13 files changed, 177 insertions, 117 deletions

diff --git a/indra/llmessage/CMakeLists.txt b/indra/llmessage/CMakeLists.txt
index f0a1dfe940..2f99ca069e 100644
--- a/indra/llmessage/CMakeLists.txt
+++ b/indra/llmessage/CMakeLists.txt
@@ -9,7 +9,7 @@ include(LLCommon)
 include(LLCoreHttp)
 include(LLMath)
 include(LLMessage)
-include(LLFileSystem)
+include(LLVFS)
 include(LLAddBuildTest)
 include(Python)
 include(Tut)
@@ -23,7 +23,7 @@ include_directories(
     ${LLCOREHTTP_INCLUDE_DIRS}
     ${LLMATH_INCLUDE_DIRS}
     ${LLMESSAGE_INCLUDE_DIRS}
-    ${LLFILESYSTEM_INCLUDE_DIRS}
+    ${LLVFS_INCLUDE_DIRS}
     ${JSONCPP_INCLUDE_DIR}
     )
 
@@ -209,7 +209,7 @@ target_link_libraries(
   llmessage
   ${CURL_LIBRARIES}
   ${LLCOMMON_LIBRARIES}
-  ${LLFILESYSTEM_LIBRARIES}
+  ${LLVFS_LIBRARIES}
   ${LLMATH_LIBRARIES}
   ${JSONCPP_LIBRARIES}
   ${OPENSSL_LIBRARIES}
@@ -227,7 +227,7 @@ target_link_libraries(
   llmessage
   ${CURL_LIBRARIES}
   ${LLCOMMON_LIBRARIES}
-  ${LLFILESYSTEM_LIBRARIES}
+  ${LLVFS_LIBRARIES}
   ${LLMATH_LIBRARIES}
   ${JSONCPP_LIBRARIES}
   ${OPENSSL_LIBRARIES}
@@ -257,7 +257,7 @@ if (LL_TESTS)
 if (LINUX)
   set(test_libs
     ${WINDOWS_LIBRARIES}
-    ${LLFILESYSTEM_LIBRARIES}
+    ${LLVFS_LIBRARIES}
     ${LLMATH_LIBRARIES}
     ${CURL_LIBRARIES}
     ${NGHTTP2_LIBRARIES}
@@ -273,7 +273,7 @@ if (LINUX)
 else (LINUX)
   set(test_libs
     ${WINDOWS_LIBRARIES}
-    ${LLFILESYSTEM_LIBRARIES}
+    ${LLVFS_LIBRARIES}
     ${LLMATH_LIBRARIES}
     ${CURL_LIBRARIES}
     ${NGHTTP2_LIBRARIES}
diff --git a/indra/llmessage/llassetstorage.cpp b/indra/llmessage/llassetstorage.cpp
index f38a5e663e..d7801b6ddc 100644
--- a/indra/llmessage/llassetstorage.cpp
+++ b/indra/llmessage/llassetstorage.cpp
@@ -42,7 +42,8 @@
 // this library includes
 #include "message.h"
 #include "llxfermanager.h"
-#include "llfilesystem.h"
+#include "llvfile.h"
+#include "llvfs.h"
 #include "lldbstrings.h"
 
 #include "lltransfersourceasset.h"
@@ -201,7 +202,7 @@ LLBaseDownloadRequest::LLBaseDownloadRequest(const LLUUID &uuid, const LLAssetTy
       mIsTemp(FALSE),
       mIsPriority(FALSE),
       mDataSentInFirstPacket(FALSE),
-      mDataIsInCache(FALSE)
+      mDataIsInVFS(FALSE)
 {
     // Need to guarantee that this time is up to date, we may be creating a circuit even though we haven't been
     //  running a message system loop.
@@ -265,8 +266,7 @@ LLSD LLAssetRequest::getFullDetails() const
     sd["is_local"] = mIsLocal;
     sd["is_priority"] = mIsPriority;
     sd["data_send_in_first_packet"] = mDataSentInFirstPacket;
-    // Note: cannot change this (easily) since it is consumed by server
-    sd["data_is_in_vfs"] = mDataIsInCache;
+    sd["data_is_in_vfs"] = mDataIsInVFS;
 
     return sd;
 }
@@ -330,23 +330,28 @@ LLBaseDownloadRequest* LLEstateAssetRequest::getCopy()
 // TODO: rework tempfile handling?
 
 
-LLAssetStorage::LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer, const LLHost &upstream_host)
+LLAssetStorage::LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer, LLVFS *vfs, LLVFS *static_vfs, const LLHost &upstream_host)
 {
-    _init(msg, xfer, upstream_host);
+    _init(msg, xfer, vfs, static_vfs, upstream_host);
 }
 
-LLAssetStorage::LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer)
+LLAssetStorage::LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer,
+                               LLVFS *vfs, LLVFS *static_vfs)
 {
-    _init(msg, xfer, LLHost());
+    _init(msg, xfer, vfs, static_vfs, LLHost());
 }
 
 void LLAssetStorage::_init(LLMessageSystem *msg,
                            LLXferManager *xfer,
+                           LLVFS *vfs,
+                           LLVFS *static_vfs,
                            const LLHost &upstream_host)
 {
     mShutDown = FALSE;
     mMessageSys = msg;
     mXferManager = xfer;
+    mVFS = vfs;
+    mStaticVFS = static_vfs;
 
     setUpstream(upstream_host);
     msg->setHandlerFuncFast(_PREHASH_AssetUploadComplete, processUploadComplete, (void **)this);
@@ -425,7 +430,7 @@ void LLAssetStorage::_cleanupRequests(BOOL all, S32 error)
         }
         if (tmp->mDownCallback)
         {
-            tmp->mDownCallback(tmp->getUUID(), tmp->getType(), tmp->mUserData, error, LLExtStat::NONE);
+            tmp->mDownCallback(mVFS, tmp->getUUID(), tmp->getType(), tmp->mUserData, error, LLExtStat::NONE);
         }
         if (tmp->mInfoCallback)
         {
@@ -438,10 +443,10 @@ void LLAssetStorage::_cleanupRequests(BOOL all, S32 error)
 
