From 47364a91190ba1b67a4f5c5bef65a80544a60aa6 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 11 Jan 2011 13:50:32 -0200 Subject: [PATCH 44/48] spice: add chardev (v4) RH-Author: Gerd Hoffmann Message-id: <1294753832-1164-6-git-send-email-kraxel@redhat.com> Patchwork-id: 16114 O-Subject: [RHEL-6.1 kvm PATCH v2 5/5] spice: add chardev (v4) Bugzilla: 615947 631832 632458 634153 642131 647865 RH-Acked-by: Uri Lublin RH-Acked-by: Hans de Goede RH-Acked-by: Alon Levy From: Alon Levy Adding a chardev backend for spice, where spice determines what to do with it based on the name attribute given during chardev creation. For usage by spice vdagent in conjunction with a properly named virtio-serial device, and future smartcard channel usage. Example usage: qemu -device virtio-serial -chardev spicevmc,name=vdagent,id=vdagent \ -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 v3->v4: * updated commit message v1->v3 changes: (v2 had a wrong commit message) * removed spice-qemu-char.h, folded into ui/qemu-spice.h * removed dead IOCTL code * removed comment * removed ifdef CONFIG_SPICE from qemu-config.c and qemu-options.hx help. upstream: submitted (http://patchwork.ozlabs.org/patch/78153/) Signed-off-by: Gerd Hoffmann --- Makefile | 2 +- qemu-char.c | 4 + qemu-config.c | 6 ++ qemu-options.hx | 16 ++++- spice-qemu-char.c | 185 +++++++++++++++++++++++++++++++++++++++++++++++++++++ ui/qemu-spice.h | 3 + 6 files changed, 214 insertions(+), 2 deletions(-) create mode 100644 spice-qemu-char.c Signed-off-by: Luiz Capitulino --- Makefile | 2 +- qemu-char.c | 4 + qemu-config.c | 6 ++ qemu-options.hx | 16 ++++- spice-qemu-char.c | 185 +++++++++++++++++++++++++++++++++++++++++++++++++++++ ui/qemu-spice.h | 3 + 6 files changed, 214 insertions(+), 2 deletions(-) create mode 100644 spice-qemu-char.c diff --git a/Makefile b/Makefile index d91548e..ee999a6 100644 --- a/Makefile +++ b/Makefile @@ -189,7 +189,7 @@ obj-y += pflib.o obj-$(CONFIG_BRLAPI) += baum.o obj-$(CONFIG_POSIX) += migration-exec.o migration-unix.o migration-fd.o -obj-$(CONFIG_SPICE) += ui/spice-core.o ui/spice-input.o ui/spice-display.o +obj-$(CONFIG_SPICE) += ui/spice-core.o ui/spice-input.o ui/spice-display.o spice-qemu-char.o audio/audio.o audio/fmodaudio.o: QEMU_CFLAGS += $(FMOD_CFLAGS) diff --git a/qemu-char.c b/qemu-char.c index 0634117..e7ec50b 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -98,6 +98,7 @@ #endif #include "qemu_socket.h" +#include "ui/qemu-spice.h" #define READ_BUF_LEN 4096 @@ -2478,6 +2479,9 @@ static const struct { || defined(__FreeBSD_kernel__) { .name = "parport", .open = qemu_chr_open_pp }, #endif +#ifdef CONFIG_SPICE + { .name = "spicevmc", .open = qemu_chr_open_spice }, +#endif }; CharDriverState *qemu_chr_open_opts(QemuOpts *opts, diff --git a/qemu-config.c b/qemu-config.c index c58df74..ab3a853 100644 --- a/qemu-config.c +++ b/qemu-config.c @@ -164,6 +164,12 @@ QemuOptsList qemu_chardev_opts = { },{ .name = "signal", .type = QEMU_OPT_BOOL, + },{ + .name = "name", + .type = QEMU_OPT_STRING, + },{ + .name = "debug", + .type = QEMU_OPT_NUMBER, }, { /* end if list */ } }, diff --git a/qemu-options.hx b/qemu-options.hx index bffc1d2..fb2e0a2 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1216,6 +1216,9 @@ DEF("chardev", HAS_ARG, QEMU_OPTION_chardev, #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) "-chardev parport,id=id,path=path\n" #endif +#if defined(CONFIG_SPICE) + "-chardev spicevmc,id=id,debug=debug,name=name\n" +#endif ) STEXI @@ -1239,7 +1242,8 @@ Backend is one of: @option{stdio}, @option{braille}, @option{tty}, -@option{parport}. +@option{parport} +@option{spicevmc}. The specific backend will determine the applicable options. All devices must have an id, which can be any string up to 127 characters long. @@ -1407,6 +1411,16 @@ Connect to a local parallel port. @option{path} specifies the path to the parallel port device. @option{path} is required. +#if defined(CONFIG_SPICE) +@item -chardev spicevmc ,id=@var{id} ,debug=@var{debug}, name=@var{name} + +@option{debug} debug level for spicevmc + +@option{name} name of spice channel to connect to + +Connect to a spice virtual