Hello Everyone, Here is a resend of the 12th version of my cleaned-up / refactored version of the VirtualBox shared-folder VFS driver. It seems that for some reason only the cover letter of my initial-posting of v12 has made it to the list. This version hopefully addresses all issues pointed out in David Howell's review of v11 (thank you for the review David): Changes in v12: -Move make_kuid / make_kgid calls to option parsing time and add uid_valid / gid_valid checks. -In init_fs_context call current_uid_gid() to init uid and gid -Validate dmode, fmode, dmask and fmask options during option parsing -Use correct types for various mount option variables (kuid_t, kgid_t, umode_t) -Some small coding-style tweaks For changes in older versions see the change log in the patch. This version has been used by several distributions (arch, Fedora) for a while now, so hopefully we can get this upstream soonish, please review. Regards, Hans