monitor: Replace monitor_init() with monitor_init_{hmp, qmp}()

Most callers know which monitor type they want to have. Instead of
calling monitor_init() with flags that can describe both types of
monitors, make monitor_init_{hmp,qmp}() public interfaces that take
specific bools instead of flags and call these functions directly.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20190613153405.24769-15-kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

chardev/char.c

@@ -731,7 +731,7 @@ Chardev *qemu_chr_new_noreplay(const char *label, const char *filename,
 
     if (qemu_opt_get_bool(opts, "mux", 0)) {
         assert(permit_mux_mon);
-        monitor_init(chr, MONITOR_USE_READLINE);
+        monitor_init_hmp(chr, true);
     }
 
 out:

gdbstub.c

@@ -3344,7 +3344,7 @@ int gdbserver_start(const char *device)
         /* Initialize a monitor terminal for gdb */
         mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB,
                                    NULL, NULL, &error_abort);
-        monitor_init(mon_chr, 0);
+        monitor_init_hmp(mon_chr, false);
     } else {
         qemu_chr_fe_deinit(&s->chr, true);
         mon_chr = s->mon_chr;

include/monitor/monitor.h

@@ -8,19 +8,14 @@
 extern __thread Monitor *cur_mon;
 typedef struct MonitorHMP MonitorHMP;
 
-/* flags for monitor_init */
-/* 0x01 unused */
-#define MONITOR_USE_READLINE  0x02
-#define MONITOR_USE_CONTROL   0x04
-#define MONITOR_USE_PRETTY    0x08
-
 #define QMP_REQ_QUEUE_LEN_MAX 8
 
 bool monitor_cur_is_qmp(void);
 
 void monitor_init_globals(void);
 void monitor_init_globals_core(void);
-void monitor_init(Chardev *chr, int flags);
+void monitor_init_qmp(Chardev *chr, bool pretty);
+void monitor_init_hmp(Chardev *chr, bool use_readline);
 void monitor_cleanup(void);
 
 int monitor_suspend(Monitor *mon);

monitor/hmp.c

@@ -1395,14 +1395,14 @@ static void monitor_readline_flush(void *opaque)
     monitor_flush(&mon->common);
 }
 
-void monitor_init_hmp(Chardev *chr, int flags)
+void monitor_init_hmp(Chardev *chr, bool use_readline)
 {
     MonitorHMP *mon = g_new0(MonitorHMP, 1);
 
     monitor_data_init(&mon->common, false, false, false);
     qemu_chr_fe_init(&mon->common.chr, chr, &error_abort);
 
-    mon->use_readline = flags & MONITOR_USE_READLINE;
+    mon->use_readline = use_readline;
     if (mon->use_readline) {
         mon->rs = readline_init(monitor_readline_printf,
                                 monitor_readline_flush,

monitor/monitor-internal.h

@@ -163,9 +163,6 @@ extern int mon_refcount;
 
 extern HMPCommand hmp_cmds[];
 
-void monitor_init_qmp(Chardev *chr, int flags);
-void monitor_init_hmp(Chardev *chr, int flags);
-
 int monitor_puts(Monitor *mon, const char *str);
 void monitor_data_init(Monitor *mon, bool is_qmp, bool skip_flush,
                        bool use_io_thread);

monitor/monitor.c

@@ -551,15 +551,6 @@ void monitor_data_destroy(Monitor *mon)
     qemu_mutex_destroy(&mon->mon_lock);
 }
 
-void monitor_init(Chardev *chr, int flags)
-{
-    if (flags & MONITOR_USE_CONTROL) {
-        monitor_init_qmp(chr, flags);
-    } else {
-        monitor_init_hmp(chr, flags);
-    }
-}
-
 void monitor_cleanup(void)
 {
     /*

monitor/qmp.c

@@ -364,18 +364,15 @@ static void monitor_qmp_setup_handlers_bh(void *opaque)
     monitor_list_append(&mon->common);
 }
 
-void monitor_init_qmp(Chardev *chr, int flags)
+void monitor_init_qmp(Chardev *chr, bool pretty)
 {
     MonitorQMP *mon = g_new0(MonitorQMP, 1);
 
-    /* Only HMP supports readline */
-    assert(!(flags & MONITOR_USE_READLINE));
-
     /* Note: we run QMP monitor in I/O thread when @chr supports that */
     monitor_data_init(&mon->common, true, false,
                       qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_GCONTEXT));
 
-    mon->pretty = flags & MONITOR_USE_PRETTY;
+    mon->pretty = pretty;
 
     qemu_mutex_init(&mon->qmp_queue_lock);
     mon->qmp_requests = g_queue_new();

stubs/monitor.c

@@ -16,7 +16,11 @@ int monitor_get_fd(Monitor *mon, const char *name, Error **errp)
     return -1;
 }
 
-void monitor_init(Chardev *chr, int flags)
+void monitor_init_qmp(Chardev *chr, bool pretty)
+{
+}
+
+void monitor_init_hmp(Chardev *chr, bool use_readline)
 {
 }
 

tests/test-util-sockets.c

@@ -71,7 +71,8 @@ int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp)
  */
 __thread Monitor *cur_mon;
 int monitor_vprintf(Monitor *mon, const char *fmt, va_list ap) { abort(); }
-void monitor_init(Chardev *chr, int flags) {}
+void monitor_init_qmp(Chardev *chr, bool pretty) {}
+void monitor_init_hmp(Chardev *chr, bool use_readline) {}
 
 
 static void test_socket_fd_pass_name_good(void)

vl.c

@@ -2299,25 +2299,27 @@ static int fsdev_init_func(void *opaque, QemuOpts *opts, Error **errp)
 static int mon_init_func(void *opaque, QemuOpts *opts, Error **errp)
 {
     Chardev *chr;
+    bool qmp;
+    bool pretty = false;
     const char *chardev;
     const char *mode;
-    int flags;
 
     mode = qemu_opt_get(opts, "mode");
     if (mode == NULL) {
         mode = "readline";
     }
     if (strcmp(mode, "readline") == 0) {
-        flags = MONITOR_USE_READLINE;
+        qmp = false;
     } else if (strcmp(mode, "control") == 0) {
-        flags = MONITOR_USE_CONTROL;
+        qmp = true;
     } else {
         error_setg(errp, "unknown monitor mode \"%s\"", mode);
         return -1;
     }
 
-    if (qemu_opt_get_bool(opts, "pretty", 0))
-        flags |= MONITOR_USE_PRETTY;
+    if (qemu_opt_get_bool(opts, "pretty", 0)) {
+        pretty = true;
+    }
 
     chardev = qemu_opt_get(opts, "chardev");
     if (!chardev) {
@@ -2330,7 +2332,11 @@ static int mon_init_func(void *opaque, QemuOpts *opts, Error **errp)
         return -1;
     }
 
-    monitor_init(chr, flags);
+    if (qmp) {
+        monitor_init_qmp(chr, pretty);
+    } else {
+        monitor_init_hmp(chr, true);
+    }
     return 0;
 }