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

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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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Eric Sandeen 2009-08-17 23:48:51 -04:00 • committed by Theodore Ts'o

parent 0ccff1a49d

commit bf43d84b18

1 changed files with 10 additions and 3 deletions

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fs/ext4/super.c

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