ksmbd: support empty snapshot enumeration

FSCTL_SRV_ENUM_SNAPS is currently unimplemented, causing clients to
treat shadow-copy enumeration as unsupported even when the share simply
has no snapshots.

Handle the count-only SRV_SNAPSHOT_ARRAY request and return a valid
empty snapshot list after validating the file handle and minimum output
buffer size. Report a two-byte empty UTF-16 MULTI_SZ array and zero
snapshot counts.

This allows smb2.ioctl.shadow_copy to run without a snapshot backend.

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

0 files changed, 0 insertions, 0 deletions