* GPL HEADER END
*/
/*
- * Copyright (c) 2012 Intel, Inc.
+ * Copyright (c) 2012, Intel Corporation.
* Use is subject to license terms.
*
* Author: Johann Lombardi <johann.lombardi@intel.com>
#include "qmt_internal.h"
/*
- * Fetch grace time for either inode or block.
- *
- * \param env - is the environment passed by the caller
- * \param qmt - is the quota master target
- * \param pool_id - is the 16-bit pool identifier
- * \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 time - is the output variable where to copy the grace time
- */
-static int qmt_getinfo(const struct lu_env *env, struct qmt_device *qmt,
- __u16 pool_id, __u8 restype, __u8 qtype, __u64 *time)
-{
- struct qmt_thread_info *qti = qmt_info(env);
- union lquota_id *id = &qti->qti_id_bis;
- struct lquota_entry *lqe;
- ENTRY;
-
- /* Global grace time is stored in quota settings of ID 0. */
- id->qid_uid = 0;
-
- /* look-up quota entry storing grace time */
- lqe = qmt_pool_lqe_lookup(env, qmt, pool_id, restype, qtype, id);
- if (IS_ERR(lqe))
- RETURN(PTR_ERR(lqe));
-
- lqe_read_lock(lqe);
- LQUOTA_DEBUG(lqe, "getinfo");
- /* copy grace time */
- *time = lqe->lqe_gracetime;
- lqe_read_unlock(lqe);
-
- lqe_putref(lqe);
- RETURN(0);
-}
-
-/*
- * Update grace time for either inode or block.
- * Global grace time is stored in quota settings of ID 0.
- *
- * \param env - is the environment passed by the caller
- * \param qmt - is the quota master target
- * \param pool_id - is the 16-bit pool identifier
- * \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 time - is the new grace time
- */
-static int qmt_setinfo(const struct lu_env *env, struct qmt_device *qmt,
- __u16 pool_id, __u8 restype, __u8 qtype, __u64 time)
-{
- struct qmt_thread_info *qti = qmt_info(env);
- union lquota_id *id = &qti->qti_id_bis;
- struct lquota_entry *lqe;
- struct thandle *th = NULL;
- int rc;
- ENTRY;
-
- /* Global grace time is stored in quota settings of ID 0. */
- id->qid_uid = 0;
-
- /* look-up quota entry storing the global grace time */
- lqe = qmt_pool_lqe_lookup(env, qmt, pool_id, restype, qtype, id);
- if (IS_ERR(lqe))
- RETURN(PTR_ERR(lqe));
-
- /* allocate & start transaction with enough credits to update grace
- * time in the global index file */
- th = qmt_trans_start(env, lqe, &qti->qti_restore);
- if (IS_ERR(th))
- GOTO(out_nolock, rc = PTR_ERR(th));
-
- /* write lock quota entry storing the grace time */
- lqe_write_lock(lqe);
- if (lqe->lqe_gracetime == time)
- /* grace time is the same */
- GOTO(out, rc = 0);
-
- LQUOTA_DEBUG(lqe, "setinfo time:"LPU64, time);
-
- /* set new grace time */
- lqe->lqe_gracetime = time;
- /* always set enforced bit for ID 0 to make sure it does not go away */
- lqe->lqe_enforced = true;
-
- /* write new grace time to disk, no need for version bump */
- rc = qmt_glb_write(env, th, lqe, 0, NULL);
- if (rc) {
- /* restore initial grace time */
- qmt_restore(lqe, &qti->qti_restore);
- GOTO(out, rc);
- }
- EXIT;
-out:
- lqe_write_unlock(lqe);
-out_nolock:
- lqe_putref(lqe);
- if (th != NULL && !IS_ERR(th))
- dt_trans_stop(env, qmt->qmt_child, th);
- return rc;
-}
-
-/*
* Retrieve quota settings for a given identifier.
