Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table

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To: "Darrick J. Wong" <djwong@xxxxxxxxxx>
Subject: Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table
From: Miklos Szeredi <miklos@xxxxxxxxxx>
Date: Thu, 14 Aug 2025 21:19:15 +0200
Cc: John Groves <John@xxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Bernd Schubert <bschubert@xxxxxxx>, John Groves <jgroves@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Vishal Verma <vishal.l.verma@xxxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, Kent Overstreet <kent.overstreet@xxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, nvdimm@xxxxxxxxxxxxxxx, linux-cxl@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Amir Goldstein <amir73il@xxxxxxxxx>, Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>, Stefan Hajnoczi <shajnocz@xxxxxxxxxx>, Joanne Koong <joannelkoong@xxxxxxxxx>, Josef Bacik <josef@xxxxxxxxxxxxxx>, Aravind Ramesh <arramesh@xxxxxxxxxx>, Ajay Joshi <ajayjoshi@xxxxxxxxxx>
In-reply-to: <20250814185503.GZ7942@frogsfrogsfrogs>
References: <20250703185032.46568-1-john@groves.net> <20250703185032.46568-15-john@groves.net> <CAJfpegv19wFrT0QFkwFrKbc6KXmktt0Ba2Lq9fZoihA=eb8muA@mail.gmail.com> <20250814171941.GU7942@frogsfrogsfrogs> <CAJfpegv8Ta+w4CTb7gvYUTx3kka1-pxcWX_ik=17wteU9XBT1g@mail.gmail.com> <20250814185503.GZ7942@frogsfrogsfrogs>

On Thu, 14 Aug 2025 at 20:55, Darrick J. Wong <djwong@xxxxxxxxxx> wrote:

> Or do we move the backing_files_map out of CONFIG_FUSE_PASSTHROUGH and
> then let fuse-iomap/famfs extract the block/dax device from that?
> Then the backing_id/device cookie would be the same across a fuse mount.

Yes.

Thanks,
Miklos

References:
- [RFC V2 00/18] famfs: port into fuse
  - From: John Groves
- [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table
  - From: John Groves
- Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table
  - From: Miklos Szeredi
- Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table
  - From: Darrick J. Wong
- Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table
  - From: Miklos Szeredi
- Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table
  - From: Darrick J. Wong

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