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QMP: Fix error reporting in the async API

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The current asynchronous command API doesn't return a QMP response
when the async command fails.

This is easy to reproduce with the balloon command (the sole async
command we have so far): run qemu w/o the '-balloon virtio' option
and try to issue the balloon command via QMP: no response will be
sent to the client.

This commit fixes the problem by making qmp_async_cmd_handler()
return the handler's error code and then calling
monitor_protocol_emitter() if the handler has returned an error.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Luiz Capitulino 2010-06-22 19:10:46 -03:00
parent 410cbafebc
commit 5af7bbae0c
1 changed files with 8 additions and 4 deletions
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10
monitor.c
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@ -546,10 +546,10 @@ static void qmp_monitor_complete(void *opaque, QObject *ret_data)
monitor_protocol_emitter(opaque, ret_data);
}
static void qmp_async_cmd_handler(Monitor *mon, const mon_cmd_t *cmd,
static int qmp_async_cmd_handler(Monitor *mon, const mon_cmd_t *cmd,
const QDict *params)
{
cmd->mhandler.cmd_async(mon, params, qmp_monitor_complete, mon);
return cmd->mhandler.cmd_async(mon, params, qmp_monitor_complete, mon);
}
static void qmp_async_info_handler(Monitor *mon, const mon_cmd_t *cmd)
@ -4239,7 +4239,11 @@ static void handle_qmp_command(JSONMessageParser *parser, QList *tokens)
}
if (monitor_handler_is_async(cmd)) {
qmp_async_cmd_handler(mon, cmd, args);
err = qmp_async_cmd_handler(mon, cmd, args);
if (err) {
/* emit the error response */
goto err_out;
}
} else {
monitor_call_handler(mon, cmd, args);
}