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);
363 * Compute the remaining quota for certain gid or uid b=11693
365 int compute_remquota(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
366 struct qunit_data *qdata, int isblk)
368 struct super_block *sb = qctxt->lqc_sb;
370 struct obd_quotactl *qctl;
371 int ret = QUOTA_RET_OK;
374 if (!sb_any_quota_enabled(sb))
375 RETURN(QUOTA_RET_NOQUOTA);
377 /* ignore root user */
378 if (qdata->qd_id == 0 && QDATA_IS_GRP(qdata) == USRQUOTA)
379 RETURN(QUOTA_RET_NOLIMIT);
385 /* get fs quota usage & limit */
386 qctl->qc_cmd = Q_GETQUOTA;
387 qctl->qc_id = qdata->qd_id;
388 qctl->qc_type = QDATA_IS_GRP(qdata);
389 ret = fsfilt_quotactl(obd, sb, qctl);
391 if (ret == -ESRCH) /* no limit */
392 ret = QUOTA_RET_NOLIMIT;
394 CDEBUG(D_QUOTA, "can't get fs quota usage! (rc:%d)",
399 usage = isblk ? qctl->qc_dqblk.dqb_curspace :
400 qctl->qc_dqblk.dqb_curinodes;
401 limit = isblk ? qctl->qc_dqblk.dqb_bhardlimit << QUOTABLOCK_BITS :
402 qctl->qc_dqblk.dqb_ihardlimit;
403 if (!limit){ /* no limit */
404 ret = QUOTA_RET_NOLIMIT;
409 qdata->qd_count = limit - usage;
418 static struct lustre_qunit *alloc_qunit(struct lustre_quota_ctxt *qctxt,
419 struct qunit_data *qdata, int opc)
421 struct lustre_qunit *qunit = NULL;
424 OBD_SLAB_ALLOC_PTR_GFP(qunit, qunit_cachep, CFS_ALLOC_IO);
428 CFS_INIT_LIST_HEAD(&qunit->lq_hash);
429 init_waitqueue_head(&qunit->lq_waitq);
430 atomic_set(&qunit->lq_refcnt, 1);
431 qunit->lq_ctxt = qctxt;
432 memcpy(&qunit->lq_data, qdata, sizeof(*qdata));
434 qunit->lq_lock = SPIN_LOCK_UNLOCKED;
435 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_CREATED, 0);
436 qunit->lq_owner = cfs_curproc_pid();
440 static inline void free_qunit(struct lustre_qunit *qunit)
442 OBD_SLAB_FREE(qunit, qunit_cachep, sizeof(*qunit));
445 static inline void qunit_get(struct lustre_qunit *qunit)
447 atomic_inc(&qunit->lq_refcnt);
450 static void qunit_put(struct lustre_qunit *qunit)
452 LASSERT(atomic_read(&qunit->lq_refcnt));
453 if (atomic_dec_and_test(&qunit->lq_refcnt))
457 /* caller must hold qunit_hash_lock and release ref of qunit after using it */
458 static struct lustre_qunit *dqacq_in_flight(struct lustre_quota_ctxt *qctxt,
459 struct qunit_data *qdata)
461 unsigned int hashent = qunit_hashfn(qctxt, qdata);
462 struct lustre_qunit *qunit;
465 LASSERT_SPIN_LOCKED(&qunit_hash_lock);
466 qunit = find_qunit(hashent, qctxt, qdata);
473 insert_qunit_nolock(struct lustre_quota_ctxt *qctxt, struct lustre_qunit *qunit)
475 struct list_head *head;
477 LASSERT(list_empty(&qunit->lq_hash));
479 head = qunit_hash + qunit_hashfn(qctxt, &qunit->lq_data);
480 list_add(&qunit->lq_hash, head);
481 QUNIT_SET_STATE(qunit, QUNIT_IN_HASH);
484 static void compute_lqs_after_removing_qunit(struct lustre_qunit *qunit)
486 struct lustre_qunit_size *lqs;
488 lqs = quota_search_lqs(LQS_KEY(QDATA_IS_GRP(&qunit->lq_data),
489 qunit->lq_data.qd_id),
491 if (lqs && !IS_ERR(lqs)) {
492 spin_lock(&lqs->lqs_lock);
493 if (qunit->lq_opc == QUOTA_DQACQ)
494 quota_compute_lqs(&qunit->lq_data, lqs, 0, 1);
495 if (qunit->lq_opc == QUOTA_DQREL)
496 quota_compute_lqs(&qunit->lq_data, lqs, 0, 0);
497 spin_unlock(&lqs->lqs_lock);
498 /* this is for quota_search_lqs */
500 /* this is for schedule_dqacq */
505 static void remove_qunit_nolock(struct lustre_qunit *qunit)
507 LASSERT(!list_empty(&qunit->lq_hash));
508 LASSERT_SPIN_LOCKED(&qunit_hash_lock);