 BOOL LLAssetStorage::hasLocalAsset(const LLUUID &uuid, const LLAssetType::EType type)
 {
-    return LLFileSystem::getExists(uuid, type);
+    return mStaticVFS->getExists(uuid, type) || mVFS->getExists(uuid, type);
 }
 
-bool LLAssetStorage::findInCacheAndInvokeCallback(const LLUUID& uuid, LLAssetType::EType type,
+bool LLAssetStorage::findInStaticVFSAndInvokeCallback(const LLUUID& uuid, LLAssetType::EType type,
                                                       LLGetAssetCallback callback, void *user_data)
 {
     if (user_data)
@@ -450,17 +455,17 @@ bool LLAssetStorage::findInCacheAndInvokeCallback(const LLUUID& uuid, LLAssetTyp
         llassert(callback != NULL);
     }
 
-    BOOL exists = LLFileSystem::getExists(uuid, type);
+    BOOL exists = mStaticVFS->getExists(uuid, type);
     if (exists)
     {
-        LLFileSystem file(uuid, type);
+        LLVFile file(mStaticVFS, uuid, type);
         U32 size = file.getSize();
         if (size > 0)
         {
             // we've already got the file
             if (callback)
             {
-                callback(uuid, type, user_data, LL_ERR_NOERR, LLExtStat::CACHE_CACHED);
+                callback(mStaticVFS, uuid, type, user_data, LL_ERR_NOERR, LLExtStat::VFS_CACHED);
             }
             return true;
         }
@@ -501,7 +506,7 @@ void LLAssetStorage::getAssetData(const LLUUID uuid,
         if (callback)
         {
             add(sFailedDownloadCount, 1);
-            callback(uuid, type, user_data, LL_ERR_ASSET_REQUEST_FAILED, LLExtStat::NONE);
+            callback(mVFS, uuid, type, user_data, LL_ERR_ASSET_REQUEST_FAILED, LLExtStat::NONE);
         }
         return;
     }
@@ -512,19 +517,20 @@ void LLAssetStorage::getAssetData(const LLUUID uuid,
         if (callback)
         {
             add(sFailedDownloadCount, 1);
-            callback(uuid, type, user_data, LL_ERR_ASSET_REQUEST_NOT_IN_DATABASE, LLExtStat::NULL_UUID);
+            callback(mVFS, uuid, type, user_data, LL_ERR_ASSET_REQUEST_NOT_IN_DATABASE, LLExtStat::NULL_UUID);
         }
         return;
     }
 
-    if (findInCacheAndInvokeCallback(uuid,type,callback,user_data))
+    // Try static VFS first.
+    if (findInStaticVFSAndInvokeCallback(uuid,type,callback,user_data))
     {
-        LL_DEBUGS("AssetStorage") << "ASSET_TRACE asset " << uuid << " found in cache" << LL_ENDL;
+        LL_DEBUGS("AssetStorage") << "ASSET_TRACE asset " << uuid << " found in static VFS" << LL_ENDL;
         return;
     }
 
-    BOOL exists = LLFileSystem::getExists(uuid, type);
-    LLFileSystem file(uuid, type);
+    BOOL exists = mVFS->getExists(uuid, type);
+    LLVFile file(mVFS, uuid, type);
     U32 size = exists ? file.getSize() : 0;
 
     if (size > 0)
@@ -534,10 +540,10 @@ void LLAssetStorage::getAssetData(const LLUUID uuid,
         // unless there's a weird error
         if (callback)
         {
-            callback(uuid, type, user_data, LL_ERR_NOERR, LLExtStat::CACHE_CACHED);
+            callback(mVFS, uuid, type, user_data, LL_ERR_NOERR, LLExtStat::VFS_CACHED);
         }
 
-        LL_DEBUGS("AssetStorage") << "ASSET_TRACE asset " << uuid << " found in cache" << LL_ENDL;
+        LL_DEBUGS("AssetStorage") << "ASSET_TRACE asset " << uuid << " found in VFS" << LL_ENDL;
     }
     else
     {
@@ -610,7 +616,7 @@ void LLAssetStorage::removeAndCallbackPendingDownloads(const LLUUID& file_id, LL
             {
                 add(sFailedDownloadCount, 1);
             }
-            tmp->mDownCallback(callback_id, callback_type, tmp->mUserData, result_code, ext_status);
+            tmp->mDownCallback(gAssetStorage->mVFS, callback_id, callback_type, tmp->mUserData, result_code, ext_status);
         }
         delete tmp;
     }
@@ -664,7 +670,7 @@ void LLAssetStorage::downloadCompleteCallback(
     if (LL_ERR_NOERR == result)
     {
         // we might have gotten a zero-size file
-        LLFileSystem vfile(callback_id, callback_type);
+        LLVFile vfile(gAssetStorage->mVFS, callback_id, callback_type);
         if (vfile.getSize() <= 0)
         {
             LL_WARNS("AssetStorage") << "downloadCompleteCallback has non-existent or zero-size asset " << callback_id << LL_ENDL;
@@ -713,19 +719,19 @@ void LLAssetStorage::getEstateAsset(
         if (callback)
         {
             add(sFailedDownloadCount, 1);
-            callback(asset_id, atype, user_data, LL_ERR_ASSET_REQUEST_NOT_IN_DATABASE, LLExtStat::NULL_UUID);
+            callback(mVFS, asset_id, atype, user_data, LL_ERR_ASSET_REQUEST_NOT_IN_DATABASE, LLExtStat::NULL_UUID);
         }
         return;
     }
 
-    // Try static first.
-    if (findInCacheAndInvokeCallback(asset_id,atype,callback,user_data))
+    // Try static VFS first.
+    if (findInStaticVFSAndInvokeCallback(asset_id,atype,callback,user_data))
     {
         return;
     }
     
