tools/perf/util/data.h

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