* GPL HEADER END
*/
/*
- * Copyright (c) 2012 Intel, Inc.
+ * Copyright (c) 2012, 2017, Intel Corporation.
* Use is subject to license terms.
*
* Author: Johann Lombardi <johann.lombardi@intel.com>
* Author: Niu Yawei <yawei.niu@intel.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
#define DEBUG_SUBSYSTEM S_LQUOTA
#include <obd_class.h>
#include "qmt_internal.h"
/*
+ * Retrieve quota settings for a given identifier.
+ *
+ * \param env - is the environment passed by the caller
+ * \param qmt - is the quota master target
+ * \param restype - is the pool type, either block (i.e. LQUOTA_RES_DT) or inode
+ * (i.e. LQUOTA_RES_MD)
+ * \param qtype - is the quota type
+ * \param id - is the quota indentifier for which we want to acces quota
+ * settings.
+ * \param hard - is the output variable where to copy the hard limit
+ * \param soft - is the output variable where to copy the soft limit
+ * \param time - is the output variable where to copy the grace time
+ */
+static int qmt_get(const struct lu_env *env, struct qmt_device *qmt,
+ __u8 restype, __u8 qtype, union lquota_id *id,
+ __u64 *hard, __u64 *soft, __u64 *time, bool is_default,
+ char *pool_name)
+{
+ struct lquota_entry *lqe;
+ ENTRY;
+
+ LASSERT(!is_default || id->qid_uid == 0);
+ if (pool_name && !strnlen(pool_name, LOV_MAXPOOLNAME))
+ pool_name = NULL;
+
+ /* look-up lqe structure containing quota settings */
+ lqe = qmt_pool_lqe_lookup(env, qmt, restype, qtype, id, pool_name);
+ if (IS_ERR(lqe))
+ RETURN(PTR_ERR(lqe));
+
+ /* copy quota settings */
+ lqe_read_lock(lqe);
+ LQUOTA_DEBUG(lqe, "fetch settings");
+ if (hard != NULL)
+ *hard = lqe->lqe_hardlimit;
+ if (soft != NULL)
+ *soft = lqe->lqe_softlimit;
+ if (time != NULL) {
+ *time = lqe->lqe_gracetime;
+ if (lqe->lqe_is_default)
+ *time |= (__u64)LQUOTA_FLAG_DEFAULT <<
+ LQUOTA_GRACE_BITS;
+ }
+ lqe_read_unlock(lqe);
+
+ lqe_putref(lqe);
+ RETURN(0);
+}
+
+struct qmt_entry_iter_data {
+ const struct lu_env *qeid_env;
+ struct qmt_device *qeid_qmt;
+};
+
+static int qmt_entry_iter_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *d)
+{
+ struct qmt_entry_iter_data *iter = (struct qmt_entry_iter_data *)d;
+ struct lquota_entry *lqe;
+
+ lqe = hlist_entry(hnode, struct lquota_entry, lqe_hash);
+ LASSERT(atomic_read(&lqe->lqe_ref) > 0);
+
+ if (lqe->lqe_id.qid_uid == 0 || !lqe->lqe_is_default)
+ return 0;
+
+ return qmt_set_with_lqe(iter->qeid_env, iter->qeid_qmt, lqe, 0, 0, 0, 0,
+ true, true);
+}
+
+static void qmt_set_id_notify(const struct lu_env *env, struct qmt_device *qmt,
+ struct lquota_entry *lqe)
+{
+ struct lquota_entry *lqe_gl;
+ int rc;
+
+ lqe_gl = lqe->lqe_is_global ? lqe : NULL;
+ rc = qmt_pool_lqes_lookup_spec(env, qmt, lqe_rtype(lqe),
+ lqe_qtype(lqe), &lqe->lqe_id);
+ if (!qti_lqes_cnt(env))
+ GOTO(lqes_fini, rc);
+
+ if (!lqe_gl && qti_lqes_glbl(env)->lqe_is_global)
+ lqe_gl = qti_lqes_glbl(env);
+
+ if (!lqe_gl)
+ GOTO(lqes_fini, rc);
+
+ if (lqe_gl->lqe_glbl_data)
+ qmt_seed_glbe(env, lqe_gl->lqe_glbl_data);
+ /* Even if slaves haven't enqueued quota lock yet,
+ * it is needed to set lqe_revoke_time in qmt_id_lock_glimpse
+ * in case of reaching qpi_least_qunit */
+ qmt_id_lock_notify(qmt, lqe_gl);
+lqes_fini:
+ qti_lqes_fini(env);
+}
+
+/*
+ * Update quota settings for a given lqe.
+ *
+ * \param env - is the environment passed by the caller
+ * \param qmt - is the quota master target
+ * \param lqe - is the lquota_entry for which we want to modify quota
+ * settings.
