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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/2 v3] xenfb: Use Input Handlers directly
Anthony,
The code looks good. I tested this patch with Linux guests and seems to
work OK, can you also confirm?
One comment below.
On Wed, 26 Jul 2017, Owen Smith wrote:
> Avoid the unneccessary calls through the input-legacy.c file by
> using the qemu_input_handler_*() calls directly. This did require
> reworking the event and sync handlers and a direct mapping from
> QEMU's qcodes to linux KEY_* identifiers required by the ring
> protocol. Removes the scancode2linux mapping, and supporting
> documention.
>
> Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>
> ---
> hw/display/xenfb.c | 401
> +++++++++++++++++++++++++++++++++--------------------
> 1 file changed, 247 insertions(+), 154 deletions(-)
>
> diff --git a/hw/display/xenfb.c b/hw/display/xenfb.c
> index df8b78f..e412753 100644
> --- a/hw/display/xenfb.c
> +++ b/hw/display/xenfb.c
> @@ -27,6 +27,7 @@
> #include "qemu/osdep.h"
>
> #include "hw/hw.h"
> +#include "ui/input.h"
> #include "ui/console.h"
> #include "hw/xen/xen_backend.h"
>
> @@ -37,9 +38,7 @@
>
> #include "trace.h"
>
> -#ifndef BTN_LEFT
> -#define BTN_LEFT 0x110 /* from <linux/input.h> */
> -#endif
> +#include "standard-headers/linux/input.h"
>
> /* -------------------------------------------------------------------- */
>
> @@ -51,9 +50,10 @@ struct common {
> struct XenInput {
> struct common c;
> int abs_pointer_wanted; /* Whether guest supports absolute pointer */
> - int button_state; /* Last seen pointer button state */
> - int extended;
> - QEMUPutMouseEntry *qmouse;
> + QemuInputHandlerState *qkbd;
> + QemuInputHandlerState *qmou;
> + int mouse_axes[INPUT_AXIS__MAX];
> + int mouse_wheel;
> };
>
> #define UP_QUEUE 8
> @@ -120,77 +120,125 @@ static void common_unbind(struct common *c)
>
> /* -------------------------------------------------------------------- */
>
> -#if 0
> -/*
> - * These two tables are not needed any more, but left in here
> - * intentionally as documentation, to show how scancode2linux[]
> - * was generated.
> - *
> - * Tables to map from scancode to Linux input layer keycode.
> - * Scancodes are hardware-specific. These maps assumes a
> - * standard AT or PS/2 keyboard which is what QEMU feeds us.
> - */
> -const unsigned char atkbd_set2_keycode[512] = {
> -
> - 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
> - 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
> - 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
> - 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
> - 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
> - 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
> - 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
> - 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
> -
> - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> - 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
> - 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
> - 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
> - 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
> - 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
