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xemu/ui/vdagent.c
Marc-André Lureau 90208bc965 ui/vdagent: add a migration blocker 
The current implementation lacks migration support. After migration,
vdagent support will be broken (even after a restart of the daemons).
Let's try to fix it in 6.2.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210805135715.857938-19-marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
2021-08-31 17:25:14 +04:00

872 lines
26 KiB
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#include "qemu/osdep.h"
#include "qapi/error.h"
#include "include/qemu-common.h"
#include "chardev/char.h"
#include "qemu/buffer.h"
#include "qemu/option.h"
#include "qemu/units.h"
#include "hw/qdev-core.h"
#include "migration/blocker.h"
#include "ui/clipboard.h"
#include "ui/console.h"
#include "ui/input.h"
#include "trace.h"
#include "qapi/qapi-types-char.h"
#include "qapi/qapi-types-ui.h"
#include "spice/vd_agent.h"
#define VDAGENT_BUFFER_LIMIT (1 * MiB)
#define VDAGENT_MOUSE_DEFAULT true
#define VDAGENT_CLIPBOARD_DEFAULT false
struct VDAgentChardev {
Chardev parent;
/* TODO: migration isn't yet supported */
Error *migration_blocker;
/* config */
bool mouse;
bool clipboard;
/* guest vdagent */
uint32_t caps;
VDIChunkHeader chunk;
uint32_t chunksize;
uint8_t *msgbuf;
uint32_t msgsize;
uint8_t *xbuf;
uint32_t xoff, xsize;
Buffer outbuf;
/* mouse */
DeviceState mouse_dev;
uint32_t mouse_x;
uint32_t mouse_y;
uint32_t mouse_btn;
uint32_t mouse_display;
QemuInputHandlerState *mouse_hs;
/* clipboard */
QemuClipboardPeer cbpeer;
uint32_t cbpending[QEMU_CLIPBOARD_SELECTION__COUNT];
};
typedef struct VDAgentChardev VDAgentChardev;
#define TYPE_CHARDEV_QEMU_VDAGENT "chardev-qemu-vdagent"
DECLARE_INSTANCE_CHECKER(VDAgentChardev, QEMU_VDAGENT_CHARDEV,
TYPE_CHARDEV_QEMU_VDAGENT);
/* ------------------------------------------------------------------ */
/* names, for debug logging */
static const char *cap_name[] = {
[VD_AGENT_CAP_MOUSE_STATE] = "mouse-state",
[VD_AGENT_CAP_MONITORS_CONFIG] = "monitors-config",
[VD_AGENT_CAP_REPLY] = "reply",
[VD_AGENT_CAP_CLIPBOARD] = "clipboard",
[VD_AGENT_CAP_DISPLAY_CONFIG] = "display-config",
[VD_AGENT_CAP_CLIPBOARD_BY_DEMAND] = "clipboard-by-demand",
[VD_AGENT_CAP_CLIPBOARD_SELECTION] = "clipboard-selection",
[VD_AGENT_CAP_SPARSE_MONITORS_CONFIG] = "sparse-monitors-config",
[VD_AGENT_CAP_GUEST_LINEEND_LF] = "guest-lineend-lf",
[VD_AGENT_CAP_GUEST_LINEEND_CRLF] = "guest-lineend-crlf",
[VD_AGENT_CAP_MAX_CLIPBOARD] = "max-clipboard",
[VD_AGENT_CAP_AUDIO_VOLUME_SYNC] = "audio-volume-sync",
[VD_AGENT_CAP_MONITORS_CONFIG_POSITION] = "monitors-config-position",
[VD_AGENT_CAP_FILE_XFER_DISABLED] = "file-xfer-disabled",
[VD_AGENT_CAP_FILE_XFER_DETAILED_ERRORS] = "file-xfer-detailed-errors",
#if 0
[VD_AGENT_CAP_GRAPHICS_DEVICE_INFO] = "graphics-device-info",
[VD_AGENT_CAP_CLIPBOARD_NO_RELEASE_ON_REGRAB] = "clipboard-no-release-on-regrab",
[VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL] = "clipboard-grab-serial",
#endif
};
static const char *msg_name[] = {
[VD_AGENT_MOUSE_STATE] = "mouse-state",
[VD_AGENT_MONITORS_CONFIG] = "monitors-config",
[VD_AGENT_REPLY] = "reply",
[VD_AGENT_CLIPBOARD] = "clipboard",