+ * \param hard - is the new hard limit
+ * \param soft - is the new soft limit
+ * \param time - is the new grace time
+ * \param valid - is the list of settings to change
+ * \param is_default - true for default quota setting
+ * \param is_updated - true if the lqe is updated and no need to write back
+ */
+
+int qmt_set_with_lqe(const struct lu_env *env, struct qmt_device *qmt,
+ struct lquota_entry *lqe, __u64 hard, __u64 soft,
+ __u64 time, __u32 valid, bool is_default, bool is_updated)
+{
+ struct thandle *th = NULL;
+ time64_t now = 0;
+ __u64 ver;
+ bool dirtied = false;
+ int rc = 0;
+ bool need_id_notify = false;
+ ENTRY;
+
+ /* need to write back to global quota file? */
+ if (!is_updated) {
+ /* By default we should have here only 1 lqe,
+ * so no allocations should be done. */
+ if (qti_lqes_restore_init(env))
+ GOTO(out_nolock, rc = -ENOMEM);
+ /* allocate & start transaction with enough credits to update
+ * quota settings in the global index file */
+ th = qmt_trans_start(env, lqe);
+ if (IS_ERR(th))
+ GOTO(out_nolock, rc = PTR_ERR(th));
+ }
+
+ now = ktime_get_real_seconds();
+
+ lqe_write_lock(lqe);
+ LQUOTA_DEBUG(lqe,
+ "changing quota settings valid:%x hard:%llu soft:%llu time:%llu",
+ valid, hard, soft, time);
+
+ if (is_default && lqe->lqe_id.qid_uid != 0) {
+ LQUOTA_DEBUG(lqe, "set qid %llu to use default quota setting",
+ lqe->lqe_id.qid_uid);
+
+ qmt_lqe_set_default(env, lqe->lqe_site->lqs_parent, lqe, false);
+ GOTO(quota_set, 0);
+ }
+
+ if ((valid & QIF_TIMES) != 0 && lqe->lqe_gracetime != time) {
+ /* change time settings */
+ lqe->lqe_gracetime = time;
+ dirtied = true;
+ }
+
+ if ((valid & QIF_LIMITS) != 0 &&
+ (lqe->lqe_hardlimit != hard || lqe->lqe_softlimit != soft)) {
+ rc = qmt_validate_limits(lqe, hard, soft);
+ if (rc)
+ GOTO(out, rc);
+
+ /* change quota limits */
+ lqe->lqe_hardlimit = hard;
+ lqe->lqe_softlimit = soft;
+
+quota_set:
+ /* recompute qunit in case it was never initialized */
+ if (qmt_revalidate(env, lqe))
+ need_id_notify = true;
+
+ /* clear grace time */
+ if (lqe->lqe_softlimit == 0 ||
+ lqe->lqe_granted <= lqe->lqe_softlimit)
+ /* no soft limit or below soft limit, let's clear grace
+ * time */
+ lqe->lqe_gracetime = 0;
+ else if ((valid & QIF_TIMES) == 0)
+ /* set grace only if user hasn't provided his own */
+ lqe->lqe_gracetime = now + qmt_lqe_grace(lqe);
+
+ /* change enforced status based on new parameters */
+ if (lqe->lqe_id.qid_uid == 0 || (lqe->lqe_hardlimit == 0 &&
+ lqe->lqe_softlimit == 0))
+ lqe->lqe_enforced = false;
+ else
+ lqe->lqe_enforced = true;
+
+ dirtied = true;
+ }
+
+ if (!is_default && lqe->lqe_is_default) {
+ LQUOTA_DEBUG(lqe, "the qid %llu has been set quota"
+ " explicitly, clear the default flag",
+ lqe->lqe_id.qid_uid);
+
+ qmt_lqe_clear_default(lqe);
+ dirtied = true;
+ }
+
+ if (dirtied) {
+ if (!is_updated) {
+ /* write new quota settings to disk */
+ rc = qmt_glb_write(env, th, lqe, LQUOTA_BUMP_VER, &ver);
+ if (rc) {
+ /* restore initial quota settings */
+ qmt_restore(lqe, &qti_lqes_rstr(env)[0]);
+ GOTO(out, rc);
+ }
+ } else {
+ ver = dt_version_get(env, LQE_GLB_OBJ(lqe));
+ }
+
+ /* compute new qunit value now that we have modified the quota
+ * settings or clear/set edquot flag if needed */
+ need_id_notify |= qmt_adjust_qunit(env, lqe);
+ need_id_notify |= qmt_adjust_edquot(lqe, now);
+ }
+ EXIT;
+out:
+ lqe_write_unlock(lqe);
+
+out_nolock:
+ qti_lqes_restore_fini(env);
+ if (th != NULL && !IS_ERR(th))
+ dt_trans_stop(env, qmt->qmt_child, th);
+
+ if (rc == 0 && dirtied) {
+ qmt_glb_lock_notify(env, lqe, ver);
+ if (lqe->lqe_id.qid_uid == 0) {
+ struct qmt_entry_iter_data iter_data;
+
+ LQUOTA_DEBUG(lqe, "notify all lqe with default quota");
+ iter_data.qeid_env = env;
+ iter_data.qeid_qmt = qmt;
+ cfs_hash_for_each(lqe->lqe_site->lqs_hash,
+ qmt_entry_iter_cb, &iter_data);
+ /* Always notify slaves with default values. Don't
+ * care about overhead as will be sent only not changed
+ * values(see qmt_id_lock_cb for details).*/
+ need_id_notify = true;
+ }
+ if (need_id_notify)
+ qmt_set_id_notify(env, qmt, lqe);
+ }
+
+ return rc;
+}
+
+/*
+ * Update quota settings for a given identifier.
