Staging: hv: Added new hv_utils driver with shutdown as first functionality
Addition of new driver for Hyper-V called hv_utils. This driver is intended to support things like KVP, Timesync, Heartbeat etc. This first release has support for Gracefull shutdown. e.g. Select shutdown from the Hyper-V main admin screen and the Linux VM will do a gracefull shutdown. Signed-off-by: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hank Janssen
Greg Kroah-Hartman
parent
92d0127c9d
commit
c88c4e4c7a
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@ -21,6 +21,7 @@
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "osd.h"
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#include "logging.h"
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#include "VmbusPrivate.h"
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@ -666,8 +667,19 @@ void VmbusChannelClose(struct vmbus_channel *Channel)
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DPRINT_EXIT(VMBUS);
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}
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/*
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* VmbusChannelSendPacket - Send the specified buffer on the given channel
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/**
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* VmbusChannelSendPacket() - Send the specified buffer on the given channel
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* @Channel: Pointer to vmbus_channel structure.
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* @Buffer: Pointer to the buffer you want to receive the data into.
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* @BufferLen: Maximum size of what the the buffer will hold
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* @RequestId: Identifier of the request
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* @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time
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* packet etc.
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*
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* Sends data in @Buffer directly to hyper-v via the vmbus
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* This will send the data unparsed to hyper-v.
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*
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* Mainly used by Hyper-V drivers.
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*/
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int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,
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u32 BufferLen, u64 RequestId,
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@ -711,6 +723,7 @@ int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,
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return ret;
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}
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EXPORT_SYMBOL(VmbusChannelSendPacket);
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/*
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* VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer
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@ -848,10 +861,20 @@ int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel,
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return ret;
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}
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/*
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* VmbusChannelRecvPacket - Retrieve the user packet on the specified channel
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/**
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* VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel
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* @Channel: Pointer to vmbus_channel structure.
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* @Buffer: Pointer to the buffer you want to receive the data into.
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* @BufferLen: Maximum size of what the the buffer will hold
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* @BufferActualLen: The actual size of the data after it was received
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* @RequestId: Identifier of the request
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*
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* Receives directly from the hyper-v vmbus and puts the data it received
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* into Buffer. This will receive the data unparsed from hyper-v.
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*
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* Mainly used by Hyper-V drivers.
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*/
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/* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */
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int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,
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u32 BufferLen, u32 *BufferActualLen, u64 *RequestId)
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{
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@ -913,6 +936,7 @@ int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,
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return 0;
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}
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EXPORT_SYMBOL(VmbusChannelRecvPacket);
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/*
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* VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel
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@ -22,18 +22,22 @@
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include "osd.h"
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#include "logging.h"
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#include "VmbusPrivate.h"
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#include "utils.h"
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struct vmbus_channel_message_table_entry {
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enum vmbus_channel_message_type messageType;
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void (*messageHandler)(struct vmbus_channel_message_header *msg);
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};
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#define MAX_NUM_DEVICE_CLASSES_SUPPORTED 4
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#define MAX_MSG_TYPES 1
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#define MAX_NUM_DEVICE_CLASSES_SUPPORTED 5
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static const struct hv_guid
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gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = {
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gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = {
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/* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
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/* Storage - SCSI */
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{
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@ -69,8 +73,127 @@ static const struct hv_guid
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0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5
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}
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},
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/* 0E0B6031-5213-4934-818B-38D90CED39DB */
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/* Shutdown */
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{
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.data = {
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0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
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0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
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}
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},
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};
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/**
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* prep_negotiate_resp() - Create default response for Hyper-V Negotiate message
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* @icmsghdrp: Pointer to msg header structure
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* @icmsg_negotiate: Pointer to negotiate message structure
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* @buf: Raw buffer channel data
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*
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* @icmsghdrp is of type &struct icmsg_hdr.
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* @negop is of type &struct icmsg_negotiate.
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* Set up and fill in default negotiate response message. This response can
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* come from both the vmbus driver and the hv_utils driver. The current api
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* will respond properly to both Windows 2008 and Windows 2008-R2 operating
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* systems.
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*
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* Mainly used by Hyper-V drivers.