[VD_AGENT_DISPLAY_CONFIG] = "display-config",
[VD_AGENT_ANNOUNCE_CAPABILITIES] = "announce-capabilities",
[VD_AGENT_CLIPBOARD_GRAB] = "clipboard-grab",
[VD_AGENT_CLIPBOARD_REQUEST] = "clipboard-request",
[VD_AGENT_CLIPBOARD_RELEASE] = "clipboard-release",
[VD_AGENT_FILE_XFER_START] = "file-xfer-start",
[VD_AGENT_FILE_XFER_STATUS] = "file-xfer-status",
[VD_AGENT_FILE_XFER_DATA] = "file-xfer-data",
[VD_AGENT_CLIENT_DISCONNECTED] = "client-disconnected",
[VD_AGENT_MAX_CLIPBOARD] = "max-clipboard",
[VD_AGENT_AUDIO_VOLUME_SYNC] = "audio-volume-sync",
#if 0
[VD_AGENT_GRAPHICS_DEVICE_INFO] = "graphics-device-info",
#endif
};
static const char *sel_name[] = {
[VD_AGENT_CLIPBOARD_SELECTION_CLIPBOARD] = "clipboard",
[VD_AGENT_CLIPBOARD_SELECTION_PRIMARY] = "primary",
[VD_AGENT_CLIPBOARD_SELECTION_SECONDARY] = "secondary",
};
static const char *type_name[] = {
[VD_AGENT_CLIPBOARD_NONE] = "none",
[VD_AGENT_CLIPBOARD_UTF8_TEXT] = "text",
[VD_AGENT_CLIPBOARD_IMAGE_PNG] = "png",
[VD_AGENT_CLIPBOARD_IMAGE_BMP] = "bmp",
[VD_AGENT_CLIPBOARD_IMAGE_TIFF] = "tiff",
[VD_AGENT_CLIPBOARD_IMAGE_JPG] = "jpg",
#if 0
[VD_AGENT_CLIPBOARD_FILE_LIST] = "files",
#endif
};
#define GET_NAME(_m, _v) \
(((_v) < ARRAY_SIZE(_m) && (_m[_v])) ? (_m[_v]) : "???")
/* ------------------------------------------------------------------ */
/* send messages */
static void vdagent_send_buf(VDAgentChardev *vd)
{
uint32_t len;
while (!buffer_empty(&vd->outbuf)) {
len = qemu_chr_be_can_write(CHARDEV(vd));
if (len == 0) {
return;
}
if (len > vd->outbuf.offset) {
len = vd->outbuf.offset;
}
qemu_chr_be_write(CHARDEV(vd), vd->outbuf.buffer, len);
buffer_advance(&vd->outbuf, len);
}
}
static void vdagent_send_msg(VDAgentChardev *vd, VDAgentMessage *msg)
{
uint8_t *msgbuf = (void *)msg;
uint32_t msgsize = sizeof(VDAgentMessage) + msg->size;
uint32_t msgoff = 0;
VDIChunkHeader chunk;
trace_vdagent_send(GET_NAME(msg_name, msg->type));
msg->protocol = VD_AGENT_PROTOCOL;
if (vd->outbuf.offset + msgsize > VDAGENT_BUFFER_LIMIT) {
error_report("buffer full, dropping message");
return;
}
while (msgoff < msgsize) {
chunk.port = VDP_CLIENT_PORT;
chunk.size = msgsize - msgoff;
if (chunk.size > 1024) {
chunk.size = 1024;
}
buffer_reserve(&vd->outbuf, sizeof(chunk) + chunk.size);
buffer_append(&vd->outbuf, &chunk, sizeof(chunk));
buffer_append(&vd->outbuf, msgbuf + msgoff, chunk.size);
msgoff += chunk.size;
}
vdagent_send_buf(vd);
}
static void vdagent_send_caps(VDAgentChardev *vd)
{
g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
sizeof(VDAgentAnnounceCapabilities) +
sizeof(uint32_t));
VDAgentAnnounceCapabilities *caps = (void *)msg->data;
msg->type = VD_AGENT_ANNOUNCE_CAPABILITIES;
msg->size = sizeof(VDAgentAnnounceCapabilities) + sizeof(uint32_t);
if (vd->mouse) {
caps->caps[0] |= (1 << VD_AGENT_CAP_MOUSE_STATE);
}
if (vd->clipboard) {
caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_BY_DEMAND);
caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_SELECTION);
}
vdagent_send_msg(vd, msg);
}
/* ------------------------------------------------------------------ */
/* mouse events */
static bool have_mouse(VDAgentChardev *vd)
{
return vd->mouse &&
(vd->caps & (1 << VD_AGENT_CAP_MOUSE_STATE));
}
static void vdagent_send_mouse(VDAgentChardev *vd)
