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block: Inline bdrv_detach_child()

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The only caller is bdrv_root_unref_child(), let's just do the logic
directly in it. It simplifies further conversion of
bdrv_root_unref_child() to transaction actions.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@openvz.org>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20221107163558.618889-2-vsementsov@yandex-team.ru>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2022-11-07 19:35:55 +03:00 committed by Kevin Wolf
parent 48804eebd4
commit 00eb93b588
1 changed files with 19 additions and 27 deletions
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46
block.c
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@ -3070,30 +3070,6 @@ static BdrvChild *bdrv_attach_child_noperm(BlockDriverState *parent_bs,
tran, errp); tran, errp);
} }
static void bdrv_detach_child(BdrvChild *child)
{
BlockDriverState *old_bs = child->bs;
GLOBAL_STATE_CODE();
bdrv_replace_child_noperm(child, NULL);
bdrv_child_free(child);
if (old_bs) {
/*
* Update permissions for old node. We're just taking a parent away, so
* we're loosening restrictions. Errors of permission update are not
* fatal in this case, ignore them.
*/
bdrv_refresh_perms(old_bs, NULL);
/*
* When the parent requiring a non-default AioContext is removed, the
* node moves back to the main AioContext
*/
bdrv_try_change_aio_context(old_bs, qemu_get_aio_context(), NULL, NULL);
}
}
/* /*
* This function steals the reference to child_bs from the caller. * This function steals the reference to child_bs from the caller.
* That reference is later dropped by bdrv_root_unref_child(). * That reference is later dropped by bdrv_root_unref_child().
@ -3182,12 +3158,28 @@ out:
/* Callers must ensure that child->frozen is false. */ /* Callers must ensure that child->frozen is false. */
void bdrv_root_unref_child(BdrvChild *child) void bdrv_root_unref_child(BdrvChild *child)
{ {
BlockDriverState *child_bs; BlockDriverState *child_bs = child->bs;
GLOBAL_STATE_CODE(); GLOBAL_STATE_CODE();
bdrv_replace_child_noperm(child, NULL);
bdrv_child_free(child);
if (child_bs) {
/*
* Update permissions for old node. We're just taking a parent away, so
* we're loosening restrictions. Errors of permission update are not
* fatal in this case, ignore them.
*/
bdrv_refresh_perms(child_bs, NULL);
/*
* When the parent requiring a non-default AioContext is removed, the
* node moves back to the main AioContext
*/
bdrv_try_change_aio_context(child_bs, qemu_get_aio_context(), NULL,
NULL);
}
child_bs = child->bs;
bdrv_detach_child(child);
bdrv_unref(child_bs); bdrv_unref(child_bs);
} }