/**
* Time Sync Channel message handler
*/
static void
hv_timesync_cb(void *context)
{
hv_vmbus_channel* channel;
hv_vmbus_icmsg_hdr* icmsghdrp;
uint32_t recvlen;
uint64_t requestId;
int ret;
uint8_t* time_buf;
struct hv_ictimesync_data* timedatap;
hv_timesync_sc *softc;
softc = (hv_timesync_sc*)context;
channel = softc->util_sc.hv_dev->channel;
time_buf = softc->util_sc.receive_buffer;
ret = hv_vmbus_channel_recv_packet(channel, time_buf,
PAGE_SIZE, &recvlen, &requestId);
if ((ret == 0) && recvlen > 0) {
icmsghdrp = (struct hv_vmbus_icmsg_hdr *) &time_buf[
sizeof(struct hv_vmbus_pipe_hdr)];
if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
hv_negotiate_version(icmsghdrp, NULL, time_buf);
} else {
timedatap = (struct hv_ictimesync_data *) &time_buf[
sizeof(struct hv_vmbus_pipe_hdr) +
sizeof(struct hv_vmbus_icmsg_hdr)];
hv_adj_guesttime(softc, timedatap->parenttime, timedatap->flags);
}
icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION
| HV_ICMSGHDRFLAG_RESPONSE;
hv_vmbus_channel_send_packet(channel, time_buf,
recvlen, requestId,
HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, 0);
}
}
/**
* Time Sync Channel message handler
*/
static void
hv_timesync_cb(struct vmbus_channel *channel, void *context)
{
hv_vmbus_icmsg_hdr* icmsghdrp;
uint32_t recvlen;
uint64_t requestId;
int ret;
uint8_t* time_buf;
struct hv_ictimesync_data* timedatap;
hv_timesync_sc *softc;
softc = (hv_timesync_sc*)context;
time_buf = softc->util_sc.receive_buffer;
recvlen = PAGE_SIZE;
ret = vmbus_chan_recv(channel, time_buf, &recvlen, &requestId);
KASSERT(ret != ENOBUFS, ("hvtimesync recvbuf is not large enough"));
/* XXX check recvlen to make sure that it contains enough data */
if ((ret == 0) && recvlen > 0) {
icmsghdrp = (struct hv_vmbus_icmsg_hdr *) &time_buf[
sizeof(struct hv_vmbus_pipe_hdr)];
if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
hv_negotiate_version(icmsghdrp, NULL, time_buf);
} else {
timedatap = (struct hv_ictimesync_data *) &time_buf[
sizeof(struct hv_vmbus_pipe_hdr) +
sizeof(struct hv_vmbus_icmsg_hdr)];
hv_adj_guesttime(softc, timedatap->parenttime, timedatap->flags);
}
icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION
| HV_ICMSGHDRFLAG_RESPONSE;
vmbus_chan_send(channel, VMBUS_CHANPKT_TYPE_INBAND, 0,
time_buf, recvlen, requestId);
}
}
