ovl: use vfs_get_link()

[cascardo/linux.git] / fs / overlayfs / inode.c

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index ce5d7df..bc6d261 100644 (file)
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -156,45 +156,18 @@ static const char *ovl_get_link(struct dentry *dentry,
                                struct inode *inode,
                                struct delayed_call *done)
 {
-       struct dentry *realdentry;
-       struct inode *realinode;
        const struct cred *old_cred;
        const char *p;
 
        if (!dentry)
                return ERR_PTR(-ECHILD);
 
-       realdentry = ovl_dentry_real(dentry);
-       realinode = realdentry->d_inode;
-
-       if (WARN_ON(!realinode->i_op->get_link))
-               return ERR_PTR(-EPERM);
-
        old_cred = ovl_override_creds(dentry->d_sb);
-       p = realinode->i_op->get_link(realdentry, realinode, done);
+       p = vfs_get_link(ovl_dentry_real(dentry), done);
        revert_creds(old_cred);
        return p;
 }
 
-static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
-{
-       struct path realpath;
-       struct inode *realinode;
-       const struct cred *old_cred;
-       int err;
-
-       ovl_path_real(dentry, &realpath);
-       realinode = realpath.dentry->d_inode;
-
-       if (!realinode->i_op->readlink)
-               return -EINVAL;
-
-       old_cred = ovl_override_creds(dentry->d_sb);
-       err = realinode->i_op->readlink(realpath.dentry, buf, bufsiz);
-       revert_creds(old_cred);
-       return err;
-}
-
 bool ovl_is_private_xattr(const char *name)
 {
        return strncmp(name, OVL_XATTR_PREFIX,
@@ -381,7 +354,7 @@ static const struct inode_operations ovl_file_inode_operations = {
 static const struct inode_operations ovl_symlink_inode_operations = {
        .setattr        = ovl_setattr,
        .get_link       = ovl_get_link,
-       .readlink       = ovl_readlink,
+       .readlink       = generic_readlink,
        .getattr        = ovl_getattr,
        .setxattr       = generic_setxattr,
        .getxattr       = generic_getxattr,