* OVS_USE_NL_INTERFACE = 0 => legacy inteface to use with dpif-windows.c
* OVS_USE_NL_INTERFACE = 1 => netlink inteface to use with ported dpif-linux.c
*/
-#if defined OVS_USE_NL_INTERFACE && OVS_USE_NL_INTERFACE == 1
#include "precomp.h"
+#include "Switch.h"
+#include "User.h"
#include "Datapath.h"
#include "Jhash.h"
-#include "Switch.h"
#include "Vport.h"
#include "Event.h"
#include "User.h"
#include "NetProto.h"
#include "Flow.h"
#include "User.h"
+#include "Vxlan.h"
#ifdef OVS_DBG_MOD
#undef OVS_DBG_MOD
* Handler for a given netlink command. Not all the parameters are used by all
* the handlers.
*/
-typedef NTSTATUS (*NetlinkCmdHandler)(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
- UINT32 *replyLen);
+typedef NTSTATUS(NetlinkCmdHandler)(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen);
typedef struct _NETLINK_CMD {
UINT16 cmd;
- NetlinkCmdHandler handler;
+ NetlinkCmdHandler *handler;
UINT32 supportedDevOp; /* Supported device operations. */
BOOLEAN validateDpIndex; /* Does command require a valid DP argument. */
} NETLINK_CMD, *PNETLINK_CMD;
/* A netlink family is a group of commands. */
typedef struct _NETLINK_FAMILY {
CHAR *name;
- UINT32 id;
+ UINT16 id;
UINT8 version;
- UINT8 pad;
+ UINT8 pad1;
UINT16 maxAttr;
+ UINT16 pad2;
NETLINK_CMD *cmds; /* Array of netlink commands and handlers. */
UINT16 opsCount;
} NETLINK_FAMILY, *PNETLINK_FAMILY;
-/*
- * Device operations to tag netlink commands with. This is a bitmask since it is
- * possible that a particular command can be invoked via different device
- * operations.
- */
-#define OVS_READ_DEV_OP (1 << 0)
-#define OVS_WRITE_DEV_OP (1 << 1)
-#define OVS_TRANSACTION_DEV_OP (1 << 2)
-
/* Handlers for the various netlink commands. */
-static NTSTATUS OvsGetPidCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+static NetlinkCmdHandler OvsPendEventCmdHandler,
+ OvsPendPacketCmdHandler,
+ OvsSubscribeEventCmdHandler,
+ OvsSubscribePacketCmdHandler,
+ OvsReadEventCmdHandler,
+ OvsReadPacketCmdHandler,
+ OvsNewDpCmdHandler,
+ OvsGetDpCmdHandler,
+ OvsSetDpCmdHandler;
+
+NetlinkCmdHandler OvsGetNetdevCmdHandler,
+ OvsGetVportCmdHandler,
+ OvsSetVportCmdHandler,
+ OvsNewVportCmdHandler,
+ OvsDeleteVportCmdHandler;
+
+static NTSTATUS HandleGetDpTransaction(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen);
+static NTSTATUS HandleGetDpDump(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen);
+static NTSTATUS HandleDpTransactionCommon(
+ POVS_USER_PARAMS_CONTEXT usrParamsCtx, UINT32 *replyLen);
+static NTSTATUS OvsGetPidHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
UINT32 *replyLen);
-static NTSTATUS OvsGetDpCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
- UINT32 *replyLen);
-
/*
* The various netlink families, along with the supported commands. Most of
* these families and commands are part of the openvswitch specification for a
/* Netlink control family: this is a Windows specific family. */
NETLINK_CMD nlControlFamilyCmdOps[] = {
- { .cmd = OVS_CTRL_CMD_WIN_GET_PID,
- .handler = OvsGetPidCmdHandler,
- .supportedDevOp = OVS_TRANSACTION_DEV_OP,
- .validateDpIndex = FALSE
+ { .cmd = OVS_CTRL_CMD_WIN_PEND_REQ,
+ .handler = OvsPendEventCmdHandler,
+ .supportedDevOp = OVS_WRITE_DEV_OP,
+ .validateDpIndex = TRUE,
+ },
+ { .cmd = OVS_CTRL_CMD_WIN_PEND_PACKET_REQ,
+ .handler = OvsPendPacketCmdHandler,
+ .supportedDevOp = OVS_WRITE_DEV_OP,
+ .validateDpIndex = TRUE,
+ },
+ { .cmd = OVS_CTRL_CMD_MC_SUBSCRIBE_REQ,
+ .handler = OvsSubscribeEventCmdHandler,
+ .supportedDevOp = OVS_WRITE_DEV_OP,
+ .validateDpIndex = TRUE,
+ },
+ { .cmd = OVS_CTRL_CMD_PACKET_SUBSCRIBE_REQ,
+ .handler = OvsSubscribePacketCmdHandler,
+ .supportedDevOp = OVS_WRITE_DEV_OP,
+ .validateDpIndex = TRUE,
+ },
+ { .cmd = OVS_CTRL_CMD_EVENT_NOTIFY,
+ .handler = OvsReadEventCmdHandler,
+ .supportedDevOp = OVS_READ_DEV_OP,
+ .validateDpIndex = FALSE,
+ },
+ { .cmd = OVS_CTRL_CMD_READ_NOTIFY,
+ .handler = OvsReadPacketCmdHandler,
+ .supportedDevOp = OVS_READ_DEV_OP,
+ .validateDpIndex = FALSE,
}
};
/* Netlink datapath family. */
NETLINK_CMD nlDatapathFamilyCmdOps[] = {
+ { .cmd = OVS_DP_CMD_NEW,
+ .handler = OvsNewDpCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = FALSE
+ },
{ .cmd = OVS_DP_CMD_GET,
.handler = OvsGetDpCmdHandler,
- .supportedDevOp = OVS_WRITE_DEV_OP | OVS_READ_DEV_OP,
+ .supportedDevOp = OVS_WRITE_DEV_OP | OVS_READ_DEV_OP |
+ OVS_TRANSACTION_DEV_OP,
.validateDpIndex = FALSE
+ },
+ { .cmd = OVS_DP_CMD_SET,
+ .handler = OvsSetDpCmdHandler,
+ .supportedDevOp = OVS_WRITE_DEV_OP | OVS_READ_DEV_OP |
+ OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
}
};
};
/* Netlink packet family. */
