On Nov 16, 2022, at 10:44 PM, Dai Ngo [off-list ref] wrote:

Add tracepoints to trace start and end of CB_RECALL_ANY operation.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
---
fs/nfsd/nfs4state.c |  2 ++
fs/nfsd/trace.h     | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 51 insertions(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 13f326ae928c..935d669e2526 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c

@@ -2859,6 +2859,7 @@ static int

nfsd4_cb_recall_any_done(struct nfsd4_callback *cb,
				struct rpc_task *task)
{
+	trace_nfsd_cb_recall_any_done(cb, task);
	switch (task->tk_status) {
	case -NFS4ERR_DELAY:
		rpc_delay(task, 2 * HZ);

@@ -6209,6 +6210,7 @@ deleg_reaper(struct nfsd_net *nn)

		clp->cl_ra->ra_keep = 0;
		clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG) |
						BIT(RCA4_TYPE_MASK_WDATA_DLG);
+		trace_nfsd_cb_recall_any(clp->cl_ra);
		nfsd4_run_cb(&clp->cl_ra->ra_cb);
	}
}

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 06a96e955bd0..bee951c335f1 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h

@@ -9,9 +9,11 @@

#define _NFSD_TRACE_H

#include <linux/tracepoint.h>
+#include <linux/sunrpc/xprt.h>

#include "export.h"
#include "nfsfh.h"
+#include "xdr4.h"

#define NFSD_TRACE_PROC_RES_FIELDS \
		__field(unsigned int, netns_ino) \

@@ -1471,6 +1473,53 @@ TRACE_EVENT(nfsd_cb_offload,

		__entry->fh_hash, __entry->count, __entry->status)
);

+TRACE_EVENT(nfsd_cb_recall_any,
+	TP_PROTO(
+		const struct nfsd4_cb_recall_any *ra
+	),
+	TP_ARGS(ra),
+	TP_STRUCT__entry(
+		__field(u32, cl_boot)
+		__field(u32, cl_id)
+		__field(u32, ra_keep)
+		__field(u32, ra_bmval)
+		__sockaddr(addr, sizeof(struct sockaddr_storage))
+	),
+	TP_fast_assign(
+		__entry->cl_boot = ra->ra_cb.cb_clp->cl_clientid.cl_boot;
+		__entry->cl_id = ra->ra_cb.cb_clp->cl_clientid.cl_id;
+		__entry->ra_keep = ra->ra_keep;
+		__entry->ra_bmval = ra->ra_bmval[0];
+		__assign_sockaddr(addr, &ra->ra_cb.cb_clp->cl_addr,
+				  sizeof(struct sockaddr_storage))
+	),
+	TP_printk("Client %08x:%08x addr=%pISpc ra_keep=%d ra_bmval=0x%x",
+		__entry->cl_boot, __entry->cl_id,
+		__get_sockaddr(addr), __entry->ra_keep, __entry->ra_bmval