4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2012, 2017, Intel Corporation.
25 * Use is subject to license terms.
27 * Author: Johann Lombardi <johann.lombardi@intel.com>
28 * Author: Niu Yawei <yawei.niu@intel.com>
31 #define DEBUG_SUBSYSTEM S_LQUOTA
33 #include <obd_class.h>
34 #include "qmt_internal.h"
37 * Retrieve quota settings for a given identifier.
39 * \param env - is the environment passed by the caller
40 * \param qmt - is the quota master target
41 * \param restype - is the pool type, either block (i.e. LQUOTA_RES_DT) or inode
42 * (i.e. LQUOTA_RES_MD)
43 * \param qtype - is the quota type
44 * \param id - is the quota indentifier for which we want to acces quota
46 * \param hard - is the output variable where to copy the hard limit
47 * \param soft - is the output variable where to copy the soft limit
48 * \param time - is the output variable where to copy the grace time
50 static int qmt_get(const struct lu_env *env, struct qmt_device *qmt,
51 __u8 restype, __u8 qtype, union lquota_id *id,
52 __u64 *hard, __u64 *soft, __u64 *time, bool is_default,
55 struct lquota_entry *lqe;
58 LASSERT(!is_default || id->qid_uid == 0);
59 if (pool_name && !strnlen(pool_name, LOV_MAXPOOLNAME))
62 /* look-up lqe structure containing quota settings */
63 lqe = qmt_pool_lqe_lookup(env, qmt, restype, qtype, id, pool_name);
67 /* copy quota settings */
69 LQUOTA_DEBUG(lqe, "fetch settings");
71 *hard = lqe->lqe_hardlimit;
73 *soft = lqe->lqe_softlimit;
75 *time = lqe->lqe_gracetime;
76 if (lqe->lqe_is_default)
77 *time |= (__u64)LQUOTA_FLAG_DEFAULT <<
86 struct qmt_entry_iter_data {
87 const struct lu_env *qeid_env;
88 struct qmt_device *qeid_qmt;
91 static int qmt_entry_iter_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
92 struct hlist_node *hnode, void *d)
94 struct qmt_entry_iter_data *iter = (struct qmt_entry_iter_data *)d;
95 struct lquota_entry *lqe;
97 lqe = hlist_entry(hnode, struct lquota_entry, lqe_hash);
98 LASSERT(atomic_read(&lqe->lqe_ref) > 0);
100 if (lqe->lqe_id.qid_uid == 0 || !lqe->lqe_is_default)
103 return qmt_set_with_lqe(iter->qeid_env, iter->qeid_qmt, lqe, 0, 0, 0, 0,
107 static void qmt_set_id_notify(const struct lu_env *env, struct qmt_device *qmt,
108 struct lquota_entry *lqe)
110 struct lquota_entry *lqe_gl;
113 lqe_gl = lqe->lqe_is_global ? lqe : NULL;
114 rc = qmt_pool_lqes_lookup_spec(env, qmt, lqe_rtype(lqe),
115 lqe_qtype(lqe), &lqe->lqe_id);
116 if (!qti_lqes_cnt(env))
119 if (!lqe_gl && qti_lqes_glbl(env)->lqe_is_global)
120 lqe_gl = qti_lqes_glbl(env);
125 if (lqe_gl->lqe_glbl_data)
126 qmt_seed_glbe(env, lqe_gl->lqe_glbl_data);
127 /* Even if slaves haven't enqueued quota lock yet,
128 * it is needed to set lqe_revoke_time in qmt_id_lock_glimpse
129 * in case of reaching qpi_least_qunit */
130 qmt_id_lock_notify(qmt, lqe_gl);
136 * Update quota settings for a given lqe.