-/* XXX: Add commands here. */
+
+NETLINK_CMD nlPacketFamilyCmdOps[] = {
+ { .cmd = OVS_PACKET_CMD_EXECUTE,
+ .handler = OvsNlExecuteCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ }
+};
+
NETLINK_FAMILY nlPacketFamilyOps = {
.name = OVS_PACKET_FAMILY,
.id = OVS_WIN_NL_PACKET_FAMILY_ID,
.version = OVS_PACKET_VERSION,
.maxAttr = OVS_PACKET_ATTR_MAX,
- .cmds = NULL, /* XXX: placeholder. */
- .opsCount = 0
+ .cmds = nlPacketFamilyCmdOps,
+ .opsCount = ARRAY_SIZE(nlPacketFamilyCmdOps)
};
/* Netlink vport family. */
-/* XXX: Add commands here. */
+NETLINK_CMD nlVportFamilyCmdOps[] = {
+ { .cmd = OVS_VPORT_CMD_GET,
+ .handler = OvsGetVportCmdHandler,
+ .supportedDevOp = OVS_WRITE_DEV_OP | OVS_READ_DEV_OP |
+ OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+ { .cmd = OVS_VPORT_CMD_NEW,
+ .handler = OvsNewVportCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+ { .cmd = OVS_VPORT_CMD_SET,
+ .handler = OvsSetVportCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+ { .cmd = OVS_VPORT_CMD_DEL,
+ .handler = OvsDeleteVportCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+};
+
NETLINK_FAMILY nlVportFamilyOps = {
.name = OVS_VPORT_FAMILY,
.id = OVS_WIN_NL_VPORT_FAMILY_ID,
.version = OVS_VPORT_VERSION,
.maxAttr = OVS_VPORT_ATTR_MAX,
- .cmds = NULL, /* XXX: placeholder. */
- .opsCount = 0
+ .cmds = nlVportFamilyCmdOps,
+ .opsCount = ARRAY_SIZE(nlVportFamilyCmdOps)
};
/* Netlink flow family. */
-/* XXX: Add commands here. */
+
+NETLINK_CMD nlFlowFamilyCmdOps[] = {
+ { .cmd = OVS_FLOW_CMD_NEW,
+ .handler = OvsFlowNlCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+ { .cmd = OVS_FLOW_CMD_SET,
+ .handler = OvsFlowNlCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+ { .cmd = OVS_FLOW_CMD_DEL,
+ .handler = OvsFlowNlCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+ { .cmd = OVS_FLOW_CMD_GET,
+ .handler = OvsFlowNlGetCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP |
+ OVS_WRITE_DEV_OP | OVS_READ_DEV_OP,
+ .validateDpIndex = TRUE
+ },
+};
+
NETLINK_FAMILY nlFLowFamilyOps = {
.name = OVS_FLOW_FAMILY,
.id = OVS_WIN_NL_FLOW_FAMILY_ID,
.version = OVS_FLOW_VERSION,
.maxAttr = OVS_FLOW_ATTR_MAX,
- .cmds = NULL, /* XXX: placeholder. */
- .opsCount = 0
+ .cmds = nlFlowFamilyCmdOps,
+ .opsCount = ARRAY_SIZE(nlFlowFamilyCmdOps)
+};
+
+/* Netlink netdev family. */
+NETLINK_CMD nlNetdevFamilyCmdOps[] = {
+ { .cmd = OVS_WIN_NETDEV_CMD_GET,
+ .handler = OvsGetNetdevCmdHandler,
+ .supportedDevOp = OVS_TRANSACTION_DEV_OP,
+ .validateDpIndex = FALSE
+ },
+};
+
+NETLINK_FAMILY nlNetdevFamilyOps = {
+ .name = OVS_WIN_NETDEV_FAMILY,
+ .id = OVS_WIN_NL_NETDEV_FAMILY_ID,
+ .version = OVS_WIN_NETDEV_VERSION,
+ .maxAttr = OVS_WIN_NETDEV_ATTR_MAX,
+ .cmds = nlNetdevFamilyCmdOps,
+ .opsCount = ARRAY_SIZE(nlNetdevFamilyCmdOps)
};
static NTSTATUS MapIrpOutputBuffer(PIRP irp,
static NTSTATUS InvokeNetlinkCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
NETLINK_FAMILY *nlFamilyOps,
UINT32 *replyLen);
-static NTSTATUS OvsSetupDumpStart(POVS_USER_PARAMS_CONTEXT usrParamsCtx);
-
/* Handles to the device object for communication with userspace. */
NDIS_HANDLE gOvsDeviceHandle;
NDIS_SPIN_LOCK ovsCtrlLockObj;
PNDIS_SPIN_LOCK gOvsCtrlLock;
+NTSTATUS
+InitUserDumpState(POVS_OPEN_INSTANCE instance,
+ POVS_MESSAGE ovsMsg)
+{
+ /* Clear the dumpState from a previous dump sequence. */
+ ASSERT(instance->dumpState.ovsMsg == NULL);
+ ASSERT(ovsMsg);
+
+ instance->dumpState.ovsMsg =
+ (POVS_MESSAGE)OvsAllocateMemoryWithTag(sizeof(OVS_MESSAGE),
+ OVS_DATAPATH_POOL_TAG);
+ if (instance->dumpState.ovsMsg == NULL) {
+ return STATUS_NO_MEMORY;
+ }
+ RtlCopyMemory(instance->dumpState.ovsMsg, ovsMsg,
+ sizeof *instance->dumpState.ovsMsg);
+ RtlZeroMemory(instance->dumpState.index,
+ sizeof instance->dumpState.index);
+
+ return STATUS_SUCCESS;
+}
+
+VOID
+FreeUserDumpState(POVS_OPEN_INSTANCE instance)
+{
+ if (instance->dumpState.ovsMsg != NULL) {
+ OvsFreeMemoryWithTag(instance->dumpState.ovsMsg,
+ OVS_DATAPATH_POOL_TAG);
+ RtlZeroMemory(&instance->dumpState, sizeof instance->dumpState);
+ }
+}
VOID
OvsInit()
gOvsCtrlLock = &ovsCtrlLockObj;
NdisAllocateSpinLock(gOvsCtrlLock);
OvsInitEventQueue();
- OvsUserInit();
}
VOID
NdisFreeSpinLock(gOvsCtrlLock);
gOvsCtrlLock = NULL;
}
- OvsUserCleanup();
}
VOID
ovsExt->numberOpenInstance = 0;
}
} else {
- /* Initialize the associated data structures. */
- OvsInit();
+ OvsRegisterSystemProvider((PVOID)gOvsDeviceObject);
}
+
OVS_LOG_TRACE("DeviceObject: %p", gOvsDeviceObject);
return status;
}
NdisDeregisterDeviceEx(gOvsDeviceHandle);
gOvsDeviceHandle = NULL;
gOvsDeviceObject = NULL;
+
+ OvsUnregisterSystemProvider();
}
- OvsCleanup();
}
POVS_OPEN_INSTANCE
POVS_OPEN_INSTANCE instance = (POVS_OPEN_INSTANCE)fileObject->FsContext;
ASSERT(instance);
ASSERT(instance->fileObject == fileObject);
- if (gOvsSwitchContext == NULL ||
- gOvsSwitchContext->dpNo != dpNo) {
+ if (gOvsSwitchContext->dpNo != dpNo) {
return NULL;
}
return instance;
PFILE_OBJECT fileObject)
{
POVS_OPEN_INSTANCE instance =
- (POVS_OPEN_INSTANCE) OvsAllocateMemory(sizeof (OVS_OPEN_INSTANCE));
+ (POVS_OPEN_INSTANCE)OvsAllocateMemoryWithTag(sizeof(OVS_OPEN_INSTANCE),
+ OVS_DATAPATH_POOL_TAG);
UINT32 i;
if (instance == NULL) {
if (ovsNumberOfOpenInstances >= OVS_MAX_OPEN_INSTANCES) {
OvsReleaseCtrlLock();
- OvsFreeMemory(instance);
+ OvsFreeMemoryWithTag(instance, OVS_DATAPATH_POOL_TAG);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory(instance, sizeof (OVS_OPEN_INSTANCE));
for (i = 0; i < OVS_MAX_OPEN_INSTANCES; i++) {
if (ovsOpenInstanceArray[i] == NULL) {
ovsOpenInstanceArray[i] = instance;
+ ovsNumberOfOpenInstances++;
instance->cookie = i;
break;
}
fileObject->FsContext = NULL;
ASSERT(ovsOpenInstanceArray[instance->cookie] == instance);
ovsOpenInstanceArray[instance->cookie] = NULL;
+ ovsNumberOfOpenInstances--;
OvsReleaseCtrlLock();
ASSERT(instance->eventQueue == NULL);
ASSERT (instance->packetQueue == NULL);
- OvsFreeMemory(instance);
+ FreeUserDumpState(instance);
+ OvsFreeMemoryWithTag(instance, OVS_DATAPATH_POOL_TAG);
}
NTSTATUS
return OvsCompleteIrpRequest(irp, (ULONG_PTR)0, status);
}
-
/*
* --------------------------------------------------------------------------
* IOCTL function handler for the device.
OvsDeviceControl(PDEVICE_OBJECT deviceObject,
PIRP irp)
{
-
PIO_STACK_LOCATION irpSp;
NTSTATUS status = STATUS_SUCCESS;
PFILE_OBJECT fileObject;
outputBufferLen = irpSp->Parameters.DeviceIoControl.OutputBufferLength;
inputBuffer = irp->AssociatedIrp.SystemBuffer;
- /* Concurrent netlink operations are not supported. */
- if (InterlockedCompareExchange((LONG volatile *)&instance->inUse, 1, 0)) {
- status = STATUS_RESOURCE_IN_USE;
- goto done;
+ /* Check if the extension is enabled. */
+ if (NULL == gOvsSwitchContext) {
+ status = STATUS_NOT_FOUND;
+ goto exit;
+ }
+
+ if (!OvsAcquireSwitchContext()) {
+ status = STATUS_NOT_FOUND;
+ goto exit;
}
/*
* operation.
*/
switch (code) {
+ case OVS_IOCTL_GET_PID:
+ /* Both input buffer and output buffer use the same location. */
+ outputBuffer = irp->AssociatedIrp.SystemBuffer;
+ if (outputBufferLen != 0) {
+ InitUserParamsCtx(irp, instance, 0, NULL,
+ inputBuffer, inputBufferLen,
+ outputBuffer, outputBufferLen,
+ &usrParamsCtx);
+
+ ASSERT(outputBuffer);
+ } else {
+ status = STATUS_NDIS_INVALID_LENGTH;
+ goto done;
+ }
+
+ status = OvsGetPidHandler(&usrParamsCtx, &replyLen);
+ goto done;
+
case OVS_IOCTL_TRANSACT:
- /* Input buffer is mandatory, output buffer is optional. */
+ /* Both input buffer and output buffer are mandatory. */
if (outputBufferLen != 0) {
status = MapIrpOutputBuffer(irp, outputBufferLen,
sizeof *ovsMsg, &outputBuffer);
goto done;
}
ASSERT(outputBuffer);
+ } else {
+ status = STATUS_NDIS_INVALID_LENGTH;
+ goto done;
}
if (inputBufferLen < sizeof (*ovsMsg)) {
devOp = OVS_TRANSACTION_DEV_OP;
break;
+ case OVS_IOCTL_READ_EVENT:
+ case OVS_IOCTL_READ_PACKET:
+ /*
+ * Output buffer is mandatory. These IOCTLs are used to read events and
+ * packets respectively. It is convenient to have separate ioctls.
+ */
+ if (outputBufferLen != 0) {
+ status = MapIrpOutputBuffer(irp, outputBufferLen,
+ sizeof *ovsMsg, &outputBuffer);
+ if (status != STATUS_SUCCESS) {
+ goto done;
+ }
+ ASSERT(outputBuffer);
+ } else {
+ status = STATUS_NDIS_INVALID_LENGTH;
+ goto done;
+ }
+ inputBuffer = NULL;
+ inputBufferLen = 0;
+
+ ovsMsg = &ovsMsgReadOp;
+ RtlZeroMemory(ovsMsg, sizeof *ovsMsg);
+ ovsMsg->nlMsg.nlmsgLen = sizeof *ovsMsg;
+ ovsMsg->nlMsg.nlmsgType = nlControlFamilyOps.id;
+ ovsMsg->nlMsg.nlmsgPid = instance->pid;
+
+ /* An "artificial" command so we can use NL family function table*/
+ ovsMsg->genlMsg.cmd = (code == OVS_IOCTL_READ_EVENT) ?
+ OVS_CTRL_CMD_EVENT_NOTIFY :
+ OVS_CTRL_CMD_READ_NOTIFY;
+ ovsMsg->genlMsg.version = nlControlFamilyOps.version;
+
+ devOp = OVS_READ_DEV_OP;
+ break;
+
case OVS_IOCTL_READ:
/* Output buffer is mandatory. */
if (outputBufferLen != 0) {
* state in the instance to indicate the command that started the dump
* operation. The state can setup 'ovsMsgReadOp' appropriately. Note
* that 'ovsMsgReadOp' is needed only in this function to call into the
- * appropraite handler. The handler itself can access the state in the
+ * appropriate handler. The handler itself can access the state in the
* instance.
