[PATCH v4 3/3] NFSD: add CB_RECALL_ANY tracepoints

[Dai Ngo <dai.ngo@xxxxxxxxxx>]

Add tracepoints to trace start and end of CB_RECALL_ANY operation.

Signed-off-by: Dai Ngo <dai.ngo@xxxxxxxxxx>
---
 fs/nfsd/nfs4state.c |  2 ++
 fs/nfsd/trace.h     | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 813cdb67b370..eac7212c9218 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);
@@ -6242,6 +6243,7 @@ deleg_reaper(struct work_struct *deleg_work)
 		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..efc69c96bcbd 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) \
@@ -1510,6 +1512,57 @@ DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_notify_lock_done);
 DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_layout_done);
 DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_offload_done);
 
+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)
+		__array(unsigned char, addr, sizeof(struct sockaddr_in6))
+	),
+	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];
+		memcpy(__entry->addr, &ra->ra_cb.cb_clp->cl_addr,
+			sizeof(struct sockaddr_in6));
+	),
+	TP_printk("client %08x:%08x addr=%pISpc ra_keep=%d ra_bmval=0x%x",
+		__entry->cl_boot, __entry->cl_id,
+		__entry->addr, __entry->ra_keep, __entry->ra_bmval
+	)
+);
+
+TRACE_EVENT(nfsd_cb_recall_any_done,
+	TP_PROTO(
+		const struct nfsd4_callback *cb,
+		const struct rpc_task *task
+	),
+	TP_ARGS(cb, task),
+	TP_STRUCT__entry(
+		__field(u32, cl_boot)
+		__field(u32, cl_id)
+		__field(int, status)
+		__array(unsigned char, addr, sizeof(struct sockaddr_in6))
+	),
+	TP_fast_assign(
+		__entry->status = task->tk_status;
+		__entry->cl_boot = cb->cb_clp->cl_clientid.cl_boot;
+		__entry->cl_id = cb->cb_clp->cl_clientid.cl_id;
+		memcpy(__entry->addr, &cb->cb_clp->cl_addr,
+			sizeof(struct sockaddr_in6));
+	),
+	TP_printk("client %08x:%08x addr=%pISpc status=%d",
+		__entry->cl_boot, __entry->cl_id,
+		__entry->addr, __entry->status
+	)
+);
+
 #endif /* _NFSD_TRACE_H */
 
 #undef TRACE_INCLUDE_PATH
-- 
2.9.5