510 list_del_init(&qunit->lq_hash);
511 QUNIT_SET_STATE(qunit, QUNIT_RM_FROM_HASH);
515 void* quota_barrier(struct lustre_quota_ctxt *qctxt,
516 struct obd_quotactl *oqctl, int isblk)
518 struct lustre_qunit *qunit, *find_qunit;
521 OBD_SLAB_ALLOC(qunit, qunit_cachep, CFS_ALLOC_IO, sizeof(*qunit));
523 CERROR("locating qunit failed.(id=%u isblk=%d %s)\n",
524 oqctl->qc_id, isblk, oqctl->qc_type ? "grp" : "usr");
525 qctxt_wait_pending_dqacq(qctxt, oqctl->qc_id,
526 oqctl->qc_type, isblk);
530 INIT_LIST_HEAD(&qunit->lq_hash);
531 qunit->lq_lock = SPIN_LOCK_UNLOCKED;
532 init_waitqueue_head(&qunit->lq_waitq);
533 atomic_set(&qunit->lq_refcnt, 1);
534 qunit->lq_ctxt = qctxt;
535 qunit->lq_data.qd_id = oqctl->qc_id;
536 qunit->lq_data.qd_flags = oqctl->qc_type;
538 QDATA_SET_BLK(&qunit->lq_data);
539 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_CREATED, 0);
540 /* it means it is only an invalid qunit for barrier */
541 qunit->lq_opc = QUOTA_LAST_OPC;
544 spin_lock(&qunit_hash_lock);
545 find_qunit = dqacq_in_flight(qctxt, &qunit->lq_data);
547 spin_unlock(&qunit_hash_lock);
548 qunit_put(find_qunit);
549 qctxt_wait_pending_dqacq(qctxt, oqctl->qc_id,
550 oqctl->qc_type, isblk);
551 CDEBUG(D_QUOTA, "cycle=%d\n", cycle++);
556 insert_qunit_nolock(qctxt, qunit);
557 spin_unlock(&qunit_hash_lock);
561 void quota_unbarrier(void *handle)
563 struct lustre_qunit *qunit = (struct lustre_qunit *)handle;
566 CERROR("handle is NULL\n");
570 LASSERT(qunit->lq_opc == QUOTA_LAST_OPC);
571 spin_lock(&qunit_hash_lock);
572 remove_qunit_nolock(qunit);
573 spin_unlock(&qunit_hash_lock);
574 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, QUOTA_REQ_RETURNED);
575 wake_up(&qunit->lq_waitq);
579 #define INC_QLIMIT(limit, count) (limit == MIN_QLIMIT) ? \
580 (limit = count) : (limit += count)
583 static inline int is_master(struct lustre_quota_ctxt *qctxt)
585 return qctxt->lqc_handler ? 1 : 0;
589 schedule_dqacq(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
590 struct qunit_data *qdata, int opc, int wait,
591 struct obd_trans_info *oti);
593 static inline void qdata_to_oqaq(struct qunit_data *qdata,
594 struct quota_adjust_qunit *oqaq)
599 oqaq->qaq_flags = qdata->qd_flags;
600 oqaq->qaq_id = qdata->qd_id;
601 if (QDATA_IS_ADJBLK(qdata))
602 oqaq->qaq_bunit_sz = qdata->qd_qunit;
603 if (QDATA_IS_ADJINO(qdata))
604 oqaq->qaq_iunit_sz = qdata->qd_qunit;
608 dqacq_completion(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
609 struct qunit_data *qdata, int rc, int opc)
611 struct lustre_qunit *qunit = NULL;
612 struct super_block *sb = qctxt->lqc_sb;
614 struct quota_adjust_qunit *oqaq = NULL;
619 QDATA_DEBUG(qdata, "obd(%s): complete %s quota req\n",
620 obd->obd_name, (opc == QUOTA_DQACQ) ? "acq" : "rel");
622 /* do it only when a releasing quota req more than 5MB b=18491 */
623 if (opc == QUOTA_DQREL && qdata->qd_count >= 5242880)
624 OBD_FAIL_TIMEOUT(OBD_FAIL_QUOTA_DELAY_REL, 5);
626 /* update local operational quota file */
628 __u64 count = QUSG(qdata->qd_count, QDATA_IS_BLK(qdata));
629 struct obd_quotactl *qctl;
634 GOTO(out, err = -ENOMEM);
636 /* acq/rel qunit for specified uid/gid is serialized,
637 * so there is no race between get fs quota limit and
638 * set fs quota limit */
639 qctl->qc_cmd = Q_GETQUOTA;
640 qctl->qc_id = qdata->qd_id;
641 qctl->qc_type = QDATA_IS_GRP(qdata);
642 err = fsfilt_quotactl(obd, sb, qctl);