138 * \param env - is the environment passed by the caller
139 * \param qmt - is the quota master target
140 * \param lqe - is the lquota_entry for which we want to modify quota
142 * \param hard - is the new hard limit
143 * \param soft - is the new soft limit
144 * \param time - is the new grace time
145 * \param valid - is the list of settings to change
146 * \param is_default - true for default quota setting
147 * \param is_updated - true if the lqe is updated and no need to write back
150 int qmt_set_with_lqe(const struct lu_env *env, struct qmt_device *qmt,
151 struct lquota_entry *lqe, __u64 hard, __u64 soft,
152 __u64 time, __u32 valid, bool is_default, bool is_updated)
154 struct thandle *th = NULL;
157 bool dirtied = false;
159 bool need_id_notify = false;
162 /* need to write back to global quota file? */
164 /* By default we should have here only 1 lqe,
165 * so no allocations should be done. */
166 if (qti_lqes_restore_init(env))
167 GOTO(out_nolock, rc = -ENOMEM);
168 /* allocate & start transaction with enough credits to update
169 * quota settings in the global index file */
170 th = qmt_trans_start(env, lqe);
172 GOTO(out_nolock, rc = PTR_ERR(th));
175 now = ktime_get_real_seconds();
179 "changing quota settings valid:%x hard:%llu soft:%llu time:%llu",
180 valid, hard, soft, time);
182 if (is_default && lqe->lqe_id.qid_uid != 0) {
183 LQUOTA_DEBUG(lqe, "set qid %llu to use default quota setting",
184 lqe->lqe_id.qid_uid);
186 qmt_lqe_set_default(env, lqe->lqe_site->lqs_parent, lqe, false);
190 if ((valid & QIF_TIMES) != 0 && lqe->lqe_gracetime != time) {
191 /* change time settings */
192 lqe->lqe_gracetime = time;
196 if ((valid & QIF_LIMITS) != 0 &&
197 (lqe->lqe_hardlimit != hard || lqe->lqe_softlimit != soft)) {
198 rc = qmt_validate_limits(lqe, hard, soft);
202 /* change quota limits */
203 lqe->lqe_hardlimit = hard;
204 lqe->lqe_softlimit = soft;
207 /* recompute qunit in case it was never initialized */
208 if (qmt_revalidate(env, lqe))
209 need_id_notify = true;
211 /* clear grace time */
212 if (lqe->lqe_softlimit == 0 ||
213 lqe->lqe_granted <= lqe->lqe_softlimit)
214 /* no soft limit or below soft limit, let's clear grace
216 lqe->lqe_gracetime = 0;
217 else if ((valid & QIF_TIMES) == 0)
218 /* set grace only if user hasn't provided his own */
219 lqe->lqe_gracetime = now + qmt_lqe_grace(lqe);
221 /* change enforced status based on new parameters */
222 if (lqe->lqe_id.qid_uid == 0 || (lqe->lqe_hardlimit == 0 &&
223 lqe->lqe_softlimit == 0)) {
224 if (lqe->lqe_enforced) {
225 lqe->lqe_enforced = false;
226 /* Clear qunit and edquot as lqe_adjust_edquot
227 * does not handle not enforced lqes */
230 need_id_notify = true;
233 lqe->lqe_enforced = true;
239 if (!is_default && lqe->lqe_is_default) {
240 LQUOTA_DEBUG(lqe, "the qid %llu has been set quota"
241 " explicitly, clear the default flag",
242 lqe->lqe_id.qid_uid);
244 qmt_lqe_clear_default(lqe);
250 /* write new quota settings to disk */
251 rc = qmt_glb_write(env, th, lqe, LQUOTA_BUMP_VER, &ver);
253 /* restore initial quota settings */
254 qmt_restore(lqe, &qti_lqes_rstr(env)[0]);
258 ver = dt_version_get(env, LQE_GLB_OBJ(lqe));
261 /* compute new qunit value now that we have modified the quota
262 * settings or clear/set edquot flag if needed */
263 need_id_notify |= qmt_adjust_qunit(env, lqe);
264 need_id_notify |= qmt_adjust_edquot(lqe, now);
268 lqe_write_unlock(lqe);
272 if (th != NULL && !IS_ERR(th))
273 dt_trans_stop(env, qmt->qmt_child, th);
274 qti_lqes_restore_fini(env);
277 if (rc == 0 && dirtied) {
278 qmt_glb_lock_notify(env, lqe, ver);
279 if (lqe->lqe_id.qid_uid == 0) {
280 struct qmt_entry_iter_data iter_data;
282 LQUOTA_DEBUG(lqe, "notify all lqe with default quota");
283 iter_data.qeid_env = env;
284 iter_data.qeid_qmt = qmt;
285 cfs_hash_for_each(lqe->lqe_site->lqs_hash,
286 qmt_entry_iter_cb, &iter_data);
287 /* Always notify slaves with default values. Don't
288 * care about overhead as will be sent only not changed
289 * values(see qmt_id_lock_cb for details).*/
290 need_id_notify = true;
292 /* qti_lqes_inited > 0 means we came here from another
293 * qmt_pool_lqes_lookup(qmt_dqacq, intent_policy ...). Thus
294 * we can't init and add new lqes to don't overwrite already
297 if (!qti_lqes_inited(env) && need_id_notify)
298 qmt_set_id_notify(env, qmt, lqe);
305 * Update quota settings for a given identifier.
