tree 7065d40689b2a7048b3004ce512301f951725dbb
parent 33a610c398603efafd954c706ba07850835a5098
author Kevin Wolf <kwolf@redhat.com> 1481797652 +0100
committer Kevin Wolf <kwolf@redhat.com> 1488310836 +0100

block: Default .bdrv_child_perm() for filter drivers

Most filters need permissions related to read and write for their
children, but only if the node has a parent that wants to use the same
operation on the filter. The same is true for resize.

This adds a default implementation that simply forwards all necessary
permissions to all children of the node and leaves the other permissions
unchanged.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>