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80 lines
3.0 KiB
80 lines
3.0 KiB
From 99f27e14856c528f442b628e8f4a7881e6e63179 Mon Sep 17 00:00:00 2001
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From: Stefano Garzarella <sgarzare@redhat.com>
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Date: Tue, 30 May 2023 09:19:41 +0200
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Subject: [PATCH 4/5] qapi: add '@fdset' feature for
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BlockdevOptionsVirtioBlkVhostVdpa
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RH-Author: Stefano Garzarella <sgarzare@redhat.com>
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RH-MergeRequest: 169: block/blkio: support fd passing for virtio-blk-vhost-vdpa driver
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RH-Bugzilla: 2180076
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Commit: [2/2] abee2a542e41f9eaa17dd204b74778e232d1eb60 (sgarzarella/qemu-kvm-c-9-s)
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The virtio-blk-vhost-vdpa driver in libblkio 1.3.0 supports the fd
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passing through the new 'fd' property.
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Since now we are using qemu_open() on '@path' if the virtio-blk driver
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supports the fd passing, let's announce it.
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In this way, the management layer can pass the file descriptor of an
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already opened vhost-vdpa character device. This is useful especially
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when the device can only be accessed with certain privileges.
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Add the '@fdset' feature only when the virtio-blk-vhost-vdpa driver
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in libblkio supports it.
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Suggested-by: Markus Armbruster <armbru@redhat.com>
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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
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Message-id: 20230530071941.8954-3-sgarzare@redhat.com
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 98b126f5e3228a346c774e569e26689943b401dd)
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- changed doc indentantion since QAPI parser failed downstream because
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we don't have commit 08349786c84306863a3b659c8a9b28bb74c405c6
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downstream. It relaxed the indentation rules.
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Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
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---
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meson.build | 4 ++++
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qapi/block-core.json | 6 ++++++
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2 files changed, 10 insertions(+)
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diff --git a/meson.build b/meson.build
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index d964e741e7..a18cc64531 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -1843,6 +1843,10 @@ config_host_data.set('CONFIG_LZO', lzo.found())
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config_host_data.set('CONFIG_MPATH', mpathpersist.found())
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config_host_data.set('CONFIG_MPATH_NEW_API', mpathpersist_new_api)
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config_host_data.set('CONFIG_BLKIO', blkio.found())
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+if blkio.found()
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+ config_host_data.set('CONFIG_BLKIO_VHOST_VDPA_FD',
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+ blkio.version().version_compare('>=1.3.0'))
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+endif
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config_host_data.set('CONFIG_CURL', curl.found())
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config_host_data.set('CONFIG_CURSES', curses.found())
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config_host_data.set('CONFIG_GBM', gbm.found())
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diff --git a/qapi/block-core.json b/qapi/block-core.json
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index c05ad0c07e..81b48a8d3b 100644
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--- a/qapi/block-core.json
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+++ b/qapi/block-core.json
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@@ -3841,10 +3841,16 @@
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#
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# @path: path to the vhost-vdpa character device.
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#
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+# Features:
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+# @fdset: Member @path supports the special "/dev/fdset/N" path
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+# (since 8.1)
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+#
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# Since: 7.2
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##
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{ 'struct': 'BlockdevOptionsVirtioBlkVhostVdpa',
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'data': { 'path': 'str' },
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+ 'features': [ { 'name' :'fdset',
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+ 'if': 'CONFIG_BLKIO_VHOST_VDPA_FD' } ],
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'if': 'CONFIG_BLKIO' }
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##
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--
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2.39.3
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