/*
* Heartbeat functionality.
* Every two seconds, Hyper-V send us a heartbeat request message.
* we respond to this message, and Hyper-V knows we are alive.
*/
static void heartbeat_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u32 recvlen;
u64 requestid;
struct icmsg_hdr *icmsghdrp;
struct heartbeat_msg_data *heartbeat_msg;
vmbus_recvpacket(channel, hbeat_txf_buf,
PAGE_SIZE, &recvlen, &requestid);
if (recvlen > 0) {
icmsghdrp = (struct icmsg_hdr *)&hbeat_txf_buf[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, NULL, hbeat_txf_buf);
} else {
heartbeat_msg =
(struct heartbeat_msg_data *)&hbeat_txf_buf[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
heartbeat_msg->seq_num += 1;
}
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
vmbus_sendpacket(channel, hbeat_txf_buf,
recvlen, requestid,
VM_PKT_DATA_INBAND, 0);
}
}
/*
* Time Sync Channel message handler.
*/
static void timesync_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u32 recvlen;
u64 requestid;
struct icmsg_hdr *icmsghdrp;
struct ictimesync_data *timedatap;
vmbus_recvpacket(channel, time_txf_buf,
PAGE_SIZE, &recvlen, &requestid);
if (recvlen > 0) {
icmsghdrp = (struct icmsg_hdr *)&time_txf_buf[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, NULL, time_txf_buf);
} else {
timedatap = (struct ictimesync_data *)&time_txf_buf[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
adj_guesttime(timedatap->parenttime, timedatap->flags);
}
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
vmbus_sendpacket(channel, time_txf_buf,
recvlen, requestid,
VM_PKT_DATA_INBAND, 0);
}
}
static void shutdown_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u32 recvlen;
u64 requestid;
u8 execute_shutdown = false;
struct shutdown_msg_data *shutdown_msg;
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
vmbus_recvpacket(channel, shut_txf_buf,
PAGE_SIZE, &recvlen, &requestid);
if (recvlen > 0) {
DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld",
recvlen, requestid);
icmsghdrp = (struct icmsg_hdr *)&shut_txf_buf[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, negop, shut_txf_buf);
} else {
shutdown_msg =
(struct shutdown_msg_data *)&shut_txf_buf[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
switch (shutdown_msg->flags) {
case 0:
case 1:
icmsghdrp->status = HV_S_OK;
execute_shutdown = true;
DPRINT_INFO(VMBUS, "Shutdown request received -"
" gracefull shutdown initiated");
break;
default:
icmsghdrp->status = HV_E_FAIL;
execute_shutdown = false;
DPRINT_INFO(VMBUS, "Shutdown request received -"
" Invalid request");
break;
};
}
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
vmbus_sendpacket(channel, shut_txf_buf,
recvlen, requestid,
VM_PKT_DATA_INBAND, 0);
}
if (execute_shutdown == true)
orderly_poweroff(false);
}
/*
* Heartbeat functionality.
* Every two seconds, Hyper-V send us a heartbeat request message.
* we respond to this message, and Hyper-V knows we are alive.
*/
static void heartbeat_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u8 *buf;
u32 buflen, recvlen;
u64 requestid;
struct icmsg_hdr *icmsghdrp;
struct heartbeat_msg_data *heartbeat_msg;
DPRINT_ENTER(VMBUS);
buflen = PAGE_SIZE;
buf = kmalloc(buflen, GFP_ATOMIC);
VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
if (recvlen > 0) {
DPRINT_DBG(VMBUS, "heartbeat packet: len=%d, requestid=%lld",
recvlen, requestid);
icmsghdrp = (struct icmsg_hdr *)&buf[
sizeof(struct vmbuspipe_hdr)];
icmsghdrp = (struct icmsg_hdr *)&buf[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, NULL, buf);
} else {
heartbeat_msg = (struct heartbeat_msg_data *)&buf[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
DPRINT_DBG(VMBUS, "heartbeat seq = %lld",
heartbeat_msg->seq_num);
heartbeat_msg->seq_num += 1;
}
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
VmbusChannelSendPacket(channel, buf,
recvlen, requestid,
VmbusPacketTypeDataInBand, 0);
}
kfree(buf);
DPRINT_EXIT(VMBUS);
}
/*
* Time Sync Channel message handler.
