/* * 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 * Hank Janssen */ #include #include #include #include #include #include #include "osd.h" #include "logging.h" #include "vmbus_private.h" #include "utils.h" struct vmbus_channel_message_table_entry { enum vmbus_channel_message_type messageType; void (*messageHandler)(struct vmbus_channel_message_header *msg); }; #define MAX_MSG_TYPES 3 #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 7 static const struct hv_guid gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ /* Storage - SCSI */ { .data = { 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f } }, /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ /* Network */ { .data = { 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E } }, /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ /* Input */ { .data = { 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A } }, /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ /* IDE */ { .data = { 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 } }, /* 0E0B6031-5213-4934-818B-38D90CED39DB */ /* Shutdown */ { .data = { 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB } }, /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ /* TimeSync */ { .data = { 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf } }, /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ /* Heartbeat */ { .data = { 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d } }, }; /** * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message * @icmsghdrp: Pointer to msg header structure * @icmsg_negotiate: Pointer to negotiate message structure * @buf: Raw buffer channel data * * @icmsghdrp is of type &struct icmsg_hdr. * @negop is of type &struct icmsg_negotiate. * Set up and fill in default negotiate response message. This response can * come from both the vmbus driver and the hv_utils driver. The current api * will respond properly to both Windows 2008 and Windows 2008-R2 operating * systems. * * Mainly used by Hyper-V drivers. */ void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, struct icmsg_negotiate *negop, u8 *buf) { if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { icmsghdrp->icmsgsize = 0x10; negop = (struct icmsg_negotiate *)&buf[ sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr)]; if (negop->icframe_vercnt == 2 && negop->icversion_data[1].major == 3) { negop->icversion_data[0].major = 3; negop->icversion_data[0].minor = 0; negop->icversion_data[1].major = 3; negop->icversion_data[1].minor = 0; } else { negop->icversion_data[0].major = 1; negop->icversion_data[0].minor = 0; negop->icversion_data[1].major = 1; negop->icversion_data[1].minor = 0; } negop->icframe_vercnt = 1; negop->icmsg_vercnt = 1; } } EXPORT_SYMBOL(prep_negotiate_resp); /** * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK * Hyper-V requests * @context: Pointer to argument structure. * * Set up the default handler for non device driver specific requests * from Hyper-V. This stub responds to the default negotiate messages * that come in for every non IDE/SCSI/Network request. * This behavior is normally overwritten in the hv_utils driver. That * driver handles requests like gracefull shutdown, heartbeats etc. * * Mainly used by Hyper-V drivers. */ void chn_cb_negotiate(void *context) { struct vmbus_channel *channel = context; u8 *buf; u32 buflen, recvlen; u64 requestid; struct icmsg_hdr *icmsghdrp; struct icmsg_negotiate *negop = NULL; buflen = PAGE_SIZE; buf = kmalloc(buflen, GFP_ATOMIC); VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid); if (recvlen > 0) { icmsghdrp = (struct icmsg_hdr *)&buf[ sizeof(struct vmbuspipe_hdr)]; prep_negotiate_resp(icmsghdrp, negop, buf); icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; VmbusChannelSendPacket(channel, buf, recvlen, requestid, VmbusPacketTypeDataInBand, 0); } kfree(buf); } EXPORT_SYMBOL(chn_cb_negotiate); /* * Function table used for message responses for non IDE/SCSI/Network type * messages. (Such as KVP/Shutdown etc) */ struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = { /* 0E0B6031-5213-4934-818B-38D90CED39DB */ /* Shutdown */ { .msg_type = HV_SHUTDOWN_MSG, .data = { 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB }, .callback = chn_cb_negotiate, .log_msg = "Shutdown channel functionality initialized" }, /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ /* TimeSync */ { .msg_type = HV_TIMESYNC_MSG, .data = { 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf }, .callback = chn_cb_negotiate, .log_msg = "Timesync channel functionality initialized" }, /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ /* Heartbeat */ { .msg_type = HV_HEARTBEAT_MSG, .data = { 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d }, .callback = chn_cb_negotiate, .log_msg = "Heartbeat channel functionality initialized" }, }; EXPORT_SYMBOL(hv_cb_utils); /* * AllocVmbusChannel - Allocate and initialize a vmbus channel object */ struct vmbus_channel *AllocVmbusChannel(void) { struct vmbus_channel *channel; channel = kzalloc(sizeof(*channel), GFP_ATOMIC); if (!channel) return NULL; spin_lock_init(&channel->inbound_lock); init_timer(&channel->poll_timer); channel->poll_timer.data = (unsigned long)channel; channel->poll_timer.function = VmbusChannelOnTimer; channel->ControlWQ = create_workqueue("hv_vmbus_ctl"); if (!channel->ControlWQ) { kfree(channel); return NULL; } return channel; } /* * ReleaseVmbusChannel - Release the vmbus channel object itself */ static inline void ReleaseVmbusChannel(void *context) { struct vmbus_channel *channel = context; DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); destroy_workqueue(channel->ControlWQ); DPRINT_DBG(VMBUS, "channel