linux/include/trace/events/9p.h

/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM …

#if !defined(_TRACE_9P_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_9P_H

#include <linux/tracepoint.h>

#define P9_MSG_T …


#define P9_FID_REFTYPE …

/* Define EM() to export the enums to userspace via TRACE_DEFINE_ENUM() */
#undef EM
#undef EMe
#define EM(a, b) …
#define EMe(a, b) …

P9_MSG_T
P9_FID_REFTYPE

/* And also use EM/EMe to define helper enums -- once */
#ifndef __9P_DECLARE_TRACE_ENUMS_ONLY_ONCE
#define __9P_DECLARE_TRACE_ENUMS_ONLY_ONCE
#undef EM
#undef EMe
#define EM(a, b) …
#define EMe(a, b) …

enum p9_fid_reftype { … } __mode(…);

#endif

/*
 * 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) …
#define EMe(a, b) …

#define show_9p_op(type) …
#define show_9p_fid_reftype(type) …

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

	    TP_ARGS(clnt, type, tag),

	    TP_STRUCT__entry(
		    __field(    void *,		clnt			     )
		    __field(	__u8,		type			     )
		    __field(	__u32,		tag			     )
		    ),

	    TP_fast_assign(
		    __entry->clnt    =  clnt;
		    __entry->type    =  type;
		    __entry->tag     =  tag;
		    ),

	    TP_printk("client %lu request %s tag  %d",
		    (long)__entry->clnt, show_9p_op(__entry->type),
		    __entry->tag)
 );

TRACE_EVENT(9p_client_res,
	    TP_PROTO(struct p9_client *clnt, int8_t type, int tag, int err),

	    TP_ARGS(clnt, type, tag, err),

	    TP_STRUCT__entry(
		    __field(    void *,		clnt			     )
		    __field(	__u8,		type			     )
		    __field(	__u32,		tag			     )
		    __field(	__u32,		err			     )
		    ),

	    TP_fast_assign(
		    __entry->clnt    =  clnt;
		    __entry->type    =  type;
		    __entry->tag     =  tag;
		    __entry->err     =  err;
		    ),

	    TP_printk("client %lu response %s tag  %d err %d",
		      (long)__entry->clnt, show_9p_op(__entry->type),
		      __entry->tag, __entry->err)
);

/* dump 32 bytes of protocol data */
#define P9_PROTO_DUMP_SZ …
TRACE_EVENT(9p_protocol_dump,
	    TP_PROTO(struct p9_client *clnt, struct p9_fcall *pdu),

	    TP_ARGS(clnt, pdu),

	    TP_STRUCT__entry(
		    __field(	void *,		clnt				)
		    __field(	__u8,		type				)
		    __field(	__u16,		tag				)
		    __dynamic_array(unsigned char, line,
				min_t(size_t, pdu->capacity, P9_PROTO_DUMP_SZ))
		    ),

	    TP_fast_assign(
		    __entry->clnt   =  clnt;
		    __entry->type   =  pdu->id;
		    __entry->tag    =  pdu->tag;
		    memcpy(__get_dynamic_array(line), pdu->sdata,
				__get_dynamic_array_len(line));
		    ),
	    TP_printk("clnt %lu %s(tag = %d)\n%*ph\n",
		      (unsigned long)__entry->clnt, show_9p_op(__entry->type),
		      __entry->tag, __get_dynamic_array_len(line),
		      __get_dynamic_array(line))
 );


TRACE_EVENT(9p_fid_ref,
	    TP_PROTO(struct p9_fid *fid, __u8 type),

	    TP_ARGS(fid, type),

	    TP_STRUCT__entry(
		    __field(	int,	fid		)
		    __field(	int,	refcount	)
		    __field(	__u8, type	)
		    ),

	    TP_fast_assign(
		    __entry->fid = fid->fid;
		    __entry->refcount = refcount_read(&fid->count);
		    __entry->type = type;
		    ),

	    TP_printk("%s fid %d, refcount %d",
		      show_9p_fid_reftype(__entry->type),
		      __entry->fid, __entry->refcount)
);


#endif /* _TRACE_9P_H */

/* This part must be outside protection */
#include <trace/define_trace.h>