps device
model callbacks and their wrappers from BlockDriverState to
BlockBackend.
Wrapper calls in block.c change from
bdrv_dev_FOO_cb(bs, ...)
to
if (bs->blk) {
bdrv_dev_FOO_cb(bs->blk, ...);
}
No change, because both bdrv_dev_change_media_cb() and
bdrv_dev_resize_cb() do nothing when no device model is attached, and
a device model can be attached only when bs->blk.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include/sysemu')
-rw-r--r-- | include/sysemu/block-backend.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index f63817a7cc..52d13c1c0e 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -25,6 +25,41 @@ */ #include "block/block.h" +/* Callbacks for block device models */ +typedef struct BlockDevOps { + /* + * Runs when virtual media changed (monitor commands eject, change) + * Argument load is true on load and false on eject. + * Beware: doesn't run when a host device's physical media + * 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); + /* + * Runs when an eject request is issued from the monitor, the tray + * is closed, and the medium is locked. + * Device models that do not implement is_medium_locked will not need + * this callback. Device models that can lock the medium or tray might + * want to implement the callback and unlock the tray when "force" is + * true, even if they do not support eject requests. + */ + void (*eject_request_cb)(void *opaque, bool force); + /* + * Is the virtual tray open? + * Device models implement this only when the device has a tray. + */ + bool (*is_tray_open)(void *opaque); + /* + * Is the virtual medium locked into the device? + * Device models implement this only when device has such a lock. + */ + bool (*is_medium_locked)(void *opaque); + /* + * Runs when the size changed (e.g. monitor command block_resize) + */ + void (*resize_cb)(void *opaque); +} BlockDevOps; + BlockBackend *blk_new(const char *name, Error **errp); BlockBackend *blk_new_with_bs(const char *name, Error **errp); void blk_ref(BlockBackend *blk); |