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Wed, 19 May 2021 01:40:24 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-524-C0mx4yxKP0m0I85a_8Ewuw-1; Wed, 19 May 2021 01:40:16 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 06FBB1008545 for ; Wed, 19 May 2021 05:40:16 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-114-0.ams2.redhat.com [10.36.114.0]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 010845D720; Wed, 19 May 2021 05:40:02 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 962211800849; Wed, 19 May 2021 07:39:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1621402818; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fp5+1WaDZUFX9uRLo+ziSxOk86GIxRq6IH/h0vFc8Yo=; b=aVxZPV46HYmD44NNn4JZy8PxmQVnmztZ4u3EoPkeHRLTGlJLM1VLMr70lXoOVtXjDyj3bu qKPbLV3BDDuebFVSIWylHKqOkmkhH8x8qm8HSh2Um0IActrhXHWWRyEMZjnor9WVfIEXtL 3xnuqNltdmQBypq/gPU8AABcu7Pj4oo= X-MC-Unique: C0mx4yxKP0m0I85a_8Ewuw-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH v6 4/9] ui/vdagent: core infrastructure Date: Wed, 19 May 2021 07:39:35 +0200 Message-Id: <20210519053940.1888907-5-kraxel@redhat.com> In-Reply-To: <20210519053940.1888907-1-kraxel@redhat.com> References: <20210519053940.1888907-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.374, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Gerd Hoffmann , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Markus Armbruster Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" 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=3Dvdagent \ -device virtserialport,chardev=3Dvdagent,name=3Dcom.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 Acked-by: Markus Armbruster Reviewed-by: Marc-Andr=C3=A9 Lureau --- 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[] =3D { + [VD_AGENT_CAP_MOUSE_STATE] =3D "mouse-state", + [VD_AGENT_CAP_MONITORS_CONFIG] =3D "monitors-config", + [VD_AGENT_CAP_REPLY] =3D "reply", + [VD_AGENT_CAP_CLIPBOARD] =3D "clipboard", + [VD_AGENT_CAP_DISPLAY_CONFIG] =3D "display-config", + [VD_AGENT_CAP_CLIPBOARD_BY_DEMAND] =3D "clipboard-by-demand= ", + [VD_AGENT_CAP_CLIPBOARD_SELECTION] =3D "clipboard-selection= ", + [VD_AGENT_CAP_SPARSE_MONITORS_CONFIG] =3D "sparse-monitors-con= fig", + [VD_AGENT_CAP_GUEST_LINEEND_LF] =3D "guest-lineend-lf", + [VD_AGENT_CAP_GUEST_LINEEND_CRLF] =3D "guest-lineend-crlf", + [VD_AGENT_CAP_MAX_CLIPBOARD] =3D "max-clipboard", + [VD_AGENT_CAP_AUDIO_VOLUME_SYNC] =3D "audio-volume-sync", + [VD_AGENT_CAP_MONITORS_CONFIG_POSITION] =3D "monitors-config-pos= ition", + [VD_AGENT_CAP_FILE_XFER_DISABLED] =3D "file-xfer-disabled", + [VD_AGENT_CAP_FILE_XFER_DETAILED_ERRORS] =3D "file-xfer-detailed-= errors", +#if 0 + [VD_AGENT_CAP_GRAPHICS_DEVICE_INFO] =3D "graphics-device-inf= o", + [VD_AGENT_CAP_CLIPBOARD_NO_RELEASE_ON_REGRAB] =3D "clipboard-no-releas= e-on-regrab", + [VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL] =3D "clipboard-grab-seri= al", +#endif +}; + +static const char *msg_name[] =3D { + [VD_AGENT_MOUSE_STATE] =3D "mouse-state", + [VD_AGENT_MONITORS_CONFIG] =3D "monitors-config", + [VD_AGENT_REPLY] =3D "reply", + [VD_AGENT_CLIPBOARD] =3D "clipboard", + [VD_AGENT_DISPLAY_CONFIG] =3D "display-config", + [VD_AGENT_ANNOUNCE_CAPABILITIES] =3D "announce-capabilities", + [VD_AGENT_CLIPBOARD_GRAB] =3D "clipboard-grab", + [VD_AGENT_CLIPBOARD_REQUEST] =3D "clipboard-request", + [VD_AGENT_CLIPBOARD_RELEASE] =3D "clipboard-release", + [VD_AGENT_FILE_XFER_START] =3D "file-xfer-start", + [VD_AGENT_FILE_XFER_STATUS] =3D "file-xfer-status", + [VD_AGENT_FILE_XFER_DATA] =3D "file-xfer-data", + [VD_AGENT_CLIENT_DISCONNECTED] =3D "client-disconnected", + [VD_AGENT_MAX_CLIPBOARD] =3D "max-clipboard", + [VD_AGENT_AUDIO_VOLUME_SYNC] =3D "audio-volume-sync", +#if 0 + [VD_AGENT_GRAPHICS_DEVICE_INFO] =3D "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 =3D qemu_chr_be_can_write(CHARDEV(vd)); + if (len =3D=3D 0) { + return; + } + if (len > vd->outbuf.offset) { + len =3D 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 =3D (void *)msg; + uint32_t msgsize =3D sizeof(VDAgentMessage) + msg->size; + uint32_t msgoff =3D 0; + VDIChunkHeader