centos man page for d_lookup

D_LOOKUP(9)							   The Linux VFS						       D_LOOKUP(9)

NAME
       d_lookup - search for a dentry

SYNOPSIS
       struct dentry * d_lookup(const struct dentry * parent, const struct qstr * name);

ARGUMENTS
       parent
	   parent dentry

       name
	   qstr of name we wish to find

RETURNS
       dentry, or NULL

       d_lookup searches the children of the parent dentry for the name in question. If the dentry is found its reference count is incremented and
       the dentry is returned. The caller must use dput to free the entry when it has finished using it.  NULL is returned if the dentry does not
       exist.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							       D_LOOKUP(9)