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