@@ -49,6 +49,7 @@ bool qmp_command_is_enabled(const QmpCommand *cmd);
const char *qmp_command_name(const QmpCommand *cmd);
bool qmp_has_success_response(const QmpCommand *cmd);
QObject *qmp_build_error_object(Error *err);
+bool qmp_is_oob(const QObject *request);
typedef void (*qmp_cmd_callback_fn)(QmpCommand *cmd, void *opaque);
@@ -4025,6 +4025,7 @@ static void monitor_qmp_bh_dispatcher(void *data)
if (!req_obj) {
break;
}
+ trace_monitor_qmp_cmd_in_band(qobject_get_try_str(req_obj->id));
monitor_qmp_dispatch_one(req_obj);
}
}
@@ -4051,6 +4052,14 @@ static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens,
return;
}
+ if (!qmp_oob_enabled(mon) && qmp_is_oob(req)) {
+ error_setg(&err, "Out-Of-Band is only allowed "
+ "when OOB is enabled.");
+ monitor_qmp_respond(mon, NULL, err, NULL);
+ qobject_decref(req);
+ return;
+ }
+
qdict = qobject_to_qdict(req);
if (qdict) {
id = qdict_get(qdict, "id");
@@ -4064,6 +4073,13 @@ static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens,
req_obj->req = req;
if (qmp_oob_enabled(mon)) {
+ if (qmp_is_oob(req)) {
+ /* Out-Of-Band (OOB) requests are executed directly in parser. */
+ trace_monitor_qmp_cmd_out_of_band(qobject_get_try_str(req_obj->id));
+ monitor_qmp_dispatch_one(req_obj);
+ return;
+ }
+
/* Drop the request if queue is full. */
if (mon->qmp.qmp_requests->length >= QMP_REQ_QUEUE_LEN_MAX) {
const char *id_str = qobject_get_try_str(id);
@@ -52,6 +52,12 @@ static QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp)
"QMP input member 'arguments' must be an object");
return NULL;
}
+ } else if (!strcmp(arg_name, "control")) {
+ if (qobject_type(arg_obj) != QTYPE_QDICT) {
+ error_setg(errp,
+ "QMP input member 'control' must be a dict");
+ return NULL;
+ }
} else {
error_setg(errp, "QMP input member '%s' is unexpected",
arg_name);
@@ -94,6 +100,11 @@ static QObject *do_qmp_dispatch(QmpCommandList *cmds, QObject *request,
return NULL;
}
+ if (qmp_is_oob(request) && !(cmd->options & QCO_ALLOW_OOB)) {
+ error_setg(errp, "The command %s does not support OOB", command);
+ return NULL;
+ }
+
if (!qdict_haskey(dict, "arguments")) {
args = qdict_new();
} else {
@@ -122,6 +133,34 @@ QObject *qmp_build_error_object(Error *err)
error_get_pretty(err));
}
+/*
+ * Detect whether a request should be run out-of-band, by quickly
+ * peeking at whether we have: { "control": { "run-oob": True } }. By
+ * default commands are run in-band.
+ */
+bool qmp_is_oob(const QObject *request)
+{
+ QDict *dict;
+ QBool *bool_obj;
+
+ dict = qobject_to_qdict(request);
+ if (!dict) {
+ return false;
+ }
+
+ dict = qdict_get_qdict(dict, "control");
+ if (!dict) {
+ return false;
+ }
+
+ bool_obj = qobject_to_qbool(qdict_get(dict, "run-oob"));
+ if (!bool_obj) {
+ return false;
+ }
+
+ return qbool_get_bool(bool_obj);
+}
+
QObject *qmp_dispatch(QmpCommandList *cmds, QObject *request)
{
Error *err = NULL;
@@ -47,6 +47,8 @@ monitor_protocol_event_emit(uint32_t event, void *data) "event=%d data=%p"
monitor_protocol_event_queue(uint32_t event, void *qdict, uint64_t rate) "event=%d data=%p rate=%" PRId64
handle_hmp_command(void *mon, const char *cmdline) "mon %p cmdline: %s"
handle_qmp_command(void *mon, const char *req) "mon %p req: %s"
+monitor_qmp_cmd_in_band(const char *id) "%s"
+monitor_qmp_cmd_out_of_band(const char *id) "%s"
# dma-helpers.c
dma_blk_io(void *dbs, void *bs, int64_t offset, bool to_dev) "dbs=%p bs=%p offset=%" PRId64 " to_dev=%d"
Having "allow-oob" to true for a command does not mean that this command will always be run in out-of-band mode. The out-of-band quick path will only be executed if we specify the extra "run-oob" flag when sending the QMP request: { "execute": "command-that-allows-oob", "arguments": { ... }, "control": { "run-oob": true } } The "control" key is introduced to store this extra flag. "control" field is used to store arguments that are shared by all the commands, rather than command specific arguments. Let "run-oob" be the first. Signed-off-by: Peter Xu <peterx@redhat.com> --- include/qapi/qmp/dispatch.h | 1 + monitor.c | 16 ++++++++++++++++ qapi/qmp-dispatch.c | 39 +++++++++++++++++++++++++++++++++++++++ trace-events | 2 ++ 4 files changed, 58 insertions(+)