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/*
*
* 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>
*
*/
#include "include/osd.h"
#include "include/logging.h"
#include "VmbusPrivate.h"
//
// Defines
//
//
// Data types
//
typedef void (*PFN_CHANNEL_MESSAGE_HANDLER)(VMBUS_CHANNEL_MESSAGE_HEADER* msg);
typedef struct _VMBUS_CHANNEL_MESSAGE_TABLE_ENTRY {
VMBUS_CHANNEL_MESSAGE_TYPE messageType;
PFN_CHANNEL_MESSAGE_HANDLER messageHandler;
} VMBUS_CHANNEL_MESSAGE_TABLE_ENTRY;
//
// Internal routines
//
static void
VmbusChannelOnOffer(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelOnOpenResult(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelOnOfferRescind(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelOnGpadlCreated(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelOnGpadlTorndown(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelOnOffersDelivered(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelOnVersionResponse(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
);
static void
VmbusChannelProcessOffer(
PVOID context
);
static void
VmbusChannelProcessRescindOffer(
PVOID context
);
//
// Globals
//
#define MAX_NUM_DEVICE_CLASSES_SUPPORTED 4
const GUID gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED]= {
//{ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
{.Data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f}},// Storage - SCSI
//{F8615163-DF3E-46c5-913F-F2D2F965ED0E}
{.Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E}}, // Network
//{CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A}
{.Data = {0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A}}, // Input
//{32412632-86cb-44a2-9b5c-50d1417354f5}
{.Data = {0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5}}, // IDE
};
// Channel message dispatch table
VMBUS_CHANNEL_MESSAGE_TABLE_ENTRY gChannelMessageTable[ChannelMessageCount]= {
{ChannelMessageInvalid, NULL},
{ChannelMessageOfferChannel, VmbusChannelOnOffer},
{ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind},
{ChannelMessageRequestOffers, NULL},
{ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered},
{ChannelMessageOpenChannel, NULL},
{ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult},
{ChannelMessageCloseChannel, NULL},
{ChannelMessageGpadlHeader, NULL},
{ChannelMessageGpadlBody, NULL},
{ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated},
{ChannelMessageGpadlTeardown, NULL},
{ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown},
{ChannelMessageRelIdReleased, NULL},
{ChannelMessageInitiateContact, NULL},
{ChannelMessageVersionResponse, VmbusChannelOnVersionResponse},
{ChannelMessageUnload, NULL},
};
/*++
Name:
AllocVmbusChannel()
Description:
Allocate and initialize a vmbus channel object
--*/
VMBUS_CHANNEL* AllocVmbusChannel(void)
{
VMBUS_CHANNEL* channel;
channel = (VMBUS_CHANNEL*) MemAllocAtomic(sizeof(VMBUS_CHANNEL));
if (!channel)
{
return NULL;
}
memset(channel, 0,sizeof(VMBUS_CHANNEL));
channel->InboundLock = SpinlockCreate();
if (!channel->InboundLock)
{
MemFree(channel);
return NULL;
}
channel->PollTimer = TimerCreate(VmbusChannelOnTimer, channel);
if (!channel->PollTimer)
{
SpinlockClose(channel->InboundLock);
MemFree(channel);
return NULL;
}
//channel->dataWorkQueue = WorkQueueCreate("data");
channel->ControlWQ = WorkQueueCreate("control");
if (!channel->ControlWQ)
{
TimerClose(channel->PollTimer);
SpinlockClose(channel->InboundLock);
MemFree(channel);
return NULL;
}
return channel;
}
/*++
Name:
ReleaseVmbusChannel()
Description:
Release the vmbus channel object itself
--*/
static inline void ReleaseVmbusChannel(void* Context)
{
VMBUS_CHANNEL* channel = (VMBUS_CHANNEL*)Context;
DPRINT_ENTER(VMBUS);
DPRINT_DBG(VMBUS, "releasing channel (%p)", channel);
WorkQueueClose(channel->ControlWQ);
DPRINT_DBG(VMBUS, "channel released (%p)", channel);
MemFree(channel);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
FreeVmbusChannel()
Description:
Release the resources used by the vmbus channel object
--*/
void FreeVmbusChannel(VMBUS_CHANNEL* Channel)
{
SpinlockClose(Channel->InboundLock);
TimerClose(Channel->PollTimer);
// We have to release the channel's workqueue/thread in the vmbus's workqueue/thread context
// ie we can't destroy ourselves.