*
* \param env - is the environment passed by the caller
* \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_getquota(const struct lu_env *env, struct qmt_device *qmt,
- __u16 pool_id, __u8 restype, __u8 qtype,
- union lquota_id *id, __u64 *hard, __u64 *soft,
- __u64 *time)
+static int qmt_get(const struct lu_env *env, struct qmt_device *qmt,
+ __u16 pool_id, __u8 restype, __u8 qtype, union lquota_id *id,
+ __u64 *hard, __u64 *soft, __u64 *time)
{
struct lquota_entry *lqe;
ENTRY;
/* copy quota settings */
lqe_read_lock(lqe);
- LQUOTA_DEBUG(lqe, "getquota");
- *hard = lqe->lqe_hardlimit;
- *soft = lqe->lqe_softlimit;
- *time = lqe->lqe_gracetime;
+ 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;
lqe_read_unlock(lqe);
lqe_putref(lqe);
* \param time - is the new grace time
* \param valid - is the list of settings to change
*/
-static int qmt_setquota(const struct lu_env *env, struct qmt_device *qmt,
- __u16 pool_id, __u8 restype, __u8 qtype,
- union lquota_id *id, __u64 hard, __u64 soft, __u64 time,
- __u32 valid)
+static int qmt_set(const struct lu_env *env, struct qmt_device *qmt,
+ __u16 pool_id, __u8 restype, __u8 qtype,
+ union lquota_id *id, __u64 hard, __u64 soft, __u64 time,
+ __u32 valid)
{
struct qmt_thread_info *qti = qmt_info(env);
struct lquota_entry *lqe;
struct thandle *th = NULL;
- __u64 grace, ver;
- bool dirtied = false, bump_version = false;
+ __u64 ver, now;
+ bool dirtied = false;
int rc = 0;
ENTRY;
- /* fetch global grace time */
- rc = qmt_getinfo(env, qmt, pool_id, restype, qtype, &grace);
- if (rc)
- RETURN(rc);
-
/* look-up quota entry associated with this ID */
lqe = qmt_pool_lqe_lookup(env, qmt, pool_id, restype, qtype, id);
if (IS_ERR(lqe))
if (IS_ERR(th))
GOTO(out_nolock, rc = PTR_ERR(th));
+ now = cfs_time_current_sec();
+
lqe_write_lock(lqe);
- LQUOTA_DEBUG(lqe, "setquota valid:%x hard:"LPU64" soft:"LPU64
- " time:"LPU64, valid, hard, soft, time);
+ LQUOTA_DEBUG(lqe, "changing quota settings valid:%x hard:"LPU64" soft:"
+ LPU64" time:"LPU64, valid, hard, soft, time);
if ((valid & QIF_TIMES) != 0 && lqe->lqe_gracetime != time) {
/* change time settings */
if ((valid & QIF_LIMITS) != 0 &&
(lqe->lqe_hardlimit != hard || lqe->lqe_softlimit != soft)) {
- bool enforced = lqe->lqe_enforced;
-
rc = qmt_validate_limits(lqe, hard, soft);
if (rc)
GOTO(out, rc);
+ /* recompute qunit in case it was never initialized */
+ qmt_revalidate(env, lqe);
+
/* change quota limits */
lqe->lqe_hardlimit = hard;
lqe->lqe_softlimit = soft;
lqe->lqe_gracetime = 0;
else if ((valid & QIF_TIMES) == 0)
/* set grace only if user hasn't provided his own */
- lqe->lqe_gracetime = cfs_time_current_sec() + grace;
+ lqe->lqe_gracetime = now + qmt_lqe_grace(lqe);
/* change enforced status based on new parameters */
if (lqe->lqe_hardlimit == 0 && lqe->lqe_softlimit == 0)
else
lqe->lqe_enforced = true;
- if ((enforced && !lqe->lqe_enforced) ||
- (!enforced && lqe->lqe_enforced))
- /* if enforced status has changed, we need to inform
- * slave, therefore we need to bump the version */
- bump_version = true;
-
dirtied = true;
}
if (dirtied) {
/* write new quota settings to disk */
- rc = qmt_glb_write(env, th, lqe,
- bump_version ? LQUOTA_BUMP_VER : 0, &ver);
+ rc = qmt_glb_write(env, th, lqe, LQUOTA_BUMP_VER, &ver);
if (rc) {
