From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Wed, 4 May 2011 16:23:57 +0000 (+0900)
Subject: nilfs2: add ioctl which limits range of segment to be allocated
X-Git-Tag: v3.0-rc1~355^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=619205da5b567504310daf829dede1187fa29bbc;p=pandora-kernel.git

nilfs2: add ioctl which limits range of segment to be allocated

This adds a new ioctl command which limits range of segment to be
allocated.  This is intended to gather data whithin a range of the
partition before shrinking the filesystem, or to control new log
location for some purpose.

If a range is specified by the ioctl, segment allocator of nilfs tries
to allocate new segments from the range unless no free segments are
available there.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
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