{
g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
sizeof(VDAgentMouseState));
VDAgentMouseState *mouse = (void *)msg->data;
msg->type = VD_AGENT_MOUSE_STATE;
msg->size = sizeof(VDAgentMouseState);
mouse->x = vd->mouse_x;
mouse->y = vd->mouse_y;
mouse->buttons = vd->mouse_btn;
mouse->display_id = vd->mouse_display;
vdagent_send_msg(vd, msg);
}
static void vdagent_pointer_event(DeviceState *dev, QemuConsole *src,
InputEvent *evt)
{
static const int bmap[INPUT_BUTTON__MAX] = {
[INPUT_BUTTON_LEFT] = VD_AGENT_LBUTTON_MASK,
[INPUT_BUTTON_RIGHT] = VD_AGENT_RBUTTON_MASK,
[INPUT_BUTTON_MIDDLE] = VD_AGENT_MBUTTON_MASK,
[INPUT_BUTTON_WHEEL_UP] = VD_AGENT_UBUTTON_MASK,
[INPUT_BUTTON_WHEEL_DOWN] = VD_AGENT_DBUTTON_MASK,
#ifdef VD_AGENT_EBUTTON_MASK
[INPUT_BUTTON_SIDE] = VD_AGENT_SBUTTON_MASK,
[INPUT_BUTTON_EXTRA] = VD_AGENT_EBUTTON_MASK,
#endif
};
VDAgentChardev *vd = container_of(dev, struct VDAgentChardev, mouse_dev);
InputMoveEvent *move;
InputBtnEvent *btn;
uint32_t xres, yres;
switch (evt->type) {
case INPUT_EVENT_KIND_ABS:
move = evt->u.abs.data;
xres = qemu_console_get_width(src, 1024);
yres = qemu_console_get_height(src, 768);
if (move->axis == INPUT_AXIS_X) {
vd->mouse_x = qemu_input_scale_axis(move->value,
INPUT_EVENT_ABS_MIN,
INPUT_EVENT_ABS_MAX,
0, xres);
} else if (move->axis == INPUT_AXIS_Y) {
vd->mouse_y = qemu_input_scale_axis(move->value,
INPUT_EVENT_ABS_MIN,
INPUT_EVENT_ABS_MAX,
0, yres);
}
vd->mouse_display = qemu_console_get_index(src);
break;
case INPUT_EVENT_KIND_BTN:
btn = evt->u.btn.data;
if (btn->down) {
vd->mouse_btn |= bmap[btn->button];
} else {
vd->mouse_btn &= ~bmap[btn->button];
}
break;
default:
/* keep gcc happy */
break;
}
}
static void vdagent_pointer_sync(DeviceState *dev)
{
VDAgentChardev *vd = container_of(dev, struct VDAgentChardev, mouse_dev);
if (vd->caps & (1 << VD_AGENT_CAP_MOUSE_STATE)) {
vdagent_send_mouse(vd);
}
}
static QemuInputHandler vdagent_mouse_handler = {
.name = "vdagent mouse",
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
.event = vdagent_pointer_event,
.sync = vdagent_pointer_sync,
};
/* ------------------------------------------------------------------ */
/* clipboard */
static bool have_clipboard(VDAgentChardev *vd)
{
return vd->clipboard &&
(vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_BY_DEMAND));
}
static bool have_selection(VDAgentChardev *vd)
{
return vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_SELECTION);
}
static uint32_t type_qemu_to_vdagent(enum QemuClipboardType type)
{
switch (type) {
case QEMU_CLIPBOARD_TYPE_TEXT:
return VD_AGENT_CLIPBOARD_UTF8_TEXT;
default:
return VD_AGENT_CLIPBOARD_NONE;
}
}
static void vdagent_send_clipboard_grab(VDAgentChardev *vd,
QemuClipboardInfo *info)
{
g_autofree VDAgentMessage *msg =
g_malloc0(sizeof(VDAgentMessage) +
sizeof(uint32_t) * (QEMU_CLIPBOARD_TYPE__COUNT + 1));
uint8_t *s = msg->data;
uint32_t *data = (uint32_t *)msg->data;
uint32_t q, type;
if (have_selection(vd)) {
*s = info->selection;
data++;
msg->size += sizeof(uint32_t);
} else if (info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
return;
}
for (q = 0; q < QEMU_CLIPBOARD_TYPE__COUNT; q++) {
type = type_qemu_to_vdagent(q);
if (type != VD_AGENT_CLIPBOARD_NONE && info->types[q].available) {