*/
static void timesync_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u8 *buf;
u32 buflen, recvlen;
u64 requestid;
struct icmsg_hdr *icmsghdrp;
struct ictimesync_data *timedatap;
DPRINT_ENTER(VMBUS);
buflen = PAGE_SIZE;
buf = kmalloc(buflen, GFP_ATOMIC);
VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
if (recvlen > 0) {
DPRINT_DBG(VMBUS, "timesync packet: recvlen=%d, requestid=%lld",
recvlen, requestid);
icmsghdrp = (struct icmsg_hdr *)&buf[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, NULL, buf);
} else {
timedatap = (struct ictimesync_data *)&buf[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
adj_guesttime(timedatap->parenttime, timedatap->flags);
}
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
VmbusChannelSendPacket(channel, buf,
recvlen, requestid,
VmbusPacketTypeDataInBand, 0);
}
kfree(buf);
DPRINT_EXIT(VMBUS);
}
static void shutdown_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u8 *buf;
u32 buflen, recvlen;
u64 requestid;
u8 execute_shutdown = false;
struct shutdown_msg_data *shutdown_msg;
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
DPRINT_ENTER(VMBUS);
buflen = PAGE_SIZE;
buf = kmalloc(buflen, GFP_ATOMIC);
VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
if (recvlen > 0) {
DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld",
recvlen, requestid);
icmsghdrp = (struct icmsg_hdr *)&buf[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, negop, buf);
} else {
shutdown_msg = (struct shutdown_msg_data *)&buf[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
switch (shutdown_msg->flags) {
case 0:
case 1:
icmsghdrp->status = HV_S_OK;
execute_shutdown = true;
DPRINT_INFO(VMBUS, "Shutdown request received -"
" gracefull shutdown initiated");
break;
default:
icmsghdrp->status = HV_E_FAIL;
execute_shutdown = false;
DPRINT_INFO(VMBUS, "Shutdown request received -"
" Invalid request");
break;
};
}
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
VmbusChannelSendPacket(channel, buf,
recvlen, requestid,
VmbusPacketTypeDataInBand, 0);
}
kfree(buf);
DPRINT_EXIT(VMBUS);
if (execute_shutdown == true)
orderly_poweroff(false);
}
void hv_kvp_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
u32 recvlen;
u64 requestid;
struct hv_kvp_msg *kvp_msg;
struct hv_kvp_msg_enumerate *kvp_data;
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
if (kvp_transaction.active)
return;
vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE, &recvlen, &requestid);
if (recvlen > 0) {
icmsghdrp = (struct icmsg_hdr *)&recv_buffer[
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
prep_negotiate_resp(icmsghdrp, negop, recv_buffer);
} else {
kvp_msg = (struct hv_kvp_msg *)&recv_buffer[
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
kvp_data = &kvp_msg->kvp_data;
/*
* We only support the "get" operation on
* "KVP_POOL_AUTO" pool.
*/
if ((kvp_msg->kvp_hdr.pool != KVP_POOL_AUTO) ||
(kvp_msg->kvp_hdr.operation !=
KVP_OP_ENUMERATE)) {
icmsghdrp->status = HV_E_FAIL;
goto callback_done;
}
/*
* Stash away this global state for completing the
* transaction; note transactions are serialized.
*/
kvp_transaction.recv_len = recvlen;
kvp_transaction.recv_channel = channel;
kvp_transaction.recv_req_id = requestid;
kvp_transaction.active = true;
/*
* Get the information from the
* user-mode component.
* component. This transaction will be
* completed when we get the value from
* the user-mode component.
* Set a timeout to deal with
* user-mode not responding.
*/
kvp_send_key(kvp_data->index);
schedule_delayed_work(&kvp_work, 100);
return;
}
callback_done:
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
vmbus_sendpacket(channel, recv_buffer,
recvlen, requestid,
VM_PKT_DATA_INBAND, 0);
}
}
