• Neil Brown's avatar
    [PATCH] knfsd: idempotent replay cache for OPEN state · b8ba293d
    Neil Brown authored
    This implements the idempotent replay cache need for NFSv4 OPEN state.
    each state owner (open owner or lock owner) is required to store the
    last sequence number mutating operation, and retransmit it when replayed
    sequence number is presented for the operation.
    
    I've implemented the cache as a static buffer of size 112 bytes
    (NFSD4_REPLAY_ISIZE) which is large enough to hold the OPEN, the largest
    of the sequence mutation operations.  This implements the cache for
    OPEN, OPEN_CONFIRM, OPEN_DOWNGRADE, and CLOSE.  LOCK and UNLOCK will be
    added when byte-range locking is done (soon!).
    b8ba293d
nfs4proc.c 23.3 KB