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sunrpc: Add rpc_request static trace point 

Display information about the RPC procedure being requested in the
trace log. This sometimes critical information cannot always be
derived from other RPC trace entries.

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 2017-11-03 13:46:14 -04:00 committed by Anna Schumaker
parent b2bfe5915d
commit c435da68b6
2 changed files with 31 additions and 2 deletions
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30
include/trace/events/sunrpc.h
View File

@ -70,6 +70,36 @@ TRACE_EVENT(rpc_connect_status,
__entry->status)
);
TRACE_EVENT(rpc_request,
TP_PROTO(const struct rpc_task *task),
TP_ARGS(task),
TP_STRUCT__entry(
__field(unsigned int, task_id)
__field(unsigned int, client_id)
__field(int, version)
__field(bool, async)
__string(progname, task->tk_client->cl_program->name)
__string(procname, rpc_proc_name(task))
),
TP_fast_assign(
__entry->task_id = task->tk_pid;
__entry->client_id = task->tk_client->cl_clid;
__entry->version = task->tk_client->cl_vers;
__entry->async = RPC_IS_ASYNC(task);
__assign_str(progname, task->tk_client->cl_program->name)
__assign_str(procname, rpc_proc_name(task))
),
TP_printk("task:%u@%u %sv%d %s (%ssync)",
__entry->task_id, __entry->client_id,
__get_str(progname), __entry->version,
__get_str(procname), __entry->async ? "a": ""
)
);
DECLARE_EVENT_CLASS(rpc_task_running,
TP_PROTO(const struct rpc_clnt *clnt, const struct rpc_task *task, const void *action),

3
net/sunrpc/clnt.c
View File

@ -1491,7 +1491,6 @@ rpc_restart_call(struct rpc_task *task)
}
EXPORT_SYMBOL_GPL(rpc_restart_call);
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
const char
*rpc_proc_name(const struct rpc_task *task)
{
@ -1505,7 +1504,6 @@ const char
} else
return "no proc";
}
#endif
/*
* 0. Initial state
@ -1519,6 +1517,7 @@ call_start(struct rpc_task *task)
struct rpc_clnt *clnt = task->tk_client;
int idx = task->tk_msg.rpc_proc->p_statidx;
trace_rpc_request(task);
dprintk("RPC: %5u call_start %s%d proc %s (%s)\n", task->tk_pid,
clnt->cl_program->name, clnt->cl_vers,
rpc_proc_name(task),