+ *
+ * \param env - is the environment passed by the caller
+ * \param qmt - is the quota master target
+ * \param restype - is the pool type, either block (i.e. LQUOTA_RES_DT) or
+ * inode (i.e. LQUOTA_RES_MD)
+ * \param qtype - is the quota type
+ * \param id - is the quota indentifier for which we want to modify
+ * quota settings.
+ * \param hard - is the new hard limit
+ * \param soft - is the new soft limit
+ * \param time - is the new grace time
+ * \param valid - is the list of settings to change
+ * \param is_default - true for default quota setting
+ * \param is_updated - true if the lqe is updated and no need to write back
+ */
+static int qmt_set(const struct lu_env *env, struct qmt_device *qmt,
+ __u8 restype, __u8 qtype, union lquota_id *id,
+ __u64 hard, __u64 soft, __u64 time, __u32 valid,
+ bool is_default, bool is_updated, char *pool_name)
+{
+ struct lquota_entry *lqe;
+ int rc;
+ ENTRY;
+
+ if (pool_name && !strnlen(pool_name, LOV_MAXPOOLNAME))
+ pool_name = NULL;
+
+ /* look-up quota entry associated with this ID */
+ lqe = qmt_pool_lqe_lookup(env, qmt, restype, qtype, id, pool_name);
+ if (IS_ERR(lqe))
+ RETURN(PTR_ERR(lqe));
+
+ rc = qmt_set_with_lqe(env, qmt, lqe, hard, soft, time, valid,
+ is_default, is_updated);
+ lqe_putref(lqe);
+ RETURN(rc);
+}
+
+/*
* Handle quotactl request.
*
* \param env - is the environment passed by the caller
static int qmt_quotactl(const struct lu_env *env, struct lu_device *ld,
struct obd_quotactl *oqctl)
{
- struct qmt_device *qmt = lu2qmt_dev(ld);
- int rc = 0;
+ struct qmt_thread_info *qti = qmt_info(env);
+ union lquota_id *id = &qti->qti_id;
+ struct qmt_device *qmt = lu2qmt_dev(ld);
+ struct obd_dqblk *dqb = &oqctl->qc_dqblk;
+ char *poolname;
+ int rc = 0;
+ bool is_default = false;
ENTRY;
LASSERT(qmt != NULL);
- if (oqctl->qc_type >= MAXQUOTAS)
+ if (oqctl->qc_type >= LL_MAXQUOTAS)
/* invalid quota type */
RETURN(-EINVAL);
+ poolname = LUSTRE_Q_CMD_IS_POOL(oqctl->qc_cmd) ?
+ oqctl->qc_poolname : NULL;
+
switch (oqctl->qc_cmd) {
- case Q_GETINFO:
- case Q_SETINFO:
- case Q_SETQUOTA:
- /* XXX: not implemented yet. */
- CERROR("quotactl operation %d not implemented yet\n",
- oqctl->qc_cmd);
- RETURN(-EOPNOTSUPP);
-
- case Q_GETQUOTA:
- /* XXX: return no limit for now, just for testing purpose */
- memset(&oqctl->qc_dqblk, 0, sizeof(struct obd_dqblk));
- oqctl->qc_dqblk.dqb_valid = QIF_LIMITS;
- rc = 0;
+ case Q_GETINFO: /* read grace times */
+ case LUSTRE_Q_GETINFOPOOL:
+ /* Global grace time is stored in quota settings of ID 0. */
+ id->qid_uid = 0;
+
+ /* read inode grace time */
+ rc = qmt_get(env, qmt, LQUOTA_RES_MD, oqctl->qc_type, id, NULL,
+ NULL, &oqctl->qc_dqinfo.dqi_igrace,
+ false, poolname);
+ /* There could be no MD pool, so try to find DT pool */
+ if (rc && rc != -ENOENT)
+ break;
+
+ /* read block grace time */
