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authorDaniel P. Berrange <berrange@redhat.com>2016-03-21 14:11:42 +0000
committerKevin Wolf <kwolf@redhat.com>2016-03-30 11:59:32 +0200
commitabb06c5ac1c86e747bbe08bf7b5b69723ad69832 (patch)
tree227d67569c4069dbb356410cbf77e0544224bda8 /target-tricore
parent543021569978c908fccff235bf90fc803e6fed1d (diff)
block: add flag to indicate that no I/O will be performed
When opening an image it is useful to know whether the caller intends to perform I/O on the image or not. In the case of encrypted images this will allow the block driver to avoid having to prompt for decryption keys when we merely want to query header metadata about the image. eg qemu-img info This flag is enforced at the top level only, since even if we don't want todo I/O on the 'qcow2' file payload, the underlying 'file' driver will still need todo I/O to read the qcow2 header, for example. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'target-tricore')
0 files changed, 0 insertions, 0 deletions