utils: add fastpath routine on mkdir_p function

Call 'access' to examine whether 'dir' is already existed or not instead
of directly calling 'mkdir' on each dir name separated by slash '/' even though
'dir' is existed.

Signed-off-by: Leesoo Ahn <lsahn@ooseel.net>

diff --git a/src/lxc/utils.c b/src/lxc/utils.c
index b2cfb865d6b8be248761a110078559cad9917761..4acb10585643097121373f772d9579c3599ff4d0 100644 (file)
--- a/src/lxc/utils.c
+++ b/src/lxc/utils.c
@@ -218,6 +218,9 @@ int mkdir_p(const char *dir, mode_t mode)
        const char *tmp = dir;
        const char *orig = dir;
 
+       if (access(dir, F_OK) != -1)
+               return 0;
+
        do {
                __do_free char *makeme = NULL;
                int ret;