diff options
Diffstat (limited to 'docs/tools/qemu-storage-daemon.rst')
| -rw-r--r-- | docs/tools/qemu-storage-daemon.rst | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/docs/tools/qemu-storage-daemon.rst b/docs/tools/qemu-storage-daemon.rst index 8b97592663..fbeaf76954 100644 --- a/docs/tools/qemu-storage-daemon.rst +++ b/docs/tools/qemu-storage-daemon.rst @@ -77,6 +77,7 @@ Standard options: --export [type=]vhost-user-blk,id=<id>,node-name=<node-name>,addr.type=unix,addr.path=<socket-path>[,writable=on|off][,logical-block-size=<block-size>][,num-queues=<num-queues>] --export [type=]vhost-user-blk,id=<id>,node-name=<node-name>,addr.type=fd,addr.str=<fd>[,writable=on|off][,logical-block-size=<block-size>][,num-queues=<num-queues>] --export [type=]fuse,id=<id>,node-name=<node-name>,mountpoint=<file>[,growable=on|off][,writable=on|off][,allow-other=on|off|auto] + --export [type=]vduse-blk,id=<id>,node-name=<node-name>[,writable=on|off][,num-queues=<num-queues>][,queue-size=<queue-size>][,logical-block-size=<block-size>] is a block export definition. ``node-name`` is the block node that should be exported. ``writable`` determines whether or not the export allows write @@ -110,6 +111,26 @@ Standard options: ``allow-other`` to auto (the default) will try enabling this option, and on error fall back to disabling it. + The ``vduse-blk`` export type uses the ``id`` as the VDUSE device name. + ``num-queues`` sets the number of virtqueues (the default is 1). + ``queue-size`` sets the virtqueue descriptor table size (the default is 256). + + The instantiated VDUSE device must then be added to the vDPA bus using the + vdpa(8) command from the iproute2 project:: + + # vdpa dev add name <id> mgmtdev vduse + + The device can be removed from the vDPA bus later as follows:: + + # vdpa dev del <id> + + For more information about attaching vDPA devices to the host with + virtio_vdpa.ko or attaching them to guests with vhost_vdpa.ko, see + https://vdpa-dev.gitlab.io/. + + For more information about VDUSE, see + https://docs.kernel.org/userspace-api/vduse.html. + .. option:: --monitor MONITORDEF is a QMP monitor definition. See the :manpage:`qemu(1)` manual page for |