monitor: deprecate 'default' option

This option does nothing since commit 06ac27f.  Deprecate it.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

include/monitor/monitor.h

@@ -9,7 +9,7 @@
 extern Monitor *cur_mon;
 
 /* flags for monitor_init */
-#define MONITOR_IS_DEFAULT    0x01
+/* 0x01 unused */
 #define MONITOR_USE_READLINE  0x02
 #define MONITOR_USE_CONTROL   0x04
 #define MONITOR_USE_PRETTY    0x08

monitor.c

@@ -4094,7 +4094,7 @@ QemuOptsList qemu_mon_opts = {
             .name = "chardev",
             .type = QEMU_OPT_STRING,
         },{
-            .name = "default",
+            .name = "default",  /* deprecated */
             .type = QEMU_OPT_BOOL,
         },{
             .name = "pretty",

qemu-options.hx

@@ -2239,7 +2239,7 @@ two serial ports and the QEMU monitor:
 
 @example
 -chardev stdio,mux=on,id=char0 \
--mon chardev=char0,mode=readline,default \
+-mon chardev=char0,mode=readline \
 -serial chardev:char0 \
 -serial chardev:char0
 @end example
@@ -2250,7 +2250,7 @@ multiplexed between the QEMU monitor and a parallel port:
 
 @example
 -chardev stdio,mux=on,id=char0 \
--mon chardev=char0,mode=readline,default \
+-mon chardev=char0,mode=readline \
 -parallel chardev:char0 \
 -chardev tcp,...,mux=on,id=char1 \
 -serial chardev:char1 \
@@ -3112,9 +3112,9 @@ Like -qmp but uses pretty JSON formatting.
 ETEXI
 
 DEF("mon", HAS_ARG, QEMU_OPTION_mon, \
-    "-mon [chardev=]name[,mode=readline|control][,default]\n", QEMU_ARCH_ALL)
+    "-mon [chardev=]name[,mode=readline|control]\n", QEMU_ARCH_ALL)
 STEXI
-@item -mon [chardev=]name[,mode=readline|control][,default]
+@item -mon [chardev=]name[,mode=readline|control]
 @findex -mon
 Setup monitor on chardev @var{name}.
 ETEXI

vl.c

@@ -2408,8 +2408,9 @@ static int mon_init_func(void *opaque, QemuOpts *opts, Error **errp)
     if (qemu_opt_get_bool(opts, "pretty", 0))
         flags |= MONITOR_USE_PRETTY;
 
-    if (qemu_opt_get_bool(opts, "default", 0))
-        flags |= MONITOR_IS_DEFAULT;
+    if (qemu_opt_get_bool(opts, "default", 0)) {
+        error_report("option 'default' does nothing and is deprecated");
+    }
 
     chardev = qemu_opt_get(opts, "chardev");
     chr = qemu_chr_find(chardev);
@@ -2428,16 +2429,12 @@ static void monitor_parse(const char *optarg, const char *mode, bool pretty)
     QemuOpts *opts;
     const char *p;
     char label[32];
-    int def = 0;
 
     if (strstart(optarg, "chardev:", &p)) {
         snprintf(label, sizeof(label), "%s", p);
     } else {
         snprintf(label, sizeof(label), "compat_monitor%d",
                  monitor_device_index);
-        if (monitor_device_index == 0) {
-            def = 1;
-        }
         opts = qemu_chr_parse_compat(label, optarg);
         if (!opts) {
             error_report("parse error: %s", optarg);
@@ -2449,8 +2446,6 @@ static void monitor_parse(const char *optarg, const char *mode, bool pretty)
     qemu_opt_set(opts, "mode", mode, &error_abort);
     qemu_opt_set(opts, "chardev", label, &error_abort);
     qemu_opt_set_bool(opts, "pretty", pretty, &error_abort);
-    if (def)
-        qemu_opt_set(opts, "default", "on", &error_abort);
     monitor_device_index++;
 }