From: Theodore Ts'o <tytso@mit.edu>
Date: Sat, 3 Sep 2011 22:22:38 +0000 (-0400)
Subject: ext4: improve handling of conflicting mount options
X-Git-Tag: v3.2-rc1~85^2~88
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=56889787cfa77dfd96f0b3a3e6a4f26c2e4a5134;p=pandora-kernel.git

ext4: improve handling of conflicting mount options

If the user explicitly specifies conflicting mount options for
delalloc or dioread_nolock and data=journal, fail the mount, instead
of printing a warning and continuing (since many user's won't look at
dmesg and notice the warning).

Also, print a single warning that data=journal implies that delayed
allocation is not on by default (since it's not supported), and
furthermore that O_DIRECT is not supported.  Improve the text in
Documentation/filesystems/ext4.txt so this is clear there as well.

Similarly, if the dioread_nolock mount option is specified when the
file system block size != PAGE_SIZE, fail the mount instead of
printing a warning message and ignoring the mount option.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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