#include "ui/qemu-spice.h"
#define READ_BUF_LEN 4096
-#define CBUFF_SIZE 65536
/***********************************************************/
/* character device */
}
/*********************************************************/
-/*CircularMemory chardev*/
+/* Ring buffer chardev */
typedef struct {
size_t size;
size_t prod;
size_t cons;
uint8_t *cbuf;
-} CirMemCharDriver;
+} RingBufCharDriver;
-static bool cirmem_chr_is_empty(const CharDriverState *chr)
+static size_t ringbuf_count(const CharDriverState *chr)
{
- const CirMemCharDriver *d = chr->opaque;
+ const RingBufCharDriver *d = chr->opaque;
- return d->cons == d->prod;
+ return d->prod - d->cons;
}
-static size_t qemu_chr_cirmem_count(const CharDriverState *chr)
+static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
- const CirMemCharDriver *d = chr->opaque;
-
- return (d->prod - d->cons);
-}
-
-static int cirmem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
-{
- CirMemCharDriver *d = chr->opaque;
+ RingBufCharDriver *d = chr->opaque;
int i;
if (!buf || (len < 0)) {
}
for (i = 0; i < len; i++ ) {
- /* Avoid writing the IAC information to the queue. */
- if ((unsigned char)buf[i] == IAC) {
- continue;
- }
-
- d->cbuf[d->prod++ % d->size] = buf[i];
- if ((d->prod - d->cons) > d->size) {
+ d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
+ if (d->prod - d->cons > d->size) {
d->cons = d->prod - d->size;
}
}
return 0;
}
-static int cirmem_chr_read(CharDriverState *chr, uint8_t *buf, int len)
+static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
{
- CirMemCharDriver *d = chr->opaque;
+ RingBufCharDriver *d = chr->opaque;
int i;
- for (i = 0; i < len && !cirmem_chr_is_empty(chr); i++) {
- buf[i] = d->cbuf[d->cons++ % d->size];
+ for (i = 0; i < len && d->cons != d->prod; i++) {
+ buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
}
return i;
}
-static void cirmem_chr_close(struct CharDriverState *chr)
+static void ringbuf_chr_close(struct CharDriverState *chr)
{
- CirMemCharDriver *d = chr->opaque;
+ RingBufCharDriver *d = chr->opaque;
g_free(d->cbuf);
g_free(d);
chr->opaque = NULL;
}
-static CharDriverState *qemu_chr_open_cirmemchr(QemuOpts *opts)
+static CharDriverState *qemu_chr_open_ringbuf(QemuOpts *opts)
{
CharDriverState *chr;
- CirMemCharDriver *d;
+ RingBufCharDriver *d;
chr = g_malloc0(sizeof(CharDriverState));
d = g_malloc(sizeof(*d));
- d->size = qemu_opt_get_number(opts, "maxcapacity", 0);
+ d->size = qemu_opt_get_size(opts, "size", 0);
if (d->size == 0) {
- d->size = CBUFF_SIZE;
+ d->size = 65536;
}
/* The size must be power of 2 */
if (d->size & (d->size - 1)) {
- fprintf(stderr, "chardev: size of memory device must be power of 2\n");
+ error_report("size of ringbuf device must be power of two");
goto fail;
}
d->cbuf = g_malloc0(d->size);
chr->opaque = d;
- chr->chr_write = cirmem_chr_write;
- chr->chr_close = cirmem_chr_close;
+ chr->chr_write = ringbuf_chr_write;
+ chr->chr_close = ringbuf_chr_close;
return chr;
return NULL;
}
-static bool qemu_is_chr(const CharDriverState *chr, const char *filename)
+static bool chr_is_ringbuf(const CharDriverState *chr)
{
- return strcmp(chr->filename, filename);
+ return chr->chr_write == ringbuf_chr_write;
}
-void qmp_memchar_write(const char *device, const char *data,
+void qmp_ringbuf_write(const char *device, const char *data,
bool has_format, enum DataFormat format,
Error **errp)
{
return;
}
- if (qemu_is_chr(chr, "memory")) {
- error_setg(errp,"%s is not memory char device", device);
+ if (!chr_is_ringbuf(chr)) {
+ error_setg(errp,"%s is not a ringbuf device", device);
return;
}
write_count = strlen(data);
}
- ret = cirmem_chr_write(chr, write_data, write_count);
+ ret = ringbuf_chr_write(chr, write_data, write_count);
if (write_data != (uint8_t *)data) {
g_free((void *)write_data);
}
}
-char *qmp_memchar_read(const char *device, int64_t size,
+char *qmp_ringbuf_read(const char *device, int64_t size,
bool has_format, enum DataFormat format,
Error **errp)
{
return NULL;
}
- if (qemu_is_chr(chr, "memory")) {
- error_setg(errp,"%s is not memory char device", device);
+ if (!chr_is_ringbuf(chr)) {
+ error_setg(errp,"%s is not a ringbuf device", device);
return NULL;
}
return NULL;
}
- count = qemu_chr_cirmem_count(chr);
+ count = ringbuf_count(chr);
size = size > count ? count : size;
- read_data = g_malloc0(size + 1);
+ read_data = g_malloc(size + 1);
- cirmem_chr_read(chr, read_data, size);
+ ringbuf_chr_read(chr, read_data, size);
if (has_format && (format == DATA_FORMAT_BASE64)) {
data = g_base64_encode(read_data, size);
g_free(read_data);
} else {
+ /*
+ * FIXME should read only complete, valid UTF-8 characters up
+ * to @size bytes. Invalid sequences should be replaced by a
+ * suitable replacement character. Except when (and only
+ * when) ring buffer lost characters since last read, initial
+ * continuation characters should be dropped.