644 CERROR("error get quota fs limit! (rc:%d)\n", err);
648 if (QDATA_IS_BLK(qdata)) {
649 qctl->qc_dqblk.dqb_valid = QIF_BLIMITS;
650 hardlimit = &qctl->qc_dqblk.dqb_bhardlimit;
652 qctl->qc_dqblk.dqb_valid = QIF_ILIMITS;
653 hardlimit = &qctl->qc_dqblk.dqb_ihardlimit;
656 CDEBUG(D_QUOTA, "hardlimt: "LPU64"\n", *hardlimit);
663 INC_QLIMIT(*hardlimit, count);
666 LASSERTF(count < *hardlimit,
667 "id(%u) flag(%u) type(%c) isblk(%c) "
668 "count("LPU64") qd_qunit("LPU64") "
669 "hardlimit("LPU64").\n",
670 qdata->qd_id, qdata->qd_flags,
671 QDATA_IS_GRP(qdata) ? 'g' : 'u',
672 QDATA_IS_BLK(qdata) ? 'b': 'i',
673 qdata->qd_count, qdata->qd_qunit, *hardlimit);
680 /* clear quota limit */
684 qctl->qc_cmd = Q_SETQUOTA;
685 err = fsfilt_quotactl(obd, sb, qctl);
687 CERROR("error set quota fs limit! (rc:%d)\n", err);
689 QDATA_DEBUG(qdata, "%s completion\n",
690 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
693 } else if (rc == -EDQUOT) {
694 QDATA_DEBUG(qdata, "acquire qunit got EDQUOT.\n");
695 } else if (rc == -EBUSY) {
696 QDATA_DEBUG(qdata, "it's is recovering, got EBUSY.\n");
698 CERROR("acquire qunit got error! (rc:%d)\n", rc);
701 /* remove the qunit from hash */
702 spin_lock(&qunit_hash_lock);
704 qunit = dqacq_in_flight(qctxt, qdata);
705 /* this qunit has been removed by qctxt_cleanup() */
707 spin_unlock(&qunit_hash_lock);
708 QDATA_DEBUG(qdata, "%s is discarded because qunit isn't found\n",
709 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
713 LASSERT(opc == qunit->lq_opc);
714 /* remove this qunit from lq_hash so that new processes cannot be added
715 * to qunit->lq_waiters */
716 remove_qunit_nolock(qunit);
717 spin_unlock(&qunit_hash_lock);
719 compute_lqs_after_removing_qunit(qunit);
722 rc = QUOTA_REQ_RETURNED;
723 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, rc);
724 /* wake up all waiters */
725 wake_up_all(&qunit->lq_waitq);
727 /* this is for dqacq_in_flight() */
729 /* this is for alloc_qunit() */
731 if (rc < 0 && rc != -EDQUOT)
734 /* don't reschedule in such cases:
735 * - acq/rel failure and qunit isn't changed,
736 * but not for quota recovery.
737 * - local dqacq/dqrel.
738 * - local disk io failure.
743 qdata_to_oqaq(qdata, oqaq);
744 /* adjust the qunit size in slaves */
745 rc1 = quota_adjust_slave_lqs(oqaq, qctxt);
748 CERROR("adjust slave's qunit size failed!(rc:%d)\n", rc1);
751 if (err || (rc < 0 && rc != -EBUSY && rc1 == 0) || is_master(qctxt))
754 if (opc == QUOTA_DQREL && qdata->qd_count >= 5242880 &&
755 OBD_FAIL_CHECK(OBD_FAIL_QUOTA_DELAY_REL))
758 /* reschedule another dqacq/dqrel if needed */
760 qdata->qd_flags &= LQUOTA_QUNIT_FLAGS;
761 rc1 = check_cur_qunit(obd, qctxt, qdata);
764 opc = rc1 == 1 ? QUOTA_DQACQ : QUOTA_DQREL;
765 rc1 = schedule_dqacq(obd, qctxt, qdata, opc, 0, NULL);
766 QDATA_DEBUG(qdata, "reschedudle opc(%d) rc(%d)\n", opc, rc1);
771 struct dqacq_async_args {
772 struct lustre_quota_ctxt *aa_ctxt;
773 struct lustre_qunit *aa_qunit;
776 static int dqacq_interpret(const struct lu_env *env,
777 struct ptlrpc_request *req, void *data, int rc)
779 struct dqacq_async_args *aa = (struct dqacq_async_args *)data;
780 struct lustre_quota_ctxt *qctxt = aa->aa_ctxt;
781 struct obd_device_target *obt = qctxt->lqc_obt;
782 struct lustre_qunit *qunit = aa->aa_qunit;
783 struct obd_device *obd = req->rq_import->imp_obd;
784 struct qunit_data *qdata = NULL;
788 LASSERT(req->rq_import);
790 down_read(&obt->obt_rwsem);