307 * \param env - is the environment passed by the caller
308 * \param qmt - is the quota master target
309 * \param restype - is the pool type, either block (i.e. LQUOTA_RES_DT) or
310 * inode (i.e. LQUOTA_RES_MD)
311 * \param qtype - is the quota type
312 * \param id - is the quota indentifier for which we want to modify
314 * \param hard - is the new hard limit
315 * \param soft - is the new soft limit
316 * \param time - is the new grace time
317 * \param valid - is the list of settings to change
318 * \param is_default - true for default quota setting
319 * \param is_updated - true if the lqe is updated and no need to write back
321 static int qmt_set(const struct lu_env *env, struct qmt_device *qmt,
322 __u8 restype, __u8 qtype, union lquota_id *id,
323 __u64 hard, __u64 soft, __u64 time, __u32 valid,
324 bool is_default, bool is_updated, char *pool_name)
326 struct lquota_entry *lqe;
330 if (pool_name && !strnlen(pool_name, LOV_MAXPOOLNAME))
333 /* look-up quota entry associated with this ID */
334 lqe = qmt_pool_lqe_lookup(env, qmt, restype, qtype, id, pool_name);
336 RETURN(PTR_ERR(lqe));
338 rc = qmt_set_with_lqe(env, qmt, lqe, hard, soft, time, valid,
339 is_default, is_updated);
345 * Handle quotactl request.
347 * \param env - is the environment passed by the caller
348 * \param ld - is the lu device associated with the qmt
349 * \param oqctl - is the quotactl request
351 static int qmt_quotactl(const struct lu_env *env, struct lu_device *ld,
352 struct obd_quotactl *oqctl)
354 struct qmt_thread_info *qti = qmt_info(env);
355 union lquota_id *id = &qti->qti_id;
356 struct qmt_device *qmt = lu2qmt_dev(ld);
357 struct obd_dqblk *dqb = &oqctl->qc_dqblk;
360 bool is_default = false;
363 LASSERT(qmt != NULL);
365 if (oqctl->qc_type >= LL_MAXQUOTAS)
366 /* invalid quota type */
369 poolname = LUSTRE_Q_CMD_IS_POOL(oqctl->qc_cmd) ?
370 oqctl->qc_poolname : NULL;
372 switch (oqctl->qc_cmd) {
374 case Q_GETINFO: /* read grace times */
375 case LUSTRE_Q_GETINFOPOOL:
376 /* Global grace time is stored in quota settings of ID 0. */
379 /* read inode grace time */
380 rc = qmt_get(env, qmt, LQUOTA_RES_MD, oqctl->qc_type, id, NULL,
381 NULL, &oqctl->qc_dqinfo.dqi_igrace,
383 /* There could be no MD pool, so try to find DT pool */
384 if (rc && rc != -ENOENT)
387 /* read block grace time */
388 rc = qmt_get(env, qmt, LQUOTA_RES_DT, oqctl->qc_type, id, NULL,
389 NULL, &oqctl->qc_dqinfo.dqi_bgrace,
393 case Q_SETINFO: /* modify grace times */
394 case LUSTRE_Q_SETINFOPOOL:
395 /* setinfo should be using dqi->dqi_valid, but lfs incorrectly
396 * sets the valid flags in dqb->dqb_valid instead, try to live
399 /* Global grace time is stored in quota settings of ID 0. */
402 if ((dqb->dqb_valid & QIF_ITIME) != 0) {
403 /* set inode grace time */
404 rc = qmt_set(env, qmt, LQUOTA_RES_MD, oqctl->qc_type,
405 id, 0, 0, oqctl->qc_dqinfo.dqi_igrace,
406 QIF_TIMES, false, false,
412 if ((dqb->dqb_valid & QIF_BTIME) != 0)
413 /* set block grace time */
414 rc = qmt_set(env, qmt, LQUOTA_RES_DT, oqctl->qc_type,
415 id, 0, 0, oqctl->qc_dqinfo.dqi_bgrace,
416 QIF_TIMES, false, false,
420 case LUSTRE_Q_GETDEFAULT:
421 case LUSTRE_Q_GETDEFAULT_POOL:
425 case Q_GETQUOTA: /* consult quota limit */
426 case LUSTRE_Q_GETQUOTAPOOL:
427 /* extract quota ID from quotactl request */
428 id->qid_uid = oqctl->qc_id;
430 /* look-up inode quota settings */
431 rc = qmt_get(env, qmt, LQUOTA_RES_MD, oqctl->qc_type, id,
432 &dqb->dqb_ihardlimit, &dqb->dqb_isoftlimit,
433 &dqb->dqb_itime, is_default, poolname);
434 /* There could be no MD pool, so try to find DT pool */
435 if (rc && rc != -ENOENT)
438 dqb->dqb_valid |= QIF_ILIMITS | QIF_ITIME;
440 /* master isn't aware of actual inode usage */
441 dqb->dqb_curinodes = 0;
443 /* look-up block quota settings */
444 rc = qmt_get(env, qmt, LQUOTA_RES_DT, oqctl->qc_type, id,
445 &dqb->dqb_bhardlimit, &dqb->dqb_bsoftlimit,
446 &dqb->dqb_btime, is_default, poolname);
450 dqb->dqb_valid |= QIF_BLIMITS | QIF_BTIME;
451 /* master doesn't know the actual block usage */
452 dqb->dqb_curspace = 0;
455 case LUSTRE_Q_SETDEFAULT:
456 case LUSTRE_Q_SETDEFAULT_POOL:
460 case Q_SETQUOTA: /* change quota limits */
461 case LUSTRE_Q_SETQUOTAPOOL:
462 /* extract quota ID from quotactl request */
463 id->qid_uid = oqctl->qc_id;
465 if ((dqb->dqb_valid & QIF_IFLAGS) != 0) {
466 /* update inode quota settings */
467 rc = qmt_set(env, qmt, LQUOTA_RES_MD, oqctl->qc_type,
468 id, dqb->dqb_ihardlimit,
469 dqb->dqb_isoftlimit, dqb->dqb_itime,
470 dqb->dqb_valid & QIF_IFLAGS, is_default,
476 if ((dqb->dqb_valid & QIF_BFLAGS) != 0)
477 /* update block quota settings */
478 rc = qmt_set(env, qmt, LQUOTA_RES_DT, oqctl->qc_type,
479 id, dqb->dqb_bhardlimit,
480 dqb->dqb_bsoftlimit, dqb->dqb_btime,
481 dqb->dqb_valid & QIF_BFLAGS, is_default,
486 CERROR("%s: unsupported quotactl command: %d\n",
487 qmt->qmt_svname, oqctl->qc_cmd);
495 void qmt_grant_lqes(const struct lu_env *env, __u64 *slv, __u64 cnt)
499 for (i = 0; i < qti_lqes_cnt(env); i++)
500 qti_lqe_granted(env, i) += cnt;
505 static inline bool qmt_lqes_can_rel(const struct lu_env *env, __u64 cnt)
507 bool can_release = true;
510 for (i = 0; i < qti_lqes_cnt(env); i++) {
511 if (cnt > qti_lqe_granted(env, i)) {
512 LQUOTA_ERROR(qti_lqes(env)[i],
513 "Can't release %llu that is larger than lqe_granted.\n",
521 static inline void qmt_rel_lqes(const struct lu_env *env, __u64 *slv, __u64 cnt)
525 for (i = 0; i < qti_lqes_cnt(env); i++)
526 qti_lqe_granted(env, i) -= cnt;
531 static inline bool qmt_lqes_cannot_grant(const struct lu_env *env, __u64 cnt)
533 bool cannot_grant = false;
536 for (i = 0; i < qti_lqes_cnt(env); i++) {
537 if (qti_lqe_hard(env, i) != 0 &&
538 qti_lqe_granted(env, i) + cnt > qti_lqe_hard(env, i)) {
546 static inline __u64 qmt_lqes_grant_some_quota(const struct lu_env *env)
548 __u64 min_count, tmp;
552 for (i = 0, min_count = 0; i < qti_lqes_cnt(env); i++) {
553 if (!qti_lqes(env)[i]->lqe_enforced &&
554 !qti_lqes(env)[i]->lqe_is_global)
557 tmp = qti_lqe_hard(env, i) - qti_lqe_granted(env, i);
559 min_count = tmp < min_count ? tmp : min_count;
568 static inline __u64 qmt_lqes_alloc_expand(const struct lu_env *env,
569 __u64 slv_granted, __u64 spare)
571 __u64 min_count, tmp;
575 for (i = 0, min_count = 0; i < qti_lqes_cnt(env); i++) {