*data = type;
data++;
msg->size += sizeof(uint32_t);
}
}
msg->type = VD_AGENT_CLIPBOARD_GRAB;
vdagent_send_msg(vd, msg);
}
static void vdagent_send_clipboard_release(VDAgentChardev *vd,
QemuClipboardInfo *info)
{
g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
sizeof(uint32_t));
if (have_selection(vd)) {
uint8_t *s = msg->data;
*s = info->selection;
msg->size += sizeof(uint32_t);
} else if (info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
return;
}
msg->type = VD_AGENT_CLIPBOARD_RELEASE;
vdagent_send_msg(vd, msg);
}
static void vdagent_send_clipboard_data(VDAgentChardev *vd,
QemuClipboardInfo *info,
QemuClipboardType type)
{
g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
sizeof(uint32_t) * 2 +
info->types[type].size);
uint8_t *s = msg->data;
uint32_t *data = (uint32_t *)msg->data;
if (have_selection(vd)) {
*s = info->selection;
data++;
msg->size += sizeof(uint32_t);
} else if (info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
return;
}
*data = type_qemu_to_vdagent(type);
data++;
msg->size += sizeof(uint32_t);
memcpy(data, info->types[type].data, info->types[type].size);
msg->size += info->types[type].size;
msg->type = VD_AGENT_CLIPBOARD;
vdagent_send_msg(vd, msg);
}
static void vdagent_send_empty_clipboard_data(VDAgentChardev *vd,
QemuClipboardSelection selection,
QemuClipboardType type)
{
g_autoptr(QemuClipboardInfo) info = qemu_clipboard_info_new(&vd->cbpeer, selection);
trace_vdagent_send_empty_clipboard();
vdagent_send_clipboard_data(vd, info, type);
}
static void vdagent_clipboard_notify(Notifier *notifier, void *data)
{
VDAgentChardev *vd = container_of(notifier, VDAgentChardev, cbpeer.update);
QemuClipboardInfo *info = data;
QemuClipboardSelection s = info->selection;
QemuClipboardType type;
bool self_update = info->owner == &vd->cbpeer;
if (info != qemu_clipboard_info(s)) {
vd->cbpending[s] = 0;
if (!self_update) {
if (info->owner) {
vdagent_send_clipboard_grab(vd, info);
} else {
vdagent_send_clipboard_release(vd, info);
}
}
return;
}
if (self_update) {
return;
}
for (type = 0; type < QEMU_CLIPBOARD_TYPE__COUNT; type++) {
if (vd->cbpending[s] & (1 << type)) {
vd->cbpending[s] &= ~(1 << type);
vdagent_send_clipboard_data(vd, info, type);
}
}
}
static void vdagent_clipboard_request(QemuClipboardInfo *info,
QemuClipboardType qtype)
{
VDAgentChardev *vd = container_of(info->owner, VDAgentChardev, cbpeer);
g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
sizeof(uint32_t) * 2);
uint32_t type = type_qemu_to_vdagent(qtype);
uint8_t *s = msg->data;
uint32_t *data = (uint32_t *)msg->data;
if (type == VD_AGENT_CLIPBOARD_NONE) {
return;
}
if (have_selection(vd)) {
*s = info->selection;
data++;
msg->size += sizeof(uint32_t);
}
*data = type;
msg->size += sizeof(uint32_t);
msg->type = VD_AGENT_CLIPBOARD_REQUEST;
vdagent_send_msg(vd, msg);
}
static void vdagent_clipboard_recv_grab(VDAgentChardev *vd, uint8_t s, uint32_t size, void *data)
{
g_autoptr(QemuClipboardInfo) info = NULL;
trace_vdagent_cb_grab_selection(GET_NAME(sel_name, s));
info = qemu_clipboard_info_new(&vd->cbpeer, s);
if (size > sizeof(uint32_t) * 10) {
/*
* spice has 6 types as of 2021. Limiting to 10 entries
* so we we have some wiggle room.