791 /* if a quota req timeouts or is dropped, we should update quota
792 * statistics which will be handled in dqacq_completion. And in
793 * this situation we should get qdata from request instead of
795 qdata = quota_get_qdata(req, (rc != 0) ? QUOTA_REQUEST : QUOTA_REPLY,
799 DEBUG_REQ(D_ERROR, req,
800 "error unpacking qunit_data(rc: %ld)\n",
802 RETURN(PTR_ERR(qdata));
805 QDATA_DEBUG(qdata, "qdata: interpret rc(%d).\n", rc);
806 QDATA_DEBUG((&qunit->lq_data), "lq_data: \n");
808 if (qdata->qd_id != qunit->lq_data.qd_id ||
809 OBD_FAIL_CHECK(OBD_FAIL_QUOTA_RET_QDATA)) {
810 CDEBUG(D_ERROR, "the returned qd_id isn't expected!"
811 "(qdata: %u, lq_data: %u)\n", qdata->qd_id,
812 qunit->lq_data.qd_id);
813 qdata->qd_id = qunit->lq_data.qd_id;
816 if (QDATA_IS_GRP(qdata) != QDATA_IS_GRP(&qunit->lq_data)) {
817 CDEBUG(D_ERROR, "the returned grp/usr isn't expected!"
818 "(qdata: %u, lq_data: %u)\n", qdata->qd_flags,
819 qunit->lq_data.qd_flags);
820 if (QDATA_IS_GRP(&qunit->lq_data))
821 QDATA_SET_GRP(qdata);
823 QDATA_CLR_GRP(qdata);
826 if (qdata->qd_count > qunit->lq_data.qd_count) {
827 CDEBUG(D_ERROR, "the returned qd_count isn't expected!"
828 "(qdata: "LPU64", lq_data: "LPU64")\n", qdata->qd_count,
829 qunit->lq_data.qd_count);
833 if (unlikely(rc == -ESRCH))
834 CERROR("quota for %s has been enabled by master, but disabled "
835 "by slave.\n", QDATA_IS_GRP(qdata) ? "group" : "user");
837 rc = dqacq_completion(obd, qctxt, qdata, rc,
838 lustre_msg_get_opc(req->rq_reqmsg));
840 up_read(&obt->obt_rwsem);
845 * check if quota master is online
847 int check_qm(struct lustre_quota_ctxt *qctxt)
852 spin_lock(&qctxt->lqc_lock);
853 /* quit waiting when mds is back or qctxt is cleaned up */
854 rc = qctxt->lqc_import || !qctxt->lqc_valid;
855 spin_unlock(&qctxt->lqc_lock);
860 /* wake up all waiting threads when lqc_import is NULL */
861 void dqacq_interrupt(struct lustre_quota_ctxt *qctxt)
863 struct lustre_qunit *qunit, *tmp;
867 spin_lock(&qunit_hash_lock);
868 for (i = 0; i < NR_DQHASH; i++) {
869 list_for_each_entry_safe(qunit, tmp, &qunit_hash[i], lq_hash) {
870 if (qunit->lq_ctxt != qctxt)
873 /* Wake up all waiters. Do not change lq_state.
874 * The waiters will check lq_rc which is kept as 0
875 * if no others change it, then the waiters will return
876 * -EAGAIN to caller who can perform related quota
877 * acq/rel if necessary. */
878 wake_up_all(&qunit->lq_waitq);
881 spin_unlock(&qunit_hash_lock);
885 static int got_qunit(struct lustre_qunit *qunit, int is_master)
887 struct lustre_quota_ctxt *qctxt = qunit->lq_ctxt;
891 spin_lock(&qunit->lq_lock);
892 switch (qunit->lq_state) {
894 case QUNIT_RM_FROM_HASH:
900 CERROR("invalid qunit state %d\n", qunit->lq_state);
902 spin_unlock(&qunit->lq_lock);
905 spin_lock(&qctxt->lqc_lock);
906 rc = !qctxt->lqc_valid;
908 rc |= !qctxt->lqc_import;
909 spin_unlock(&qctxt->lqc_lock);
916 schedule_dqacq(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
917 struct qunit_data *qdata, int opc, int wait,
918 struct obd_trans_info *oti)
920 struct lustre_qunit *qunit, *empty;
921 struct l_wait_info lwi = { 0 };
922 struct ptlrpc_request *req;
923 struct dqacq_async_args *aa;
924 struct obd_import *imp = NULL;
925 struct lustre_qunit_size *lqs = NULL;
926 struct timeval work_start;
927 struct timeval work_end;
932 LASSERT(opc == QUOTA_DQACQ || opc == QUOTA_DQREL);
933 do_gettimeofday(&work_start);
934 if ((empty = alloc_qunit(qctxt, qdata, opc)) == NULL)
