Move the call encoding so that it occurs before the transport connection
etc.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
include/linux/sunrpc/xprt.h | 1 +
net/sunrpc/clnt.c | 81 ++++++++++++++++++++++---------------
net/sunrpc/xprt.c | 22 +++++-----
3 files changed, 63 insertions(+), 41 deletions(-)
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 81a6c2c8dfc7..b8a7de161f67 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -347,6 +347,7 @@ bool xprt_prepare_transmit(struct rpc_task *task);
void xprt_request_enqueue_transmit(struct rpc_task *task);
void xprt_request_enqueue_receive(struct rpc_task *task);
void xprt_request_wait_receive(struct rpc_task *task);
+bool xprt_request_need_retransmit(struct rpc_task *task);
void xprt_transmit(struct rpc_task *task);
void xprt_end_transmit(struct rpc_task *task);
int xprt_adjust_timeout(struct rpc_rqst *req);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index c1a19a3e1356..64159716be30 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -61,6 +61,7 @@ static void call_start(struct rpc_task *task);
static void call_reserve(struct rpc_task *task);
static void call_reserveresult(struct rpc_task *task);
static void call_allocate(struct rpc_task *task);
+static void call_encode(struct rpc_task *task);
static void call_decode(struct rpc_task *task);
static void call_bind(struct rpc_task *task);
static void call_bind_status(struct rpc_task *task);
@@ -1140,7 +1141,8 @@ struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req)
struct xdr_buf *xbufp = &req->rq_snd_buf;
struct rpc_task_setup task_setup_data = {
.callback_ops = &rpc_default_ops,
- .flags = RPC_TASK_SOFTCONN,
+ .flags = RPC_TASK_SOFTCONN |
+ RPC_TASK_NO_RETRANS_TIMEOUT,
};
dprintk("RPC: rpc_run_bc_task req= %p\n", req);
@@ -1160,7 +1162,6 @@ struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req)
task->tk_action = call_bc_transmit;
atomic_inc(&task->tk_count);
WARN_ON_ONCE(atomic_read(&task->tk_count) != 2);
- xprt_request_enqueue_transmit(task);
rpc_execute(task);
dprintk("RPC: rpc_run_bc_task: task= %p\n", task);
@@ -1680,7 +1681,7 @@ call_allocate(struct rpc_task *task)
dprint_status(task);
task->tk_status = 0;
- task->tk_action = call_bind;
+ task->tk_action = call_encode;
if (req->rq_buffer)
return;
@@ -1724,12 +1725,12 @@ call_allocate(struct rpc_task *task)
static int
rpc_task_need_encode(struct rpc_task *task)
{
- return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0;
+ return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0 &&
+ (!(task->tk_flags & RPC_TASK_SENT) ||
+ !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) ||
+ xprt_request_need_retransmit(task));
}
-/*
- * 3. Encode arguments of an RPC call
- */
static void
rpc_xdr_encode(struct rpc_task *task)
{
@@ -1745,6 +1746,7 @@ rpc_xdr_encode(struct rpc_task *task)
xdr_buf_init(&req->rq_rcv_buf,
req->rq_rbuffer,
req->rq_rcvsize);
+ req->rq_bytes_sent = 0;
p = rpc_encode_header(task);
if (p == NULL) {
@@ -1761,6 +1763,34 @@ rpc_xdr_encode(struct rpc_task *task)
task->tk_msg.rpc_argp);
}
+/*
+ * 3. Encode arguments of an RPC call
+ */
+static void
+call_encode(struct rpc_task *task)
+{
+ if (!rpc_task_need_encode(task))
+ goto out;
+ /* Encode here so that rpcsec_gss can use correct sequence number. */
+ rpc_xdr_encode(task);
+ /* Did the encode result in an error condition? */
+ if (task->tk_status != 0) {
+ /* Was the error nonfatal? */
+ if (task->tk_status == -EAGAIN)
+ rpc_delay(task, HZ >> 4);
+ else
+ rpc_exit(task, task->tk_status);
+ return;
+ }
+
+ /* Add task to reply queue before transmission to avoid races */
+ if (rpc_reply_expected(task))
+ xprt_request_enqueue_receive(task);
+ xprt_request_enqueue_transmit(task);
+out:
+ task->tk_action = call_bind;
+}
+
/*
* 4. Get the server port number if not yet set