/* restore initial quota settings */
qmt_restore(lqe, &qti->qti_restore);
GOTO(out, rc);
}
+
+ /* compute new qunit value now that we have modified the quota
+ * settings */
+ qmt_adjust_qunit(env, lqe);
+
+ /* clear/set edquot flag as needed */
+ qmt_adjust_edquot(lqe, now);
}
EXIT;
out:
if (th != NULL && !IS_ERR(th))
dt_trans_stop(env, qmt->qmt_child, th);
- if (rc == 0 && bump_version)
+ if (rc == 0 && dirtied)
qmt_glb_lock_notify(env, lqe, ver);
return rc;
switch (oqctl->qc_cmd) {
case Q_GETINFO: /* read grace times */
+ /* Global grace time is stored in quota settings of ID 0. */
+ id->qid_uid = 0;
+
/* read inode grace time */
- rc = qmt_getinfo(env, qmt, 0, LQUOTA_RES_MD, oqctl->qc_type,
- &oqctl->qc_dqinfo.dqi_igrace);
+ rc = qmt_get(env, qmt, 0, LQUOTA_RES_MD, oqctl->qc_type, id,
+ NULL, NULL, &oqctl->qc_dqinfo.dqi_igrace);
if (rc)
break;
/* read block grace time */
- rc = qmt_getinfo(env, qmt, 0, LQUOTA_RES_DT, oqctl->qc_type,
- &oqctl->qc_dqinfo.dqi_bgrace);
+ rc = qmt_get(env, qmt, 0, LQUOTA_RES_DT, oqctl->qc_type, id,
+ NULL, NULL, &oqctl->qc_dqinfo.dqi_bgrace);
break;
case Q_SETINFO: /* modify grace times */
/* 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_setinfo(env, qmt, 0, LQUOTA_RES_MD,
- oqctl->qc_type,
- oqctl->qc_dqinfo.dqi_igrace);
+ rc = qmt_set(env, qmt, 0, LQUOTA_RES_MD, oqctl->qc_type,
+ id, 0, 0, oqctl->qc_dqinfo.dqi_igrace,
+ QIF_TIMES);
if (rc)
break;
}
if ((dqb->dqb_valid & QIF_BTIME) != 0)
/* set block grace time */
- rc = qmt_setinfo(env, qmt, 0, LQUOTA_RES_DT,
- oqctl->qc_type,
- oqctl->qc_dqinfo.dqi_bgrace);
+ rc = qmt_set(env, qmt, 0, LQUOTA_RES_DT, oqctl->qc_type,
+ id, 0, 0, oqctl->qc_dqinfo.dqi_bgrace,
+ QIF_TIMES);
break;
case Q_GETQUOTA: /* consult quota limit */
id->qid_uid = oqctl->qc_id;
/* look-up inode quota settings */
- rc = qmt_getquota(env, qmt, 0, LQUOTA_RES_MD, oqctl->qc_type,
- id, &dqb->dqb_ihardlimit,
- &dqb->dqb_isoftlimit, &dqb->dqb_itime);
+ rc = qmt_get(env, qmt, 0, LQUOTA_RES_MD, oqctl->qc_type, id,
+ &dqb->dqb_ihardlimit, &dqb->dqb_isoftlimit,
+ &dqb->dqb_itime);
if (rc)
break;
dqb->dqb_curinodes = 0;
/* look-up block quota settings */
- rc = qmt_getquota(env, qmt, 0, LQUOTA_RES_DT, oqctl->qc_type,
- id, &dqb->dqb_bhardlimit,
- &dqb->dqb_bsoftlimit, &dqb->dqb_btime);
+ rc = qmt_get(env, qmt, 0, LQUOTA_RES_DT, oqctl->qc_type, id,
+ &dqb->dqb_bhardlimit, &dqb->dqb_bsoftlimit,
+ &dqb->dqb_btime);
if (rc)
break;
if ((dqb->dqb_valid & QIF_IFLAGS) != 0) {
/* update inode quota settings */
- rc = qmt_setquota(env, qmt, 0, LQUOTA_RES_MD,
- oqctl->qc_type, id,
- dqb->dqb_ihardlimit,
- dqb->dqb_isoftlimit, dqb->dqb_itime,
- dqb->dqb_valid & QIF_IFLAGS);
+ rc = qmt_set(env, qmt, 0, LQUOTA_RES_MD, oqctl->qc_type,
+ id, dqb->dqb_ihardlimit,
+ dqb->dqb_isoftlimit, dqb->dqb_itime,
+ dqb->dqb_valid & QIF_IFLAGS);
if (rc)
break;
}
if ((dqb->dqb_valid & QIF_BFLAGS) != 0)
/* update block quota settings */
- rc = qmt_setquota(env, qmt, 0, LQUOTA_RES_DT,
- oqctl->qc_type, id,
- dqb->dqb_bhardlimit,
- dqb->dqb_bsoftlimit, dqb->dqb_btime,
- dqb->dqb_valid & QIF_BFLAGS);
+ rc = qmt_set(env, qmt, 0, LQUOTA_RES_DT, oqctl->qc_type,
+ id, dqb->dqb_bhardlimit,
+ dqb->dqb_bsoftlimit, dqb->dqb_btime,
+ dqb->dqb_valid & QIF_BFLAGS);
break;
case Q_QUOTAON:
}
/*
+ * Helper function to handle quota request from slave.