937 spin_lock(&qunit_hash_lock);
938 qunit = dqacq_in_flight(qctxt, qdata);
940 spin_unlock(&qunit_hash_lock);
943 goto wait_completion;
947 insert_qunit_nolock(qctxt, qunit);
948 spin_unlock(&qunit_hash_lock);
950 lqs = quota_search_lqs(LQS_KEY(QDATA_IS_GRP(qdata), qdata->qd_id),
952 if (lqs && !IS_ERR(lqs)) {
953 spin_lock(&lqs->lqs_lock);
954 quota_compute_lqs(qdata, lqs, 1, (opc == QUOTA_DQACQ) ? 1 : 0);
955 /* when this qdata returned from mds, it will call lqs_putref */
957 spin_unlock(&lqs->lqs_lock);
958 /* this is for quota_search_lqs */
961 CDEBUG(D_ERROR, "Can't find the lustre qunit size!\n");
964 QDATA_DEBUG(qdata, "obd(%s): send %s quota req\n",
965 obd->obd_name, (opc == QUOTA_DQACQ) ? "acq" : "rel");
966 /* master is going to dqacq/dqrel from itself */
967 if (is_master(qctxt)) {
969 QDATA_DEBUG(qdata, "local %s.\n",
970 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
971 QDATA_SET_CHANGE_QS(qdata);
972 rc = qctxt->lqc_handler(obd, qdata, opc);
973 rc2 = dqacq_completion(obd, qctxt, qdata, rc, opc);
974 /* this is for qunit_get() */
977 do_gettimeofday(&work_end);
978 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
979 if (opc == QUOTA_DQACQ)
980 lprocfs_counter_add(qctxt->lqc_stats,
981 wait ? LQUOTA_SYNC_ACQ : LQUOTA_ASYNC_ACQ,
984 lprocfs_counter_add(qctxt->lqc_stats,
985 wait ? LQUOTA_SYNC_REL : LQUOTA_ASYNC_REL,
987 RETURN(rc ? rc : rc2);
990 spin_lock(&qctxt->lqc_lock);
991 if (!qctxt->lqc_import) {
992 spin_unlock(&qctxt->lqc_lock);
993 QDATA_DEBUG(qdata, "lqc_import is invalid.\n");
995 spin_lock(&qunit_hash_lock);
996 remove_qunit_nolock(qunit);
997 spin_unlock(&qunit_hash_lock);
999 compute_lqs_after_removing_qunit(qunit);
1001 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, -EAGAIN);
1002 wake_up_all(&qunit->lq_waitq);
1004 /* this is for qunit_get() */
1006 /* this for alloc_qunit() */
1008 spin_lock(&qctxt->lqc_lock);
1009 if (wait && !qctxt->lqc_import) {
1010 spin_unlock(&qctxt->lqc_lock);
1012 LASSERT(oti && oti->oti_thread &&
1013 oti->oti_thread->t_watchdog);
1015 lc_watchdog_disable(oti->oti_thread->t_watchdog);
1016 CDEBUG(D_QUOTA, "sleep for quota master\n");
1017 l_wait_event(qctxt->lqc_wait_for_qmaster,
1018 check_qm(qctxt), &lwi);
1019 CDEBUG(D_QUOTA, "wake up when quota master is back\n");
1020 lc_watchdog_touch(oti->oti_thread->t_watchdog,
1021 GET_TIMEOUT(oti->oti_thread->t_svc));
1023 spin_unlock(&qctxt->lqc_lock);
1028 imp = class_import_get(qctxt->lqc_import);
1029 spin_unlock(&qctxt->lqc_lock);
1031 /* build dqacq/dqrel request */
1034 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_QUOTA_DQACQ,
1035 LUSTRE_MDS_VERSION, opc);
1036 class_import_put(imp);
1038 CDEBUG(D_ERROR, "Can't alloc request\n");
1039 dqacq_completion(obd, qctxt, qdata, -ENOMEM, opc);
1040 /* this is for qunit_get() */
1045 ptlrpc_request_set_replen(req);
1046 req->rq_no_resend = req->rq_no_delay = 1;
1047 rc = quota_copy_qdata(req, qdata, QUOTA_REQUEST, QUOTA_IMPORT);
1049 CDEBUG(D_ERROR, "Can't pack qunit_data(rc: %d)\n", rc);
1050 ptlrpc_req_finished(req);
1051 dqacq_completion(obd, qctxt, qdata, -EPROTO, opc);
1052 /* this is for qunit_get() */
1057 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1058 aa = ptlrpc_req_async_args(req);
1059 aa->aa_ctxt = qctxt;
1060 aa->aa_qunit = qunit;
1062 req->rq_interpret_reply = dqacq_interpret;
1063 ptlrpcd_add_req(req, PSCOPE_OTHER);
1065 QDATA_DEBUG(qdata, "%s scheduled.\n",