-    BOOL exists = LLFileSystem::getExists(asset_id, atype);
-    LLFileSystem file(asset_id, atype);
+    BOOL exists = mVFS->getExists(asset_id, atype);
+    LLVFile file(mVFS, asset_id, atype);
     U32 size = exists ? file.getSize() : 0;
 
     if (size > 0)
@@ -735,7 +741,7 @@ void LLAssetStorage::getEstateAsset(
         // unless there's a weird error
         if (callback)
         {
-            callback(asset_id, atype, user_data, LL_ERR_NOERR, LLExtStat::CACHE_CACHED);
+            callback(mVFS, asset_id, atype, user_data, LL_ERR_NOERR, LLExtStat::VFS_CACHED);
         }
     }
     else
@@ -786,7 +792,7 @@ void LLAssetStorage::getEstateAsset(
             if (callback)
             {
                 add(sFailedDownloadCount, 1);
-                callback(asset_id, atype, user_data, LL_ERR_CIRCUIT_GONE, LLExtStat::NO_UPSTREAM);
+                callback(mVFS, asset_id, atype, user_data, LL_ERR_CIRCUIT_GONE, LLExtStat::NO_UPSTREAM);
             }
         }
     }
@@ -818,7 +824,7 @@ void LLAssetStorage::downloadEstateAssetCompleteCallback(
     if (LL_ERR_NOERR == result)
     {
         // we might have gotten a zero-size file
-        LLFileSystem vfile(req->getUUID(), req->getAType());
+        LLVFile vfile(gAssetStorage->mVFS, req->getUUID(), req->getAType());
         if (vfile.getSize() <= 0)
         {
             LL_WARNS("AssetStorage") << "downloadCompleteCallback has non-existent or zero-size asset!" << LL_ENDL;
@@ -832,7 +838,7 @@ void LLAssetStorage::downloadEstateAssetCompleteCallback(
     {
         add(sFailedDownloadCount, 1);
     }
-    req->mDownCallback(req->getUUID(), req->getAType(), req->mUserData, result, ext_status);
+    req->mDownCallback(gAssetStorage->mVFS, req->getUUID(), req->getAType(), req->mUserData, result, ext_status);
 }
 
 void LLAssetStorage::getInvItemAsset(
@@ -855,13 +861,14 @@ void LLAssetStorage::getInvItemAsset(
 
     if(asset_id.notNull())
     {
-        if (findInCacheAndInvokeCallback( asset_id, atype, callback, user_data))
+        // Try static VFS first.
+        if (findInStaticVFSAndInvokeCallback( asset_id, atype, callback, user_data))
         {
             return;
         }
 
-        exists = LLFileSystem::getExists(asset_id, atype);
-        LLFileSystem file(asset_id, atype);
+        exists = mVFS->getExists(asset_id, atype);
+        LLVFile file(mVFS, asset_id, atype);
         size = exists ? file.getSize() : 0;
         if(exists && size < 1)
         {
@@ -878,7 +885,7 @@ void LLAssetStorage::getInvItemAsset(
         // unless there's a weird error
         if (callback)
         {
-            callback(asset_id, atype, user_data, LL_ERR_NOERR, LLExtStat::CACHE_CACHED);
+            callback(mVFS, asset_id, atype, user_data, LL_ERR_NOERR, LLExtStat::VFS_CACHED);
         }
     }
     else
@@ -929,7 +936,7 @@ void LLAssetStorage::getInvItemAsset(
             if (callback)
             {
                 add(sFailedDownloadCount, 1);
-                callback(asset_id, atype, user_data, LL_ERR_CIRCUIT_GONE, LLExtStat::NO_UPSTREAM);
+                callback(mVFS, asset_id, atype, user_data, LL_ERR_CIRCUIT_GONE, LLExtStat::NO_UPSTREAM);
             }
         }
     }
@@ -961,7 +968,7 @@ void LLAssetStorage::downloadInvItemCompleteCallback(
     if (LL_ERR_NOERR == result)
     {
         // we might have gotten a zero-size file
-        LLFileSystem vfile(req->getUUID(), req->getType());
+        LLVFile vfile(gAssetStorage->mVFS, req->getUUID(), req->getType());
         if (vfile.getSize() <= 0)
         {
             LL_WARNS("AssetStorage") << "downloadCompleteCallback has non-existent or zero-size asset!" << LL_ENDL;
@@ -975,7 +982,7 @@ void LLAssetStorage::downloadInvItemCompleteCallback(
     {
         add(sFailedDownloadCount, 1);
     }
-    req->mDownCallback(req->getUUID(), req->getType(), req->mUserData, result, ext_status);
+    req->mDownCallback(gAssetStorage->mVFS, req->getUUID(), req->getType(), req->mUserData, result, ext_status);
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -1286,7 +1293,7 @@ bool LLAssetStorage::deletePendingRequestImpl(LLAssetStorage::request_list_t* re
         if (req->mDownCallback)
         {
             add(sFailedDownloadCount, 1);
-            req->mDownCallback(req->getUUID(), req->getType(), req->mUserData, error, LLExtStat::REQUEST_DROPPED);
+            req->mDownCallback(mVFS, req->getUUID(), req->getType(), req->mUserData, error, LLExtStat::REQUEST_DROPPED);
         }
         if (req->mInfoCallback)
         {
@@ -1356,7 +1363,8 @@ void LLAssetStorage::getAssetData(const LLUUID uuid,
     {
         LLAssetRequest* tmp = *iter++;
 
-        auto cbptr = tmp->mDownCallback.target<void(*)(const LLUUID &, LLAssetType::EType, void *, S32, LLExtStat)>();
+        //void(*const* cbptr)(LLVFS *, const LLUUID &, LLAssetType::EType, void *, S32, LLExtStat) 
+        auto cbptr = tmp->mDownCallback.target<void(*)(LLVFS *, const LLUUID &, LLAssetType::EType, void *, S32, LLExtStat)>();
 
         if (type == tmp->getType() && 
             uuid == tmp->getUUID() &&
@@ -1381,7 +1389,8 @@ void LLAssetStorage::getAssetData(const LLUUID uuid,
 }
 
 // static
-void LLAssetStorage::legacyGetDataCallback(const LLUUID &uuid, 
+void LLAssetStorage::legacyGetDataCallback(LLVFS *vfs,
+                                           const LLUUID &uuid, 
                                            LLAssetType::EType type,
                                            void *user_data, 
                                            S32 status, 
@@ -1396,7 +1405,7 @@ void LLAssetStorage::legacyGetDataCallback(const LLUUID &uuid,
     if ( !status
          && !toxic )
     {
-        LLFileSystem file(uuid, type);
+        LLVFile file(vfs, uuid, type);
 
         std::string uuid_str;
 
diff --git a/indra/llmessage/llassetstorage.h b/indra/llmessage/llassetstorage.h
index e0f22f1160..c799d8eefc 100644
--- a/indra/llmessage/llassetstorage.h
+++ b/indra/llmessage/llassetstorage.h
@@ -44,6 +44,7 @@
 class LLMessageSystem;
 class LLXferManager;
 class LLAssetStorage;
+class LLVFS;
 class LLSD;
 
