trace.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * null_blk device driver tracepoints.
 4 *
 5 * Copyright (C) 2020 Western Digital Corporation or its affiliates.
 6 */
 7
 8#undef TRACE_SYSTEM
 9#define TRACE_SYSTEM nullb
10
11#if !defined(_TRACE_NULLB_H) || defined(TRACE_HEADER_MULTI_READ)
12#define _TRACE_NULLB_H
13
14#include <linux/tracepoint.h>
15#include <linux/trace_seq.h>
16
17#include "null_blk.h"
18
19const char *nullb_trace_disk_name(struct trace_seq *p, char *name);
20
21#define __print_disk_name(name) nullb_trace_disk_name(p, name)
22
23#ifndef TRACE_HEADER_MULTI_READ
24static inline void __assign_disk_name(char *name, struct gendisk *disk)
25{
26	if (disk)
27		memcpy(name, disk->disk_name, DISK_NAME_LEN);
28	else
29		memset(name, 0, DISK_NAME_LEN);
30}
31#endif
32
33TRACE_EVENT(nullb_zone_op,
34	    TP_PROTO(struct nullb_cmd *cmd, unsigned int zone_no,
35		     unsigned int zone_cond),
36	    TP_ARGS(cmd, zone_no, zone_cond),
37	    TP_STRUCT__entry(
38		__array(char, disk, DISK_NAME_LEN)
39		/*
40		 * __field() uses is_signed_type(). is_signed_type() does not
41		 * support bitwise types. Use __field_struct() instead because
42		 * it does not use is_signed_type().
43		 */
44		__field_struct(enum req_op, op)
45		__field(unsigned int, zone_no)
46		__field(unsigned int, zone_cond)
47	    ),
48	    TP_fast_assign(
49		__entry->op = req_op(blk_mq_rq_from_pdu(cmd));
50		__entry->zone_no = zone_no;
51		__entry->zone_cond = zone_cond;
52		__assign_disk_name(__entry->disk,
53			blk_mq_rq_from_pdu(cmd)->q->disk);
54	    ),
55	    TP_printk("%s req=%-15s zone_no=%u zone_cond=%-10s",
56		      __print_disk_name(__entry->disk),
57		      blk_op_str(__entry->op),
58		      __entry->zone_no,
59		      blk_zone_cond_str(__entry->zone_cond))
60);
61
62TRACE_EVENT(nullb_report_zones,
63	    TP_PROTO(struct nullb *nullb, unsigned int nr_zones),
64	    TP_ARGS(nullb, nr_zones),
65	    TP_STRUCT__entry(
66		__array(char, disk, DISK_NAME_LEN)
67		__field(unsigned int, nr_zones)
68	    ),
69	    TP_fast_assign(
70		__entry->nr_zones = nr_zones;
71		__assign_disk_name(__entry->disk, nullb->disk);
72	    ),
73	    TP_printk("%s nr_zones=%u",
74		      __print_disk_name(__entry->disk), __entry->nr_zones)
75);
76
77#endif /* _TRACE_NULLB_H */
78
79#undef TRACE_INCLUDE_PATH
80#define TRACE_INCLUDE_PATH .
81#undef TRACE_INCLUDE_FILE
82#define TRACE_INCLUDE_FILE trace
83
84/* This part must be outside protection */
85#include <trace/define_trace.h>