WorkQueueQueueWorkItem(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, (void*)Channel);
}
/*++
Name:
VmbusChannelProcessOffer()
Description:
Process the offer by creating a channel/device associated with this offer
--*/
static void
VmbusChannelProcessOffer(
PVOID context
)
{
int ret=0;
VMBUS_CHANNEL* newChannel=(VMBUS_CHANNEL*)context;
LIST_ENTRY* anchor;
LIST_ENTRY* curr;
BOOL fNew=TRUE;
VMBUS_CHANNEL* channel;
DPRINT_ENTER(VMBUS);
// Make sure this is a new offer
SpinlockAcquire(gVmbusConnection.ChannelLock);
ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelList)
{
channel = CONTAINING_RECORD(curr, VMBUS_CHANNEL, ListEntry);
if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, &newChannel->OfferMsg.Offer.InterfaceType,sizeof(GUID)) &&
!memcmp(&channel->OfferMsg.Offer.InterfaceInstance, &newChannel->OfferMsg.Offer.InterfaceInstance, sizeof(GUID)))
{
fNew = FALSE;
break;
}
}
if (fNew)
{
INSERT_TAIL_LIST(&gVmbusConnection.ChannelList, &newChannel->ListEntry);
}
SpinlockRelease(gVmbusConnection.ChannelLock);
if (!fNew)
{
DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", newChannel->OfferMsg.ChildRelId);
FreeVmbusChannel(newChannel);
DPRINT_EXIT(VMBUS);
return;
}
// Start the process of binding this offer to the driver
// We need to set the DeviceObject field before calling VmbusChildDeviceAdd()
newChannel->DeviceObject = VmbusChildDeviceCreate(
newChannel->OfferMsg.Offer.InterfaceType,
newChannel->OfferMsg.Offer.InterfaceInstance,
newChannel);
DPRINT_DBG(VMBUS, "child device object allocated - %p", newChannel->DeviceObject);
// Add the new device to the bus. This will kick off device-driver binding
// which eventually invokes the device driver's AddDevice() method.
ret = VmbusChildDeviceAdd(newChannel->DeviceObject);
if (ret != 0)
{
DPRINT_ERR(VMBUS, "unable to add child device object (relid %d)",
newChannel->OfferMsg.ChildRelId);
SpinlockAcquire(gVmbusConnection.ChannelLock);
REMOVE_ENTRY_LIST(&newChannel->ListEntry);
SpinlockRelease(gVmbusConnection.ChannelLock);
FreeVmbusChannel(newChannel);
}
else
{
// This state is used to indicate a successful open so that when we do close the channel normally,
// we can cleanup properly
newChannel->State = CHANNEL_OPEN_STATE;
}
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelProcessRescindOffer()
Description:
Rescind the offer by initiating a device removal
--*/
static void
VmbusChannelProcessRescindOffer(
PVOID context
)
{
VMBUS_CHANNEL* channel=(VMBUS_CHANNEL*)context;
DPRINT_ENTER(VMBUS);
VmbusChildDeviceRemove(channel->DeviceObject);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnOffer()
Description:
Handler for channel offers from vmbus in parent partition. We ignore all offers except
network and storage offers. For each network and storage offers, we create a channel object
and queue a work item to the channel object to process the offer synchronously
--*/
static void
VmbusChannelOnOffer(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
VMBUS_CHANNEL_OFFER_CHANNEL* offer = (VMBUS_CHANNEL_OFFER_CHANNEL*)hdr;
VMBUS_CHANNEL* newChannel;
GUID *guidType;
GUID *guidInstance;
int i;
int fSupported=0;
DPRINT_ENTER(VMBUS);
for (i=0; i<MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++)
{
if (memcmp(&offer->Offer.InterfaceType, &gSupportedDeviceClasses[i], sizeof(GUID)) == 0)
{
fSupported = 1;
break;
}
}
if (!fSupported)
{
DPRINT_DBG(VMBUS, "Ignoring channel offer notification for child relid %d", offer->ChildRelId);
DPRINT_EXIT(VMBUS);
return;
}
guidType = &offer->Offer.InterfaceType;
guidInstance = &offer->Offer.InterfaceInstance;
DPRINT_INFO(VMBUS, "Channel offer notification - child relid %d monitor id %d allocated %d, "
"type {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x} "
"instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}",
offer->ChildRelId,
offer->MonitorId,
offer->MonitorAllocated,
guidType->Data[3], guidType->Data[2], guidType->Data[1], guidType->Data[0], guidType->Data[5], guidType->Data[4], guidType->Data[7], guidType->Data[6], guidType->Data[8], guidType->Data[9], guidType->Data[10], guidType->Data[11], guidType->Data[12], guidType->Data[13], guidType->Data[14], guidType->Data[15],
guidInstance->Data[3], guidInstance->Data[2], guidInstance->Data[1], guidInstance->Data[0], guidInstance->Data[5], guidInstance->Data[4], guidInstance->Data[7], guidInstance->Data[6], guidInstance->Data[8], guidInstance->Data[9], guidInstance->Data[10], guidInstance->Data[11], guidInstance->Data[12], guidInstance->Data[13], guidInstance->Data[14], guidInstance->Data[15]);
// Allocate the channel object and save this offer.
