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SubjectRe: ext4 features
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Date
Ric Wheeler <ric@emc.com> writes:

> Having a checksum (or even a digital signature on a file) that lets us
> detect corruption is very useful since, in many cases, it allows us to
> flag the file as corrupt before it gets used.

We can't have that. Sector/block/etc. checksums - yes.

A checksum, signature, hash etc. of the whole file would require
actually reading the whole file. It can be done by tripwire or
backup, and even by fsck, but not by the filesystem in normal
operation.
--
Krzysztof Halasa
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