released (%p)", channel); kfree(channel); } /* * FreeVmbusChannel - Release the resources used by the vmbus channel object */ void FreeVmbusChannel(struct vmbus_channel *Channel) { del_timer_sync(&Channel->poll_timer); /* * We have to release the channel's workqueue/thread in the vmbus's * workqueue/thread context * ie we can't destroy ourselves. */ osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, Channel); } DECLARE_COMPLETION(hv_channel_ready); /* * Count initialized channels, and ensure all channels are ready when hv_vmbus * module loading completes. */ static void count_hv_channel(void) { static int counter; unsigned long flags; spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); if (++counter == MAX_MSG_TYPES) complete(&hv_channel_ready); spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); } /* * VmbusChannelProcessOffer - Process the offer by creating a channel/device * associated with this offer */ static void VmbusChannelProcessOffer(void *context) { struct vmbus_channel *newChannel = context; struct vmbus_channel *channel; bool fNew = true; int ret; int cnt; unsigned long flags; /* Make sure this is a new offer */ spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) { if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, &newChannel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)) && !memcmp(&channel->OfferMsg.Offer.InterfaceInstance, &newChannel->OfferMsg.Offer.InterfaceInstance, sizeof(struct hv_guid))) { fNew = false; break; } } if (fNew) list_add_tail(&newChannel->ListEntry, &gVmbusConnection.ChannelList); spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); if (!fNew) { DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", newChannel->OfferMsg.ChildRelId); FreeVmbusChannel(newChannel); 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); spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); list_del(&newChannel->ListEntry); spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); 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; /* Open IC channels */ for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) { if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType, &hv_cb_utils[cnt].data, sizeof(struct hv_guid)) == 0 && VmbusChannelOpen(newChannel, 2 * PAGE_SIZE, 2 * PAGE_SIZE, NULL, 0, hv_cb_utils[cnt].callback, newChannel) == 0) { hv_cb_utils[cnt].channel = newChannel; DPRINT_INFO(VMBUS, "%s", hv_cb_utils[cnt].log_msg); count_hv_channel(); } } } } /* * VmbusChannelProcessRescindOffer - Rescind the offer by initiating a device removal */ static void VmbusChannelProcessRescindOffer(void *context) { struct vmbus_channel *channel = context; VmbusChildDeviceRemove(channel->DeviceObject); } /* * VmbusChannelOnOffer - 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(struct vmbus_channel_message_header *hdr) { struct vmbus_channel_offer_channel *offer; struct vmbus_channel *newChannel; struct hv_guid *guidType; struct hv_guid *guidInstance; int i; int fSupported = 0; offer = (struct vmbus_channel_offer_channel *)hdr; for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { if (memcmp(&offer->Offer.InterfaceType, &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { fSupported = 1; break; } } if (!fSupported) { DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " "child relid %d", offer->ChildRelId); 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(struct vmbus_channel_offer_channel)); newChannel->MonitorGroup = (u8)offer->MonitorId / 32; newChannel->MonitorBit = (u8)offer->MonitorId % 32; /* TODO: Make sure the offer comes from our parent partition */ osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer, newChannel); } /* * VmbusChannelOnOfferRescind - Rescind offer handler. * * We queue a work item to process this offer synchronously */ static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr) { struct vmbus_channel_rescind_offer *rescind; struct vmbus_channel *channel; rescind = (struct vmbus_channel_rescind_offer *)hdr; channel = GetChannelFromRelId(rescind->ChildRelId); if (channel == NULL) { DPRINT_DBG(VMBUS, "channel not found for relId %d", rescind->ChildRelId); return; } osd_schedule_callback(channel->ControlWQ, VmbusChannelProcessRescindOffer, channel); } /* * VmbusChannelOnOffersDelivered - This is invoked when all offers have been delivered. * * Nothing to do here. */ static void VmbusChannelOnOffersDelivered( struct vmbus_channel_message_header *hdr) { } /* * VmbusChannelOnOpenResult - 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(struct vmbus_channel_message_header *hdr) { struct vmbus_channel_open_result *result; struct list_head *curr; struct vmbus_channel_msginfo *msgInfo; struct vmbus_channel_message_header *requestHeader; struct vmbus_channel_open_channel *openMsg; unsigned long flags; result = (struct vmbus_channel_open_result *)hdr; DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status); /* * Find the open msg, copy the result and signal/unblock the wait event */ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); list_for_each(curr, &gVmbusConnection.ChannelMsgList) { /* FIXME: this should probably use list_entry() instead */ msgInfo = (struct vmbus_channel_msginfo *)curr; requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; if (requestHeader->MessageType == ChannelMessageOpenChannel) { openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg; if (openMsg->ChildRelId == result->ChildRelId && openMsg->OpenId == result->OpenId) { memcpy(&msgInfo->Response.OpenResult, result, sizeof(struct vmbus_channel_open_result)); osd_WaitEventSet(msgInfo->WaitEvent); break; } } } spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); } /* * VmbusChannelOnGpadlCreated - 