newChannel = AllocVmbusChannel();
if (!newChannel)
{
DPRINT_ERR(VMBUS, "unable to allocate channel object");
return;
}
DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel);
memcpy(&newChannel->OfferMsg, offer, sizeof(VMBUS_CHANNEL_OFFER_CHANNEL));
newChannel->MonitorGroup = (UINT8)offer->MonitorId / 32;
newChannel->MonitorBit = (UINT8)offer->MonitorId % 32;
// TODO: Make sure the offer comes from our parent partition
WorkQueueQueueWorkItem(newChannel->ControlWQ, VmbusChannelProcessOffer, newChannel);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnOfferRescind()
Description:
Rescind offer handler. We queue a work item to process this offer
synchronously
--*/
static void
VmbusChannelOnOfferRescind(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
VMBUS_CHANNEL_RESCIND_OFFER* rescind = (VMBUS_CHANNEL_RESCIND_OFFER*)hdr;
VMBUS_CHANNEL* channel;
DPRINT_ENTER(VMBUS);
channel = GetChannelFromRelId(rescind->ChildRelId);
if (channel == NULL)
{
DPRINT_DBG(VMBUS, "channel not found for relId %d", rescind->ChildRelId);
return;
}
WorkQueueQueueWorkItem(channel->ControlWQ, VmbusChannelProcessRescindOffer, channel);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnOffersDelivered()
Description:
This is invoked when all offers have been delivered.
Nothing to do here.
--*/
static void
VmbusChannelOnOffersDelivered(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
DPRINT_ENTER(VMBUS);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnOpenResult()
Description:
Open result handler. This is invoked when we received a response
to our channel open request. Find the matching request, copy the
response and signal the requesting thread.
--*/
static void
VmbusChannelOnOpenResult(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
VMBUS_CHANNEL_OPEN_RESULT* result = (VMBUS_CHANNEL_OPEN_RESULT*)hdr;
LIST_ENTRY* anchor;
LIST_ENTRY* curr;
VMBUS_CHANNEL_MSGINFO* msgInfo;
VMBUS_CHANNEL_MESSAGE_HEADER* requestHeader;
VMBUS_CHANNEL_OPEN_CHANNEL* openMsg;
DPRINT_ENTER(VMBUS);
DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status);
// Find the open msg, copy the result and signal/unblock the wait event
SpinlockAcquire(gVmbusConnection.ChannelMsgLock);
ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList)
{
msgInfo = (VMBUS_CHANNEL_MSGINFO*) curr;
requestHeader = (VMBUS_CHANNEL_MESSAGE_HEADER*)msgInfo->Msg;
if (requestHeader->MessageType == ChannelMessageOpenChannel)
{
openMsg = (VMBUS_CHANNEL_OPEN_CHANNEL*)msgInfo->Msg;
if (openMsg->ChildRelId == result->ChildRelId &&
openMsg->OpenId == result->OpenId)
{
memcpy(&msgInfo->Response.OpenResult, result, sizeof(VMBUS_CHANNEL_OPEN_RESULT));
WaitEventSet(msgInfo->WaitEvent);
break;
}
}
}
SpinlockRelease(gVmbusConnection.ChannelMsgLock);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnGpadlCreated()
Description:
GPADL created handler. This is invoked when we received a response
to our gpadl create request. Find the matching request, copy the
response and signal the requesting thread.
