424 lines
11 KiB
C
424 lines
11 KiB
C
#include "qemu/osdep.h"
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#include "trace.h"
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#include "ui/qemu-spice.h"
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#include "chardev/char.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qemu/option.h"
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#include <spice.h>
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#include <spice/protocol.h>
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typedef struct SpiceChardev {
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Chardev parent;
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SpiceCharDeviceInstance sin;
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bool active;
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bool blocked;
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const uint8_t *datapos;
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int datalen;
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QLIST_ENTRY(SpiceChardev) next;
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} SpiceChardev;
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#define TYPE_CHARDEV_SPICE "chardev-spice"
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#define TYPE_CHARDEV_SPICEVMC "chardev-spicevmc"
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#define TYPE_CHARDEV_SPICEPORT "chardev-spiceport"
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#define SPICE_CHARDEV(obj) OBJECT_CHECK(SpiceChardev, (obj), TYPE_CHARDEV_SPICE)
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typedef struct SpiceCharSource {
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GSource source;
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SpiceChardev *scd;
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} SpiceCharSource;
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static QLIST_HEAD(, SpiceChardev) spice_chars =
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QLIST_HEAD_INITIALIZER(spice_chars);
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static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
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{
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SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
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Chardev *chr = CHARDEV(scd);
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ssize_t out = 0;
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ssize_t last_out;
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uint8_t* p = (uint8_t*)buf;
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while (len > 0) {
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int can_write = qemu_chr_be_can_write(chr);
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last_out = MIN(len, can_write);
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if (last_out <= 0) {
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break;
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}
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qemu_chr_be_write(chr, p, last_out);
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out += last_out;
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len -= last_out;
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p += last_out;
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}
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trace_spice_vmc_write(out, len + out);
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return out;
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}
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static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len)
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{
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SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
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int bytes = MIN(len, scd->datalen);
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if (bytes > 0) {
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memcpy(buf, scd->datapos, bytes);
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scd->datapos += bytes;
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scd->datalen -= bytes;
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assert(scd->datalen >= 0);
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}
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if (scd->datalen == 0) {
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scd->datapos = 0;
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scd->blocked = false;
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}
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trace_spice_vmc_read(bytes, len);
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return bytes;
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}
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#if SPICE_SERVER_VERSION >= 0x000c02
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static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event)
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{
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SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
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Chardev *chr = CHARDEV(scd);
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int chr_event;
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switch (event) {
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case SPICE_PORT_EVENT_BREAK:
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chr_event = CHR_EVENT_BREAK;
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break;
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default:
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return;
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}
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trace_spice_vmc_event(chr_event);
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qemu_chr_be_event(chr, chr_event);
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}
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#endif
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static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
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{
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SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
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Chardev *chr = CHARDEV(scd);
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if ((chr->be_open && connected) ||
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(!chr->be_open && !connected)) {
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return;
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}
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qemu_chr_be_event(chr,
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connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
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}
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static SpiceCharDeviceInterface vmc_interface = {
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.base.type = SPICE_INTERFACE_CHAR_DEVICE,
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.base.description = "spice virtual channel char device",
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.base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR,
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.base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR,
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.state = vmc_state,
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.write = vmc_write,
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.read = vmc_read,
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#if SPICE_SERVER_VERSION >= 0x000c02
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.event = vmc_event,
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#endif
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#if SPICE_SERVER_VERSION >= 0x000c06
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.flags = SPICE_CHAR_DEVICE_NOTIFY_WRITABLE,
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#endif
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};
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static void vmc_register_interface(SpiceChardev *scd)
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{
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if (scd->active) {
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return;
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}
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scd->sin.base.sif = &vmc_interface.base;
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qemu_spice_add_interface(&scd->sin.base);
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scd->active = true;
