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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Richard Weinberger <richard@nod.at>
Cc: vigneshr@ti.com, miklos@szeredi.hu,
	fuse-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
	boris.brezillon@collabora.com, linux-mtd@lists.infradead.org,
	rminnich@google.com, sven@narfation.org
Subject: Re: [PATCH 0/8] MUSE: Userspace backed MTD v3
Date: Thu, 28 Jan 2021 11:30:26 +0100	[thread overview]
Message-ID: <20210128113026.094b07b0@xps13> (raw)
In-Reply-To: <20210124232007.21639-1-richard@nod.at>

Hi Richard,

Richard Weinberger <richard@nod.at> wrote on Mon, 25 Jan 2021 00:19:59
+0100:

> I'm happy to announce the first non-RFC version of this patch set.
> Over the xmas holidays I found some time to experiment with various userspace
> implementations of MTDs and gave the kernel side more fine-tuning.
> 
> Rationale:
> ----------
> 
> When working with flash devices a common task is emulating them to run various
> tests or inspect dumps from real hardware. To achieve that we have plenty of
> emulators in the MTD subsystem: mtdram, block2mtd, nandsim.
> 
> Each of them implements an ad-hoc MTD and have various drawbacks.
> Over the last years some developers tried to extend them but these attempts
> often got rejected because they added just more adhoc feature instead of
> addressing overall problems.
> 
> MUSE is a novel approach to address the need of advanced MTD emulators.
> Advanced means in this context supporting different (vendor specific) image
> formats, different ways for fault injection (fuzzing) and recoding/replaying
> IOs to emulate power cuts.
> 
> The core goal of MUSE is having the complexity on the userspace side and
> only a small MTD driver in kernelspace.
> While playing with different approaches I realized that FUSE offers everything
> we need. So MUSE is a little like CUSE except that it does not implement a
> bare character device but an MTD.

I can't tell if your MUSE implementation is right but it looks fine
on the MTD side.

This is following the right path, I look forward to merging it soon!

Thanks for your contribution,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Richard Weinberger <richard@nod.at>
Cc: miklos@szeredi.hu, vigneshr@ti.com,
	boris.brezillon@collabora.com, rminnich@google.com,
	sven@narfation.org, linux-kernel@vger.kernel.org,
	linux-mtd@lists.infradead.org, fuse-devel@lists.sourceforge.net
Subject: Re: [PATCH 0/8] MUSE: Userspace backed MTD v3
Date: Thu, 28 Jan 2021 11:30:26 +0100	[thread overview]
Message-ID: <20210128113026.094b07b0@xps13> (raw)
In-Reply-To: <20210124232007.21639-1-richard@nod.at>

Hi Richard,

Richard Weinberger <richard@nod.at> wrote on Mon, 25 Jan 2021 00:19:59
+0100:

> I'm happy to announce the first non-RFC version of this patch set.
> Over the xmas holidays I found some time to experiment with various userspace
> implementations of MTDs and gave the kernel side more fine-tuning.
> 
> Rationale:
> ----------
> 
> When working with flash devices a common task is emulating them to run various
> tests or inspect dumps from real hardware. To achieve that we have plenty of
> emulators in the MTD subsystem: mtdram, block2mtd, nandsim.
> 
> Each of them implements an ad-hoc MTD and have various drawbacks.
> Over the last years some developers tried to extend them but these attempts
> often got rejected because they added just more adhoc feature instead of
> addressing overall problems.
> 
> MUSE is a novel approach to address the need of advanced MTD emulators.
> Advanced means in this context supporting different (vendor specific) image
> formats, different ways for fault injection (fuzzing) and recoding/replaying
> IOs to emulate power cuts.
> 
> The core goal of MUSE is having the complexity on the userspace side and
> only a small MTD driver in kernelspace.
> While playing with different approaches I realized that FUSE offers everything
> we need. So MUSE is a little like CUSE except that it does not implement a
> bare character device but an MTD.

I can't tell if your MUSE implementation is right but it looks fine
on the MTD side.

This is following the right path, I look forward to merging it soon!

