Implement the user creatable QOM interface and define the monitor-qmp and monitor-hmp types in QAPI. This unlocks the ability to create them on the command line with -object or in HMP/QMP with object_add. For example: $QEMU -chardev stdio,id=monchr0 -object monitor-hmp,id=mon0,chrdev=monchr0 Initially the "prepare_delete" callback is hardcoded to return an error which means -object and object_add can be used, but object_del will fail. Support for deleting monitors will be introduced in subsequent commits. Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- monitor/hmp.c | 70 ++++++++++++++++++++++++-------------- monitor/monitor-internal.h | 1 - monitor/monitor.c | 14 ++++++-- monitor/qmp.c | 46 +++++++++++++++++-------- qapi/qom.json | 43 +++++++++++++++++++++++ stubs/monitor-internal.c | 1 + system/vl.c | 8 ++++- 7 files changed, 138 insertions(+), 45 deletions(-) diff --git a/monitor/hmp.c b/monitor/hmp.c index b8cccdcde3..2cd508f1ee 100644 --- a/monitor/hmp.c +++ b/monitor/hmp.c @@ -40,6 +40,7 @@ #include "qemu/base-arch-defs.h" #include "qemu/target-info.h" #include "qemu/units.h" +#include "qom/object_interfaces.h" #include "exec/gdbstub.h" #include "system/block-backend.h" #include "trace.h" @@ -71,10 +72,13 @@ static void monitor_hmp_set_readline(Object *obj, bool val, Error **errp) int monitor_hmp_vprintf(Monitor *mon, const char *fmt, va_list ap) G_GNUC_PRINTF(2, 0); static void monitor_hmp_accept_input(Monitor *mon); +static void monitor_hmp_complete(UserCreatable *uc, Error **errp); +static bool monitor_hmp_prepare_delete(UserCreatable *uc, Error **errp); static void monitor_hmp_class_init(ObjectClass *cls, const void *data) { MonitorClass *moncls = MONITOR_CLASS(cls); + UserCreatableClass *ucc = USER_CREATABLE_CLASS(cls); object_class_property_add_bool(cls, "readline", monitor_hmp_get_readline, @@ -82,6 +86,9 @@ static void monitor_hmp_class_init(ObjectClass *cls, const void *data) moncls->vprintf = monitor_hmp_vprintf; moncls->accept_input = monitor_hmp_accept_input; + + ucc->complete = monitor_hmp_complete; + ucc->prepare_delete = monitor_hmp_prepare_delete; } static void monitor_hmp_init(Object *obj) @@ -1604,42 +1611,53 @@ static void monitor_readline_flush(void *opaque) void monitor_new_hmp(const char *chardev_id, bool use_readline, Error **errp) { - ERRP_GUARD(); - MonitorHMP *mon; static int counter; g_autofree char *id = g_strdup_printf("hmpcompat%d", counter++); - Object *obj = object_new_with_props(TYPE_MONITOR_HMP, - object_get_objects_root(), - id, - errp, - "chardev", chardev_id, - "readline", use_readline ? "yes" : "no", - NULL); - - if (!obj) { - return; - } + object_new_with_props(TYPE_MONITOR_HMP, + object_get_objects_root(), + id, + errp, + "chardev", chardev_id, + "readline", use_readline ? "yes" : "no", + NULL); +} - mon = MONITOR_HMP(obj); +static void monitor_hmp_complete(UserCreatable *uc, Error **errp) +{ + MonitorHMP *mon = MONITOR_HMP(uc); + UserCreatableClass *ucc_parent = + USER_CREATABLE_CLASS( + object_class_get_parent( + OBJECT_CLASS(MONITOR_HMP_GET_CLASS(mon)))); + ERRP_GUARD(); - monitor_complete(MONITOR(mon), errp); + ucc_parent->complete(uc, errp); if (*errp) { - object_unparent(OBJECT(mon)); return; } - if (mon->use_readline) { - mon->rs = readline_init(monitor_readline_printf, - monitor_readline_flush, - mon, - monitor_find_completion); - monitor_read_command(mon, 0); + if (mon->parent_obj.chardev_id) { + if (mon->use_readline) { + mon->rs = readline_init(monitor_readline_printf, + monitor_readline_flush, + mon, + monitor_find_completion); + monitor_read_command(mon, 0); + } + + qemu_chr_fe_set_handlers(&mon->parent_obj.chr, + monitor_can_read, + monitor_read, + monitor_event, NULL, + &mon->parent_obj, NULL, true); + monitor_list_append(&mon->parent_obj); } +} - qemu_chr_fe_set_handlers(&mon->parent_obj.chr, - monitor_can_read, monitor_read, monitor_event, - NULL, &mon->parent_obj, NULL, true); - monitor_list_append(&mon->parent_obj); +static