 // anything that takes longer than this to download will abort.
@@ -59,11 +60,11 @@ const int LL_ERR_ASSET_REQUEST_NOT_IN_DATABASE = -4;
 const int LL_ERR_INSUFFICIENT_PERMISSIONS = -5;
 const int LL_ERR_PRICE_MISMATCH = -23018;
 
-// *TODO: these typedefs are passed into the cache via a legacy C function pointer
+// *TODO: these typedefs are passed into the VFS via a legacy C function pointer
 // future project would be to convert these to C++ callables (std::function<>) so that 
 // we can use bind and remove the userData parameter.
 // 
-typedef std::function<void(const LLUUID &asset_id, LLAssetType::EType asset_type, void *user_data, S32 status, LLExtStat ext_status)> LLGetAssetCallback;
+typedef std::function<void(LLVFS *vfs, const LLUUID &asset_id, LLAssetType::EType asset_type, void *user_data, S32 status, LLExtStat ext_status)> LLGetAssetCallback;
 typedef std::function<void(const LLUUID &asset_id, void *user_data, S32 status, LLExtStat ext_status)> LLStoreAssetCallback;
 
 
@@ -119,6 +120,7 @@ protected:
 
 public:
     LLGetAssetCallback mDownCallback;
+//    void(*mDownCallback)(LLVFS*, const LLUUID&, LLAssetType::EType, void *, S32, LLExtStat);
 
     void	*mUserData;
     LLHost  mHost;
@@ -126,7 +128,7 @@ public:
     F64Seconds		mTime;				// Message system time
     BOOL    mIsPriority;
     BOOL	mDataSentInFirstPacket;
-    BOOL	mDataIsInCache;
+    BOOL	mDataIsInVFS;
 };
 
 class LLAssetRequest : public LLBaseDownloadRequest
@@ -196,6 +198,9 @@ typedef std::map<LLUUID,U64,lluuid_less> toxic_asset_map_t;
 class LLAssetStorage
 {
 public:
+	// VFS member is public because static child methods need it :(
+	LLVFS *mVFS;
+	LLVFS *mStaticVFS;
     typedef ::LLStoreAssetCallback LLStoreAssetCallback;
     typedef ::LLGetAssetCallback LLGetAssetCallback;
 
@@ -225,9 +230,11 @@ protected:
 	toxic_asset_map_t	mToxicAssetMap;		// Objects in this list are known to cause problems and are not loaded
 
 public:
-	LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer, const LLHost &upstream_host);
+	LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer,
+				   LLVFS *vfs, LLVFS *static_vfs, const LLHost &upstream_host);
 
-	LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer);
+	LLAssetStorage(LLMessageSystem *msg, LLXferManager *xfer,
+				   LLVFS *vfs, LLVFS *static_vfs);
 	virtual ~LLAssetStorage();
 
 	void setUpstream(const LLHost &upstream_host);
@@ -277,7 +284,7 @@ public:
 	void		markAssetToxic( const LLUUID& uuid );
 
 protected:
-	bool findInCacheAndInvokeCallback(const LLUUID& uuid, LLAssetType::EType type,
+	bool findInStaticVFSAndInvokeCallback(const LLUUID& uuid, LLAssetType::EType type,
 										  LLGetAssetCallback callback, void *user_data);
 
 	LLSD getPendingDetailsImpl(const request_list_t* requests,
@@ -368,7 +375,7 @@ public:
 		bool user_waiting = false,
 		F64Seconds timeout  = LL_ASSET_STORAGE_TIMEOUT) = 0;
 
-	static void legacyGetDataCallback(const LLUUID &uuid, LLAssetType::EType, void *user_data, S32 status, LLExtStat ext_status);
+	static void legacyGetDataCallback(LLVFS *vfs, const LLUUID &uuid, LLAssetType::EType, void *user_data, S32 status, LLExtStat ext_status);
 	static void legacyStoreDataCallback(const LLUUID &uuid, void *user_data, S32 status, LLExtStat ext_status);
 
 	// add extra methods to handle metadata
@@ -378,12 +385,15 @@ protected:
 	void _callUploadCallbacks(const LLUUID &uuid, const LLAssetType::EType asset_type, BOOL success, LLExtStat ext_status);
 
 	virtual void _queueDataRequest(const LLUUID& uuid, LLAssetType::EType type, LLGetAssetCallback callback,
+//								   void (*callback)(LLVFS *vfs, const LLUUID&, LLAssetType::EType, void *, S32, LLExtStat),
 								   void *user_data, BOOL duplicate,
 								   BOOL is_priority) = 0;
 
 private:
 	void _init(LLMessageSystem *msg,
 			   LLXferManager *xfer,
+			   LLVFS *vfs,
+			   LLVFS *static_vfs,
 			   const LLHost &upstream_host);
 
 protected:
@@ -398,7 +408,7 @@ protected:
 		MR_FILE_NONEXIST	= 3,	// Old format store call - source file does not exist
 		MR_NO_FILENAME		= 4,	// Old format store call - source filename is NULL/0-length
 		MR_NO_UPSTREAM		= 5,	// Upstream provider is missing
-		MR_CACHE_CORRUPTION	= 6		// cache is corrupt - too-large or mismatched stated/returned sizes
+		MR_VFS_CORRUPTION	= 6		// VFS is corrupt - too-large or mismatched stated/returned sizes
 	};
 
 	static class LLMetrics *metric_recipient;
diff --git a/indra/llmessage/llcorehttputil.cpp b/indra/llmessage/llcorehttputil.cpp
index 7031f1aa8c..0eae6d9826 100644
--- a/indra/llmessage/llcorehttputil.cpp
+++ b/indra/llmessage/llcorehttputil.cpp
@@ -37,7 +37,7 @@
 #include "llsdserialize.h"
 #include "reader.h" // JSON
 #include "writer.h" // JSON
-#include "llfilesystem.h"
+#include "llvfile.h"
 
