| Message ID | 20210519053940.1888907-5-kraxel@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ui: add vdagent implementation and clipboard support. | expand |
On Wed, May 19, 2021 at 9:40 AM Gerd Hoffmann <kraxel@redhat.com> wrote: > The vdagent protocol allows the guest agent (spice-vdagent) and the > spice client exchange messages to implement features which require > guest cooperation, for example clipboard support. > > This is a qemu implementation of the spice client side. This allows > the spice guest agent talk to qemu directly when not using the spice > protocol. > > usage: qemu \ > -chardev qemu-vdagent,id=vdagent \ > -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 > > This patch adds just the protocol basics: initial handshake and > capability negotiation. The following patches will add actual > functionality and also add fields to the initially empty > ChardevVDAgent qapi struct. > > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> > Acked-by: Markus Armbruster <armbru@redhat.com> > Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> --- > ui/vdagent.c | 361 ++++++++++++++++++++++++++++++++++++++++++++++++ > qapi/char.json | 17 ++- > ui/meson.build | 1 + > ui/trace-events | 8 ++ > 4 files changed, 386 insertions(+), 1 deletion(-) > create mode 100644 ui/vdagent.c > > diff --git a/ui/vdagent.c b/ui/vdagent.c > new file mode 100644 > index 000000000000..21e55a41eaba > --- /dev/null > +++ b/ui/vdagent.c > @@ -0,0 +1,361 @@ > +#include "qemu/osdep.h" > +#include "qapi/error.h" > +#include "include/qemu-common.h" > +#include "chardev/char.h" > +#include "qemu/buffer.h" > +#include "qemu/units.h" > +#include "trace.h" > + > +#include "qapi/qapi-types-char.h" > + > +#include "spice/vd_agent.h" > + > +#define VDAGENT_BUFFER_LIMIT (1 * MiB) > + > +struct VDAgentChardev { > + Chardev parent; > + > + /* guest vdagent */ > + uint32_t caps; > + VDIChunkHeader chunk; > + uint32_t chunksize; > + uint8_t *msgbuf; > + uint32_t msgsize; > + uint8_t *xbuf; > + uint32_t xoff, xsize; > + Buffer outbuf; > +}; > +typedef struct VDAgentChardev VDAgentChardev; > + > +#define TYPE_CHARDEV_QEMU_VDAGENT "chardev-qemu-vdagent" > + > +DECLARE_INSTANCE_CHECKER(VDAgentChardev, QEMU_VDAGENT_CHARDEV, > + TYPE_CHARDEV_QEMU_VDAGENT); > + > +/* ------------------------------------------------------------------ */ > +/* names, for debug logging */ > + > +static const char *cap_name[] = { > + [VD_AGENT_CAP_MOUSE_STATE] = "mouse-state", > + [VD_AGENT_CAP_MONITORS_CONFIG] = "monitors-config", > + [VD_AGENT_CAP_REPLY] = "reply", > + [VD_AGENT_CAP_CLIPBOARD] = "clipboard", > + [VD_AGENT_CAP_DISPLAY_CONFIG] = "display-config", > + [VD_AGENT_CAP_CLIPBOARD_BY_DEMAND] = "clipboard-by-demand", > + [VD_AGENT_CAP_CLIPBOARD_SELECTION] = "clipboard-selection", > + [VD_AGENT_CAP_SPARSE_MONITORS_CONFIG] = > "sparse-monitors-config", > + [VD_AGENT_CAP_GUEST_LINEEND_LF] = "guest-lineend-lf", > + [VD_AGENT_CAP_GUEST_LINEEND_CRLF] = "guest-lineend-crlf", > + [VD_AGENT_CAP_MAX_CLIPBOARD] = "max-clipboard", > + [VD_AGENT_CAP_AUDIO_VOLUME_SYNC] = "audio-volume-sync", > + [VD_AGENT_CAP_MONITORS_CONFIG_POSITION] = > "monitors-config-position", > + [VD_AGENT_CAP_FILE_XFER_DISABLED] = "file-xfer-disabled", > + [VD_AGENT_CAP_FILE_XFER_DETAILED_ERRORS] = > "file-xfer-detailed-errors", > +#if 