From: Miklos Szeredi <mszeredi@suse.cz>
Date: Thu, 18 Oct 2007 10:07:00 +0000 (-0700)
Subject: VFS: allow filesystems to implement atomic open+truncate
X-Git-Tag: v2.6.24-rc1~317
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d139d7ffd0c1e81e2a809909b4f8b121a0dc119a;p=pandora-kernel.git

VFS: allow filesystems to implement atomic open+truncate

Add a new attribute flag ATTR_OPEN, with the meaning: "truncation was
initiated by open() due to the O_TRUNC flag".

This way filesystems wanting to implement truncation within their ->open()
method can ignore such truncate requests.

This is a quick & dirty hack, but it comes for free.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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