1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/quota/quota_context.c
38 * Lustre Quota Context
40 * Author: Niu YaWei <niu@clusterfs.com>
44 # define EXPORT_SYMTAB
47 #define DEBUG_SUBSYSTEM S_LQUOTA
49 #include <linux/version.h>
51 #include <asm/unistd.h>
52 #include <linux/slab.h>
53 #include <linux/quotaops.h>
54 #include <linux/module.h>
55 #include <linux/init.h>
57 #include <obd_class.h>
58 #include <lustre_quota.h>
59 #include <lustre_fsfilt.h>
60 #include <class_hash.h>
61 #include <lprocfs_status.h>
62 #include "quota_internal.h"
64 #ifdef HAVE_QUOTA_SUPPORT
66 static lustre_hash_ops_t lqs_hash_ops;
68 unsigned long default_bunit_sz = 128 * 1024 * 1024; /* 128M bytes */
69 unsigned long default_btune_ratio = 50; /* 50 percentage */
70 unsigned long default_iunit_sz = 5120; /* 5120 inodes */
71 unsigned long default_itune_ratio = 50; /* 50 percentage */
73 cfs_mem_cache_t *qunit_cachep = NULL;
74 struct list_head qunit_hash[NR_DQHASH];
75 spinlock_t qunit_hash_lock = SPIN_LOCK_UNLOCKED;
77 /* please sync qunit_state with qunit_state_names */
84 * a qunit is added into qunit hash, that means
85 * a quota req will be sent or is flying
89 * a qunit is removed from qunit hash, that
90 * means a quota req is handled and comes back
92 QUNIT_RM_FROM_HASH = 2,
94 * qunit can wake up all threads waiting for it
99 static const char *qunit_state_names[] = {
100 [QUNIT_CREATED] = "CREATED",
101 [QUNIT_IN_HASH] = "IN_HASH",
102 [QUNIT_RM_FROM_HASH] = "RM_FROM_HASH",
103 [QUNIT_FINISHED] = "FINISHED",
106 struct lustre_qunit {
107 struct list_head lq_hash; /** Hash list in memory */
108 atomic_t lq_refcnt; /** Use count */
109 struct lustre_quota_ctxt *lq_ctxt; /** Quota context this applies to */
110 struct qunit_data lq_data; /** See qunit_data */
111 unsigned int lq_opc; /** QUOTA_DQACQ, QUOTA_DQREL */
112 cfs_waitq_t lq_waitq; /** Threads waiting for this qunit */
113 spinlock_t lq_lock; /** Protect the whole structure */
114 enum qunit_state lq_state; /** Present the status of qunit */
115 int lq_rc; /** The rc of lq_data */
119 #define QUNIT_SET_STATE(qunit, state) \
121 spin_lock(&qunit->lq_lock); \
122 QDATA_DEBUG((&qunit->lq_data), "qunit(%p) lq_state(%s->%s), " \
123 "lq_rc(%d), lq_owner(%d)\n", \
124 qunit, qunit_state_names[qunit->lq_state], \
125 qunit_state_names[state], qunit->lq_rc, \
127 qunit->lq_state = state; \
128 spin_unlock(&qunit->lq_lock); \
131 #define QUNIT_SET_STATE_AND_RC(qunit, state, rc) \
133 spin_lock(&qunit->lq_lock); \
135 QDATA_DEBUG((&qunit->lq_data), "qunit(%p) lq_state(%s->%s), " \
136 "lq_rc(%d), lq_owner(%d)\n", \
137 qunit, qunit_state_names[qunit->lq_state], \
138 qunit_state_names[state], qunit->lq_rc, \
140 qunit->lq_state = state; \
141 spin_unlock(&qunit->lq_lock); \
144 int should_translate_quota (struct obd_import *imp)
149 if (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_QUOTA64)
155 void qunit_cache_cleanup(void)
160 spin_lock(&qunit_hash_lock);
161 for (i = 0; i < NR_DQHASH; i++)
162 LASSERT(list_empty(qunit_hash + i));
163 spin_unlock(&qunit_hash_lock);
167 rc = cfs_mem_cache_destroy(qunit_cachep);
168 LASSERTF(rc == 0, "couldn't destroy qunit_cache slab\n");
174 int qunit_cache_init(void)
179 LASSERT(qunit_cachep == NULL);
180 qunit_cachep = cfs_mem_cache_create("ll_qunit_cache",
181 sizeof(struct lustre_qunit),
186 spin_lock(&qunit_hash_lock);
187 for (i = 0; i < NR_DQHASH; i++)
188 CFS_INIT_LIST_HEAD(qunit_hash + i);
189 spin_unlock(&qunit_hash_lock);
194 qunit_hashfn(struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata)
195 __attribute__((__const__));
198 qunit_hashfn(struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata)
200 unsigned int id = qdata->qd_id;
201 unsigned int type = QDATA_IS_GRP(qdata);
203 unsigned long tmp = ((unsigned long)qctxt >> L1_CACHE_SHIFT) ^ id;
204 tmp = (tmp * (MAXQUOTAS - type)) % NR_DQHASH;
208 /* caller must hold qunit_hash_lock */
209 static inline struct lustre_qunit *find_qunit(unsigned int hashent,
210 struct lustre_quota_ctxt *qctxt,
211 struct qunit_data *qdata)
213 struct lustre_qunit *qunit = NULL;
214 struct qunit_data *tmp;
216 LASSERT_SPIN_LOCKED(&qunit_hash_lock);
217 list_for_each_entry(qunit, qunit_hash + hashent, lq_hash) {
218 tmp = &qunit->lq_data;
219 if (qunit->lq_ctxt == qctxt &&
220 qdata->qd_id == tmp->qd_id &&
221 (qdata->qd_flags & LQUOTA_QUNIT_FLAGS) ==
222 (tmp->qd_flags & LQUOTA_QUNIT_FLAGS))
228 /* check_cur_qunit - check the current usage of qunit.
229 * @qctxt: quota context
230 * @qdata: the type of quota unit to be checked
232 * return: 1 - need acquire qunit;
233 * 2 - need release qunit;
234 * 0 - need do nothing.
