| #include "config-host.h" |
| #include "trace.h" |
| #include "ui/qemu-spice.h" |
| #include "char/char.h" |
| #include <spice.h> |
| #include <spice-experimental.h> |
| |
| #include "qemu/osdep.h" |
| |
| #define dprintf(_scd, _level, _fmt, ...) \ |
| do { \ |
| static unsigned __dprintf_counter = 0; \ |
| if (_scd->debug >= _level) { \ |
| fprintf(stderr, "scd: %3d: " _fmt, ++__dprintf_counter, ## __VA_ARGS__);\ |
| } \ |
| } while (0) |
| |
| #define VMC_MAX_HOST_WRITE 2048 |
| |
| typedef struct SpiceCharDriver { |
| CharDriverState* chr; |
| SpiceCharDeviceInstance sin; |
| char *subtype; |
| bool active; |
| uint8_t *buffer; |
| uint8_t *datapos; |
| ssize_t bufsize, datalen; |
| uint32_t debug; |
| } SpiceCharDriver; |
| |
| static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len) |
| { |
| SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); |
| ssize_t out = 0; |
| ssize_t last_out; |
| uint8_t* p = (uint8_t*)buf; |
| |
| while (len > 0) { |
| last_out = MIN(len, VMC_MAX_HOST_WRITE); |
| if (qemu_chr_be_can_write(scd->chr) < last_out) { |
| break; |
| } |
| qemu_chr_be_write(scd->chr, p, last_out); |
| out += last_out; |
| len -= last_out; |
| p += last_out; |
| } |
| |
| dprintf(scd, 3, "%s: %zu/%zd\n", __func__, out, len + out); |
| trace_spice_vmc_write(out, len + out); |
| return out; |
| } |
| |
| static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len) |
| { |
| SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); |
| int bytes = MIN(len, scd->datalen); |
| |
| dprintf(scd, 2, "%s: %p %d/%d/%zd\n", __func__, scd->datapos, len, bytes, scd->datalen); |
| if (bytes > 0) { |
| memcpy(buf, scd->datapos, bytes); |
| scd->datapos += bytes; |
| scd->datalen -= bytes; |
| assert(scd->datalen >= 0); |
| if (scd->datalen == 0) { |
| scd->datapos = 0; |
| } |
| } |
| trace_spice_vmc_read(bytes, len); |
| return bytes; |
| } |
| |
| static void vmc_state(SpiceCharDeviceInstance *sin, int connected) |
| { |
| SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); |
| |
| #if SPICE_SERVER_VERSION < 0x000901 |
| /* |
| * spice-server calls the state callback for the agent channel when the |
| * spice client connects / disconnects. Given that not the client but |
| * the server is doing the parsing of the messages this is wrong as the |
| * server is still listening. Worse, this causes the parser in the server |
| * to go out of sync, so we ignore state calls for subtype vdagent |
| * spicevmc chardevs. For the full story see: |
| * http://lists.freedesktop.org/archives/spice-devel/2011-July/004837.html |
| */ |
| if (strcmp(sin->subtype, "vdagent") == 0) { |
| return; |
| } |
| #endif |
| |
| if ((scd->chr->opened && connected) || |
| (!scd->chr->opened && !connected)) { |
| return; |
| } |
| |
| qemu_chr_be_event(scd->chr, |
| connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED); |
| } |
| |
| static SpiceCharDeviceInterface vmc_interface = { |
| .base.type = SPICE_INTERFACE_CHAR_DEVICE, |
| .base.description = "spice virtual channel char device", |
| .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR, |
| .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR, |
| .state = vmc_state, |
| .write = vmc_write, |
| .read = vmc_read, |
| }; |
| |
| |
