lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 26 Feb 2020 05:05:03 -0800
From:   Matthew Wilcox <>
To:     Ritesh Harjani <>
Subject: Re: [PATCHv3 6/6] Documentation: Correct the description of

On Wed, Feb 26, 2020 at 03:27:08PM +0530, Ritesh Harjani wrote:
> Currently FIEMAP_EXTENT_LAST is not working consistently across
> different filesystem's fiemap implementations and thus this feature
> may be broken. So fix the documentation about this flag to meet the
> right expectations.

Are you saying filesystems have both false positives and false negatives?
I can understand how a filesystem might fail to set FIEMAP_EXTENT_LAST,
but not how a filesystem might set it when there's actually another
extent beyond this one.

> -This is the last extent in the file. A mapping attempt past this
> -extent will return nothing.
> +This is generally the last extent in the file. A mapping attempt past this
> +extent may return nothing. But the user must still confirm by trying to map
> +past this extent, since different filesystems implement this differently.

Powered by blists - more mailing lists