#include "qemu/osdep.h" #include "trace.h" #include "ui/qemu-spice.h" #include "chardev/char.h" #include "qapi/error.h" #include "qemu/error-report.h" #include "qemu/option.h" #include <spice.h> #include <spice/protocol.h> typedef struct SpiceChardev { Chardev parent; SpiceCharDeviceInstance sin; bool active; bool blocked; const uint8_t *datapos; int datalen; QLIST_ENTRY(SpiceChardev) next; } SpiceChardev; #define TYPE_CHARDEV_SPICE "chardev-spice" #define TYPE_CHARDEV_SPICEVMC "chardev-spicevmc" #define TYPE_CHARDEV_SPICEPORT "chardev-spiceport" #define SPICE_CHARDEV(obj) OBJECT_CHECK(SpiceChardev, (obj), TYPE_CHARDEV_SPICE) typedef struct SpiceCharSource { GSource source; SpiceChardev *scd; } SpiceCharSource; static QLIST_HEAD(, SpiceChardev) spice_chars = QLIST_HEAD_INITIALIZER(spice_chars); static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len) { SpiceChardev *scd = container_of(sin, SpiceChardev, sin); Chardev *chr = CHARDEV(scd); 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(chr); last_out = MIN(len, can_write); if (last_out <= 0) { break; } qemu_chr_be_write(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) { SpiceChardev *scd = container_of(sin, SpiceChardev, 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) { SpiceChardev *scd = container_of(sin, SpiceChardev, sin); Chardev *chr = CHARDEV(scd); 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(chr, chr_event); } #endif static void vmc_state(SpiceCharDeviceInstance *sin, int connected) { SpiceChardev *scd = container_of(sin, SpiceChardev, sin); Chardev *chr = CHARDEV(scd); if ((chr->be_open && connected) || (!chr->be_open && !connected)) { return; } qemu_chr_be_event(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(SpiceChardev *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(SpiceChardev *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(Chardev *chr, GIOCondition cond) { SpiceChardev *scd = SPICE_CHARDEV(chr); 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(Chardev *chr, const uint8_t *buf, int len) { SpiceChardev *s = SPICE_CHARDEV(chr); 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 char_spice_finalize(Object *obj) { SpiceChardev *s = SPICE_CHARDEV(obj); vmc_unregister_interface(s); if (s->next.le_prev) { QLIST_REMOVE(s, next); } g_free((char *)s->sin.subtype); #if SPICE_SERVER_VERSION >= 0x000c02 g_free((char *)s->sin.portname); #endif } static void spice_vmc_set_fe_open(struct Chardev *chr, int fe_open) { SpiceChardev *s = SPICE_CHARDEV(chr); if (fe_open) { vmc_register_interface(s); } else { vmc_unregister_interface(s); } } static void spice_port_set_fe_open(struct Chardev *chr, int fe_open) { #if SPICE_SERVER_VERSION >= 0x000c02 SpiceChardev *s = SPICE_CHARDEV(chr); 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_accept_input(struct Chardev *chr) { SpiceChardev *s = SPICE_CHARDEV(chr); spice_server_char_device_wakeup(&s->sin); } static void chr_open(Chardev *chr, const char *subtype) { SpiceChardev *s = SPICE_CHARDEV(chr); s->active = false; s->sin.subtype = g_strdup(subtype); QLIST_INSERT_HEAD(&spice_chars, s, next); } static void qemu_chr_open_spice_vmc(Chardev *chr, ChardevBackend *backend, bool *be_opened, Error **errp) { ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data; const char *type = spicevmc->type; const char **psubtype = spice_server_char_device_recognized_subtypes(); for (; *psubtype != NULL; ++psubtype) { if (strcmp(type, *psubtype) == 0) { break; } } if (*psubtype == NULL) { char *subtypes = g_strjoinv(", ", (gchar **)spice_server_char_device_recognized_subtypes()); error_setg(errp, "unsupported type name: %s", type); error_append_hint(errp, "allowed spice char type names: %s\n", subtypes); g_free(subtypes); return; } *be_opened = false; chr_open(chr, type); } #if SPICE_SERVER_VERSION >= 0x000c02 static void qemu_chr_open_spice_port(Chardev *chr, ChardevBackend *backend, bool *be_opened, Error **errp) { ChardevSpicePort *spiceport = backend->u.spiceport.data; const char *name = spiceport->fqdn; SpiceChardev *s; if (name == NULL) { error_setg(errp, "missing name parameter"); return; } chr_open(chr, "port"); *be_opened = false; s = SPICE_CHARDEV(chr); s->sin.portname = g_strdup(name); } void qemu_spice_register_ports(void) { SpiceChardev *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"); ChardevSpiceChannel *spicevmc; if (name == NULL) { error_setg(errp, "chardev: spice channel: no name given"); return; } backend->type = CHARDEV_BACKEND_KIND_SPICEVMC; spicevmc = backend->u.spicevmc.data = g_new0(ChardevSpiceChannel, 1); qemu_chr_parse_common(opts, qapi_ChardevSpiceChannel_base(spicevmc)); 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"); ChardevSpicePort *spiceport; if (name == NULL) { error_setg(errp, "chardev: spice port: no name given"); return; } backend->type = CHARDEV_BACKEND_KIND_SPICEPORT; spiceport = backend->u.spiceport.data = g_new0(ChardevSpicePort, 1); qemu_chr_parse_common(opts, qapi_ChardevSpicePort_base(spiceport)); spiceport->fqdn = g_strdup(name); } static void char_spice_class_init(ObjectClass *oc, void *data) { ChardevClass *cc = CHARDEV_CLASS(oc); cc->chr_write = spice_chr_write; cc->chr_add_watch = spice_chr_add_watch; cc->chr_accept_input = spice_chr_accept_input; } static const TypeInfo char_spice_type_info = { .name = TYPE_CHARDEV_SPICE, .parent = TYPE_CHARDEV, .instance_size = sizeof(SpiceChardev), .instance_finalize = char_spice_finalize, .class_init = char_spice_class_init, .abstract = true, }; static void char_spicevmc_class_init(ObjectClass *oc, void *data) { ChardevClass *cc = CHARDEV_CLASS(oc); cc->parse = qemu_chr_parse_spice_vmc; cc->open = qemu_chr_open_spice_vmc; cc->chr_set_fe_open = spice_vmc_set_fe_open; } static const TypeInfo char_spicevmc_type_info = { .name = TYPE_CHARDEV_SPICEVMC, .parent = TYPE_CHARDEV_SPICE, .class_init = char_spicevmc_class_init, }; static void char_spiceport_class_init(ObjectClass *oc, void *data) { ChardevClass *cc = CHARDEV_CLASS(oc); cc->parse = qemu_chr_parse_spice_port; cc->open = qemu_chr_open_spice_port; cc->chr_set_fe_open = spice_port_set_fe_open; } static const TypeInfo char_spiceport_type_info = { .name = TYPE_CHARDEV_SPICEPORT, .parent = TYPE_CHARDEV_SPICE, .class_init = char_spiceport_class_init, }; static void register_types(void) { type_register_static(&char_spice_type_info); type_register_static(&char_spicevmc_type_info); type_register_static(&char_spiceport_type_info); } type_init(register_types);