*
* In the absence of a dump start, return 0 bytes.
case OVS_WIN_NL_DATAPATH_FAMILY_ID:
nlFamilyOps = &nlDatapathFamilyOps;
break;
- case OVS_WIN_NL_PACKET_FAMILY_ID:
case OVS_WIN_NL_FLOW_FAMILY_ID:
+ nlFamilyOps = &nlFLowFamilyOps;
+ break;
+ case OVS_WIN_NL_PACKET_FAMILY_ID:
+ nlFamilyOps = &nlPacketFamilyOps;
+ break;
case OVS_WIN_NL_VPORT_FAMILY_ID:
- status = STATUS_NOT_IMPLEMENTED;
- goto done;
-
+ nlFamilyOps = &nlVportFamilyOps;
+ break;
+ case OVS_WIN_NL_NETDEV_FAMILY_ID:
+ nlFamilyOps = &nlNetdevFamilyOps;
+ break;
default:
status = STATUS_INVALID_PARAMETER;
goto done;
}
/*
- * For read operation, the netlink command has already been validated
- * previously.
+ * For read operation, avoid duplicate validation since 'ovsMsg' is either
+ * "artificial" or was copied from a previously validated 'ovsMsg'.
*/
if (devOp != OVS_READ_DEV_OP) {
status = ValidateNetlinkCmd(devOp, instance, ovsMsg, nlFamilyOps);
status = InvokeNetlinkCmdHandler(&usrParamsCtx, nlFamilyOps, &replyLen);
done:
- KeMemoryBarrier();
- instance->inUse = 0;
+ OvsReleaseSwitchContext(gOvsSwitchContext);
+
+exit:
+ /* Should not complete a pending IRP unless proceesing is completed. */
+ if (status == STATUS_PENDING) {
+ /* STATUS_PENDING is returned by the NL handler when the request is
+ * to be processed later, so we mark the IRP as pending and complete
+ * it in another thread when the request is processed. */
+ IoMarkIrpPending(irp);
+ return status;
+ }
return OvsCompleteIrpRequest(irp, (ULONG_PTR)replyLen, status);
}
* --------------------------------------------------------------------------
* Function to validate a netlink command. Only certain combinations of
* (device operation, netlink family, command) are valid.
- *
- * XXX: Take policy into consideration.
* --------------------------------------------------------------------------
*/
static NTSTATUS
/* Validate the DP for commands that require a DP. */
if (nlFamilyOps->cmds[i].validateDpIndex == TRUE) {
- OvsAcquireCtrlLock();
if (ovsMsg->ovsHdr.dp_ifindex !=
- (INT)gOvsSwitchContext->dpNo) {
+ (INT)gOvsSwitchContext->dpNo) {
status = STATUS_INVALID_PARAMETER;
- OvsReleaseCtrlLock();
goto done;
}
- OvsReleaseCtrlLock();
}
/* Validate the PID. */
- if (ovsMsg->genlMsg.cmd != OVS_CTRL_CMD_WIN_GET_PID) {
- if (ovsMsg->nlMsg.nlmsgPid != instance->pid) {
- status = STATUS_INVALID_PARAMETER;
- goto done;
- }
+ if (ovsMsg->nlMsg.nlmsgPid != instance->pid) {
+ status = STATUS_INVALID_PARAMETER;
+ goto done;
}
status = STATUS_SUCCESS;
/*
* --------------------------------------------------------------------------
- * Function to invoke the netlink command handler.
+ * Function to invoke the netlink command handler. The function also stores
+ * the return value of the handler function to construct a 'NL_ERROR' message,
+ * and in turn returns success to the caller.
* --------------------------------------------------------------------------
*/
static NTSTATUS
for (i = 0; i < nlFamilyOps->opsCount; i++) {
if (nlFamilyOps->cmds[i].cmd == usrParamsCtx->ovsMsg->genlMsg.cmd) {
- status = nlFamilyOps->cmds[i].handler(usrParamsCtx, replyLen);
+ NetlinkCmdHandler *handler = nlFamilyOps->cmds[i].handler;
+ ASSERT(handler);
+ if (handler) {
+ status = handler(usrParamsCtx, replyLen);
+ }
break;
}
}
+ /*
+ * Netlink socket semantics dictate that the return value of the netlink
+ * function should be an error ONLY under fatal conditions. If the message
+ * made it all the way to the handler function, it is not a fatal condition.
+ * Absorb the error returned by the handler function into a 'struct
+ * NL_ERROR' and populate the 'output buffer' to return to userspace.
+ *
+ * This behavior is obviously applicable only to netlink commands that
+ * specify an 'output buffer'. For other commands, we return the error as
+ * is.
+ *
+ * 'STATUS_PENDING' is a special return value and userspace is equipped to
+ * handle it.
+ */
+ if (status != STATUS_SUCCESS && status != STATUS_PENDING) {
+ if (usrParamsCtx->devOp != OVS_WRITE_DEV_OP && *replyLen == 0) {
+ NL_ERROR nlError = NlMapStatusToNlErr(status);
+ POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
+ POVS_MESSAGE_ERROR msgError = (POVS_MESSAGE_ERROR)
+ usrParamsCtx->outputBuffer;
+
+ ASSERT(msgError);
+ NlBuildErrorMsg(msgIn, msgError, nlError);
+ *replyLen = msgError->nlMsg.nlmsgLen;
+ }
+
+ if (*replyLen != 0) {
+ status = STATUS_SUCCESS;
+ }
+ }
+
+#ifdef DBG
+ if (usrParamsCtx->devOp != OVS_WRITE_DEV_OP) {
+ ASSERT(status == STATUS_PENDING || *replyLen != 0 || status == STATUS_SUCCESS);
+ }
+#endif
+
return status;
}
-
/*
* --------------------------------------------------------------------------
- * Each handle on the device is assigned a unique PID when the handle is
- * created. On platforms that support netlink natively, the PID is available
- * to userspace when the netlink socket is created. However, without native
- * netlink support on Windows, OVS datapath generates the PID and lets the
- * userspace query it.
+ * Handler for 'OVS_IOCTL_GET_PID'.
*
- * This function implements the query.
+ * Each handle on the device is assigned a unique PID when the handle is
+ * created. This function passes the PID to userspace using METHOD_BUFFERED
+ * method.
