rf_AllocBuffer
xorTargetBuf = rf_AllocBuffer(raidPtr, dag_h, rf_RaidAddressToByte(raidPtr, failedPDA->numSector));
xorNode->results[0] = rf_AllocBuffer(raidPtr, dag_h, rf_RaidAddressToByte(raidPtr, raidPtr->Layout.sectorsPerStripeUnit));
tmpreadDataNode->params[1].p = rf_AllocBuffer(raidPtr, dag_h, pda->numSector << raidPtr->logBytesPerSector);
tmpreadParityNode->params[1].p = rf_AllocBuffer(raidPtr, dag_h, pda->numSector << raidPtr->logBytesPerSector);
tmpreadQNode->params[1].p = rf_AllocBuffer(raidPtr, dag_h,
pda->bufPtr = rf_AllocBuffer(raidPtr, dag_h, pda->numSector << raidPtr->logBytesPerSector);
pda->bufPtr = rf_AllocBuffer(raidPtr, dag_h, pda->numSector << raidPtr->logBytesPerSector);
*rpBufPtr = rf_AllocBuffer(raidPtr, dag_h, failedPDA->numSector << raidPtr->logBytesPerSector);
void *rf_AllocBuffer(RF_Raid_t *, RF_DagHeader_t *, int);
readDataNodes[i].params[1].p = rf_AllocBuffer(raidPtr, dag_h, pda->numSector << raidPtr->logBytesPerSector); /* buffer to hold old data */
readParityNodes[i].params[1].p = rf_AllocBuffer(raidPtr, dag_h, pda->numSector << raidPtr->logBytesPerSector); /* buffer to hold old parity */