576 /* Don't take into account not enforced lqes that belong
577 * to non global pool. These lqes present in array to
578 * support actual lqe_granted even for lqes without limits. */
579 if (!qti_lqes(env)[i]->lqe_enforced &&
580 !qti_lqes(env)[i]->lqe_is_global)
583 tmp = qmt_alloc_expand(qti_lqes(env)[i], slv_granted, spare);
585 min_count = tmp < min_count ? tmp : min_count;
594 static inline void qmt_lqes_tune_grace(const struct lu_env *env, __u64 now)
598 for (i = 0; i < qti_lqes_cnt(env); i++) {
599 struct lquota_entry *lqe;
601 lqe = qti_lqes(env)[i];
602 if (lqe->lqe_softlimit != 0) {
603 if (lqe->lqe_granted > lqe->lqe_softlimit &&
604 lqe->lqe_gracetime == 0) {
605 /* First time over soft limit, let's start grace
607 lqe->lqe_gracetime = now + qmt_lqe_grace(lqe);
608 } else if (lqe->lqe_granted <= lqe->lqe_softlimit &&
609 lqe->lqe_gracetime != 0) {
610 /* Clear grace timer */
611 lqe->lqe_gracetime = 0;
618 * Helper function to handle quota request from slave.
620 * \param env - is the environment passed by the caller
621 * \param qmt - is the master device
622 * \param uuid - is the uuid associated with the slave
623 * \param qb_flags - are the quota request flags as packed in the quota_body
624 * \param qb_count - is the amount of quota space the slave wants to
626 * \param qb_usage - is the current space usage on the slave
627 * \param repbody - is the quota_body of reply
629 * \retval 0 : success
630 * \retval -EDQUOT : out of quota
631 * -EINPROGRESS : inform client to retry write/create
632 * -ve : other appropriate errors
634 int qmt_dqacq0(const struct lu_env *env, struct qmt_device *qmt,
635 struct obd_uuid *uuid, __u32 qb_flags, __u64 qb_count,
636 __u64 qb_usage, struct quota_body *repbody)
639 struct dt_object *slv_obj = NULL;
640 __u64 slv_granted, slv_granted_bck;
641 struct thandle *th = NULL;
643 struct lquota_entry *lqe = qti_lqes_glbl(env);
646 LASSERT(uuid != NULL);
648 /* initialize reply */
649 memset(repbody, 0, sizeof(*repbody));
650 memcpy(&repbody->qb_id, &lqe->lqe_id, sizeof(repbody->qb_id));
652 if (OBD_FAIL_CHECK(OBD_FAIL_QUOTA_RECOVERABLE_ERR))
653 RETURN(-cfs_fail_val);
655 if (OBD_FAIL_CHECK(OBD_FAIL_QUOTA_PREACQ) &&
656 (req_is_preacq(qb_flags) || req_is_rel(qb_flags)))
659 if (qti_lqes_restore_init(env))
662 /* look-up index file associated with acquiring slave */
663 slv_obj = lquota_disk_slv_find(env, qmt->qmt_child, LQE_ROOT(lqe),
664 lu_object_fid(&LQE_GLB_OBJ(lqe)->do_lu),
667 GOTO(out, rc = PTR_ERR(slv_obj));
669 /* pack slave fid in reply just for sanity check */
670 memcpy(&repbody->qb_slv_fid, lu_object_fid(&slv_obj->do_lu),
671 sizeof(struct lu_fid));
673 /* allocate & start transaction with enough credits to update
674 * global & slave indexes */
675 th = qmt_trans_start_with_slv(env, NULL, slv_obj, false);
677 GOTO(out, rc = PTR_ERR(th));
679 qti_lqes_write_lock(env);
681 LQUOTA_DEBUG_LQES(env, "dqacq starts uuid:%s flags:0x%x wanted:%llu"
682 " usage:%llu", obd_uuid2str(uuid), qb_flags, qb_count,
685 /* Legal race, limits have been removed on master, but slave didn't
686 * receive the change yet. Just return EINPROGRESS until the slave gets