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*/
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void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
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struct icmsg_negotiate *negop,
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u8 *buf)
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{
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if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
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icmsghdrp->icmsgsize = 0x10;
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negop = (struct icmsg_negotiate *)&buf[
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sizeof(struct vmbuspipe_hdr) +
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sizeof(struct icmsg_hdr)];
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if (negop->icframe_vercnt == 2 &&
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negop->icversion_data[1].major == 3) {
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negop->icversion_data[0].major = 3;
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negop->icversion_data[0].minor = 0;
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negop->icversion_data[1].major = 3;
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negop->icversion_data[1].minor = 0;
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} else {
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negop->icversion_data[0].major = 1;
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negop->icversion_data[0].minor = 0;
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negop->icversion_data[1].major = 1;
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negop->icversion_data[1].minor = 0;
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}
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negop->icframe_vercnt = 1;
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negop->icmsg_vercnt = 1;
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}
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}
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EXPORT_SYMBOL(prep_negotiate_resp);
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/**
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* chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK
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* Hyper-V requests
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* @context: Pointer to argument structure.
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*
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* Set up the default handler for non device driver specific requests
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* from Hyper-V. This stub responds to the default negotiate messages
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* that come in for every non IDE/SCSI/Network request.
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* This behavior is normally overwritten in the hv_utils driver. That
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* driver handles requests like gracefull shutdown, heartbeats etc.
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*
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* Mainly used by Hyper-V drivers.
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*/
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void chn_cb_negotiate(void *context)
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{
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struct vmbus_channel *channel = context;
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u8 *buf;
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u32 buflen, recvlen;
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u64 requestid;
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struct icmsg_hdr *icmsghdrp;
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struct icmsg_negotiate *negop = NULL;
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buflen = PAGE_SIZE;
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buf = kmalloc(buflen, GFP_ATOMIC);
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VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
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if (recvlen > 0) {
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icmsghdrp = (struct icmsg_hdr *)&buf[
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sizeof(struct vmbuspipe_hdr)];
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prep_negotiate_resp(icmsghdrp, negop, buf);
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icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
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| ICMSGHDRFLAG_RESPONSE;
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VmbusChannelSendPacket(channel, buf,
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recvlen, requestid,
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VmbusPacketTypeDataInBand, 0);
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}
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kfree(buf);
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}
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EXPORT_SYMBOL(chn_cb_negotiate);
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/*
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* Function table used for message responses for non IDE/SCSI/Network type
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* messages. (Such as KVP/Shutdown etc)
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*/
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struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = {
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/* 0E0B6031-5213-4934-818B-38D90CED39DB */
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/* Shutdown */
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{
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.msg_type = HV_SHUTDOWN_MSG,
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.data = {
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0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
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0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
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},
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.callback = chn_cb_negotiate,
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.log_msg = "Shutdown channel functionality initialized"
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},
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};
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EXPORT_SYMBOL(hv_cb_utils);
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/*
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* AllocVmbusChannel - Allocate and initialize a vmbus channel object
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*/
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@ -132,7 +255,8 @@ void FreeVmbusChannel(struct vmbus_channel *Channel)
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}
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/*
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* VmbusChannelProcessOffer - Process the offer by creating a channel/device associated with this offer
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* VmbusChannelProcessOffer - Process the offer by creating a channel/device
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* associated with this offer
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*/
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static void VmbusChannelProcessOffer(void *context)
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{
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@ -140,6 +264,7 @@ static void VmbusChannelProcessOffer(void *context)
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struct vmbus_channel *channel;
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bool fNew = true;
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int ret;
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int cnt;
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unsigned long flags;
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DPRINT_ENTER(VMBUS);
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@ -209,6 +334,23 @@ static void VmbusChannelProcessOffer(void *context)
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* can cleanup properly
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*/
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newChannel->State = CHANNEL_OPEN_STATE;
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cnt = 0;
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while (cnt != MAX_MSG_TYPES) {
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if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType,
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&hv_cb_utils[cnt].data,
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sizeof(struct hv_guid)) == 0) {
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DPRINT_INFO(VMBUS, "%s",
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hv_cb_utils[cnt].log_msg);
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if (VmbusChannelOpen(newChannel, 2 * PAGE_SIZE,
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2 * PAGE_SIZE, NULL, 0,
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hv_cb_utils[cnt].callback,
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newChannel) == 0)
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hv_cb_utils[cnt].channel = newChannel;
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}
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cnt++;
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}
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}
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DPRINT_EXIT(VMBUS);
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}
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@ -29,4 +29,10 @@ config HYPERV_NET
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help
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Select this option to enable the Hyper-V virtual network driver.