0 > + [VD_AGENT_CAP_GRAPHICS_DEVICE_INFO] = > "graphics-device-info", > + [VD_AGENT_CAP_CLIPBOARD_NO_RELEASE_ON_REGRAB] = > "clipboard-no-release-on-regrab", > + [VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL] = > "clipboard-grab-serial", > +#endif > +}; > + > +static const char *msg_name[] = { > + [VD_AGENT_MOUSE_STATE] = "mouse-state", > + [VD_AGENT_MONITORS_CONFIG] = "monitors-config", > + [VD_AGENT_REPLY] = "reply", > + [VD_AGENT_CLIPBOARD] = "clipboard", > + [VD_AGENT_DISPLAY_CONFIG] = "display-config", > + [VD_AGENT_ANNOUNCE_CAPABILITIES] = "announce-capabilities", > + [VD_AGENT_CLIPBOARD_GRAB] = "clipboard-grab", > + [VD_AGENT_CLIPBOARD_REQUEST] = "clipboard-request", > + [VD_AGENT_CLIPBOARD_RELEASE] = "clipboard-release", > + [VD_AGENT_FILE_XFER_START] = "file-xfer-start", > + [VD_AGENT_FILE_XFER_STATUS] = "file-xfer-status", > + [VD_AGENT_FILE_XFER_DATA] = "file-xfer-data", > + [VD_AGENT_CLIENT_DISCONNECTED] = "client-disconnected", > + [VD_AGENT_MAX_CLIPBOARD] = "max-clipboard", > + [VD_AGENT_AUDIO_VOLUME_SYNC] = "audio-volume-sync", > +#if 0 > + [VD_AGENT_GRAPHICS_DEVICE_INFO] = "graphics-device-info", > +#endif > +}; > + > +#define GET_NAME(_m, _v) \ > + (((_v) < ARRAY_SIZE(_m) && (_m[_v])) ? (_m[_v]) : "???") > + > +/* ------------------------------------------------------------------ */ > +/* send messages */ > + > +static void vdagent_send_buf(VDAgentChardev *vd) > +{ > + uint32_t len; > + > + while (!buffer_empty(&vd->outbuf)) { > + len = qemu_chr_be_can_write(CHARDEV(vd)); > + if (len == 0) { > + return; > + } > + if (len > vd->outbuf.offset) { > + len = vd->outbuf.offset; > + } > + qemu_chr_be_write(CHARDEV(vd), vd->outbuf.buffer, len); > + buffer_advance(&vd->outbuf, len); > + } > +} > + > +static void vdagent_send_msg(VDAgentChardev *vd, VDAgentMessage *msg) > +{ > + uint8_t *msgbuf = (void *)msg; > + uint32_t msgsize = sizeof(VDAgentMessage) + msg->size; > + uint32_t msgoff = 0; > + VDIChunkHeader chunk; > + > + trace_vdagent_send(GET_NAME(msg_name, msg->type)); > + > + msg->protocol = VD_AGENT_PROTOCOL; > + > + if (vd->outbuf.offset + msgsize > VDAGENT_BUFFER_LIMIT) { > + error_report("buffer full, dropping message"); > + return; > + } > + > + while (msgoff < msgsize) { > + chunk.port = VDP_CLIENT_PORT; > + chunk.size = msgsize - msgoff; > + if (chunk.size > 1024) { > + chunk.size = 1024; > + } > + buffer_reserve(&vd->outbuf, sizeof(chunk) + chunk.size); > + buffer_append(&vd->outbuf, &chunk, sizeof(chunk)); > + buffer_append(&vd->outbuf, msgbuf + msgoff, chunk.size); > + msgoff += chunk.size; > + } > + vdagent_send_buf(vd); > +} > + > +static void vdagent_send_caps(VDAgentChardev *vd) > +{ > + g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) + > + > sizeof(VDAgentAnnounceCapabilities) + > + sizeof(uint32_t)); > + > + msg->type = VD_AGENT_ANNOUNCE_CAPABILITIES; > + msg->size = sizeof(VDAgentAnnounceCapabilities) + sizeof(uint32_t); > + > + vdagent_send_msg(vd, msg); > +} > + > +/* ------------------------------------------------------------------ */ > +/* chardev backend */ > + > +static void vdagent_chr_open(Chardev *chr, > + ChardevBackend *backend, > + bool *be_opened, > + Error **errp) > +{ > +#if defined(HOST_WORDS_BIGENDIAN) > + /* > + * TODO: vdagent protocol is defined to be LE, > + * so we have to byteswap everything on BE hosts. > + */ > + error_setg(errp, "vdagent is not supported on bigendian hosts"); > + return; > +#endif > + > + *be_opened = true; > +} > + > +static void vdagent_chr_recv_caps(VDAgentChardev *vd, VDAgentMessage *msg) > +{ > + VDAgentAnnounceCapabilities *caps = (void *)msg->data; > + int i; > + > + if (msg->size < (sizeof(VDAgentAnnounceCapabilities) + > + sizeof(uint32_t))) { > + return; > + } > + > + for (i = 0; i < ARRAY_SIZE(cap_name); i++) { > + if (caps->caps[0] & (1 << i)) { > + trace_vdagent_peer_cap(GET_NAME(cap_name, i)); > + } > + } > + > + vd->caps = caps->caps[0]; > + if (caps->request) { > + vdagent_send_caps(vd); > + } > +} > + > +static void vdagent_chr_recv_msg(VDAgentChardev *vd, VDAgentMessage *msg) > +{ > + trace_vdagent_recv_msg(GET_NAME(msg_name, msg->type), msg->size); > + > + switch (msg->type) { > + case VD_AGENT_ANNOUNCE_CAPABILITIES: > + vdagent_chr_recv_caps(vd, msg); > + break; > + default: > + break; > + } > +} > + > +static void vdagent_reset_xbuf(VDAgentChardev *vd) > +{ > + g_clear_pointer(&vd->xbuf, g_free); > + vd->xoff = 0; > + vd->xsize = 0; > +} > + > +static void vdagent_chr_recv_chunk(VDAgentChardev *vd) > +{ > + VDAgentMessage *msg = (void *)vd->msgbuf; > + > + if (!vd->xsize) { > + if (vd->msgsize < sizeof(*msg)) { > + error_report("%s: message too small: %d < %zd", __func__, > + vd->msgsize, sizeof(*msg)); > + return; > + } > + if (vd->msgsize == msg->size + sizeof(*msg)) { > + vdagent_chr_recv_msg(vd, msg); > + return; > + } > + } > + > + if (!vd->xsize) { > + vd->xsize = msg->size + sizeof(*msg); > + vd->xbuf = g_malloc0(vd->xsize); > + } > + > + if (vd->xoff + vd->msgsize > vd->xsize) { > + error_report("%s: Oops: %d+%d > %d", __func__, > + vd->xoff, vd->msgsize, vd->xsize); > + vdagent_reset_xbuf(vd); > + return; > + } > + > + memcpy(vd->xbuf + vd->xoff, vd->msgbuf, vd->msgsize); > + vd->xoff += vd->msgsize; > + if (vd->xoff < vd->xsize) { > + return; > + } > + > + msg = (void *)vd->xbuf; > + vdagent_chr_recv_msg(vd, msg); > + vdagent_reset_xbuf(vd); > +} > + > +static void vdagent_reset_bufs(VDAgentChardev *vd) > +{ > + memset(&vd->chunk, 0, sizeof(vd->chunk)); > + vd->chunksize = 0; > + g_free(vd->msgbuf); > + vd->msgbuf = NULL; > + vd->msgsize = 0; > +} > + > +static int vdagent_chr_write(Chardev *chr, const uint8_t *buf, int len) > +{ > + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); > + uint32_t copy, ret = len; > + > + while (len) { > + if (vd->chunksize < sizeof(vd->chunk)) { > + copy = sizeof(vd->chunk) - vd->chunksize; > + if (copy > len) { > + copy = len; > + } > + memcpy((void *)(&vd->chunk) + vd->chunksize, buf, copy); > + vd->chunksize += copy; > + buf += copy; > + len -= copy; > + if (vd->chunksize < sizeof(vd->chunk)) { > + break; > + } > + > + assert(vd->msgbuf == NULL); > + vd->msgbuf = g_malloc0(vd->chunk.size); > + } > + > + copy = vd->chunk.size - vd->msgsize; > + if (copy > len) { > + copy = len; > + } > + memcpy(vd->msgbuf + vd->msgsize, buf, copy); > + vd->msgsize += copy; > + buf += copy; > + len -= copy; > + > + if (vd->msgsize == vd->chunk.size) { > + trace_vdagent_recv_chunk(vd->chunk.size); > + vdagent_chr_recv_chunk(vd); > + vdagent_reset_bufs(vd); > + } > + } > + > + return ret; > +} > + > +static void vdagent_chr_accept_input(Chardev *chr) > +{ > + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); > + > + vdagent_send_buf(vd); > +} > + > +static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open) > +{ > + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); > + > + if (!fe_open) { > + trace_vdagent_close(); > + /* reset state */ > + vdagent_reset_bufs(vd); > + vd->caps = 0; > + return; > + } > + > + trace_vdagent_open(); > +} > + > +/* ------------------------------------------------------------------ */ > + > +static void vdagent_chr_class_init(ObjectClass *oc, void *data) > +{ > + ChardevClass *cc = CHARDEV_CLASS(oc); > + > + cc->open = vdagent_chr_open; > + cc->chr_write = vdagent_chr_write; > + cc->chr_set_fe_open = vdagent_chr_set_fe_open; > + cc->chr_accept_input = vdagent_chr_accept_input; > +} > + > +static void vdagent_chr_init(Object *obj) > +{ > + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj); > + > + buffer_init(&vd->outbuf, "vdagent-outbuf"); > +} > + > +static void vdagent_chr_fini(Object *obj) > +{ > + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj); > + > + buffer_free(&vd->outbuf); > +} > + > +static const TypeInfo vdagent_chr_type_info = { > + .name = TYPE_CHARDEV_QEMU_VDAGENT, > + .parent = TYPE_CHARDEV, > + .instance_size = sizeof(VDAgentChardev), > + .instance_init = vdagent_chr_init, > + .instance_finalize = vdagent_chr_fini, > + .class_init = vdagent_chr_class_init, > +}; > + > +static void register_types(void) > +{ > + type_register_static(&vdagent_chr_type_info); > +} > + > +type_init(register_types); > diff --git a/qapi/char.json b/qapi/char.json > index 6413970fa73b..990801e642bb 100644 > --- a/qapi/char.json > +++ b/qapi/char.json > @@ -390,12 +390,25 @@ > 'data': { '*size': 'int' }, > 'base': 'ChardevCommon' } > > +## > +# @ChardevQemuVDAgent: > +# > +# Configuration info for qemu vdagent implementation. > +# > +# Since: 6.1 > +# > +## > +{ 'struct': 'ChardevQemuVDAgent', > + 'data': { }, > + 'base': 'ChardevCommon', > + 'if': 'defined(CONFIG_SPICE_PROTOCOL)' } > + > ## > # @ChardevBackend: > # > # Configuration info for the new chardev backend. > # > -# Since: 1.4 (testdev since 2.2, wctablet since 2.9) > +# Since: 1.4 (testdev since 2.2, wctablet since 2.9, vdagent since 6.1) > ## > { 'union': 'ChardevBackend', > 'data': { 'file': 'ChardevFile', > @@ -417,6 +430,8 @@ > 'if': 'defined(CONFIG_SPICE)' }, > 'spiceport': { 'type': 'ChardevSpicePort', > 'if': 'defined(CONFIG_SPICE)' }, > + 'qemu-vdagent': { 'type': 'ChardevQemuVDAgent', > + 'if': 'defined(CONFIG_SPICE_PROTOCOL)' }, > 'vc': 'ChardevVC', > 'ringbuf': 'ChardevRingbuf', > # next one is just for compatibility > diff --git a/ui/meson.build b/ui/meson.build > index fc4fb75c2869..bad49fb6de60 100644 > --- a/ui/meson.build > +++ b/ui/meson.build > @@ -14,6 +14,7 @@ softmmu_ss.add(files( > 'qemu-pixman.c', > )) > softmmu_ss.add([spice_headers, files('spice-module.c')]) > +softmmu_ss.add(when: spice_protocol, if_true: files('vdagent.c')) > > softmmu_ss.add(when: 'CONFIG_LINUX', if_true: files('input-linux.c')) > softmmu_ss.add(when: cocoa, if_true: files('cocoa.m')) > diff --git a/ui/trace-events b/ui/trace-events > index 5d1da6f23668..c34cffb0452b 100644 > --- a/ui/trace-events > +++ b/ui/trace-events > @@ -124,3 +124,11 @@ xkeymap_extension(const char *name) "extension '%s'" > xkeymap_vendor(const char *name) "vendor '%s'" > xkeymap_keycodes(const char *name) "keycodes '%s'" > xkeymap_keymap(const char *name) "keymap '%s'" > + > +# vdagent.c > +vdagent_open(void) "" > +vdagent_close(void) "" > +vdagent_send(const char *name) "msg %s" > +vdagent_recv_chunk(uint32_t size) "size %d" > +vdagent_recv_msg(const char *name, uint32_t size) "msg %s, size %d" > +vdagent_peer_cap(const char *name) "cap %s" > -- > 2.31.1 > >
diff --git a/ui/vdagent.c b/ui/vdagent.c new file mode 100644 index 000000000000..21e55a41eaba --- /dev/null +++ b/ui/vdagent.c @@ -0,0 +1,361 @@ +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "include/qemu-common.h" +#include "chardev/char.h" +#include "qemu/buffer.h" +#include "qemu/units.h" +#include "trace.h" + +#include "qapi/qapi-types-char.h" + +#include "spice/vd_agent.h" + +#define VDAGENT_BUFFER_LIMIT (1 * MiB) + +struct VDAgentChardev { + Chardev parent; + + /* guest vdagent */ + uint32_t caps; + VDIChunkHeader chunk; + uint32_t chunksize; + uint8_t *msgbuf; + uint32_t msgsize; + uint8_t *xbuf; + uint32_t xoff, xsize; + Buffer outbuf; +}; +typedef struct VDAgentChardev VDAgentChardev; + +#define TYPE_CHARDEV_QEMU_VDAGENT "chardev-qemu-vdagent" + +DECLARE_INSTANCE_CHECKER(VDAgentChardev, QEMU_VDAGENT_CHARDEV, + TYPE_CHARDEV_QEMU_VDAGENT); + +/* ------------------------------------------------------------------ */ +/* names, for debug logging */ + +static const char *cap_name[] = { + [VD_AGENT_CAP_MOUSE_STATE] = "mouse-state", + [VD_AGENT_CAP_MONITORS_CONFIG] = "monitors-config", + [VD_AGENT_CAP_REPLY] = "reply", + [VD_AGENT_CAP_CLIPBOARD] = "clipboard", + [VD_AGENT_CAP_DISPLAY_CONFIG] = "display-config", + [VD_AGENT_CAP_CLIPBOARD_BY_DEMAND] = "clipboard-by-demand", + [VD_AGENT_CAP_CLIPBOARD_SELECTION] = "clipboard-selection", + [VD_AGENT_CAP_SPARSE_MONITORS_CONFIG] = "sparse-monitors-config", + [VD_AGENT_CAP_GUEST_LINEEND_LF] = "guest-lineend-lf", + [VD_AGENT_CAP_GUEST_LINEEND_CRLF] = "guest-lineend-crlf", + [VD_AGENT_CAP_MAX_CLIPBOARD] = "max-clipboard", + [VD_AGENT_CAP_AUDIO_VOLUME_SYNC] = "audio-volume-sync", + [VD_AGENT_CAP_MONITORS_CONFIG_POSITION] = "monitors-config-position", + [VD_AGENT_CAP_FILE_XFER_DISABLED] = "file-xfer-disabled", + [VD_AGENT_CAP_FILE_XFER_DETAILED_ERRORS] = "file-xfer-detailed-errors", +#if 0 + [VD_AGENT_CAP_GRAPHICS_DEVICE_INFO] = "graphics-device-info", + [VD_AGENT_CAP_CLIPBOARD_NO_RELEASE_ON_REGRAB] = "clipboard-no-release-on-regrab", + [VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL] = "clipboard-grab-serial", +#endif +}; + +static const char *msg_name[] = { + [VD_AGENT_MOUSE_STATE] = "mouse-state", + [VD_AGENT_MONITORS_CONFIG] = "monitors-config", + [VD_AGENT_REPLY] = "reply", + [VD_AGENT_CLIPBOARD] = "clipboard", + [VD_AGENT_DISPLAY_CONFIG] = "display-config", + [VD_AGENT_ANNOUNCE_CAPABILITIES] = "announce-capabilities", + [VD_AGENT_CLIPBOARD_GRAB] = "clipboard-grab", + [VD_AGENT_CLIPBOARD_REQUEST] = "clipboard-request", + [VD_AGENT_CLIPBOARD_RELEASE] = "clipboard-release", + [VD_AGENT_FILE_XFER_START] = "file-xfer-start", + [VD_AGENT_FILE_XFER_STATUS] = "file-xfer-status", + [VD_AGENT_FILE_XFER_DATA] = "file-xfer-data", + [VD_AGENT_CLIENT_DISCONNECTED] = "client-disconnected", + [VD_AGENT_MAX_CLIPBOARD] = "max-clipboard", + [VD_AGENT_AUDIO_VOLUME_SYNC] = "audio-volume-sync", +#if 0 + [VD_AGENT_GRAPHICS_DEVICE_INFO] = "graphics-device-info", +#endif +}; + +#define GET_NAME(_m, _v) \ + (((_v) < ARRAY_SIZE(_m) && (_m[_v])) ? (_m[_v]) : "???") + +/* ------------------------------------------------------------------ */ +/* send messages */ + +static void vdagent_send_buf(VDAgentChardev *vd) +{ + uint32_t len; + + while (!buffer_empty(&vd->outbuf)) { + len = qemu_chr_be_can_write(CHARDEV(vd)); + if (len == 0) { + return; + } + if (len > vd->outbuf.offset) { + len = vd->outbuf.offset; + } + qemu_chr_be_write(CHARDEV(vd), vd->outbuf.buffer, len); + buffer_advance(&vd->outbuf, len); + } +} + +static void vdagent_send_msg(VDAgentChardev *vd, VDAgentMessage *msg) +{ + uint8_t *msgbuf = (void *)msg; + uint32_t msgsize = sizeof(VDAgentMessage) + msg->size; + uint32_t msgoff = 0; + VDIChunkHeader chunk; + + trace_vdagent_send(GET_NAME(msg_name, msg->type)); + + msg->protocol = VD_AGENT_PROTOCOL; + + if (vd->outbuf.offset + msgsize > VDAGENT_BUFFER_LIMIT) { + error_report("buffer full, dropping message"); + return; + } + + while (msgoff < msgsize) { + chunk.port = VDP_CLIENT_PORT; + chunk.size = msgsize - msgoff; + if (chunk.size > 1024) { + chunk.size = 1024; + } + buffer_reserve(&vd->outbuf, sizeof(chunk) + chunk.size); + buffer_append(&vd->outbuf, &chunk, sizeof(chunk)); + buffer_append(&vd->outbuf, msgbuf + msgoff, chunk.size); + msgoff += chunk.size; + } + vdagent_send_buf(vd); +} + +static void vdagent_send_caps(VDAgentChardev *vd) +{ + g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) + + sizeof(VDAgentAnnounceCapabilities) + + sizeof(uint32_t)); + + msg->type = VD_AGENT_ANNOUNCE_CAPABILITIES; + msg->size = sizeof(VDAgentAnnounceCapabilities) + sizeof(uint32_t); + + vdagent_send_msg(vd, msg); +} + +/* ------------------------------------------------------------------ */ +/* chardev backend */ + +static void vdagent_chr_open(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ +#if defined(HOST_WORDS_BIGENDIAN) + /* + * TODO: vdagent protocol is defined to be LE, + * so we have to byteswap everything on BE hosts. + */ + error_setg(errp, "vdagent is not supported on bigendian hosts"); + return; +#endif + + *be_opened = true; +} + +static void vdagent_chr_recv_caps(VDAgentChardev *vd, VDAgentMessage *msg) +{ + VDAgentAnnounceCapabilities *caps = (void *)msg->data; + int i; + + if (msg->size < (sizeof(VDAgentAnnounceCapabilities) + + sizeof(uint32_t))) { + return; + } + + for (i = 0; i < ARRAY_SIZE(cap_name); i++) { + if (caps->caps[0] & (1 << i)) { + trace_vdagent_peer_cap(GET_NAME(cap_name, i)); + } + } + + vd->caps = caps->caps[0]; + if (caps->request) { + vdagent_send_caps(vd); + } +} + +static void vdagent_chr_recv_msg(VDAgentChardev *vd, VDAgentMessage *msg) +{ + trace_vdagent_recv_msg(GET_NAME(msg_name, msg->type), msg->size); + + switch (msg->type) { + case VD_AGENT_ANNOUNCE_CAPABILITIES: + vdagent_chr_recv_caps(vd, msg); + break; + default: + break; + } +} + +static void vdagent_reset_xbuf(VDAgentChardev *vd) +{ + g_clear_pointer(&vd->xbuf, g_free); + vd->xoff = 0; + vd->xsize = 0; +} + +static void vdagent_chr_recv_chunk(VDAgentChardev *vd) +{ + VDAgentMessage *msg = (void *)vd->msgbuf; + + if (!vd->xsize) { + if (vd->msgsize < sizeof(*msg)) { + error_report("%s: message too small: %d < %zd", __func__, + vd->msgsize, sizeof(*msg)); + return; + } + if (vd->msgsize == msg->size + sizeof(*msg)) { + vdagent_chr_recv_msg(vd, msg); + return; + } + } + + if (!vd->xsize) { + vd->xsize = msg->size + sizeof(*msg); + vd->xbuf = g_malloc0(vd->xsize); + } + + if (vd->xoff + vd->msgsize > vd->xsize) { + error_report("%s: Oops: %d+%d > %d", __func__, + vd->xoff, vd->msgsize, vd->xsize); + vdagent_reset_xbuf(vd); + return; + } + + memcpy(vd->xbuf + vd->xoff, vd->msgbuf, vd->msgsize); + vd->xoff += vd->msgsize; + if (vd->xoff < vd->xsize) { + return; + } + + msg = (void *)vd->xbuf; + vdagent_chr_recv_msg(vd, msg); + vdagent_reset_xbuf(vd); +} + +static void vdagent_reset_bufs(VDAgentChardev *vd) +{ + memset(&vd->chunk, 0, sizeof(vd->chunk)); + vd->chunksize = 0; + g_free(vd->msgbuf); + vd->msgbuf = NULL; + vd->msgsize = 0; +} + +static int vdagent_chr_write(Chardev *chr, const uint8_t *buf, int len) +{ + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); + uint32_t copy, ret = len; + + while (len) { + if (vd->chunksize < sizeof(vd->chunk)) { + copy = sizeof(vd->chunk) - vd->chunksize; + if (copy > len) { + copy = len; + } + memcpy((void *)(&vd->chunk) + vd->chunksize, buf, copy); + vd->chunksize += copy; + buf += copy; + len -= copy; + if (vd->chunksize < sizeof(vd->chunk)) { + break; + } + + assert(vd->msgbuf == NULL); + vd->msgbuf = g_malloc0(vd->chunk.size); + } + + copy = vd->chunk.size - vd->msgsize; + if (copy > len) { + copy = len; + } + memcpy(vd->msgbuf + vd->msgsize, buf, copy); + vd->msgsize += copy; + buf += copy; + len -= copy; + + if (vd->msgsize == vd->chunk.size) { + trace_vdagent_recv_chunk(vd->chunk.size); + vdagent_chr_recv_chunk(vd); + vdagent_reset_bufs(vd); + } + } + + return ret; +} + +static void vdagent_chr_accept_input(Chardev *chr) +{ + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); + + vdagent_send_buf(vd); +} + +static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open) +{ + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); + + if (!fe_open) { + trace_vdagent_close(); + /* reset state */ + vdagent_reset_bufs(vd); + vd->caps = 