diff mbox series

[RFC,17/21] NFSD: Add a tracepoint for DELEGRETURN

Message ID 160029262289.29208.7879301642908653952.stgit@klimt.1015granger.net (mailing list archive)
State New, archived
Headers show
Series NFSD operation monitoring tracepoints | expand

Commit Message

Chuck Lever Sept. 16, 2020, 9:43 p.m. UTC 
Record the stateid being returned to help troubleshoot problems
with delegation. The status code is reported by the
nfsd_compound_status tracepoint.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs4state.c |    2 ++
 fs/nfsd/trace.h     |   26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
diff mbox series

Patch

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6509e431ddd2..8444e8b51fa8 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -6302,6 +6302,8 @@  nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	__be32 status;
 	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
 
+	trace_nfsd4_delegreturn(rqstp, stateid);
+
 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
 		return status;
 
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index cf350f37ddc9..2e4697324aa8 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -510,6 +510,32 @@  TRACE_EVENT(nfsd4_stateid_prep,
 	)
 );
 
+TRACE_EVENT(nfsd4_delegreturn,
+	TP_PROTO(
+		const struct svc_rqst *rqstp,
+		const stateid_t *stp
+	),
+	TP_ARGS(rqstp, stp),
+	TP_STRUCT__entry(
+		__field(u32, xid)
+		__field(u32, cl_boot)
+		__field(u32, cl_id)
+		__field(u32, si_id)
+		__field(u32, si_generation)
+	),
+	TP_fast_assign(
+		__entry->xid = be32_to_cpu(rqstp->rq_xid);
+		__entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
+		__entry->cl_id = stp->si_opaque.so_clid.cl_id;
+		__entry->si_id = stp->si_opaque.so_id;
+		__entry->si_generation = stp->si_generation;
+	),
+	TP_printk("xid=0x%08x client %08x:%08x stateid %08x:%08x",
+		__entry->xid, __entry->cl_boot, __entry->cl_id,
+		__entry->si_id, __entry->si_generation
+	)
+);
+
 DECLARE_EVENT_CLASS(nfsd_stateid_class,
 	TP_PROTO(stateid_t *stp),
 	TP_ARGS(stp),