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    Subject[[PATCH v1] 10/37] [CIFS] SMBD: Introduce wait queue when sending SMBD request
    Date
    From: Long Li <longli@microsoft.com>

    Define wait queue in preparation for implement SMBD send. SMBD uses credit based flow control system, if the client doesn't have enough credits then it must wait for credits.

    Signed-off-by: Long Li <longli@microsoft.com>
    ---
    fs/cifs/cifsrdma.c | 1 +
    fs/cifs/cifsrdma.h | 2 ++
    2 files changed, 3 insertions(+)

    diff --git a/fs/cifs/cifsrdma.c b/fs/cifs/cifsrdma.c
    index 9610897..8aa8a47 100644
    --- a/fs/cifs/cifsrdma.c
    +++ b/fs/cifs/cifsrdma.c
    @@ -484,6 +484,7 @@ struct cifs_rdma_info* cifs_create_rdma_session(
    mempool_free_slab, info->response_cache);

    allocate_receive_buffers(info, info->receive_credit_max);
    + init_waitqueue_head(&info->wait_send_queue);
    out2:
    rdma_destroy_id(info->id);

    diff --git a/fs/cifs/cifsrdma.h b/fs/cifs/cifsrdma.h
    index e925aa4..287b5b1 100644
    --- a/fs/cifs/cifsrdma.h
    +++ b/fs/cifs/cifsrdma.h
    @@ -62,6 +62,8 @@ struct cifs_rdma_info {
    struct list_head receive_queue;
    spinlock_t receive_queue_lock;

    + wait_queue_head_t wait_send_queue;
    +
    // request pool for RDMA send
    struct kmem_cache *request_cache;
    mempool_t *request_mempool;
    --
    2.7.4
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