+ rc = qmt_get(env, qmt, LQUOTA_RES_DT, oqctl->qc_type, id, NULL,
+ NULL, &oqctl->qc_dqinfo.dqi_bgrace,
+ false, poolname);
+ break;
+
+ case Q_SETINFO: /* modify grace times */
+ case LUSTRE_Q_SETINFOPOOL:
+ /* setinfo should be using dqi->dqi_valid, but lfs incorrectly
+ * sets the valid flags in dqb->dqb_valid instead, try to live
+ * with that ... */
+
+ /* Global grace time is stored in quota settings of ID 0. */
+ id->qid_uid = 0;
+
+ if ((dqb->dqb_valid & QIF_ITIME) != 0) {
+ /* set inode grace time */
+ rc = qmt_set(env, qmt, LQUOTA_RES_MD, oqctl->qc_type,
+ id, 0, 0, oqctl->qc_dqinfo.dqi_igrace,
+ QIF_TIMES, false, false,
+ poolname);
+ if (rc)
+ break;
+ }
+
+ if ((dqb->dqb_valid & QIF_BTIME) != 0)
+ /* set block grace time */
+ rc = qmt_set(env, qmt, LQUOTA_RES_DT, oqctl->qc_type,
+ id, 0, 0, oqctl->qc_dqinfo.dqi_bgrace,
+ QIF_TIMES, false, false,
+ poolname);
+ break;
+
+ case LUSTRE_Q_GETDEFAULT:
+ case LUSTRE_Q_GETDEFAULT_POOL:
+ is_default = true;
+ /* fallthrough */
+
+ case Q_GETQUOTA: /* consult quota limit */
+ case LUSTRE_Q_GETQUOTAPOOL:
+ /* extract quota ID from quotactl request */
+ id->qid_uid = oqctl->qc_id;
+
+ /* look-up inode quota settings */
+ rc = qmt_get(env, qmt, LQUOTA_RES_MD, oqctl->qc_type, id,
+ &dqb->dqb_ihardlimit, &dqb->dqb_isoftlimit,
+ &dqb->dqb_itime, is_default, poolname);
+ /* There could be no MD pool, so try to find DT pool */
+ if (rc && rc != -ENOENT)
+ break;
+ else
+ dqb->dqb_valid |= QIF_ILIMITS | QIF_ITIME;
+
+ /* master isn't aware of actual inode usage */
+ dqb->dqb_curinodes = 0;
+
+ /* look-up block quota settings */
+ rc = qmt_get(env, qmt, LQUOTA_RES_DT, oqctl->qc_type, id,
+ &dqb->dqb_bhardlimit, &dqb->dqb_bsoftlimit,
+ &dqb->dqb_btime, is_default, poolname);
+ if (rc)
+ break;
+
+ dqb->dqb_valid |= QIF_BLIMITS | QIF_BTIME;
+ /* master doesn't know the actual block usage */
+ dqb->dqb_curspace = 0;
+ break;
+
+ case LUSTRE_Q_SETDEFAULT:
+ case LUSTRE_Q_SETDEFAULT_POOL:
+ is_default = true;
+ /* fallthrough */
+
+ case Q_SETQUOTA: /* change quota limits */
+ case LUSTRE_Q_SETQUOTAPOOL:
+ /* extract quota ID from quotactl request */
+ id->qid_uid = oqctl->qc_id;
+
+ if ((dqb->dqb_valid & QIF_IFLAGS) != 0) {
+ /* update inode quota settings */
+ rc = qmt_set(env, qmt, LQUOTA_RES_MD, oqctl->qc_type,
+ id, dqb->dqb_ihardlimit,
+ dqb->dqb_isoftlimit, dqb->dqb_itime,
+ dqb->dqb_valid & QIF_IFLAGS, is_default,
+ false, poolname);
+ if (rc)
+ break;
+ }
+
+ if ((dqb->dqb_valid & QIF_BFLAGS) != 0)
+ /* update block quota settings */
+ rc = qmt_set(env, qmt, LQUOTA_RES_DT, oqctl->qc_type,
+ id, dqb->dqb_bhardlimit,
+ dqb->dqb_bsoftlimit, dqb->dqb_btime,
+ dqb->dqb_valid & QIF_BFLAGS, is_default,
+ false, poolname);
break;
default:
CERROR("%s: unsupported quotactl command: %d\n",
qmt->qmt_svname, oqctl->qc_cmd);
- RETURN(-EFAULT);
+ RETURN(-ENOTSUPP);
+ }
+
+ RETURN(rc);
+}
+
+static inline
