int
HgfsBackdoorSendRequest(HgfsReq *req) // IN/OUT: Request to be sent
{
char const *replyPacket;
size_t packetSize;
ASSERT(req->state == HGFS_REQ_SUBMITTED);
ASSERT(req->packetSize <= HGFS_PACKET_MAX);
bcopy(req->packet, packetBuffer, req->packetSize);
packetSize = req->packetSize;
DEBUG(VM_DEBUG_COMM,
"HgfsBackdoorSendRequest: Sending packet over backdoor\n");
/*
* We should attempt to reopen the backdoor channel with every request,
* because the HGFS server in the host can be enabled or disabled at any
* time.
*/
if (!HgfsBd_OpenBackdoor(&hgfsRpcOut)) {
DEBUG(VM_DEBUG_COMM,
"HgfsBackdoorSendRequest: HGFS is disabled in the host\n");
req->state = HGFS_REQ_ERROR;
return ENOSYS;
} else if (HgfsBd_Dispatch(hgfsRpcOut, packetBuffer,
&packetSize, &replyPacket) == 0) {
DEBUG(VM_DEBUG_COMM,
"HgfsBackdoorSendRequest: backdoor reply received\n");
/* Request was sent successfully. Copy the reply and return to the client. */
ASSERT(packetSize <= HGFS_PACKET_MAX);
bcopy(replyPacket, req->packet, packetSize);
req->packetSize = packetSize;
req->state = HGFS_REQ_COMPLETED;
} else {
DEBUG(VM_DEBUG_COMM,
"HgfsBackdoorSendRequest: backdoor error\n");
/* Pass the error into the request. */
req->state = HGFS_REQ_ERROR;
/*
* If the channel was previously open, make sure it's dead and gone
* now. We do this because subsequent requests deserve a chance to
* reopen it.
*/
HgfsBd_CloseBackdoor(&hgfsRpcOut);
}
return 0;
}
void
HgfsBackdoorCleanup(void)
{
DEBUG(VM_DEBUG_COMM, "HgfsBackdoorCleanup: Closing backdoor\n");
HgfsBd_CloseBackdoor(&hgfsRpcOut);
HgfsBd_PutBuf(packetBuffer);
}
static void
HgfsBdChannelClose(HgfsTransportChannel *channel) // IN: Channel
{
ASSERT(channel->priv != NULL);
HgfsBd_CloseBackdoor((RpcOut **)&channel->priv);
ASSERT(channel->priv == NULL);
LOG(8, ("VMware hgfs: %s: backdoor closed.\n", __func__));
}
static void
HgfsBdChannelCloseInt(HgfsTransportChannel *channel) // IN: Channel
{
if (channel->status == HGFS_CHANNEL_CONNECTED) {
ASSERT(channel->priv != NULL);
HgfsBd_CloseBackdoor((RpcOut **)&channel->priv);
ASSERT(channel->priv == NULL);
channel->status = HGFS_CHANNEL_NOTCONNECTED;
}
LOG(8, ("Backdoor closed.\n"));
}
