From: Eric Blake <eblake@redhat.com>
To: Max Reitz <mreitz@redhat.com>, qemu-block@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
qemu-devel@nongnu.org, "Richard W.M. Jones" <rjones@redhat.com>
Subject: Re: [PATCH 02/18] fuse: Allow exporting BDSs via FUSE
Date: Fri, 20 Dec 2019 15:15:42 -0600 [thread overview]
Message-ID: <e4a0cb45-6de5-6ee9-94d2-598fc79a5aee@redhat.com> (raw)
In-Reply-To: <20191219143818.1646168-3-mreitz@redhat.com>
On 12/19/19 8:38 AM, Max Reitz wrote:
> fuse-export-add allows mounting block graph nodes via FUSE on some
> existing regular file. That file should then appears like a raw disk
> image, and accesses to it result in accesses to the exported BDS.
>
> Right now, we only set up the mount point and tear all mount points down
> in bdrv_close_all(). We do not implement any access functions, so
> accessing the mount point only results in errors. This will be
> addressed by a followup patch.
>
> The set of exported nodes is kept in a hash table so we can later add a
> fuse-export-remove that allows unmounting.
Before I review this, a quick question:
How does this compare to the recently added nbdfuse?
https://www.redhat.com/archives/libguestfs/2019-October/msg00080.html
Or put another way, maybe we get the same effect by combining qemu-nbd
with nbdfuse, but this new utility would cut out a middleman for more
efficiency, right?
> +++ b/block/fuse.c
> @@ -0,0 +1,260 @@
> +/*
> + * Present a block device as a raw image through FUSE
> + *
> + * Copyright (c) 2019 Max Reitz <mreitz@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
next prev parent reply other threads:[~2019-12-20 21:16 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-19 14:38 [PATCH 00/18] block: Allow exporting BDSs via FUSE Max Reitz
2019-12-19 14:38 ` [PATCH 01/18] configure: Detect libfuse Max Reitz
2019-12-19 14:38 ` [PATCH 02/18] fuse: Allow exporting BDSs via FUSE Max Reitz
2019-12-20 10:26 ` Kevin Wolf
2019-12-20 10:48 ` Max Reitz
2019-12-20 11:24 ` Kevin Wolf
2019-12-20 12:09 ` Max Reitz
2019-12-20 12:48 ` Markus Armbruster
2019-12-20 12:58 ` Kevin Wolf
2019-12-20 13:25 ` Markus Armbruster
2019-12-20 21:18 ` Eric Blake
2019-12-20 12:49 ` Markus Armbruster
2019-12-20 13:02 ` Kevin Wolf
2019-12-20 21:15 ` Eric Blake [this message]
2020-01-06 12:00 ` Max Reitz
2019-12-19 14:38 ` [PATCH 03/18] fuse: Implement standard FUSE operations Max Reitz
2019-12-19 14:38 ` [PATCH 04/18] fuse: Add fuse-export-remove Max Reitz
2019-12-19 14:38 ` [PATCH 05/18] fuse: Allow growable exports Max Reitz
2019-12-19 14:38 ` [PATCH 06/18] fuse: (Partially) implement fallocate() Max Reitz
2019-12-19 14:38 ` [PATCH 07/18] fuse: Implement hole detection through lseek Max Reitz
2019-12-19 14:38 ` [PATCH 08/18] iotests: Do not needlessly filter _make_test_img Max Reitz
2019-12-19 14:38 ` [PATCH 09/18] iotests: Do not pipe _make_test_img Max Reitz
2019-12-19 14:38 ` [PATCH 10/18] iotests: Use convert -n in some cases Max Reitz
2019-12-19 14:38 ` [PATCH 11/18] iotests: Avoid renaming images Max Reitz
2019-12-19 14:38 ` [PATCH 12/18] iotests: Derive image names from $TEST_IMG Max Reitz
2019-12-19 14:38 ` [PATCH 13/18] iotests/091: Use _cleanup_qemu instad of "wait" Max Reitz
2019-12-19 14:38 ` [PATCH 14/18] iotests: Restrict some Python tests to file Max Reitz
2019-12-19 14:38 ` [PATCH 15/18] iotests: Let _make_test_img guess $TEST_IMG_FILE Max Reitz
2019-12-19 14:38 ` [PATCH 16/18] iotests: Allow testing FUSE exports Max Reitz
2019-12-19 14:38 ` [PATCH 17/18] iotests: Enable fuse for many tests Max Reitz
2019-12-19 14:38 ` [PATCH 18/18] iotests/281: Add test for FUSE exports Max Reitz
2019-12-19 19:05 ` [PATCH 00/18] block: Allow exporting BDSs via FUSE Max Reitz
2019-12-20 10:08 ` Stefan Hajnoczi
2019-12-20 10:30 ` Max Reitz
2019-12-20 12:50 ` Kevin Wolf
2019-12-20 21:20 ` Eric Blake
2020-01-02 11:22 ` Stefan Hajnoczi
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