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authorMax Reitz <mreitz@redhat.com>2015-02-05 13:58:11 -0500
committerStefan Hajnoczi <stefanha@redhat.com>2015-02-16 15:07:18 +0000
commitca49a4fdb39d7b00b20e8500cba11aedc87755bd (patch)
treed609f7482ef9a1f6eda662e8be810250e140a898 /block/sheepdog.c
parent1ef01253eb90d0c69129c817e85fa92f9d45602a (diff)
block: Add blk_new_open()
blk_new_with_bs() creates a BlockBackend with an empty BlockDriverState attached to it. Empty BDSs are not nice, therefore add an alternative function which combines blk_new_with_bs() with bdrv_open(). Note: In contrast to bdrv_open() which takes a BlockDriver parameter, blk_new_open() does not take such a parameter. This is because bdrv_open() opens a BlockDriverState, therefore it is natural to be able to set the BlockDriver for that BDS. The fact that bdrv_open() can open more than a single BDS is merely some form of a byproduct. blk_new_open() on the other hand is intended to be used to create a whole tree of BlockDriverStates. Therefore, setting a single BlockDriver does not make much sense. Instead, the drivers to be used for each of the nodes must be configured through the "options" QDict; including the driver of the root BDS. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1423162705-32065-3-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/sheepdog.c')
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