Merge remote-tracking branch 'qmp/queue/qmp' into staging

* qmp/queue/qmp:
  block: live snapshot documentation tweaks
  input: index_from_key(): drop unused code
  qmp: qmp_send_key(): accept key codes in hex
  input: qmp_send_key(): simplify
  hmp: dump-guest-memory: hardcode protocol argument to "file:"
  qmp: dump-guest-memory: don't spin if non-blocking fd would block
  qmp: dump-guest-memory: improve schema doc (again)
  qapi: convert add_client
  monitor: add Error * argument to monitor_get_fd
  pci-assign: use monitor_handle_fd_param
  qapi: add "unix" to the set of reserved words
  qapi: do not protect enum values from namespace pollution
  Add qemu-ga-client script
  Support settimeout in QEMUMonitorProtocol
  Make negotiation optional in QEMUMonitorProtocol

2 files changed, 308 insertions, 3 deletions

diff --git a/QMP/qemu-ga-client b/QMP/qemu-ga-client
new file mode 100755
index 0000000..46676c3
--- /dev/null
+++ b/QMP/qemu-ga-client
@@ -0,0 +1,299 @@
+#!/usr/bin/python
+
+# QEMU Guest Agent Client
+#
+# Copyright (C) 2012 Ryota Ozaki <ozaki.ryota@gmail.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2.  See
+# the COPYING file in the top-level directory.
+#
+# Usage:
+#
+# Start QEMU with:
+#
+# # qemu [...] -chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 \
+#   -device virtio-serial -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0
+#
+# Run the script:
+#
+# $ qemu-ga-client --address=/tmp/qga.sock <command> [args...]
+#
+# or
+#
+# $ export QGA_CLIENT_ADDRESS=/tmp/qga.sock
+# $ qemu-ga-client <command> [args...]
+#
+# For example:
+#
+# $ qemu-ga-client cat /etc/resolv.conf
+# # Generated by NetworkManager
+# nameserver 10.0.2.3
+# $ qemu-ga-client fsfreeze status
+# thawed
+# $ qemu-ga-client fsfreeze freeze
+# 2 filesystems frozen
+#
+# See also: http://wiki.qemu.org/Features/QAPI/GuestAgent
+#
+
+import base64
+import random
+
+import qmp
+
+
+class QemuGuestAgent(qmp.QEMUMonitorProtocol):
+    def __getattr__(self, name):
+        def wrapper(**kwds):
+            return self.command('guest-' + name.replace('_', '-'), **kwds)
+        return wrapper
+
+
+class QemuGuestAgentClient:
+    error = QemuGuestAgent.error
+
+    def __init__(self, address):
+        self.qga = QemuGuestAgent(address)
+        self.qga.connect(negotiate=False)
+
+    def sync(self, timeout=3):
+        # Avoid being blocked forever
+        if not self.ping(timeout):
+            raise EnvironmentError('Agent seems not alive')
+        uid = random.randint(0, (1 << 32) - 1)
+        while True:
+            ret = self.qga.sync(id=uid)
+            if isinstance(ret, int) and int(ret) == uid:
+                break
+
+    def __file_read_all(self, handle):
+        eof = False
+        data = ''
+        while not eof:
+            ret = self.qga.file_read(handle=handle, count=1024)
+            _data = base64.b64decode(ret['buf-b64'])
+            data += _data
+            eof = ret['eof']
+        return data
+
+    def read(self, path):
+        handle = self.qga.file_open(path=path)
+        try:
+            data = self.__file_read_all(handle)
+        finally:
+            self.qga.file_close(handle=handle)
+        return data
+
+    def info(self):
+        info = self.qga.info()
+
+        msgs = []
+        msgs.append('version: ' + info['version'])
+        msgs.append('supported_commands:')
+        enabled = [c['name'] for c in info['supported_commands'] if c['enabled']]
+        msgs.append('\tenabled: ' + ', '.join(enabled))
+        disabled = [c['name'] for c in info['supported_commands'] if not c['enabled']]
