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SUNRPC: Clean up call_bind_status() observability 

Time to remove dprintk call sites in here.

Regarding the rpc_bind_status tracepoint: It's friendlier to
administrators if they don't have to look up the error code to
figure out what went wrong. Replace trace_rpc_bind_status with a
set of tracepoints that report more specifically what the problem
was, and what RPC program/version was being queried.

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 2020-07-08 16:10:14 -04:00 committed by Anna Schumaker
parent fd66e2a79d
commit 42ebfc2cbf
2 changed files with 19 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/trace/events/sunrpc.h
View File

@ -259,7 +259,6 @@ DECLARE_EVENT_CLASS(rpc_task_status,
TP_ARGS(task))
DEFINE_RPC_STATUS_EVENT(call);
DEFINE_RPC_STATUS_EVENT(bind);
DEFINE_RPC_STATUS_EVENT(connect);
DEFINE_RPC_STATUS_EVENT(timeout);
DEFINE_RPC_STATUS_EVENT(retry_refresh);
@ -520,6 +519,19 @@ DEFINE_RPC_REPLY_EVENT(stale_creds);
DEFINE_RPC_REPLY_EVENT(bad_creds);
DEFINE_RPC_REPLY_EVENT(auth_tooweak);
#define DEFINE_RPCB_ERROR_EVENT(name) \
DEFINE_EVENT(rpc_reply_event, rpcb_##name##_err, \
TP_PROTO( \
const struct rpc_task *task \
), \
TP_ARGS(task))
DEFINE_RPCB_ERROR_EVENT(prog_unavail);
DEFINE_RPCB_ERROR_EVENT(timeout);
DEFINE_RPCB_ERROR_EVENT(bind_version);
DEFINE_RPCB_ERROR_EVENT(unreachable);
DEFINE_RPCB_ERROR_EVENT(unrecognized);
TRACE_EVENT(rpc_buf_alloc,
TP_PROTO(
const struct rpc_task *task,

20
net/sunrpc/clnt.c
View File

@ -1957,7 +1957,6 @@ call_bind_status(struct rpc_task *task)
return;
}
trace_rpc_bind_status(task);
if (task->tk_status >= 0)
goto out_next;
if (xprt_bound(xprt)) {
@ -1967,12 +1966,10 @@ call_bind_status(struct rpc_task *task)
switch (task->tk_status) {
case -ENOMEM:
dprintk("RPC: %5u rpcbind out of memory\n", task->tk_pid);
rpc_delay(task, HZ >> 2);
goto retry_timeout;
case -EACCES:
dprintk("RPC: %5u remote rpcbind: RPC program/version "
"unavailable\n", task->tk_pid);
trace_rpcb_prog_unavail_err(task);
/* fail immediately if this is an RPC ping */
if (task->tk_msg.rpc_proc->p_proc == 0) {
status = -EOPNOTSUPP;
@ -1989,17 +1986,14 @@ call_bind_status(struct rpc_task *task)
case -EAGAIN:
goto retry_timeout;
case -ETIMEDOUT:
dprintk("RPC: %5u rpcbind request timed out\n",
task->tk_pid);
trace_rpcb_timeout_err(task);
goto retry_timeout;
case -EPFNOSUPPORT:
/* server doesn't support any rpcbind version we know of */
dprintk("RPC: %5u unrecognized remote rpcbind service\n",
task->tk_pid);
trace_rpcb_bind_version_err(task);
break;
case -EPROTONOSUPPORT:
dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n",
task->tk_pid);
trace_rpcb_bind_version_err(task);
goto retry_timeout;
case -ECONNREFUSED: /* connection problems */
case -ECONNRESET:
@ -2010,8 +2004,7 @@ call_bind_status(struct rpc_task *task)
case -EHOSTUNREACH:
case -ENETUNREACH:
case -EPIPE:
dprintk("RPC: %5u remote rpcbind unreachable: %d\n",
task->tk_pid, task->tk_status);
trace_rpcb_unreachable_err(task);
if (!RPC_IS_SOFTCONN(task)) {
rpc_delay(task, 5*HZ);
goto retry_timeout;
@ -2019,8 +2012,7 @@ call_bind_status(struct rpc_task *task)
status = task->tk_status;
break;
default:
dprintk("RPC: %5u unrecognized rpcbind error (%d)\n",
task->tk_pid, -task->tk_status);
trace_rpcb_unrecognized_err(task);
}
rpc_call_rpcerror(task, status);