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perf data: Add perf_data__(create_dir|close_dir) functions

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Add perf_data__create_dir() to create nr files inside 'struct perf_data'
path directory:

  int perf_data__create_dir(struct perf_data *data, int nr);

and function to close that data:

  void perf_data__close_dir(struct perf_data *data);

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-02-24 20:06:44 +01:00 committed by Arnaldo Carvalho de Melo
parent ccb7a71dce
commit 1455206311
2 changed files with 55 additions and 0 deletions
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47
tools/perf/util/data.c
View File

@ -7,11 +7,58 @@
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <asm/bug.h>
#include "data.h"
#include "util.h"
#include "debug.h"
static void close_dir(struct perf_data_file *files, int nr)
{
while (--nr >= 1) {
close(files[nr].fd);
free(files[nr].path);
}
free(files);
}
void perf_data__close_dir(struct perf_data *data)
{
close_dir(data->dir.files, data->dir.nr);
}
int perf_data__create_dir(struct perf_data *data, int nr)
{
struct perf_data_file *files = NULL;
int i, ret = -1;
files = zalloc(nr * sizeof(*files));
if (!files)
return -ENOMEM;
data->dir.files = files;
data->dir.nr = nr;
for (i = 0; i < nr; i++) {
struct perf_data_file *file = &files[i];
if (asprintf(&file->path, "%s/data.%d", data->path, i) < 0)
goto out_err;
ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
if (ret < 0)
goto out_err;
file->fd = ret;
}
return 0;
out_err:
close_dir(files, i);
return ret;
}
static bool check_pipe(struct perf_data *data)
{
struct stat st;

8
tools/perf/util/data.h
View File

@ -21,6 +21,11 @@ struct perf_data {
bool is_pipe;
bool force;
enum perf_data_mode mode;
struct {
struct perf_data_file *files;
int nr;
} dir;
};
static inline bool perf_data__is_read(struct perf_data *data)
@ -64,4 +69,7 @@ ssize_t perf_data_file__write(struct perf_data_file *file,
int perf_data__switch(struct perf_data *data,
const char *postfix,
size_t pos, bool at_exit);
int perf_data__create_dir(struct perf_data *data, int nr);
void perf_data__close_dir(struct perf_data *data);
#endif /* __PERF_DATA_H */