Currently qemu use the last keyboard device that added,
When removing keyboard (via device_del kbd) you get segfault next time
you try to write in the client.
i.e. start qemu
x86_64-softmmu/qemu-system-x86_64 -usb -device usb-kbd,id=kbd
switch to monitor
device_del kbd
switch back to client, segfault
This patch fix the segfault and add list of all the keyboard handle much
like the mouse device does.
Signed-off-by: Shahar Havivi <shah...@redhat.com>
---
console.h | 9 +++++-
hw/usb-hid.c | 9 ++++--
input.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++-----
3 files changed, 88 insertions(+), 11 deletions(-)
diff --git a/console.h b/console.h
index 71e8ff2..e250008 100644
--- a/console.h
+++ b/console.h
@@ -38,7 +38,14 @@ typedef struct QEMUPutLEDEntry {
QTAILQ_ENTRY(QEMUPutLEDEntry) next;
} QEMUPutLEDEntry;
-void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque);
+typedef struct QEMUPutKbdEntry {
+ QEMUPutKBDEvent *qemu_put_kbd_event;
+ void *qemu_put_kbd_event_opaque;
+ struct QEMUPutKbdEntry *next;
+} QEMUPutKbdEntry;
+
+QEMUPutKbdEntry *qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void
*opaque);
+void qemu_remove_kbd_event_handler(QEMUPutKbdEntry *entry);
QEMUPutMouseEntry *qemu_add_mouse_event_handler(QEMUPutMouseEvent *func,
void *opaque, int absolute,
const char *name);
diff --git a/hw/usb-hid.c b/hw/usb-hid.c
index 2e4e647..1dd0cc9 100644
--- a/hw/usb-hid.c
+++ b/hw/usb-hid.c
@@ -55,6 +55,7 @@ typedef struct USBKeyboardState {
uint8_t leds;
uint8_t key[16];
int keys;
+ QEMUPutKbdEntry *eh_entry;
} USBKeyboardState;
typedef struct USBHIDState {
@@ -635,7 +636,7 @@ static void usb_keyboard_handle_reset(USBDevice *dev)
{
USBHIDState *s = (USBHIDState *)dev;
- qemu_add_kbd_event_handler(usb_keyboard_event, s);
+ s->kbd.eh_entry = qemu_add_kbd_event_handler(usb_keyboard_event, s);
s->protocol = 1;
}
@@ -856,9 +857,11 @@ static void usb_hid_handle_destroy(USBDevice *dev)
{
USBHIDState *s = (USBHIDState *)dev;
- if (s->kind != USB_KEYBOARD)
+ if (s->kind != USB_KEYBOARD) {
qemu_remove_mouse_event_handler(s->ptr.eh_entry);
- /* TODO: else */
+ } else {
+ qemu_remove_kbd_event_handler(s->kbd.eh_entry);
+ }
}
static int usb_hid_initfn(USBDevice *dev, int kind)
diff --git a/input.c b/input.c
index baaa4c6..90b6cfb 100644
--- a/input.c
+++ b/input.c
@@ -29,16 +29,82 @@
#include "qjson.h"
-static QEMUPutKBDEvent *qemu_put_kbd_event;
-static void *qemu_put_kbd_event_opaque;
+static QEMUPutKbdEntry *qemu_put_kbd_event_head;
+static QEMUPutKbdEntry *qemu_put_kbd_event_current;
static QEMUPutMouseEntry *qemu_put_mouse_event_head;
static QEMUPutMouseEntry *qemu_put_mouse_event_current;
static QTAILQ_HEAD(, QEMUPutLEDEntry) led_handlers =
QTAILQ_HEAD_INITIALIZER(led_handlers);
-void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque)
+QEMUPutKbdEntry *qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void
*opaque)
{
- qemu_put_kbd_event_opaque = opaque;
- qemu_put_kbd_event = func;
+ QEMUPutKbdEntry *s, *cursor;
+
+ cursor = qemu_put_kbd_event_head;
+ while (cursor) {
+ if (cursor->qemu_put_kbd_event == func &&
+ cursor->qemu_put_kbd_event_opaque == opaque) {
+
+ qemu_put_kbd_event_current = cursor;
+ return cursor;
+ }
+ cursor = cursor->next;
+ }
+
+ s = qemu_mallocz(sizeof(QEMUPutKbdEntry));
+
+ s->qemu_put_kbd_event_opaque = opaque;
+ s->qemu_put_kbd_event = func;
+ s->next = NULL;
+
+ if (!qemu_put_kbd_event_head) {
+ qemu_put_kbd_event_head = s;
+ qemu_put_kbd_event_current = s;
+ return s;
+ }
+
+ cursor = qemu_put_kbd_event_head;
+ while (cursor->next) {
+ cursor = cursor->next;
+ }
+
+ cursor->next = s;
+ qemu_put_kbd_event_current = s;
+
+ return s;
+}
+
+void qemu_remove_kbd_event_handler(QEMUPutKbdEntry *entry)
+{
+ QEMUPutKbdEntry *prev = NULL, *cursor;
+
+ if (!qemu_put_kbd_event_head || !entry) {
+ return;
+ }
+
+ cursor = qemu_put_kbd_event_head;
+ while (cursor && cursor != entry) {
+ prev = cursor;
+ cursor = cursor->next;
+ }
+
+ if (cursor == NULL) {
+ return;
+ } else if (prev == NULL) {
+ qemu_put_kbd_event_head = cursor->next;
+ if (qemu_put_kbd_event_current == entry) {
+ qemu_put_kbd_event_current = cursor->next;
+ }
+ qemu_free(entry);
+ return;
+ }
+
+ prev->next = entry->next;
+
+ if (qemu_put_kbd_event_current == entry) {
+ qemu_put_kbd_event_current = prev;
+ }
+
+ qemu_free(entry);
}
QEMUPutMouseEntry *qemu_add_mouse_event_handler(QEMUPutMouseEvent *func,
@@ -126,8 +192,9 @@ void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry)
void kbd_put_keycode(int keycode)
{
- if (qemu_put_kbd_event) {
- qemu_put_kbd_event(qemu_put_kbd_event_opaque, keycode);
+ if (qemu_put_kbd_event_current) {
+ qemu_put_kbd_event_current->qemu_put_kbd_event(
+ qemu_put_kbd_event_current->qemu_put_kbd_event_opaque, keycode);
}
}
--
1.6.3.3
