static int rdmacm_mux_check_op_status(CharBackend *mad_chr_be)
{
RdmaCmMuxMsg msg = {};
int ret;
ret = qemu_chr_fe_read_all(mad_chr_be, (uint8_t *)&msg, sizeof(msg));
if (ret != sizeof(msg)) {
rdma_error_report("Got invalid message from mux: size %d, expecting %d",
ret, (int)sizeof(msg));
return -EIO;
}
trace_rdmacm_mux_check_op_status(msg.hdr.msg_type, msg.hdr.op_code,
msg.hdr.err_code);
if (msg.hdr.msg_type != RDMACM_MUX_MSG_TYPE_RESP) {
rdma_error_report("Got invalid message type %d", msg.hdr.msg_type);
return -EIO;
}
if (msg.hdr.err_code != RDMACM_MUX_ERR_CODE_OK) {
rdma_error_report("Operation failed in mux, error code %d",
msg.hdr.err_code);
return -EIO;
}
return 0;
}
static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg,
size_t msg_len_in, size_t msg_len_out)
{
CharBackend *dev = &tpm->ctrl_chr;
uint32_t cmd_no = cpu_to_be32(cmd);
ssize_t n = sizeof(uint32_t) + msg_len_in;
uint8_t *buf = NULL;
int ret = -1;
qemu_mutex_lock(&tpm->mutex);
buf = g_alloca(n);
memcpy(buf, &cmd_no, sizeof(cmd_no));
memcpy(buf + sizeof(cmd_no), msg, msg_len_in);
n = qemu_chr_fe_write_all(dev, buf, n);
if (n <= 0) {
goto end;
}
if (msg_len_out != 0) {
n = qemu_chr_fe_read_all(dev, msg, msg_len_out);
if (n <= 0) {
goto end;
}
}
ret = 0;
end:
qemu_mutex_unlock(&tpm->mutex);
return ret;
}
static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
{
CharDriverState *chr = dev->opaque;
uint8_t *p = (uint8_t *) msg;
int r, size = VHOST_USER_HDR_SIZE;
r = qemu_chr_fe_read_all(chr, p, size);
if (r != size) {
error_report("Failed to read msg header. Read %d instead of %d.", r,
size);
goto fail;
}
/* validate received flags */
if (msg->flags != (VHOST_USER_REPLY_MASK | VHOST_USER_VERSION)) {
error_report("Failed to read msg header."
" Flags 0x%x instead of 0x%x.", msg->flags,
VHOST_USER_REPLY_MASK | VHOST_USER_VERSION);
goto fail;
}
/* validate message size is sane */
if (msg->size > VHOST_USER_PAYLOAD_SIZE) {
error_report("Failed to read msg header."
" Size %d exceeds the maximum %zu.", msg->size,
VHOST_USER_PAYLOAD_SIZE);
goto fail;
}
if (msg->size) {
p += VHOST_USER_HDR_SIZE;
size = msg->size;
r = qemu_chr_fe_read_all(chr, p, size);
if (r != size) {
error_report("Failed to read msg payload."
" Read %d instead of %d.", r, msg->size);
goto fail;
}
}
return 0;
fail:
return -1;
}
static gboolean net_vhost_user_watch(GIOChannel *chan, GIOCondition cond,
void *opaque)
{
VhostUserState *s = opaque;
uint8_t buf[1];
/* We don't actually want to read anything, but CHR_EVENT_CLOSED will be
* raised as a side-effect of the read.
