GitHub user jbmchuck opened a pull request:

    [LIBCLOUD-852] Support filtering in ec2 list_volumes

    ## Support filtering in EC2 list_volumes
    ### Description
    There currently is not a way to filter volumes in the EC2 driver 
list_volumes.  This is a useful feature for identifying volumes with certain 
attributes - e.g. orphaned volumes.  The filtering param is already implicitly 
used in list_volumes to specify an attached instance-id, if node arg is 
provided.  This change allows additional explicit filters to be provided.
    The particular issue I have run into motivating this change is - if I 
create a volume using create_volume and immediately attach it to a node using 
attach_volume I occasionally run into errors where the volume was created but 
is not yet ready for attachment.  I can use list_volumes to fetch everything 
and filter on my end, but I'd rather filter server side as I am with 
list_images and other similar functions.
    I also added a docstring. 
    ### Status
    done, ready for review
    ### Checklist (tick everything that applies)
    - [x] [Code 
 (required, can be done after the PR checks)
    - [x] Documentation
    - [ ] [Tests](
    - [ ] 
 (required for bigger changes)

You can merge this pull request into a Git repository by running:

    $ git pull 

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #859
commit cc33fc23fdd271b83567e3149c698ea6a9c4e612
Author: Michaelchuck, Jon (DS) <>
Date:   2016-09-16T19:48:17Z

    [LIBCLOUD-852] Support filtering in ec2 list_volumes


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