[XrdCl] Create an interface for FD splicing.

src/XrdCl/XrdClFile.cc

@@ -250,6 +250,29 @@ namespace XrdCl
     return status;
   }
 
+  //------------------------------------------------------------------------
+  // Write a data chunk from a pipe at a given offset - async
+  //------------------------------------------------------------------------
+  XRootDStatus File::Write( uint64_t         offset,
+                            uint32_t         size,
+                            DataPipe        &pipe,
+                            ResponseHandler *handler,
+                            uint16_t         timeout )
+  {
+    return XRootDStatus( stError, errNotImplemented);
+  }
+
+  //------------------------------------------------------------------------
+  // Write a data chunk from a pipe at a given offset - sync
+  //------------------------------------------------------------------------
+  XRootDStatus File::Write( uint64_t    offset,
+                            uint32_t    size,
+                            DataPipe   &pipe,
+                            uint16_t    timeout )
+  {
+    return XRootDStatus( stError, errNotImplemented );
+  }
+
   //----------------------------------------------------------------------------
   // Commit all pending disk writes - async
   //----------------------------------------------------------------------------

src/XrdCl/XrdClFile.hh

@@ -37,6 +37,7 @@ namespace XrdCl
 {
   class FileStateHandler;
   class FilePlugIn;
+  class DataPipe;
 
   //----------------------------------------------------------------------------
   //! A file
@@ -232,6 +233,47 @@ namespace XrdCl
                           uint16_t    timeout = 0 )
                           XRD_WARN_UNUSED_RESULT;
 
+      //------------------------------------------------------------------------
+      //! Write a data chunk from a pipe at a given offset - async
+      //! The call interprets and returns the server response, which may be
+      //! either a success or a failure, it does not contain the number
+      //! of bytes that were actually written.
+      //!
+      //! @param offset  offset from the beginning of the file
+      //! @param size    number of bytes to be written
+      //! @param buffer  a pointer to the buffer holding the data to be written
+      //! @param handler handler to be notified when the response arrives
+      //! @param timeout timeout value, if 0 the environment default will be
+      //!                used
+      //! @return        status of the operation
+      //------------------------------------------------------------------------
+      XRootDStatus Write( uint64_t         offset,
+                          uint32_t         size,
+                          DataPipe        &pipe,
+                          ResponseHandler *handler,
+                          uint16_t         timeout = 0 )
+                          XRD_WARN_UNUSED_RESULT;
+
+      //------------------------------------------------------------------------
+      //! Write a data chunk from a pipe at a given offset - sync
+      //! The call interprets and returns the server response, which may be
+      //! either a success or a failure, it does not contain the number
+      //! of bytes that were actually written.
+      //!
+      //! @param offset  offset from the beginning of the file
+      //! @param size    number of bytes to be written
+      //! @param buffer  a pointer to the buffer holding the data to be
+      //!                written
+      //! @param timeout timeout value, if 0 the environment default will
+      //!                 be used
+      //! @return         status of the operation
+      //------------------------------------------------------------------------
+      XRootDStatus Write( uint64_t    offset,
+                          uint32_t    size,
+                          DataPipe   &pipe,
+                          uint16_t    timeout = 0 )
+                          XRD_WARN_UNUSED_RESULT;
+
       //------------------------------------------------------------------------
       //! Commit all pending disk writes - async
       //!

src/XrdCl/XrdClPlugInInterface.hh

@@ -30,6 +30,8 @@
 
 namespace XrdCl
 {
+  class DataPipe;
+
   //----------------------------------------------------------------------------
   //! An interface for file plug-ins
   //----------------------------------------------------------------------------
@@ -101,6 +103,19 @@ namespace XrdCl
         return XRootDStatus( stError, errNotImplemented );
       }
 
+      //------------------------------------------------------------------------
+      //! @see XrdCl::File::Write
+      //------------------------------------------------------------------------
+      virtual XRootDStatus Write( uint64_t         offset,
+                                  uint32_t         size,
+                                  DataPipe        &pipe,
+                                  ResponseHandler *handler,
+                                  uint16_t         timeout = 0 )
+      {
+        (void)offset; (void)size; (void)pipe; (void)handler; (void)timeout;
+        return XRootDStatus( stError, errNotImplemented );
+      }
+
       //------------------------------------------------------------------------
       //! @see XrdCl::File::Sync
       //------------------------------------------------------------------------