+        msgs.append('\tdisabled: ' + ', '.join(disabled))
+
+        return '\n'.join(msgs)
+
+    def __gen_ipv4_netmask(self, prefixlen):
+        mask = int('1' * prefixlen + '0' * (32 - prefixlen), 2)
+        return '.'.join([str(mask >> 24),
+                         str((mask >> 16) & 0xff),
+                         str((mask >> 8) & 0xff),
+                         str(mask & 0xff)])
+
+    def ifconfig(self):
+        nifs = self.qga.network_get_interfaces()
+
+        msgs = []
+        for nif in nifs:
+            msgs.append(nif['name'] + ':')
+            if 'ip-addresses' in nif:
+                for ipaddr in nif['ip-addresses']:
+                    if ipaddr['ip-address-type'] == 'ipv4':
+                        addr = ipaddr['ip-address']
+                        mask = self.__gen_ipv4_netmask(int(ipaddr['prefix']))
+                        msgs.append("\tinet %s  netmask %s" % (addr, mask))
+                    elif ipaddr['ip-address-type'] == 'ipv6':
+                        addr = ipaddr['ip-address']
+                        prefix = ipaddr['prefix']
+                        msgs.append("\tinet6 %s  prefixlen %s" % (addr, prefix))
+            if nif['hardware-address'] != '00:00:00:00:00:00':
+                msgs.append("\tether " + nif['hardware-address'])
+
+        return '\n'.join(msgs)
+
+    def ping(self, timeout):
+        self.qga.settimeout(timeout)
+        try:
+            self.qga.ping()
+        except self.qga.timeout:
+            return False
+        return True
+
+    def fsfreeze(self, cmd):
+        if cmd not in ['status', 'freeze', 'thaw']:
+            raise StandardError('Invalid command: ' + cmd)
+
+        return getattr(self.qga, 'fsfreeze' + '_' + cmd)()
+
+    def fstrim(self, minimum=0):
+        return getattr(self.qga, 'fstrim')(minimum=minimum)
+
+    def suspend(self, mode):
+        if mode not in ['disk', 'ram', 'hybrid']:
+            raise StandardError('Invalid mode: ' + mode)
+
+        try:
+            getattr(self.qga, 'suspend' + '_' + mode)()
+            # On error exception will raise
+        except self.qga.timeout:
+            # On success command will timed out
+            return
+
+    def shutdown(self, mode='powerdown'):
+        if mode not in ['powerdown', 'halt', 'reboot']:
+            raise StandardError('Invalid mode: ' + mode)
+
+        try:
+            self.qga.shutdown(mode=mode)
+        except self.qga.timeout:
+            return
+
+
+def _cmd_cat(client, args):
+    if len(args) != 1:
+        print('Invalid argument')
+        print('Usage: cat <file>')
+        sys.exit(1)
+    print(client.read(args[0]))
+
+
+def _cmd_fsfreeze(client, args):
+    usage = 'Usage: fsfreeze status|freeze|thaw'
+    if len(args) != 1:
+        print('Invalid argument')
+        print(usage)
+        sys.exit(1)
+    if args[0] not in ['status', 'freeze', 'thaw']:
+        print('Invalid command: ' + args[0])
+        print(usage)
+        sys.exit(1)
+    cmd = args[0]
+    ret = client.fsfreeze(cmd)
+    if cmd == 'status':
+        print(ret)
+    elif cmd == 'freeze':
+        print("%d filesystems frozen" % ret)
+    else:
+        print("%d filesystems thawed" % ret)
+
+
+def _cmd_fstrim(client, args):
+    if len(args) == 0:
+        minimum = 0
+    else:
+        minimum = int(args[0])
+    print(client.fstrim(minimum))
+
+
+def _cmd_ifconfig(client, args):
+    print(client.ifconfig())
+
+
+def _cmd_info(client, args):
+    print(client.info())
+
+
+def _cmd_ping(client, args):
+    if len(args) == 0:
