diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index 69f4f19659fc53ef6d73399e37aa4fa272720271..a38db76cbccd8efcdf2184d1a262caef310c733f 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -572,18 +572,6 @@ int ovl_path_next(int idx, struct dentry *dentry, struct path *path) return (idx < oe->numlower) ? idx + 1 : -1; } -static int ovl_find_layer(struct ovl_fs *ofs, struct ovl_path *path) -{ - int i; - - for (i = 0; i < ofs->numlower; i++) { - if (ofs->lower_layers[i].mnt == path->layer->mnt) - break; - } - - return i; -} - /* Fix missing 'origin' xattr */ static int ovl_fix_origin(struct dentry *dentry, struct dentry *lower, struct dentry *upper) @@ -733,11 +721,8 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, if (d.redirect && d.redirect[0] == '/' && poe != roe) { poe = roe; - /* Find the current layer on the root dentry */ - i = ovl_find_layer(ofs, &lower); - if (WARN_ON(i == ofs->numlower)) - break; + i = lower.layer->idx - 1; } } diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 9d0bc03bf6e4563ef280fe5e8f695cc9f1e8abd5..608e487550708cec32e7a8ea4fe9b743351ab50c 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -22,6 +22,8 @@ struct ovl_config { struct ovl_layer { struct vfsmount *mnt; dev_t pseudo_dev; + /* Index of this layer in fs root (upper == 0) */ + int idx; }; struct ovl_path { diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 9aa5d32af427fbf87354d4aabfeb1197e70f03ec..b34a002ab4b57dd2463f0db1e20bbba91d1a0808 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1106,6 +1106,7 @@ static int ovl_get_lower_layers(struct ovl_fs *ofs, struct path *stack, ofs->lower_layers[ofs->numlower].mnt = mnt; ofs->lower_layers[ofs->numlower].pseudo_dev = dev; + ofs->lower_layers[ofs->numlower].idx = i + 1; ofs->numlower++; /* Check if all lower layers are on same sb */