mgmt/glusterd: Refactor brick graph generation in volgen.

This commit does the following:

1. Adds several new functions for generation of brick xlator units
   in a volgen. Each such function takes care of generation of only
   one xlator in volgen.

2. A new table, server_graph_table, links all individual graph generation
   functions together.  The order of xlator function generators in the
   table determines the topology of the brick graph.

3. server_graph_builder() invokes individual graph generators by walking
   through server_graph_table. Addition of debug xlators into the brick
   graph is also handled by this walk. As a result, a lot of cruft that
   is present in the exisiting implementation of this function gets
   cleaned up.

4. get_server_xlator() now makes use of server_graph_table to determine
   whether a xlator key corresponds to a server xlator or not.

Change-Id: I46bb6e331544150302eb5b33c4007917aff2586d
BUG: 1188196
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/9751
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Krishnan Parthasarathi <kparthas@redhat.com>

0 files changed, 0 insertions, 0 deletions