Thanks for your contribution,
Miquèl

  parent reply	other threads:[~2021-01-28 10:31 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-24 23:19 [PATCH 0/8] MUSE: Userspace backed MTD v3 Richard Weinberger
2021-01-24 23:19 ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 1/8] fuse: Export fuse_simple_request Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 2/8] fuse: Export IO helpers Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 3/8] fuse: Make cuse_parse_one a common helper Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 4/8] mtd: Add MTD_MUSE flag Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 5/8] mtd: Allow passing a custom cmdline to cmdline line parser Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 6/8] fuse: Add MUSE specific defines FUSE interface Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 7/8] fuse: Implement MUSE - MTD in userspace Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-24 23:20 ` [PATCH 8/8] MAINTAINERS: Add entry for MUSE Richard Weinberger
2021-01-24 23:20   ` Richard Weinberger
2021-01-28 10:30 ` Miquel Raynal [this message]
2021-01-28 10:30   ` [PATCH 0/8] MUSE: Userspace backed MTD v3 Miquel Raynal
2021-02-01 13:14 ` Richard Weinberger
2021-02-01 13:14   ` Richard Weinberger
2021-02-01 13:55   ` Miklos Szeredi
2021-02-01 13:55     ` Miklos Szeredi
2021-02-09 14:26 ` Miklos Szeredi
2021-02-09 14:26   ` Miklos Szeredi
2021-02-09 14:35   ` Richard Weinberger
2021-02-09 14:35     ` Richard Weinberger
2021-02-09 15:10     ` [fuse-devel] " Luca Risolia
2021-02-09 15:10       ` Luca Risolia
2021-02-09 15:22       ` Miklos Szeredi
2021-02-09 15:22         ` Miklos Szeredi
2021-02-09 15:41       ` Richard Weinberger
2021-02-09 15:41         ` Richard Weinberger
2021-02-09 15:56         ` Luca Risolia
2021-02-09 15:56           ` Luca Risolia
2021-02-09 16:04           ` Richard Weinberger
2021-02-09 16:04             ` Richard Weinberger
2021-02-09 16:28             ` Luca Risolia
2021-02-09 16:28               ` Luca Risolia
2021-02-09 16:29               ` Richard Weinberger
2021-02-09 16:29                 ` Richard Weinberger
2021-02-09 16:42                 ` Luca Risolia
2021-02-09 16:42                   ` Luca Risolia
2021-02-09 16:50                   ` Richard Weinberger
2021-02-09 16:50                     ` Richard Weinberger
2021-02-09 17:46                     ` Luca Risolia
2021-02-09 17:46                       ` Luca Risolia
2021-02-09 19:42                       ` Miklos Szeredi
2021-02-09 19:42                         ` Miklos Szeredi
2021-02-09 20:06     ` Richard Weinberger
2021-02-09 20:06       ` Richard Weinberger
2021-02-10 10:12       ` Miklos Szeredi
2021-02-10 10:12         ` Miklos Szeredi
2021-02-10 11:12         ` Richard Weinberger
2021-02-10 11:12           ` Richard Weinberger
2021-02-10 11:16         ` Miklos Szeredi
2021-02-10 11:16           ` Miklos Szeredi
2021-02-11 18:09           ` Miklos Szeredi
2021-02-11 18:09             ` Miklos Szeredi
2021-04-13 12:59             ` Miklos Szeredi
2021-04-13 12:59               ` Miklos Szeredi
2021-02-09 21:39   ` Richard Weinberger
2021-02-09 21:39     ` Richard Weinberger
2021-02-10 10:16     ` Miklos Szeredi
2021-02-10 10:16       ` Miklos Szeredi
2021-02-10 11:00       ` Richard Weinberger
2021-02-10 11:00         ` Richard Weinberger
2021-02-10 11:14       ` Miquel Raynal
2021-02-10 11:14         ` Miquel Raynal
2021-02-10 11:23         ` Richard Weinberger
2021-02-10 11:23           ` Richard Weinberger
2021-02-10 20:55           ` Miquel Raynal
2021-02-10 20:55             ` Miquel Raynal
2021-02-10 21:11             ` Richard Weinberger
2021-02-10 21:11               ` Richard Weinberger

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