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qemu: monitor: Factor out and document code to format QMP command

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Move formatting of the qemu command out of qemuMonitorJSONMakeCommandRaw
to qemuMonitorJSONMakeCommandInternal to allow greater reusability and
document the function better.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
Peter Krempa 2018-02-20 17:56:46 +01:00
parent e969af4cec
commit a6178a6610
1 changed files with 50 additions and 22 deletions
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72
src/qemu/qemu_monitor_json.c
View File

@ -464,40 +464,68 @@ qemuMonitorJSONHasError(virJSONValuePtr reply,
}
/* Top-level commands and nested transaction list elements share a
* common structure for everything except the dictionary names. */
static virJSONValuePtr ATTRIBUTE_SENTINEL
qemuMonitorJSONMakeCommandRaw(bool wrap, const char *cmdname, ...)
/**
* qemuMonitorJSONMakeCommandInternal:
* @cmdname: QMP command name
* @arguments: a JSON object containing command arguments or NULL
* @transaction: format the command as arguments for the 'transaction' command
*
* Create a JSON object used on the QMP monitor to call a command. If
* @transaction is true, the returned object is formatted to be used as a member
* of the 'transaction' command.
*
* Note that @arguments is always consumed and should not be referenced after
* the call to this function.
*/
static virJSONValuePtr
qemuMonitorJSONMakeCommandInternal(const char *cmdname,
virJSONValuePtr arguments,
bool transaction)
{
virJSONValuePtr obj;
virJSONValuePtr cmd = NULL;
virJSONValuePtr ret = NULL;
if (!transaction) {
if (virJSONValueObjectCreate(&cmd,
"s:execute", cmdname,
"A:arguments", &arguments, NULL) < 0)
goto cleanup;
} else {
if (virJSONValueObjectCreate(&cmd,
"s:type", cmdname,
"A:data", &arguments, NULL) < 0)
goto cleanup;
}
VIR_STEAL_PTR(ret, cmd);
cleanup:
virJSONValueFree(arguments);
virJSONValueFree(cmd);
return ret;
}
static virJSONValuePtr ATTRIBUTE_SENTINEL
qemuMonitorJSONMakeCommandRaw(bool transaction,
const char *cmdname,
...)
{
virJSONValuePtr obj = NULL;
virJSONValuePtr jargs = NULL;
va_list args;
va_start(args, cmdname);
if (!(obj = virJSONValueNewObject()))
goto error;
if (virJSONValueObjectAppendString(obj, wrap ? "type" : "execute",
cmdname) < 0)
goto error;
if (virJSONValueObjectCreateVArgs(&jargs, args) < 0)
goto error;
goto cleanup;
if (jargs &&
virJSONValueObjectAppend(obj, wrap ? "data" : "arguments", jargs) < 0)
goto error;
obj = qemuMonitorJSONMakeCommandInternal(cmdname, jargs, transaction);
cleanup:
va_end(args);
return obj;
error:
virJSONValueFree(obj);
virJSONValueFree(jargs);
va_end(args);
return NULL;
}
#define qemuMonitorJSONMakeCommand(cmdname, ...) \