--*/
static void
VmbusChannelOnGpadlCreated(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
VMBUS_CHANNEL_GPADL_CREATED *gpadlCreated = (VMBUS_CHANNEL_GPADL_CREATED*)hdr;
LIST_ENTRY *anchor;
LIST_ENTRY *curr;
VMBUS_CHANNEL_MSGINFO *msgInfo;
VMBUS_CHANNEL_MESSAGE_HEADER *requestHeader;
VMBUS_CHANNEL_GPADL_HEADER *gpadlHeader;
DPRINT_ENTER(VMBUS);
DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", gpadlCreated->CreationStatus);
// Find the establish msg, copy the result and signal/unblock the wait event
SpinlockAcquire(gVmbusConnection.ChannelMsgLock);
ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList)
{
msgInfo = (VMBUS_CHANNEL_MSGINFO*) curr;
requestHeader = (VMBUS_CHANNEL_MESSAGE_HEADER*)msgInfo->Msg;
if (requestHeader->MessageType == ChannelMessageGpadlHeader)
{
gpadlHeader = (VMBUS_CHANNEL_GPADL_HEADER*)requestHeader;
if ((gpadlCreated->ChildRelId == gpadlHeader->ChildRelId) &&
(gpadlCreated->Gpadl == gpadlHeader->Gpadl))
{
memcpy(&msgInfo->Response.GpadlCreated, gpadlCreated, sizeof(VMBUS_CHANNEL_GPADL_CREATED));
WaitEventSet(msgInfo->WaitEvent);
break;
}
}
}
SpinlockRelease(gVmbusConnection.ChannelMsgLock);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnGpadlTorndown()
Description:
GPADL torndown handler. This is invoked when we received a response
to our gpadl teardown request. Find the matching request, copy the
response and signal the requesting thread.
--*/
static void
VmbusChannelOnGpadlTorndown(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
VMBUS_CHANNEL_GPADL_TORNDOWN* gpadlTorndown = (VMBUS_CHANNEL_GPADL_TORNDOWN*)hdr;
LIST_ENTRY* anchor;
LIST_ENTRY* curr;
VMBUS_CHANNEL_MSGINFO* msgInfo;
VMBUS_CHANNEL_MESSAGE_HEADER *requestHeader;
VMBUS_CHANNEL_GPADL_TEARDOWN *gpadlTeardown;
DPRINT_ENTER(VMBUS);
// Find the open msg, copy the result and signal/unblock the wait event
SpinlockAcquire(gVmbusConnection.ChannelMsgLock);
ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList)
{
msgInfo = (VMBUS_CHANNEL_MSGINFO*) curr;
requestHeader = (VMBUS_CHANNEL_MESSAGE_HEADER*)msgInfo->Msg;
if (requestHeader->MessageType == ChannelMessageGpadlTeardown)
{
gpadlTeardown = (VMBUS_CHANNEL_GPADL_TEARDOWN*)requestHeader;
if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl)
{
memcpy(&msgInfo->Response.GpadlTorndown, gpadlTorndown, sizeof(VMBUS_CHANNEL_GPADL_TORNDOWN));
WaitEventSet(msgInfo->WaitEvent);
break;
}
}
}
SpinlockRelease(gVmbusConnection.ChannelMsgLock);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelOnVersionResponse()
Description:
Version response handler. This is invoked when we received a response
to our initiate contact request. Find the matching request, copy the
response and signal the requesting thread.
--*/
static void
VmbusChannelOnVersionResponse(
PVMBUS_CHANNEL_MESSAGE_HEADER hdr
)
{
LIST_ENTRY* anchor;
LIST_ENTRY* curr;
VMBUS_CHANNEL_MSGINFO *msgInfo;
VMBUS_CHANNEL_MESSAGE_HEADER *requestHeader;
VMBUS_CHANNEL_INITIATE_CONTACT *initiate;
VMBUS_CHANNEL_VERSION_RESPONSE *versionResponse = (VMBUS_CHANNEL_VERSION_RESPONSE*)hdr;
DPRINT_ENTER(VMBUS);
SpinlockAcquire(gVmbusConnection.ChannelMsgLock);
ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList)
{
msgInfo = (VMBUS_CHANNEL_MSGINFO*) curr;
requestHeader = (VMBUS_CHANNEL_MESSAGE_HEADER*)msgInfo->Msg;
if (requestHeader->MessageType == ChannelMessageInitiateContact)
{
initiate = (VMBUS_CHANNEL_INITIATE_CONTACT*)requestHeader;
memcpy(&msgInfo->Response.VersionResponse, versionResponse, sizeof(VMBUS_CHANNEL_VERSION_RESPONSE));
WaitEventSet(msgInfo->WaitEvent);
}
}
SpinlockRelease(gVmbusConnection.ChannelMsgLock);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusOnChannelMessage()
Description:
Handler for channel protocol messages.