238 check_cur_qunit(struct obd_device *obd,
239 struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata)
241 struct super_block *sb = qctxt->lqc_sb;
242 unsigned long qunit_sz, tune_sz;
243 __u64 usage, limit, limit_org, pending_write = 0;
244 long long record = 0;
245 struct obd_quotactl *qctl;
246 struct lustre_qunit_size *lqs = NULL;
250 if (!sb_any_quota_enabled(sb))
253 spin_lock(&qctxt->lqc_lock);
254 if (!qctxt->lqc_valid){
255 spin_unlock(&qctxt->lqc_lock);
258 spin_unlock(&qctxt->lqc_lock);
264 /* get fs quota usage & limit */
265 qctl->qc_cmd = Q_GETQUOTA;
266 qctl->qc_id = qdata->qd_id;
267 qctl->qc_type = QDATA_IS_GRP(qdata);
268 ret = fsfilt_quotactl(obd, sb, qctl);
270 if (ret == -ESRCH) /* no limit */
273 CERROR("can't get fs quota usage! (rc:%d)\n", ret);
277 if (QDATA_IS_BLK(qdata)) {
278 usage = qctl->qc_dqblk.dqb_curspace;
279 limit = qctl->qc_dqblk.dqb_bhardlimit << QUOTABLOCK_BITS;
281 usage = qctl->qc_dqblk.dqb_curinodes;
282 limit = qctl->qc_dqblk.dqb_ihardlimit;
285 /* ignore the no quota limit case; and it can avoid creating
286 * unnecessary lqs for uid/gid */
290 lqs = quota_search_lqs(LQS_KEY(QDATA_IS_GRP(qdata), qdata->qd_id),
292 if (IS_ERR(lqs) || lqs == NULL) {
293 CDEBUG(D_ERROR, "fail to find a lqs(%s id: %u)!\n",
294 QDATA_IS_GRP(qdata) ? "group" : "user", qdata->qd_id);
297 spin_lock(&lqs->lqs_lock);
299 if (QDATA_IS_BLK(qdata)) {
300 qunit_sz = lqs->lqs_bunit_sz;
301 tune_sz = lqs->lqs_btune_sz;
302 pending_write = lqs->lqs_bwrite_pending;
303 record = lqs->lqs_blk_rec;
304 LASSERT(!(qunit_sz % QUOTABLOCK_SIZE));
306 /* we didn't need change inode qunit size now */
307 qunit_sz = lqs->lqs_iunit_sz;
308 tune_sz = lqs->lqs_itune_sz;
309 pending_write = lqs->lqs_iwrite_pending;
310 record = lqs->lqs_ino_rec;
313 /* we don't count the MIN_QLIMIT */
314 if ((limit == MIN_QLIMIT && !QDATA_IS_BLK(qdata)) ||
315 (toqb(limit) == MIN_QLIMIT && QDATA_IS_BLK(qdata)))
318 usage += pending_write;
320 /* when a releasing quota req is sent, before it returned
321 limit is assigned a small value. limit will overflow */
322 if (limit + record < 0)
327 LASSERT(qdata->qd_count == 0);
328 if (limit <= usage + tune_sz) {
329 while (qdata->qd_count + limit <=
331 qdata->qd_count += qunit_sz;
333 } else if (limit > usage + qunit_sz + tune_sz &&
334 limit_org > qdata->qd_count + qunit_sz) {
335 while (limit - qdata->qd_count > usage + qunit_sz + tune_sz &&
336 limit_org > qdata->qd_count + qunit_sz)
337 qdata->qd_count += qunit_sz;
339 /* if there are other pending writes for this uid/gid, releasing
340 * quota is put off until the last pending write b=16645 */
341 if (ret == 2 && pending_write) {
342 CDEBUG(D_QUOTA, "delay quota release\n");
346 CDEBUG(D_QUOTA, "type: %c, limit: "LPU64", usage: "LPU64
347 ", pending_write: "LPU64", record: "LPD64
348 ", qunit_sz: %lu, tune_sz: %lu, ret: %d.\n",
349 QDATA_IS_BLK(qdata) ? 'b' : 'i', limit, usage, pending_write,
350 record, qunit_sz, tune_sz, ret);
351 LASSERT(ret == 0 || qdata->qd_count);
353 spin_unlock(&lqs->lqs_lock);
362 * Compute the remaining quota for certain gid or uid b=11693
364 int compute_remquota(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
365 struct qunit_data *qdata, int isblk)
367 struct super_block *sb = qctxt->lqc_sb;
369 struct obd_quotactl *qctl;
370 int ret = QUOTA_RET_OK;
373 if (!sb_any_quota_enabled(sb))
374 RETURN(QUOTA_RET_NOQUOTA);
376 /* ignore root user */
377 if (qdata->qd_id == 0 && QDATA_IS_GRP(qdata) == USRQUOTA)
378 RETURN(QUOTA_RET_NOLIMIT);
384 /* get fs quota usage & limit */
385 qctl->qc_cmd = Q_GETQUOTA;
386 qctl->qc_id = qdata->qd_id;
387 qctl->qc_type = QDATA_IS_GRP(qdata);
388 ret = fsfilt_quotactl(obd, sb, qctl);
390 if (ret == -ESRCH) /* no limit */
391 ret = QUOTA_RET_NOLIMIT;
393 CDEBUG(D_QUOTA, "can't get fs quota usage! (rc:%d)",
398 usage = isblk ? qctl->qc_dqblk.dqb_curspace :
399 qctl->qc_dqblk.dqb_curinodes;
400 limit = isblk ? qctl->qc_dqblk.dqb_bhardlimit << QUOTABLOCK_BITS :
401 qctl->qc_dqblk.dqb_ihardlimit;
402 if (!limit){ /* no limit */
403 ret = QUOTA_RET_NOLIMIT;
408 qdata->qd_count = limit - usage;
417 static struct lustre_qunit *alloc_qunit(struct lustre_quota_ctxt *qctxt,
418 struct qunit_data *qdata, int opc)
420 struct lustre_qunit *qunit = NULL;
423 OBD_SLAB_ALLOC_PTR_GFP(qunit, qunit_cachep, CFS_ALLOC_IO);
427 CFS_INIT_LIST_HEAD(&qunit->lq_hash);
428 init_waitqueue_head(&qunit->lq_waitq);