688 if (!lqe->lqe_enforced && !req_is_rel(qb_flags))
689 GOTO(out_locked, rc = -ESRCH);
691 /* recompute qunit in case it was never initialized */
692 qmt_revalidate_lqes(env, qmt, qb_flags);
694 /* slave just wants to acquire per-ID lock */
695 if (req_is_acq(qb_flags) && qb_count == 0)
696 GOTO(out_locked, rc = 0);
698 /* fetch how much quota space is already granted to this slave */
699 rc = qmt_slv_read(env, &lqe->lqe_id, slv_obj, &slv_granted);
701 LQUOTA_ERROR(lqe, "Failed to get granted for slave %s, rc=%d",
702 obd_uuid2str(uuid), rc);
703 GOTO(out_locked, rc);
705 /* recall how much space this slave currently owns in order to restore
706 * it in case of failure */
707 slv_granted_bck = slv_granted;
709 /* record current time for soft limit & grace time management */
710 now = ktime_get_real_seconds();
712 if (req_is_rel(qb_flags)) {
713 /* Slave would like to release quota space */
714 if (slv_granted < qb_count ||
715 !qmt_lqes_can_rel(env, qb_count)) {
716 /* can't release more than granted */
717 LQUOTA_ERROR_LQES(env,
718 "Release too much! uuid:%s release: %llu granted:%llu, total:%llu",
719 obd_uuid2str(uuid), qb_count,
720 slv_granted, lqe->lqe_granted);
721 GOTO(out_locked, rc = -EINVAL);
724 repbody->qb_count = qb_count;
725 /* put released space back to global pool */
726 qmt_rel_lqes(env, &slv_granted, qb_count);
727 GOTO(out_write, rc = 0);
730 if (req_has_rep(qb_flags) && slv_granted < qb_usage) {
731 /* Slave is reporting space usage in quota request and it turns
732 * out to be using more quota space than owned, so we adjust
733 * granted space regardless of the current state of affairs */
734 repbody->qb_count = qb_usage - slv_granted;
735 qmt_grant_lqes(env, &slv_granted, repbody->qb_count);
738 if (!req_is_acq(qb_flags) && !req_is_preacq(qb_flags))
739 GOTO(out_write, rc = 0);
741 qmt_adjust_edquot_notify(env, qmt, now, qb_flags);
742 if (qti_lqes_edquot(env))
743 /* no hope to claim further space back */
744 GOTO(out_write, rc = -EDQUOT);
746 if (qmt_space_exhausted_lqes(env, now)) {
747 /* might have some free space once rebalancing is completed */
748 rc = req_is_acq(qb_flags) ? -EINPROGRESS : -EDQUOT;
752 if (req_is_preacq(qb_flags)) {
753 /* slave would like to pre-acquire quota space. To do so, it
754 * reports in qb_count how much spare quota space it owns and we
755 * can grant back quota space which is consistent with qunit
757 if (qb_count >= qti_lqes_min_qunit(env))
758 /* slave already own the maximum it should */
759 GOTO(out_write, rc = 0);
761 count = qmt_lqes_alloc_expand(env, slv_granted, qb_count);
763 GOTO(out_write, rc = -EDQUOT);
765 repbody->qb_count += count;
766 qmt_grant_lqes(env, &slv_granted, count);
767 GOTO(out_write, rc = 0);
770 /* processing acquire request with clients waiting */
771 if (qmt_lqes_cannot_grant(env, qb_count)) {
772 /* cannot grant as much as asked, but can still afford to grant
773 * some quota space back */
774 count = qmt_lqes_grant_some_quota(env);
775 repbody->qb_count += count;
776 qmt_grant_lqes(env, &slv_granted, count);
777 GOTO(out_write, rc = 0);
780 /* Whouhou! we can satisfy the slave request! */
781 repbody->qb_count += qb_count;
