linux-kernel - Re: [PATCH] staging: exfat: add exfat filesystem code to staging

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Date:   Thu, 29 Aug 2019 14:14:35 +0200
From:   Pali Rohár <pali.rohar@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Valdis Klētnieks <valdis.kletnieks@...edu>,
        Sasha Levin <alexander.levin@...rosoft.com>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] staging: exfat: add exfat filesystem code to staging

On Wednesday 28 August 2019 18:08:17 Greg Kroah-Hartman wrote:
> The full specification of the filesystem can be found at:
>   https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification

This is not truth. This specification is not "full". There are missing
important details, like how is TexFAT implemented. In that specification
is just reference to other unpublished documents. So it is classic MS
way, they release something incomplete and incompatible with their own
NT implementation, like with FAT32 vs fastfat.sys.

I would be very very careful about existence of such documentation until
somebody implement it and do some testing against MS own implementation.

-- 
Pali Rohár
pali.rohar@...il.com