429 atomic_set(&qunit->lq_refcnt, 1);
430 qunit->lq_ctxt = qctxt;
431 memcpy(&qunit->lq_data, qdata, sizeof(*qdata));
433 qunit->lq_lock = SPIN_LOCK_UNLOCKED;
434 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_CREATED, 0);
435 qunit->lq_owner = cfs_curproc_pid();
439 static inline void free_qunit(struct lustre_qunit *qunit)
441 OBD_SLAB_FREE(qunit, qunit_cachep, sizeof(*qunit));
444 static inline void qunit_get(struct lustre_qunit *qunit)
446 atomic_inc(&qunit->lq_refcnt);
449 static void qunit_put(struct lustre_qunit *qunit)
451 LASSERT(atomic_read(&qunit->lq_refcnt));
452 if (atomic_dec_and_test(&qunit->lq_refcnt))
456 /* caller must hold qunit_hash_lock and release ref of qunit after using it */
457 static struct lustre_qunit *dqacq_in_flight(struct lustre_quota_ctxt *qctxt,
458 struct qunit_data *qdata)
460 unsigned int hashent = qunit_hashfn(qctxt, qdata);
461 struct lustre_qunit *qunit;
464 LASSERT_SPIN_LOCKED(&qunit_hash_lock);
465 qunit = find_qunit(hashent, qctxt, qdata);
472 insert_qunit_nolock(struct lustre_quota_ctxt *qctxt, struct lustre_qunit *qunit)
474 struct list_head *head;
476 LASSERT(list_empty(&qunit->lq_hash));
478 head = qunit_hash + qunit_hashfn(qctxt, &qunit->lq_data);
479 list_add(&qunit->lq_hash, head);
480 QUNIT_SET_STATE(qunit, QUNIT_IN_HASH);
483 static void compute_lqs_after_removing_qunit(struct lustre_qunit *qunit)
485 struct lustre_qunit_size *lqs;
487 lqs = quota_search_lqs(LQS_KEY(QDATA_IS_GRP(&qunit->lq_data),
488 qunit->lq_data.qd_id),
490 if (lqs && !IS_ERR(lqs)) {
491 spin_lock(&lqs->lqs_lock);
492 if (qunit->lq_opc == QUOTA_DQACQ)
493 quota_compute_lqs(&qunit->lq_data, lqs, 0, 1);
494 if (qunit->lq_opc == QUOTA_DQREL)
495 quota_compute_lqs(&qunit->lq_data, lqs, 0, 0);
496 spin_unlock(&lqs->lqs_lock);
497 /* this is for quota_search_lqs */
499 /* this is for schedule_dqacq */
504 static void remove_qunit_nolock(struct lustre_qunit *qunit)
506 LASSERT(!list_empty(&qunit->lq_hash));
507 LASSERT_SPIN_LOCKED(&qunit_hash_lock);
509 list_del_init(&qunit->lq_hash);
510 QUNIT_SET_STATE(qunit, QUNIT_RM_FROM_HASH);
514 void* quota_barrier(struct lustre_quota_ctxt *qctxt,
515 struct obd_quotactl *oqctl, int isblk)
517 struct lustre_qunit *qunit, *find_qunit;
520 OBD_SLAB_ALLOC(qunit, qunit_cachep, CFS_ALLOC_IO, sizeof(*qunit));
522 CERROR("locating qunit failed.(id=%u isblk=%d %s)\n",
523 oqctl->qc_id, isblk, oqctl->qc_type ? "grp" : "usr");
524 qctxt_wait_pending_dqacq(qctxt, oqctl->qc_id,
525 oqctl->qc_type, isblk);
529 INIT_LIST_HEAD(&qunit->lq_hash);
530 qunit->lq_lock = SPIN_LOCK_UNLOCKED;
531 init_waitqueue_head(&qunit->lq_waitq);
532 atomic_set(&qunit->lq_refcnt, 1);
533 qunit->lq_ctxt = qctxt;
534 qunit->lq_data.qd_id = oqctl->qc_id;
535 qunit->lq_data.qd_flags = oqctl->qc_type;
537 QDATA_SET_BLK(&qunit->lq_data);
538 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_CREATED, 0);
539 /* it means it is only an invalid qunit for barrier */
540 qunit->lq_opc = QUOTA_LAST_OPC;
543 spin_lock(&qunit_hash_lock);
544 find_qunit = dqacq_in_flight(qctxt, &qunit->lq_data);
546 spin_unlock(&qunit_hash_lock);
547 qunit_put(find_qunit);
548 qctxt_wait_pending_dqacq(qctxt, oqctl->qc_id,
549 oqctl->qc_type, isblk);
550 CDEBUG(D_QUOTA, "cycle=%d\n", cycle++);
555 insert_qunit_nolock(qctxt, qunit);
556 spin_unlock(&qunit_hash_lock);
560 void quota_unbarrier(void *handle)
562 struct lustre_qunit *qunit = (struct lustre_qunit *)handle;
565 CERROR("handle is NULL\n");
569 LASSERT(qunit->lq_opc == QUOTA_LAST_OPC);
570 spin_lock(&qunit_hash_lock);
571 remove_qunit_nolock(qunit);
572 spin_unlock(&qunit_hash_lock);
573 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, QUOTA_REQ_RETURNED);
574 wake_up(&qunit->lq_waitq);
578 #define INC_QLIMIT(limit, count) (limit == MIN_QLIMIT) ? \
579 (limit = count) : (limit += count)
582 static inline int is_master(struct lustre_quota_ctxt *qctxt)
584 return qctxt->lqc_handler ? 1 : 0;
588 schedule_dqacq(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
589 struct qunit_data *qdata, int opc, int wait,
590 struct obd_trans_info *oti);
592 static inline void qdata_to_oqaq(struct qunit_data *qdata,
593 struct quota_adjust_qunit *oqaq)
598 oqaq->qaq_flags = qdata->qd_flags;
599 oqaq->qaq_id = qdata->qd_id;
600 if (QDATA_IS_ADJBLK(qdata))
601 oqaq->qaq_bunit_sz = qdata->qd_qunit;
602 if (QDATA_IS_ADJINO(qdata))
603 oqaq->qaq_iunit_sz = qdata->qd_qunit;