+void qmt_grant_lqes(const struct lu_env *env, __u64 *slv, __u64 cnt)
+{
+ int i;
+
+ for (i = 0; i < qti_lqes_cnt(env); i++)
+ qti_lqe_granted(env, i) += cnt;
+
+ *slv += cnt;
+}
+
+static inline bool qmt_lqes_can_rel(const struct lu_env *env, __u64 cnt)
+{
+ bool can_release = true;
+ int i;
+
+ for (i = 0; i < qti_lqes_cnt(env); i++) {
+ if (cnt > qti_lqe_granted(env, i)) {
+ LQUOTA_ERROR(qti_lqes(env)[i],
+ "Can't release %llu that is larger than lqe_granted.\n",
+ cnt);
+ can_release = false;
+ }
+ }
+ return can_release;
+}
+
+static inline void qmt_rel_lqes(const struct lu_env *env, __u64 *slv, __u64 cnt)
+{
+ int i;
+
+ for (i = 0; i < qti_lqes_cnt(env); i++)
+ qti_lqe_granted(env, i) -= cnt;
+
+ *slv -= cnt;
+}
+
+static inline bool qmt_lqes_cannot_grant(const struct lu_env *env, __u64 cnt)
+{
+ bool cannot_grant = false;
+ int i;
+
+ for (i = 0; i < qti_lqes_cnt(env); i++) {
+ if (qti_lqe_hard(env, i) != 0 &&
+ qti_lqe_granted(env, i) + cnt > qti_lqe_hard(env, i)) {
+ cannot_grant = true;
+ break;
+ }
+ }
+ return cannot_grant;
+}
+
+static inline __u64 qmt_lqes_grant_some_quota(const struct lu_env *env)
+{
+ __u64 min_count, tmp;
+ bool flag = false;
+ int i;
+
+ for (i = 0, min_count = 0; i < qti_lqes_cnt(env); i++) {
+ if (!qti_lqes(env)[i]->lqe_enforced &&
+ !qti_lqes(env)[i]->lqe_is_global)
+ continue;
+
+ tmp = qti_lqe_hard(env, i) - qti_lqe_granted(env, i);
+ if (flag) {
+ min_count = tmp < min_count ? tmp : min_count;
+ } else {
+ flag = true;
+ min_count = tmp;
+ }
+ }
+ return min_count;
+}
+
+static inline __u64 qmt_lqes_alloc_expand(const struct lu_env *env,
+ __u64 slv_granted, __u64 spare)
+{
+ __u64 min_count, tmp;
+ bool flag = false;
+ int i;
+
+ for (i = 0, min_count = 0; i < qti_lqes_cnt(env); i++) {
+ /* Don't take into account not enforced lqes that belong
+ * to non global pool. These lqes present in array to
+ * support actual lqe_granted even for lqes without limits. */
+ if (!qti_lqes(env)[i]->lqe_enforced &&
+ !qti_lqes(env)[i]->lqe_is_global)
+ continue;
+
+ tmp = qmt_alloc_expand(qti_lqes(env)[i], slv_granted, spare);
+ if (flag) {
+ min_count = tmp < min_count ? tmp : min_count;
+ } else {
+ flag = true;
+ min_count = tmp;
+ }
+ }
+ return min_count;
+}
+
+static inline void qmt_lqes_tune_grace(const struct lu_env *env, __u64 now)
+{
+ int i;
+
+ for (i = 0; i < qti_lqes_cnt(env); i++) {
+ struct lquota_entry *lqe;
+
+ lqe = qti_lqes(env)[i];
+ if (lqe->lqe_softlimit != 0) {
+ if (lqe->lqe_granted > lqe->lqe_softlimit &&
+ lqe->lqe_gracetime == 0) {
+ /* First time over soft limit, let's start grace
+ * timer */
+ lqe->lqe_gracetime = now + qmt_lqe_grace(lqe);
+ } else if (lqe->lqe_granted <= lqe->lqe_softlimit &&
+ lqe->lqe_gracetime != 0) {
+ /* Clear grace timer */
+ lqe->lqe_gracetime = 0;
+ }
+ }
+ }
+}
+
+/*
+ * Helper function to handle quota request from slave.