machine channel, such as vdiport. +#endif + @end table ETEXI diff --git a/spice-qemu-char.c b/spice-qemu-char.c new file mode 100644 index 0000000..0ffa674 --- /dev/null +++ b/spice-qemu-char.c @@ -0,0 +1,185 @@ +#include "config-host.h" +#include "ui/qemu-spice.h" +#include +#include + +#include "osdep.h" + +#define dprintf(_scd, _level, _fmt, ...) \ + do { \ + static unsigned __dprintf_counter = 0; \ + if (_scd->debug >= _level) { \ + fprintf(stderr, "scd: %3d: " _fmt, ++__dprintf_counter, ## __VA_ARGS__);\ + } \ + } while (0) + +#define VMC_MAX_HOST_WRITE 2048 + +typedef struct SpiceCharDriver { + CharDriverState* chr; + SpiceCharDeviceInstance sin; + char *subtype; + bool active; + uint8_t *buffer; + uint8_t *datapos; + ssize_t bufsize, datalen; + uint32_t debug; +} SpiceCharDriver; + +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) { + last_out = MIN(len, VMC_MAX_HOST_WRITE); + qemu_chr_read(scd->chr, p, last_out); + if (last_out > 0) { + out += last_out; + len -= last_out; + p += last_out; + } else { + break; + } + } + + dprintf(scd, 3, "%s: %lu/%zd\n", __func__, 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); + + dprintf(scd, 2, "%s: %p %d/%d/%zd\n", __func__, scd->datapos, len, bytes, 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; + } + } + return bytes; +} + +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, + .write = vmc_write, + .read = vmc_read, +}; + + +static void vmc_register_interface(SpiceCharDriver *scd) +{ + if (scd->active) { + return; + } + dprintf(scd, 1, "%s\n", __func__); + scd->sin.base.sif = &vmc_interface.base; + qemu_spice_add_interface(&scd->sin.base); + scd->active = true; +} + +static void vmc_unregister_interface(SpiceCharDriver *scd) +{ + if (!scd->active) { + return; + } + dprintf(scd, 1, "%s\n", __func__); + spice_server_remove_interface(&scd->sin.base); + scd->active = false; +} + + +static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + SpiceCharDriver *s = chr->opaque; + + dprintf(s, 2, "%s: %d\n", __func__, len); + vmc_register_interface(s); + assert(s->datalen == 0); + if (s->bufsize < len) { + s->bufsize = len; + s->buffer = qemu_realloc(s->buffer, s->bufsize); + } + memcpy(s->buffer, buf, len); + s->datapos = s->buffer; + s->datalen = len; + spice_server_char_device_wakeup(&s->sin); + return len; +} + +static void spice_chr_close(struct CharDriverState *chr) +{ + SpiceCharDriver *s = chr->opaque; + + printf("%s\n", __func__); + vmc_unregister_interface(s); + qemu_free(s); +} + +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"); +} + +CharDriverState *qemu_chr_open_spice(QemuOpts *opts) +{ + CharDriverState *chr; + SpiceCharDriver *s; + const char* name = qemu_opt_get(opts, "name"); + uint32_t debug = qemu_opt_get_number(opts, "debug", 0); + const char** psubtype = spice_server_char_device_recognized_subtypes(); + const char *subtype = NULL; + + if (name == NULL) { + fprintf(stderr, "spice-qemu-char: missing name parameter\n"); + print_allowed_subtypes(); + return NULL; + } + for(;*psubtype != NULL; ++psubtype) { + if (strcmp(name, *psubtype) == 0) { + subtype = *psubtype; + break; + } + } + if (subtype == NULL) { + fprintf(stderr, "spice-qemu-char: unsupported name\n"); + print_allowed_subtypes(); + return NULL; + } + + chr = qemu_mallocz(sizeof(CharDriverState)); + s = qemu_mallocz(sizeof(SpiceCharDriver)); + s->chr = chr; + s->debug = debug; + s->active = false; + s->sin.subtype = subtype; + chr->opaque = s; + chr->chr_write = spice_chr_write; + chr->chr_close = spice_chr_close; + + qemu_chr_generic_open(chr); + + return chr; +} diff --git a/ui/qemu-spice.h b/ui/qemu-spice.h index 05dc50a..916e5dc 100644 --- a/ui/qemu-spice.h +++ b/ui/qemu-spice.h @@ -24,6 +24,7 @@ #include "qemu-option.h" #include "qemu-config.h" +#include "qemu-char.h" extern int using_spice; @@ -41,6 +42,8 @@ int qemu_spice_migrate_info(const char *hostname, int port, int tls_port, void do_info_spice_print(Monitor *mon, const QObject *data); void do_info_spice(Monitor *mon, QObject **ret_data); +CharDriverState *qemu_chr_open_spice(QemuOpts *opts); + #else /* CONFIG_SPICE */ #define using_spice 0 -- 1.7.4.rc1.16.gd2f15e