[PATCH v4 02/18] NFSD: Add a Call equivalent to the NFSD_TRACE_PROC_RES macros

[cel]

From: Chuck Lever <chuck.lever@xxxxxxxxxx>

Introduce tracing helpers that can be used before the procedure
status code is known. These macros are similar to the
SVC_RQST_ENDPOINT helpers, but they can be modified to include
NFS-specific fields if that is needed later.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 fs/nfsd/trace.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index f67ab3d1b506..fc373c4d5fdd 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -18,6 +18,23 @@
 #include "nfsfh.h"
 #include "xdr4.h"
 
+#define NFSD_TRACE_PROC_CALL_FIELDS(r) \
+		__field(unsigned int, netns_ino) \
+		__field(u32, xid) \
+		__sockaddr(server, (r)->rq_xprt->xpt_locallen) \
+		__sockaddr(client, (r)->rq_xprt->xpt_remotelen)
+
+#define NFSD_TRACE_PROC_CALL_ASSIGNMENTS(r) \
+		do { \
+			struct svc_xprt *xprt = (r)->rq_xprt; \
+			__entry->netns_ino = SVC_NET(r)->ns.inum; \
+			__entry->xid = be32_to_cpu((r)->rq_xid); \
+			__assign_sockaddr(server, &xprt->xpt_local, \
+					  xprt->xpt_locallen); \
+			__assign_sockaddr(client, &xprt->xpt_remote, \
+					  xprt->xpt_remotelen); \
+		} while (0)
+
 #define NFSD_TRACE_PROC_RES_FIELDS(r) \
 		__field(unsigned int, netns_ino) \
 		__field(u32, xid) \
-- 
2.49.0