*/
return;
}
while (size >= sizeof(uint32_t)) {
trace_vdagent_cb_grab_type(GET_NAME(type_name, *(uint32_t *)data));
switch (*(uint32_t *)data) {
case VD_AGENT_CLIPBOARD_UTF8_TEXT:
info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true;
break;
default:
break;
}
data += sizeof(uint32_t);
size -= sizeof(uint32_t);
}
qemu_clipboard_update(info);
}
static void vdagent_clipboard_recv_request(VDAgentChardev *vd, uint8_t s, uint32_t size, void *data)
{
QemuClipboardType type;
QemuClipboardInfo *info;
if (size < sizeof(uint32_t)) {
return;
}
switch (*(uint32_t *)data) {
case VD_AGENT_CLIPBOARD_UTF8_TEXT:
type = QEMU_CLIPBOARD_TYPE_TEXT;
break;
default:
return;
}
info = qemu_clipboard_info(s);
if (info && info->types[type].available && info->owner != &vd->cbpeer) {
if (info->types[type].data) {
vdagent_send_clipboard_data(vd, info, type);
} else {
vd->cbpending[s] |= (1 << type);
qemu_clipboard_request(info, type);
}
} else {
vdagent_send_empty_clipboard_data(vd, s, type);
}
}
static void vdagent_clipboard_recv_data(VDAgentChardev *vd, uint8_t s, uint32_t size, void *data)
{
QemuClipboardType type;
if (size < sizeof(uint32_t)) {
return;
}
switch (*(uint32_t *)data) {
case VD_AGENT_CLIPBOARD_UTF8_TEXT:
type = QEMU_CLIPBOARD_TYPE_TEXT;
break;
default:
return;
}
data += 4;
size -= 4;
if (qemu_clipboard_peer_owns(&vd->cbpeer, s)) {
qemu_clipboard_set_data(&vd->cbpeer, qemu_clipboard_info(s),
type, size, data, true);
}
}
static void vdagent_clipboard_recv_release(VDAgentChardev *vd, uint8_t s)
{
qemu_clipboard_peer_release(&vd->cbpeer, s);
}
static void vdagent_chr_recv_clipboard(VDAgentChardev *vd, VDAgentMessage *msg)
{
uint8_t s = VD_AGENT_CLIPBOARD_SELECTION_CLIPBOARD;
uint32_t size = msg->size;
void *data = msg->data;
if (have_selection(vd)) {
if (size < 4) {
return;
}
s = *(uint8_t *)data;
if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) {
return;
}
data += 4;
size -= 4;
}
switch (msg->type) {
case VD_AGENT_CLIPBOARD_GRAB:
return vdagent_clipboard_recv_grab(vd, s, size, data);
case VD_AGENT_CLIPBOARD_REQUEST:
return vdagent_clipboard_recv_request(vd, s, size, data);
case VD_AGENT_CLIPBOARD: /* data */
return vdagent_clipboard_recv_data(vd, s, size, data);
case VD_AGENT_CLIPBOARD_RELEASE:
return vdagent_clipboard_recv_release(vd, s);
default:
g_assert_not_reached();
}
}
/* ------------------------------------------------------------------ */
/* chardev backend */
static void vdagent_chr_open(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
ChardevQemuVDAgent *cfg = backend->u.qemu_vdagent.data;
#if defined(HOST_WORDS_BIGENDIAN)
/*
* TODO: vdagent protocol is defined to be LE,
* so we have to byteswap everything on BE hosts.