607 dqacq_completion(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
608 struct qunit_data *qdata, int rc, int opc)
610 struct lustre_qunit *qunit = NULL;
611 struct super_block *sb = qctxt->lqc_sb;
613 struct quota_adjust_qunit *oqaq = NULL;
618 QDATA_DEBUG(qdata, "obd(%s): complete %s quota req\n",
619 obd->obd_name, (opc == QUOTA_DQACQ) ? "acq" : "rel");
621 /* do it only when a releasing quota req more than 5MB b=18491 */
622 if (opc == QUOTA_DQREL && qdata->qd_count >= 5242880)
623 OBD_FAIL_TIMEOUT(OBD_FAIL_QUOTA_DELAY_REL, 5);
625 /* update local operational quota file */
627 __u64 count = QUSG(qdata->qd_count, QDATA_IS_BLK(qdata));
628 struct obd_quotactl *qctl;
633 GOTO(out, err = -ENOMEM);
635 /* acq/rel qunit for specified uid/gid is serialized,
636 * so there is no race between get fs quota limit and
637 * set fs quota limit */
638 qctl->qc_cmd = Q_GETQUOTA;
639 qctl->qc_id = qdata->qd_id;
640 qctl->qc_type = QDATA_IS_GRP(qdata);
641 err = fsfilt_quotactl(obd, sb, qctl);
643 CERROR("error get quota fs limit! (rc:%d)\n", err);
647 if (QDATA_IS_BLK(qdata)) {
648 qctl->qc_dqblk.dqb_valid = QIF_BLIMITS;
649 hardlimit = &qctl->qc_dqblk.dqb_bhardlimit;
651 qctl->qc_dqblk.dqb_valid = QIF_ILIMITS;
652 hardlimit = &qctl->qc_dqblk.dqb_ihardlimit;
655 CDEBUG(D_QUOTA, "hardlimt: "LPU64"\n", *hardlimit);
662 INC_QLIMIT(*hardlimit, count);
665 LASSERTF(count < *hardlimit,
666 "id(%u) flag(%u) type(%c) isblk(%c) "
667 "count("LPU64") qd_qunit("LPU64") "
668 "hardlimit("LPU64").\n",
669 qdata->qd_id, qdata->qd_flags,
670 QDATA_IS_GRP(qdata) ? 'g' : 'u',
671 QDATA_IS_BLK(qdata) ? 'b': 'i',
672 qdata->qd_count, qdata->qd_qunit, *hardlimit);
679 /* clear quota limit */
683 qctl->qc_cmd = Q_SETQUOTA;
684 err = fsfilt_quotactl(obd, sb, qctl);
686 CERROR("error set quota fs limit! (rc:%d)\n", err);
688 QDATA_DEBUG(qdata, "%s completion\n",
689 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
692 } else if (rc == -EDQUOT) {
693 QDATA_DEBUG(qdata, "acquire qunit got EDQUOT.\n");
694 } else if (rc == -EBUSY) {
695 QDATA_DEBUG(qdata, "it's is recovering, got EBUSY.\n");
697 CERROR("acquire qunit got error! (rc:%d)\n", rc);
700 /* remove the qunit from hash */
701 spin_lock(&qunit_hash_lock);
703 qunit = dqacq_in_flight(qctxt, qdata);
704 /* this qunit has been removed by qctxt_cleanup() */
706 spin_unlock(&qunit_hash_lock);
707 QDATA_DEBUG(qdata, "%s is discarded because qunit isn't found\n",
708 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
712 LASSERT(opc == qunit->lq_opc);
713 /* remove this qunit from lq_hash so that new processes cannot be added
714 * to qunit->lq_waiters */
715 remove_qunit_nolock(qunit);
716 spin_unlock(&qunit_hash_lock);
718 compute_lqs_after_removing_qunit(qunit);
721 rc = QUOTA_REQ_RETURNED;
722 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, rc);
723 /* wake up all waiters */
724 wake_up_all(&qunit->lq_waitq);
726 /* this is for dqacq_in_flight() */
728 /* this is for alloc_qunit() */
730 if (rc < 0 && rc != -EDQUOT)
733 /* don't reschedule in such cases:
734 * - acq/rel failure and qunit isn't changed,
735 * but not for quota recovery.
736 * - local dqacq/dqrel.
737 * - local disk io failure.
742 qdata_to_oqaq(qdata, oqaq);
743 /* adjust the qunit size in slaves */
744 rc1 = quota_adjust_slave_lqs(oqaq, qctxt);
747 CERROR("adjust slave's qunit size failed!(rc:%d)\n", rc1);
750 if (err || (rc < 0 && rc != -EBUSY && rc1 == 0) || is_master(qctxt))
753 if (opc == QUOTA_DQREL && qdata->qd_count >= 5242880 &&
754 OBD_FAIL_CHECK(OBD_FAIL_QUOTA_DELAY_REL))
757 /* reschedule another dqacq/dqrel if needed */
759 qdata->qd_flags &= LQUOTA_QUNIT_FLAGS;
760 rc1 = check_cur_qunit(obd, qctxt, qdata);
763 opc = rc1 == 1 ? QUOTA_DQACQ : QUOTA_DQREL;
764 rc1 = schedule_dqacq(obd, qctxt, qdata, opc, 0, NULL);
765 QDATA_DEBUG(qdata, "reschedudle opc(%d) rc(%d)\n", opc, rc1);
770 struct dqacq_async_args {
771 struct lustre_quota_ctxt *aa_ctxt;
772 struct lustre_qunit *aa_qunit;
775 static int dqacq_interpret(const struct lu_env *env,
776 struct ptlrpc_request *req, void *data, int rc)
778 struct dqacq_async_args *aa = (struct dqacq_async_args *)data;
779 struct lustre_quota_ctxt *qctxt = aa->aa_ctxt;
780 struct obd_device_target *obt = qctxt->lqc_obt;
781 struct lustre_qunit *qunit = aa->aa_qunit;
782 struct obd_device *obd = req->rq_import->imp_obd;
783 struct qunit_data *qdata = NULL;
787 LASSERT(req->rq_import);
789 down_read(&obt->obt_rwsem);