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trace_spice_vmc_register_interface(scd);
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}
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static void vmc_unregister_interface(SpiceChardev *scd)
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{
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if (!scd->active) {
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return;
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}
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spice_server_remove_interface(&scd->sin.base);
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scd->active = false;
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trace_spice_vmc_unregister_interface(scd);
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}
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static gboolean spice_char_source_prepare(GSource *source, gint *timeout)
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{
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SpiceCharSource *src = (SpiceCharSource *)source;
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*timeout = -1;
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return !src->scd->blocked;
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}
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static gboolean spice_char_source_check(GSource *source)
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{
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SpiceCharSource *src = (SpiceCharSource *)source;
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return !src->scd->blocked;
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}
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static gboolean spice_char_source_dispatch(GSource *source,
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GSourceFunc callback, gpointer user_data)
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{
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GIOFunc func = (GIOFunc)callback;
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return func(NULL, G_IO_OUT, user_data);
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}
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static GSourceFuncs SpiceCharSourceFuncs = {
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.prepare = spice_char_source_prepare,
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.check = spice_char_source_check,
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.dispatch = spice_char_source_dispatch,
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};
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static GSource *spice_chr_add_watch(Chardev *chr, GIOCondition cond)
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{
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SpiceChardev *scd = SPICE_CHARDEV(chr);
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SpiceCharSource *src;
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assert(cond & G_IO_OUT);
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src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs,
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sizeof(SpiceCharSource));
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src->scd = scd;
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return (GSource *)src;
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}
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static int spice_chr_write(Chardev *chr, const uint8_t *buf, int len)
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{
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SpiceChardev *s = SPICE_CHARDEV(chr);
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int read_bytes;
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assert(s->datalen == 0);
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s->datapos = buf;
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s->datalen = len;
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spice_server_char_device_wakeup(&s->sin);
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read_bytes = len - s->datalen;
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if (read_bytes != len) {
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/* We'll get passed in the unconsumed data with the next call */
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s->datalen = 0;
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s->datapos = NULL;
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s->blocked = true;
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}
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return read_bytes;
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}
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static void char_spice_finalize(Object *obj)
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{
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SpiceChardev *s = SPICE_CHARDEV(obj);
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vmc_unregister_interface(s);
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if (s->next.le_prev) {
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QLIST_REMOVE(s, next);
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}
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g_free((char *)s->sin.subtype);
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#if SPICE_SERVER_VERSION >= 0x000c02
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g_free((char *)s->sin.portname);
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#endif
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}
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static void spice_vmc_set_fe_open(struct Chardev *chr, int fe_open)
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{
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SpiceChardev *s = SPICE_CHARDEV(chr);
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if (fe_open) {
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vmc_register_interface(s);
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} else {
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vmc_unregister_interface(s);
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}
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}
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static void spice_port_set_fe_open(struct Chardev *chr, int fe_open)
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{
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#if SPICE_SERVER_VERSION >= 0x000c02
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SpiceChardev *s = SPICE_CHARDEV(chr);
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if (fe_open) {
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spice_server_port_event(&s->sin, SPICE_PORT_EVENT_OPENED);
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} else {
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spice_server_port_event(&s->sin, SPICE_PORT_EVENT_CLOSED);
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}
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#endif
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}
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static void spice_chr_accept_input(struct Chardev *chr)
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{
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SpiceChardev *s = SPICE_CHARDEV(chr);
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spice_server_char_device_wakeup(&s->sin);
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}
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static void chr_open(Chardev *chr, const char *subtype)
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{
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SpiceChardev *s = SPICE_CHARDEV(chr);
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s->active = false;
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s->sin.subtype = g_strdup(subtype);
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QLIST_INSERT_HEAD(&spice_chars, s, next);
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}
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static void qemu_chr_open_spice_vmc(Chardev *chr,
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ChardevBackend *backend,
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bool *be_opened,
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Error **errp)
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{
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ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data;
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const char *type = spicevmc->type;
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const char **psubtype = spice_server_char_device_recognized_subtypes();
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for (; *psubtype != NULL; ++psubtype) {
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if (strcmp(type, *psubtype) == 0) {
