perf data: Add perf_data__open_dir_data function

Add perf_data__open_dir_data to open files inside 'struct perf_data'
path directory:

   static int perf_data__open_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/20190224190656.30163-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index 005b3909d1dc..7bd5ddeb7a41 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -8,6 +8,8 @@
 #include <unistd.h>
 #include <string.h>
 #include <asm/bug.h>
+#include <sys/types.h>
+#include <dirent.h>
 
 #include "data.h"
 #include "util.h"
@@ -59,6 +61,63 @@ out_err:
         return ret;
 }
 
+int perf_data__open_dir(struct perf_data *data)
+{
+        struct perf_data_file *files = NULL;
+        struct dirent *dent;
+        int ret = -1;
+        DIR *dir;
+        int nr = 0;
+
+        dir = opendir(data->path);
+        if (!dir)
+                return -EINVAL;
+
+        while ((dent = readdir(dir)) != NULL) {
+                struct perf_data_file *file;
+                char path[PATH_MAX];
+                struct stat st;
+
+                snprintf(path, sizeof(path), "%s/%s", data->path, dent->d_name);
+                if (stat(path, &st))
+                        continue;
+
+                if (!S_ISREG(st.st_mode) || strncmp(dent->d_name, "data", 4))
+                        continue;
+
+                ret = -ENOMEM;
+
+                file = realloc(files, (nr + 1) * sizeof(*files));
+                if (!file)
+                        goto out_err;
+
+                files = file;
+                file = &files[nr++];
+
+                file->path = strdup(path);
+                if (!file->path)
+                        goto out_err;
+
+                ret = open(file->path, O_RDONLY);
+                if (ret < 0)
+                        goto out_err;
+
+                file->fd = ret;
+                file->size = st.st_size;
+        }
+
+        if (!files)
+                return -EINVAL;
+
+        data->dir.files = files;
+        data->dir.nr    = nr;
+        return 0;
+
+out_err:
+        close_dir(files, nr);
+        return ret;
+}
+
 static bool check_pipe(struct perf_data *data)
 {
         struct stat st;