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.
---
Makefile.objs | 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.objs b/Makefile.objs
index d6b3d60..d01a644 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -105,7 +105,7 @@ common-obj-$(CONFIG_BRLAPI) += baum.o
common-obj-$(CONFIG_POSIX) += migration-exec.o migration-unix.o migration-fd.o
common-obj-$(CONFIG_WIN32) += version.o
-common-obj-$(CONFIG_SPICE) += ui/spice-core.o ui/spice-input.o
ui/spice-display.o
+common-obj-$(CONFIG_SPICE) += ui/spice-core.o ui/spice-input.o
ui/spice-display.o spice-qemu-char.o
audio-obj-y = audio.o noaudio.o wavaudio.o mixeng.o
audio-obj-$(CONFIG_SDL) += sdlaudio.o
diff --git a/qemu-char.c b/qemu-char.c
index edc9ad6..acc7130 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -97,6 +97,7 @@
#endif
#include "qemu_socket.h"
+#include "ui/qemu-spice.h"
#define READ_BUF_LEN 4096
@@ -2495,6 +2496,9 @@ 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 965fa46..323d3c2 100644
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -146,6 +146,12 @@ static QemuOptsList qemu_chardev_opts = {
},{
.name = "signal",
.type = QEMU_OPT_BOOL,
+ },{
+ .name = "name",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "debug",
+ .type = QEMU_OPT_NUMBER,
},
{ /* end of list */ }
},
diff --git a/qemu-options.hx b/qemu-options.hx
index 898561d..e0b76bd 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1368,6 +1368,9 @@ DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
"-chardev parport,id=id,path=path[,mux=on|off]\n"
#endif
+#if defined(CONFIG_SPICE)
+ "-chardev spicevmc,id=id,debug=debug,name=name\n"
+#endif
, QEMU_ARCH_ALL
)
@@ -1392,7 +1395,8 @@ 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.
@@ -1568,6 +1572,16 @@ 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 ,i...@var{id} ,deb...@var{debug}, na...@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 <spice.h>
+#include <spice-experimental.h>
+
+#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 48239c3..baa951a 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;
@@ -39,6 +40,8 @@ int qemu_spice_set_pw_expire(time_t expires);
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
--
1.7.3.4
