From 86e94dea5b740dad65446c857f6959eae43e0ba6 Mon Sep 17 00:00:00 2001
From: ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Fri, 5 Jan 2007 22:01:59 +0000
Subject: [PATCH] Reinitialize monitor upon reconnect, by Anthony Liguori.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2300 c046a42c-6fe2-441c-8c8c-71466251a162
---
 console.c |  2 ++
 monitor.c | 20 +++++++++++++++-----
 vl.c      | 28 ++++++++++++++++++++++++++++
 vl.h      |  7 +++++--
 4 files changed, 50 insertions(+), 7 deletions(-)

diff --git a/console.c b/console.c
index f039dfcb39..cd30235b35 100644
--- a/console.c
+++ b/console.c
@@ -1086,5 +1086,7 @@ CharDriverState *text_console_init(DisplayState *ds)
     s->t_attrib = s->t_attrib_default;
     text_console_resize(s);
 
+    qemu_chr_reset(chr);
+
     return chr;
 }
diff --git a/monitor.c b/monitor.c
index da9b49239c..6cb1c38fb7 100644
--- a/monitor.c
+++ b/monitor.c
@@ -55,6 +55,7 @@ typedef struct term_cmd_t {
 } term_cmd_t;
 
 static CharDriverState *monitor_hd;
+static int hide_banner;
 
 static term_cmd_t term_cmds[];
 static term_cmd_t info_cmds[];
@@ -2438,15 +2439,24 @@ static void monitor_start_input(void)
     readline_start("(qemu) ", 0, monitor_handle_command1, NULL);
 }
 
+static void term_event(void *opaque, int event)
+{
+    if (event != CHR_EVENT_RESET)
+	return;
+
+    if (!hide_banner)
+	    term_printf("QEMU %s monitor - type 'help' for more information\n",
+			QEMU_VERSION);
+    monitor_start_input();
+}
+
 void monitor_init(CharDriverState *hd, int show_banner)
 {
     monitor_hd = hd;
-    if (show_banner) {
-        term_printf("QEMU %s monitor - type 'help' for more information\n",
-                    QEMU_VERSION);
-    }
+    hide_banner = !show_banner;
+
     qemu_chr_add_read_handler(hd, term_can_read, term_read, NULL);
-    monitor_start_input();
+    qemu_chr_add_event_handler(hd, term_event);
 }
 
 /* XXX: use threads ? */
diff --git a/vl.c b/vl.c
index 7b3d880b47..e5399c7308 100644
--- a/vl.c
+++ b/vl.c
@@ -1165,6 +1165,23 @@ void quit_timers(void)
 /***********************************************************/
 /* character device */
 
+static void qemu_chr_reset_bh(void *opaque)
+{
+    CharDriverState *s = opaque;
+    if (s->chr_event)
+	s->chr_event(s, CHR_EVENT_RESET);
+    qemu_bh_delete(s->bh);
+    s->bh = NULL;
+}
+
+void qemu_chr_reset(CharDriverState *s)
+{
+    if (s->bh == NULL) {
+	s->bh = qemu_bh_new(qemu_chr_reset_bh, s);
+	qemu_bh_schedule(s->bh);
+    }
+}
+
 int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
 {
     return s->chr_write(s, buf, len);
@@ -1402,6 +1419,9 @@ static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
     chr->opaque = s;
     chr->chr_write = fd_chr_write;
     chr->chr_add_read_handler = fd_chr_add_read_handler;
+
+    qemu_chr_reset(chr);
+
     return chr;
 }
 
@@ -1819,6 +1839,7 @@ static CharDriverState *qemu_chr_open_tty(const char *filename)
     if (!chr)
         return NULL;
     chr->chr_ioctl = tty_serial_ioctl;
+    qemu_chr_reset(chr);
     return chr;
 }
 
@@ -1882,6 +1903,9 @@ static CharDriverState *qemu_chr_open_pp(const char *filename)
     chr->chr_write = null_chr_write;
     chr->chr_add_read_handler = null_chr_add_read_handler;
     chr->chr_ioctl = pp_ioctl;
+
+    qemu_chr_reset(chr);
+
     return chr;
 }
 
@@ -2127,6 +2151,7 @@ static CharDriverState *qemu_chr_open_win(const char *filename)
         free(chr);
         return NULL;
     }
+    qemu_chr_reset(chr);
     return chr;
 }
 
@@ -2230,6 +2255,7 @@ static CharDriverState *qemu_chr_open_win_pipe(const char *filename)
         free(chr);
         return NULL;
     }
+    qemu_chr_reset(chr);
     return chr;
 }
 
@@ -2250,6 +2276,7 @@ static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
     chr->opaque = s;
     chr->chr_write = win_chr_write;
     chr->chr_add_read_handler = win_chr_add_read_handler;
+    qemu_chr_reset(chr);
     return chr;
 }
     
@@ -2537,6 +2564,7 @@ static void tcp_chr_connect(void *opaque)
     s->connected = 1;
     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
                          tcp_chr_read, NULL, chr);
+    qemu_chr_reset(chr);
 }
 
 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
diff --git a/vl.h b/vl.h
index 1c584063e2..8eef56de33 100644
--- a/vl.h
+++ b/vl.h
@@ -260,11 +260,13 @@ int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque);
 void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque);
 #endif
 
+typedef struct QEMUBH QEMUBH;
+
 /* character device */
 
 #define CHR_EVENT_BREAK 0 /* serial break char */
 #define CHR_EVENT_FOCUS 1 /* focus to this terminal (modal input needed) */
-
+#define CHR_EVENT_RESET 2 /* new connection established */
 
 
 #define CHR_IOCTL_SERIAL_SET_PARAMS   1
@@ -295,6 +297,7 @@ typedef struct CharDriverState {
     void (*chr_send_event)(struct CharDriverState *chr, int event);
     void (*chr_close)(struct CharDriverState *chr);
     void *opaque;
+    QEMUBH *bh;
 } CharDriverState;
 
 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...);
@@ -305,6 +308,7 @@ void qemu_chr_add_read_handler(CharDriverState *s,
                                IOReadHandler *fd_read, void *opaque);
 void qemu_chr_add_event_handler(CharDriverState *s, IOEventHandler *chr_event);
 int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg);
+void qemu_chr_reset(CharDriverState *s);
 
 /* consoles */
 
@@ -513,7 +517,6 @@ void do_delvm(const char *name);
 void do_info_snapshots(void);
 
 /* bottom halves */
-typedef struct QEMUBH QEMUBH;
 typedef void QEMUBHFunc(void *opaque);
 
 QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque);