/* Delete subcription from RAN Function */
memcpy(&requestId, &((RicSubscription *)ricSubscriptionNode->node)->requestId, sizeof(RicRequestId));
cmLListDelFrm(&ranFuncDb->subscriptionList, ricSubscriptionNode);
- DU_FREE(ricSubscriptionNode->node, sizeof(RicSubscription));
- DU_FREE(ricSubscriptionNode, sizeof(CmLList));
-
+ deleteRicSubscriptionNode(ricSubscriptionNode);
+ ricSubscriptionNode = NULLP;
convertDuCauseToE2Cause(statsRsp->statsGrpRejectedList[0].cause, &failureCause);
/* Send RIC subscription failure to RIC */
}
else
{
+ /* Once RIC subscription is successful, mark the config action as unknown */
+ ricSubscriptionInfo->action = CONFIG_UNKNOWN;
+
/* Start RIC Subscription reporting timer */
switch(ricSubscriptionInfo->eventTriggerDefinition.formatType)
{
*
* @params[in]
* Type of interface
- * Component action type
+ * Component Id
* Pointer to E2 component node to be searched
* @return CmLList
*
* ****************************************************************/
-E2NodeComponent *fetchE2NodeComponentInfo(InterfaceType interfaceType, uint8_t componentActionType, CmLList **e2ComponentNode)
+E2NodeComponent *fetchE2NodeComponentInfo(InterfaceType interfaceType, uint64_t componentId, CmLList **e2ComponentNode)
{
E2NodeComponent *e2NodeComponentInfo=NULLP;
while(*e2ComponentNode)
{
e2NodeComponentInfo = (E2NodeComponent*)((*e2ComponentNode)->node);
- if((e2NodeComponentInfo->interfaceType == interfaceType) && (e2NodeComponentInfo->componentActionType == componentActionType))
+ if((e2NodeComponentInfo->interfaceType == interfaceType) && (e2NodeComponentInfo->componentId == componentId))
{
-
break;
}
/*******************************************************************
*
- * @brief add or modify E2NodeComponent list
+ * @brief fill E2 node component rsp info
*
* @details
*
- * Function : addOrModifyE2NodeComponent
+ * Function : fillE2NodeComponentRspInfo
*
- * Functionality: add or modify E2NodeComponent list
+ * Functionality: fill E2 Node Component rsp info
+ *
+ * @parameter
+ * Type of interface
+ * Component action type
+ * Size of buffer which needs to be store
+ * buffer string which needs to be store
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+
+uint8_t fillE2NodeComponentRspInfo(InterfaceType interfaceType, uint64_t componentId, uint8_t action, uint8_t bufSize, char *bufString)
+{
+ E2NodeConfig *configInfo=NULLP;
+ E2NodeComponent *e2NodeComponentInfo= NULLP;
+ CmLList *node = NULLP;
+
+ e2NodeComponentInfo = fetchE2NodeComponentInfo(interfaceType, componentId, &node);
+ if(!e2NodeComponentInfo)
+ {
+ DU_LOG("\nERROR --> E2AP : Unable to find the node");
+ return RFAILED;
+ }
+
+ switch(action)
+ {
+ case E2_NODE_COMPONENT_ADD:
+ {
+ configInfo = e2NodeComponentInfo->addConfiguration;
+ break;
+ }
+ case E2_NODE_COMPONENT_UPDATE:
+ {
+ configInfo = e2NodeComponentInfo->updateConfiguration;
+ break;
+ }
+ default:
+ {
+ DU_LOG("\nERROR --> E2AP : Invalid action %d received",action);
+ return RFAILED;
+ }
+ }
+
+ if(configInfo->componentRequestPart== NULLP)
+ {
+ DU_LOG("\nERROR --> E2AP : E2 node Component request part is not present");
+ return RFAILED;
+ }
+
+ configInfo->rspBufSize = bufSize;
+ DU_ALLOC(configInfo->componentResponsePart, bufSize);
+ if(configInfo->componentResponsePart == NULLP)
+ {
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed to store the encoding of rsp");
+ return RFAILED;
+ }
+ memcpy(configInfo->componentResponsePart, bufString, configInfo->rspBufSize);
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief add E2 node component req info
+ *
+ * @details
+ *
+ * Function : addE2NodeComponent
+ *
+ * Functionality: add E2 node component req info
*
* @parameter
* Type of interface
* Component action type
- * boolean variable to check req or rsp msg type
* Size of buffer which needs to be store
* buffer string which needs to be store
* @return ROK - success
*
******************************************************************/
-uint8_t addOrModifyE2NodeComponent(InterfaceType interfaceType, uint8_t action, bool reqPart, uint8_t bufSize, char *bufString)
+uint8_t addE2NodeComponent(InterfaceType interfaceType, uint64_t componentId, uint8_t bufSize, char *bufString)
{
- E2NodeComponent *e2NodeComponentInfo= NULL;
+ E2NodeComponent *e2NodeComponentInfo= NULLP;
CmLList *node = NULLP;
- if(reqPart == true)
+ DU_ALLOC(e2NodeComponentInfo, sizeof(E2NodeComponent));
+ if(!e2NodeComponentInfo)
{
- DU_ALLOC(e2NodeComponentInfo, sizeof(E2NodeComponent));
- if(!e2NodeComponentInfo)
- {
- DU_LOG("\nERROR --> E2AP : Memory allocation failed for e2NodeComponentInfo in %s",__func__);
- return RFAILED;
- }
- e2NodeComponentInfo->interfaceType =interfaceType;
- e2NodeComponentInfo->componentId=duCfgParam.duId;
- e2NodeComponentInfo->componentActionType = action;
- e2NodeComponentInfo->reqBufSize = bufSize;
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed in %s at %d",__func__,__LINE__);
+ return RFAILED;
+ }
+ e2NodeComponentInfo->interfaceType =interfaceType;
+ e2NodeComponentInfo->componentId=componentId;
- DU_ALLOC(e2NodeComponentInfo->componentRequestPart, bufSize);
- if(e2NodeComponentInfo->componentRequestPart == NULLP)
- {
- DU_LOG("\nERROR --> E2AP : Memory allocation failed for componentRequestPart");
- DU_FREE(e2NodeComponentInfo, sizeof(E2NodeComponent));
- return RFAILED;
- }
- memcpy(e2NodeComponentInfo->componentRequestPart, bufString, e2NodeComponentInfo->reqBufSize);
- DU_ALLOC(node, sizeof(CmLList));
- if(node)
+ DU_ALLOC(e2NodeComponentInfo->addConfiguration, sizeof(E2NodeConfig));
+ if(!e2NodeComponentInfo->addConfiguration)
+ {
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed in %s at %d",__func__,__LINE__);
+ return RFAILED;
+ }
+
+ e2NodeComponentInfo->addConfiguration->reqBufSize = bufSize;
+
+ DU_ALLOC(e2NodeComponentInfo->addConfiguration->componentRequestPart, bufSize);
+ if(e2NodeComponentInfo->addConfiguration->componentRequestPart == NULLP)
+ {
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed in %s at %d",__func__,__LINE__);
+ DU_FREE(e2NodeComponentInfo, sizeof(E2NodeComponent));
+ return RFAILED;
+ }
+ memcpy(e2NodeComponentInfo->addConfiguration->componentRequestPart, bufString,\
+ e2NodeComponentInfo->addConfiguration->reqBufSize);
+
+ DU_ALLOC(node, sizeof(CmLList));
+ if(node)
+ {
+ node->node = (PTR) e2NodeComponentInfo;
+ cmLListAdd2Tail(&duCb.e2apDb.e2NodeComponentList, node);
+ }
+ else
+ {
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed in %s at %d",__func__,__LINE__);
+ DU_FREE(e2NodeComponentInfo->addConfiguration->componentRequestPart, bufSize);
+ DU_FREE(e2NodeComponentInfo->addConfiguration, sizeof(E2NodeConfig));
+ DU_FREE(e2NodeComponentInfo, sizeof(E2NodeComponent));
+ return RFAILED;
+ }
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief update E2 node component req info
+ *
+ * @details
+ *
+ * Function : updateE2NodeComponent
+ *
+ * Functionality: update E2 node component req info
+ *
+ * @parameter
+ * Type of interface
+ * Size of buffer which needs to be store
+ * buffer string which needs to be store
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ ******************************************************************/
+
+uint8_t updateE2NodeComponent(InterfaceType interfaceType, uint64_t componentId, uint8_t bufSize, char *bufString)
+{
+ E2NodeComponent *e2NodeComponentInfo= NULLP;
+ CmLList *node = NULLP;
+
+ e2NodeComponentInfo = fetchE2NodeComponentInfo(interfaceType, componentId, &node);
+ if(!e2NodeComponentInfo)
+ {
+ DU_LOG("\nERROR --> E2AP : Received null information in %s",__func__);
+ return RFAILED;
+ }
+
+ DU_ALLOC(e2NodeComponentInfo->updateConfiguration, sizeof(E2NodeConfig));
+ if(!e2NodeComponentInfo->updateConfiguration)
+ {
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed in %s at %d",__func__,__LINE__);
+ return RFAILED;
+ }
+
+ e2NodeComponentInfo->updateConfiguration->reqBufSize = bufSize;
+
+ DU_ALLOC(e2NodeComponentInfo->updateConfiguration->componentRequestPart, bufSize);
+ if(e2NodeComponentInfo->updateConfiguration->componentRequestPart == NULLP)
+ {
+ DU_LOG("\nERROR --> E2AP : Memory allocation failed in %s at %d",__func__,__LINE__);
+ DU_FREE(e2NodeComponentInfo->updateConfiguration, sizeof(E2NodeConfig));
+ return RFAILED;
+ }
+
+ memcpy(e2NodeComponentInfo->updateConfiguration->componentRequestPart, bufString,\
+ e2NodeComponentInfo->updateConfiguration->reqBufSize);
+ return ROK;
+
+}
+
+/*******************************************************************
+ *
+ * @brief delete E2 node component req info
+ *
+ * @details
+ *
+ * Function : deleteE2NodeComponent
+ *
+ * Functionality: delete E2 node component req info
+ *
+ * @parameter
+ * Type of interface
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ ******************************************************************/
+
+uint8_t deleteE2NodeComponent(InterfaceType interfaceType, uint64_t componentId)
+{
+ E2NodeComponent *e2NodeComponentInfo= NULLP;
+ CmLList *node = NULLP;
+
+ e2NodeComponentInfo = fetchE2NodeComponentInfo(interfaceType, componentId, &node);
+ if(!e2NodeComponentInfo)
+ {
+ DU_LOG("\nERROR --> E2AP : Received null information in %s",__func__);
+ return RFAILED;
+ }
+
+ e2NodeComponentInfo->deleteConfiguration = true;
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief fill E2 node component req info
+ *
+ * @details
+ *
+ * Function : fillE2NodeComponentReqInfo
+ *
+ * Functionality: fill E2 node component req info
+ *
+ * @parameter
+ * Type of interface
+ * Component action type
+ * Size of buffer which needs to be store
+ * buffer string which needs to be store
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ ******************************************************************/
+
+uint8_t fillE2NodeComponentReqInfo(InterfaceType interfaceType, uint64_t componentId, uint8_t action, uint8_t bufSize, char *bufString)
+{
+ switch(action)
+ {
+ case E2_NODE_COMPONENT_ADD:
+ {
+ if(addE2NodeComponent(interfaceType, componentId, bufSize, bufString) != ROK)
+ {
+ DU_LOG("\nERROR --> E2AP : Failed to add e2 node component");
+ return RFAILED;
+ }
+ break;
+ }
+ case E2_NODE_COMPONENT_UPDATE:
+ {
+ if(updateE2NodeComponent(interfaceType, componentId, bufSize, bufString) != ROK)
+ {
+ DU_LOG("\nERROR --> E2AP : Failed to update e2 node component");
+ return RFAILED;
+ }
+ break;
+ }
+ case E2_NODE_COMPONENT_DEL:
+ {
+ if(deleteE2NodeComponent(interfaceType, componentId) != ROK)
+ {
+ DU_LOG("\nERROR --> E2AP : Failed to delete e2 node component");
+ return RFAILED;
+ }
+ break;
+ }
+ default:
+ {
+ DU_LOG("\nERROR --> E2AP : Invalid action %d received",action);
+ return RFAILED;
+ }
+ }
+
+ return ROK;
+}
+
+/******************************************************************
+ *
+ * @brief Delete measured Value list
+ *
+ * @details
+ *
+ * Function : deleteMeasuredValueList
+ *
+ * Functionality: Delete measured Value list
+ *
+ * @params[in] List of measured Value
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void deleteMeasuredValueList(CmLListCp *measuredValueList)
+{
+ CmLList *measValNode = NULLP;
+
+ CM_LLIST_FIRST_NODE(measuredValueList, measValNode);
+
+ while(measValNode)
+ {
+ cmLListDelFrm(measuredValueList, measValNode);
+ DU_FREE(measValNode->node, sizeof(double));
+ DU_FREE(measValNode, sizeof(CmLList));
+ CM_LLIST_FIRST_NODE(measuredValueList, measValNode);
+ }
+}
+
+/******************************************************************
+ *
+ * @brief Delete Measurement Info List
+ *
+ * @details
+ *
+ * Function : deleteMeasurementInfoList
+ *
+ * Functionality: Delete Measurement Info List
+ *
+ * @params[in] List of Measurement Info List
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void deleteMeasurementInfoList(CmLListCp *measInfoList)
+{
+ CmLList *measInfoNode = NULLP;
+ MeasurementInfo *measInfo = NULLP;
+
+ CM_LLIST_FIRST_NODE(measInfoList, measInfoNode);
+ while(measInfoNode)
+ {
+ measInfo = (MeasurementInfo *)measInfoNode->node;
+ cmLListDelFrm(measInfoList, measInfoNode);
+ deleteMeasuredValueList(&measInfo->measuredValue);
+ DU_FREE(measInfo, sizeof(MeasurementInfo));
+ DU_FREE(measInfoNode, sizeof(CmLList));
+ CM_LLIST_FIRST_NODE(measInfoList, measInfoNode);
+ }
+}
+
+/******************************************************************
+ *
+ * @brief Delete Ric subscription action
+ *
+ * @details
+ *
+ * Function : deleteActionSequence
+ *
+ * Functionality: Delete Ric subscription action
+ *
+ * @params[in] Action info
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void deleteActionSequence(ActionInfo *action)
+{
+ ActionDefinition *definition=NULLP;
+ definition= &action->definition;
+
+ switch(definition->formatType)
+ {
+ case 1:
+ {
+ deleteMeasurementInfoList(&definition->choice.format1.measurementInfoList);
+ break;
+ }
+
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ default:
{
- node->node = (PTR) e2NodeComponentInfo;
- cmLListAdd2Tail(&duCb.e2apDb.e2NodeComponentList, node);
+ DU_LOG("\nERROR --> E2AP : Format %d does not supported", definition->formatType);
+ break;
}
- else
+ }
+ memset(action, 0, sizeof(ActionInfo));
+ action->actionId = -1;
+}
+
+/******************************************************************
+ *
+ * @brief Delete Ric subscription node
+ *
+ * @details
+ *
+ * Function : deleteRicSubscriptionNode
+ *
+ * Functionality: Delete Ric subscription node
+ *
+ * @params[in] Ric subscription info
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void deleteRicSubscriptionNode(CmLList *subscriptionNode)
+{
+ uint8_t actionIdx=0;
+ RicSubscription *ricSubscriptionInfo = NULLP;
+
+ ricSubscriptionInfo = (RicSubscription*)subscriptionNode->node;
+
+ for(actionIdx = 0; actionIdx < MAX_RIC_ACTION; actionIdx++)
+ {
+ if(ricSubscriptionInfo->actionSequence[actionIdx].actionId > -1)
{
- DU_LOG("\nERROR --> E2AP : Memory allocation failed for e2NodeComponentList node");
- DU_FREE(e2NodeComponentInfo->componentRequestPart, bufSize);
- DU_FREE(e2NodeComponentInfo, sizeof(E2NodeComponent));
- return RFAILED;
+ deleteActionSequence(&ricSubscriptionInfo->actionSequence[actionIdx]);
}
}
- else
+
+ if(duChkTmr((PTR)ricSubscriptionInfo, EVENT_RIC_SUBSCRIPTION_REPORTING_TMR) == TRUE)
{
- if(duCb.e2apDb.e2NodeComponentList.count)
+ duStopTmr((PTR)ricSubscriptionInfo, EVENT_RIC_SUBSCRIPTION_REPORTING_TMR);
+ }
+
+ memset(ricSubscriptionInfo, 0, sizeof(RicSubscription));
+ DU_FREE(subscriptionNode->node, sizeof(RicSubscription));
+ DU_FREE(subscriptionNode, sizeof(CmLList));
+}
+
+/******************************************************************
+ *
+ * @brief Delete ric subscription list from the database
+ *
+ * @details
+ *
+ * Function : deleteRicSubscriptionList
+ *
+ * Functionality: Delete ric subscription list
+ *
+ * @params[in]
+ * Subscription List to be deleted
+
+ * @return void
+ *
+ * ****************************************************************/
+void deleteRicSubscriptionList(CmLListCp *subscriptionList)
+{
+ CmLList *subscriptionNode=NULLP;
+
+ CM_LLIST_FIRST_NODE(subscriptionList, subscriptionNode);
+ while(subscriptionNode)
+ {
+ /* TODO - Remove subscription information from MAC and SCH as well */
+ cmLListDelFrm(subscriptionList, subscriptionNode);
+ deleteRicSubscriptionNode(subscriptionNode);
+ CM_LLIST_FIRST_NODE(subscriptionList, subscriptionNode);
+ }
+}
+
+/*******************************************************************
+ *
+ * @brief Find all RIC subscriptions to be deleted in all RAN
+ * Functions
+ *
+ * @details
+ *
+ * Function : fetchRicSubsToBeDeleted
+ *
+ * Functionality: Find all RIC subscriptions to be deleted in all
+ * RAN functions and store in a temporary list
+ *
+ * @parameter Temporary list to store subscriptions to be deleted
+ * @return void
+ *
+ ******************************************************************/
+void fetchRicSubsToBeDeleted(CmLListCp *ricSubsToBeDelList)
+{
+ uint16_t ranFuncIdx = 0;
+ CmLList *subsNode = NULLP;
+ CmLList *subsToDelNode = NULLP;
+
+ for(ranFuncIdx = 0; ranFuncIdx < MAX_RAN_FUNCTION; ranFuncIdx++)
+ {
+ if(duCb.e2apDb.ranFunction[ranFuncIdx].id > 0)
{
- e2NodeComponentInfo = fetchE2NodeComponentInfo(interfaceType, action, &node);
- if(e2NodeComponentInfo->componentRequestPart== NULLP)
+ CM_LLIST_FIRST_NODE(&duCb.e2apDb.ranFunction[ranFuncIdx].subscriptionList, subsNode);
+ while(subsNode)
{
- DU_LOG("\nERROR --> E2AP : E2 node Component request part is not present");
- return RFAILED;
- }
-
- e2NodeComponentInfo->rspBufSize = bufSize;
- DU_ALLOC(e2NodeComponentInfo->componentResponsePart, bufSize);
- if(e2NodeComponentInfo->componentResponsePart == NULLP)
- {
- DU_LOG("\nERROR --> E2AP : Memory allocation failed to store the encoding of rsp");
- return RFAILED;
