Lookup a file path relative to a dentry-vfsmount pair
int vfs_path_lookup(struct dentry * dentry, struct vfsmount * mnt, const char * name, unsigned int flags, struct path * path);
dentry
pointer to dentry of the base directory
mnt
pointer to vfs mount of the base directory
name
pointer to file name
flags
lookup flags
path
pointer to struct path to fill