*/
error_setg(errp, "vdagent is not supported on bigendian hosts");
return;
#endif
if (migrate_add_blocker(vd->migration_blocker, errp) != 0) {
return;
}
vd->mouse = VDAGENT_MOUSE_DEFAULT;
if (cfg->has_mouse) {
vd->mouse = cfg->mouse;
}
vd->clipboard = VDAGENT_CLIPBOARD_DEFAULT;
if (cfg->has_clipboard) {
vd->clipboard = cfg->clipboard;
}
if (vd->mouse) {
vd->mouse_hs = qemu_input_handler_register(&vd->mouse_dev,
&vdagent_mouse_handler);
}
*be_opened = true;
}
static void vdagent_chr_recv_caps(VDAgentChardev *vd, VDAgentMessage *msg)
{
VDAgentAnnounceCapabilities *caps = (void *)msg->data;
int i;
if (msg->size < (sizeof(VDAgentAnnounceCapabilities) +
sizeof(uint32_t))) {
return;
}
for (i = 0; i < ARRAY_SIZE(cap_name); i++) {
if (caps->caps[0] & (1 << i)) {
trace_vdagent_peer_cap(GET_NAME(cap_name, i));
}
}
vd->caps = caps->caps[0];
if (caps->request) {
vdagent_send_caps(vd);
}
if (have_mouse(vd) && vd->mouse_hs) {
qemu_input_handler_activate(vd->mouse_hs);
}
if (have_clipboard(vd) && vd->cbpeer.update.notify == NULL) {
vd->cbpeer.name = "vdagent";
vd->cbpeer.update.notify = vdagent_clipboard_notify;
vd->cbpeer.request = vdagent_clipboard_request;
qemu_clipboard_peer_register(&vd->cbpeer);
}
}
static void vdagent_chr_recv_msg(VDAgentChardev *vd, VDAgentMessage *msg)
{
trace_vdagent_recv_msg(GET_NAME(msg_name, msg->type), msg->size);
switch (msg->type) {
case VD_AGENT_ANNOUNCE_CAPABILITIES:
vdagent_chr_recv_caps(vd, msg);
break;
case VD_AGENT_CLIPBOARD:
case VD_AGENT_CLIPBOARD_GRAB:
case VD_AGENT_CLIPBOARD_REQUEST:
case VD_AGENT_CLIPBOARD_RELEASE:
if (have_clipboard(vd)) {
vdagent_chr_recv_clipboard(vd, msg);
}
break;
default:
break;
}
}
static void vdagent_reset_xbuf(VDAgentChardev *vd)
{
g_clear_pointer(&vd->xbuf, g_free);
vd->xoff = 0;
vd->xsize = 0;
}
static void vdagent_chr_recv_chunk(VDAgentChardev *vd)
{
VDAgentMessage *msg = (void *)vd->msgbuf;
if (!vd->xsize) {
if (vd->msgsize < sizeof(*msg)) {
error_report("%s: message too small: %d < %zd", __func__,
vd->msgsize, sizeof(*msg));
return;
}
if (vd->msgsize == msg->size + sizeof(*msg)) {
vdagent_chr_recv_msg(vd, msg);
return;
}
}
if (!vd->xsize) {
vd->xsize = msg->size + sizeof(*msg);
vd->xbuf = g_malloc0(vd->xsize);
}
if (vd->xoff + vd->msgsize > vd->xsize) {
error_report("%s: Oops: %d+%d > %d", __func__,
vd->xoff, vd->msgsize, vd->xsize);
vdagent_reset_xbuf(vd);
return;
}
memcpy(vd->xbuf + vd->xoff, vd->msgbuf, vd->msgsize);
vd->xoff += vd->msgsize;
if (vd->xoff < vd->xsize) {
return;
}
msg = (void *)vd->xbuf;
vdagent_chr_recv_msg(vd, msg);
vdagent_reset_xbuf(vd);
}
static void vdagent_reset_bufs(VDAgentChardev *vd)
{
memset(&vd->chunk, 0, sizeof(vd->chunk));
vd->chunksize = 0;
g_free(vd->msgbuf);
vd->msgbuf = NULL;
vd->msgsize = 0;
}
static int vdagent_chr_write(Chardev *chr, const uint8_t *buf, int len)
{
VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
uint32_t copy, ret = len;
while (len) {
if (vd->chunksize < sizeof(vd->chunk)) {
copy = sizeof(vd->chunk) - vd->chunksize;