 #include "message.h" // for getting the port
 
@@ -784,7 +784,7 @@ LLSD HttpCoroutineAdapter::postFileAndSuspend(LLCore::HttpRequest::ptr_t request
     // scoping for our streams so that they go away when we no longer need them.
     {
         LLCore::BufferArrayStream outs(fileData.get());
-        LLFileSystem vfile(assetId, assetType, LLFileSystem::READ);
+        LLVFile vfile(gVFS, assetId, assetType, LLVFile::READ);
 
         S32 fileSize = vfile.getSize();
         U8* fileBuffer;
diff --git a/indra/llmessage/llextendedstatus.h b/indra/llmessage/llextendedstatus.h
index 2a53dced80..9923d73c1a 100644
--- a/indra/llmessage/llextendedstatus.h
+++ b/indra/llmessage/llextendedstatus.h
@@ -1,7 +1,7 @@
 /** 
  * @file llextendedstatus.h
  * @date   August 2007
- * @brief extended status codes for curl/resident asset storage and delivery
+ * @brief extended status codes for curl/vfs/resident asset storage and delivery
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -32,9 +32,9 @@ enum class LLExtStat: uint32_t
 {
 	// Status provider groups - Top bits indicate which status type it is
 	// Zero is common status code (next section)
-	CURL_RESULT	 = 1UL<<30, // serviced by curl - use 1L if we really implement the below
-	RES_RESULT	 = 2UL<<30, // serviced by resident copy
-	CACHE_RESULT = 3UL<<30, // serviced by cache
+	CURL_RESULT	= 1UL<<30, // serviced by curl - use 1L if we really implement the below
+	RES_RESULT	= 2UL<<30, // serviced by resident copy
+	VFS_RESULT	= 3UL<<30, // serviced by vfs
 
 
 	// Common Status Codes
@@ -54,9 +54,9 @@ enum class LLExtStat: uint32_t
 	// Memory-Resident status codes:
 	// None at present
 
-	// CACHE status codes:
-	CACHE_CACHED	= CACHE_RESULT | 0x0001,
-	CACHE_CORRUPT	= CACHE_RESULT | 0x0002,
+	// VFS status codes:
+	VFS_CACHED	= VFS_RESULT | 0x0001,
+	VFS_CORRUPT	= VFS_RESULT | 0x0002,
 };
 
 
diff --git a/indra/llmessage/lltransfersourceasset.cpp b/indra/llmessage/lltransfersourceasset.cpp
index 027283232d..80ed3340c6 100644
--- a/indra/llmessage/lltransfersourceasset.cpp
+++ b/indra/llmessage/lltransfersourceasset.cpp
@@ -32,7 +32,7 @@
 #include "message.h"
 #include "lldatapacker.h"
 #include "lldir.h"
-#include "llfilesystem.h"
+#include "llvfile.h"
 
 LLTransferSourceAsset::LLTransferSourceAsset(const LLUUID &request_id, const F32 priority) :
 	LLTransferSource(LLTST_ASSET, request_id, priority),
@@ -99,7 +99,7 @@ LLTSCode LLTransferSourceAsset::dataCallback(const S32 packet_id,
 		return LLTS_SKIP;
 	}
 
-	LLFileSystem vf(mParams.getAssetID(), mParams.getAssetType(), LLFileSystem::READ);
+	LLVFile vf(gAssetStorage->mVFS, mParams.getAssetID(), mParams.getAssetType(), LLVFile::READ);
 
 	if (!vf.getSize())
 	{
@@ -171,7 +171,7 @@ BOOL LLTransferSourceAsset::unpackParams(LLDataPacker &dp)
 }
 
 
-void LLTransferSourceAsset::responderCallback(const LLUUID& uuid, LLAssetType::EType type,
+void LLTransferSourceAsset::responderCallback(LLVFS *vfs, const LLUUID& uuid, LLAssetType::EType type,
 											  void *user_data, S32 result, LLExtStat ext_status )
 {
 	LLUUID *tidp = ((LLUUID*) user_data);
@@ -198,7 +198,7 @@ void LLTransferSourceAsset::responderCallback(const LLUUID& uuid, LLAssetType::E
 	if (LL_ERR_NOERR == result)
 	{
 		// Everything's OK.
-		LLFileSystem vf(uuid, type, LLFileSystem::READ);
+		LLVFile vf(gAssetStorage->mVFS, uuid, type, LLVFile::READ);
 		tsap->mSize = vf.getSize();
 		status = LLTS_OK;
 	}
diff --git a/indra/llmessage/lltransfersourceasset.h b/indra/llmessage/lltransfersourceasset.h
index 585e683cb3..3abda83cf8 100644
--- a/indra/llmessage/lltransfersourceasset.h
+++ b/indra/llmessage/lltransfersourceasset.h
@@ -30,7 +30,7 @@
 #include "lltransfermanager.h"
 #include "llassetstorage.h"
 
-class LLFileSystem;
+class LLVFile;
 
 class LLTransferSourceParamsAsset : public LLTransferSourceParams
 {
@@ -56,7 +56,7 @@ public:
 	LLTransferSourceAsset(const LLUUID &request_id, const F32 priority);
 	virtual ~LLTransferSourceAsset();
 
-	static void responderCallback(const LLUUID& uuid, LLAssetType::EType type,
+	static void responderCallback(LLVFS *vfs, const LLUUID& uuid, LLAssetType::EType type,
 								  void *user_data, S32 result, LLExtStat ext_status );
 protected:
 	/*virtual*/ void initTransfer();
diff --git a/indra/llmessage/lltransfertargetvfile.cpp b/indra/llmessage/lltransfertargetvfile.cpp
index f6faadf87f..b27f0881e0 100644
--- a/indra/llmessage/lltransfertargetvfile.cpp
+++ b/indra/llmessage/lltransfertargetvfile.cpp
@@ -30,7 +30,7 @@
 
 #include "lldatapacker.h"
 #include "llerror.h"
-#include "llfilesystem.h"
+#include "llvfile.h"
 
 //static
 void LLTransferTargetVFile::updateQueue(bool shutdown)
@@ -138,9 +138,10 @@ LLTSCode LLTransferTargetVFile::dataCallback(const S32 packet_id, U8 *in_datap,
 	//LL_INFOS() << "LLTransferTargetFile::dataCallback" << LL_ENDL;
 	//LL_INFOS() << "Packet: " << packet_id << LL_ENDL;
 
