[PATCHv3 4/5] qemu: add docs for 'fmode' and 'dmode' options

Brian Turek brian.turek at gmail.com
Mon Oct 5 17:51:47 UTC 2020

Adds documentation for QEMU 9pfs 'fmode' and 'dmode' options.

Signed-off-by: Brian Turek <brian.turek at gmail.com>
 docs/formatdomain.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
index cc4f91d4ea..085f29ef8f 100644
--- a/docs/formatdomain.rst
+++ b/docs/formatdomain.rst
@@ -3062,6 +3062,12 @@ A directory on the host that can be accessed directly from the guest.
        <target dir='/import/from/host'/>
+     <filesystem type='mount' accessmode='mapped' fmode='644' dmode='755'>
+       <driver type='path'/>
+       <source dir='/export/to/guest'/>
+       <target dir='/import/from/host'/>
+       <readonly/>
+     </filesystem>
      <filesystem type='file' accessmode='passthrough'>
        <driver type='loop' format='raw'/>
        <source file='/export/to/guest.img'/>
@@ -3140,6 +3146,12 @@ A directory on the host that can be accessed directly from the guest.
    "virtio-non-transitional", or "virtio". See `Virtio transitional
    devices <#elementsVirtioTransitional>`__ for more details.
+   The filesystem element has optional attributes ``fmode`` and ``dmode``.
+   These two attributes control the creation mode for files and directories
+   when used with the ``mapped`` value for ``accessmode`` (:since:`since 6.9.0,
+   requires QEMU 2.10` ).  If not specified, QEMU creates files with mode
+   ``600`` and directories with mode ``700``.
    The filesystem element has an optional attribute ``multidevs`` which
    specifies how to deal with a filesystem export containing more than one
    device, in order to avoid file ID collisions on guest when using 9pfs (

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