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docs: qsd: Explain --export nbd,name=... default

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The 'name' option for NBD exports is optional. Add a note that the
default for the option is the node name (people could otherwise expect
that it's the empty string like for qemu-nbd).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210305094856.18964-1-kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2021-03-05 10:48:56 +01:00
parent a960c4b484
commit ef809f709d
1 changed files with 3 additions and 2 deletions
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docs/tools/qemu-storage-daemon.rst
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@ -80,8 +80,9 @@ Standard options:
requests for modifying data (the default is off).
The ``nbd`` export type requires ``--nbd-server`` (see below). ``name`` is
the NBD export name. ``bitmap`` is the name of a dirty bitmap reachable from
the block node, so the NBD client can use NBD_OPT_SET_META_CONTEXT with the
the NBD export name (if not specified, it defaults to the given
``node-name``). ``bitmap`` is the name of a dirty bitmap reachable from the
block node, so the NBD client can use NBD_OPT_SET_META_CONTEXT with the
metadata context name "qemu:dirty-bitmap:BITMAP" to inspect the bitmap.
The ``vhost-user-blk`` export type takes a vhost-user socket address on which