rbd: look up snapshot name in names buffer
authorAlex Elder <elder@inktank.com>
Tue, 30 Apr 2013 05:44:33 +0000 (00:44 -0500)
committerSage Weil <sage@inktank.com>
Thu, 2 May 2013 04:20:18 +0000 (21:20 -0700)
commit9682fc6d3a8b63f58fbfc5084f32c038170cfd6b
treec576e1c355153e7537011867ed043d83fccdaed5
parentdedc81ea8468fd29bdd13eb5a362cab96b53d802
rbd: look up snapshot name in names buffer

Rather than scanning the list of snapshot structures for it, scan
the snapshot context buffer containing snapshot names in order to
determine for a format 1 image the name associated with a given
snapshot id.

Pull out the part of rbd_dev_v1_snap_info() that does this scan into
a new function, _rbd_dev_v1_snap_name().  Have that function return
a dynamically-allocated copy of the name, and don't duplicate it in
rbd_dev_v1_snap_info().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
drivers/block/rbd.c