From: Vivek Goyal Date: Fri, 9 Mar 2018 20:44:43 +0000 (-0500) Subject: ovl: set d->is_dir and d->opaque for last path element X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=102b0d11cbe83e607a8e9060c05930905332f9ec;p=openwrt%2Fstaging%2Fblogic.git ovl: set d->is_dir and d->opaque for last path element Certain properties in ovl_lookup_data should be set only for the last element of the path. IOW, if we are calling ovl_lookup_single() for an absolute redirect, then d->is_dir and d->opaque do not make much sense for intermediate path elements. Instead set them only if dentry being lookup is last path element. As of now we do not seem to be making use of d->opaque if it is set for a path/dentry in lower. But just define the semantics so that future code can make use of this assumption. Signed-off-by: Vivek Goyal Signed-off-by: Miklos Szeredi --- diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index 5287c4bcf14b..0a26b76590d5 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -230,6 +230,7 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, { struct dentry *this; int err; + bool last_element = !post[0]; this = lookup_one_len_unlocked(name, base, namelen); if (IS_ERR(this)) { @@ -257,12 +258,15 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, goto put_and_out; goto out; } - d->is_dir = true; + if (last_element) + d->is_dir = true; if (d->last) goto out; if (ovl_is_opaquedir(this)) { - d->stop = d->opaque = true; + d->stop = true; + if (last_element) + d->opaque = true; goto out; } err = ovl_check_redirect(this, d, prelen, post);