gfs2_quota_check
error = gfs2_quota_check(ip, nuid, ngid, &ap);
int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);