782 qmt_grant_lqes(env, &slv_granted, qb_count);
784 /* Try to expand the acquired count for DQACQ */
785 count = qmt_lqes_alloc_expand(env, slv_granted, 0);
787 /* can even grant more than asked, it is like xmas ... */
788 repbody->qb_count += count;
789 qmt_grant_lqes(env, &slv_granted, count);
790 GOTO(out_write, rc = 0);
793 GOTO(out_write, rc = 0);
795 if (repbody->qb_count == 0)
796 GOTO(out_locked, rc);
798 /* start/stop grace timer if required */
799 qmt_lqes_tune_grace(env, now);
801 /* Update slave index first since it is easier to roll back */
802 ret = qmt_slv_write(env, th, lqe, slv_obj, LQUOTA_BUMP_VER,
803 &repbody->qb_slv_ver, slv_granted);
805 /* restore initial quota settings */
806 qmt_restore_lqes(env);
808 repbody->qb_count = 0;
809 GOTO(out_locked, rc = ret);
812 /* Update global index, no version bump needed */
813 ret = qmt_glb_write_lqes(env, th, 0, NULL);
816 /* restore initial quota settings */
817 qmt_restore_lqes(env);
819 repbody->qb_count = 0;
821 /* restore previous granted value */
822 ret = qmt_slv_write(env, th, lqe, slv_obj, 0, NULL,
825 LQUOTA_ERROR(lqe, "failed to restore initial slave "
826 "value rc:%d ret%d", rc, ret);
829 qmt_adjust_edquot_notify(env, qmt, now, qb_flags);
830 GOTO(out_locked, rc);
833 /* Total granted has been changed, let's try to adjust the qunit
834 * size according to the total granted & limits. */
836 /* clear/set edquot flag and notify slaves via glimpse if needed */
837 qmt_adjust_and_notify(env, qmt, now, qb_flags);
839 LQUOTA_DEBUG_LQES(env, "dqacq ends count:%llu ver:%llu rc:%d",
840 repbody->qb_count, repbody->qb_slv_ver, rc);
841 qti_lqes_write_unlock(env);
843 qti_lqes_restore_fini(env);
845 if (th != NULL && !IS_ERR(th))
846 dt_trans_stop(env, qmt->qmt_child, th);
848 if (slv_obj != NULL && !IS_ERR(slv_obj))
849 dt_object_put(env, slv_obj);
851 if ((req_is_acq(qb_flags) || req_is_preacq(qb_flags)) &&
852 OBD_FAIL_CHECK(OBD_FAIL_QUOTA_EDQUOT)) {
853 /* introduce inconsistency between granted value in slave index
854 * and slave index copy of slave */
855 repbody->qb_count = 0;
863 * Extract index from uuid or quota index file name.
865 * \param[in] uuid uuid or quota index name(0x1020000-OST0001_UUID)
866 * \param[out] idx pointer to save index
868 * \retval slave type(QMT_STYPE_MDT or QMT_STYPE_OST)
869 * \retval -EINVAL wrong uuid
871 int qmt_uuid2idx(struct obd_uuid *uuid, int *idx)
873 char *uuid_str, *name, *dash;
876 uuid_str = (char *)uuid->uuid;
878 if (strnlen(uuid_str, UUID_MAX) >= UUID_MAX) {
879 CERROR("quota: UUID '%.*s' missing trailing NUL: rc = %d\n",
880 UUID_MAX, uuid_str, rc);
884 dash = strrchr(uuid_str, '-');
886 /* Going to get index from MDTXXXX/OSTXXXX. Thus uuid should
887 * have at least 8 bytes after '-': 3 for MDT/OST, 4 for index
888 * and 1 byte for null character. */
889 if (*dash != '-' || ((uuid_str + UUID_MAX - name) < 8)) {
890 CERROR("quota: wrong UUID format '%s': rc = %d\n",
895 rc = target_name2index(name, idx, NULL);
897 case LDD_F_SV_TYPE_MDT:
900 case LDD_F_SV_TYPE_OST:
904 CERROR("quota: wrong UUID type '%s': rc = %d\n", uuid_str, rc);
912 * Handle quota request from slave.