+        timeout = 3
+    else:
+        timeout = float(args[0])
+    alive = client.ping(timeout)
+    if not alive:
+        print("Not responded in %s sec" % args[0])
+        sys.exit(1)
+
+
+def _cmd_suspend(client, args):
+    usage = 'Usage: suspend disk|ram|hybrid'
+    if len(args) != 1:
+        print('Less argument')
+        print(usage)
+        sys.exit(1)
+    if args[0] not in ['disk', 'ram', 'hybrid']:
+        print('Invalid command: ' + args[0])
+        print(usage)
+        sys.exit(1)
+    client.suspend(args[0])
+
+
+def _cmd_shutdown(client, args):
+    client.shutdown()
+_cmd_powerdown = _cmd_shutdown
+
+
+def _cmd_halt(client, args):
+    client.shutdown('halt')
+
+
+def _cmd_reboot(client, args):
+    client.shutdown('reboot')
+
+
+commands = [m.replace('_cmd_', '') for m in dir() if '_cmd_' in m]
+
+
+def main(address, cmd, args):
+    if not os.path.exists(address):
+        print('%s not found' % address)
+        sys.exit(1)
+
+    if cmd not in commands:
+        print('Invalid command: ' + cmd)
+        print('Available commands: ' + ', '.join(commands))
+        sys.exit(1)
+
+    try:
+        client = QemuGuestAgentClient(address)
+    except QemuGuestAgent.error, e:
+        import errno
+
+        print(e)
+        if e.errno == errno.ECONNREFUSED:
+            print('Hint: qemu is not running?')
+        sys.exit(1)
+
+    if cmd != 'ping':
+        client.sync()
+
+    globals()['_cmd_' + cmd](client, args)
+
+
+if __name__ == '__main__':
+    import sys
+    import os
+    import optparse
+
+    address = os.environ['QGA_CLIENT_ADDRESS'] if 'QGA_CLIENT_ADDRESS' in os.environ else None
+
+    usage = "%prog [--address=<unix_path>|<ipv4_address>] <command> [args...]\n"
+    usage += '<command>: ' + ', '.join(commands)
+    parser = optparse.OptionParser(usage=usage)
+    parser.add_option('--address', action='store', type='string',
+                      default=address, help='Specify a ip:port pair or a unix socket path')
+    options, args = parser.parse_args()
+
+    address = options.address
+    if address is None:
+        parser.error('address is not specified')
+        sys.exit(1)
+
+    if len(args) == 0:
+        parser.error('Less argument')
+        sys.exit(1)
+
+    main(address, args[0], args[1:])
diff --git a/QMP/qmp.py b/QMP/qmp.py
index 36ecc1d..33c7d36 100644
--- a/QMP/qmp.py
+++ b/QMP/qmp.py
@@ -49,7 +49,6 @@ class QEMUMonitorProtocol:
         return socket.socket(family, socket.SOCK_STREAM)
 
     def __negotiate_capabilities(self):
-        self.__sockfile = self.__sock.makefile()
         greeting = self.__json_read()
         if greeting is None or not greeting.has_key('QMP'):
             raise QMPConnectError
@@ -73,7 +72,7 @@ class QEMUMonitorProtocol:
 
     error = socket.error
 
-    def connect(self):
+    def connect(self, negotiate=True):
         """
         Connect to the QMP Monitor and perform capabilities negotiation.
 
@@ -83,7 +82,9 @@ class QEMUMonitorProtocol:
         @raise QMPCapabilitiesError if fails to negotiate capabilities
         """
         self.__sock.connect(self.__address)
-        return self.__negotiate_capabilities()
+        self.__sockfile = self.__sock.makefile()
+        if negotiate:
+            return self.__negotiate_capabilities()
 
     def accept(self):
         """
@@ -161,3 +162,8 @@ class QEMUMonitorProtocol:
     def close(self):
         self.__sock.close()
         self.__sockfile.close()
+
+    timeout = socket.timeout
+
+    def settimeout(self, timeout):
+        self.__sock.settimeout(timeout)