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
10 enum perf_data_mode {
11 PERF_DATA_MODE_WRITE,
12 PERF_DATA_MODE_READ,
13 };
14
15 enum perf_dir_version {
16 PERF_DIR_SINGLE_FILE = 0,
17 PERF_DIR_VERSION = 1,
18 };
19
20 struct perf_data_file {
21 char *path;
22 union {
23 int fd;
24 FILE *fptr;
25 };
26 unsigned long size;
27 };
28
29 struct 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
perf_data__is_read(struct perf_data * data)46 static inline bool perf_data__is_read(struct perf_data *data)
47 {
48 return data->mode == PERF_DATA_MODE_READ;
49 }
50
perf_data__is_write(struct perf_data * data)51 static inline bool perf_data__is_write(struct perf_data *data)
52 {
53 return data->mode == PERF_DATA_MODE_WRITE;
54 }
55
perf_data__is_pipe(struct perf_data * data)56 static inline int perf_data__is_pipe(struct perf_data *data)
57 {
58 return data->is_pipe;
59 }
60
perf_data__is_dir(struct perf_data * data)61 static inline bool perf_data__is_dir(struct perf_data *data)
62 {
63 return data->is_dir;
64 }
65
perf_data__is_single_file(struct perf_data * data)66 static inline bool perf_data__is_single_file(struct perf_data *data)
67 {
68 return data->dir.version == PERF_DIR_SINGLE_FILE;
69 }
70
perf_data__fd(struct perf_data * data)71 static 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
79 int perf_data__open(struct perf_data *data);
80 void perf_data__close(struct perf_data *data);
81 ssize_t perf_data__read(struct perf_data *data, void *buf, size_t size);
82 ssize_t perf_data__write(struct perf_data *data,
83 void *buf, size_t size);
84 ssize_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 */
93 int perf_data__switch(struct perf_data *data,
94 const char *postfix,
95 size_t pos, bool at_exit, char **new_filepath);
96
97 int perf_data__create_dir(struct perf_data *data, int nr);
98 int perf_data__open_dir(struct perf_data *data);
99 void perf_data__close_dir(struct perf_data *data);
100 int perf_data__update_dir(struct perf_data *data);
101 unsigned long perf_data__size(struct perf_data *data);
102 int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz);
103 bool has_kcore_dir(const char *path);
104 char *perf_data__kallsyms_name(struct perf_data *data);
105 char *perf_data__guest_kallsyms_name(struct perf_data *data, pid_t machine_pid);
106 bool is_perf_data(const char *path);
107 #endif /* __PERF_DATA_H */
108