resolved comments

README.md

@@ -203,6 +203,9 @@ To learn about a specific command, just include the name of the command (For exa
 - CPK options: 
     * `AZURE_STORAGE_CPK_ENCRYPTION_KEY`: Customer provided base64-encoded AES-256 encryption key value.
     * `AZURE_STORAGE_CPK_ENCRYPTION_KEY_SHA256`: Base64-encoded SHA256 of the cpk encryption key.
+- Custom component options:
+    * `BLOBFUSE_PLUGIN_DIRECTORY`: Specifies the directory path containing the plugin .so files.
+    * `BLOBFUSE_PLUGIN_NAMES`:  Specifies the file names as a colon-separated list of `.so` files located in plugin directory specified by `BLOBFUSE_PLUGIN_DIRECTORY`.
 
 
 ## Config Guide

component/block_cache/block_cache.go

@@ -1536,10 +1536,9 @@ func (bc *BlockCache) stageZeroBlock(handle *handlemap.Handle, tryCnt int) (stri
 
 	log.Debug("BlockCache::stageZeroBlock : Staging zero block for %v=>%v, try = %v", handle.ID, handle.Path, tryCnt)
 	err := bc.NextComponent().StageData(internal.StageDataOptions{
-		Name:   handle.Path,
-		Data:   bc.blockPool.zeroBlock.data[:],
-		Offset: 0,
-		Id:     id,
+		Name: handle.Path,
+		Data: bc.blockPool.zeroBlock.data[:],
+		Id:   id,
 	})
 
 	if err != nil {

sample_custom_component1/main.go

@@ -11,6 +11,8 @@ import (
 )
 
 // SAMPLE EXTERNAL COMPONENT IMPLEMENTATION
+// To build this component run the following command:
+// "go build -buildmode=plugin -o sample_custom_component1.so"
 // This is a sample external component implementation that can be used as a reference to implement external components.
 // The external component should implement the external.Component interface.
 const (

sample_custom_component2/main.go

@@ -14,6 +14,8 @@ import (
 )
 
 // SAMPLE EXTERNAL COMPONENT IMPLEMENTATION
+// To build this component run the following command:
+// "go build -buildmode=plugin -o sample_custom_component2.so"
 // This is a sample external component implementation that can be used as a reference to implement external components.
 // The external component should implement the external.Component interface.
 const (