| static void vmc_register_interface(SpiceCharDriver *scd) |
| { |
| if (scd->active) { |
| return; |
| } |
| dprintf(scd, 1, "%s\n", __func__); |
| scd->sin.base.sif = &vmc_interface.base; |
| qemu_spice_add_interface(&scd->sin.base); |
| scd->active = true; |
| trace_spice_vmc_register_interface(scd); |
| } |
| |
| static void vmc_unregister_interface(SpiceCharDriver *scd) |
| { |
| if (!scd->active) { |
| return; |
| } |
| dprintf(scd, 1, "%s\n", __func__); |
| spice_server_remove_interface(&scd->sin.base); |
| scd->active = false; |
| trace_spice_vmc_unregister_interface(scd); |
| } |
| |
| |
| static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| SpiceCharDriver *s = chr->opaque; |
| |
| dprintf(s, 2, "%s: %d\n", __func__, len); |
| vmc_register_interface(s); |
| assert(s->datalen == 0); |
| if (s->bufsize < len) { |
| s->bufsize = len; |
| s->buffer = g_realloc(s->buffer, s->bufsize); |
| } |
| memcpy(s->buffer, buf, len); |
| s->datapos = s->buffer; |
| s->datalen = len; |
| spice_server_char_device_wakeup(&s->sin); |
| return len; |
| } |
| |
| static void spice_chr_close(struct CharDriverState *chr) |
| { |
| SpiceCharDriver *s = chr->opaque; |
| |
| printf("%s\n", __func__); |
| vmc_unregister_interface(s); |
| g_free(s); |
| } |
| |
| static void spice_chr_guest_open(struct CharDriverState *chr) |
| { |
| SpiceCharDriver *s = chr->opaque; |
| vmc_register_interface(s); |
| } |
| |
| static void spice_chr_guest_close(struct CharDriverState *chr) |
| { |
| SpiceCharDriver *s = chr->opaque; |
| vmc_unregister_interface(s); |
| } |
| |
| static void print_allowed_subtypes(void) |
| { |
| const char** psubtype; |
| int i; |
| |
| fprintf(stderr, "allowed names: "); |
| for(i=0, psubtype = spice_server_char_device_recognized_subtypes(); |
| *psubtype != NULL; ++psubtype, ++i) { |
| if (i == 0) { |
| fprintf(stderr, "%s", *psubtype); |
| } else { |
| fprintf(stderr, ", %s", *psubtype); |
| } |
| } |
| fprintf(stderr, "\n"); |
| } |
| |
| CharDriverState *qemu_chr_open_spice(QemuOpts *opts) |
| { |
| CharDriverState *chr; |
| SpiceCharDriver *s; |
| const char* name = qemu_opt_get(opts, "name"); |
| uint32_t debug = qemu_opt_get_number(opts, "debug", 0); |
| const char** psubtype = spice_server_char_device_recognized_subtypes(); |
| const char *subtype = NULL; |
| |
| if (name == NULL) { |
| fprintf(stderr, "spice-qemu-char: missing name parameter\n"); |
| print_allowed_subtypes(); |
| return NULL; |
| } |
| for(;*psubtype != NULL; ++psubtype) { |
| if (strcmp(name, *psubtype) == 0) { |
| subtype = *psubtype; |
| break; |
| } |
| } |
| if (subtype == NULL) { |
| fprintf(stderr, "spice-qemu-char: unsupported name: %s\n", name); |
| print_allowed_subtypes(); |
| return NULL; |
| } |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(SpiceCharDriver)); |
| s->chr = chr; |
| s->debug = debug; |
| s->active = false; |
| s->sin.subtype = subtype; |
| chr->opaque = s; |
| chr->chr_write = spice_chr_write; |
| chr->chr_close = spice_chr_close; |
| chr->chr_guest_open = spice_chr_guest_open; |
| chr->chr_guest_close = spice_chr_guest_close; |
| |
| #if SPICE_SERVER_VERSION < 0x000901 |
| /* See comment in vmc_state() */ |
| if (strcmp(subtype, "vdagent") == 0) { |
| qemu_chr_generic_open(chr); |
| } |
| #endif |
| |
| return chr; |
| } |