> - 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
> - 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
> -
> -};
> -
> -const unsigned char atkbd_unxlate_table[128] = {
> -
> - 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
> - 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
> - 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
> - 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
> - 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
> - 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
> - 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
> - 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
> -
> +static const unsigned int keymap_qcode[Q_KEY_CODE__MAX] = {
> + [Q_KEY_CODE_ESC] = KEY_ESC,
> + [Q_KEY_CODE_1] = KEY_1,
> + [Q_KEY_CODE_2] = KEY_2,
> + [Q_KEY_CODE_3] = KEY_3,
> + [Q_KEY_CODE_4] = KEY_4,
> + [Q_KEY_CODE_5] = KEY_5,
> + [Q_KEY_CODE_6] = KEY_6,
> + [Q_KEY_CODE_7] = KEY_7,
> + [Q_KEY_CODE_8] = KEY_8,
> + [Q_KEY_CODE_9] = KEY_9,
> + [Q_KEY_CODE_0] = KEY_0,
> + [Q_KEY_CODE_MINUS] = KEY_MINUS,
> + [Q_KEY_CODE_EQUAL] = KEY_EQUAL,
> + [Q_KEY_CODE_BACKSPACE] = KEY_BACKSPACE,
> +
> + [Q_KEY_CODE_TAB] = KEY_TAB,
> + [Q_KEY_CODE_Q] = KEY_Q,
> + [Q_KEY_CODE_W] = KEY_W,
> + [Q_KEY_CODE_E] = KEY_E,
> + [Q_KEY_CODE_R] = KEY_R,
> + [Q_KEY_CODE_T] = KEY_T,
> + [Q_KEY_CODE_Y] = KEY_Y,
> + [Q_KEY_CODE_U] = KEY_U,
> + [Q_KEY_CODE_I] = KEY_I,
> + [Q_KEY_CODE_O] = KEY_O,
> + [Q_KEY_CODE_P] = KEY_P,
> + [Q_KEY_CODE_BRACKET_LEFT] = KEY_LEFTBRACE,
> + [Q_KEY_CODE_BRACKET_RIGHT] = KEY_RIGHTBRACE,
> + [Q_KEY_CODE_RET] = KEY_ENTER,
> +
> + [Q_KEY_CODE_CTRL] = KEY_LEFTCTRL,
> + [Q_KEY_CODE_A] = KEY_A,
> + [Q_KEY_CODE_S] = KEY_S,
> + [Q_KEY_CODE_D] = KEY_D,
> + [Q_KEY_CODE_F] = KEY_F,
> + [Q_KEY_CODE_G] = KEY_G,
> + [Q_KEY_CODE_H] = KEY_H,
> + [Q_KEY_CODE_J] = KEY_J,
> + [Q_KEY_CODE_K] = KEY_K,
> + [Q_KEY_CODE_L] = KEY_L,
> + [Q_KEY_CODE_SEMICOLON] = KEY_SEMICOLON,
> + [Q_KEY_CODE_APOSTROPHE] = KEY_APOSTROPHE,
> + [Q_KEY_CODE_GRAVE_ACCENT] = KEY_GRAVE,
> +
> + [Q_KEY_CODE_SHIFT] = KEY_LEFTSHIFT,
> + [Q_KEY_CODE_BACKSLASH] = KEY_BACKSLASH,
> + [Q_KEY_CODE_LESS] = KEY_102ND,
> + [Q_KEY_CODE_Z] = KEY_Z,
> + [Q_KEY_CODE_X] = KEY_X,
> + [Q_KEY_CODE_C] = KEY_C,
> + [Q_KEY_CODE_V] = KEY_V,
> + [Q_KEY_CODE_B] = KEY_B,
> + [Q_KEY_CODE_N] = KEY_N,
> + [Q_KEY_CODE_M] = KEY_M,
> + [Q_KEY_CODE_COMMA] = KEY_COMMA,
> + [Q_KEY_CODE_DOT] = KEY_DOT,
> + [Q_KEY_CODE_SLASH] = KEY_SLASH,
> + [Q_KEY_CODE_SHIFT_R] = KEY_RIGHTSHIFT,
> +
> + [Q_KEY_CODE_ALT] = KEY_LEFTALT,
> + [Q_KEY_CODE_SPC] = KEY_SPACE,
> + [Q_KEY_CODE_CAPS_LOCK] = KEY_CAPSLOCK,
> +
> + [Q_KEY_CODE_F1] = KEY_F1,
> + [Q_KEY_CODE_F2] = KEY_F2,
> + [Q_KEY_CODE_F3] = KEY_F3,
> + [Q_KEY_CODE_F4] = KEY_F4,
> + [Q_KEY_CODE_F5] = KEY_F5,
> + [Q_KEY_CODE_F6] = KEY_F6,
> + [Q_KEY_CODE_F7] = KEY_F7,
> + [Q_KEY_CODE_F8] = KEY_F8,
> + [Q_KEY_CODE_F9] = KEY_F9,
> + [Q_KEY_CODE_F10] = KEY_F10,
> + [Q_KEY_CODE_NUM_LOCK] = KEY_NUMLOCK,
> + [Q_KEY_CODE_SCROLL_LOCK] = KEY_SCROLLLOCK,
> +
> + [Q_KEY_CODE_KP_0] = KEY_KP0,
> + [Q_KEY_CODE_KP_1] = KEY_KP1,
> + [Q_KEY_CODE_KP_2] = KEY_KP2,
> + [Q_KEY_CODE_KP_3] = KEY_KP3,
> + [Q_KEY_CODE_KP_4] = KEY_KP4,
> + [Q_KEY_CODE_KP_5] = KEY_KP5,
