/*
* Glimpse callback handler for global quota lock.
*
* \param lock - is the lock targeted by the glimpse
* \param data - is a pointer to the glimpse ptlrpc request
*/
static int qsd_glb_glimpse_ast(struct ldlm_lock *lock, void *data)
{
struct ptlrpc_request *req = data;
struct qsd_qtype_info *qqi;
struct ldlm_gl_lquota_desc *desc;
struct lquota_lvb *lvb;
struct lquota_glb_rec rec;
int rc;
ENTRY;
rc = qsd_common_glimpse_ast(req, &desc, (void **)&lvb);
if (rc)
GOTO(out, rc);
qqi = qsd_glb_ast_data_get(lock, false);
if (qqi == NULL)
/* valid race */
GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
CDEBUG(D_QUOTA, "%s: glimpse on glb quota locks, id:"LPU64" ver:"LPU64
" hard:" LPU64" soft:"LPU64"\n", qqi->qqi_qsd->qsd_svname,
desc->gl_id.qid_uid, desc->gl_ver, desc->gl_hardlimit,
desc->gl_softlimit);
if (desc->gl_ver == 0) {
CERROR("%s: invalid global index version "LPU64"\n",
qqi->qqi_qsd->qsd_svname, desc->gl_ver);
GOTO(out_qqi, rc = -EINVAL);
}
/* extract new hard & soft limits from the glimpse descriptor */
rec.qbr_hardlimit = desc->gl_hardlimit;
rec.qbr_softlimit = desc->gl_softlimit;
rec.qbr_time = desc->gl_time;
rec.qbr_granted = 0;
/* We can't afford disk io in the context of glimpse callback handling
* thread, so the on-disk global limits update has to be deferred. */
qsd_upd_schedule(qqi, NULL, &desc->gl_id, (union lquota_rec *)&rec,
desc->gl_ver, true);
EXIT;
out_qqi:
lu_ref_del(&qqi->qqi_reference, "ast_data_get", lock);
qqi_putref(qqi);
out:
req->rq_status = rc;
return rc;
}
/*
* Glimpse callback handler for per-ID quota locks.
*
* \param lock - is the lock targeted by the glimpse
* \param data - is a pointer to the glimpse ptlrpc request
*/
static int qsd_id_glimpse_ast(struct ldlm_lock *lock, void *data)
{
struct ptlrpc_request *req = data;
struct lquota_entry *lqe;
struct qsd_instance *qsd;
struct ldlm_gl_lquota_desc *desc;
struct lquota_lvb *lvb;
int rc;
bool wakeup = false;
ENTRY;
rc = qsd_common_glimpse_ast(req, &desc, (void **)&lvb);
if (rc)
GOTO(out, rc);
lqe = qsd_id_ast_data_get(lock, false);
if (lqe == NULL)
/* valid race */
GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
LQUOTA_DEBUG(lqe, "glimpse on quota locks, new qunit:"LPU64,
desc->gl_qunit);
qsd = lqe2qqi(lqe)->qqi_qsd;
lqe_write_lock(lqe);
lvb->lvb_id_rel = 0;
if (desc->gl_qunit != 0 && desc->gl_qunit != lqe->lqe_qunit) {
long long space;
/* extract new qunit from glimpse request */
qsd_set_qunit(lqe, desc->gl_qunit);
space = lqe->lqe_granted - lqe->lqe_pending_rel;
space -= lqe->lqe_usage;
space -= lqe->lqe_pending_write + lqe->lqe_waiting_write;
space -= lqe->lqe_qunit;
if (space > 0) {
if (lqe->lqe_pending_req > 0) {
LQUOTA_DEBUG(lqe, "request in flight, postpone "
"release of "LPD64, space);
lvb->lvb_id_may_rel = space;
} else {
lqe->lqe_pending_req++;
/* release quota space in glimpse reply */
LQUOTA_DEBUG(lqe, "releasing "LPD64, space);
lqe->lqe_granted -= space;
lvb->lvb_id_rel = space;
lqe_write_unlock(lqe);
/* change the lqe_granted */
qsd_upd_schedule(lqe2qqi(lqe), lqe, &lqe->lqe_id,
(union lquota_rec *)&lqe->lqe_granted,
0, false);
lqe_write_lock(lqe);
lqe->lqe_pending_req--;
wakeup = true;
}
}
}
lqe->lqe_edquot = !!(desc->gl_flags & LQUOTA_FL_EDQUOT);
lqe_write_unlock(lqe);
if (wakeup)
wake_up_all(&lqe->lqe_waiters);
lqe_putref(lqe);
out:
req->rq_status = rc;
RETURN(rc);
}
/**
* Callback function called when an acquire/release request sent to the master
* is completed
*/
static void qsd_req_completion(const struct lu_env *env,
struct qsd_qtype_info *qqi,
struct quota_body *reqbody,
struct quota_body *repbody,
struct lustre_handle *lockh,
struct lquota_lvb *lvb,
void *arg, int ret)
