[PATCH 0/7] rbd: isolate mapping info, rearrange init

[Alex Elder <elder@inktank.com>]

This third series begins a little more interesting code
restructuring.  The first five patches make more clear
the distinction in a struct rbd_device between information
about the underlying rbd image and information about the
mapped snapshot represented by the structure.

The last two patches (which might arguably belong in a
later sub-series) move some initialization code out of
one function and into its caller.

It is available as branch "wip-rbd-review-3" on the ceph-client git
repository, and is based on the branch "wip-rbd-review-2".

    https://github.com/ceph/ceph-client/tree/wip-rbd-review-3

					-Alex

[PATCH 1/7]  f4069bf rbd: separate mapping info in rbd_dev
    This groups some related fields of an rbd device structure into
    a sub-structure.  The fields pertain to the specific mapping
    an rbd_device represents--as opposed to the base rbd image.
[PATCH 2/7]  bee627f rbd: record mapped size
    This adds the size of the image or snapshot that's mapped to an
    rbd device's mapping information.
[PATCH 3/7]  8b45382 rbd: return snap name from rbd_add_parse_args()
[PATCH 4/7]  cb93cc4 rbd: set mapping name with the rest
    These two patches make the name of the mapped snapshot be set
    along with the other mapping-related fields.
[PATCH 5/7]  8a245ce rbd: simplify snap_by_name() interface
    This does some refactoring enabled by the previous few patches.
[PATCH 6/7]  e4008bd rbd: do some header initialization earlier
    This rearranges where certain initialization is done, beginning
    the process of re-ordering some of these steps in order to allow
    both format 1 and format 2 rbd images to be handled in the same way.
[PATCH 7/7]  275ba12 rbd: simplify rbd_init_disk() a bit
    This does some refactoring enabled by the previous patch.