> + [Q_KEY_CODE_KP_6] = KEY_KP6,
> + [Q_KEY_CODE_KP_7] = KEY_KP7,
> + [Q_KEY_CODE_KP_8] = KEY_KP8,
> + [Q_KEY_CODE_KP_9] = KEY_KP9,
> + [Q_KEY_CODE_KP_SUBTRACT] = KEY_KPMINUS,
> + [Q_KEY_CODE_KP_ADD] = KEY_KPPLUS,
> + [Q_KEY_CODE_KP_DECIMAL] = KEY_KPDOT,
> + [Q_KEY_CODE_KP_ENTER] = KEY_KPENTER,
> + [Q_KEY_CODE_KP_DIVIDE] = KEY_KPSLASH,
> + [Q_KEY_CODE_KP_MULTIPLY] = KEY_KPASTERISK,
> +
> + [Q_KEY_CODE_F11] = KEY_F11,
> + [Q_KEY_CODE_F12] = KEY_F12,
> +
> + [Q_KEY_CODE_CTRL_R] = KEY_RIGHTCTRL,
> + [Q_KEY_CODE_SYSRQ] = KEY_SYSRQ,
> + [Q_KEY_CODE_PRINT] = KEY_SYSRQ,
I take that KEY_PRINT is not supported by the protocol?
> + [Q_KEY_CODE_PAUSE] = KEY_PAUSE,
> + [Q_KEY_CODE_ALT_R] = KEY_RIGHTALT,
> +
> + [Q_KEY_CODE_HOME] = KEY_HOME,
> + [Q_KEY_CODE_UP] = KEY_UP,
> + [Q_KEY_CODE_PGUP] = KEY_PAGEUP,
> + [Q_KEY_CODE_LEFT] = KEY_LEFT,
> + [Q_KEY_CODE_RIGHT] = KEY_RIGHT,
> + [Q_KEY_CODE_END] = KEY_END,
> + [Q_KEY_CODE_DOWN] = KEY_DOWN,
> + [Q_KEY_CODE_PGDN] = KEY_PAGEDOWN,
> + [Q_KEY_CODE_INSERT] = KEY_INSERT,
> + [Q_KEY_CODE_DELETE] = KEY_DELETE,
> +
> + [Q_KEY_CODE_META_L] = KEY_LEFTMETA,
> + [Q_KEY_CODE_META_R] = KEY_RIGHTMETA,
> + [Q_KEY_CODE_MENU] = KEY_MENU,
> };
> -#endif
>
> -/*
> - * for (i = 0; i < 128; i++) {
> - * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
> - * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i]
> | 0x80];
> - * }
> - */
> -static const unsigned char scancode2linux[512] = {
> - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
> - 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
> - 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
> - 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
> - 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
> - 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
> - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> - 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
> -
> - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> - 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
> - 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
> - 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
> - 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
> - 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
> - 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
> - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> -};
>
> /* Send an event to the keyboard frontend driver */
> static int xenfb_kbd_event(struct XenInput *xenfb,
> @@ -260,87 +308,123 @@ static int xenfb_send_position(struct XenInput *xenfb,
> return xenfb_kbd_event(xenfb, &event);
> }
>
> -/*
> - * Send a key event from the client to the guest OS
> - * QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
> - * We have to turn this into a Linux Input layer keycode.
> - *
> - * Extra complexity from the fact that with extended scancodes
> - * (like those produced by arrow keys) this method gets called
> - * twice, but we only want to send a single event. So we have to
> - * track the '0xe0' scancode state & collapse the extended keys
> - * as needed.
> - *
> - * Wish we could just send scancodes straight to the guest which
> - * already has code for dealing with this...
