The QSD API is defined in lustre/include/lustre_quota.h as follows:
struct qsd_instance *qsd_init(const struct lu_env *, char *, struct dt_device *,
The QSD API is defined in lustre/include/lustre_quota.h as follows:
struct qsd_instance *qsd_init(const struct lu_env *, char *, struct dt_device *,
int qsd_prepare(const struct lu_env *, struct qsd_instance *);
int qsd_start(const struct lu_env *, struct qsd_instance *);
void qsd_fini(const struct lu_env *, struct qsd_instance *);
int qsd_prepare(const struct lu_env *, struct qsd_instance *);
int qsd_start(const struct lu_env *, struct qsd_instance *);
void qsd_fini(const struct lu_env *, struct qsd_instance *);