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xprtrdma: Trace marshaling failures 

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@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2019-04-24 09:39:48 -04:00 committed by Anna Schumaker
parent 4ba02e8d0e
commit 17e4c443c0
2 changed files with 28 additions and 0 deletions
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27
include/trace/events/rpcrdma.h
View File

@ -511,6 +511,33 @@ TRACE_EVENT(xprtrdma_marshal,
)
);
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,

1
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -875,6 +875,7 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst)
return 0;
out_err:
trace_xprtrdma_marshal_failed(rqst, ret);
switch (ret) {
case -EAGAIN:
xprt_wait_for_buffer_space(rqst->rq_xprt);