[Qemu-devel] [PATCH for-2.11 0/5] qmp-shell non-interactive mode, delete scripts/qmp/qmp

[Qemu-devel] [PATCH for-2.11 0/5] qmp-shell non-interactive mode, delete scripts/qmp/qmp

[Eduardo Habkost]

This series adds the ability to run QMP commands
non-interactively to qmp-shell, and deletes scripts/qmp/qmp.

Eduardo Habkost (5):
  qmp-shell: Use argparse module
  qmp-shell: Pass split cmdargs to __build_cmd()
  qmp-shell: execute_cmdargs() method
  qmp-shell: Accept QMP command as argument
  Remove scripts/qmp/qmp

 scripts/qmp/qmp       | 126 --------------------------------------------------
 scripts/qmp/qmp-shell |  90 ++++++++++++++++--------------------
 2 files changed, 40 insertions(+), 176 deletions(-)
 delete mode 100755 scripts/qmp/qmp

-- 
2.9.4

[Qemu-devel] [PATCH for-2.11 1/5] qmp-shell: Use argparse module

[Eduardo Habkost]

It makes command-line parsing and generation of help text much
simpler.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qmp/qmp-shell | 61 +++++++++++++++++----------------------------------
 1 file changed, 20 insertions(+), 41 deletions(-)

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 860ffb2..c276b90 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -73,6 +73,7 @@ import sys
 import os
 import errno
 import atexit
+import argparse
 
 class QMPCompleter(list):
     def complete(self, text, state):
@@ -393,61 +394,39 @@ def die(msg):
     sys.stderr.write('ERROR: %s\n' % msg)
     sys.exit(1)
 
-def fail_cmdline(option=None):
-    if option:
-        sys.stderr.write('ERROR: bad command-line option \'%s\'\n' % option)
-    sys.stderr.write('qmp-shell [ -v ] [ -p ] [ -H ] [ -N ] < UNIX socket path> | < TCP address:port >\n')
-    sys.stderr.write('    -v     Verbose (echo command sent and received)\n')
-    sys.stderr.write('    -p     Pretty-print JSON\n')
-    sys.stderr.write('    -H     Use HMP interface\n')
-    sys.stderr.write('    -N     Skip negotiate (for qemu-ga)\n')
-    sys.exit(1)
-
 def main():
-    addr = ''
-    qemu = None
-    hmp = False
-    pretty = False
-    verbose = False
-    negotiate = True
+    parser = argparse.ArgumentParser(description='QMP shell utility')
+    parser.add_argument('-v', action='store_true', dest='verbose',
+        help='Verbose (echo command sent and received)')
+    parser.add_argument('-p', action='store_true', dest='pretty',
+        help='Pretty-print JSON')
+    parser.add_argument('-H', action='store_true', dest='hmp',
+        help='Use HMP interface')
+    parser.add_argument('-N', action='store_false', dest='negotiate',
+        default=True, help='Skip negotiate (for qemu-ga)')
+    parser.add_argument('addr', metavar='ADDRESS',
+        help='QMP socket address (Unix socket path or TCP address:port)')
+    args = parser.parse_args()
 
     try:
-        for arg in sys.argv[1:]:
-            if arg == "-H":
-                if qemu is not None:
-                    fail_cmdline(arg)
-                hmp = True
-            elif arg == "-p":
-                pretty = True
-            elif arg == "-N":
-                negotiate = False
-            elif arg == "-v":
-                verbose = True
-            else:
-                if qemu is not None:
-                    fail_cmdline(arg)
-                if hmp:
-                    qemu = HMPShell(arg)
-                else:
-                    qemu = QMPShell(arg, pretty)
-                addr = arg
-
-        if qemu is None:
-            fail_cmdline()
+        if args.hmp:
+            qemu = HMPShell(args.addr)
+        else:
+            qemu = QMPShell(args.addr, args.pretty)
     except QMPShellBadPort:
         die('bad port number in command-line')
 
     try:
-        qemu.connect(negotiate)
+        qemu.connect(args.negotiate)
     except qmp.QMPConnectError:
         die('Didn\'t get QMP greeting message')
     except qmp.QMPCapabilitiesError:
         die('Could not negotiate capabilities')
     except qemu.error:
-        die('Could not connect to %s' % addr)
+        die('Could not connect to %s' % args.addr)
 
     qemu.show_banner()
-    qemu.set_verbosity(verbose)
+    qemu.set_verbosity(args.verbose)
     while qemu.read_exec_command(qemu.get_prompt()):
         pass
     qemu.close()
-- 
2.9.4

