Record an event when rpcrdma_marshal_req returns a non-zero return
value to help track down why an xprt close might have occurred.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
include/trace/events/rpcrdma.h | 27 +++++++++++++++++++++++++++
net/sunrpc/xprtrdma/rpc_rdma.c | 1 +
2 files changed, 28 insertions(+)
diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h
index 962975b..df9851cb 100644
--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h
@@ -511,6 +511,33 @@
)
);
+TRACE_EVENT(xprtrdma_marshal_failed,
+ TP_PROTO(const struct rpc_rqst *rqst,
+ int ret
+ ),
+
+ TP_ARGS(rqst, ret),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, task_id)
+ __field(unsigned int, client_id)
+ __field(u32, xid)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->task_id = rqst->rq_task->tk_pid;
+ __entry->client_id = rqst->rq_task->tk_client->cl_clid;
+ __entry->xid = be32_to_cpu(rqst->rq_xid);
+ __entry->ret = ret;
+ ),
+
+ TP_printk("task:%u@%u xid=0x%08x: ret=%d",
+ __entry->task_id, __entry->client_id, __entry->xid,
+ __entry->ret
+ )
+);
+
TRACE_EVENT(xprtrdma_post_send,
TP_PROTO(
const struct rpcrdma_req *req,
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 231a44b..45cba06 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -875,6 +875,7 @@ static bool rpcrdma_prepare_msg_sges(struct rpcrdma_xprt *r_xprt,
return 0;
out_err:
+ trace_xprtrdma_marshal_failed(rqst, ret);
switch (ret) {
case -EAGAIN:
xprt_wait_for_buffer_space(rqst->rq_xprt);