-	LLFileSystem vf(mTempID, mParams.getAssetType(), LLFileSystem::APPEND);
+	LLVFile vf(gAssetStorage->mVFS, mTempID, mParams.getAssetType(), LLVFile::APPEND);
 	if (mNeedsCreate)
 	{
+		vf.setMaxSize(mSize);
 		mNeedsCreate = FALSE;
 	}
 
@@ -175,7 +176,7 @@ void LLTransferTargetVFile::completionCallback(const LLTSCode status)
 	  case LLTS_DONE:
 		if (!mNeedsCreate)
 		{
-			LLFileSystem file(mTempID, mParams.getAssetType(), LLFileSystem::WRITE);
+			LLVFile file(gAssetStorage->mVFS, mTempID, mParams.getAssetType(), LLVFile::WRITE);
 			if (!file.rename(mParams.getAssetID(), mParams.getAssetType()))
 			{
 				LL_ERRS() << "LLTransferTargetVFile: rename failed" << LL_ENDL;
@@ -194,7 +195,7 @@ void LLTransferTargetVFile::completionCallback(const LLTSCode status)
 	  {
 		  // We're aborting this transfer, we don't want to keep this file.
 		  LL_WARNS() << "Aborting vfile transfer for " << mParams.getAssetID() << LL_ENDL;
-		  LLFileSystem vf(mTempID, mParams.getAssetType(), LLFileSystem::APPEND);
+		  LLVFile vf(gAssetStorage->mVFS, mTempID, mParams.getAssetType(), LLVFile::APPEND);
 		  vf.remove();
 	  }
 	  break;
diff --git a/indra/llmessage/lltransfertargetvfile.h b/indra/llmessage/lltransfertargetvfile.h
index 39a9125f1b..c819c1e2f2 100644
--- a/indra/llmessage/lltransfertargetvfile.h
+++ b/indra/llmessage/lltransfertargetvfile.h
@@ -29,9 +29,9 @@
 
 #include "lltransfermanager.h"
 #include "llassetstorage.h"
-#include "llfilesystem.h"
+#include "llvfile.h"
 
-class LLFileSystem;
+class LLVFile;
 
 // Lame, an S32 for now until I figure out the deal with how we want to do
 // error codes.
diff --git a/indra/llmessage/llxfer_vfile.cpp b/indra/llmessage/llxfer_vfile.cpp
index 12419b342d..ddc24342f6 100644
--- a/indra/llmessage/llxfer_vfile.cpp
+++ b/indra/llmessage/llxfer_vfile.cpp
@@ -30,7 +30,8 @@
 #include "lluuid.h"
 #include "llerror.h"
 #include "llmath.h"
-#include "llfilesystem.h"
+#include "llvfile.h"
+#include "llvfs.h"
 #include "lldir.h"
 
 // size of chunks read from/written to disk
@@ -41,13 +42,13 @@ const U32 LL_MAX_XFER_FILE_BUFFER = 65536;
 LLXfer_VFile::LLXfer_VFile ()
 : LLXfer(-1)
 {
-	init(LLUUID::null, LLAssetType::AT_NONE);
+	init(NULL, LLUUID::null, LLAssetType::AT_NONE);
 }
 
-LLXfer_VFile::LLXfer_VFile (const LLUUID &local_id, LLAssetType::EType type)
+LLXfer_VFile::LLXfer_VFile (LLVFS *vfs, const LLUUID &local_id, LLAssetType::EType type)
 : LLXfer(-1)
 {
-	init(local_id, type);
+	init(vfs, local_id, type);
 }
 
 ///////////////////////////////////////////////////////////
@@ -59,8 +60,10 @@ LLXfer_VFile::~LLXfer_VFile ()
 
 ///////////////////////////////////////////////////////////
 
-void LLXfer_VFile::init (const LLUUID &local_id, LLAssetType::EType type)
+void LLXfer_VFile::init (LLVFS *vfs, const LLUUID &local_id, LLAssetType::EType type)
 {
+
+	mVFS = vfs;
 	mLocalID = local_id;
 	mType = type;
 
@@ -79,14 +82,14 @@ void LLXfer_VFile::cleanup ()
 	if (mTempID.notNull() &&
 		mDeleteTempFile)
 	{
-		if (LLFileSystem::getExists(mTempID, mType))
+		if (mVFS->getExists(mTempID, mType))
 		{
-			LLFileSystem file(mTempID, mType, LLFileSystem::WRITE);
+			LLVFile file(mVFS, mTempID, mType, LLVFile::WRITE);
 			file.remove();
 		}
 		else
 		{
-			LL_WARNS("Xfer") << "LLXfer_VFile::cleanup() can't open to delete cache file " << mTempID << "." << LLAssetType::lookup(mType)		
+			LL_WARNS("Xfer") << "LLXfer_VFile::cleanup() can't open to delete VFS file " << mTempID << "." << LLAssetType::lookup(mType)		
 				<< ", mRemoteID is " << mRemoteID << LL_ENDL;
 		}
 	}
@@ -100,6 +103,7 @@ void LLXfer_VFile::cleanup ()
 ///////////////////////////////////////////////////////////
 
 S32 LLXfer_VFile::initializeRequest(U64 xfer_id,
+									LLVFS* vfs,
 									const LLUUID& local_id,
 									const LLUUID& remote_id,
 									LLAssetType::EType type,
@@ -111,6 +115,7 @@ S32 LLXfer_VFile::initializeRequest(U64 xfer_id,
 	
 	mRemoteHost = remote_host;
 