[Qemu-devel] [PATCH for-2.11 2/5] qmp-shell: Pass split cmdargs to __build_cmd()

[Eduardo Habkost]

This will allow us to implement a method to run a command that is
already split in a list.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qmp/qmp-shell | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index c276b90..5fe6162 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -212,15 +212,13 @@ class QMPShell(qmp.QEMUMonitorProtocol):
                     raise QMPShellError('Cannot set "%s" multiple times' % key)
             parent[optpath[-1]] = value
 
-    def __build_cmd(self, cmdline):
+    def __build_cmd(self, cmdargs):
         """
         Build a QMP input object from a user provided command-line in the
         following format:
 
             < command-name > [ arg-name1=arg1 ] ... [ arg-nameN=argN ]
         """
-        cmdargs = cmdline.split()
-
         # Transactional CLI entry/exit:
         if cmdargs[0] == 'transaction(':
             self._transmode = True
@@ -247,7 +245,7 @@ class QMPShell(qmp.QEMUMonitorProtocol):
                 finalize = True
             self.__cli_expr(cmdargs[1:], action['data'])
             self._actions.append(action)
-            return self.__build_cmd(')') if finalize else None
+            return self.__build_cmd([')']) if finalize else None
 
         # Standard command: parse and return it to be executed.
         qmpcmd = { 'execute': cmdargs[0], 'arguments': {} }
@@ -262,8 +260,9 @@ class QMPShell(qmp.QEMUMonitorProtocol):
         print str(jsobj)
 
     def _execute_cmd(self, cmdline):
+        cmdargs = cmdline.split()
         try:
-            qmpcmd = self.__build_cmd(cmdline)
+            qmpcmd = self.__build_cmd(cmdargs)
         except Exception as e:
             print 'Error while parsing command line: %s' % e
             print 'command format: <command-name> ',
-- 
2.9.4

[Qemu-devel] [PATCH for-2.11 3/5] qmp-shell: execute_cmdargs() method

[Eduardo Habkost]

This will allow us to execute a command that was already split in
a list.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qmp/qmp-shell | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 5fe6162..6113aaf 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -260,7 +260,9 @@ class QMPShell(qmp.QEMUMonitorProtocol):
         print str(jsobj)
 
     def _execute_cmd(self, cmdline):
-        cmdargs = cmdline.split()
+        return self.execute_cmdargs(cmdline.split())
+
+    def execute_cmdargs(self, cmdargs):
         try:
             qmpcmd = self.__build_cmd(cmdargs)
         except Exception as e:
@@ -386,6 +388,9 @@ class HMPShell(QMPShell):
             print '%s: %s' % (resp['error']['class'], resp['error']['desc'])
         return True
 
+    def execute_cmdargs(self, cmdargs):
+        return self._execute_cmd(' '.join(cmdargs))
+
     def show_banner(self):
         QMPShell.show_banner(self, msg='Welcome to the HMP shell!')
 
-- 
2.9.4

[Qemu-devel] [PATCH for-2.11 4/5] qmp-shell: Accept QMP command as argument

[Eduardo Habkost]

This is useful for testing QMP commands in scripts.

Example usage, combined with 'jq' for filtering the results:

  $ ./scripts/qmp/qmp-shell /tmp/qmp qom-list path=/ | jq -r .return[].name
  machine
  type
  chardevs
  backend
  $

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qmp/qmp-shell | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 6113aaf..947fc36 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -410,6 +410,10 @@ def main():
         default=True, help='Skip negotiate (for qemu-ga)')
     parser.add_argument('addr', metavar='ADDRESS',
         help='QMP socket address (Unix socket path or TCP address:port)')
+    parser.add_argument('cmd', metavar='COMMAND', nargs='?',
+        help='QMP command to be exeucted')
+    parser.add_argument('cmdargs', metavar='ARG=VALUE', nargs='*',
+        help='Argument to QMP command')
     args = parser.parse_args()
 
     try:
@@ -429,10 +433,13 @@ def main():
     except qemu.error:
         die('Could not connect to %s' % args.addr)
 