bool monitor_hmp_prepare_delete(UserCreatable *uc, Error **errp) +{ + error_setg(errp, "Deleting HMP monitors is not supported"); + return false; } /** diff --git a/monitor/monitor-internal.h b/monitor/monitor-internal.h index fe5703af6d..012d442a20 100644 --- a/monitor/monitor-internal.h +++ b/monitor/monitor-internal.h @@ -204,7 +204,6 @@ extern QmpCommandList qmp_commands, qmp_cap_negotiation_commands; extern QemuMutex monitor_lock; extern MonitorList mon_list; -void monitor_complete(Monitor *mon, Error **errp); bool monitor_requires_iothread(const Monitor *mon); int monitor_can_read(void *opaque); void monitor_list_append(Monitor *mon); diff --git a/monitor/monitor.c b/monitor/monitor.c index f88364a574..bf5e8a184a 100644 --- a/monitor/monitor.c +++ b/monitor/monitor.c @@ -29,6 +29,7 @@ #include "qapi/qapi-emit-events.h" #include "qapi/qapi-visit-control.h" #include "qobject/qdict.h" +#include "qom/object_interfaces.h" #include "qemu/error-report.h" #include "qemu/option.h" #include "system/qtest.h" @@ -73,7 +74,8 @@ static GHashTable *coroutine_mon; /* Maps Coroutine* to Monitor* */ MonitorList mon_list; static bool monitor_destroyed; -OBJECT_DEFINE_TYPE(Monitor, monitor, MONITOR, OBJECT); +OBJECT_DEFINE_TYPE_EXTENDED(Monitor, monitor, MONITOR, OBJECT, true, + { TYPE_USER_CREATABLE }, {}); static void monitor_finalize(Object *obj) { @@ -101,11 +103,17 @@ static void monitor_set_chardev_id(Object *obj, const char *str, Error **errp) mon->chardev_id = g_strdup(str); } +static void monitor_complete(UserCreatable *uc, Error **errp); + static void monitor_class_init(ObjectClass *cls, const void *data) { + UserCreatableClass *ucc = USER_CREATABLE_CLASS(cls); + object_class_property_add_str(cls, "chardev", monitor_get_chardev_id, monitor_set_chardev_id); + + ucc->complete = monitor_complete; } static void monitor_init(Object *obj) @@ -680,8 +688,10 @@ void monitor_init_globals(void) aio_co_schedule(iohandler_get_aio_context(), qmp_dispatcher_co); } -void monitor_complete(Monitor *mon, Error **errp) +static void monitor_complete(UserCreatable *uc, Error **errp) { + Monitor *mon = MONITOR(uc); + if (mon->chardev_id) { Chardev *chr = qemu_chr_find(mon->chardev_id); if (chr == NULL) { diff --git a/monitor/qmp.c b/monitor/qmp.c index d2a03bb7e3..0e1c3eb52b 100644 --- a/monitor/qmp.c +++ b/monitor/qmp.c @@ -31,6 +31,7 @@ #include "qobject/qdict.h" #include "qobject/qjson.h" #include "qobject/qlist.h" +#include "qom/object_interfaces.h" #include "trace.h" /* @@ -101,10 +102,13 @@ static void monitor_qmp_set_pretty(Object *obj, bool val, Error **errp) static void monitor_qmp_emit_event(Monitor *mon, QAPIEvent event, QDict *qdict); static bool monitor_qmp_requires_iothread(const Monitor *mon); +static void monitor_qmp_complete(UserCreatable *uc, Error **errp); +static bool monitor_qmp_prepare_delete(UserCreatable *uc, Error **errp); static void monitor_qmp_class_init(ObjectClass *cls, const void *data) { MonitorClass *moncls = MONITOR_CLASS(cls); + UserCreatableClass *ucc = USER_CREATABLE_CLASS(cls); object_class_property_add_bool(cls, "pretty", monitor_qmp_get_pretty, @@ -112,6 +116,9 @@ static void monitor_qmp_class_init(ObjectClass *cls, const void *data) moncls->emit_event = monitor_qmp_emit_event; moncls->requires_iothread = monitor_qmp_requires_iothread; + + ucc->complete = monitor_qmp_complete; + ucc->prepare_delete = monitor_qmp_prepare_delete; } static void handle_qmp_command(void *opaque, QObject *req, Error *err); @@ -583,25 +590,28 @@ static void monitor_qmp_setup_handlers_bh(void *opaque) void monitor_new_qmp(const char *chardev_id, bool pretty, Error **errp) { ERRP_GUARD(); - MonitorQMP *mon; static int counter; g_autofree char *id = g_strdup_printf("qmpcompat%d", counter++); - Object *obj = object_new_with_props(TYPE_MONITOR_QMP, - object_get_objects_root(), - id, - errp, - "chardev", chardev_id, - "pretty", pretty ? "yes" : "no", - NULL); - - if (!obj) { - return; - } + object_new_with_props(TYPE_MONITOR_QMP, + object_get_objects_root(), + id, + errp, + "chardev", chardev_id, + "pretty", pretty ? "yes" : "no", + NULL); +} - mon = MONITOR_QMP(obj); - monitor_complete(MONITOR(mon), errp); +static void monitor_qmp_complete(UserCreatable *uc, Error **errp) +{ + MonitorQMP *mon = MONITOR_QMP(uc); + UserCreatableClass *ucc_parent = + USER_CREATABLE_CLASS( + object_class_get_parent( + OBJECT_CLASS(MONITOR_QMP_GET_CLASS(mon)))); + ERRP_GUARD(); + + ucc_parent->complete(uc, errp); if (*errp) { - object_unparent(OBJECT(mon)); return; } @@ -633,3 +643,9 @@ void monitor_new_qmp(const char *chardev_id, bool pretty, Error **errp) monitor_list_append(&mon->parent_obj); } } + +static bool monitor_qmp_prepare_delete(UserCreatable *uc, Error **errp) +{ + error_setg(errp, "Deleting QMP monitors is not supported"); + return false; +} diff --git a/qapi/qom.json b/qapi/qom.json index dd45ac1087..6ed510858e 100644 --- a/qapi/qom.json +++ b/qapi/qom.json @@ -1187,6 +1187,45 @@ 'data': { '*cpu-affinity': ['uint16'], '*node-affinity': ['uint16'] } } +## +# @MonitorProperties: +# +# Properties for all monitors +# +# @chardev: ID of the character device providing the monitor transport +# +# Since: 11.1 +## +{ 'struct': 'MonitorProperties', + 'data': { 'chardev': 'str' }} + +## +# @MonitorHMPProperties: +# +# Properties for the HMP monitor +# +# @readline: whether to enable readline for interactive command +# usage (default: enabled) +# +# Since: 11.1 +## +{ 'struct': 'MonitorHMPProperties', + 'base': 'MonitorProperties', + 'data': { '*readline': 'bool' } } + +## +# @MonitorQMPProperties: +# +# Properties for the QMP monitor +# +# @pretty: whether to pretty print JSON responses (default: disabled) +# +# Since: 11.1 +## +{ 'struct': 'MonitorQMPProperties', + 'base': 'MonitorProperties', + 'data': { '*pretty': 'bool' } } + ## # @ObjectType: # @@ -1237,6 +1276,8 @@ 'memory-backend-ram', { 'name': 'memory-backend-shm', 'if': 'CONFIG_POSIX' }, + 'monitor-hmp', + 'monitor-qmp', 'pef-guest', { 'name': 'pr-manager-helper', 'if': 'CONFIG_LINUX' }, @@ -1315,6 +1356,8 @@ 'memory-backend-ram': 'MemoryBackendProperties', 'memory-backend-shm': { 'type': 'MemoryBackendShmProperties', 'if': 'CONFIG_POSIX' }, + 'monitor-hmp': {'type': 'MonitorHMPProperties' }, + 'monitor-qmp': {'type': 'MonitorQMPProperties' }, 'pr-manager-helper': { 'type': 'PrManagerHelperProperties', 'if': 'CONFIG_LINUX' }, 'qtest': 'QtestProperties', diff --git a/stubs/monitor-internal.c b/stubs/monitor-internal.c index 51db7588b9..59ccc4b35c 100644 --- a/stubs/monitor-internal.c +++ b/stubs/monitor-internal.c @@ -10,4 +10,5 @@ int monitor_get_fd(Monitor *mon, const char *name, Error **errp) void monitor_new_hmp(const char *chardev_id, bool use_readline, Error **errp) { + g_assert_not_reached(); } diff --git a/system/vl.c b/system/vl.c index fb36140aac..79ed2be449 100644 --- a/system/vl.c +++ b/system/vl.c @@ -1830,6 +1830,10 @@ static void object_option_add_visitor(Visitor *v) { ObjectOption *opt = g_new0(ObjectOption, 1); visit_type_ObjectOptions(v, NULL, &opt->opts, &error_fatal); + if (opt->opts->qom_type == OBJECT_TYPE_MONITOR_HMP || + opt->opts->qom_type == OBJECT_TYPE_MONITOR_QMP) { + default_monitor = 0; + } QTAILQ_INSERT_TAIL(&object_opts, opt, next); } @@ -1971,7 +1975,9 @@ static bool object_create_early(const char *type) /* Reason: property "chardev" */ if (g_str_equal(type, "rng-egd") || - g_str_equal(type, "qtest")) { + g_str_equal(type, "qtest") || + g_str_equal(type, "monitor-hmp") || + g_str_equal(type, "monitor-qmp")) { return false; } -- 2.54.0