> - */
> -static void xenfb_key_event(void *opaque, int scancode)
> +static void xenfb_key_event(DeviceState *dev, QemuConsole *src,
> + InputEvent *evt)
> {
> - struct XenInput *xenfb = opaque;
> - int down = 1;
> + struct XenInput *in = (struct XenInput *)dev;
> + InputKeyEvent *key = evt->u.key.data;
> + int qcode = qemu_input_key_value_to_qcode(key->key);
>
> - if (scancode == 0xe0) {
> - xenfb->extended = 1;
> - return;
> - } else if (scancode & 0x80) {
> - scancode &= 0x7f;
> - down = 0;
> + if (qcode && keymap_qcode[qcode]) {
> + xenfb_send_key(in, key->down, keymap_qcode[qcode]);
> }
> - if (xenfb->extended) {
> - scancode |= 0x80;
> - xenfb->extended = 0;
> +}
> +
> +static void xenfb_mouse_event(DeviceState *dev, QemuConsole *src,
> + InputEvent *evt)
> +{
> + struct XenInput *in = (struct XenInput *)dev;
> + InputBtnEvent *btn;
> + InputMoveEvent *move;
> +
> + switch (evt->type) {
> + case INPUT_EVENT_KIND_BTN:
> + btn = evt->u.btn.data;
> + switch (btn->button) {
> + case INPUT_BUTTON_LEFT:
> + xenfb_send_key(in, btn->down, BTN_LEFT);
> + break;
> + case INPUT_BUTTON_RIGHT:
> + xenfb_send_key(in, btn->down, BTN_RIGHT);
> + break;
> + case INPUT_BUTTON_MIDDLE:
> + xenfb_send_key(in, btn->down, BTN_MIDDLE);
> + break;
> + case INPUT_BUTTON_WHEEL_UP:
> + if (btn->down) {
> + in->mouse_wheel--;
> + }
> + break;
> + case INPUT_BUTTON_WHEEL_DOWN:
> + if (btn->down) {
> + in->mouse_wheel++;
> + }
> + break;
> + default:
> + break;
> + }
> + break;
> + case INPUT_EVENT_KIND_ABS:
> + move = evt->u.abs.data;
> + in->mouse_axes[move->axis] = move->value;
> + break;
> + case INPUT_EVENT_KIND_REL:
> + move = evt->u.rel.data;
> + in->mouse_axes[move->axis] += move->value;
> + break;
> + default:
> + break;
> }
> - xenfb_send_key(xenfb, down, scancode2linux[scancode]);
> }
>
> -/*
> - * Send a mouse event from the client to the guest OS
> - *
> - * The QEMU mouse can be in either relative, or absolute mode.
> - * Movement is sent separately from button state, which has to
> - * be encoded as virtual key events. We also don't actually get
> - * given any button up/down events, so have to track changes in
> - * the button state.
> - */
> -static void xenfb_mouse_event(void *opaque,
> - int dx, int dy, int dz, int button_state)
> +static void xenfb_mouse_sync(DeviceState *dev)
> {
> - struct XenInput *xenfb = opaque;
> - QemuConsole *con = qemu_console_lookup_by_index(0);
> - DisplaySurface *surface;
> - int dw, dh, i;
> + struct XenInput *in = (struct XenInput *)dev;
> + int dx, dy, dz;
>
> - if (!con) {
> - xen_pv_printf(&xenfb->c.xendev, 0, "No QEMU console available");
> - return;
> - }
> + dx = in->mouse_axes[INPUT_AXIS_X];
> + dy = in->mouse_axes[INPUT_AXIS_Y];
> + dz = in->mouse_wheel;
> +
> + trace_xenfb_mouse_event(in, dx, dy, dz, 0,
> + in->abs_pointer_wanted);
> +
> + if (in->abs_pointer_wanted) {
> + QemuConsole *con = qemu_console_lookup_by_index(0);
> + DisplaySurface *surface;
> + int dw, dh;
> +
> + if (!con) {
> + xen_pv_printf(&in->c.xendev, 0, "No QEMU console available");
> + return;
> + }
>
> - surface = qemu_console_surface(con);
> - dw = surface_width(surface);
> - dh = surface_height(surface);