1066 opc == QUOTA_DQACQ ? "DQACQ" : "DQREL");
1068 if (wait && qunit) {
1069 struct qunit_data *p = &qunit->lq_data;
1071 QDATA_DEBUG(p, "qunit(%p) is waiting for dqacq.\n", qunit);
1072 l_wait_event(qunit->lq_waitq, got_qunit(qunit, is_master(qctxt)),
1074 /* rc = -EAGAIN, it means the quota master isn't ready yet
1075 * rc = QUOTA_REQ_RETURNED, it means a quota req is finished;
1076 * rc = -EDQUOT, it means out of quota
1077 * rc = -EBUSY, it means recovery is happening
1078 * other rc < 0, it means real errors, functions who call
1079 * schedule_dqacq should take care of this */
1080 spin_lock(&qunit->lq_lock);
1082 spin_unlock(&qunit->lq_lock);
1083 CDEBUG(D_QUOTA, "qunit(%p) finishes waiting: id(%u) flag(%u) "
1084 "rc(%d) owner(%d)\n", qunit, qunit->lq_data.qd_id,
1085 qunit->lq_data.qd_flags, rc, qunit->lq_owner);
1089 do_gettimeofday(&work_end);
1090 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
1091 if (opc == QUOTA_DQACQ)
1092 lprocfs_counter_add(qctxt->lqc_stats,
1093 wait ? LQUOTA_SYNC_ACQ : LQUOTA_ASYNC_ACQ,
1096 lprocfs_counter_add(qctxt->lqc_stats,
1097 wait ? LQUOTA_SYNC_REL : LQUOTA_ASYNC_REL,
1104 qctxt_adjust_qunit(struct obd_device *obd, struct lustre_quota_ctxt *qctxt,
1105 const unsigned int id[], __u32 isblk, int wait,
1106 struct obd_trans_info *oti)
1108 int rc = 0, i = USRQUOTA;
1109 struct qunit_data qdata[MAXQUOTAS];
1112 if (quota_is_set(obd, id, isblk ? QB_SET : QI_SET) == 0)
1115 for (i = 0; i < MAXQUOTAS; i++) {
1116 qdata[i].qd_id = id[i];
1117 qdata[i].qd_flags = i;
1119 QDATA_SET_BLK(&qdata[i]);
1120 qdata[i].qd_count = 0;
1122 rc = check_cur_qunit(obd, qctxt, &qdata[i]);
1125 /* need acquire or release */
1126 opc = rc == 1 ? QUOTA_DQACQ : QUOTA_DQREL;
1127 rc = schedule_dqacq(obd, qctxt, &qdata[i], opc,
1131 } else if (wait == 1) {
1132 /* when wait equates 1, that means mds_quota_acquire
1133 * or filter_quota_acquire is calling it. */
1134 rc = qctxt_wait_pending_dqacq(qctxt, id[i], i, isblk);
1144 qctxt_wait_pending_dqacq(struct lustre_quota_ctxt *qctxt, unsigned int id,
1145 unsigned short type, int isblk)
1147 struct lustre_qunit *qunit = NULL;
1148 struct qunit_data qdata;
1149 struct timeval work_start;
1150 struct timeval work_end;
1152 struct l_wait_info lwi = { 0 };
1156 do_gettimeofday(&work_start);
1158 qdata.qd_flags = type;
1160 QDATA_SET_BLK(&qdata);
1163 spin_lock(&qunit_hash_lock);
1164 qunit = dqacq_in_flight(qctxt, &qdata);
1165 spin_unlock(&qunit_hash_lock);
1168 struct qunit_data *p = &qunit->lq_data;
1170 QDATA_DEBUG(p, "qunit(%p) is waiting for dqacq.\n", qunit);
1171 l_wait_event(qunit->lq_waitq, got_qunit(qunit, is_master(qctxt)),
1173 CDEBUG(D_QUOTA, "qunit(%p) finishes waiting: rc(%d) "
1174 "owner(%d)\n", qunit, qunit->lq_rc, qunit->lq_owner);
1175 /* keep same as schedule_dqacq() b=17030 */
1176 spin_lock(&qunit->lq_lock);
1178 spin_unlock(&qunit->lq_lock);
1179 /* this is for dqacq_in_flight() */
1181 do_gettimeofday(&work_end);
1182 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
1183 lprocfs_counter_add(qctxt->lqc_stats,
1184 isblk ? LQUOTA_WAIT_PENDING_BLK_QUOTA :
1185 LQUOTA_WAIT_PENDING_INO_QUOTA,
1188 do_gettimeofday(&work_end);
1189 timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
1190 lprocfs_counter_add(qctxt->lqc_stats,
1191 isblk ? LQUOTA_NOWAIT_PENDING_BLK_QUOTA :
1192 LQUOTA_NOWAIT_PENDING_INO_QUOTA,
1200 qctxt_init(struct obd_device *obd, dqacq_handler_t handler)
1202 struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