+	mVFS = vfs;
 	mLocalID = local_id;
 	mRemoteID = remote_id;
 	mType = type;
@@ -187,13 +192,13 @@ S32 LLXfer_VFile::startSend (U64 xfer_id, const LLHost &remote_host)
 	
 	delete mVFile;
 	mVFile = NULL;
-	if(LLFileSystem::getExists(mLocalID, mType))
+	if(mVFS->getExists(mLocalID, mType))
 	{
-		mVFile = new LLFileSystem(mLocalID, mType, LLFileSystem::READ);
+		mVFile = new LLVFile(mVFS, mLocalID, mType, LLVFile::READ);
 
 		if (mVFile->getSize() <= 0)
 		{
-			LL_WARNS("Xfer") << "LLXfer_VFile::startSend() cache file " << mLocalID << "." << LLAssetType::lookup(mType)		
+			LL_WARNS("Xfer") << "LLXfer_VFile::startSend() VFS file " << mLocalID << "." << LLAssetType::lookup(mType)		
 				<< " has unexpected file size of " << mVFile->getSize() << LL_ENDL;
 			delete mVFile;
 			mVFile = NULL;
@@ -209,7 +214,7 @@ S32 LLXfer_VFile::startSend (U64 xfer_id, const LLHost &remote_host)
 	}
 	else
 	{
-		LL_WARNS("Xfer") << "LLXfer_VFile::startSend() can't read cache file " << mLocalID << "." << LLAssetType::lookup(mType) << LL_ENDL;
+		LL_WARNS("Xfer") << "LLXfer_VFile::startSend() can't read VFS file " << mLocalID << "." << LLAssetType::lookup(mType) << LL_ENDL;
 		retval = LL_ERR_FILE_NOT_FOUND;
 	}
 
@@ -235,13 +240,13 @@ S32 LLXfer_VFile::reopenFileHandle()
 
 	if (mVFile == NULL)
 	{
-		if (LLFileSystem::getExists(mLocalID, mType))
+		if (mVFS->getExists(mLocalID, mType))
 		{
-			mVFile = new LLFileSystem(mLocalID, mType, LLFileSystem::READ);
+			mVFile = new LLVFile(mVFS, mLocalID, mType, LLVFile::READ);
 		}
 		else
 		{
-			LL_WARNS("Xfer") << "LLXfer_VFile::reopenFileHandle() can't read cache file " << mLocalID << "." << LLAssetType::lookup(mType) << LL_ENDL;
+			LL_WARNS("Xfer") << "LLXfer_VFile::reopenFileHandle() can't read VFS file " << mLocalID << "." << LLAssetType::lookup(mType) << LL_ENDL;
 			retval = LL_ERR_FILE_NOT_FOUND;
 		}
 	}
@@ -260,7 +265,8 @@ void LLXfer_VFile::setXferSize (S32 xfer_size)
 	// It would be nice if LLXFers could tell which end of the pipe they were
 	if (! mVFile)
 	{
-		LLFileSystem file(mTempID, mType, LLFileSystem::APPEND);
+		LLVFile file(mVFS, mTempID, mType, LLVFile::APPEND);
+		file.setMaxSize(xfer_size);
 	}
 }
 
@@ -314,7 +320,7 @@ S32 LLXfer_VFile::flush()
 	S32 retval = 0;
 	if (mBufferLength)
 	{
-		LLFileSystem file(mTempID, mType, LLFileSystem::APPEND);
+		LLVFile file(mVFS, mTempID, mType, LLVFile::APPEND);
 
 		file.write((U8*)mBuffer, mBufferLength);
 			
@@ -334,15 +340,22 @@ S32 LLXfer_VFile::processEOF()
 
 	if (!mCallbackResult)
 	{
-		if (LLFileSystem::getExists(mTempID, mType))
+		if (mVFS->getExists(mTempID, mType))
 		{
-			LLFileSystem file(mTempID, mType, LLFileSystem::WRITE);
+			LLVFile file(mVFS, mTempID, mType, LLVFile::WRITE);
 			if (!file.rename(mLocalID, mType))
 			{
-				LL_WARNS("Xfer") << "Cache rename of temp file failed: unable to rename " << mTempID << " to " << mLocalID << LL_ENDL;
+				LL_WARNS("Xfer") << "VFS rename of temp file failed: unable to rename " << mTempID << " to " << mLocalID << LL_ENDL;
 			}
 			else
-			{									
+			{					
+				#ifdef VFS_SPAM
+				// Debugging spam
+				LL_INFOS("Xfer") << "VFS rename of temp file done: renamed " << mTempID << " to " << mLocalID 
+					<< " LLVFile size is " << file.getSize()
+					<< LL_ENDL;
+				#endif				
+				
 				// Rename worked: the original file is gone.   Clear mDeleteTempFile
 				// so we don't attempt to delete the file in cleanup()
 				mDeleteTempFile = FALSE;
@@ -350,7 +363,7 @@ S32 LLXfer_VFile::processEOF()
 		}
 		else
 		{
-			LL_WARNS("Xfer") << "LLXfer_VFile::processEOF() can't open for renaming cache file " << mTempID << "." << LLAssetType::lookup(mType) << LL_ENDL;
+			LL_WARNS("Xfer") << "LLXfer_VFile::processEOF() can't open for renaming VFS file " << mTempID << "." << LLAssetType::lookup(mType) << LL_ENDL;
 		}
 	}
 
diff --git a/indra/llmessage/llxfer_vfile.h b/indra/llmessage/llxfer_vfile.h
index d82bab5f6c..5bf9a5cfba 100644
--- a/indra/llmessage/llxfer_vfile.h
+++ b/indra/llmessage/llxfer_vfile.h
@@ -30,7 +30,8 @@
 #include "llxfer.h"
 #include "llassetstorage.h"
 
-class LLFileSystem;
+class LLVFS;
+class LLVFile;
 
 class LLXfer_VFile : public LLXfer
 {
@@ -40,7 +41,9 @@ class LLXfer_VFile : public LLXfer
 	LLUUID mTempID;
 	LLAssetType::EType mType;
 	
-	LLFileSystem *mVFile;
+	LLVFile *mVFile;
+
+	LLVFS *mVFS;
 
 	std::string mName;
 
@@ -48,13 +51,14 @@ class LLXfer_VFile : public LLXfer
 
  public:
 	LLXfer_VFile ();
-	LLXfer_VFile (const LLUUID &local_id, LLAssetType::EType type);
+	LLXfer_VFile (LLVFS *vfs, const LLUUID &local_id, LLAssetType::EType type);
 	virtual ~LLXfer_VFile();
 