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(struct vmbus_channel_message_header *hdr) { struct vmbus_channel_gpadl_created *gpadlCreated; struct list_head *curr; struct vmbus_channel_msginfo *msgInfo; struct vmbus_channel_message_header *requestHeader; struct vmbus_channel_gpadl_header *gpadlHeader; unsigned long flags; gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr; DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", gpadlCreated->CreationStatus); /* * Find the establish msg, copy the result and signal/unblock the wait * event */ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); list_for_each(curr, &gVmbusConnection.ChannelMsgList) { /* FIXME: this should probably use list_entry() instead */ msgInfo = (struct vmbus_channel_msginfo *)curr; requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; if (requestHeader->MessageType == ChannelMessageGpadlHeader) { gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader; if ((gpadlCreated->ChildRelId == gpadlHeader->ChildRelId) && (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) { memcpy(&msgInfo->Response.GpadlCreated, gpadlCreated, sizeof(struct vmbus_channel_gpadl_created)); osd_WaitEventSet(msgInfo->WaitEvent); break; } } } spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); } /* * VmbusChannelOnGpadlTorndown - 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( struct vmbus_channel_message_header *hdr) { struct vmbus_channel_gpadl_torndown *gpadlTorndown; struct list_head *curr; struct vmbus_channel_msginfo *msgInfo; struct vmbus_channel_message_header *requestHeader; struct vmbus_channel_gpadl_teardown *gpadlTeardown; unsigned long flags; gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr; /* * Find the open msg, copy the result and signal/unblock the wait event */ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); list_for_each(curr, &gVmbusConnection.ChannelMsgList) { /* FIXME: this should probably use list_entry() instead */ msgInfo = (struct vmbus_channel_msginfo *)curr; requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; if (requestHeader->MessageType == ChannelMessageGpadlTeardown) { gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader; if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) { memcpy(&msgInfo->Response.GpadlTorndown, gpadlTorndown, sizeof(struct vmbus_channel_gpadl_torndown)); osd_WaitEventSet(msgInfo->WaitEvent); break; } } } spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); } /* * VmbusChannelOnVersionResponse - 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( struct vmbus_channel_message_header *hdr) { struct list_head *curr; struct vmbus_channel_msginfo *msgInfo; struct vmbus_channel_message_header *requestHeader; struct vmbus_channel_initiate_contact *initiate; struct vmbus_channel_version_response *versionResponse; unsigned long flags; versionResponse = (struct vmbus_channel_version_response *)hdr; spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); list_for_each(curr, &gVmbusConnection.ChannelMsgList) { /* FIXME: this should probably use list_entry() instead */ msgInfo = (struct vmbus_channel_msginfo *)curr; requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; if (requestHeader->MessageType == ChannelMessageInitiateContact) { initiate = (struct vmbus_channel_initiate_contact *)requestHeader; memcpy(&msgInfo->Response.VersionResponse, versionResponse, sizeof(struct vmbus_channel_version_response)); osd_WaitEventSet(msgInfo->WaitEvent); } } spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); } /* Channel message dispatch table */ static struct 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}, }; /* * VmbusOnChannelMessage - Handler for channel protocol messages. * * This is invoked in the vmbus worker thread context. */ void VmbusOnChannelMessage(void *Context) { struct hv_message *msg = Context; struct vmbus_channel_message_header *hdr; int size; hdr = (struct 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); print_hex_dump_bytes("", DUMP_PREFIX_NONE, (unsigned char *)msg->u.Payload, size); kfree(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() */ kfree(msg); } /* * VmbusChannelRequestOffers - Send a request to get all our pending offers. */ int VmbusChannelRequestOffers(void) { struct vmbus_channel_message_header *msg; struct vmbus_channel_msginfo *msgInfo; int ret; msgInfo = kmalloc(sizeof(*msgInfo) + sizeof(struct vmbus_channel_message_header), GFP_KERNEL); if (!msgInfo) return -ENOMEM; msgInfo->WaitEvent = osd_WaitEventCreate(); if (!msgInfo->WaitEvent) { kfree(msgInfo); return -ENOMEM; } msg = (struct 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(struct 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; } /* osd_WaitEventWait(msgInfo->waitEvent); */ /*SpinlockAcquire(gVmbusConnection.channelMsgLock); REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); SpinlockRelease(gVmbusConnection.channelMsgLock);*/ Cleanup: if (msgInfo) { kfree(msgInfo->WaitEvent); kfree(msgInfo); } return ret; } /* * VmbusChannelReleaseUnattachedChannels - Release channels that are * unattached/unconnected ie (no drivers associated) */ void VmbusChannelReleaseUnattachedChannels(void) { struct vmbus_channel *channel, *pos; struct vmbus_channel *start = NULL; unsigned long flags; spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList, ListEntry) { if (channel == start) break; if (!channel->DeviceObject->Driver) { list_del(&channel->ListEntry); DPRINT_INFO(VMBUS, "Releasing unattached device object %p", channel->DeviceObject); VmbusChildDeviceRemove(channel->DeviceObject); FreeVmbusChannel(channel); } else { if (!start) start = channel; } } spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); } /* eof */