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config HYPERV_UTILS
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tristate "Microsoft Hyper-V Utilities driver"
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default HYPERV
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help
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Select this option to enable the Hyper-V Utilities.
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endif
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@ -2,6 +2,7 @@ obj-$(CONFIG_HYPERV) += hv_vmbus.o
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obj-$(CONFIG_HYPERV_STORAGE) += hv_storvsc.o
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obj-$(CONFIG_HYPERV_BLOCK) += hv_blkvsc.o
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obj-$(CONFIG_HYPERV_NET) += hv_netvsc.o
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obj-$(CONFIG_HYPERV_UTILS) += hv_utils.o
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hv_vmbus-objs := vmbus_drv.o osd.o \
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Vmbus.o Hv.o Connection.o Channel.o \
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@ -9,3 +10,4 @@ hv_vmbus-objs := vmbus_drv.o osd.o \
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hv_storvsc-objs := storvsc_drv.o StorVsc.o
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hv_blkvsc-objs := blkvsc_drv.o BlkVsc.o
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hv_netvsc-objs := netvsc_drv.o NetVsc.o RndisFilter.o
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hv_utils-objs := hyperv_utils.o ext_utils.o
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@ -22,6 +22,7 @@
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*/
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#ifndef _VMBUSPACKETFORMAT_H_
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#define _VMBUSPACKETFORMAT_H_
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struct vmpacket_descriptor {
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u16 Type;
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@ -0,0 +1,27 @@
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/*
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* Copyright (c) 2010, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/reboot.h>
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#include "utils.h"
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void shutdown_linux_system()
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{
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orderly_poweroff(false);
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}
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@ -0,0 +1,134 @@
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/*
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* Copyright (c) 2010, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/sysctl.h>
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#include <linux/version.h>
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#include "logging.h"
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#include "osd.h"
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#include "vmbus.h"
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#include "VmbusPacketFormat.h"
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#include "VmbusChannelInterface.h"
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#include "VersionInfo.h"
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#include "Channel.h"
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#include "VmbusPrivate.h"
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#include "VmbusApi.h"
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#include "utils.h"
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void shutdown_onchannelcallback(void *context)
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{
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struct vmbus_channel *channel = context;
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u8 *buf;
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u32 buflen, recvlen;
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u64 requestid;
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u8 execute_shutdown = false;
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struct shutdown_msg_data *shutdown_msg;
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struct icmsg_hdr *icmsghdrp;
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struct icmsg_negotiate *negop = NULL;
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DPRINT_ENTER(VMBUS);
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buflen = PAGE_SIZE;
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buf = kmalloc(buflen, GFP_ATOMIC);
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VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
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if (recvlen > 0) {
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DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld",
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recvlen, requestid);
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icmsghdrp = (struct icmsg_hdr *)&buf[
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sizeof(struct vmbuspipe_hdr)];
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if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
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prep_negotiate_resp(icmsghdrp, negop, buf);
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} else {
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shutdown_msg = (struct shutdown_msg_data *)&buf[
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sizeof(struct vmbuspipe_hdr) +
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sizeof(struct icmsg_hdr)];
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switch (shutdown_msg->flags) {
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case 0:
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case 1:
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icmsghdrp->status = HV_S_OK;
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execute_shutdown = true;
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DPRINT_INFO(VMBUS, "Shutdown request received -"
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" gracefull shutdown initiated");
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break;
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default:
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icmsghdrp->status = HV_E_FAIL;
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execute_shutdown = false;
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DPRINT_INFO(VMBUS, "Shutdown request received -"
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" Invalid request");
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break;
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};
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}
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icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
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| ICMSGHDRFLAG_RESPONSE;
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VmbusChannelSendPacket(channel, buf,
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recvlen, requestid,
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VmbusPacketTypeDataInBand, 0);
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}
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kfree(buf);
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DPRINT_EXIT(VMBUS);
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if (execute_shutdown == true)
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shutdown_linux_system();
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}
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static int __init init_hyperv_utils(void)
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{
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printk(KERN_INFO "Registering HyperV Utility Driver\n");
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hv_cb_utils[HV_SHUTDOWN_MSG].channel->OnChannelCallback =
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&shutdown_onchannelcallback;
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hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback;
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|
||||
return 0;
|
||||
}
|
||||
|
||||
static void exit_hyperv_utils(void)
|
||||
{
|
||||
printk(KERN_INFO "De-Registered HyperV Utility Driver\n");
|
||||
|
||||
hv_cb_utils[HV_SHUTDOWN_MSG].channel->OnChannelCallback =
|
||||
&chn_cb_negotiate;
|
||||
hv_cb_utils[HV_SHUTDOWN_MSG].callback = &chn_cb_negotiate;
|
||||
}
|
||||
|
||||
module_init(init_hyperv_utils);
|
||||
module_exit(exit_hyperv_utils);
|
||||
|
||||
MODULE_DESCRIPTION("Hyper-V Utilities");
|
||||
MODULE_VERSION(HV_DRV_VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,94 @@
|
|||
/*
|
||||
* Copyright (c) 2009, Microsoft Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along with
|
||||
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
||||
* Place - Suite 330, Boston, MA 02111-1307 USA.
