diff options
| author | Markus Armbruster <armbru@redhat.com> | 2014-10-07 13:59:08 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2014-10-20 13:41:26 +0200 |
| commit | 9ba10c95a4a63ef453893ba16bf1c8e11a1d3c39 (patch) | |
| tree | effe1e5953818f0965be290de0748b5516e7015a /block/block-backend.c | |
| parent | 8fb3c76c949f34f29c5252ee339fbe1cbfcc3234 (diff) | |
| download | qemu-9ba10c95a4a63ef453893ba16bf1c8e11a1d3c39.tar.gz | |
block: Make BlockBackend own its BlockDriverState
On BlockBackend destruction, unref its BlockDriverState. Replaces the
callers' unrefs.
This turns the pointer from BlockBackend to BlockDriverState into a
strong reference, managed with bdrv_ref() / bdrv_unref(). The
back-pointer remains weak.
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 'block/block-backend.c')
| -rw-r--r-- | block/block-backend.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index d4bdd48e03..6236b5b96d 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -54,8 +54,6 @@ BlockBackend *blk_new(const char *name, Error **errp) /* * Create a new BlockBackend with a new BlockDriverState attached. - * Both have a reference count of one. Caller owns *both* references. - * TODO Let caller own only the BlockBackend reference * Otherwise just like blk_new(), which see. */ BlockBackend *blk_new_with_bs(const char *name, Error **errp) @@ -83,7 +81,9 @@ static void blk_delete(BlockBackend *blk) { assert(!blk->refcnt); if (blk->bs) { + assert(blk->bs->blk == blk); blk->bs->blk = NULL; + bdrv_unref(blk->bs); blk->bs = NULL; } /* Avoid double-remove after blk_hide_on_behalf_of_do_drive_del() */ @@ -119,8 +119,6 @@ void blk_ref(BlockBackend *blk) * Decrement @blk's reference count. * If this drops it to zero, destroy @blk. * For convenience, do nothing if @blk is null. - * Does *not* touch the attached BlockDriverState's reference count. - * TODO Decrement it! */ void blk_unref(BlockBackend *blk) { |