[PATCH v3 1/8] NFSD: Add a tracepoint to record canceled async COPY operations

[cel@xxxxxxxxxx]

From: Chuck Lever <chuck.lever@xxxxxxxxxx>

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 fs/nfsd/nfs4proc.c |  1 +
 fs/nfsd/trace.h    | 11 ++++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index d32f2dfd148f..9f6617fa5412 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1287,6 +1287,7 @@ static void nfs4_put_copy(struct nfsd4_copy *copy)
 
 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
 {
+	trace_nfsd_copy_async_cancel(copy);
 	if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, &copy->cp_flags))
 		kthread_stop(copy->copy_task);
 	nfs4_put_copy(copy);
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index b8470d4cbe99..acbc7f37cdc5 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -2232,7 +2232,7 @@ TRACE_EVENT(nfsd_copy_done,
 	)
 );
 
-TRACE_EVENT(nfsd_copy_async_done,
+DECLARE_EVENT_CLASS(nfsd_copy_async_done_class,
 	TP_PROTO(
 		const struct nfsd4_copy *copy
 	),
@@ -2301,6 +2301,15 @@ TRACE_EVENT(nfsd_copy_async_done,
 	)
 );
 
+#define DEFINE_COPY_ASYNC_DONE_EVENT(name)		\
+DEFINE_EVENT(nfsd_copy_async_done_class,		\
+	nfsd_copy_async_##name,				\
+	TP_PROTO(const struct nfsd4_copy *copy),	\
+	TP_ARGS(copy))
+
+DEFINE_COPY_ASYNC_DONE_EVENT(done);
+DEFINE_COPY_ASYNC_DONE_EVENT(cancel);
+
 #endif /* _NFSD_TRACE_H */
 
 #undef TRACE_INCLUDE_PATH
-- 
2.47.0