* --------------------------------------------------------------------------
*/
static NTSTATUS
-OvsGetPidCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
- UINT32 *replyLen)
+OvsGetPidHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
{
- POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
- POVS_MESSAGE msgOut = (POVS_MESSAGE)usrParamsCtx->outputBuffer;
+ NTSTATUS status = STATUS_SUCCESS;
+ PUINT32 msgOut = (PUINT32)usrParamsCtx->outputBuffer;
if (usrParamsCtx->outputLength >= sizeof *msgOut) {
POVS_OPEN_INSTANCE instance =
(POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
RtlZeroMemory(msgOut, sizeof *msgOut);
- msgOut->nlMsg.nlmsgSeq = msgIn->nlMsg.nlmsgSeq;
- msgOut->nlMsg.nlmsgPid = instance->pid;
+ RtlCopyMemory(msgOut, &instance->pid, sizeof(*msgOut));
*replyLen = sizeof *msgOut;
- /* XXX: We might need to return the DP index as well. */
} else {
- return STATUS_NDIS_INVALID_LENGTH;
+ *replyLen = sizeof *msgOut;
+ status = STATUS_NDIS_INVALID_LENGTH;
}
- return STATUS_SUCCESS;
+ return status;
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Utility function to fill up information about the datapath in a reply to
+ * userspace.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsDpFillInfo(POVS_SWITCH_CONTEXT ovsSwitchContext,
+ POVS_MESSAGE msgIn,
+ PNL_BUFFER nlBuf)
+{
+ BOOLEAN writeOk;
+ OVS_MESSAGE msgOutTmp;
+ OVS_DATAPATH *datapath = &ovsSwitchContext->datapath;
+ PNL_MSG_HDR nlMsg;
+
+ ASSERT(NlBufAt(nlBuf, 0, 0) != 0 && NlBufRemLen(nlBuf) >= sizeof *msgIn);
+
+ msgOutTmp.nlMsg.nlmsgType = OVS_WIN_NL_DATAPATH_FAMILY_ID;
+ msgOutTmp.nlMsg.nlmsgFlags = 0; /* XXX: ? */
+ msgOutTmp.nlMsg.nlmsgSeq = msgIn->nlMsg.nlmsgSeq;
+ msgOutTmp.nlMsg.nlmsgPid = msgIn->nlMsg.nlmsgPid;
+
+ msgOutTmp.genlMsg.cmd = OVS_DP_CMD_GET;
+ msgOutTmp.genlMsg.version = nlDatapathFamilyOps.version;
+ msgOutTmp.genlMsg.reserved = 0;
+
+ msgOutTmp.ovsHdr.dp_ifindex = ovsSwitchContext->dpNo;
+
+ writeOk = NlMsgPutHead(nlBuf, (PCHAR)&msgOutTmp, sizeof msgOutTmp);
+ if (writeOk) {
+ writeOk = NlMsgPutTailString(nlBuf, OVS_DP_ATTR_NAME,
+ OVS_SYSTEM_DP_NAME);
+ }
+ if (writeOk) {
+ OVS_DP_STATS dpStats;
+
+ dpStats.n_hit = datapath->hits;
+ dpStats.n_missed = datapath->misses;
+ dpStats.n_lost = datapath->lost;
+ dpStats.n_flows = datapath->nFlows;
+ writeOk = NlMsgPutTailUnspec(nlBuf, OVS_DP_ATTR_STATS,
+ (PCHAR)&dpStats, sizeof dpStats);
+ }
+ nlMsg = (PNL_MSG_HDR)NlBufAt(nlBuf, 0, 0);
+ nlMsg->nlmsgLen = NlBufSize(nlBuf);
+
+ return writeOk ? STATUS_SUCCESS : STATUS_INVALID_BUFFER_SIZE;
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Handler for queueing an IRP used for event notification. The IRP is
+ * completed when a port state changes. STATUS_PENDING is returned on
+ * success. User mode keep a pending IRP at all times.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsPendEventCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ NDIS_STATUS status;
+
+ UNREFERENCED_PARAMETER(replyLen);
+
+ POVS_OPEN_INSTANCE instance =
+ (POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
+ POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
+ OVS_EVENT_POLL poll;
+
+ poll.dpNo = msgIn->ovsHdr.dp_ifindex;
+ status = OvsWaitEventIoctl(usrParamsCtx->irp, instance->fileObject,
+ &poll, sizeof poll);
+ return status;
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Handler for the subscription for the event queue
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsSubscribeEventCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ NDIS_STATUS status;
+ OVS_EVENT_SUBSCRIBE request;
+ BOOLEAN rc;
+ UINT8 join;
+ PNL_ATTR attrs[2];
+ const NL_POLICY policy[] = {
+ [OVS_NL_ATTR_MCAST_GRP] = {.type = NL_A_U32 },
+ [OVS_NL_ATTR_MCAST_JOIN] = {.type = NL_A_U8 },
+ };
+
+ UNREFERENCED_PARAMETER(replyLen);
+
+ POVS_OPEN_INSTANCE instance =
+ (POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
+ POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
+
+ rc = NlAttrParse(&msgIn->nlMsg, sizeof (*msgIn),
+ NlMsgAttrsLen((PNL_MSG_HDR)msgIn), policy, attrs, ARRAY_SIZE(attrs));
+ if (!rc) {
+ status = STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+
+ /* XXX Ignore the MC group for now */
+ join = NlAttrGetU8(attrs[OVS_NL_ATTR_MCAST_JOIN]);
+ request.dpNo = msgIn->ovsHdr.dp_ifindex;
+ request.subscribe = join;
+ request.mask = OVS_EVENT_MASK_ALL;
+
+ status = OvsSubscribeEventIoctl(instance->fileObject, &request,
+ sizeof request);
+done:
+ return status;
}
/*
* --------------------------------------------------------------------------
- * Handler for the get dp command. The function handles the initial call to
- * setup the dump state, as well as subsequent calls to continue dumping data.
+ * Command Handler for 'OVS_DP_CMD_NEW'.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsNewDpCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ return HandleDpTransactionCommon(usrParamsCtx, replyLen);
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Command Handler for 'OVS_DP_CMD_GET'.
+ *
+ * The function handles both the dump based as well as the transaction based
+ * 'OVS_DP_CMD_GET' command. In the dump command, it handles the initial
+ * call to setup dump state, as well as subsequent calls to continue dumping
+ * data.
