From 8620c238edbf373aafcc4ee129e76c8e794c5214 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 4 May 2015 08:58:35 -0400 Subject: [PATCH] link_path_walk: move the OK: inside the loop fewer labels that way; in particular, resuming after the end of nested symlink is straight-line. Signed-off-by: Al Viro --- fs/namei.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index 31da71753d7b..19e5c8a27ea4 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1806,11 +1806,21 @@ static int link_path_walk(const char *name, struct nameidata *nd) do { name++; } while (unlikely(*name == '/')); - if (!*name) - goto OK; - - err = walk_component(nd, LOOKUP_FOLLOW); -Walked: + if (unlikely(!*name)) { +OK: + /* called from path_init(), done */ + if (!nd->depth) + return 0; + name = nd->stack[nd->depth - 1].name; + /* called from trailing_symlink(), done */ + if (!name) + return 0; + /* last component of nested symlink */ + err = walk_component(nd, LOOKUP_FOLLOW); + put_link(nd); + } else { + err = walk_component(nd, LOOKUP_FOLLOW); + } if (err < 0) break; @@ -1859,16 +1869,6 @@ Walked: } terminate_walk(nd); return err; -OK: - if (!nd->depth) /* called from path_init(), done */ - return 0; - name = nd->stack[nd->depth - 1].name; - if (!name) /* called from trailing_symlink(), done */ - return 0; - - err = walk_component(nd, LOOKUP_FOLLOW); - put_link(nd); - goto Walked; } static int path_init(int dfd, const struct filename *name, unsigned int flags,