This is invoked in the vmbus worker thread context.
--*/
VOID
VmbusOnChannelMessage(
void *Context
)
{
HV_MESSAGE *msg=(HV_MESSAGE*)Context;
VMBUS_CHANNEL_MESSAGE_HEADER* hdr;
int size;
DPRINT_ENTER(VMBUS);
hdr = (VMBUS_CHANNEL_MESSAGE_HEADER*)msg->u.Payload;
size=msg->Header.PayloadSize;
DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size);
if (hdr->MessageType >= ChannelMessageCount)
{
DPRINT_ERR(VMBUS, "Received invalid channel message type %d size %d", hdr->MessageType, size);
PrintBytes((unsigned char *)msg->u.Payload, size);
MemFree(msg);
return;
}
if (gChannelMessageTable[hdr->MessageType].messageHandler)
{
gChannelMessageTable[hdr->MessageType].messageHandler(hdr);
}
else
{
DPRINT_ERR(VMBUS, "Unhandled channel message type %d", hdr->MessageType);
}
// Free the msg that was allocated in VmbusOnMsgDPC()
MemFree(msg);
DPRINT_EXIT(VMBUS);
}
/*++
Name:
VmbusChannelRequestOffers()
Description:
Send a request to get all our pending offers.
--*/
int
VmbusChannelRequestOffers(
VOID
)
{
int ret=0;
VMBUS_CHANNEL_MESSAGE_HEADER* msg;
VMBUS_CHANNEL_MSGINFO* msgInfo;
DPRINT_ENTER(VMBUS);
msgInfo =
(VMBUS_CHANNEL_MSGINFO*)MemAlloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_MESSAGE_HEADER));
ASSERT(msgInfo != NULL);
msgInfo->WaitEvent = WaitEventCreate();
msg = (VMBUS_CHANNEL_MESSAGE_HEADER*)msgInfo->Msg;
msg->MessageType = ChannelMessageRequestOffers;
/*SpinlockAcquire(gVmbusConnection.channelMsgLock);
INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, &msgInfo->msgListEntry);
SpinlockRelease(gVmbusConnection.channelMsgLock);*/
ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_MESSAGE_HEADER));
if (ret != 0)
{
DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret);
/*SpinlockAcquire(gVmbusConnection.channelMsgLock);
REMOVE_ENTRY_LIST(&msgInfo->msgListEntry);
SpinlockRelease(gVmbusConnection.channelMsgLock);*/
goto Cleanup;
}
//WaitEventWait(msgInfo->waitEvent);
/*SpinlockAcquire(gVmbusConnection.channelMsgLock);
REMOVE_ENTRY_LIST(&msgInfo->msgListEntry);
SpinlockRelease(gVmbusConnection.channelMsgLock);*/
Cleanup:
if (msgInfo)
{
WaitEventClose(msgInfo->WaitEvent);
MemFree(msgInfo);
}
DPRINT_EXIT(VMBUS);
return ret;
}
/*++
Name:
VmbusChannelReleaseUnattachedChannels()
Description:
Release channels that are unattached/unconnected ie (no drivers associated)
--*/
void
VmbusChannelReleaseUnattachedChannels(
VOID
)
{
LIST_ENTRY *entry;
VMBUS_CHANNEL *channel;
VMBUS_CHANNEL *start=NULL;
SpinlockAcquire(gVmbusConnection.ChannelLock);
while (!IsListEmpty(&gVmbusConnection.ChannelList))
{
entry = TOP_LIST_ENTRY(&gVmbusConnection.ChannelList);
channel = CONTAINING_RECORD(entry, VMBUS_CHANNEL, ListEntry);
if (channel == start)
break;
if (!channel->DeviceObject->Driver)
{
REMOVE_ENTRY_LIST(&channel->ListEntry);
DPRINT_INFO(VMBUS, "Releasing unattached device object %p", channel->DeviceObject);
VmbusChildDeviceRemove(channel->DeviceObject);
FreeVmbusChannel(channel);
}
else
{
if (!start)
{
start = channel;
}
}
}
SpinlockRelease(gVmbusConnection.ChannelLock);
}
// eof
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