* --------------------------------------------------------------------------
*/
static NTSTATUS
OvsGetDpCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
UINT32 *replyLen)
{
- POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
+ if (usrParamsCtx->devOp == OVS_TRANSACTION_DEV_OP) {
+ return HandleDpTransactionCommon(usrParamsCtx, replyLen);
+ } else {
+ return HandleGetDpDump(usrParamsCtx, replyLen);
+ }
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Function for handling the transaction based 'OVS_DP_CMD_GET' command.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+HandleGetDpTransaction(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ return HandleDpTransactionCommon(usrParamsCtx, replyLen);
+}
+
+
+/*
+ * --------------------------------------------------------------------------
+ * Function for handling the dump-based 'OVS_DP_CMD_GET' command.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+HandleGetDpDump(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
POVS_MESSAGE msgOut = (POVS_MESSAGE)usrParamsCtx->outputBuffer;
POVS_OPEN_INSTANCE instance =
(POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
*replyLen = 0;
OvsSetupDumpStart(usrParamsCtx);
} else {
+ NL_BUFFER nlBuf;
+ NTSTATUS status;
+ POVS_MESSAGE msgIn = instance->dumpState.ovsMsg;
+
ASSERT(usrParamsCtx->devOp == OVS_READ_DEV_OP);
if (instance->dumpState.ovsMsg == NULL) {
/* Dump state must have been deleted after previous dump operation. */
ASSERT(instance->dumpState.index[0] == 0);
+
/* Output buffer has been validated while validating read dev op. */
ASSERT(msgOut != NULL && usrParamsCtx->outputLength >= sizeof *msgOut);
- /* XXX: Replace this with the netlink set API. */
- msgIn = instance->dumpState.ovsMsg;
- msgOut->nlMsg.nlmsgType = OVS_WIN_NL_DATAPATH_FAMILY_ID;
- msgOut->nlMsg.nlmsgFlags = 0; /* XXX: ? */
- msgOut->nlMsg.nlmsgSeq = msgIn->nlMsg.nlmsgSeq;
- msgOut->nlMsg.nlmsgPid = msgIn->nlMsg.nlmsgPid;
- msgOut->nlMsg.nlmsgLen = sizeof *msgOut;
-
- msgOut->genlMsg.cmd = OVS_DP_CMD_GET;
- msgOut->genlMsg.version = nlDatapathFamilyOps.version;
- msgOut->genlMsg.reserved = 0;
-
- OvsAcquireCtrlLock();
- if (gOvsSwitchContext) {
- msgOut->ovsHdr.dp_ifindex = gOvsSwitchContext->dpNo;
- } else {
- /* Treat this as a dump done. */
- OvsReleaseCtrlLock();
+ NlBufInit(&nlBuf, usrParamsCtx->outputBuffer,
+ usrParamsCtx->outputLength);
+
+ status = OvsDpFillInfo(gOvsSwitchContext, msgIn, &nlBuf);
+
+ if (status != STATUS_SUCCESS) {
*replyLen = 0;
FreeUserDumpState(instance);
- return STATUS_SUCCESS;
- }
-
- /* XXX: Replace this with the netlink set API. */
- {
- /*
- * Assume that the output buffer is at least 512 bytes. Once the
- * netlink set API is implemented, the netlink buffer manipulation
- * API should provide for checking the remaining number of bytes as
- * we write out the message.
- */
- if (usrParamsCtx->outputLength <= 512) {
- OvsReleaseCtrlLock();
- return STATUS_NDIS_INVALID_LENGTH;
- }
- UINT16 attrTotalSize = 0;
- UINT16 attrSize = 0;
- PNL_ATTR nlAttr = (PNL_ATTR) ((PCHAR)msgOut + sizeof (*msgOut));
- struct ovs_dp_stats *dpStats;
- OVS_DATAPATH *datapath = &gOvsSwitchContext->datapath;
-
- nlAttr->nlaType = OVS_DP_ATTR_NAME;
- /* 'nlaLen' must not include the pad. */
- nlAttr->nlaLen = sizeof (*nlAttr) + sizeof (OVS_SYSTEM_DP_NAME);
- attrSize = sizeof (*nlAttr) +
- NLA_ALIGN(sizeof (OVS_SYSTEM_DP_NAME));
- attrTotalSize += attrSize;
-
- PNL_ATTR nlAttrNext = NlAttrGet(nlAttr);
- RtlCopyMemory((PCHAR)nlAttrNext, OVS_SYSTEM_DP_NAME,
- sizeof (OVS_SYSTEM_DP_NAME));
-
- nlAttr = (PNL_ATTR)((PCHAR)nlAttr + attrSize);
- nlAttr->nlaType = OVS_DP_ATTR_STATS;
- nlAttr->nlaLen = sizeof (*nlAttr) + sizeof (*dpStats);
- attrSize = sizeof (*nlAttr) + NLA_ALIGN(sizeof (*dpStats));
- attrTotalSize += attrSize;
-
- dpStats = NlAttrGet(nlAttr);
- dpStats->n_hit = datapath->hits;
- dpStats->n_missed = datapath->misses;
- dpStats->n_lost = datapath->lost;
- dpStats->n_flows = datapath->nFlows;
-
- msgOut->nlMsg.nlmsgLen += attrTotalSize;
+ return status;
}
- OvsReleaseCtrlLock();
/* Increment the dump index. */
instance->dumpState.index[0] = 1;
*replyLen = msgOut->nlMsg.nlmsgLen;
- ASSERT(*replyLen <= 512);
/* Free up the dump state, since there's no more data to continue. */
FreeUserDumpState(instance);
return STATUS_SUCCESS;
}
+
+/*
+ * --------------------------------------------------------------------------
+ * Command Handler for 'OVS_DP_CMD_SET'.
+ * --------------------------------------------------------------------------
+ */
static NTSTATUS
+OvsSetDpCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ return HandleDpTransactionCommon(usrParamsCtx, replyLen);
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Function for handling transaction based 'OVS_DP_CMD_NEW', 'OVS_DP_CMD_GET'
+ * and 'OVS_DP_CMD_SET' commands.
