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Subject[RFC][PATCH 11/17 v2] net/9p/tracing: Export enums in tracepoints to userspace
From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>

The tracepoints in the 9p code use a lot of enums for the __print_symbolic()
function. These enums are shown in the tracepoint format files, and user
space tools such as trace-cmd does not have the information to parse it.
Add helper macros to export the enums with TRACE_DEFINE_ENUM().

Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
include/trace/events/9p.h | 157 ++++++++++++++++++++++++++--------------------
1 file changed, 88 insertions(+), 69 deletions(-)

diff --git a/include/trace/events/9p.h b/include/trace/events/9p.h
index a0666362c111..633ee9ee9778 100644
--- a/include/trace/events/9p.h
+++ b/include/trace/events/9p.h
@@ -6,76 +6,95 @@

#include <linux/tracepoint.h>

+#define P9_MSG_T \
+ EM( P9_TLERROR, "P9_TLERROR" ) \
+ EM( P9_RLERROR, "P9_RLERROR" ) \
+ EM( P9_TSTATFS, "P9_TSTATFS" ) \
+ EM( P9_RSTATFS, "P9_RSTATFS" ) \
+ EM( P9_TLOPEN, "P9_TLOPEN" ) \
+ EM( P9_RLOPEN, "P9_RLOPEN" ) \
+ EM( P9_TLCREATE, "P9_TLCREATE" ) \
+ EM( P9_RLCREATE, "P9_RLCREATE" ) \
+ EM( P9_TSYMLINK, "P9_TSYMLINK" ) \
+ EM( P9_RSYMLINK, "P9_RSYMLINK" ) \
+ EM( P9_TMKNOD, "P9_TMKNOD" ) \
+ EM( P9_RMKNOD, "P9_RMKNOD" ) \
+ EM( P9_TRENAME, "P9_TRENAME" ) \
+ EM( P9_RRENAME, "P9_RRENAME" ) \
+ EM( P9_TREADLINK, "P9_TREADLINK" ) \
+ EM( P9_RREADLINK, "P9_RREADLINK" ) \
+ EM( P9_TGETATTR, "P9_TGETATTR" ) \
+ EM( P9_RGETATTR, "P9_RGETATTR" ) \
+ EM( P9_TSETATTR, "P9_TSETATTR" ) \
+ EM( P9_RSETATTR, "P9_RSETATTR" ) \
+ EM( P9_TXATTRWALK, "P9_TXATTRWALK" ) \
+ EM( P9_RXATTRWALK, "P9_RXATTRWALK" ) \
+ EM( P9_TXATTRCREATE, "P9_TXATTRCREATE" ) \
+ EM( P9_RXATTRCREATE, "P9_RXATTRCREATE" ) \
+ EM( P9_TREADDIR, "P9_TREADDIR" ) \
+ EM( P9_RREADDIR, "P9_RREADDIR" ) \
+ EM( P9_TFSYNC, "P9_TFSYNC" ) \
+ EM( P9_RFSYNC, "P9_RFSYNC" ) \
+ EM( P9_TLOCK, "P9_TLOCK" ) \
+ EM( P9_RLOCK, "P9_RLOCK" ) \
+ EM( P9_TGETLOCK, "P9_TGETLOCK" ) \
+ EM( P9_RGETLOCK, "P9_RGETLOCK" ) \
+ EM( P9_TLINK, "P9_TLINK" ) \
+ EM( P9_RLINK, "P9_RLINK" ) \
+ EM( P9_TMKDIR, "P9_TMKDIR" ) \
+ EM( P9_RMKDIR, "P9_RMKDIR" ) \
+ EM( P9_TRENAMEAT, "P9_TRENAMEAT" ) \
+ EM( P9_RRENAMEAT, "P9_RRENAMEAT" ) \
+ EM( P9_TUNLINKAT, "P9_TUNLINKAT" ) \
+ EM( P9_RUNLINKAT, "P9_RUNLINKAT" ) \
+ EM( P9_TVERSION, "P9_TVERSION" ) \
+ EM( P9_RVERSION, "P9_RVERSION" ) \
+ EM( P9_TAUTH, "P9_TAUTH" ) \
+ EM( P9_RAUTH, "P9_RAUTH" ) \
+ EM( P9_TATTACH, "P9_TATTACH" ) \
+ EM( P9_RATTACH, "P9_RATTACH" ) \
+ EM( P9_TERROR, "P9_TERROR" ) \
+ EM( P9_RERROR, "P9_RERROR" ) \
+ EM( P9_TFLUSH, "P9_TFLUSH" ) \
+ EM( P9_RFLUSH, "P9_RFLUSH" ) \
+ EM( P9_TWALK, "P9_TWALK" ) \
+ EM( P9_RWALK, "P9_RWALK" ) \
+ EM( P9_TOPEN, "P9_TOPEN" ) \
+ EM( P9_ROPEN, "P9_ROPEN" ) \
+ EM( P9_TCREATE, "P9_TCREATE" ) \
+ EM( P9_RCREATE, "P9_RCREATE" ) \
+ EM( P9_TREAD, "P9_TREAD" ) \
+ EM( P9_RREAD, "P9_RREAD" ) \
+ EM( P9_TWRITE, "P9_TWRITE" ) \
+ EM( P9_RWRITE, "P9_RWRITE" ) \
+ EM( P9_TCLUNK, "P9_TCLUNK" ) \
+ EM( P9_RCLUNK, "P9_RCLUNK" ) \
+ EM( P9_TREMOVE, "P9_TREMOVE" ) \