*/
qemu_chr_fe_read_all(s->chr, buf, sizeof(buf));
return FALSE;
}
static int64_t ivshmem_recv_msg(IVShmemState *s, int *pfd, Error **errp)
{
int64_t msg;
int n, ret;
n = 0;
do {
ret = qemu_chr_fe_read_all(s->server_chr, (uint8_t *)&msg + n,
sizeof(msg) - n);
if (ret < 0 && ret != -EINTR) {
error_setg_errno(errp, -ret, "read from server failed");
return INT64_MIN;
}
n += ret;
} while (n < sizeof(msg));
*pfd = qemu_chr_fe_get_msgfd(s->server_chr);
return msg;
}
static void chr_read(void *opaque, const uint8_t *buf, int size)
{
TestServer *s = opaque;
CharBackend *chr = &s->chr;
VhostUserMsg msg;
uint8_t *p = (uint8_t *) &msg;
int fd = -1;
if (s->test_fail) {
qemu_chr_fe_disconnect(chr);
/* now switch to non-failure */
s->test_fail = false;
}
if (size != VHOST_USER_HDR_SIZE) {
g_test_message("Wrong message size received %d", size);
return;
}
g_mutex_lock(&s->data_mutex);
memcpy(p, buf, VHOST_USER_HDR_SIZE);
if (msg.size) {
p += VHOST_USER_HDR_SIZE;
size = qemu_chr_fe_read_all(chr, p, msg.size);
if (size != msg.size) {
g_test_message("Wrong message size received %d != %d",
size, msg.size);
return;
}
}
switch (msg.request) {
case VHOST_USER_GET_FEATURES:
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
if (s->queues > 1) {
msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
}
if (s->test_flags >= TEST_FLAGS_BAD) {
msg.payload.u64 = 0;
s->test_flags = TEST_FLAGS_END;
}
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_SET_FEATURES:
g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
!=, 0ULL);
if (s->test_flags == TEST_FLAGS_DISCONNECT) {
qemu_chr_fe_disconnect(chr);
s->test_flags = TEST_FLAGS_BAD;
}
break;
case VHOST_USER_GET_PROTOCOL_FEATURES:
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_CROSS_ENDIAN;
if (s->queues > 1) {
msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
}
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_GET_VRING_BASE:
/* send back vring base to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.state);
msg.payload.state.num = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
assert(msg.payload.state.index < s->queues * 2);
s->rings &= ~(0x1ULL << msg.payload.state.index);
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_SET_MEM_TABLE:
/* received the mem table */
memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds,
G_N_ELEMENTS(s->fds));
/* signal the test that it can continue */
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_SET_VRING_KICK:
case VHOST_USER_SET_VRING_CALL:
/* consume the fd */
qemu_chr_fe_get_msgfds(chr, &fd, 1);
/*
* This is a non-blocking eventfd.
* The receive function forces it to be blocking,
* so revert it back to non-blocking.
*/
qemu_set_nonblock(fd);
break;
case VHOST_USER_SET_LOG_BASE:
if (s->log_fd != -1) {
close(s->log_fd);
s->log_fd = -1;
}
qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_SET_VRING_BASE:
assert(msg.payload.state.index < s->queues * 2);
s->rings |= 0x1ULL << msg.payload.state.index;
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_GET_QUEUE_NUM:
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
msg.payload.u64 = s->queues;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
default:
break;
}
g_mutex_unlock(&s->data_mutex);
}
static void chr_read(void *opaque, const uint8_t *buf, int size)
{
CharDriverState *chr = opaque;
VhostUserMsg msg;
uint8_t *p = (uint8_t *) &msg;
int fd;
if (size != VHOST_USER_HDR_SIZE) {
g_test_message("Wrong message size received %d\n", size);
return;
}
g_mutex_lock(data_mutex);
memcpy(p, buf, VHOST_USER_HDR_SIZE);
if (msg.size) {
p += VHOST_USER_HDR_SIZE;
qemu_chr_fe_read_all(chr, p, msg.size);
}
switch (msg.request) {
case VHOST_USER_GET_FEATURES:
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.u64);
msg.u64 = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_GET_VRING_BASE:
/* send back vring base to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.state);
msg.state.num = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_SET_MEM_TABLE:
/* received the mem table */
memcpy(&memory, &msg.memory, sizeof(msg.memory));
fds_num = qemu_chr_fe_get_msgfds(chr, fds, sizeof(fds) / sizeof(int));
/* signal the test that it can continue */
g_cond_signal(data_cond);
break;
case VHOST_USER_SET_VRING_KICK:
case VHOST_USER_SET_VRING_CALL:
/* consume the fd */
qemu_chr_fe_get_msgfds(chr, &fd, 1);
/*
* This is a non-blocking eventfd.
* The receive function forces it to be blocking,
* so revert it back to non-blocking.
*/
qemu_set_nonblock(fd);
break;
default:
break;
}
g_mutex_unlock(data_mutex);
}