790 /* if a quota req timeouts or is dropped, we should update quota
791 * statistics which will be handled in dqacq_completion. And in
792 * this situation we should get qdata from request instead of
794 qdata = quota_get_qdata(req, (rc != 0) ? QUOTA_REQUEST : QUOTA_REPLY,
798 DEBUG_REQ(D_ERROR, req,
799 "error unpacking qunit_data(rc: %ld)\n",
801 RETURN(PTR_ERR(qdata));
804 QDATA_DEBUG(qdata, "qdata: interpret rc(%d).\n", rc);
805 QDATA_DEBUG((&qunit->lq_data), "lq_data: \n");
807 if (qdata->qd_id != qunit->lq_data.qd_id ||
808 OBD_FAIL_CHECK(OBD_FAIL_QUOTA_RET_QDATA)) {
809 CDEBUG(D_ERROR, "the returned qd_id isn't expected!"
810 "(qdata: %u, lq_data: %u)\n", qdata->qd_id,
811 qunit->lq_data.qd_id);
812 qdata->qd_id = qunit->lq_data.qd_id;
815 if (QDATA_IS_GRP(qdata) != QDATA_IS_GRP(&qunit->lq_data)) {
816 CDEBUG(D_ERROR, "the returned grp/usr isn't expected!"
817 "(qdata: %u, lq_data: %u)\n", qdata->qd_flags,
818 qunit->lq_data.qd_flags);
819 if (QDATA_IS_GRP(&qunit->lq_data))
820 QDATA_SET_GRP(qdata);
822 QDATA_CLR_GRP(qdata);
825 if (qdata->qd_count > qunit->lq_data.qd_count) {
826 CDEBUG(D_ERROR, "the returned qd_count isn't expected!"
827 "(qdata: "LPU64", lq_data: "LPU64")\n", qdata->qd_count,
828 qunit->lq_data.qd_count);
832 rc = dqacq_completion(obd, qctxt, qdata, rc,
833 lustre_msg_get_opc(req->rq_reqmsg));
835 up_read(&obt->obt_rwsem);
840 * check if quota master is online
842 int check_qm(struct lustre_quota_ctxt *qctxt)
847 spin_lock(&qctxt->lqc_lock);
848 /* quit waiting when mds is back or qctxt is cleaned up */
849 rc = qctxt->lqc_import || !qctxt->lqc_valid;
850 spin_unlock(&qctxt->lqc_lock);
855 /* wake up all waiting threads when lqc_import is NULL */
856 void dqacq_interrupt(struct lustre_quota_ctxt *qctxt)
858 struct lustre_qunit *qunit, *tmp;
862 spin_lock(&qunit_hash_lock);
863 for (i = 0; i < NR_DQHASH; i++) {
864 list_for_each_entry_safe(qunit, tmp, &qunit_hash[i], lq_hash) {
865 if (qunit->lq_ctxt != qctxt)
868 /* Wake up all waiters. Do not change lq_state.
869 * The waiters will check lq_rc which is kept as 0
870 * if no others change it, then the waiters will return
871 * -EAGAIN to caller who can perform related quota
872 * acq/rel if necessary. */
873 wake_up_all(&qunit->lq_waitq);
876 spin_unlock(&qunit_hash_lock);
880 static int got_qunit(struct lustre_qunit *qunit, int is_master)
882 struct lustre_quota_ctxt *qctxt = qunit->lq_ctxt;
886 spin_lock(&qunit->lq_lock);
887 switch (qunit->lq_state) {
889 case QUNIT_RM_FROM_HASH:
895 CERROR("invalid qunit state %d\n", qunit->lq_state);
897 spin_unlock(&qunit->lq_lock);
900 spin_lock(&qctxt->lqc_lock);
901 rc = !qctxt->lqc_valid;
903 rc |= !qctxt->lqc_import;
904 spin_unlock(&qctxt->lqc_lock);
911 schedule_dqacq(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
912 struct qunit_data *qdata, int opc, int wait,
913 struct obd_trans_info *oti)
915 struct lustre_qunit *qunit, *empty;
916 struct l_wait_info lwi = { 0 };
917 struct ptlrpc_request *req;
918 struct dqacq_async_args *aa;
919 struct obd_import *imp = NULL;
920 struct lustre_qunit_size *lqs = NULL;
921 struct timeval work_start;
922 struct timeval work_end;
927 LASSERT(opc == QUOTA_DQACQ || opc == QUOTA_DQREL);
928 do_gettimeofday(&work_start);
929 if ((empty = alloc_qunit(qctxt, qdata, opc)) == NULL)
932 spin_lock(&qunit_hash_lock);
933 qunit = dqacq_in_flight(qctxt, qdata);
935 spin_unlock(&qunit_hash_lock);
938 goto wait_completion;
942 insert_qunit_nolock(qctxt, qunit);
943 spin_unlock(&qunit_hash_lock);
945 lqs = quota_search_lqs(LQS_KEY(QDATA_IS_GRP(qdata), qdata->qd_id),
947 if (lqs && !IS_ERR(lqs)) {
948 spin_lock(&lqs->lqs_lock);
949 quota_compute_lqs(qdata, lqs, 1, (opc == QUOTA_DQACQ) ? 1 : 0);
950 /* when this qdata returned from mds, it will call lqs_putref */
952 spin_unlock(&lqs->lqs_lock);
953 /* this is for quota_search_lqs */
956 CDEBUG(D_ERROR, "Can't find the lustre qunit size!\n");
959 QDATA_DEBUG(qdata, "obd(%s): send %s quota req\n",
960 obd->obd_name, (opc == QUOTA_DQACQ) ? "acq" : "rel");
961 /* master is going to dqacq/dqrel from itself */
962 if (is_master(qctxt)) {
964 QDATA_DEBUG(qdata, "local %s.\n",
965 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
966 QDATA_SET_CHANGE_QS(qdata);
967 rc = qctxt->lqc_handler(obd, qdata, opc);
968 rc2 = dqacq_completion(obd, qctxt, qdata, rc, opc);
969 /* this is for qunit_get() */