> -
> - trace_xenfb_mouse_event(opaque, dx, dy, dz, button_state,
> - xenfb->abs_pointer_wanted);
> - if (xenfb->abs_pointer_wanted)
> - xenfb_send_position(xenfb,
> - dx * (dw - 1) / 0x7fff,
> - dy * (dh - 1) / 0x7fff,
> - dz);
> - else
> - xenfb_send_motion(xenfb, dx, dy, dz);
> -
> - for (i = 0 ; i < 8 ; i++) {
> - int lastDown = xenfb->button_state & (1 << i);
> - int down = button_state & (1 << i);
> - if (down == lastDown)
> - continue;
> -
> - if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0)
> - return;
> + surface = qemu_console_surface(con);
> + dw = surface_width(surface);
> + dh = surface_height(surface);
> +
> + dx = dx * (dw - 1) / 0x7fff;
> + dy = dy * (dh - 1) / 0x7fff;
> +
> + xenfb_send_position(in, dx, dy, dz);
> + } else {
> + xenfb_send_motion(in, dx, dy, dz);
> +
> + in->mouse_axes[INPUT_AXIS_X] = 0;
> + in->mouse_axes[INPUT_AXIS_Y] = 0;
> }
> - xenfb->button_state = button_state;
> +
> + in->mouse_wheel = 0;
> }
>
> +static QemuInputHandler xenfb_keyboard = {
> + .name = "Xen PVFB Keyboard",
> + .mask = INPUT_EVENT_MASK_KEY,
> + .event = xenfb_key_event,
> +};
> +static QemuInputHandler xenfb_abs_mouse = {
> + .name = "Xen PVFB Absolute Mouse",
> + .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
> + .event = xenfb_mouse_event,
> + .sync = xenfb_mouse_sync
> +};
> +static QemuInputHandler xenfb_rel_mouse = {
> + .name = "Xen PVFB Mouse",
> + .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
> + .event = xenfb_mouse_event,
> + .sync = xenfb_mouse_sync,
> +};
> +
> static int input_init(struct XenDevice *xendev)
> {
> xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
> @@ -356,7 +440,6 @@ static int input_initialise(struct XenDevice *xendev)
> if (rc != 0)
> return rc;
>
> - qemu_add_kbd_event_handler(xenfb_key_event, in);
> return 0;
> }
>
> @@ -369,24 +452,34 @@ static void input_connected(struct XenDevice *xendev)
> in->abs_pointer_wanted = 0;
> }
>
> - if (in->qmouse) {
> - qemu_remove_mouse_event_handler(in->qmouse);
> + if (in->qkbd) {
> + qemu_input_handler_unregister(in->qkbd);
> + }
> + if (in->qmou) {
> + qemu_input_handler_unregister(in->qmou);
> }
> trace_xenfb_input_connected(xendev, in->abs_pointer_wanted);
> - in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
> - in->abs_pointer_wanted,
> - "Xen PVFB Mouse");
> +
> + in->qkbd = qemu_input_handler_register((DeviceState *)in,
> &xenfb_keyboard);
> + in->qmou = qemu_input_handler_register((DeviceState *)in,
> + (in->abs_pointer_wanted ? &xenfb_abs_mouse : &xenfb_rel_mouse));
> +
> + qemu_input_handler_activate(in->qkbd);
> + qemu_input_handler_activate(in->qmou);
> }
>
> static void input_disconnect(struct XenDevice *xendev)
> {
> struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
>
> - if (in->qmouse) {
> - qemu_remove_mouse_event_handler(in->qmouse);
> - in->qmouse = NULL;
> + if (in->qkbd) {
> + qemu_input_handler_unregister(in->qkbd);
> + in->qkbd = NULL;
> + }
> + if (in->qmou) {
> + qemu_input_handler_unregister(in->qmou);
> + in->qmou = NULL;
> }
> - qemu_add_kbd_event_handler(NULL, NULL);
> common_unbind(&in->c);
> }
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