+ EM( P9_RREMOVE, "P9_RREMOVE" ) \
+ EM( P9_TSTAT, "P9_TSTAT" ) \
+ EM( P9_RSTAT, "P9_RSTAT" ) \
+ EM( P9_TWSTAT, "P9_TWSTAT" ) \
+ EMe(P9_RWSTAT, "P9_RWSTAT" )
+
+/* Define EM() to export the enums to userspace via TRACE_DEFINE_ENUM() */
+#undef EM
+#undef EMe
+#define EM(a, b) TRACE_DEFINE_ENUM(a);
+#define EMe(a, b) TRACE_DEFINE_ENUM(a);
+
+P9_MSG_T
+
+/*
+ * Now redefine the EM() and EMe() macros to map the enums to the strings
+ * that will be printed in the output.
+ */
+#undef EM
+#undef EMe
+#define EM(a, b) { a, b },
+#define EMe(a, b) { a, b }
+
#define show_9p_op(type) \
- __print_symbolic(type, \
- { P9_TLERROR, "P9_TLERROR" }, \
- { P9_RLERROR, "P9_RLERROR" }, \
- { P9_TSTATFS, "P9_TSTATFS" }, \
- { P9_RSTATFS, "P9_RSTATFS" }, \
- { P9_TLOPEN, "P9_TLOPEN" }, \
- { P9_RLOPEN, "P9_RLOPEN" }, \
- { P9_TLCREATE, "P9_TLCREATE" }, \
- { P9_RLCREATE, "P9_RLCREATE" }, \
- { P9_TSYMLINK, "P9_TSYMLINK" }, \
- { P9_RSYMLINK, "P9_RSYMLINK" }, \
- { P9_TMKNOD, "P9_TMKNOD" }, \
- { P9_RMKNOD, "P9_RMKNOD" }, \
- { P9_TRENAME, "P9_TRENAME" }, \
- { P9_RRENAME, "P9_RRENAME" }, \
- { P9_TREADLINK, "P9_TREADLINK" }, \
- { P9_RREADLINK, "P9_RREADLINK" }, \
- { P9_TGETATTR, "P9_TGETATTR" }, \
- { P9_RGETATTR, "P9_RGETATTR" }, \
- { P9_TSETATTR, "P9_TSETATTR" }, \
- { P9_RSETATTR, "P9_RSETATTR" }, \
- { P9_TXATTRWALK, "P9_TXATTRWALK" }, \
- { P9_RXATTRWALK, "P9_RXATTRWALK" }, \
- { P9_TXATTRCREATE, "P9_TXATTRCREATE" }, \
- { P9_RXATTRCREATE, "P9_RXATTRCREATE" }, \
- { P9_TREADDIR, "P9_TREADDIR" }, \
- { P9_RREADDIR, "P9_RREADDIR" }, \
- { P9_TFSYNC, "P9_TFSYNC" }, \
- { P9_RFSYNC, "P9_RFSYNC" }, \
- { P9_TLOCK, "P9_TLOCK" }, \
- { P9_RLOCK, "P9_RLOCK" }, \
- { P9_TGETLOCK, "P9_TGETLOCK" }, \
- { P9_RGETLOCK, "P9_RGETLOCK" }, \
- { P9_TLINK, "P9_TLINK" }, \
- { P9_RLINK, "P9_RLINK" }, \
- { P9_TMKDIR, "P9_TMKDIR" }, \
- { P9_RMKDIR, "P9_RMKDIR" }, \
- { P9_TRENAMEAT, "P9_TRENAMEAT" }, \
- { P9_RRENAMEAT, "P9_RRENAMEAT" }, \
- { P9_TUNLINKAT, "P9_TUNLINKAT" }, \
- { P9_RUNLINKAT, "P9_RUNLINKAT" }, \
- { P9_TVERSION, "P9_TVERSION" }, \
- { P9_RVERSION, "P9_RVERSION" }, \
- { P9_TAUTH, "P9_TAUTH" }, \
- { P9_RAUTH, "P9_RAUTH" }, \
- { P9_TATTACH, "P9_TATTACH" }, \
- { P9_RATTACH, "P9_RATTACH" }, \
- { P9_TERROR, "P9_TERROR" }, \
- { P9_RERROR, "P9_RERROR" }, \
- { P9_TFLUSH, "P9_TFLUSH" }, \
- { P9_RFLUSH, "P9_RFLUSH" }, \
- { P9_TWALK, "P9_TWALK" }, \
- { P9_RWALK, "P9_RWALK" }, \
- { P9_TOPEN, "P9_TOPEN" }, \
- { P9_ROPEN, "P9_ROPEN" }, \
- { P9_TCREATE, "P9_TCREATE" }, \
- { P9_RCREATE, "P9_RCREATE" }, \
- { P9_TREAD, "P9_TREAD" }, \
- { P9_RREAD, "P9_RREAD" }, \
- { P9_TWRITE, "P9_TWRITE" }, \
- { P9_RWRITE, "P9_RWRITE" }, \
- { P9_TCLUNK, "P9_TCLUNK" }, \
- { P9_RCLUNK, "P9_RCLUNK" }, \
- { P9_TREMOVE, "P9_TREMOVE" }, \
- { P9_RREMOVE, "P9_RREMOVE" }, \
- { P9_TSTAT, "P9_TSTAT" }, \
- { P9_RSTAT, "P9_RSTAT" }, \
- { P9_TWSTAT, "P9_TWSTAT" }, \
- { P9_RWSTAT, "P9_RWSTAT" })
+ __print_symbolic(type, P9_MSG_T)

TRACE_EVENT(9p_client_req,
TP_PROTO(struct p9_client *clnt, int8_t type, int tag),
--
2.1.4



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