xref: /kernel/linux/linux-5.10/tools/perf/util/data.h (revision 8c2ecf20) 
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_DATA_H
3#define __PERF_DATA_H
4
5#include <stdbool.h>
6#include <linux/types.h>
7
8enum perf_data_mode {
9	PERF_DATA_MODE_WRITE,
10	PERF_DATA_MODE_READ,
11};
12
13enum perf_dir_version {
14	PERF_DIR_SINGLE_FILE	= 0,
15	PERF_DIR_VERSION	= 1,
16};
17
18struct perf_data_file {
19	char		*path;
20	int		 fd;
21	unsigned long	 size;
22};
23
24struct perf_data {
25	const char		*path;
26	struct perf_data_file	 file;
27	bool			 is_pipe;
28	bool			 is_dir;
29	bool			 force;
30	enum perf_data_mode	 mode;
31
32	struct {
33		u64			 version;
34		struct perf_data_file	*files;
35		int			 nr;
36	} dir;
37};
38
39static inline bool perf_data__is_read(struct perf_data *data)
40{
41	return data->mode == PERF_DATA_MODE_READ;
42}
43
44static inline bool perf_data__is_write(struct perf_data *data)
45{
46	return data->mode == PERF_DATA_MODE_WRITE;
47}
48
49static inline int perf_data__is_pipe(struct perf_data *data)
50{
51	return data->is_pipe;
52}
53
54static inline bool perf_data__is_dir(struct perf_data *data)
55{
56	return data->is_dir;
57}
58
59static inline bool perf_data__is_single_file(struct perf_data *data)
60{
61	return data->dir.version == PERF_DIR_SINGLE_FILE;
62}
63
64static inline int perf_data__fd(struct perf_data *data)
65{
66	return data->file.fd;
67}
68
69int perf_data__open(struct perf_data *data);
70void perf_data__close(struct perf_data *data);
71ssize_t perf_data__write(struct perf_data *data,
72			      void *buf, size_t size);
73ssize_t perf_data_file__write(struct perf_data_file *file,
74			      void *buf, size_t size);
75/*
76 * If at_exit is set, only rename current perf.data to
77 * perf.data.<postfix>, continue write on original data.
78 * Set at_exit when flushing the last output.
79 *
80 * Return value is fd of new output.
81 */
82int perf_data__switch(struct perf_data *data,
83			   const char *postfix,
84			   size_t pos, bool at_exit, char **new_filepath);
85
86int perf_data__create_dir(struct perf_data *data, int nr);
87int perf_data__open_dir(struct perf_data *data);
88void perf_data__close_dir(struct perf_data *data);
89int perf_data__update_dir(struct perf_data *data);
90unsigned long perf_data__size(struct perf_data *data);
91int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz);
92char *perf_data__kallsyms_name(struct perf_data *data);
93#endif /* __PERF_DATA_H */
94