#include "qemu/osdep.h" #include "trace.h" #include "ui/qemu-spice.h" #include "sysemu/char.h" #include <spice.h> #include <spice/protocol.h> typedef struct SpiceCharDriver { CharDriverState* chr; SpiceCharDeviceInstance sin; bool active; bool blocked; const uint8_t *datapos; int datalen; QLIST_ENTRY(SpiceCharDriver) next; } SpiceCharDriver; typedef struct SpiceCharSource { GSource source; SpiceCharDriver *scd; } SpiceCharSource; static QLIST_HEAD(, SpiceCharDriver) spice_chars = QLIST_HEAD_INITIALIZER(spice_chars); 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) { int can_write = qemu_chr_be_can_write(scd->chr); last_out = MIN(len, can_write); if (last_out <= 0) { break; } qemu_chr_be_write(scd->chr, p, last_out); out += last_out; len -= last_out; p += last_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); 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; scd->blocked = false; } trace_spice_vmc_read(bytes, len); return bytes; } #if SPICE_SERVER_VERSION >= 0x000c02 static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event) { SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); int chr_event; switch (event) { case SPICE_PORT_EVENT_BREAK: chr_event = CHR_EVENT_BREAK; break; default: return; } trace_spice_vmc_event(chr_event); qemu_chr_be_event(scd->chr, chr_event); } #endif static void vmc_state(SpiceCharDeviceInstance *sin, int connected) { SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); if ((scd->chr->be_open && connected) || (!scd->chr->be_open && !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, #if SPICE_SERVER_VERSION >= 0x000c02 .event = vmc_event, #endif #if SPICE_SERVER_VERSION >= 0x000c06 .flags = SPICE_CHAR_DEVICE_NOTIFY_WRITABLE, #endif }; static void vmc_register_interface(SpiceCharDriver *scd) { if (scd->active) { return; } 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; } spice_server_remove_interface(&scd->sin.base); scd->active = false; trace_spice_vmc_unregister_interface(scd); } static gboolean spice_char_source_prepare(GSource *source, gint *timeout) { SpiceCharSource *src = (SpiceCharSource *)source; *timeout = -1; return !src->scd->blocked; } static gboolean spice_char_source_check(GSource *source) { SpiceCharSource *src = (SpiceCharSource *)source; return !src->scd->blocked; } static gboolean spice_char_source_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) { GIOFunc func = (GIOFunc)callback; return func(NULL, G_IO_OUT, user_data); } static GSourceFuncs SpiceCharSourceFuncs = { .prepare = spice_char_source_prepare, .check = spice_char_source_check, .dispatch = spice_char_source_dispatch, }; static GSource *spice_chr_add_watch(CharDriverState *chr, GIOCondition cond) { SpiceCharDriver *scd = chr->opaque; SpiceCharSource *src; assert(cond & G_IO_OUT); src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs, sizeof(SpiceCharSource)); src->scd = scd; return (GSource *)src; } static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { SpiceCharDriver *s = chr->opaque; int read_bytes; assert(s->datalen == 0); s->datapos = buf; s->datalen = len; spice_server_char_device_wakeup(&s->sin); read_bytes = len - s->datalen; if (read_bytes != len) { /* We'll get passed in the unconsumed data with the next call */ s->datalen = 0; s->datapos = NULL; s->blocked = true; } return read_bytes; } static void spice_chr_close(struct CharDriverState *chr) { SpiceCharDriver *s = chr->opaque; vmc_unregister_interface(s); QLIST_REMOVE(s, next); g_free((char *)s->sin.subtype); #if SPICE_SERVER_VERSION >= 0x000c02 g_free((char *)s->sin.portname); #endif g_free(s); } static void spice_vmc_set_fe_open(struct CharDriverState *chr, int fe_open) { SpiceCharDriver *s = chr->opaque; if (fe_open) { vmc_register_interface(s); } else { vmc_unregister_interface(s); } } static void spice_port_set_fe_open(struct CharDriverState *chr, int fe_open) { #if SPICE_SERVER_VERSION >= 0x000c02 SpiceCharDriver *s = chr->opaque; if (fe_open) { spice_server_port_event(&s->sin, SPICE_PORT_EVENT_OPENED); } else { spice_server_port_event(&s->sin, SPICE_PORT_EVENT_CLOSED); } #endif } static void spice_chr_fe_event(struct CharDriverState *chr, int event) { #if SPICE_SERVER_VERSION >= 0x000c02 SpiceCharDriver *s = chr->opaque; spice_server_port_event(&s->sin, event); #endif } 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"); } static void spice_chr_accept_input(struct CharDriverState *chr) { SpiceCharDriver *s = chr->opaque; spice_server_char_device_wakeup(&s->sin); } static CharDriverState *chr_open(const char *subtype, void (*set_fe_open)(struct CharDriverState *, int), ChardevCommon *backend, Error **errp) { CharDriverState *chr; SpiceCharDriver *s; chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } s = g_malloc0(sizeof(SpiceCharDriver)); s->chr = chr; s->active = false; s->sin.subtype = g_strdup(subtype); chr->opaque = s; chr->chr_write = spice_chr_write; chr->chr_add_watch = spice_chr_add_watch; chr->chr_close = spice_chr_close; chr->chr_set_fe_open = set_fe_open; chr->explicit_be_open = true; chr->chr_fe_event = spice_chr_fe_event; chr->chr_accept_input = spice_chr_accept_input; QLIST_INSERT_HEAD(&spice_chars, s, next); return chr; } static CharDriverState *qemu_chr_open_spice_vmc(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { const char *type = backend->u.spicevmc->type; const char **psubtype = spice_server_char_device_recognized_subtypes(); ChardevCommon *common = qapi_ChardevSpiceChannel_base(backend->u.spicevmc); for (; *psubtype != NULL; ++psubtype) { if (strcmp(type, *psubtype) == 0) { break; } } if (*psubtype == NULL) { fprintf(stderr, "spice-qemu-char: unsupported type: %s\n", type); print_allowed_subtypes(); return NULL; } return chr_open(type, spice_vmc_set_fe_open, common, errp); } #if SPICE_SERVER_VERSION >= 0x000c02 static CharDriverState *qemu_chr_open_spice_port(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { const char *name = backend->u.spiceport->fqdn; ChardevCommon *common = qapi_ChardevSpicePort_base(backend->u.spiceport); CharDriverState *chr; SpiceCharDriver *s; if (name == NULL) { fprintf(stderr, "spice-qemu-char: missing name parameter\n"); return NULL; } chr = chr_open("port", spice_port_set_fe_open, common, errp); if (!chr) { return NULL; } s = chr->opaque; s->sin.portname = g_strdup(name); return chr; } void qemu_spice_register_ports(void) { SpiceCharDriver *s; QLIST_FOREACH(s, &spice_chars, next) { if (s->sin.portname == NULL) { continue; } vmc_register_interface(s); } } #endif static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *name = qemu_opt_get(opts, "name"); if (name == NULL) { error_setg(errp, "chardev: spice channel: no name given"); return; } backend->u.spicevmc = g_new0(ChardevSpiceChannel, 1); backend->u.spicevmc->type = g_strdup(name); } static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *name = qemu_opt_get(opts, "name"); if (name == NULL) { error_setg(errp, "chardev: spice port: no name given"); return; } backend->u.spiceport = g_new0(ChardevSpicePort, 1); backend->u.spiceport->fqdn = g_strdup(name); } static void register_types(void) { register_char_driver("spicevmc", CHARDEV_BACKEND_KIND_SPICEVMC, qemu_chr_parse_spice_vmc, qemu_chr_open_spice_vmc); register_char_driver("spiceport", CHARDEV_BACKEND_KIND_SPICEPORT, qemu_chr_parse_spice_port, qemu_chr_open_spice_port); } type_init(register_types);