{
struct lquota_entry *lqe = (struct lquota_entry *)arg;
struct qsd_thread_info *qti;
int rc;
bool adjust = false, cancel = false;
ENTRY;
LASSERT(qqi != NULL && lqe != NULL);
/* environment passed by ptlrpcd is mostly used by CLIO and hasn't the
* DT tags set. */
rc = lu_env_refill_by_tags((struct lu_env *)env, LCT_DT_THREAD, 0);
if (rc) {
LQUOTA_ERROR(lqe, "failed to refill environmnent %d", rc);
lqe_write_lock(lqe);
/* can't afford to adjust quota space with no suitable lu_env */
GOTO(out_noadjust, rc);
}
qti = qsd_info(env);
lqe_write_lock(lqe);
LQUOTA_DEBUG(lqe, "DQACQ returned %d, flags:0x%x", ret,
reqbody->qb_flags);
/* despite -EDQUOT & -EINPROGRESS errors, the master might still
* grant us back quota space to adjust quota overrun */
if (ret != 0 && ret != -EDQUOT && ret != -EINPROGRESS) {
if (ret != -ETIMEDOUT && ret != -ENOTCONN &&
ret != -ESHUTDOWN && ret != -EAGAIN)
/* print errors only if return code is unexpected */
LQUOTA_ERROR(lqe, "DQACQ failed with %d, flags:0x%x",
ret, reqbody->qb_flags);
GOTO(out, ret);
}
/* Set the lqe_lockh */
if (lustre_handle_is_used(lockh) &&
!lustre_handle_equal(lockh, &lqe->lqe_lockh))
lustre_handle_copy(&lqe->lqe_lockh, lockh);
/* If the replied qb_count is zero, it means master didn't process
* the DQACQ since the limit for this ID has been removed, so we
* should not update quota entry & slave index copy neither. */
if (repbody != NULL && repbody->qb_count != 0) {
LQUOTA_DEBUG(lqe, "DQACQ qb_count:"LPU64, repbody->qb_count);
if (req_is_rel(reqbody->qb_flags)) {
if (lqe->lqe_granted < repbody->qb_count) {
LQUOTA_ERROR(lqe, "can't release more space "
"than owned "LPU64"<"LPU64,
lqe->lqe_granted,
repbody->qb_count);
lqe->lqe_granted = 0;
} else {
lqe->lqe_granted -= repbody->qb_count;
}
/* Cancel the per-ID lock initiatively when there
* isn't any usage & grant, which can avoid master
* sending glimpse unnecessarily to this slave on
* quota revoking */
if (!lqe->lqe_pending_write && !lqe->lqe_granted &&
!lqe->lqe_waiting_write && !lqe->lqe_usage)
cancel = true;
} else {
lqe->lqe_granted += repbody->qb_count;
}
qti->qti_rec.lqr_slv_rec.qsr_granted = lqe->lqe_granted;
lqe_write_unlock(lqe);
/* Update the slave index file in the dedicated thread. So far,
* We don't update the version of slave index copy on DQACQ.
* No locking is necessary since nobody can change
* lqe->lqe_granted while lqe->lqe_pending_req > 0 */
qsd_upd_schedule(qqi, lqe, &lqe->lqe_id, &qti->qti_rec, 0,
false);
lqe_write_lock(lqe);
}
/* extract information from lvb */
if (ret == 0 && lvb != 0) {
if (lvb->lvb_id_qunit != 0)
qsd_set_qunit(lqe, lvb->lvb_id_qunit);
qsd_set_edquot(lqe, !!(lvb->lvb_flags & LQUOTA_FL_EDQUOT));
} else if (repbody != NULL && repbody->qb_qunit != 0) {
qsd_set_qunit(lqe, repbody->qb_qunit);
}
/* turn off pre-acquire if it failed with -EDQUOT. This is done to avoid
* flooding the master with acquire request. Pre-acquire will be turned
* on again as soon as qunit is modified */
if (req_is_preacq(reqbody->qb_flags) && ret == -EDQUOT)
lqe->lqe_nopreacq = true;
out:
adjust = qsd_adjust_needed(lqe);
if (reqbody && req_is_acq(reqbody->qb_flags) && ret != -EDQUOT) {
lqe->lqe_acq_rc = ret;
lqe->lqe_acq_time = cfs_time_current_64();
}
out_noadjust:
qsd_request_exit(lqe);
lqe_write_unlock(lqe);
/* release reference on per-ID lock */
if (lustre_handle_is_used(lockh))
ldlm_lock_decref(lockh, qsd_id_einfo.ei_mode);
if (cancel) {
qsd_adjust_schedule(lqe, false, true);
} else if (adjust) {
if (!ret || ret == -EDQUOT)
qsd_adjust_schedule(lqe, false, false);
else
qsd_adjust_schedule(lqe, true, false);
}
lqe_putref(lqe);
if (lvb)
OBD_FREE_PTR(lvb);
EXIT;
}