972 do_gettimeofday(&work_end);
973 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
974 if (opc == QUOTA_DQACQ)
975 lprocfs_counter_add(qctxt->lqc_stats,
976 wait ? LQUOTA_SYNC_ACQ : LQUOTA_ASYNC_ACQ,
979 lprocfs_counter_add(qctxt->lqc_stats,
980 wait ? LQUOTA_SYNC_REL : LQUOTA_ASYNC_REL,
982 RETURN(rc ? rc : rc2);
985 spin_lock(&qctxt->lqc_lock);
986 if (!qctxt->lqc_import) {
987 spin_unlock(&qctxt->lqc_lock);
988 QDATA_DEBUG(qdata, "lqc_import is invalid.\n");
990 spin_lock(&qunit_hash_lock);
991 remove_qunit_nolock(qunit);
992 spin_unlock(&qunit_hash_lock);
994 compute_lqs_after_removing_qunit(qunit);
996 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, -EAGAIN);
997 wake_up_all(&qunit->lq_waitq);
999 /* this is for qunit_get() */
1001 /* this for alloc_qunit() */
1003 spin_lock(&qctxt->lqc_lock);
1004 if (wait && !qctxt->lqc_import) {
1005 spin_unlock(&qctxt->lqc_lock);
1007 LASSERT(oti && oti->oti_thread &&
1008 oti->oti_thread->t_watchdog);
1010 lc_watchdog_disable(oti->oti_thread->t_watchdog);
1011 CDEBUG(D_QUOTA, "sleep for quota master\n");
1012 l_wait_event(qctxt->lqc_wait_for_qmaster,
1013 check_qm(qctxt), &lwi);
1014 CDEBUG(D_QUOTA, "wake up when quota master is back\n");
1015 lc_watchdog_touch(oti->oti_thread->t_watchdog,
1016 GET_TIMEOUT(oti->oti_thread->t_svc));
1018 spin_unlock(&qctxt->lqc_lock);
1023 imp = class_import_get(qctxt->lqc_import);
1024 spin_unlock(&qctxt->lqc_lock);
1026 /* build dqacq/dqrel request */
1029 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_QUOTA_DQACQ,
1030 LUSTRE_MDS_VERSION, opc);
1031 class_import_put(imp);
1033 CDEBUG(D_ERROR, "Can't alloc request\n");
1034 dqacq_completion(obd, qctxt, qdata, -ENOMEM, opc);
1035 /* this is for qunit_get() */
1040 ptlrpc_request_set_replen(req);
1041 req->rq_no_resend = req->rq_no_delay = 1;
1042 rc = quota_copy_qdata(req, qdata, QUOTA_REQUEST, QUOTA_IMPORT);
1044 CDEBUG(D_ERROR, "Can't pack qunit_data(rc: %d)\n", rc);
1045 ptlrpc_req_finished(req);
1046 dqacq_completion(obd, qctxt, qdata, -EPROTO, opc);
1047 /* this is for qunit_get() */
1052 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1053 aa = ptlrpc_req_async_args(req);
1054 aa->aa_ctxt = qctxt;
1055 aa->aa_qunit = qunit;
1057 req->rq_interpret_reply = dqacq_interpret;
1058 ptlrpcd_add_req(req, PSCOPE_OTHER);
1060 QDATA_DEBUG(qdata, "%s scheduled.\n",
1061 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
1063 if (wait && qunit) {
1064 struct qunit_data *p = &qunit->lq_data;
1066 QDATA_DEBUG(p, "qunit(%p) is waiting for dqacq.\n", qunit);
1067 l_wait_event(qunit->lq_waitq, got_qunit(qunit, is_master(qctxt)),
1069 /* rc = -EAGAIN, it means the quota master isn't ready yet
1070 * rc = QUOTA_REQ_RETURNED, it means a quota req is finished;
1071 * rc = -EDQUOT, it means out of quota
1072 * rc = -EBUSY, it means recovery is happening
1073 * other rc < 0, it means real errors, functions who call
1074 * schedule_dqacq should take care of this */
1075 spin_lock(&qunit->lq_lock);
1077 spin_unlock(&qunit->lq_lock);
1078 CDEBUG(D_QUOTA, "qunit(%p) finishes waiting: id(%u) flag(%u) "
1079 "rc(%d) owner(%d)\n", qunit, qunit->lq_data.qd_id,
1080 qunit->lq_data.qd_flags, rc, qunit->lq_owner);
1084 do_gettimeofday(&work_end);
1085 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
1086 if (opc == QUOTA_DQACQ)
1087 lprocfs_counter_add(qctxt->lqc_stats,
1088 wait ? LQUOTA_SYNC_ACQ : LQUOTA_ASYNC_ACQ,
1091 lprocfs_counter_add(qctxt->lqc_stats,
1092 wait ? LQUOTA_SYNC_REL : LQUOTA_ASYNC_REL,
1099 qctxt_adjust_qunit(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
1100 const unsigned int id[], __u32 isblk, int wait,
1101 struct obd_trans_info *oti)
1103 int rc = 0, i = USRQUOTA;
1104 struct qunit_data qdata[MAXQUOTAS];
1107 if (quota_is_set(obd, id, isblk ? QB_SET : QI_SET) == 0)
1110 for (i = 0; i < MAXQUOTAS; i++) {
1111 qdata[i].qd_id = id[i];
1112 qdata[i].qd_flags = i;
1114 QDATA_SET_BLK(&qdata[i]);
1115 qdata[i].qd_count = 0;
1117 rc = check_cur_qunit(obd, qctxt, &qdata[i]);
1120 /* need acquire or release */
1121 opc = rc == 1 ? QUOTA_DQACQ : QUOTA_DQREL;
1122 rc = schedule_dqacq(obd, qctxt, &qdata[i], opc,
1126 } else if (wait == 1) {
1127 /* when wait equates 1, that means mds_quota_acquire
1128 * or filter_quota_acquire is calling it. */
1129 rc = qctxt_wait_pending_dqacq(qctxt, id[i], i, isblk);
