Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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>