+ *
+ * 'OVS_DP_CMD_NEW' is implemented to keep userspace code happy. Creation of a
+ * new datapath is not supported currently.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+HandleDpTransactionCommon(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
+ POVS_MESSAGE msgOut = (POVS_MESSAGE)usrParamsCtx->outputBuffer;
+ NTSTATUS status = STATUS_SUCCESS;
+ NL_BUFFER nlBuf;
+ NL_ERROR nlError = NL_ERROR_SUCCESS;
+ static const NL_POLICY ovsDatapathSetPolicy[] = {
+ [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .maxLen = IFNAMSIZ },
+ [OVS_DP_ATTR_UPCALL_PID] = { .type = NL_A_U32, .optional = TRUE },
+ [OVS_DP_ATTR_USER_FEATURES] = { .type = NL_A_U32, .optional = TRUE },
+ };
+ PNL_ATTR dpAttrs[ARRAY_SIZE(ovsDatapathSetPolicy)];
+
+ UNREFERENCED_PARAMETER(msgOut);
+
+ /* input buffer has been validated while validating write dev op. */
+ ASSERT(msgIn != NULL && usrParamsCtx->inputLength >= sizeof *msgIn);
+
+ /* Parse any attributes in the request. */
+ if (usrParamsCtx->ovsMsg->genlMsg.cmd == OVS_DP_CMD_SET ||
+ usrParamsCtx->ovsMsg->genlMsg.cmd == OVS_DP_CMD_NEW) {
+ if (!NlAttrParse((PNL_MSG_HDR)msgIn,
+ NLMSG_HDRLEN + GENL_HDRLEN + OVS_HDRLEN,
+ NlMsgAttrsLen((PNL_MSG_HDR)msgIn),
+ ovsDatapathSetPolicy, dpAttrs, ARRAY_SIZE(dpAttrs))) {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /*
+ * XXX: Not clear at this stage if there's any role for the
+ * OVS_DP_ATTR_UPCALL_PID and OVS_DP_ATTR_USER_FEATURES attributes passed
+ * from userspace.
+ */
+
+ } else {
+ RtlZeroMemory(dpAttrs, sizeof dpAttrs);
+ }
+
+ /* Output buffer has been validated while validating transact dev op. */
+ ASSERT(msgOut != NULL && usrParamsCtx->outputLength >= sizeof *msgOut);
+
+ NlBufInit(&nlBuf, usrParamsCtx->outputBuffer, usrParamsCtx->outputLength);
+
+ if (dpAttrs[OVS_DP_ATTR_NAME] != NULL) {
+ if (!OvsCompareString(NlAttrGet(dpAttrs[OVS_DP_ATTR_NAME]),
+ OVS_SYSTEM_DP_NAME)) {
+
+ /* Creation of new datapaths is not supported. */
+ if (usrParamsCtx->ovsMsg->genlMsg.cmd == OVS_DP_CMD_SET) {
+ nlError = NL_ERROR_NOTSUPP;
+ goto cleanup;
+ }
+
+ nlError = NL_ERROR_NODEV;
+ goto cleanup;
+ }
+ } else if ((UINT32)msgIn->ovsHdr.dp_ifindex != gOvsSwitchContext->dpNo) {
+ nlError = NL_ERROR_NODEV;
+ goto cleanup;
+ }
+
+ if (usrParamsCtx->ovsMsg->genlMsg.cmd == OVS_DP_CMD_NEW) {
+ nlError = NL_ERROR_EXIST;
+ goto cleanup;
+ }
+
+ status = OvsDpFillInfo(gOvsSwitchContext, msgIn, &nlBuf);
+
+ *replyLen = NlBufSize(&nlBuf);
+
+cleanup:
+ if (nlError != NL_ERROR_SUCCESS) {
+ POVS_MESSAGE_ERROR msgError = (POVS_MESSAGE_ERROR)
+ usrParamsCtx->outputBuffer;
+
+ NlBuildErrorMsg(msgIn, msgError, nlError);
+ *replyLen = msgError->nlMsg.nlmsgLen;
+ }
+
+ return STATUS_SUCCESS;
+}
+
+
+NTSTATUS
OvsSetupDumpStart(POVS_USER_PARAMS_CONTEXT usrParamsCtx)
{
POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
* This operation should be setting up the dump state. If there's any
* previous state, clear it up so as to set it up afresh.
*/
- if (instance->dumpState.ovsMsg != NULL) {
- FreeUserDumpState(instance);
- }
+ FreeUserDumpState(instance);
return InitUserDumpState(instance, msgIn);
}
+
/*
* --------------------------------------------------------------------------
* Utility function to map the output buffer in an IRP. The buffer is assumed
return STATUS_SUCCESS;
}
-#endif /* OVS_USE_NL_INTERFACE */
+/*
+ * --------------------------------------------------------------------------
+ * Utility function to fill up information about the state of a port in a reply
+ * to* userspace.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsPortFillInfo(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ POVS_EVENT_ENTRY eventEntry,
+ PNL_BUFFER nlBuf)
+{
+ NTSTATUS status;
+ BOOLEAN ok;
+ OVS_MESSAGE msgOutTmp;
+ PNL_MSG_HDR nlMsg;
+ POVS_VPORT_ENTRY vport;
+
+ ASSERT(NlBufAt(nlBuf, 0, 0) != 0 && nlBuf->bufRemLen >= sizeof msgOutTmp);
+
+ msgOutTmp.nlMsg.nlmsgType = OVS_WIN_NL_VPORT_FAMILY_ID;
+ msgOutTmp.nlMsg.nlmsgFlags = 0; /* XXX: ? */
+
+ /* driver intiated messages should have zerp seq number*/
+ msgOutTmp.nlMsg.nlmsgSeq = 0;
+ msgOutTmp.nlMsg.nlmsgPid = usrParamsCtx->ovsInstance->pid;
+
+ msgOutTmp.genlMsg.version = nlVportFamilyOps.version;
+ msgOutTmp.genlMsg.reserved = 0;
+
+ /* we don't have netdev yet, treat link up/down a adding/removing a port*/
+ if (eventEntry->status & (OVS_EVENT_LINK_UP | OVS_EVENT_CONNECT)) {
+ msgOutTmp.genlMsg.cmd = OVS_VPORT_CMD_NEW;
+ } else if (eventEntry->status &
+ (OVS_EVENT_LINK_DOWN | OVS_EVENT_DISCONNECT)) {
+ msgOutTmp.genlMsg.cmd = OVS_VPORT_CMD_DEL;
+ } else {
+ ASSERT(FALSE);
+ return STATUS_UNSUCCESSFUL;
+ }
+ msgOutTmp.ovsHdr.dp_ifindex = gOvsSwitchContext->dpNo;
+
+ ok = NlMsgPutHead(nlBuf, (PCHAR)&msgOutTmp, sizeof msgOutTmp);
+ if (!ok) {
+ status = STATUS_INVALID_BUFFER_SIZE;
+ goto cleanup;
+ }
+
+ vport = OvsFindVportByPortNo(gOvsSwitchContext, eventEntry->portNo);
+ if (!vport) {
+ status = STATUS_DEVICE_DOES_NOT_EXIST;
+ goto cleanup;
+ }
+
+ ok = NlMsgPutTailU32(nlBuf, OVS_VPORT_ATTR_PORT_NO, eventEntry->portNo) &&
+ NlMsgPutTailU32(nlBuf, OVS_VPORT_ATTR_TYPE, vport->ovsType) &&
+ NlMsgPutTailU32(nlBuf, OVS_VPORT_ATTR_UPCALL_PID,
+ vport->upcallPid) &&
+ NlMsgPutTailString(nlBuf, OVS_VPORT_ATTR_NAME, vport->ovsName);
+ if (!ok) {
+ status = STATUS_INVALID_BUFFER_SIZE;
+ goto cleanup;
+ }
+
+ /* XXXX Should we add the port stats attributes?*/
+ nlMsg = (PNL_MSG_HDR)NlBufAt(nlBuf, 0, 0);
+ nlMsg->nlmsgLen = NlBufSize(nlBuf);
+ status = STATUS_SUCCESS;
+
+cleanup:
+ return status;
+}
+
+
+/*
+ * --------------------------------------------------------------------------
+ * Handler for reading events from the driver event queue. This handler is
+ * executed when user modes issues a socket receive on a socket assocaited
+ * with the MC group for events.