|
||||
*
|
||||
* Authors:
|
||||
* Haiyang Zhang <haiyangz@microsoft.com>
|
||||
* Hank Janssen <hjanssen@microsoft.com>
|
||||
*/
|
||||
#ifndef _UTILS_H_
|
||||
#define _UTILS_H_
|
||||
|
||||
/*
|
||||
* Common header for Hyper-V ICs
|
||||
*/
|
||||
#define ICMSGTYPE_NEGOTIATE 0
|
||||
#define ICMSGTYPE_HEARTBEAT 1
|
||||
#define ICMSGTYPE_KVPEXCHANGE 2
|
||||
#define ICMSGTYPE_SHUTDOWN 3
|
||||
#define ICMSGTYPE_TIMESYNC 4
|
||||
#define ICMSGTYPE_VSS 5
|
||||
|
||||
#define ICMSGHDRFLAG_TRANSACTION 1
|
||||
#define ICMSGHDRFLAG_REQUEST 2
|
||||
#define ICMSGHDRFLAG_RESPONSE 4
|
||||
|
||||
#define HV_S_OK 0x00000000
|
||||
#define HV_E_FAIL 0x80004005
|
||||
#define HV_ERROR_NOT_SUPPORTED 0x80070032
|
||||
#define HV_ERROR_MACHINE_LOCKED 0x800704F7
|
||||
|
||||
struct vmbuspipe_hdr {
|
||||
u32 flags;
|
||||
u32 msgsize;
|
||||
} __attribute__((packed));
|
||||
|
||||
struct ic_version {
|
||||
u16 major;
|
||||
u16 minor;
|
||||
} __attribute__((packed));
|
||||
|
||||
struct icmsg_hdr {
|
||||
struct ic_version icverframe;
|
||||
u16 icmsgtype;
|
||||
struct ic_version icvermsg;
|
||||
u16 icmsgsize;
|
||||
u32 status;
|
||||
u8 ictransaction_id;
|
||||
u8 icflags;
|
||||
u8 reserved[2];
|
||||
} __attribute__((packed));
|
||||
|
||||
struct icmsg_negotiate {
|
||||
u16 icframe_vercnt;
|
||||
u16 icmsg_vercnt;
|
||||
u32 reserved;
|
||||
struct ic_version icversion_data[1]; /* any size array */
|
||||
} __attribute__((packed));
|
||||
|
||||
struct shutdown_msg_data {
|
||||
u32 reason_code;
|
||||
u32 timeout_seconds;
|
||||
u32 flags;
|
||||
u8 display_message[2048];
|
||||
} __attribute__((packed));
|
||||
|
||||
#define HV_SHUTDOWN_MSG 0
|
||||
|
||||
struct hyperv_service_callback {
|
||||
u8 msg_type;
|
||||
char *log_msg;
|
||||
unsigned char data[16];
|
||||
struct vmbus_channel *channel;
|
||||
void (*callback) (void *context);
|
||||
};
|
||||
|
||||
extern void prep_negotiate_resp(struct icmsg_hdr *,
|
||||
struct icmsg_negotiate *, u8 *);
|
||||
extern void shutdown_linux_system(void);
|
||||
extern void chn_cb_negotiate(void *);
|
||||
extern struct hyperv_service_callback hv_cb_utils[];
|
||||
|
||||
#endif /* _UTILS_H_ */
|
||||
Loading…
Reference in New Issue