-	virtual void init(const LLUUID &local_id, LLAssetType::EType type);
+	virtual void init(LLVFS *vfs, const LLUUID &local_id, LLAssetType::EType type);
 	virtual void cleanup();
 
 	virtual S32 initializeRequest(U64 xfer_id,
+			LLVFS *vfs,
 			const LLUUID &local_id,
 			const LLUUID &remote_id,
 			const LLAssetType::EType type,
diff --git a/indra/llmessage/llxfermanager.cpp b/indra/llmessage/llxfermanager.cpp
index f9b59d7e42..4cea886c8a 100644
--- a/indra/llmessage/llxfermanager.cpp
+++ b/indra/llmessage/llxfermanager.cpp
@@ -56,9 +56,9 @@ const S32 LL_DEFAULT_MAX_HARD_LIMIT_SIMULTANEOUS_XFERS = 500;
 
 ///////////////////////////////////////////////////////////
 
-LLXferManager::LLXferManager ()
+LLXferManager::LLXferManager (LLVFS *vfs)
 {
-	init();
+	init(vfs);
 }
 
 ///////////////////////////////////////////////////////////
@@ -70,7 +70,7 @@ LLXferManager::~LLXferManager ()
 
 ///////////////////////////////////////////////////////////
 
-void LLXferManager::init()
+void LLXferManager::init (LLVFS *vfs)
 {
 	cleanup();
 
@@ -78,6 +78,8 @@ void LLXferManager::init()
 	setHardLimitOutgoingXfersPerCircuit(LL_DEFAULT_MAX_HARD_LIMIT_SIMULTANEOUS_XFERS);
 	setMaxIncomingXfers(LL_DEFAULT_MAX_REQUEST_FIFO_XFERS);
 
+	mVFS = vfs;
+
 	// Turn on or off ack throttling
 	mUseAckThrottling = FALSE;
 	setAckThrottleBPS(100000);
@@ -460,7 +462,7 @@ U64 LLXferManager::requestFile(const std::string& local_filename,
 
 void LLXferManager::requestVFile(const LLUUID& local_id,
 								 const LLUUID& remote_id,
-								 LLAssetType::EType type,
+								 LLAssetType::EType type, LLVFS* vfs,
 								 const LLHost& remote_host,
 								 void (*callback)(void**,S32,LLExtStat),
 								 void** user_data,
@@ -506,6 +508,7 @@ void LLXferManager::requestVFile(const LLUUID& local_id,
 
 		addToList(xfer_p, mReceiveList, is_priority);
 		((LLXfer_VFile *)xfer_p)->initializeRequest(getNextID(),
+			vfs,
 			local_id,
 			remote_id,
 			type,
@@ -781,17 +784,33 @@ void LLXferManager::processFileRequest (LLMessageSystem *mesgsys, void ** /*user
 	LLXfer *xferp;
 
 	if (uuid != LLUUID::null)
-	{	// Request for an asset - use a cache file
+	{	// Request for an asset - use a VFS file
 		if(NULL == LLAssetType::lookup(type))
 		{
 			LL_WARNS("Xfer") << "Invalid type for xfer request: " << uuid << ":"
 					<< type_s16 << " to " << mesgsys->getSender() << LL_ENDL;
 			return;
 		}
+			
+		if (! mVFS)
+		{
+			LL_WARNS("Xfer") << "Attempt to send VFile w/o available VFS" << LL_ENDL;
+			return;
+		}
+
+		/* Present in fireengine, not used by viewer
+		if (!validateVFileForTransfer(uuid.asString()))
+		{
+			// it is up to the app sending the file to mark it for expected 
+			// transfer before the request arrives or it will be dropped
+			LL_WARNS("Xfer") << "SECURITY: Unapproved VFile '" << uuid << "'" << LL_ENDL;
+			return;
+		}
+		*/
 
 		LL_INFOS("Xfer") << "starting vfile transfer: " << uuid << "," << LLAssetType::lookup(type) << " to " << mesgsys->getSender() << LL_ENDL;
 
-		xferp = (LLXfer *)new LLXfer_VFile(uuid, type);
+		xferp = (LLXfer *)new LLXfer_VFile(mVFS, uuid, type);
 		if (xferp)
 		{
 			mSendList.push_front(xferp);
@@ -1254,9 +1273,9 @@ void LLXferManager::addToList(LLXfer* xferp, xfer_list_t & xfer_list, BOOL is_pr
 LLXferManager *gXferManager = NULL;
 
 
-void start_xfer_manager()
+void start_xfer_manager(LLVFS *vfs)
 {
-	gXferManager = new LLXferManager();
+	gXferManager = new LLXferManager(vfs);
 }
 
 void cleanup_xfer_manager()
diff --git a/indra/llmessage/llxfermanager.h b/indra/llmessage/llxfermanager.h
index f49209bed0..45ae2ffdd3 100644
--- a/indra/llmessage/llxfermanager.h
+++ b/indra/llmessage/llxfermanager.h
@@ -35,6 +35,7 @@
 
 //Forward declaration to avoid circular dependencies
 class LLXfer;
+class LLVFS;
 
 #include "llxfer.h"
 #include "message.h"
@@ -71,6 +72,9 @@ public:
 
 class LLXferManager
 {
+ private:
+	LLVFS *mVFS;
+
  protected:
 	S32    mMaxOutgoingXfersPerCircuit;
 	S32    mHardLimitOutgoingXfersPerCircuit;	// At this limit, kill off the connection
@@ -107,10 +111,10 @@ class LLXferManager
 	std::multiset<std::string> mExpectedVFileRequests;  // files that are authorized to be downloaded on top of
 
  public:
-	LLXferManager();
+	LLXferManager(LLVFS *vfs);
 	virtual ~LLXferManager();
 
-	virtual void init();
+	virtual void init(LLVFS *vfs);
 	virtual void cleanup();
 
 	void setUseAckThrottling(const BOOL use);
@@ -162,7 +166,7 @@ class LLXferManager
 // vfile requesting
 // .. to vfile
 	virtual void requestVFile(const LLUUID &local_id, const LLUUID& remote_id,
-							  LLAssetType::EType type,
+							  LLAssetType::EType type, LLVFS* vfs,
 							  const LLHost& remote_host,
 							  void (*callback)(void**,S32,LLExtStat), void** user_data,
 							  BOOL is_priority = FALSE);
@@ -209,7 +213,7 @@ class LLXferManager
 extern LLXferManager*	gXferManager;
 
 // initialization and garbage collection
-void start_xfer_manager();
+void start_xfer_manager(LLVFS *vfs);
 void cleanup_xfer_manager();
 
 // message system callbacks