*/
@@ -1945,24 +1975,8 @@ call_transmit(struct rpc_task *task)
dprint_status(task);
task->tk_action = call_transmit_status;
- /* Encode here so that rpcsec_gss can use correct sequence number. */
- if (rpc_task_need_encode(task)) {
- rpc_xdr_encode(task);
- /* Did the encode result in an error condition? */
- if (task->tk_status != 0) {
- /* Was the error nonfatal? */
- if (task->tk_status == -EAGAIN)
- rpc_delay(task, HZ >> 4);
- else
- rpc_exit(task, task->tk_status);
- return;
- }
- }
-
- /* Add task to reply queue before transmission to avoid races */
- if (rpc_reply_expected(task))
- xprt_request_enqueue_receive(task);
- xprt_request_enqueue_transmit(task);
+ if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate))
+ return;
if (!xprt_prepare_transmit(task))
return;
@@ -1997,9 +2011,9 @@ call_transmit_status(struct rpc_task *task)
xprt_end_transmit(task);
break;
case -EBADMSG:
- task->tk_action = call_transmit;
- task->tk_status = 0;
xprt_end_transmit(task);
+ task->tk_status = 0;
+ task->tk_action = call_encode;
break;
/*
* Special cases: if we've been waiting on the
@@ -2048,6 +2062,9 @@ call_bc_transmit(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
+ if (rpc_task_need_encode(task))
+ xprt_request_enqueue_transmit(task);
+
if (!xprt_prepare_transmit(task))
goto out_retry;
@@ -2169,7 +2186,7 @@ call_status(struct rpc_task *task)
case -EPIPE:
case -ENOTCONN:
case -EAGAIN:
- task->tk_action = call_bind;
+ task->tk_action = call_encode;
break;
case -EIO:
/* shutdown or soft timeout */
@@ -2234,7 +2251,7 @@ call_timeout(struct rpc_task *task)
rpcauth_invalcred(task);
retry:
- task->tk_action = call_bind;
+ task->tk_action = call_encode;
task->tk_status = 0;
}
@@ -2278,7 +2295,7 @@ call_decode(struct rpc_task *task)
if (req->rq_rcv_buf.len < 12) {
if (!RPC_IS_SOFT(task)) {
- task->tk_action = call_bind;
+ task->tk_action = call_encode;
goto out_retry;
}
dprintk("RPC: %s: too small RPC reply size (%d bytes)\n",
@@ -2409,7 +2426,7 @@ rpc_verify_header(struct rpc_task *task)
task->tk_garb_retry--;
dprintk("RPC: %5u %s: retry garbled creds\n",
task->tk_pid, __func__);
- task->tk_action = call_bind;
+ task->tk_action = call_encode;
goto out_retry;
case RPC_AUTH_TOOWEAK:
printk(KERN_NOTICE "RPC: server %s requires stronger "
@@ -2478,7 +2495,7 @@ rpc_verify_header(struct rpc_task *task)
task->tk_garb_retry--;
dprintk("RPC: %5u %s: retrying\n",
task->tk_pid, __func__);
- task->tk_action = call_bind;
+ task->tk_action = call_encode;
out_retry:
return ERR_PTR(-EAGAIN);
}
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 39a6f6e8ae01..426a3a05e075 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1057,18 +1057,10 @@ void xprt_request_wait_receive(struct rpc_task *task)
spin_unlock(&xprt->queue_lock);
}
-static bool
-xprt_request_need_transmit(struct rpc_task *task)
-{
- return !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) ||
- xprt_request_retransmit_after_disconnect(task);
-}
-
static bool
xprt_request_need_enqueue_transmit(struct rpc_task *task, struct rpc_rqst *req)
{
- return xprt_request_need_transmit(task) &&
- !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate);
+ return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate);
}
/**
@@ -1123,6 +1115,18 @@ xprt_request_dequeue_transmit(struct rpc_task *task)
spin_unlock(&xprt->queue_lock);
}
+/**
+ * xprt_request_need_retransmit - Test if a task needs retransmission
+ * @task: pointer to rpc_task
+ *
+ * Test for whether a connection breakage requires the task to retransmit
+ */
+bool
+xprt_request_need_retransmit(struct rpc_task *task)
+{
+ return xprt_request_retransmit_after_disconnect(task);
+}
+
/**
* xprt_prepare_transmit - reserve the transport before sending a request
* @task: RPC task about to send a request
--
2.17.1
