ksmbd: support access-based directory enumeration

SMB shares can advertise access-based directory enumeration. ksmbd does
not currently provide a share option or filter inaccessible directory
entries.

Add a hide-unreadable share flag and advertise
SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM when it is enabled. During
QUERY_DIRECTORY, omit entries unless the connected user has
FILE_READ_DATA, FILE_READ_EA, and FILE_READ_ATTRIBUTES access according
to the Windows ACL.

Keep the existing implicit access allowances for normal CREATE
permission checks while using strict access-mask matching for directory
enumeration.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions