From b367e78bd1c7af4c018ce98b1f6d3e001aba895a Mon Sep 17 00:00:00 2001
From: Boaz Harrosh <bharrosh@panasas.com>
Date: Sun, 7 Feb 2010 19:18:58 +0200
Subject: [PATCH] exofs: Prepare for groups

* Rename _offset_dev_unit_off() to _calc_stripe_info()
  and recieve a struct for the output params

* In _prepare_for_striping we only need to call
  _calc_stripe_info() once. The other componets
  are easy to calculate from that. This code
  was inspired by what's done in truncate.

* Some code shifts that make sense now but will make
  more sense when group support is added.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
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