1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_DATA_H
3#define __PERF_DATA_H
4
5#include <stdio.h>
6#include <stdbool.h>
7#include <unistd.h>
8#include <linux/types.h>
9
10enum perf_data_mode {
11	PERF_DATA_MODE_WRITE,
12	PERF_DATA_MODE_READ,
13};
14
15enum perf_dir_version {
16	PERF_DIR_SINGLE_FILE	= 0,
17	PERF_DIR_VERSION	= 1,
18};
19
20struct perf_data_file {
21	char		*path;
22	union {
23		int	 fd;
24		FILE	*fptr;
25	};
26	unsigned long	 size;
27};
28
29struct perf_data {
30	const char		*path;
31	struct perf_data_file	 file;
32	bool			 is_pipe;
33	bool			 is_dir;
34	bool			 force;
35	bool			 use_stdio;
36	bool			 in_place_update;
37	enum perf_data_mode	 mode;
38
39	struct {
40		u64			 version;
41		struct perf_data_file	*files;
42		int			 nr;
43	} dir;
44};
45
46static inline bool perf_data__is_read(struct perf_data *data)
47{
48	return data->mode == PERF_DATA_MODE_READ;
49}
50
51static inline bool perf_data__is_write(struct perf_data *data)
52{
53	return data->mode == PERF_DATA_MODE_WRITE;
54}
55
56static inline int perf_data__is_pipe(struct perf_data *data)
57{
58	return data->is_pipe;
59}
60
61static inline bool perf_data__is_dir(struct perf_data *data)
62{
63	return data->is_dir;
64}
65
66static inline bool perf_data__is_single_file(struct perf_data *data)
67{
68	return data->dir.version == PERF_DIR_SINGLE_FILE;
69}
70
71static inline int perf_data__fd(struct perf_data *data)
72{
73	if (data->use_stdio)
74		return fileno(data->file.fptr);
75
76	return data->file.fd;
77}
78
79int perf_data__open(struct perf_data *data);
80void perf_data__close(struct perf_data *data);
81ssize_t perf_data__read(struct perf_data *data, void *buf, size_t size);
82ssize_t perf_data__write(struct perf_data *data,
83			 void *buf, size_t size);
84ssize_t perf_data_file__write(struct perf_data_file *file,
85			      void *buf, size_t size);
86/*
87 * If at_exit is set, only rename current perf.data to
88 * perf.data.<postfix>, continue write on original data.
89 * Set at_exit when flushing the last output.
90 *
91 * Return value is fd of new output.
92 */
93int perf_data__switch(struct perf_data *data,
94		      const char *postfix,
95		      size_t pos, bool at_exit, char **new_filepath);
96
97int perf_data__create_dir(struct perf_data *data, int nr);
98int perf_data__open_dir(struct perf_data *data);
99void perf_data__close_dir(struct perf_data *data);
100int perf_data__update_dir(struct perf_data *data);
101unsigned long perf_data__size(struct perf_data *data);
102int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz);
103bool has_kcore_dir(const char *path);
104char *perf_data__kallsyms_name(struct perf_data *data);
105char *perf_data__guest_kallsyms_name(struct perf_data *data, pid_t machine_pid);
106bool is_perf_data(const char *path);
107#endif /* __PERF_DATA_H */
108