+ *
+ * \param env - is the environment passed by the caller
+ * \param lqe - is the lquota_entry subject to the quota request
+ * \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 lquota_entry *lqe,
+ struct qmt_device *qmt, struct obd_uuid *uuid, __u32 qb_flags,
+ __u64 qb_count, __u64 qb_usage, struct quota_body *repbody)
+{
+ struct qmt_thread_info *qti = qmt_info(env);
+ __u64 now, count;
+ struct dt_object *slv_obj = NULL;
+ __u64 slv_granted, slv_granted_bck;
+ struct thandle *th = NULL;
+ int rc, ret;
+ 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);
+
+ /* 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, lqe, slv_obj, &qti->qti_restore);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ lqe_write_lock(lqe);
+ LQUOTA_DEBUG(lqe, "dqacq starts uuid:%s flags:0x%x wanted:"LPU64
+ " usage:"LPU64, 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(env, lqe);
+
+ /* 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, 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 = (__u64)cfs_time_current_sec();
+
+ if (req_is_rel(qb_flags)) {
+ /* Slave would like to release quota space */
+ if (slv_granted < qb_count ||
+ lqe->lqe_granted < qb_count) {
+ /* can't release more than granted */
+ LQUOTA_ERROR(lqe, "Release too much! uuid:%s release:"
+ LPU64" granted:"LPU64", total:"LPU64,
+ 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(lqe, 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(lqe, slv_granted, repbody->qb_count);
+ }
+
+ if (!req_is_acq(qb_flags) && !req_is_preacq(qb_flags))
+ GOTO(out_write, rc = 0);
+
+ qmt_adjust_edquot(lqe, now);
+ if (lqe->lqe_edquot)
+ /* no hope to claim further space back */
+ GOTO(out_write, rc = -EDQUOT);
+
+ if (qmt_space_exhausted(lqe, 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 >= lqe->lqe_qunit)
+ /* slave already own the maximum it should */
+ GOTO(out_write, rc = 0);
+
+ count = qmt_alloc_expand(lqe, slv_granted, qb_count);
+ if (count == 0)
+ GOTO(out_write, rc = -EDQUOT);
+
+ repbody->qb_count += count;
+ QMT_GRANT(lqe, slv_granted, count);
+ GOTO(out_write, rc = 0);
+ }
+
+ /* processing acquire request with clients waiting */
+ if (lqe->lqe_hardlimit != 0 &&
+ lqe->lqe_granted + qb_count > lqe->lqe_hardlimit) {
+ /* cannot grant as much as asked, but can still afford to grant
+ * some quota space back */
+ count = lqe->lqe_hardlimit - lqe->lqe_granted;
+ repbody->qb_count += count;
+ QMT_GRANT(lqe, slv_granted, count);
+ GOTO(out_write, rc = 0);
+ }
+
+ /* Whouhou! we can satisfy the slave request! */
+ repbody->qb_count += qb_count;
+ QMT_GRANT(lqe, slv_granted, qb_count);
+
+ /* Try to expand the acquired count for DQACQ */
+ count = qmt_alloc_expand(lqe, slv_granted, 0);
+ if (count != 0) {
+ /* can even grant more than asked, it is like xmas ... */
+ repbody->qb_count += count;
+ QMT_GRANT(lqe, 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 */
+ 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;