1203 struct obd_device_target *obt = &obd->u.obt;
1204 struct super_block *sb = obt->obt_sb;
1210 rc = ptlrpcd_addref();
1214 cfs_waitq_init(&qctxt->lqc_wait_for_qmaster);
1215 cfs_waitq_init(&qctxt->lqc_lqs_waitq);
1216 atomic_set(&qctxt->lqc_lqs, 0);
1217 spin_lock_init(&qctxt->lqc_lock);
1218 spin_lock(&qctxt->lqc_lock);
1219 qctxt->lqc_handler = handler;
1221 qctxt->lqc_obt = obt;
1222 qctxt->lqc_import = NULL;
1223 qctxt->lqc_recovery = 0;
1224 qctxt->lqc_switch_qs = 1; /* Change qunit size in default setting */
1225 qctxt->lqc_valid = 1;
1226 qctxt->lqc_cqs_boundary_factor = 4;
1227 qctxt->lqc_cqs_least_bunit = PTLRPC_MAX_BRW_SIZE;
1228 qctxt->lqc_cqs_least_iunit = 2;
1229 qctxt->lqc_cqs_qs_factor = 2;
1230 qctxt->lqc_flags = 0;
1231 QUOTA_MASTER_UNREADY(qctxt);
1232 qctxt->lqc_bunit_sz = default_bunit_sz;
1233 qctxt->lqc_btune_sz = default_bunit_sz / 100 * default_btune_ratio;
1234 qctxt->lqc_iunit_sz = default_iunit_sz;
1235 qctxt->lqc_itune_sz = default_iunit_sz * default_itune_ratio / 100;
1236 qctxt->lqc_switch_seconds = 300; /* enlarging will wait 5 minutes
1237 * after the last shrinking */
1238 qctxt->lqc_sync_blk = 0;
1239 spin_unlock(&qctxt->lqc_lock);
1241 qctxt->lqc_lqs_hash = lustre_hash_init("LQS_HASH",
1245 if (!qctxt->lqc_lqs_hash) {
1246 CERROR("initialize hash lqs for %s error!\n", obd->obd_name);
1251 rc = lquota_proc_setup(obd, is_master(qctxt));
1253 CERROR("initialize proc for %s error!\n", obd->obd_name);
1259 static int check_lqs(struct lustre_quota_ctxt *qctxt)
1264 rc = !atomic_read(&qctxt->lqc_lqs);
1270 void hash_put_lqs(void *obj, void *data)
1272 lqs_putref((struct lustre_qunit_size *)obj);
1275 void qctxt_cleanup(struct lustre_quota_ctxt *qctxt, int force)
1277 struct lustre_qunit *qunit, *tmp;
1278 struct list_head tmp_list;
1279 struct l_wait_info lwi = { 0 };
1280 struct obd_device_target *obt = qctxt->lqc_obt;
1284 CFS_INIT_LIST_HEAD(&tmp_list);
1286 spin_lock(&qctxt->lqc_lock);
1287 qctxt->lqc_valid = 0;
1288 spin_unlock(&qctxt->lqc_lock);
1290 spin_lock(&qunit_hash_lock);
1291 for (i = 0; i < NR_DQHASH; i++) {
1292 list_for_each_entry_safe(qunit, tmp, &qunit_hash[i], lq_hash) {
1293 if (qunit->lq_ctxt != qctxt)
1295 remove_qunit_nolock(qunit);
1296 list_add(&qunit->lq_hash, &tmp_list);
1299 spin_unlock(&qunit_hash_lock);
1301 list_for_each_entry_safe(qunit, tmp, &tmp_list, lq_hash) {
1302 list_del_init(&qunit->lq_hash);
1303 compute_lqs_after_removing_qunit(qunit);
1305 /* wake up all waiters */
1306 QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, 0);
1307 wake_up_all(&qunit->lq_waitq);
1311 /* after qctxt_cleanup, qctxt might be freed, then check_qm() is
1312 * unpredicted. So we must wait until lqc_wait_for_qmaster is empty */
1313 while (cfs_waitq_active(&qctxt->lqc_wait_for_qmaster)) {
1314 cfs_waitq_signal(&qctxt->lqc_wait_for_qmaster);
1315 cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE,
1316 cfs_time_seconds(1));
1319 lustre_hash_for_each_safe(qctxt->lqc_lqs_hash, hash_put_lqs, NULL);
1320 l_wait_event(qctxt->lqc_lqs_waitq, check_lqs(qctxt), &lwi);
1321 down_write(&obt->obt_rwsem);
1322 lustre_hash_exit(qctxt->lqc_lqs_hash);
1323 qctxt->lqc_lqs_hash = NULL;
1324 up_write(&obt->obt_rwsem);
1329 if (lquota_proc_cleanup(qctxt))
1330 CERROR("cleanup proc error!\n");
1336 struct qslave_recov_thread_data {
1337 struct obd_device *obd;
1338 struct lustre_quota_ctxt *qctxt;
1339 struct completion comp;