+ * XXX user mode should read multiple events in one system call
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsReadEventCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+#ifdef DBG
+ POVS_MESSAGE msgOut = (POVS_MESSAGE)usrParamsCtx->outputBuffer;
+ POVS_OPEN_INSTANCE instance =
+ (POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
+#endif
+ NL_BUFFER nlBuf;
+ NTSTATUS status;
+ OVS_EVENT_ENTRY eventEntry;
+
+ ASSERT(usrParamsCtx->devOp == OVS_READ_DEV_OP);
+
+ /* Should never read events with a dump socket */
+ ASSERT(instance->dumpState.ovsMsg == NULL);
+
+ /* Must have an event queue */
+ ASSERT(instance->eventQueue != NULL);
+
+ /* Output buffer has been validated while validating read dev op. */
+ ASSERT(msgOut != NULL && usrParamsCtx->outputLength >= sizeof *msgOut);
+
+ NlBufInit(&nlBuf, usrParamsCtx->outputBuffer, usrParamsCtx->outputLength);
+
+ /* remove an event entry from the event queue */
+ status = OvsRemoveEventEntry(usrParamsCtx->ovsInstance, &eventEntry);
+ if (status != STATUS_SUCCESS) {
+ /* If there were not elements, read should return no data. */
+ status = STATUS_SUCCESS;
+ *replyLen = 0;
+ goto cleanup;
+ }
+
+ status = OvsPortFillInfo(usrParamsCtx, &eventEntry, &nlBuf);
+ if (status == NDIS_STATUS_SUCCESS) {
+ *replyLen = NlBufSize(&nlBuf);
+ }
+
+cleanup:
+ return status;
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Handler for reading missed pacckets from the driver event queue. This
+ * handler is executed when user modes issues a socket receive on a socket
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsReadPacketCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+#ifdef DBG
+ POVS_MESSAGE msgOut = (POVS_MESSAGE)usrParamsCtx->outputBuffer;
+#endif
+ POVS_OPEN_INSTANCE instance =
+ (POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
+ NTSTATUS status;
+
+ ASSERT(usrParamsCtx->devOp == OVS_READ_DEV_OP);
+
+ /* Should never read events with a dump socket */
+ ASSERT(instance->dumpState.ovsMsg == NULL);
+
+ /* Must have an packet queue */
+ ASSERT(instance->packetQueue != NULL);
+
+ /* Output buffer has been validated while validating read dev op. */
+ ASSERT(msgOut != NULL && usrParamsCtx->outputLength >= sizeof *msgOut);
+
+ /* Read a packet from the instance queue */
+ status = OvsReadDpIoctl(instance->fileObject, usrParamsCtx->outputBuffer,
+ usrParamsCtx->outputLength, replyLen);
+ return status;
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Handler for the subscription for a packet queue
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsSubscribePacketCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ NDIS_STATUS status;
+ BOOLEAN rc;
+ UINT8 join;
+ UINT32 pid;
+ const NL_POLICY policy[] = {
+ [OVS_NL_ATTR_PACKET_PID] = {.type = NL_A_U32 },
+ [OVS_NL_ATTR_PACKET_SUBSCRIBE] = {.type = NL_A_U8 }
+ };
+ PNL_ATTR attrs[ARRAY_SIZE(policy)];
+
+ UNREFERENCED_PARAMETER(replyLen);
+
+ POVS_OPEN_INSTANCE instance =
+ (POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
+ POVS_MESSAGE msgIn = (POVS_MESSAGE)usrParamsCtx->inputBuffer;
+
+ rc = NlAttrParse(&msgIn->nlMsg, sizeof (*msgIn),
+ NlMsgAttrsLen((PNL_MSG_HDR)msgIn), policy, attrs, ARRAY_SIZE(attrs));
+ if (!rc) {
+ status = STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+
+ join = NlAttrGetU8(attrs[OVS_NL_ATTR_PACKET_PID]);
+ pid = NlAttrGetU32(attrs[OVS_NL_ATTR_PACKET_PID]);
+
+ /* The socket subscribed with must be the same socket we perform receive*/
+ ASSERT(pid == instance->pid);
+
+ status = OvsSubscribeDpIoctl(instance, pid, join);
+
+ /*
+ * XXX Need to add this instance to a global data structure
+ * which hold all packet based instances. The data structure (hash)
+ * should be searched through the pid field of the instance for
+ * placing the missed packet into the correct queue
+ */
+done:
+ return status;
+}
+
+/*
+ * --------------------------------------------------------------------------
+ * Handler for queueing an IRP used for missed packet notification. The IRP is
+ * completed when a packet received and mismatched. STATUS_PENDING is returned
+ * on success. User mode keep a pending IRP at all times.
+ * --------------------------------------------------------------------------
+ */
+static NTSTATUS
+OvsPendPacketCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
+ UINT32 *replyLen)
+{
+ UNREFERENCED_PARAMETER(replyLen);
+
+ POVS_OPEN_INSTANCE instance =
+ (POVS_OPEN_INSTANCE)usrParamsCtx->ovsInstance;
+
+ /*
+ * XXX access to packet queue must be through acquiring a lock as user mode
+ * could unsubscribe and the instnace will be freed.
+ */
+ return OvsWaitDpIoctl(usrParamsCtx->irp, instance->fileObject);
+}
projects / cascardo / ovs.git / blobdiff