Invoke a common routine for releasing hardware resources (for
example, invalidating MRs). This needs to be done whether an
RPC Reply has arrived or the RPC was terminated early.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
net/sunrpc/xprtrdma/rpc_rdma.c | 26 ++++++++++++++++----------
net/sunrpc/xprtrdma/transport.c | 6 +++---
net/sunrpc/xprtrdma/xprt_rdma.h | 3 +++
3 files changed, 22 insertions(+), 13 deletions(-)
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 9951c81..853dede 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -1293,6 +1293,20 @@ void rpcrdma_complete_rqst(struct rpcrdma_rep *rep)
goto out;
}
+void rpcrdma_release_rqst(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req)
+{
+ /* Invalidate and unmap the data payloads before waking
+ * the waiting application. This guarantees the memory
+ * regions are properly fenced from the server before the
+ * application accesses the data. It also ensures proper
+ * send flow control: waking the next RPC waits until this
+ * RPC has relinquished all its Send Queue entries.
+ */
+ if (!list_empty(&req->rl_registered))
+ r_xprt->rx_ia.ri_ops->ro_unmap_sync(r_xprt,
+ &req->rl_registered);
+}
+
/* Reply handling runs in the poll worker thread. Anything that
* might wait is deferred to a separate workqueue.
*/
@@ -1301,18 +1315,9 @@ void rpcrdma_deferred_completion(struct work_struct *work)
struct rpcrdma_rep *rep =
container_of(work, struct rpcrdma_rep, rr_work);
struct rpcrdma_req *req = rpcr_to_rdmar(rep->rr_rqst);
- struct rpcrdma_xprt *r_xprt = rep->rr_rxprt;
- /* Invalidate and unmap the data payloads before waking
- * the waiting application. This guarantees the memory
- * regions are properly fenced from the server before the
- * application accesses the data. It also ensures proper
- * send flow control: waking the next RPC waits until this
- * RPC has relinquished all its Send Queue entries.
- */
rpcrdma_mark_remote_invalidation(&req->rl_registered, rep);
- r_xprt->rx_ia.ri_ops->ro_unmap_sync(r_xprt, &req->rl_registered);
-
+ rpcrdma_release_rqst(rep->rr_rxprt, req);
rpcrdma_complete_rqst(rep);
}
@@ -1374,6 +1379,7 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep)
req = rpcr_to_rdmar(rqst);
req->rl_reply = rep;
rep->rr_rqst = rqst;
+ clear_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
dprintk("RPC: %s: reply %p completes request %p (xid 0x%08x)\n",
__func__, rep, req, be32_to_cpu(rep->rr_xid));
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 74f3cef..0c73439 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -678,15 +678,14 @@
struct rpc_rqst *rqst = task->tk_rqstp;
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
- struct rpcrdma_ia *ia = &r_xprt->rx_ia;
if (test_bit(RPCRDMA_REQ_F_BACKCHANNEL, &req->rl_flags))
return;
dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
- if (!list_empty(&req->rl_registered))
- ia->ri_ops->ro_unmap_sync(r_xprt, &req->rl_registered);
+ if (test_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags))
+ rpcrdma_release_rqst(r_xprt, req);
rpcrdma_buffer_put(req);
}
@@ -745,6 +744,7 @@
goto drop_connection;
req->rl_connect_cookie = xprt->connect_cookie;
+ set_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
goto drop_connection;
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 4175320..c260475 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -386,6 +386,7 @@ struct rpcrdma_req {
/* rl_flags */
enum {
RPCRDMA_REQ_F_BACKCHANNEL = 0,
+ RPCRDMA_REQ_F_PENDING,
};
static inline void
@@ -655,6 +656,8 @@ int rpcrdma_prepare_send_sges(struct rpcrdma_xprt *r_xprt,
void rpcrdma_set_max_header_sizes(struct rpcrdma_xprt *);
void rpcrdma_complete_rqst(struct rpcrdma_rep *rep);
void rpcrdma_reply_handler(struct rpcrdma_rep *rep);
+void rpcrdma_release_rqst(struct rpcrdma_xprt *r_xprt,
+ struct rpcrdma_req *req);
void rpcrdma_deferred_completion(struct work_struct *work);
static inline void rpcrdma_set_xdrlen(struct xdr_buf *xdr, size_t len)
--
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