+ if(((RicSubscription *)subsNode->node)->action == CONFIG_DEL)
+ {
+ DU_ALLOC(subsToDelNode, sizeof(CmLList));
+ if(!subsToDelNode)
+ {
+ DU_LOG("\nERROR --> E2AP : %s: Memory allocation failure at %d", __func__, __LINE__);
+ return;
+ }
+ subsToDelNode->node = subsNode->node;
+ cmLListAdd2Tail(ricSubsToBeDelList, subsToDelNode);
+ }
+ subsToDelNode = NULLP;
+ subsNode = subsNode->next;
}
- memcpy(e2NodeComponentInfo->componentResponsePart, bufString, e2NodeComponentInfo->rspBufSize);
- return ROK;
}
- else
+ }
+}
+
+/******************************************************************
+ *
+ * @brief Delete e2 node information from the database
+ *
+ * @details
+ *
+ * Function : removeE2NodeInformation
+ *
+ * Functionality: Delete e2 node information from the database
+ *
+ * @params[in]
+ *
+ * @return void
+ *
+******************************************************************/
+void removeE2NodeInformation()
+{
+ uint16_t ranFuncIdx = 0;
+
+ DU_LOG("\nINFO --> E2AP : Deleting all the E2 node configuration");
+ for(ranFuncIdx=0; ranFuncIdx<MAX_RAN_FUNCTION; ranFuncIdx++)
+ {
+ if(duCb.e2apDb.ranFunction[ranFuncIdx].id >0)
{
- DU_LOG("\nERROR --> E2AP : Unable to find the node");
- return RFAILED;
+ deleteRicSubscriptionList(&(duCb.e2apDb.ranFunction[ranFuncIdx].subscriptionList));
+ memset(&(duCb.e2apDb.ranFunction[ranFuncIdx].pendingSubsRspInfo), 0, MAX_PENDING_SUBSCRIPTION_RSP*sizeof(PendingSubsRspInfo));
}
- }
+ }
+ memset(&duCb.e2apDb.ricId, 0, sizeof(GlobalRicId));
+ duCb.e2apDb.numOfTNLAssoc = 0;
+ memset(&duCb.e2apDb.tnlAssoc, 0, MAX_TNL_ASSOCIATION*sizeof(TNLAssociation));
+ memset(&ricParams, 0, sizeof(DuSctpDestCb));
+}
+
+/*******************************************************************
+ *
+ * @brief Extract statistics received from DU layers and delete
+ * Ric subscription info
+ *
+ * @details
+ *
+ * Function :e2ProcStatsDeleteRsp
+ *
+ * Functionality: Extract statistics received from DU layers
+ * and delete ric subscription iformation form db
+ *
+ * @params[in] Statistics delete rsp from MAC
+ * @return ROK-success
+ * RFAILED-failure
+ *
+ * ****************************************************************/
+uint8_t e2ProcStatsDeleteRsp(MacStatsDeleteRsp *statsDeleteRsp)
+{
+ RanFunction *ranFuncDb = NULLP;
+ CmLList *ricSubscriptionNode = NULLP;
+ RicSubscription *ricSubscriptionInfo = NULLP;
+ E2FailureCause failureCause;
+
+ /* Fetch RAN Function and Subscription DB using subscription Id received
+ * in statistics delete response */
+ if(fetchSubsInfoFromSubsId(statsDeleteRsp->subscriptionId, &ranFuncDb, &ricSubscriptionNode, &ricSubscriptionInfo) != ROK)
+ {
+ DU_LOG("\nERROR --> E2AP : extractStatsMeasurement: Failed to fetch subscriprtion details");
+ return RFAILED;
+ }
+
+ deleteRicSubscriptionNode(ricSubscriptionNode);
+#if 0
+ /* TODO */
+ if(statsDeleteRsp->result == MAC_DU_APP_RSP_NOK && statsDeleteRsp->status == STATS_ID_NOT_FOUND)
+ {
+ failureCause->causeType =E2_RIC_REQUEST;
+ failureCause->cause = E2_REQUEST_INFORMATION_UNAVAILABLE;
+ BuildAndSendRicSubscriptionDeleteFailure(ricSubscriptionInfo->ranFuncId, ricSubscriptionInfo->requestId, failureCause);
+ }
+ else
+ {
+ BuildAndSendRicSubscriptionDeleteResponse(ricSubscriptionInfo->ranFuncId, ricSubscriptionInfo->requestId);
+ }
+#endif
return ROK;
}
Code Review / o-du / l2.git / blobdiff