[PATCH v2 2/3] docs: add qemu-storage-daemon(1) man page

[Stefan Hajnoczi <stefanha@redhat.com>]

Document the qemu-storage-daemon tool. Most of the command-line options
are identical to their QEMU counterparts. Perhaps Sphinx hxtool
integration could be extended to extract documentation for individual
command-line options so they can be shared. For now the
qemu-storage-daemon simply refers to the qemu(1) man page where the
command-line options are identical.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 docs/tools/conf.py                 |   2 +
 docs/tools/index.rst               |   1 +
 docs/tools/qemu-storage-daemon.rst | 121 +++++++++++++++++++++++++++++
 3 files changed, 124 insertions(+)
 create mode 100644 docs/tools/qemu-storage-daemon.rst

diff --git a/docs/tools/conf.py b/docs/tools/conf.py
index 9052d17d6d..c16290e716 100644
--- a/docs/tools/conf.py
+++ b/docs/tools/conf.py
@@ -20,6 +20,8 @@ html_theme_options['description'] = \
 man_pages = [
     ('qemu-img', 'qemu-img', u'QEMU disk image utility',
      ['Fabrice Bellard'], 1),
+    ('qemu-storage-daemon', 'qemu-storage-daemon', u'QEMU storage daemon',
+     [], 1),
     ('qemu-nbd', 'qemu-nbd', u'QEMU Disk Network Block Device Server',
      ['Anthony Liguori <anthony@codemonkey.ws>'], 8),
     ('qemu-trace-stap', 'qemu-trace-stap', u'QEMU SystemTap trace tool',
diff --git a/docs/tools/index.rst b/docs/tools/index.rst
index 232ce9f3e4..9b076adb62 100644
--- a/docs/tools/index.rst
+++ b/docs/tools/index.rst
@@ -11,6 +11,7 @@ Contents:
    :maxdepth: 2
 
    qemu-img
+   qemu-storage-daemon
    qemu-nbd
    qemu-trace-stap
    virtfs-proxy-helper
diff --git a/docs/tools/qemu-storage-daemon.rst b/docs/tools/qemu-storage-daemon.rst
new file mode 100644
index 0000000000..a0b8b1a2bf
--- /dev/null
+++ b/docs/tools/qemu-storage-daemon.rst
@@ -0,0 +1,121 @@
+QEMU Storage Daemon
+===================
+
+Synopsis
+--------
+
+**qemu-storage-daemon** [options]
+
+Description
+-----------
+
+qemu-storage-daemon provides disk image functionality from QEMU, qemu-img, and
+qemu-nbd in a long-running process controlled via QMP commands without running
+a virtual machine. It can export disk images over NBD, run block job
+operations, and perform other disk-related operations. The daemon is controlled
+via a QMP monitor socket and initial configuration from the command-line.
+
+The daemon offers the following subset of QEMU features:
+
+* Blockdev nodes
+* Block jobs
+* NBD server
+* Character devices
+* Crypto and secrets
+* QMP
+
+Commands can be sent over a QEMU Monitor Protocol (QMP) connection. See the
+:manpage:`qemu-storage-daemon-qmp-ref(7)` manual page for a description of the
+commands.
+
+The daemon runs until it is stopped using the ``quit`` QMP command or
+SIGINT/SIGHUP/SIGTERM.
+
+**Warning:** Never modify images in use by a running virtual machine or any
+other process; this may destroy the image. Also, be aware that querying an
+image that is being modified by another process may encounter inconsistent
+state.
+
+Options
+-------
+
+.. program:: qemu-storage-daemon
+
+Standard options:
+
+.. option:: -h, --help
+
+  Display this help and exit
+
+.. option:: -V, --version
+
+  Display version information and exit
+
+.. option:: -T, --trace [[enable=]PATTERN][,events=FILE][,file=FILE]
+
+  .. include:: ../qemu-option-trace.rst.inc
+
+.. option:: --blockdev BLOCKDEVDEF
+
+  is a blockdev node definition. See the :manpage:`qemu(1)` manual page for a
+  description of blockdev node properties and the
+  :manpage:`qemu-block-drivers(7)` manual page for a description of
+  driver-specific parameters.
+
+.. option:: --chardev CHARDEVDEF
+
+  is a character device definition. See the :manpage:`qemu(1)` manual page for
+  a description of character device properties. A common character device
+  definition configures a UNIX domain socket::
+
+  --chardev socket,id=char1,path=/tmp/qmp.sock,server,nowait
+
+.. option:: --monitor MONITORDEF
+
+  is a QMP monitor definition. See the :manpage:`qemu(1)` manual page for
+  a description of QMP monitor properties. A common QMP monitor definition
+  configures a monitor on character device ``char1``::
+
+  --monitor chardev=char1
+
+.. option:: --nbd-server addr.type=inet,addr.host=<host>,addr.port=<port>[,tls-creds=<id>][,tls-authz=<id>]
+  --nbd-server addr.type=unix,addr.path=<path>[,tls-creds=<id>][,tls-authz=<id>]
+
+  is a NBD server definition. Both TCP and UNIX domain sockets are supported.
+  TLS encryption can be configured using ``--object`` tls-creds-* and authz-*
+  secrets (see below).
+
+  To configure an NBD server on UNIX domain socket path ``/tmp/nbd.sock``::
+
+  --nbd-server addr.type=unix,addr.path=/tmp/nbd.sock
+
+.. option:: --object help
+  --object <type>,help
+  --object <type>[,<property>=<value>...]
+
+  is a QEMU user creatable object definition. List object types with ``help``.
+  List object properties with ``<type>,help``. See the :manpage:`qemu(1)`
+  manual page for a description of the object properties. The most common
+  object type is a ``secret``, which is used to supply passwords and/or
+  encryption keys.
+
+Examples
+--------
+Launch the daemon with QMP monitor socket ``qmp.sock`` so clients can execute
+QMP commands::
+
+  $ qemu-storage-daemon \
+      --chardev socket,path=qmp.sock,server,nowait,id=char1 \
+      --monitor chardev=char1
+
+Export raw image file ``disk.img`` over NBD UNIX domain socket ``nbd.sock``::
+
+  $ qemu-storage-daemon \
+      --blockdev driver=file,node-name=disk,filename=disk.img \
+      --nbd-server addr.type=unix,addr.path=nbd.sock \
+      --export type=nbd,device=disk,writable=on
+
+See also
+--------
+
+:manpage:`qemu(1)`, :manpage:`qemu-block-drivers(7)`, :manpage:`qemu-storage-daemon-qmp-ref(7)`
-- 
2.26.2