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block: Add error parameter to blk_insert_bs()

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Now that blk_insert_bs() requests the BlockBackend permissions for the
node it attaches to, it can fail. Instead of aborting, pass the errors
to the callers.

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 2017-01-13 19:02:32 +01:00
parent 6d0eb64d5c
commit d7086422b1
14 changed files with 100 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

13
block/block-backend.c
View file

@ -508,19 +508,22 @@ void blk_remove_bs(BlockBackend *blk)
/*
* Associates a new BlockDriverState with @blk.
*/
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs)
int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp)
{
bdrv_ref(bs);
/* FIXME Error handling */
blk->root = bdrv_root_attach_child(bs, "root", &child_root,
blk->perm, blk->shared_perm, blk,
&error_abort);
blk->perm, blk->shared_perm, blk, errp);
if (blk->root == NULL) {
return -EPERM;
}
bdrv_ref(bs);
notifier_list_notify(&blk->insert_bs_notifiers, blk);
if (blk->public.throttle_state) {
throttle_timers_attach_aio_context(
&blk->public.throttle_timers, bdrv_get_aio_context(bs));
}
return 0;
}
/*