-    qemu.show_banner()
     qemu.set_verbosity(args.verbose)
-    while qemu.read_exec_command(qemu.get_prompt()):
-        pass
+    if args.cmd:
+        qemu.execute_cmdargs([args.cmd] + args.cmdargs)
+    else:
+        qemu.show_banner()
+        while qemu.read_exec_command(qemu.get_prompt()):
+            pass
     qemu.close()
 
 if __name__ == '__main__':
-- 
2.9.4

[Qemu-devel] [PATCH for-2.11 5/5] Remove scripts/qmp/qmp

[Eduardo Habkost]

The only purpose of scripts/qmp/qmp was the ability to run QMP
commands non-interactively.  Now it is possible to run qmp-shell
non-interactively by providing a QMP command a command-line
argument, making scripts/qmp/qmp obsolete.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qmp/qmp | 126 --------------------------------------------------------
 1 file changed, 126 deletions(-)
 delete mode 100755 scripts/qmp/qmp

diff --git a/scripts/qmp/qmp b/scripts/qmp/qmp
deleted file mode 100755
index 514b539..0000000
--- a/scripts/qmp/qmp
+++ /dev/null
@@ -1,126 +0,0 @@
-#!/usr/bin/python
-#
-# QMP command line tool
-#
-# Copyright IBM, Corp. 2011
-#
-# Authors:
-#  Anthony Liguori <aliguori@us.ibm.com>
-#
-# This work is licensed under the terms of the GNU GPLv2 or later.
-# See the COPYING file in the top-level directory.
-
-import sys, os
-from qmp import QEMUMonitorProtocol
-
-def print_response(rsp, prefix=[]):
-    if type(rsp) == list:
-        i = 0
-        for item in rsp:
-            if prefix == []:
-                prefix = ['item']
-            print_response(item, prefix[:-1] + ['%s[%d]' % (prefix[-1], i)])
-            i += 1
-    elif type(rsp) == dict:
-        for key in rsp.keys():
-            print_response(rsp[key], prefix + [key])
-    else:
-        if len(prefix):
-            print '%s: %s' % ('.'.join(prefix), rsp)
-        else:
-            print '%s' % (rsp)
-
-def main(args):
-    path = None
-
-    # Use QMP_PATH if it's set
-    if os.environ.has_key('QMP_PATH'):
-        path = os.environ['QMP_PATH']
-
-    while len(args):
-        arg = args[0]
-
-        if arg.startswith('--'):
-            arg = arg[2:]
-            if arg.find('=') == -1:
-                value = True
-            else:
-                arg, value = arg.split('=', 1)
-
-            if arg in ['path']:
-                if type(value) == str:
-                    path = value
-            elif arg in ['help']:
-                os.execlp('man', 'man', 'qmp')
-            else:
-                print 'Unknown argument "%s"' % arg
-
-            args = args[1:]
-        else:
-            break
-
-    if not path:
-        print "QMP path isn't set, use --path=qmp-monitor-address or set QMP_PATH"
-        return 1
-
-    if len(args):
-        command, args = args[0], args[1:]
-    else:
-        print 'No command found'
-        print 'Usage: "qmp [--path=qmp-monitor-address] qmp-cmd arguments"'
-        return 1
-
-    if command in ['help']:
-        os.execlp('man', 'man', 'qmp')
-
-    srv = QEMUMonitorProtocol(path)
-    srv.connect()
-
-    def do_command(srv, cmd, **kwds):
-        rsp = srv.cmd(cmd, kwds)
-        if rsp.has_key('error'):
-            raise Exception(rsp['error']['desc'])
-        return rsp['return']
-
-    commands = map(lambda x: x['name'], do_command(srv, 'query-commands'))
-
-    srv.close()
-
-    if command not in commands:
-        fullcmd = 'qmp-%s' % command
-        try:
-            os.environ['QMP_PATH'] = path
-            os.execvp(fullcmd, [fullcmd] + args)
-        except OSError as exc:
-            if exc.errno == 2:
-                print 'Command "%s" not found.' % (fullcmd)
-                return 1
-            raise
-        return 0
-
-    srv = QEMUMonitorProtocol(path)
-    srv.connect()
-
-    arguments = {}
-    for arg in args:
-        if not arg.startswith('--'):
-            print 'Unknown argument "%s"' % arg
-            return 1
-
-        arg = arg[2:]
-        if arg.find('=') == -1:
-            value = True
-        else:
-            arg, value = arg.split('=', 1)
-
-        if arg in ['help']:
-            os.execlp('man', 'man', 'qmp-%s' % command)
-            return 1
-
-        arguments[arg] = value
-
-    rsp = do_command(srv, command, **arguments)
-    print_response(rsp)
-
-if __name__ == '__main__':
-    sys.exit(main(sys.argv[1:]))
-- 
2.9.4

Re: [Qemu-devel] [PATCH for-2.11 0/5] qmp-shell non-interactive mode, delete scripts/qmp/qmp

[Fam Zheng]

On Fri, 08/04 18:36, Eduardo Habkost wrote:
> This series adds the ability to run QMP commands
> non-interactively to qmp-shell, and deletes scripts/qmp/qmp.