914 * \param env - is the environment passed by the caller
915 * \param ld - is the lu device associated with the qmt
916 * \param req - is the quota acquire request
918 static int qmt_dqacq(const struct lu_env *env, struct lu_device *ld,
919 struct ptlrpc_request *req)
921 struct qmt_device *qmt = lu2qmt_dev(ld);
922 struct quota_body *qbody, *repbody;
923 struct obd_uuid *uuid;
924 struct ldlm_lock *lock;
929 qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
931 RETURN(err_serious(-EPROTO));
933 repbody = req_capsule_server_get(&req->rq_pill, &RMF_QUOTA_BODY);
935 RETURN(err_serious(-EFAULT));
937 /* verify if global lock is stale */
938 if (!lustre_handle_is_used(&qbody->qb_glb_lockh))
941 lock = ldlm_handle2lock(&qbody->qb_glb_lockh);
946 uuid = &req->rq_export->exp_client_uuid;
947 stype = qmt_uuid2idx(uuid, &idx);
951 if (req_is_rel(qbody->qb_flags) + req_is_acq(qbody->qb_flags) +
952 req_is_preacq(qbody->qb_flags) > 1) {
953 CERROR("%s: malformed quota request with conflicting flags set "
954 "(%x) from slave %s\n", qmt->qmt_svname,
955 qbody->qb_flags, obd_uuid2str(uuid));
959 if (req_is_acq(qbody->qb_flags) || req_is_preacq(qbody->qb_flags)) {
960 /* acquire and pre-acquire should use a valid ID lock */
962 if (!lustre_handle_is_used(&qbody->qb_lockh))
965 lock = ldlm_handle2lock(&qbody->qb_lockh);
967 /* no lock associated with this handle */
970 LDLM_DEBUG(lock, "%sacquire request",
971 req_is_preacq(qbody->qb_flags) ? "pre" : "");
973 if (!obd_uuid_equals(&lock->l_export->exp_client_uuid, uuid)) {
974 /* sorry, no way to cheat ... */
979 if (ldlm_is_ast_sent(lock)) {
980 struct ptlrpc_service_part *svc;
983 svc = req->rq_rqbd->rqbd_svcpt;
984 timeout = at_est2timeout(at_get(&svc->scp_at_estimate));
985 timeout += (ldlm_bl_timeout(lock) >> 1);
987 /* lock is being cancelled, prolong timeout */
988 ldlm_refresh_waiting_lock(lock, timeout);
993 /* extract quota information from global index FID packed in the
995 rc = lquota_extract_fid(&qbody->qb_fid, &rtype, &qtype);
999 /* Find the quota entry associated with the quota id */
1000 rc = qmt_pool_lqes_lookup(env, qmt, rtype, stype, qtype,
1001 &qbody->qb_id, NULL, idx);
1005 rc = qmt_dqacq0(env, qmt, uuid, qbody->qb_flags,
1006 qbody->qb_count, qbody->qb_usage, repbody);
1008 if (lustre_handle_is_used(&qbody->qb_lockh))
1009 /* return current qunit value only to slaves owning an per-ID
1010 * quota lock. For enqueue, the qunit value will be returned in
1012 repbody->qb_qunit = qti_lqes_min_qunit(env);
1013 CDEBUG(D_QUOTA, "qmt_dqacq return qb_qunit %llu qb_count %llu\n",
1014 repbody->qb_qunit, repbody->qb_count);
1019 /* Vector of quota request handlers. This vector is used by the MDT to forward
1020 * requests to the quota master. */
1021 struct qmt_handlers qmt_hdls = {
1022 /* quota request handlers */
1023 .qmth_quotactl = qmt_quotactl,
1024 .qmth_dqacq = qmt_dqacq,
1027 .qmth_intent_policy = qmt_intent_policy,
1028 .qmth_lvbo_init = qmt_lvbo_init,
1029 .qmth_lvbo_update = qmt_lvbo_update,
1030 .qmth_lvbo_size = qmt_lvbo_size,
1031 .qmth_lvbo_fill = qmt_lvbo_fill,
1032 .qmth_lvbo_free = qmt_lvbo_free,
1034 EXPORT_SYMBOL(qmt_hdls);