0b663b7d77
The class kind is necessary to lookup the chardev name in qmp_chardev_add() after calling qemu_chr_new_from_opts() and to set the appropriate ChardevBackend (mainly to free the right fields). qemu_chr_new_from_opts() can be changed to use a non-qmp function using the chardev class typename. Introduce qemu_chardev_add() to be called from qemu_chr_new_from_opts() and remove the class chardev kind field. Set the backend->type in the parse callback (when non-common fields are added). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
|
|
* QEMU Char Device for testsuite control
|
|
*
|
|
* Copyright (c) 2014 Red Hat, Inc.
|
|
*
|
|
* Author: Paolo Bonzini <pbonzini@redhat.com>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
#include "qemu-common.h"
|
|
#include "sysemu/char.h"
|
|
|
|
#define BUF_SIZE 32
|
|
|
|
typedef struct {
|
|
Chardev parent;
|
|
|
|
uint8_t in_buf[32];
|
|
int in_buf_used;
|
|
} TestdevChardev;
|
|
|
|
#define TYPE_CHARDEV_TESTDEV "chardev-testdev"
|
|
#define TESTDEV_CHARDEV(obj) \
|
|
OBJECT_CHECK(TestdevChardev, (obj), TYPE_CHARDEV_TESTDEV)
|
|
|
|
/* Try to interpret a whole incoming packet */
|
|
static int testdev_eat_packet(TestdevChardev *testdev)
|
|
{
|
|
const uint8_t *cur = testdev->in_buf;
|
|
int len = testdev->in_buf_used;
|
|
uint8_t c;
|
|
int arg;
|
|
|
|
#define EAT(c) do { \
|
|
if (!len--) { \
|
|
return 0; \
|
|
} \
|
|
c = *cur++; \
|
|
} while (0)
|
|
|
|
EAT(c);
|
|
|
|
while (isspace(c)) {
|
|
EAT(c);
|
|
}
|
|
|
|
arg = 0;
|
|
while (isdigit(c)) {
|
|
arg = arg * 10 + c - '0';
|
|
EAT(c);
|
|
}
|
|
|
|
while (isspace(c)) {
|
|
EAT(c);
|
|
}
|
|
|
|
switch (c) {
|
|
case 'q':
|
|
exit((arg << 1) | 1);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return cur - testdev->in_buf;
|
|
}
|
|
|
|
/* The other end is writing some data. Store it and try to interpret */
|
|
static int testdev_chr_write(Chardev *chr, const uint8_t *buf, int len)
|
|
{
|
|
TestdevChardev *testdev = TESTDEV_CHARDEV(chr);
|
|
int tocopy, eaten, orig_len = len;
|
|
|
|
while (len) {
|
|
/* Complete our buffer as much as possible */
|
|
tocopy = MIN(len, BUF_SIZE - testdev->in_buf_used);
|
|
|
|
memcpy(testdev->in_buf + testdev->in_buf_used, buf, tocopy);
|
|
testdev->in_buf_used += tocopy;
|
|
buf += tocopy;
|
|
len -= tocopy;
|
|
|
|
/* Interpret it as much as possible */
|
|
while (testdev->in_buf_used > 0 &&
|
|
(eaten = testdev_eat_packet(testdev)) > 0) {
|
|
memmove(testdev->in_buf, testdev->in_buf + eaten,
|
|
testdev->in_buf_used - eaten);
|
|
testdev->in_buf_used -= eaten;
|
|
}
|
|
}
|
|
return orig_len;
|
|
}
|
|
|
|
static void char_testdev_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
ChardevClass *cc = CHARDEV_CLASS(oc);
|
|
|
|
cc->chr_write = testdev_chr_write;
|
|
}
|
|
|
|
static const TypeInfo char_testdev_type_info = {
|
|
.name = TYPE_CHARDEV_TESTDEV,
|
|
.parent = TYPE_CHARDEV,
|
|
.instance_size = sizeof(TestdevChardev),
|
|
.class_init = char_testdev_class_init,
|
|
};
|
|
|
|
static void register_types(void)
|
|
{
|
|
type_register_static(&char_testdev_type_info);
|
|
}
|
|
|
|
type_init(register_types);
|