p9_client_attach
fid = p9_client_attach(v9ses->clnt, NULL, uname, uid,
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, INVALID_UID,
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
EXPORT_SYMBOL(p9_client_attach);