From: Vyacheslav Dubeyko <slava@dubeyko.com>
Date: Tue, 12 Nov 2013 23:11:09 +0000 (-0800)
Subject: hfsplus: implement attributes file creation functionality
X-Git-Tag: v3.13-rc1~106^2~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd;p=pandora-kernel.git

hfsplus: implement attributes file creation functionality

Implement functionality of creation AttributesFile metadata file on HFS+
volume in the case of absence of it.

It makes trying to open AttributesFile's B-tree during mount of HFS+
volume.  If HFS+ volume hasn't AttributesFile then a pointer on
AttributesFile's B-tree keeps as NULL.  Thereby, when it is discovered
absence of AttributesFile on HFS+ volume in the begin of xattr creation
operation then AttributesFile will be created.

The creation of AttributesFile will have success in the case of
availability (2 * clump) free blocks on HFS+ volume.  Otherwise,
creation operation is ended with error (-ENOSPC).

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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