1139 qctxt_wait_pending_dqacq(struct lustre_quota_ctxt *qctxt, unsigned int id,
1140 unsigned short type, int isblk)
1142 struct lustre_qunit *qunit = NULL;
1143 struct qunit_data qdata;
1144 struct timeval work_start;
1145 struct timeval work_end;
1147 struct l_wait_info lwi = { 0 };
1151 do_gettimeofday(&work_start);
1153 qdata.qd_flags = type;
1155 QDATA_SET_BLK(&qdata);
1158 spin_lock(&qunit_hash_lock);
1159 qunit = dqacq_in_flight(qctxt, &qdata);
1160 spin_unlock(&qunit_hash_lock);
1163 struct qunit_data *p = &qunit->lq_data;
1165 QDATA_DEBUG(p, "qunit(%p) is waiting for dqacq.\n", qunit);
1166 l_wait_event(qunit->lq_waitq, got_qunit(qunit, is_master(qctxt)),
1168 CDEBUG(D_QUOTA, "qunit(%p) finishes waiting: rc(%d) "
1169 "owner(%d)\n", qunit, qunit->lq_rc, qunit->lq_owner);
1170 /* keep same as schedule_dqacq() b=17030 */
1171 spin_lock(&qunit->lq_lock);
1173 spin_unlock(&qunit->lq_lock);
1174 /* this is for dqacq_in_flight() */
1176 do_gettimeofday(&work_end);
1177 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
1178 lprocfs_counter_add(qctxt->lqc_stats,
1179 isblk ? LQUOTA_WAIT_PENDING_BLK_QUOTA :
1180 LQUOTA_WAIT_PENDING_INO_QUOTA,
1183 do_gettimeofday(&work_end);
1184 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
1185 lprocfs_counter_add(qctxt->lqc_stats,
1186 isblk ? LQUOTA_NOWAIT_PENDING_BLK_QUOTA :
1187 LQUOTA_NOWAIT_PENDING_INO_QUOTA,
1195 qctxt_init(struct obd_device *obd, dqacq_handler_t handler)
1197 struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
1198 struct obd_device_target *obt = &obd->u.obt;
1199 struct super_block *sb = obt->obt_sb;
1205 rc = ptlrpcd_addref();
1209 cfs_waitq_init(&qctxt->lqc_wait_for_qmaster);
1210 spin_lock_init(&qctxt->lqc_lock);
1211 spin_lock(&qctxt->lqc_lock);
1212 qctxt->lqc_handler = handler;
1214 qctxt->lqc_obt = obt;
1215 qctxt->lqc_import = NULL;
1216 qctxt->lqc_recovery = 0;
1217 qctxt->lqc_switch_qs = 1; /* Change qunit size in default setting */
1218 qctxt->lqc_valid = 1;
1219 qctxt->lqc_cqs_boundary_factor = 4;
1220 qctxt->lqc_cqs_least_bunit = PTLRPC_MAX_BRW_SIZE;
1221 qctxt->lqc_cqs_least_iunit = 2;
1222 qctxt->lqc_cqs_qs_factor = 2;
1223 qctxt->lqc_flags = 0;
1224 QUOTA_MASTER_UNREADY(qctxt);
1225 qctxt->lqc_bunit_sz = default_bunit_sz;
1226 qctxt->lqc_btune_sz = default_bunit_sz / 100 * default_btune_ratio;
1227 qctxt->lqc_iunit_sz = default_iunit_sz;
1228 qctxt->lqc_itune_sz = default_iunit_sz * default_itune_ratio / 100;
1229 qctxt->lqc_switch_seconds = 300; /* enlarging will wait 5 minutes
1230 * after the last shrinking */
1231 qctxt->lqc_sync_blk = 0;
1232 spin_unlock(&qctxt->lqc_lock);
1234 qctxt->lqc_lqs_hash = lustre_hash_init("LQS_HASH",
1238 if (!qctxt->lqc_lqs_hash) {
1239 CERROR("initialize hash lqs for %s error!\n", obd->obd_name);
1244 rc = lquota_proc_setup(obd, is_master(qctxt));
1246 CERROR("initialize proc for %s error!\n", obd->obd_name);
1253 void hash_put_lqs(void *obj, void *data)
1255 lqs_putref((struct lustre_qunit_size *)obj);
1258 void qctxt_cleanup(struct lustre_quota_ctxt *qctxt, int force)
1260 struct lustre_qunit *qunit, *tmp;
1261 struct list_head tmp_list;
1262 struct obd_device_target *obt = qctxt->lqc_obt;
1266 CFS_INIT_LIST_HEAD(&tmp_list);
1268 spin_lock(&qctxt->lqc_lock);
1269 qctxt->lqc_valid = 0;
1270 spin_unlock(&qctxt->lqc_lock);
1272 spin_lock(&qunit_hash_lock);
1273 for (i = 0; i < NR_DQHASH; i++) {
1274 list_for_each_entry_safe(qunit, tmp, &qunit_hash[i], lq_hash) {
1275 if (qunit->lq_ctxt != qctxt)
1277 remove_qunit_nolock(qunit);
1278 list_add(&qunit->lq_hash, &tmp_list);
1281 spin_unlock(&qunit_hash_lock);
1283 list_for_each_entry_safe(qunit, tmp, &tmp_list, lq_hash) {
1284 list_del_init(&qunit->lq_hash);
1285 compute_lqs_after_removing_qunit(qunit);
1287 /* wake up all waiters */
1288 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, 0);
1289 wake_up_all(&qunit->lq_waitq);
1293 lustre_hash_for_each_safe(qctxt->lqc_lqs_hash, hash_put_lqs, NULL);
1294 down_write(&obt->obt_rwsem);
1295 lustre_hash_exit(qctxt->lqc_lqs_hash);
1296 qctxt->lqc_lqs_hash = NULL;
1297 up_write(&obt->obt_rwsem);
1299 /* after qctxt_cleanup, qctxt might be freed, then check_qm() is
1300 * unpredicted. So we must wait until lqc_wait_for_qmaster is empty */
1301 while (cfs_waitq_active(&qctxt->lqc_wait_for_qmaster)) {
1302 cfs_waitq_signal(&qctxt->lqc_wait_for_qmaster);