if (copy > len) {
copy = len;
}
memcpy((void *)(&vd->chunk) + vd->chunksize, buf, copy);
vd->chunksize += copy;
buf += copy;
len -= copy;
if (vd->chunksize < sizeof(vd->chunk)) {
break;
}
assert(vd->msgbuf == NULL);
vd->msgbuf = g_malloc0(vd->chunk.size);
}
copy = vd->chunk.size - vd->msgsize;
if (copy > len) {
copy = len;
}
memcpy(vd->msgbuf + vd->msgsize, buf, copy);
vd->msgsize += copy;
buf += copy;
len -= copy;
if (vd->msgsize == vd->chunk.size) {
trace_vdagent_recv_chunk(vd->chunk.size);
vdagent_chr_recv_chunk(vd);
vdagent_reset_bufs(vd);
}
}
return ret;
}
static void vdagent_chr_accept_input(Chardev *chr)
{
VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
vdagent_send_buf(vd);
}
static void vdagent_disconnect(VDAgentChardev *vd)
{
buffer_reset(&vd->outbuf);
vdagent_reset_bufs(vd);
vd->caps = 0;
if (vd->mouse_hs) {
qemu_input_handler_deactivate(vd->mouse_hs);
}
if (vd->cbpeer.update.notify) {
qemu_clipboard_peer_unregister(&vd->cbpeer);
memset(&vd->cbpeer, 0, sizeof(vd->cbpeer));
}
}
static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open)
{
VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
if (!fe_open) {
trace_vdagent_close();
vdagent_disconnect(vd);
return;
}
trace_vdagent_open();
}
static void vdagent_chr_parse(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
ChardevQemuVDAgent *cfg;
backend->type = CHARDEV_BACKEND_KIND_QEMU_VDAGENT;
cfg = backend->u.qemu_vdagent.data = g_new0(ChardevQemuVDAgent, 1);
qemu_chr_parse_common(opts, qapi_ChardevQemuVDAgent_base(cfg));
cfg->has_mouse = true;
cfg->mouse = qemu_opt_get_bool(opts, "mouse", VDAGENT_MOUSE_DEFAULT);
cfg->has_clipboard = true;
cfg->clipboard = qemu_opt_get_bool(opts, "clipboard", VDAGENT_CLIPBOARD_DEFAULT);
}
/* ------------------------------------------------------------------ */
static void vdagent_chr_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->parse = vdagent_chr_parse;
cc->open = vdagent_chr_open;
cc->chr_write = vdagent_chr_write;
cc->chr_set_fe_open = vdagent_chr_set_fe_open;
cc->chr_accept_input = vdagent_chr_accept_input;
}
static void vdagent_chr_init(Object *obj)
{
VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj);
buffer_init(&vd->outbuf, "vdagent-outbuf");
error_setg(&vd->migration_blocker,
"The vdagent chardev doesn't yet support migration");
}
static void vdagent_chr_fini(Object *obj)
{
VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj);
migrate_del_blocker(vd->migration_blocker);
vdagent_disconnect(vd);
buffer_free(&vd->outbuf);
error_free(vd->migration_blocker);
}
static const TypeInfo vdagent_chr_type_info = {
.name = TYPE_CHARDEV_QEMU_VDAGENT,
.parent = TYPE_CHARDEV,
.instance_size = sizeof(VDAgentChardev),
.instance_init = vdagent_chr_init,
.instance_finalize = vdagent_chr_fini,
.class_init = vdagent_chr_class_init,
};
static void register_types(void)
{
type_register_static(&vdagent_chr_type_info);
}
type_init(register_types);
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