+ *
+ * \param env - is the environment passed by the caller
+ * \param qmt - is the master device
+ * \param uuid - is the uuid associated with the slave
+ * \param qb_flags - are the quota request flags as packed in the quota_body
+ * \param qb_count - is the amount of quota space the slave wants to
+ * acquire/release
+ * \param qb_usage - is the current space usage on the slave
+ * \param repbody - is the quota_body of reply
+ *
+ * \retval 0 : success
+ * \retval -EDQUOT : out of quota
+ * -EINPROGRESS : inform client to retry write/create
+ * -ve : other appropriate errors
+ */
+int qmt_dqacq0(const struct lu_env *env, struct qmt_device *qmt,
+ struct obd_uuid *uuid, __u32 qb_flags, __u64 qb_count,
+ __u64 qb_usage, struct quota_body *repbody)
+{
+ __u64 now, count;
+ struct dt_object *slv_obj = NULL;
+ __u64 slv_granted, slv_granted_bck;
+ struct thandle *th = NULL;
+ int rc, ret;
+ struct lquota_entry *lqe = qti_lqes_glbl(env);
+ ENTRY;
+
+ LASSERT(uuid != NULL);
+
+ /* initialize reply */
+ memset(repbody, 0, sizeof(*repbody));
+ memcpy(&repbody->qb_id, &lqe->lqe_id, sizeof(repbody->qb_id));
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_QUOTA_RECOVERABLE_ERR))
+ RETURN(-cfs_fail_val);
+
+ if (qti_lqes_restore_init(env))
+ RETURN(-ENOMEM);
+
+ /* look-up index file associated with acquiring slave */
+ slv_obj = lquota_disk_slv_find(env, qmt->qmt_child, LQE_ROOT(lqe),
+ lu_object_fid(&LQE_GLB_OBJ(lqe)->do_lu),
+ uuid);
+ if (IS_ERR(slv_obj))
+ GOTO(out, rc = PTR_ERR(slv_obj));
+
+ /* pack slave fid in reply just for sanity check */
+ memcpy(&repbody->qb_slv_fid, lu_object_fid(&slv_obj->do_lu),
+ sizeof(struct lu_fid));
+
+ /* allocate & start transaction with enough credits to update
+ * global & slave indexes */
+ th = qmt_trans_start_with_slv(env, NULL, slv_obj, false);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ qti_lqes_write_lock(env);
+
+ LQUOTA_DEBUG_LQES(env, "dqacq starts uuid:%s flags:0x%x wanted:%llu"
+ " usage:%llu", obd_uuid2str(uuid), qb_flags, qb_count,
+ qb_usage);
+
+ /* Legal race, limits have been removed on master, but slave didn't
+ * receive the change yet. Just return EINPROGRESS until the slave gets
+ * notified. */
+ if (!lqe->lqe_enforced && !req_is_rel(qb_flags))
+ GOTO(out_locked, rc = -ESRCH);
+
+ /* recompute qunit in case it was never initialized */
+ qmt_revalidate_lqes(env, qmt, qb_flags);
+
+ /* slave just wants to acquire per-ID lock */
+ if (req_is_acq(qb_flags) && qb_count == 0)
+ GOTO(out_locked, rc = 0);
+
+ /* fetch how much quota space is already granted to this slave */
+ rc = qmt_slv_read(env, &lqe->lqe_id, slv_obj, &slv_granted);
+ if (rc) {
+ LQUOTA_ERROR(lqe, "Failed to get granted for slave %s, rc=%d",
+ obd_uuid2str(uuid), rc);
+ GOTO(out_locked, rc);
+ }
+ /* recall how much space this slave currently owns in order to restore
+ * it in case of failure */
+ slv_granted_bck = slv_granted;
+
+ /* record current time for soft limit & grace time management */
+ now = ktime_get_real_seconds();
+
+ if (req_is_rel(qb_flags)) {
+ /* Slave would like to release quota space */
+ if (slv_granted < qb_count ||
+ !qmt_lqes_can_rel(env, qb_count)) {
+ /* can't release more than granted */
+ LQUOTA_ERROR_LQES(env,
+ "Release too much! uuid:%s release: %llu granted:%llu, total:%llu",
+ obd_uuid2str(uuid), qb_count,
+ slv_granted, lqe->lqe_granted);
+ GOTO(out_locked, rc = -EINVAL);
+ }
+
+ repbody->qb_count = qb_count;
+ /* put released space back to global pool */
+ qmt_rel_lqes(env, &slv_granted, qb_count);
+ GOTO(out_write, rc = 0);
+ }
+
+ if (req_has_rep(qb_flags) && slv_granted < qb_usage) {
+ /* Slave is reporting space usage in quota request and it turns
+ * out to be using more quota space than owned, so we adjust
+ * granted space regardless of the current state of affairs */
+ repbody->qb_count = qb_usage - slv_granted;