1303 cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE,
1304 cfs_time_seconds(1));
1310 if (lquota_proc_cleanup(qctxt))
1311 CERROR("cleanup proc error!\n");
1317 struct qslave_recov_thread_data {
1318 struct obd_device *obd;
1319 struct lustre_quota_ctxt *qctxt;
1320 struct completion comp;
1323 /* FIXME only recovery block quota by now */
1324 static int qslave_recovery_main(void *arg)
1326 struct qslave_recov_thread_data *data = arg;
1327 struct obd_device *obd = data->obd;
1328 struct lustre_quota_ctxt *qctxt = data->qctxt;
1333 ptlrpc_daemonize("qslave_recovd");
1336 class_incref(obd, "qslave_recovd_filter", obd);
1338 complete(&data->comp);
1340 spin_lock(&qctxt->lqc_lock);
1341 if (qctxt->lqc_recovery) {
1342 spin_unlock(&qctxt->lqc_lock);
1343 class_decref(obd, "qslave_recovd_filter", obd);
1346 qctxt->lqc_recovery = 1;
1347 spin_unlock(&qctxt->lqc_lock);
1350 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
1351 struct qunit_data qdata;
1352 struct quota_info *dqopt = sb_dqopt(qctxt->lqc_sb);
1353 struct list_head id_list;
1354 struct dquot_id *dqid, *tmp;
1357 LOCK_DQONOFF_MUTEX(dqopt);
1358 if (!sb_has_quota_enabled(qctxt->lqc_sb, type)) {
1359 UNLOCK_DQONOFF_MUTEX(dqopt);
1363 LASSERT(dqopt->files[type] != NULL);
1364 CFS_INIT_LIST_HEAD(&id_list);
1365 #ifndef KERNEL_SUPPORTS_QUOTA_READ
1366 rc = fsfilt_qids(obd, dqopt->files[type], NULL, type, &id_list);
1368 rc = fsfilt_qids(obd, NULL, dqopt->files[type], type, &id_list);
1370 UNLOCK_DQONOFF_MUTEX(dqopt);
1372 CERROR("Get ids from quota file failed. (rc:%d)\n", rc);
1374 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
1375 list_del_init(&dqid->di_link);
1376 /* skip slave recovery on itself */
1377 if (is_master(qctxt))
1379 if (rc && rc != -EBUSY)
1382 qdata.qd_id = dqid->di_id;
1383 qdata.qd_flags = type;
1384 QDATA_SET_BLK(&qdata);
1387 ret = check_cur_qunit(obd, qctxt, &qdata);
1390 opc = ret == 1 ? QUOTA_DQACQ : QUOTA_DQREL;
1391 rc = schedule_dqacq(obd, qctxt, &qdata, opc,
1400 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
1401 "qslave recovery failed! (id:%d type:%d "
1402 " rc:%d)\n", dqid->di_id, type, rc);
1408 spin_lock(&qctxt->lqc_lock);
1409 qctxt->lqc_recovery = 0;
1410 spin_unlock(&qctxt->lqc_lock);
1411 class_decref(obd, "qslave_recovd_filter", obd);
1416 qslave_start_recovery(struct obd_device *obd, struct lustre_quota_ctxt *qctxt)
1418 struct qslave_recov_thread_data data;
1422 if (!sb_any_quota_enabled(qctxt->lqc_sb))
1427 init_completion(&data.comp);
1429 rc = kernel_thread(qslave_recovery_main, &data, CLONE_VM|CLONE_FILES);
1431 CERROR("Cannot start quota recovery thread: rc %d\n", rc);
1434 wait_for_completion(&data.comp);
1441 * lqs<->qctxt hash operations
1445 * string hashing using djb2 hash algorithm
1448 lqs_hash(lustre_hash_t *lh, void *key, unsigned mask)
1450 struct quota_adjust_qunit *lqs_key;
1455 lqs_key = (struct quota_adjust_qunit *)key;
1456 hash = (QAQ_IS_GRP(lqs_key) ? 5381 : 5387) * lqs_key->qaq_id;
1458 RETURN(hash & mask);
1462 lqs_compare(void *key, struct hlist_node *hnode)
1464 struct lustre_qunit_size *q;
1469 q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1471 spin_lock(&q->lqs_lock);
1472 rc = (q->lqs_key == *((unsigned long long *)key));
1473 spin_unlock(&q->lqs_lock);
1479 lqs_get(struct hlist_node *hnode)
1481 struct lustre_qunit_size *q =
1482 hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1485 atomic_inc(&q->lqs_refcount);
1486 CDEBUG(D_QUOTA, "lqs=%p refcount %d\n",
1487 q, atomic_read(&q->lqs_refcount));
1493 lqs_put(struct hlist_node *hnode)
1495 struct lustre_qunit_size *q =
1496 hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1499 LASSERT(atomic_read(&q->lqs_refcount) > 0);
1500 atomic_dec(&q->lqs_refcount);
1501 CDEBUG(D_QUOTA, "lqs=%p refcount %d\n",
1502 q, atomic_read(&q->lqs_refcount));
1508 lqs_exit(struct hlist_node *hnode)
1510 struct lustre_qunit_size *q;
1513 q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1515 * Nothing should be left. User of lqs put it and
1516 * lqs also was deleted from table by this time
1517 * so we should have 0 refs.
1519 LASSERTF(atomic_read(&q->lqs_refcount) == 0,
1520 "Busy lqs %p with %d refs\n", q,
1521 atomic_read(&q->lqs_refcount));
1526 static lustre_hash_ops_t lqs_hash_ops = {
1527 .lh_hash = lqs_hash,
1528 .lh_compare = lqs_compare,
1533 #endif /* HAVE_QUOTA_SUPPORT */