+ */
+ read_data[size] = 0;
data = (char *)read_data;
}
qemu_opt_set(opts, "path", filename);
return opts;
}
- if (strstart(filename, "memory", &p)) {
- qemu_opt_set(opts, "backend", "memory");
- qemu_opt_set(opts, "maxcapacity", p);
- return opts;
- }
if (strstart(filename, "file:", &p)) {
qemu_opt_set(opts, "backend", "file");
qemu_opt_set(opts, "path", p);
{ .name = "udp", .open = qemu_chr_open_udp },
{ .name = "msmouse", .open = qemu_chr_open_msmouse },
{ .name = "vc", .open = text_console_init },
- { .name = "memory", .open = qemu_chr_open_cirmemchr },
+ { .name = "memory", .open = qemu_chr_open_ringbuf },
#ifdef _WIN32
{ .name = "file", .open = qemu_chr_open_win_file_out },
{ .name = "pipe", .open = qemu_chr_open_win_pipe },
int i;
if (qemu_opts_id(opts) == NULL) {
- error_setg(errp, "chardev: no id specified\n");
+ error_setg(errp, "chardev: no id specified");
goto err;
}
if (qemu_opt_get(opts, "backend") == NULL) {
- error_setg(errp, "chardev: \"%s\" missing backend\n",
+ error_setg(errp, "chardev: \"%s\" missing backend",
qemu_opts_id(opts));
goto err;
}
break;
}
if (i == ARRAY_SIZE(backend_table)) {
- error_setg(errp, "chardev: backend \"%s\" not found\n",
+ error_setg(errp, "chardev: backend \"%s\" not found",
qemu_opt_get(opts, "backend"));
goto err;
}
chr = backend_table[i].open(opts);
if (!chr) {
- error_setg(errp, "chardev: opening backend \"%s\" failed\n",
+ error_setg(errp, "chardev: opening backend \"%s\" failed",
qemu_opt_get(opts, "backend"));
goto err;
}
.name = "debug",
.type = QEMU_OPT_NUMBER,
},{
- .name = "maxcapacity",
- .type = QEMU_OPT_NUMBER,
+ .name = "size",
+ .type = QEMU_OPT_SIZE,
},
{ /* end of list */ }
},
return qemu_chr_open_win_file(out);
}
-static CharDriverState *qmp_chardev_open_port(ChardevPort *port, Error **errp)
+static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
+ Error **errp)
{
- switch (port->type) {
- case CHARDEV_PORT_KIND_SERIAL:
- return qemu_chr_open_win_path(port->device);
- default:
- error_setg(errp, "unknown chardev port (%d)", port->type);
- return NULL;
- }
+ return qemu_chr_open_win_path(serial->device);
+}
+
+static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
+ Error **errp)
+{
+ error_setg(errp, "character device backend type 'parallel' not supported");
+ return NULL;
}
#else /* WIN32 */
return qemu_chr_open_fd(in, out);
}
-static CharDriverState *qmp_chardev_open_port(ChardevPort *port, Error **errp)
+static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
+ Error **errp)
{
- switch (port->type) {
#ifdef HAVE_CHARDEV_TTY
- case CHARDEV_PORT_KIND_SERIAL:
- {
- int flags, fd;
- flags = O_RDWR;
- fd = qmp_chardev_open_file_source(port->device, flags, errp);
- if (error_is_set(errp)) {
- return NULL;
- }
- socket_set_nonblock(fd);
- return qemu_chr_open_tty_fd(fd);
+ int fd;
+
+ fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
+ if (error_is_set(errp)) {
+ return NULL;
}
+ socket_set_nonblock(fd);
+ return qemu_chr_open_tty_fd(fd);
+#else
+ error_setg(errp, "character device backend type 'serial' not supported");
+ return NULL;
#endif
+}
+
+static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
+ Error **errp)
+{
#ifdef HAVE_CHARDEV_PARPORT
- case CHARDEV_PORT_KIND_PARALLEL:
- {
- int flags, fd;
- flags = O_RDWR;
- fd = qmp_chardev_open_file_source(port->device, flags, errp);
- if (error_is_set(errp)) {
- return NULL;
- }
- return qemu_chr_open_pp_fd(fd);
- }
-#endif
- default:
- error_setg(errp, "unknown chardev port (%d)", port->type);
+ int fd;
+
+ fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
+ if (error_is_set(errp)) {
return NULL;
}
+ return qemu_chr_open_pp_fd(fd);
+#else
+ error_setg(errp, "character device backend type 'parallel' not supported");
+ return NULL;
+#endif
}
#endif /* WIN32 */
case CHARDEV_BACKEND_KIND_FILE:
chr = qmp_chardev_open_file(backend->file, errp);
break;
- case CHARDEV_BACKEND_KIND_PORT:
- chr = qmp_chardev_open_port(backend->port, errp);
+ case CHARDEV_BACKEND_KIND_SERIAL:
+ chr = qmp_chardev_open_serial(backend->serial, errp);
+ break;
+ case CHARDEV_BACKEND_KIND_PARALLEL:
+ chr = qmp_chardev_open_parallel(backend->parallel, errp);
break;
case CHARDEV_BACKEND_KIND_SOCKET:
chr = qmp_chardev_open_socket(backend->socket, errp);
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