| From | Al Viro <> | Subject | [PATCH v3 060/110] link_path_walk: nd->depth massage, part 9 | Date | Mon, 11 May 2015 19:07:20 +0100 |
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From: Al Viro <viro@zeniv.linux.org.uk>
Make link_path_walk() work with any value of nd->depth on entry - memorize it and use it in tests instead of comparing with 1. Don't bother with increment/decrement in path_init().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- fs/namei.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c index 1f61955..bc6d67e 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1759,6 +1759,7 @@ static inline u64 hash_name(const char *name) static int link_path_walk(const char *name, struct nameidata *nd) { int err; + int orig_depth = nd->depth; while (*name=='/') name++; @@ -1867,11 +1868,11 @@ Walked: } terminate_walk(nd); Err: - while (unlikely(nd->depth > 1)) + while (unlikely(nd->depth > orig_depth)) put_link(nd); return err; OK: - if (unlikely(nd->depth > 1)) { + if (unlikely(nd->depth > orig_depth)) { name = nd->stack[nd->depth - 1].name; err = walk_component(nd, LOOKUP_FOLLOW); put_link(nd); @@ -1979,10 +1980,7 @@ static int path_init(int dfd, const struct filename *name, unsigned int flags, return -ECHILD; done: current->total_link_count = 0; - nd->depth++; - retval = link_path_walk(s, nd); - nd->depth--; - return retval; + return link_path_walk(s, nd); } static void path_cleanup(struct nameidata *nd) -- 2.1.4
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