Index: samba/source/include/smb.h
===================================================================
--- samba/source/include/smb.h.orig
+++ samba/source/include/smb.h
@@ -520,6 +520,7 @@ typedef struct files_struct {
 	BOOL modified;
 	BOOL is_directory;
 	BOOL is_stat;
+	BOOL is_sendfile_capable;
 	BOOL aio_write_behind;
 	BOOL lockdb_clean;
 	BOOL initial_delete_on_close; /* Only set at NTCreateX if file was created. */
Index: samba/source/modules/vfs_default.c
===================================================================
--- samba/source/modules/vfs_default.c.orig
+++ samba/source/modules/vfs_default.c
@@ -195,6 +195,11 @@ static int vfswrap_open(vfs_handle_struc
 	START_PROFILE(syscall_open);
 	result = sys_open(fname, flags, mode);
 	END_PROFILE(syscall_open);
+
+	if (result != -1) {
+		fsp->is_sendfile_capable = lp_use_sendfile(SNUM(handle->conn));
+	}
+
 	return result;
 }
 
Index: samba/source/smbd/reply.c
===================================================================
--- samba/source/smbd/reply.c.orig
+++ samba/source/smbd/reply.c
@@ -2217,7 +2217,7 @@ void send_file_readbraw(connection_struc
 	 */
 
 	if ( (chain_size == 0) && (nread > 0) &&
-	    (fsp->wcp == NULL) && lp_use_sendfile(SNUM(conn)) ) {
+	    (fsp->wcp == NULL) && (fsp->is_sendfile_capable) ) {
 		DATA_BLOB header;
 
 		_smb_setlen(outbuf,nread);
@@ -2560,7 +2560,7 @@ int send_file_readX(connection_struct *c
 	 */
 
 	if ((chain_size == 0) && (CVAL(inbuf,smb_vwv0) == 0xFF) &&
-	    lp_use_sendfile(SNUM(conn)) && (fsp->wcp == NULL) ) {
+	    (fsp->is_sendfile_capable) && (fsp->wcp == NULL) ) {
 		SMB_STRUCT_STAT sbuf;
 		DATA_BLOB header;