From: Eric Sandeen <sandeen@redhat.com>
Date: Tue, 18 Aug 2009 03:48:51 +0000 (-0400)
Subject: ext4: reject too-large filesystems on 32-bit kernels
X-Git-Tag: v2.6.32-rc1~633^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf43d84b185e2ff54598f8c58a5a8e63148b6e90;p=pandora-kernel.git

ext4: reject too-large filesystems on 32-bit kernels

ext4 will happily mount a > 16T filesystem on a 32-bit box, but
this is not safe; writes to the block device will wrap past 16T
and the page cache can't index past 16T (232 index * 4k pages).

Adding another test to the existing "too many sectors" test
should do the trick.

Add a comment, a relevant return value, and fix the reference
to the CONFIG_LBD(AF) option as well.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

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