chunk; + + trace_vdagent_send(GET_NAME(msg_name, msg->type)); + + msg->protocol =3D VD_AGENT_PROTOCOL; + + if (vd->outbuf.offset + msgsize > VDAGENT_BUFFER_LIMIT) { + error_report("buffer full, dropping message"); + return; + } + + while (msgoff < msgsize) { + chunk.port =3D VDP_CLIENT_PORT; + chunk.size =3D msgsize - msgoff; + if (chunk.size > 1024) { + chunk.size =3D 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 +=3D chunk.size; + } + vdagent_send_buf(vd); +} + +static void vdagent_send_caps(VDAgentChardev *vd) +{ + g_autofree VDAgentMessage *msg =3D g_malloc0(sizeof(VDAgentMessage) + + sizeof(VDAgentAnnounceCapab= ilities) + + sizeof(uint32_t)); + + msg->type =3D VD_AGENT_ANNOUNCE_CAPABILITIES; + msg->size =3D 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 =3D true; +} + +static void vdagent_chr_recv_caps(VDAgentChardev *vd, VDAgentMessage *msg) +{ + VDAgentAnnounceCapabilities *caps =3D (void *)msg->data; + int i; + + if (msg->size < (sizeof(VDAgentAnnounceCapabilities) + + sizeof(uint32_t))) { + return; + } + + for (i =3D 0; i < ARRAY_SIZE(cap_name); i++) { + if (caps->caps[0] & (1 << i)) { + trace_vdagent_peer_cap(GET_NAME(cap_name, i)); + } + } + + vd->caps =3D 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 =3D 0; + vd->xsize =3D 0; +} + +static void vdagent_chr_recv_chunk(VDAgentChardev *vd) +{ + VDAgentMessage *msg =3D (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 =3D=3D msg->size + sizeof(*msg)) { + vdagent_chr_recv_msg(vd, msg); + return; + } + } + + if (!vd->xsize) { + vd->xsize =3D msg->size + sizeof(*msg); + vd->xbuf =3D 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 +=3D vd->msgsize; + if (vd->xoff < vd->xsize) { + return; + } + + msg =3D (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 =3D 0; + g_free(vd->msgbuf); + vd->msgbuf =3D NULL; + vd->msgsize =3D 0; +} + +static int vdagent_chr_write(Chardev *chr, const uint8_t *buf, int len) +{ + VDAgentChardev *vd =3D QEMU_VDAGENT_CHARDEV(chr); + uint32_t copy, ret =3D len; + + while (len) { + if (vd->chunksize < sizeof(vd->chunk)) { + copy =3D sizeof(vd->chunk) - vd->chunksize; + if (copy > len) { + copy =3D len; + } + memcpy((void *)(&vd->chunk) + vd->chunksize, buf, copy); + vd->chunksize +=3D copy; + buf +=3D copy; + len -=3D copy; + if (vd->chunksize < sizeof(vd->chunk)) { + break; + } + + assert(vd->msgbuf =3D=3D NULL); + vd->msgbuf =3D g_malloc0(vd->chunk.size); + } + + copy =3D vd->chunk.size - vd->msgsize; + if (copy > len) { + copy =3D len; + } + memcpy(vd->msgbuf + vd->msgsize, buf, copy); + vd->msgsize +=3D copy; + buf +=3D copy; + len -=3D copy; + + if (vd->msgsize =3D=3D 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 =3D QEMU_VDAGENT_CHARDEV(chr); + + vdagent_send_buf(vd); +} + +static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open) +{ + VDAgentChardev *vd =3D QEMU_VDAGENT_CHARDEV(chr); + + if (!fe_open) { + trace_vdagent_close(); + /* reset state */ + vdagent_reset_bufs(vd); + vd->caps =3D 0; + return; + } + + trace_vdagent_open(); +} + +/* ------------------------------------------------------------------ */ + +static void vdagent_chr_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc =3D CHARDEV_CLASS(oc); + + cc->open =3D vdagent_chr_open; + cc->chr_write =3D vdagent_chr_write; + cc->chr_set_fe_open =3D vdagent_chr_set_fe_open; + cc->chr_accept_input =3D vdagent_chr_accept_input; +} + +static void vdagent_chr_init(Object *obj) +{ + VDAgentChardev *vd =3D QEMU_VDAGENT_CHARDEV(obj); + + buffer_init(&vd->outbuf, "vdagent-outbuf"); +} + +static void vdagent_chr_fini(Object *obj) +{ + VDAgentChardev *vd =3D QEMU_VDAGENT_CHARDEV(obj); + + buffer_free(&vd->outbuf); +} + +static const TypeInfo vdagent_chr_type_info =3D { + .name =3D TYPE_CHARDEV_QEMU_VDAGENT, + .parent =3D TYPE_CHARDEV, + .instance_size =3D sizeof(VDAgentChardev), + .instance_init =3D vdagent_chr_init, + .instance_finalize =3D vdagent_chr_fini, + .class_init =3D 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' } =20 +## +# @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')) =20 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" --=20 2.31.1