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authorChuck Lever <chuck.lever@oracle.com>2017-10-20 17:48:28 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-11-17 21:47:57 +0300
commit0ba6f37012db2f88f881cd818aec6e1886f61abb (patch)
treee1e66327ea39b3d85cd3e4728901f50b97c8a893 /net
parent531cca0c9b17c185377fd081b43ffca953cfecad (diff)
downloadlinux-0ba6f37012db2f88f881cd818aec6e1886f61abb.tar.xz
xprtrdma: Refactor rpcrdma_deferred_completion
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@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c26
-rw-r--r--net/sunrpc/xprtrdma/transport.c6
-rw-r--r--net/sunrpc/xprtrdma/xprt_rdma.h3
3 files changed, 22 insertions, 13 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 9951c81b82ed..853dede38900 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -1293,6 +1293,20 @@ out_badheader:
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 acdb2e9c72c8..35aefe201848 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -678,15 +678,14 @@ xprt_rdma_free(struct rpc_task *task)
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);
}
@@ -742,6 +741,7 @@ xprt_rdma_send_request(struct rpc_task *task)
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 417532069842..c260475baa36 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_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst);
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)