Hmm, not so simple:

$ git grep 'import qmp'
scripts/qemu.py:import qmp.qmp
scripts/qmp/qemu-ga-client:import qmp
scripts/qmp/qmp-shell:import qmp
scripts/qtest.py:import qmp.qmp
tests/migration/guestperf/engine.py:import qmp.qmp

Fam

Re: [Qemu-devel] [PATCH for-2.11 0/5] qmp-shell non-interactive mode, delete scripts/qmp/qmp

[Eduardo Habkost]

On Sat, Aug 05, 2017 at 10:56:20PM +0800, Fam Zheng wrote:
> On Fri, 08/04 18:36, Eduardo Habkost wrote:
> > This series adds the ability to run QMP commands
> > non-interactively to qmp-shell, and deletes scripts/qmp/qmp.
> 
> Hmm, not so simple:
> 
> $ git grep 'import qmp'
> scripts/qemu.py:import qmp.qmp
> scripts/qmp/qemu-ga-client:import qmp
> scripts/qmp/qmp-shell:import qmp
> scripts/qtest.py:import qmp.qmp
> tests/migration/guestperf/engine.py:import qmp.qmp

I'm deleting scripts/qmp/qmp, not scripts/qmp/qmp.py.

-- 
Eduardo

Re: [Qemu-devel] [PATCH for-2.11 0/5] qmp-shell non-interactive mode, delete scripts/qmp/qmp

[Fam Zheng]

On Sat, 08/05 16:11, Eduardo Habkost wrote:
> On Sat, Aug 05, 2017 at 10:56:20PM +0800, Fam Zheng wrote:
> > On Fri, 08/04 18:36, Eduardo Habkost wrote:
> > > This series adds the ability to run QMP commands
> > > non-interactively to qmp-shell, and deletes scripts/qmp/qmp.
> > 
> > Hmm, not so simple:
> > 
> > $ git grep 'import qmp'
> > scripts/qemu.py:import qmp.qmp
> > scripts/qmp/qemu-ga-client:import qmp
> > scripts/qmp/qmp-shell:import qmp
> > scripts/qtest.py:import qmp.qmp
> > tests/migration/guestperf/engine.py:import qmp.qmp
> 
> I'm deleting scripts/qmp/qmp, not scripts/qmp/qmp.py.

Yeah, OK, I was confused.

Fam

Re: [Qemu-devel] [PATCH for-2.11 0/5] qmp-shell non-interactive mode, delete scripts/qmp/qmp

[John Snow]

On 08/04/2017 05:36 PM, Eduardo Habkost wrote:
> This series adds the ability to run QMP commands
> non-interactively to qmp-shell, and deletes scripts/qmp/qmp.
> 
> Eduardo Habkost (5):
>   qmp-shell: Use argparse module
>   qmp-shell: Pass split cmdargs to __build_cmd()
>   qmp-shell: execute_cmdargs() method
>   qmp-shell: Accept QMP command as argument
>   Remove scripts/qmp/qmp
> 
>  scripts/qmp/qmp       | 126 --------------------------------------------------
>  scripts/qmp/qmp-shell |  90 ++++++++++++++++--------------------
>  2 files changed, 40 insertions(+), 176 deletions(-)
>  delete mode 100755 scripts/qmp/qmp
> 

Assuming there are no reasons to keep the old script around (I certainly
never used it) this appears to be fine. May as well fortify one really
good QMP tool instead of a dozen little half baked ones.

Tested-by: John Snow <jsnow@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

Re: [Qemu-devel] [PATCH for-2.11 1/5] qmp-shell: Use argparse module

[Stefan Hajnoczi]

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On Fri, Aug 04, 2017 at 06:36:21PM -0300, Eduardo Habkost wrote:
> It makes command-line parsing and generation of help text much
> simpler.
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  scripts/qmp/qmp-shell | 61 +++++++++++++++++----------------------------------
>  1 file changed, 20 insertions(+), 41 deletions(-)

The minimum Python version is 2.6.  The argparse module was introduced
in Python 2.7 so we cannot use it without increasing the minimum Python
version:

https://docs.python.org/2.6/modindex.html

I suggest holding off on this for now.