+ }
+
+ /* 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(lqe, &qti->qti_restore);
+ /* reset qb_count */
+ repbody->qb_count = 0;
+ GOTO(out_locked, rc = ret);
+ }
+
+ /* Update global index, no version bump needed */
+ ret = qmt_glb_write(env, th, lqe, 0, NULL);
+ if (ret) {
+ rc = ret;
+ /* restore initial quota settings */
+ qmt_restore(lqe, &qti->qti_restore);
+ /* 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(lqe, now);
+ GOTO(out_locked, rc);
+ }
+
+ /* Total granted has been changed, let's try to adjust the qunit
+ * size according to the total granted & limits. */
+ qmt_adjust_qunit(env, lqe);
+
+ /* clear/set edquot flag and notify slaves via glimpse if needed */
+ qmt_adjust_edquot(lqe, now);
+out_locked:
+ LQUOTA_DEBUG(lqe, "dqacq ends count:"LPU64" ver:"LPU64" rc:%d",
+ repbody->qb_count, repbody->qb_slv_ver, rc);
+ lqe_write_unlock(lqe);
+out:
+ if (th != NULL && !IS_ERR(th))
+ dt_trans_stop(env, qmt->qmt_child, th);
+
+ if (slv_obj != NULL && !IS_ERR(slv_obj))
+ lu_object_put(env, &slv_obj->do_lu);
+
+ 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);
+}
+
+/*
* Handle quota request from slave.
*
* \param env - is the environment passed by the caller
static int qmt_dqacq(const struct lu_env *env, struct lu_device *ld,
struct ptlrpc_request *req)
{
+ struct qmt_device *qmt = lu2qmt_dev(ld);
struct quota_body *qbody, *repbody;
+ struct obd_uuid *uuid;
+ struct ldlm_lock *lock;
+ struct lquota_entry *lqe;
+ int pool_id, pool_type, qtype;
+ int rc;
ENTRY;
qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
if (repbody == NULL)
RETURN(err_serious(-EFAULT));
- /* XXX: to be implemented */
+ /* verify if global lock is stale */
+ if (!lustre_handle_is_used(&qbody->qb_glb_lockh))
+ RETURN(-ENOLCK);
- RETURN(0);
+ lock = ldlm_handle2lock(&qbody->qb_glb_lockh);
+ if (lock == NULL)
+ RETURN(-ENOLCK);
+ LDLM_LOCK_PUT(lock);
+
+ uuid = &req->rq_export->exp_client_uuid;
+
+ 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 ((lock->l_flags & LDLM_FL_AST_SENT) != 0) {
+ struct ptlrpc_service_part *svc;
+ unsigned int timeout;
+
+ svc = req->rq_rqbd->rqbd_svcpt;
+ timeout = at_est2timeout(at_get(&svc->scp_at_estimate));
+ timeout = max(timeout, ldlm_timeout);
+
+ /* lock is being cancelled, prolong timeout */
+ ldlm_refresh_waiting_lock(lock, timeout);
+ }
+ LDLM_LOCK_PUT(lock);
+ }
+
+ /* extract pool & quota information from global index FID packed in the
+ * request */
+ rc = lquota_extract_fid(&qbody->qb_fid, &pool_id, &pool_type, &qtype);
+ if (rc)
+ RETURN(-EINVAL);
+
+ /* Find the quota entry associated with the quota id */
+ lqe = qmt_pool_lqe_lookup(env, qmt, pool_id, pool_type, qtype,
+ &qbody->qb_id);
+ if (IS_ERR(lqe))
+ RETURN(PTR_ERR(lqe));
+
+ /* process quota request */
+ rc = qmt_dqacq0(env, lqe, 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 = lqe->lqe_qunit;
+ lqe_putref(lqe);
+ 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