[PATCH] NFSD: Resolve the recall-any mask names in the trace format

[Chuck Lever <cel@kernel.org>]

RCA4_TYPE_MASK_* are enum constants, so the preprocessor cannot fold
them into the print format that show_rca_mask() builds for the
nfsd_cb_recall_any event. Nothing declares an eval map for them
either, so trace_event_eval_update() has no substitution to apply at
module load, and the event's format file ships the enumerator names
verbatim. trace-cmd and perf cannot decode the bmval0 field.

Declare the eval maps for the nine mask bits show_rca_mask() decodes.
The format then carries the shift counts as integers, the same shape
the SUNRPC trace points already emit from their BIT() flag decoders.

Fixes: 638593be55c0 ("NFSD: add CB_RECALL_ANY tracepoints")
Signed-off-by: Chuck Lever <cel@kernel.org>
---
 fs/nfsd/trace.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 3fa4d63cd30f..4fb1f32a3787 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -1946,6 +1946,16 @@ TRACE_EVENT(nfsd_cb_offload,
 		__entry->fh_hash, __entry->count, __entry->status)
 );
 
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_RDATA_DLG);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_WDATA_DLG);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_DIR_DLG);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_FILE_LAYOUT);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_BLK_LAYOUT);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_OBJ_LAYOUT_MIN);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_OBJ_LAYOUT_MAX);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_OTHER_LAYOUT_MIN);
+TRACE_DEFINE_ENUM(RCA4_TYPE_MASK_OTHER_LAYOUT_MAX);
+
 #define show_rca_mask(x) \
 	__print_flags(x, "|", \
 		{ BIT(RCA4_TYPE_MASK_RDATA_DLG),	"RDATA_DLG" }, \
-- 
2.54.0