[PATCH v3 05/16] ovl: use an auxiliary var for overlay root entry

Amir Goldstein
2017-04-26T21:35:07Z

fs/overlayfs/namei.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index d660177..17f9372 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -220,6 +220,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
const struct cred *old_cred;
struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
struct ovl_entry *poe = dentry->d_parent->d_fsdata;
+ struct ovl_entry *roe = dentry->d_sb->s_root->d_fsdata;
struct path *stack = NULL;
struct dentry *upperdir, *upperdentry = NULL;
unsigned int ctr = 0;
@@ -259,7 +260,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
if (!upperredirect)
goto out_put_upper;
if (d.redirect[0] == '/')
- poe = dentry->d_sb->s_root->d_fsdata;
+ poe = roe;
}
if (d.opaque)
type |= __OVL_PATH_OPAQUE;
@@ -291,10 +292,8 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
if (d.stop)
break;

- if (d.redirect &&
- d.redirect[0] == '/' &&
- poe != dentry->d_sb->s_root->d_fsdata) {
- poe = dentry->d_sb->s_root->d_fsdata;
+ if (d.redirect && d.redirect[0] == '/' && poe != roe) {
+ poe = roe;

/* Find the current layer on the root dentry */
for (i = 0; i < poe->numlower; i++)
--
2.7.4