perf trace beauty: Export function to get the files for a thread

So that beautifiers can access things like dev_maj.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-wm5o51f206c5pi063dsaeraq@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-trace.c

@@ -958,11 +958,6 @@ static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
 	return printed + fprintf(fp, "): ");
 }
 
-struct file {
-	char *pathname;
-	int  dev_maj;
-};
-
 /**
  * filename.ptr: The filename char pointer that will be vfs_getname'd
  * filename.entry_str_pos: Where to insert the string translated from
@@ -1064,6 +1059,11 @@ static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int f
 	return ttrace->files.table + fd;
 }
 
+struct file *thread__files_entry(struct thread *thread, int fd)
+{
+	return thread_trace__files_entry(thread__priv(thread), fd);
+}
+
 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
 {
 	struct thread_trace *ttrace = thread__priv(thread);

tools/perf/trace/beauty/beauty.h

@@ -32,6 +32,13 @@ size_t strarray__scnprintf_flags(struct strarray *sa, char *bf, size_t size, boo
 struct trace;
 struct thread;
 
+struct file {
+	char *pathname;
+	int  dev_maj;
+};
+
+struct file *thread__files_entry(struct thread *thread, int fd);
+
 struct strarrays {
 	int		nr_entries;
 	struct strarray **entries;