tune the buffer size for reading file

configurable completion queue for async calls

nullable attr

copy smb file

allows to fetch a folder as smbitem

redesign auth

improve configuration of smb provider and error codes

improve sample code

redesign smb auth request delegate

add creationTime to smbItem

add smb configuration

remove arch armv7s from defauil build for samba libs

stoppable copy operations

Fix remove dir issue

merge