#include "config-host.h" #include "trace.h" #include "ui/qemu-spice.h" #include <spice.h> #include <spice-experimental.h> #include "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; }