• Fred Isaman's avatar
    NFS: create common nfs_pgio_header for both read and write · cd841605
    Fred Isaman authored
    In order to avoid duplicating all the data in nfs_read_data whenever we
    split it up into multiple RPC calls (either due to a short read result
    or due to rsize < PAGE_SIZE), we split out the bits that are the same
    per RPC call into a separate "header" structure.
    
    The goal this patch moves towards is to have a single header
    refcounted by several rpc_data structures.  Thus, want to always refer
    from rpc_data to the header, and not the other way.  This patch comes
    close to that ideal, but the directio code currently needs some
    special casing, isolated in the nfs_direct_[read_write]hdr_release()
    functions.  This will be dealt with in a future patch.
    Signed-off-by: default avatarFred Isaman <iisaman@netapp.com>
    Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
    cd841605
nfs4filelayout.c 31.7 KB