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Thu, 30 Jul 2020 15:38:14 +0000 Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 06UFcDJV001920; Thu, 30 Jul 2020 15:38:13 GMT Received: from ca-dev63.us.oracle.com (/10.211.8.221) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 30 Jul 2020 08:38:12 -0700 From: Steve Sistare To: qemu-devel@nongnu.org Subject: [PATCH V1 24/32] ui: save/restore vnc socket fds Date: Thu, 30 Jul 2020 08:14:28 -0700 Message-Id: <1596122076-341293-25-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1596122076-341293-1-git-send-email-steven.sistare@oracle.com> References: <1596122076-341293-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9698 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxlogscore=999 mlxscore=0 suspectscore=1 bulkscore=0 malwarescore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007300111 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9698 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 bulkscore=0 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 clxscore=1015 mlxscore=0 impostorscore=0 phishscore=0 adultscore=0 suspectscore=1 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007300111 Received-SPF: pass client-ip=141.146.126.78; envelope-from=steven.sistare@oracle.com; helo=aserp2120.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/30 11:37:57 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -63 X-Spam_score: -6.4 X-Spam_bar: ------ X-Spam_report: (-6.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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: "Daniel P. Berrange" , "Michael S. Tsirkin" , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Juan Quintela , "Dr. David Alan Gilbert" , Markus Armbruster , Alex Williamson , Steve Sistare , Stefan Hajnoczi , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Mark Kanda Iterate through the VNC displays and save/restore the socket fds. Signed-off-by: Mark Kanda Signed-off-by: Steve Sistare --- include/sysemu/sysemu.h | 2 + migration/savevm.c | 3 + ui/vnc.c | 153 +++++++++++++++++++++++++++++++++++++++--------- 3 files changed, 130 insertions(+), 28 deletions(-) diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h index fa1a5c3..3e7bfee 100644 --- a/include/sysemu/sysemu.h +++ b/include/sysemu/sysemu.h @@ -28,6 +28,8 @@ void qemu_remove_machine_init_done_notifier(Notifier *notify); void save_cpr_snapshot(const char *file, const char *mode, Error **errp); void load_cpr_snapshot(const char *file, Error **errp); void save_chardev_fds(void); +void save_vnc_fds(void); +void load_vnc_fds(void); extern int autostart; diff --git a/migration/savevm.c b/migration/savevm.c index 81f38c4..35fafb7 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -2768,6 +2768,7 @@ void save_cpr_snapshot(const char *file, const char *mode, Error **errp) return; } save_chardev_fds(); + save_vnc_fds(); walkenv(FD_PREFIX, preserve_fd, 0); qemu_system_exec_request(); putenv((char *)"QEMU_START_FREEZE="); @@ -3015,6 +3016,8 @@ void load_cpr_snapshot(const char *file, Error **errp) start_on_wake = 1; } } + + load_vnc_fds(); } int load_snapshot(const char *name, Error **errp) diff --git a/ui/vnc.c b/ui/vnc.c index f006aa1..947ddf5 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -50,6 +50,7 @@ #include "qom/object_interfaces.h" #include "qemu/cutils.h" #include "io/dns-resolver.h" +#include "sysemu/sysemu.h" #define VNC_REFRESH_INTERVAL_BASE GUI_REFRESH_INTERVAL_DEFAULT #define VNC_REFRESH_INTERVAL_INC 50 @@ -2214,28 +2215,34 @@ static void set_pixel_format(VncState *vs, int bits_per_pixel, graphic_hw_update(vs->vd->dcl.con); } -static void pixel_format_message (VncState *vs) { +/* + * reuse - true if we are using an existing (already initialized) + * connection to a vnc client + */ +static void pixel_format_message(VncState *vs, bool reuse) +{ char pad[3] = { 0, 0, 0 }; vs->client_pf = qemu_default_pixelformat(32); - vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */ - vnc_write_u8(vs, vs->client_pf.depth); /* depth */ + if (!reuse) { + vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */ + vnc_write_u8(vs, vs->client_pf.depth); /* depth */ #ifdef HOST_WORDS_BIGENDIAN - vnc_write_u8(vs, 1); /* big-endian-flag */ + vnc_write_u8(vs, 1); /* big-endian-flag */ #else - vnc_write_u8(vs, 0); /* big-endian-flag */ + vnc_write_u8(vs, 0); /* big-endian-flag */ #endif - vnc_write_u8(vs, 1); /* true-color-flag */ - vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */ - vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */ - vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */ - vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */ - vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */ - vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */ - vnc_write(vs, pad, 3); /* padding */ - + vnc_write_u8(vs, 1); /* true-color-flag */ + vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */ + vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */ + vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */ + vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */ + vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */ + vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */ + vnc_write(vs, pad, 3); /* padding */ + } vnc_hextile_set_pixel_conversion(vs, 0); vs->write_pixels = vnc_write_pixels_copy; } @@ -2252,7 +2259,7 @@ static void vnc_colordepth(VncState *vs) pixman_image_get_width(vs->vd->server), pixman_image_get_height(vs->vd->server), VNC_ENCODING_WMVi); - pixel_format_message(vs); + pixel_format_message(vs, false); vnc_unlock_output(vs); vnc_flush(vs); } else { @@ -2420,7 +2427,8 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) return 0; } -static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) +static int protocol_client_init_base(VncState *vs, uint8_t *data, size_t len, + bool reuse) { char buf[1024]; VncShareMode mode; @@ -2495,10 +2503,11 @@ static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) pixman_image_get_height(vs->vd->server) >= 0); vs->client_width = pixman_image_get_width(vs->vd->server); vs->client_height = pixman_image_get_height(vs->vd->server); - vnc_write_u16(vs, vs->client_width); - vnc_write_u16(vs, vs->client_height); - - pixel_format_message(vs); + if (!reuse) { + vnc_write_u16(vs, vs->client_width); + vnc_write_u16(vs, vs->client_height); + } + pixel_format_message(vs, reuse); if (qemu_name) { size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); @@ -2509,9 +2518,11 @@ static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) size = snprintf(buf, sizeof(buf), "QEMU"); } - vnc_write_u32(vs, size); - vnc_write(vs, buf, size); - vnc_flush(vs); + if (!reuse) { + vnc_write_u32(vs, size); + vnc_write(vs, buf, size); + vnc_flush(vs); + } vnc_client_cache_auth(vs); vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED); @@ -2521,6 +2532,11 @@ static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) return 0; } +static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) +{ + return protocol_client_init_base(vs, data, len, false); +} + void start_client_init(VncState *vs) { vnc_read_when(vs, protocol_client_init, 1); @@ -3012,8 +3028,12 @@ static void vnc_refresh(DisplayChangeListener *dcl) } } +/* + * reuse - true if we are using an existing (already initialized) + * connection to a vnc client + */ static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, - bool skipauth, bool websocket) + bool skipauth, bool websocket, bool reuse) { VncState *vs = g_new0(VncState, 1); bool first_client = QTAILQ_EMPTY(&vd->clients); @@ -3109,10 +3129,15 @@ static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, graphic_hw_update(vd->dcl.con); - if (!vs->websocket) { + if ((!vs->websocket) && !reuse) { vnc_start_protocol(vs); } + if (reuse) { + uint8_t data[1] = {0}; + (void) protocol_client_init_base(vs, data, sizeof(data), true); + } + if (vd->num_connecting > vd->connections_limit) { QTAILQ_FOREACH(vs, &vd->clients, next) { if (vs->share_mode == VNC_SHARE_MODE_CONNECTING) { @@ -3143,7 +3168,7 @@ static void vnc_listen_io(QIONetListener *listener, qio_channel_set_name(QIO_CHANNEL(cioc), isWebsock ? "vnc-ws-server" : "vnc-server"); qio_channel_set_delay(QIO_CHANNEL(cioc), false); - vnc_connect(vd, cioc, false, isWebsock); + vnc_connect(vd, cioc, false, isWebsock, false); } static const DisplayChangeListenerOps dcl_ops = { @@ -3733,7 +3758,7 @@ static int vnc_display_connect(VncDisplay *vd, if (qio_channel_socket_connect_sync(sioc, saddr[0], errp) < 0) { return -1; } - vnc_connect(vd, sioc, false, false); + vnc_connect(vd, sioc, false, false, false); object_unref(OBJECT(sioc)); return 0; } @@ -4057,7 +4082,7 @@ void vnc_display_add_client(const char *id, int csock, bool skipauth) sioc = qio_channel_socket_new_fd(csock, NULL); if (sioc) { qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); - vnc_connect(vd, sioc, skipauth, false); + vnc_connect(vd, sioc, skipauth, false, false); object_unref(OBJECT(sioc)); } } @@ -4117,3 +4142,75 @@ static void vnc_register_config(void) qemu_add_opts(&qemu_vnc_opts); } opts_init(vnc_register_config); + +void save_vnc_fds(void) +{ + VncDisplay *vd; + VncState *vs; + int disp_num = 0; + char name[40]; + + QTAILQ_FOREACH(vd, &vnc_displays, next) { + QTAILQ_FOREACH(vs, &vd->clients, next) { + if (vs->sioc) { + snprintf(name, sizeof(name), "%s_%d", vs->sioc->parent.name, + disp_num); + setenv_fd(name, vs->sioc->fd); + break; + } + } + disp_num++; + } +} + +static void set_vnc_fd(char *name, QIOChannelSocket *cioc, VncDisplay *vd, + bool isWebsock) +{ + VncState *vs; + QIOChannelSocket *sioc; + + int fd = getenv_fd(name); + if (fd != -1) { + sioc = qio_channel_socket_accept(cioc, fd, NULL); + if (sioc) { + unsetenv_fd(name); + qio_channel_set_name(QIO_CHANNEL(sioc), + isWebsock ? "vnc-ws-server" : "vnc-server"); + + qio_channel_set_delay(QIO_CHANNEL(sioc), false); + vnc_connect(vd, sioc, false, isWebsock, true); + object_unref(OBJECT(sioc)); + + /* force update on all clients */ + QTAILQ_FOREACH(vs, &vd->clients, next) { + vs->update = VNC_STATE_UPDATE_FORCE; + } + } else { + error_printf("Could not restore vnc channel %s; " + "client must reconnect.\n", name); + } + } +} + +void load_vnc_fds(void) +{ + VncDisplay *vd; + QIOChannelSocket *cioc = NULL; + int disp_num = 0; + char name[40]; + + QTAILQ_FOREACH(vd, &vnc_displays, next) { + if (vd->listener) { + cioc = *vd->listener->sioc; + snprintf(name, sizeof(name), "vnc-server_%d", disp_num); + set_vnc_fd(name, cioc, vd, false); + } + + if (vd->wslistener) { + cioc = *vd->wslistener->sioc; + snprintf(name, sizeof(name), "vnc-ws-server_%d", disp_num); + set_vnc_fd(name, cioc, vd, true); + } + disp_num++; + } +} -- 1.8.3.1