LWN: Comments on "File-level integrity"
https://lwn.net/Articles/752614/
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en-usMon, 17 Mar 2025 00:16:08 +0000Mon, 17 Mar 2025 00:16:08 +0000https://www.rssboard.org/rss-specificationlwn@lwn.netFile-system data hashes available from userspace
https://lwn.net/Articles/754777/
https://lwn.net/Articles/754777/StefanBr<div class="FormattedComment">
I would be very interested in ways to get a hash of file contents from userspace, *without* calculating the hash each time.<br>
<p>
Use cases:<br>
- synchronization/backups<br>
- caching of remote data<br>
- content indexing<br>
<p>
The current approaches are:<br>
- rely on the mtime<br>
- rehash<br>
<p>
Ideal would be a solution which stores a merkle tree (even with large blocks, e.g. 1 MByte per hash), using a well known cryptographic hash. The hash should be the same for all filesystems (probably configurable).<br>
</div>
Thu, 17 May 2018 14:57:31 +0000File-level integrity
https://lwn.net/Articles/754068/
https://lwn.net/Articles/754068/MoYahoo<div class="FormattedComment">
Is there any way to prevent offline attack for this?<br>
</div>
Thu, 10 May 2018 06:22:56 +0000Slides
https://lwn.net/Articles/753397/
https://lwn.net/Articles/753397/jamesmorris<div class="FormattedComment">
Thank you for the excellent writeup!<br>
<p>
</div>
Thu, 03 May 2018 03:12:32 +0000File-level integrity
https://lwn.net/Articles/753009/
https://lwn.net/Articles/753009/bfields<div class="FormattedComment">
Well, the design seems like a reasonable way to address the performance issue they're seeing, for reasons given in the article. You have to start somewhere, and I guess this project is still in early stages.<br>
<p>
But, you never know. And there may be some interesting parameters to tune here. I'll be curious to hear what they find out! <br>
</div>
Sat, 28 Apr 2018 14:57:43 +0000File-level integrity
https://lwn.net/Articles/753007/
https://lwn.net/Articles/753007/patrick_g<div class="FormattedComment">
<font class="QuotedText">>That sounds like a job for the integrity measurement architecture (IMA), which targets file-level integrity and is already in the kernel, but its performance is not really up to the Android use case, Ts'o said.</font><br>
<p>
<font class="QuotedText">>Bruce Fields asked about performance versus IMA, but Ts'o has not measured it.</font><br>
<p>
I'm having a hard time reconciling these two statements. Am I missing something?<br>
</div>
Sat, 28 Apr 2018 11:04:40 +0000Slides
https://lwn.net/Articles/752984/
https://lwn.net/Articles/752984/corbetIn general, LSFMM is not a slide-heavy event, so I wouldn't expect to see much become available.Fri, 27 Apr 2018 20:42:17 +0000File-level integrity
https://lwn.net/Articles/752981/
https://lwn.net/Articles/752981/andresfreund<div class="FormattedComment">
Ted didn't show slides (think he said he had exactly one, but there were connector issues). Was similar in a lot of other slots.<br>
</div>
Fri, 27 Apr 2018 20:05:34 +0000File-level integrity
https://lwn.net/Articles/752978/
https://lwn.net/Articles/752978/jamesmorris<div class="FormattedComment">
Are there slides available for LSF/MM? <br>
</div>
Fri, 27 Apr 2018 19:49:42 +0000pFad - Phonifier reborn
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