0; + return; + } + + trace_vdagent_open(); +} + +/* ------------------------------------------------------------------ */ + +static void vdagent_chr_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc = CHARDEV_CLASS(oc); + + cc->open = vdagent_chr_open; + cc->chr_write = vdagent_chr_write; + cc->chr_set_fe_open = vdagent_chr_set_fe_open; + cc->chr_accept_input = vdagent_chr_accept_input; +} + +static void vdagent_chr_init(Object *obj) +{ + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj); + + buffer_init(&vd->outbuf, "vdagent-outbuf"); +} + +static void vdagent_chr_fini(Object *obj) +{ + VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj); + + buffer_free(&vd->outbuf); +} + +static const TypeInfo vdagent_chr_type_info = { + .name = TYPE_CHARDEV_QEMU_VDAGENT, + .parent = TYPE_CHARDEV, + .instance_size = sizeof(VDAgentChardev), + .instance_init = vdagent_chr_init, + .instance_finalize = vdagent_chr_fini, + .class_init = vdagent_chr_class_init, +}; + +static void register_types(void) +{ + type_register_static(&vdagent_chr_type_info); +} + +type_init(register_types); diff --git a/qapi/char.json b/qapi/char.json index 6413970fa73b..990801e642bb 100644 --- a/qapi/char.json +++ b/qapi/char.json @@ -390,12 +390,25 @@ 'data': { '*size': 'int' }, 'base': 'ChardevCommon' } +## +# @ChardevQemuVDAgent: +# +# Configuration info for qemu vdagent implementation. +# +# Since: 6.1 +# +## +{ 'struct': 'ChardevQemuVDAgent', + 'data': { }, + 'base': 'ChardevCommon', + 'if': 'defined(CONFIG_SPICE_PROTOCOL)' } + ## # @ChardevBackend: # # Configuration info for the new chardev backend. # -# Since: 1.4 (testdev since 2.2, wctablet since 2.9) +# Since: 1.4 (testdev since 2.2, wctablet since 2.9, vdagent since 6.1) ## { 'union': 'ChardevBackend', 'data': { 'file': 'ChardevFile', @@ -417,6 +430,8 @@ 'if': 'defined(CONFIG_SPICE)' }, 'spiceport': { 'type': 'ChardevSpicePort', 'if': 'defined(CONFIG_SPICE)' }, + 'qemu-vdagent': { 'type': 'ChardevQemuVDAgent', + 'if': 'defined(CONFIG_SPICE_PROTOCOL)' }, 'vc': 'ChardevVC', 'ringbuf': 'ChardevRingbuf', # next one is just for compatibility diff --git a/ui/meson.build b/ui/meson.build index fc4fb75c2869..bad49fb6de60 100644 --- a/ui/meson.build +++ b/ui/meson.build @@ -14,6 +14,7 @@ softmmu_ss.add(files( 'qemu-pixman.c', )) softmmu_ss.add([spice_headers, files('spice-module.c')]) +softmmu_ss.add(when: spice_protocol, if_true: files('vdagent.c')) softmmu_ss.add(when: 'CONFIG_LINUX', if_true: files('input-linux.c')) softmmu_ss.add(when: cocoa, if_true: files('cocoa.m')) diff --git a/ui/trace-events b/ui/trace-events index 5d1da6f23668..c34cffb0452b 100644 --- a/ui/trace-events +++ b/ui/trace-events @@ -124,3 +124,11 @@ xkeymap_extension(const char *name) "extension '%s'" xkeymap_vendor(const char *name) "vendor '%s'" xkeymap_keycodes(const char *name) "keycodes '%s'" xkeymap_keymap(const char *name) "keymap '%s'" + +# vdagent.c +vdagent_open(void) "" +vdagent_close(void) "" +vdagent_send(const char *name) "msg %s" +vdagent_recv_chunk(uint32_t size) "size %d" +vdagent_recv_msg(const char *name, uint32_t size) "msg %s, size %d" +vdagent_peer_cap(const char *name) "cap %s"