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    Subject[PATCH v5 10/40] netfs: Add a ->free_subrequest() op
    Date
    Add a ->free_subrequest() op so that the netfs can clean up data attached
    to a subrequest.

    Signed-off-by: David Howells <dhowells@redhat.com>
    Reviewed-by: Jeff Layton <jlayton@kernel.org>
    cc: linux-cachefs@redhat.com
    cc: linux-fsdevel@vger.kernel.org
    cc: linux-mm@kvack.org
    ---
    fs/netfs/objects.c | 2 ++
    include/linux/netfs.h | 1 +
    2 files changed, 3 insertions(+)

    diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c
    index c4229c5f3f54..1bd20bdad983 100644
    --- a/fs/netfs/objects.c
    +++ b/fs/netfs/objects.c
    @@ -145,6 +145,8 @@ static void netfs_free_subrequest(struct netfs_io_subrequest *subreq,
    struct netfs_io_request *rreq = subreq->rreq;

    trace_netfs_sreq(subreq, netfs_sreq_trace_free);
    + if (rreq->netfs_ops->free_subrequest)
    + rreq->netfs_ops->free_subrequest(subreq);
    kfree(subreq);
    netfs_stat_d(&netfs_n_rh_sreq);
    netfs_put_request(rreq, was_async, netfs_rreq_trace_put_subreq);
    diff --git a/include/linux/netfs.h b/include/linux/netfs.h
    index d6f27000eeb0..06f57d9d09f6 100644
    --- a/include/linux/netfs.h
    +++ b/include/linux/netfs.h
    @@ -214,6 +214,7 @@ struct netfs_request_ops {
    unsigned int io_subrequest_size; /* Alloc size for netfs_io_subrequest struct */
    int (*init_request)(struct netfs_io_request *rreq, struct file *file);
    void (*free_request)(struct netfs_io_request *rreq);
    + void (*free_subrequest)(struct netfs_io_subrequest *rreq);

    void (*expand_readahead)(struct netfs_io_request *rreq);
    bool (*clamp_length)(struct netfs_io_subrequest *subreq);

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