+ qmt_grant_lqes(env, &slv_granted, repbody->qb_count);
+ }
+
+ if (!req_is_acq(qb_flags) && !req_is_preacq(qb_flags))
+ GOTO(out_write, rc = 0);
+
+ qmt_adjust_edquot_notify(env, qmt, now, qb_flags);
+ if (qti_lqes_edquot(env))
+ /* no hope to claim further space back */
+ GOTO(out_write, rc = -EDQUOT);
+
+ if (qmt_space_exhausted_lqes(env, now)) {
+ /* might have some free space once rebalancing is completed */
+ rc = req_is_acq(qb_flags) ? -EINPROGRESS : -EDQUOT;
+ GOTO(out_write, rc);
+ }
+
+ if (req_is_preacq(qb_flags)) {
+ /* slave would like to pre-acquire quota space. To do so, it
+ * reports in qb_count how much spare quota space it owns and we
+ * can grant back quota space which is consistent with qunit
+ * value. */
+ if (qb_count >= qti_lqes_min_qunit(env))
+ /* slave already own the maximum it should */
+ GOTO(out_write, rc = 0);
+
+ count = qmt_lqes_alloc_expand(env, slv_granted, qb_count);
+ if (count == 0)
+ GOTO(out_write, rc = -EDQUOT);
+
+ repbody->qb_count += count;
+ qmt_grant_lqes(env, &slv_granted, count);
+ GOTO(out_write, rc = 0);
+ }
+
+ /* processing acquire request with clients waiting */
+ if (qmt_lqes_cannot_grant(env, qb_count)) {
+ /* cannot grant as much as asked, but can still afford to grant
+ * some quota space back */
+ count = qmt_lqes_grant_some_quota(env);
+ repbody->qb_count += count;
+ qmt_grant_lqes(env, &slv_granted, count);
+ GOTO(out_write, rc = 0);
+ }
+
+ /* Whouhou! we can satisfy the slave request! */
+ repbody->qb_count += qb_count;
+ qmt_grant_lqes(env, &slv_granted, qb_count);
+
+ /* Try to expand the acquired count for DQACQ */
+ count = qmt_lqes_alloc_expand(env, slv_granted, 0);
+ if (count != 0) {
+ /* can even grant more than asked, it is like xmas ... */
+ repbody->qb_count += count;
+ qmt_grant_lqes(env, &slv_granted, count);
+ GOTO(out_write, rc = 0);
+ }
+
+ GOTO(out_write, rc = 0);
+out_write:
+ if (repbody->qb_count == 0)
+ GOTO(out_locked, rc);
+
+ /* start/stop grace timer if required */
+ qmt_lqes_tune_grace(env, now);
+
+ /* Update slave index first since it is easier to roll back */
+ ret = qmt_slv_write(env, th, lqe, slv_obj, LQUOTA_BUMP_VER,
+ &repbody->qb_slv_ver, slv_granted);
+ if (ret) {
+ /* restore initial quota settings */
+ qmt_restore_lqes(env);
+ /* reset qb_count */
+ repbody->qb_count = 0;
+ GOTO(out_locked, rc = ret);
+ }
+
+ /* Update global index, no version bump needed */
+ ret = qmt_glb_write_lqes(env, th, 0, NULL);
+ if (ret) {
+ rc = ret;
+ /* restore initial quota settings */
+ qmt_restore_lqes(env);
+ /* reset qb_count */
+ repbody->qb_count = 0;
+
+ /* restore previous granted value */
+ ret = qmt_slv_write(env, th, lqe, slv_obj, 0, NULL,
+ slv_granted_bck);
+ if (ret) {
+ LQUOTA_ERROR(lqe, "failed to restore initial slave "
+ "value rc:%d ret%d", rc, ret);
+ LBUG();
+ }
+ qmt_adjust_edquot_notify(env, qmt, now, qb_flags);
+ GOTO(out_locked, rc);
+ }
+
+ /* Total granted has been changed, let's try to adjust the qunit
+ * size according to the total granted & limits. */
+
+ /* clear/set edquot flag and notify slaves via glimpse if needed */
+ qmt_adjust_and_notify(env, qmt, now, qb_flags);
+out_locked:
+ LQUOTA_DEBUG_LQES(env, "dqacq ends count:%llu ver:%llu rc:%d",
+ repbody->qb_count, repbody->qb_slv_ver, rc);
+ qti_lqes_write_unlock(env);
+out:
+ qti_lqes_restore_fini(env);
+
+ if (th != NULL && !IS_ERR(th))
+ dt_trans_stop(env, qmt->qmt_child, th);
+
+ if (slv_obj != NULL && !IS_ERR(slv_obj))
+ dt_object_put(env, slv_obj);
+
+ if ((req_is_acq(qb_flags) || req_is_preacq(qb_flags)) &&
+ OBD_FAIL_CHECK(OBD_FAIL_QUOTA_EDQUOT)) {
+ /* introduce inconsistency between granted value in slave index
+ * and slave index copy of slave */
+ repbody->qb_count = 0;
+ rc = -EDQUOT;
+ }
+
+ RETURN(rc);
+}
+
+/*
+ * Extract index from uuid or quota index file name.
+ *
+ * \param[in] uuid uuid or quota index name(0x1020000-OST0001_UUID)
+ * \param[out] idx pointer to save index
+ *
+ * \retval slave type(QMT_STYPE_MDT or QMT_STYPE_OST)
+ * \retval -EINVAL wrong uuid
+ */
+int qmt_uuid2idx(struct obd_uuid *uuid, int *idx)
+{
+ char *uuid_str, *name, *dash;
+ int rc = -EINVAL;
+
+ uuid_str = (char *)uuid->uuid;
+
+ if (strnlen(uuid_str, UUID_MAX) >= UUID_MAX) {
+ CERROR("quota: UUID '%.*s' missing trailing NUL: rc = %d\n",
+ UUID_MAX, uuid_str, rc);
+ return rc;
+ }
+
+ dash = strrchr(uuid_str, '-');
+ name = dash + 1;
+ /* Going to get index from MDTXXXX/OSTXXXX. Thus uuid should
+ * have at least 8 bytes after '-': 3 for MDT/OST, 4 for index
+ * and 1 byte for null character. */
+ if (*dash != '-' || ((uuid_str + UUID_MAX - name) < 8)) {
+ CERROR("quota: wrong UUID format '%s': rc = %d\n",
+ uuid_str, rc);
+ return rc;
+ }
+
+ rc = target_name2index(name, idx, NULL);
+ switch (rc) {
+ case LDD_F_SV_TYPE_MDT:
+ rc = QMT_STYPE_MDT;
+ break;
+ case LDD_F_SV_TYPE_OST:
+ rc = QMT_STYPE_OST;
+ break;
+ default:
+ CERROR("quota: wrong UUID type '%s': rc = %d\n", uuid_str, rc);
+ rc = -EINVAL;
}
RETURN(rc);
static int qmt_dqacq(const struct lu_env *env, struct lu_device *ld,
struct ptlrpc_request *req)
{
- struct quota_body *qbody, *repbody;
+ struct qmt_device *qmt = lu2qmt_dev(ld);
+ struct quota_body *qbody, *repbody;
+ struct obd_uuid *uuid;
+ struct ldlm_lock *lock;
+ int rtype, qtype;
+ int rc, idx, stype;
ENTRY;
qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
if (repbody == NULL)
RETURN(err_serious(-EFAULT));
- RETURN(0);
+ /* verify if global lock is stale */
+ if (!lustre_handle_is_used(&qbody->qb_glb_lockh))
+ RETURN(-ENOLCK);
+
+ lock = ldlm_handle2lock(&qbody->qb_glb_lockh);
+ if (lock == NULL)
+ RETURN(-ENOLCK);
+ LDLM_LOCK_PUT(lock);
+
+ uuid = &req->rq_export->exp_client_uuid;
+ stype = qmt_uuid2idx(uuid, &idx);
+ if (stype < 0)
+ RETURN(stype);
+
+ if (req_is_rel(qbody->qb_flags) + req_is_acq(qbody->qb_flags) +
+ req_is_preacq(qbody->qb_flags) > 1) {
+ CERROR("%s: malformed quota request with conflicting flags set "
+ "(%x) from slave %s\n", qmt->qmt_svname,
+ qbody->qb_flags, obd_uuid2str(uuid));
+ RETURN(-EPROTO);
+ }
+
+ if (req_is_acq(qbody->qb_flags) || req_is_preacq(qbody->qb_flags)) {
+ /* acquire and pre-acquire should use a valid ID lock */
+
+ if (!lustre_handle_is_used(&qbody->qb_lockh))
+ RETURN(-ENOLCK);
+
+ lock = ldlm_handle2lock(&qbody->qb_lockh);
+ if (lock == NULL)
+ /* no lock associated with this handle */
+ RETURN(-ENOLCK);
+
+ LDLM_DEBUG(lock, "%sacquire request",
+ req_is_preacq(qbody->qb_flags) ? "pre" : "");
+
+ if (!obd_uuid_equals(&lock->l_export->exp_client_uuid, uuid)) {
+ /* sorry, no way to cheat ... */
+ LDLM_LOCK_PUT(lock);
+ RETURN(-ENOLCK);
+ }
+
+ if (ldlm_is_ast_sent(lock)) {
+ struct ptlrpc_service_part *svc;
+ timeout_t timeout;
+
+ svc = req->rq_rqbd->rqbd_svcpt;
+ timeout = at_est2timeout(at_get(&svc->scp_at_estimate));
+ timeout += (ldlm_bl_timeout(lock) >> 1);
+
+ /* lock is being cancelled, prolong timeout */
+ ldlm_refresh_waiting_lock(lock, timeout);
+ }
+ LDLM_LOCK_PUT(lock);
+ }
+
+ /* extract quota information from global index FID packed in the
+ * request */
+ rc = lquota_extract_fid(&qbody->qb_fid, &rtype, &qtype);
+ if (rc)
+ RETURN(-EINVAL);
+
+ /* Find the quota entry associated with the quota id */
+ rc = qmt_pool_lqes_lookup(env, qmt, rtype, stype, qtype,
+ &qbody->qb_id, NULL, idx);
+ if (rc)
+ RETURN(rc);
+
+ rc = qmt_dqacq0(env, qmt, uuid, qbody->qb_flags,
+ qbody->qb_count, qbody->qb_usage, repbody);
+
+ if (lustre_handle_is_used(&qbody->qb_lockh))
+ /* return current qunit value only to slaves owning an per-ID
+ * quota lock. For enqueue, the qunit value will be returned in
+ * the LVB */
+ repbody->qb_qunit = qti_lqes_min_qunit(env);
+ CDEBUG(D_QUOTA, "qmt_dqacq return qb_qunit %llu qb_count %llu\n",
+ repbody->qb_qunit, repbody->qb_count);
+ qti_lqes_fini(env);
+ RETURN(rc);
}
/* Vector of quota request handlers. This vector is used by the MDT to forward
git://git.whamcloud.com / fs / lustre-release.git / blobdiff