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break;
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}
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}
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if (*psubtype == NULL) {
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char *subtypes = g_strjoinv(", ",
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(gchar **)spice_server_char_device_recognized_subtypes());
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error_setg(errp, "unsupported type name: %s", type);
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error_append_hint(errp, "allowed spice char type names: %s\n",
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subtypes);
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g_free(subtypes);
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return;
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}
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*be_opened = false;
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chr_open(chr, type);
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}
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#if SPICE_SERVER_VERSION >= 0x000c02
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static void qemu_chr_open_spice_port(Chardev *chr,
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ChardevBackend *backend,
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bool *be_opened,
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Error **errp)
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{
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ChardevSpicePort *spiceport = backend->u.spiceport.data;
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const char *name = spiceport->fqdn;
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SpiceChardev *s;
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if (name == NULL) {
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error_setg(errp, "missing name parameter");
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return;
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}
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chr_open(chr, "port");
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*be_opened = false;
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s = SPICE_CHARDEV(chr);
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s->sin.portname = g_strdup(name);
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}
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void qemu_spice_register_ports(void)
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{
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SpiceChardev *s;
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QLIST_FOREACH(s, &spice_chars, next) {
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if (s->sin.portname == NULL) {
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continue;
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}
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vmc_register_interface(s);
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}
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}
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#endif
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static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend,
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Error **errp)
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{
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const char *name = qemu_opt_get(opts, "name");
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ChardevSpiceChannel *spicevmc;
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if (name == NULL) {
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error_setg(errp, "chardev: spice channel: no name given");
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return;
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}
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backend->type = CHARDEV_BACKEND_KIND_SPICEVMC;
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spicevmc = backend->u.spicevmc.data = g_new0(ChardevSpiceChannel, 1);
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qemu_chr_parse_common(opts, qapi_ChardevSpiceChannel_base(spicevmc));
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spicevmc->type = g_strdup(name);
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}
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static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
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Error **errp)
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{
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const char *name = qemu_opt_get(opts, "name");
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ChardevSpicePort *spiceport;
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if (name == NULL) {
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error_setg(errp, "chardev: spice port: no name given");
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return;
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}
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backend->type = CHARDEV_BACKEND_KIND_SPICEPORT;
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spiceport = backend->u.spiceport.data = g_new0(ChardevSpicePort, 1);
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qemu_chr_parse_common(opts, qapi_ChardevSpicePort_base(spiceport));
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spiceport->fqdn = g_strdup(name);
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}
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static void char_spice_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->chr_write = spice_chr_write;
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cc->chr_add_watch = spice_chr_add_watch;
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cc->chr_accept_input = spice_chr_accept_input;
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}
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static const TypeInfo char_spice_type_info = {
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.name = TYPE_CHARDEV_SPICE,
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.parent = TYPE_CHARDEV,
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.instance_size = sizeof(SpiceChardev),
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.instance_finalize = char_spice_finalize,
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.class_init = char_spice_class_init,
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.abstract = true,
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};
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static void char_spicevmc_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->parse = qemu_chr_parse_spice_vmc;
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cc->open = qemu_chr_open_spice_vmc;
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cc->chr_set_fe_open = spice_vmc_set_fe_open;
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}
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static const TypeInfo char_spicevmc_type_info = {
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.name = TYPE_CHARDEV_SPICEVMC,
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.parent = TYPE_CHARDEV_SPICE,
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.class_init = char_spicevmc_class_init,
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};
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static void char_spiceport_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->parse = qemu_chr_parse_spice_port;
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cc->open = qemu_chr_open_spice_port;
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cc->chr_set_fe_open = spice_port_set_fe_open;
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}
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static const TypeInfo char_spiceport_type_info = {
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.name = TYPE_CHARDEV_SPICEPORT,
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.parent = TYPE_CHARDEV_SPICE,
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.class_init = char_spiceport_class_init,
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};
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static void register_types(void)
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{
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type_register_static(&char_spice_type_info);
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type_register_static(&char_spicevmc_type_info);
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type_register_static(&char_spiceport_type_info);
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}
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type_init(register_types);
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