Stefan

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Re: [Qemu-devel] [PATCH for-2.11 2/5] qmp-shell: Pass split cmdargs to __build_cmd()

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 376 bytes --]

On Fri, Aug 04, 2017 at 06:36:22PM -0300, Eduardo Habkost wrote:
> This will allow us to implement a method to run a command that is
> already split in a list.
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  scripts/qmp/qmp-shell | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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Re: [Qemu-devel] [PATCH for-2.11 3/5] qmp-shell: execute_cmdargs() method

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 356 bytes --]

On Fri, Aug 04, 2017 at 06:36:23PM -0300, Eduardo Habkost wrote:
> This will allow us to execute a command that was already split in
> a list.
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  scripts/qmp/qmp-shell | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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Re: [Qemu-devel] [PATCH for-2.11 1/5] qmp-shell: Use argparse module

[Daniel P. Berrange]

On Tue, Aug 08, 2017 at 11:07:21AM +0100, Stefan Hajnoczi wrote:
> On Fri, Aug 04, 2017 at 06:36:21PM -0300, Eduardo Habkost wrote:
> > It makes command-line parsing and generation of help text much
> > simpler.
> > 
> > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> > ---
> >  scripts/qmp/qmp-shell | 61 +++++++++++++++++----------------------------------
> >  1 file changed, 20 insertions(+), 41 deletions(-)
> 
> The minimum Python version is 2.6.  The argparse module was introduced
> in Python 2.7 so we cannot use it without increasing the minimum Python
> version:
> 
> https://docs.python.org/2.6/modindex.html
> 
> I suggest holding off on this for now.

Although its deprecated, perhaps we can use  optparse instead ? It is
available in py2 & 3 and very similar to argparse.

Regards,
Daniel
-- 
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Re: [Qemu-devel] [PATCH for-2.11 4/5] qmp-shell: Accept QMP command as argument

[Stefan Hajnoczi]

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On Fri, Aug 04, 2017 at 06:36:24PM -0300, Eduardo Habkost wrote:
> This is useful for testing QMP commands in scripts.
> 
> Example usage, combined with 'jq' for filtering the results:
> 
>   $ ./scripts/qmp/qmp-shell /tmp/qmp qom-list path=/ | jq -r .return[].name
>   machine
>   type
>   chardevs
>   backend
>   $
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  scripts/qmp/qmp-shell | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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Re: [Qemu-devel] [PATCH for-2.11 5/5] Remove scripts/qmp/qmp

[Stefan Hajnoczi]

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On Fri, Aug 04, 2017 at 06:36:25PM -0300, Eduardo Habkost wrote:
> The only purpose of scripts/qmp/qmp was the ability to run QMP
> commands non-interactively.  Now it is possible to run qmp-shell
> non-interactively by providing a QMP command a command-line
> argument, making scripts/qmp/qmp obsolete.
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  scripts/qmp/qmp | 126 --------------------------------------------------------
>  1 file changed, 126 deletions(-)
>  delete mode 100755 scripts/qmp/qmp

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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Re: [Qemu-devel] [PATCH for-2.11 1/5] qmp-shell: Use argparse module

[Eduardo Habkost]

On Tue, Aug 08, 2017 at 11:07:21AM +0100, Stefan Hajnoczi wrote:
> On Fri, Aug 04, 2017 at 06:36:21PM -0300, Eduardo Habkost wrote:
> > It makes command-line parsing and generation of help text much
> > simpler.
> > 
> > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> > ---
> >  scripts/qmp/qmp-shell | 61 +++++++++++++++++----------------------------------
> >  1 file changed, 20 insertions(+), 41 deletions(-)
> 
> The minimum Python version is 2.6.  The argparse module was introduced
> in Python 2.7 so we cannot use it without increasing the minimum Python
> version:
> 
> https://docs.python.org/2.6/modindex.html
> 
> I suggest holding off on this for now.

2.6 is the minimum Python version for what, exactly?  Is it for
building QEMU?

Note that qmp-shell is a tool for developers, not required for
building or running QEMU.  People who really want to run
qmp-shell on a python-2.6 system can still install argparse if
they want to use qmp-shell.

I could backport the code to optparse.  But should we add code
that relies on a deprecated module, if developers running Python
2.6 can install argparse?

-- 
Eduardo