perf trace: Handle DT_UNKNOWN on filesystems that don't support d_type
Some filesystems like xfs and reiserfs will return DT_UNKNOWN for the
d_type. Handle this case by calling stat() to determine the type.
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1290355779-3276-1-git-send-email-sbohrer@rgmadvisors.com>
Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 86cfe38..4783ed8 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -301,17 +301,34 @@
return 0;
}
-#define for_each_lang(scripts_dir, lang_dirent, lang_next) \
+/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
+static int is_directory(const char *base_path, const struct dirent *dent)
+{
+ char path[PATH_MAX];
+ struct stat st;
+
+ sprintf(path, "%s/%s", base_path, dent->d_name);
+ if (stat(path, &st))
+ return 0;
+
+ return S_ISDIR(st.st_mode);
+}
+
+#define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \
lang_next) \
- if (lang_dirent.d_type == DT_DIR && \
+ if ((lang_dirent.d_type == DT_DIR || \
+ (lang_dirent.d_type == DT_UNKNOWN && \
+ is_directory(scripts_path, &lang_dirent))) && \
(strcmp(lang_dirent.d_name, ".")) && \
(strcmp(lang_dirent.d_name, "..")))
-#define for_each_script(lang_dir, script_dirent, script_next) \
+#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
while (!readdir_r(lang_dir, &script_dirent, &script_next) && \
script_next) \
- if (script_dirent.d_type != DT_DIR)
+ if (script_dirent.d_type != DT_DIR && \
+ (script_dirent.d_type != DT_UNKNOWN || \
+ !is_directory(lang_path, &script_dirent)))
#define RECORD_SUFFIX "-record"
@@ -466,14 +483,14 @@
if (!scripts_dir)
return -1;
- for_each_lang(scripts_dir, lang_dirent, lang_next) {
+ for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
lang_dirent.d_name);
lang_dir = opendir(lang_path);
if (!lang_dir)
continue;
- for_each_script(lang_dir, script_dirent, script_next) {
+ for_each_script(lang_path, lang_dir, script_dirent, script_next) {
script_root = strdup(script_dirent.d_name);
str = ends_with(script_root, REPORT_SUFFIX);
if (str) {
@@ -514,14 +531,14 @@
if (!scripts_dir)
return NULL;
- for_each_lang(scripts_dir, lang_dirent, lang_next) {
+ for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
lang_dirent.d_name);
lang_dir = opendir(lang_path);
if (!lang_dir)
continue;
- for_each_script(lang_dir, script_dirent, script_next) {
+ for_each_script(lang_path, lang_dir, script_dirent, script_next) {
__script_root = strdup(script_dirent.d_name);
str = ends_with(__script_root, suffix);
if (str) {