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		__field(enum req_op, op)
40		__field(unsigned int, zone_no)
41		__field(unsigned int, zone_cond)
42	    ),
43	    TP_fast_assign(
44		__entry->op = req_op(blk_mq_rq_from_pdu(cmd));
45		__entry->zone_no = zone_no;
46		__entry->zone_cond = zone_cond;
47		__assign_disk_name(__entry->disk,
48			blk_mq_rq_from_pdu(cmd)->q->disk);
49	    ),
50	    TP_printk("%s req=%-15s zone_no=%u zone_cond=%-10s",
51		      __print_disk_name(__entry->disk),
52		      blk_op_str(__entry->op),
53		      __entry->zone_no,
54		      blk_zone_cond_str(__entry->zone_cond))
55);
56
57TRACE_EVENT(nullb_report_zones,
58	    TP_PROTO(struct nullb *nullb, unsigned int nr_zones),
59	    TP_ARGS(nullb, nr_zones),
60	    TP_STRUCT__entry(
61		__array(char, disk, DISK_NAME_LEN)
62		__field(unsigned int, nr_zones)
63	    ),
64	    TP_fast_assign(
65		__entry->nr_zones = nr_zones;
66		__assign_disk_name(__entry->disk, nullb->disk);
67	    ),
68	    TP_printk("%s nr_zones=%u",
69		      __print_disk_name(__entry->disk), __entry->nr_zones)
70);
71
72#endif /* _TRACE_NULLB_H */
73
74#undef TRACE_INCLUDE_PATH
75#define TRACE_INCLUDE_PATH .
76#undef TRACE_INCLUDE_FILE
77#define TRACE_INCLUDE_FILE trace
78
79/* This part must be outside protection */
80#include <trace/define_trace.h>
81