xprtrdma: Replace rpcrdma_rep::rr_buffer with rr_rxprt

Clean up: Instead of carrying a pointer to the buffer pool and
the rpc_xprt, carry a pointer to the controlling rpcrdma_xprt.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 2c53ea9..98a3b95 100644 (file)
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -732,8 +732,8 @@ rpcrdma_reply_handler(struct rpcrdma_rep *rep)
        struct rpcrdma_msg *headerp;
        struct rpcrdma_req *req;
        struct rpc_rqst *rqst;
-       struct rpc_xprt *xprt = rep->rr_xprt;
-       struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
+       struct rpcrdma_xprt *r_xprt = rep->rr_rxprt;
+       struct rpc_xprt *xprt = &r_xprt->rx_xprt;
        __be32 *iptr;
        int rdmalen, status;
        unsigned long cwnd;

diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 54f23b1..ce95eb3 100644 (file)
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -617,12 +617,9 @@ xprt_rdma_send_request(struct rpc_task *task)
 
        if (req->rl_reply == NULL)              /* e.g. reconnection */
                rpcrdma_recv_buffer_get(req);
-
-       if (req->rl_reply) {
+       /* rpcrdma_recv_buffer_get may have set rl_reply, so check again */
+       if (req->rl_reply)
                req->rl_reply->rr_func = rpcrdma_reply_handler;
-               /* this need only be done once, but... */
-               req->rl_reply->rr_xprt = xprt;
-       }
 
        /* Must suppress retransmit to maintain credits */
        if (req->rl_connect_cookie == xprt->connect_cookie)

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 51900e6..c55bfbc 100644 (file)
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -278,6 +278,7 @@ rpcrdma_recvcq_process_wc(struct ib_wc *wc, struct list_head *sched_list)
 {
        struct rpcrdma_rep *rep =
                        (struct rpcrdma_rep *)(unsigned long)wc->wr_id;
+       struct rpcrdma_ia *ia;
 
        /* WARNING: Only wr_id and status are reliable at this point */
        if (wc->status != IB_WC_SUCCESS)
@@ -290,8 +291,9 @@ rpcrdma_recvcq_process_wc(struct ib_wc *wc, struct list_head *sched_list)
        dprintk("RPC:       %s: rep %p opcode 'recv', length %u: success\n",
                __func__, rep, wc->byte_len);
 
+       ia = &rep->rr_rxprt->rx_ia;
        rep->rr_len = wc->byte_len;
-       ib_dma_sync_single_for_cpu(rdmab_to_ia(rep->rr_buffer)->ri_id->device,
+       ib_dma_sync_single_for_cpu(ia->ri_id->device,
                                   rdmab_addr(rep->rr_rdmabuf),
                                   rep->rr_len, DMA_FROM_DEVICE);
        prefetch(rdmab_to_msg(rep->rr_rdmabuf));
@@ -1053,7 +1055,7 @@ rpcrdma_create_rep(struct rpcrdma_xprt *r_xprt)
                goto out_free;
        }
 
-       rep->rr_buffer = &r_xprt->rx_buf;
+       rep->rr_rxprt = r_xprt;
        return rep;
 
 out_free:
@@ -1423,7 +1425,7 @@ rpcrdma_recv_buffer_get(struct rpcrdma_req *req)
 void
 rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep)
 {
-       struct rpcrdma_buffer *buffers = rep->rr_buffer;
+       struct rpcrdma_buffer *buffers = &rep->rr_rxprt->rx_buf;
        unsigned long flags;
 
        rep->rr_func = NULL;

diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 78e0b8b..c3d57c0 100644 (file)
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -173,8 +173,7 @@ struct rpcrdma_buffer;
 
 struct rpcrdma_rep {
        unsigned int            rr_len;
-       struct rpcrdma_buffer   *rr_buffer;
-       struct rpc_xprt         *rr_xprt;
+       struct rpcrdma_xprt     *rr_rxprt;
        void                    (*rr_func)(struct rpcrdma_rep *);
        struct list_head        rr_list;
        struct rpcrdma_regbuf   *rr_rdmabuf;