1342 /* FIXME only recovery block quota by now */
1343 static int qslave_recovery_main(void *arg)
1345 struct qslave_recov_thread_data *data = arg;
1346 struct obd_device *obd = data->obd;
1347 struct lustre_quota_ctxt *qctxt = data->qctxt;
1352 cfs_daemonize_ctxt("qslave_recovd");
1355 class_incref(obd, "qslave_recovd_filter", obd);
1357 complete(&data->comp);
1359 spin_lock(&qctxt->lqc_lock);
1360 if (qctxt->lqc_recovery) {
1361 spin_unlock(&qctxt->lqc_lock);
1362 class_decref(obd, "qslave_recovd_filter", obd);
1365 qctxt->lqc_recovery = 1;
1366 spin_unlock(&qctxt->lqc_lock);
1369 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
1370 struct qunit_data qdata;
1371 struct quota_info *dqopt = sb_dqopt(qctxt->lqc_sb);
1372 struct list_head id_list;
1373 struct dquot_id *dqid, *tmp;
1376 LOCK_DQONOFF_MUTEX(dqopt);
1377 if (!sb_has_quota_enabled(qctxt->lqc_sb, type)) {
1378 UNLOCK_DQONOFF_MUTEX(dqopt);
1382 LASSERT(dqopt->files[type] != NULL);
1383 CFS_INIT_LIST_HEAD(&id_list);
1384 #ifndef KERNEL_SUPPORTS_QUOTA_READ
1385 rc = fsfilt_qids(obd, dqopt->files[type], NULL, type, &id_list);
1387 rc = fsfilt_qids(obd, NULL, dqopt->files[type], type, &id_list);
1389 UNLOCK_DQONOFF_MUTEX(dqopt);
1391 CERROR("Get ids from quota file failed. (rc:%d)\n", rc);
1393 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
1394 list_del_init(&dqid->di_link);
1395 /* skip slave recovery on itself */
1396 if (is_master(qctxt))
1398 if (rc && rc != -EBUSY)
1401 qdata.qd_id = dqid->di_id;
1402 qdata.qd_flags = type;
1403 QDATA_SET_BLK(&qdata);
1406 ret = check_cur_qunit(obd, qctxt, &qdata);
1409 opc = ret == 1 ? QUOTA_DQACQ : QUOTA_DQREL;
1410 rc = schedule_dqacq(obd, qctxt, &qdata, opc,
1419 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
1420 "qslave recovery failed! (id:%d type:%d "
1421 " rc:%d)\n", dqid->di_id, type, rc);
1427 spin_lock(&qctxt->lqc_lock);
1428 qctxt->lqc_recovery = 0;
1429 spin_unlock(&qctxt->lqc_lock);
1430 class_decref(obd, "qslave_recovd_filter", obd);
1435 qslave_start_recovery(struct obd_device *obd, struct lustre_quota_ctxt *qctxt)
1437 struct qslave_recov_thread_data data;
1441 if (!sb_any_quota_enabled(qctxt->lqc_sb))
1446 init_completion(&data.comp);
1448 rc = kernel_thread(qslave_recovery_main, &data, CLONE_VM|CLONE_FILES);
1450 CERROR("Cannot start quota recovery thread: rc %d\n", rc);
1453 wait_for_completion(&data.comp);
1458 int quota_is_on(struct lustre_quota_ctxt *qctxt, struct obd_quotactl *oqctl)
1462 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
1463 if (!Q_TYPESET(oqctl, type))
1465 if (!(qctxt->lqc_flags & UGQUOTA2LQC(oqctl->qc_type)))
1471 int quota_is_off(struct lustre_quota_ctxt *qctxt, struct obd_quotactl *oqctl)
1475 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
1476 if (!Q_TYPESET(oqctl, type))
1478 if (qctxt->lqc_flags & UGQUOTA2LQC(oqctl->qc_type))
1485 * When quotaon, build a lqs for every uid/gid who has been set limitation
1486 * for quota. After quota_search_lqs, it will hold one ref for the lqs.
1487 * It will be released when qctxt_cleanup() is executed b=18574
1489 * Should be called with obt->obt_quotachecking held. b=20152
1491 void build_lqs(struct obd_device *obd)
1493 struct obd_device_target *obt = &obd->u.obt;
1494 struct lustre_quota_ctxt *qctxt = &obt->obt_qctxt;
1495 struct list_head id_list;
1498 LASSERT_SEM_LOCKED(&obt->obt_quotachecking);
1499 INIT_LIST_HEAD(&id_list);
1500 for (i = 0; i < MAXQUOTAS; i++) {
1501 struct dquot_id *dqid, *tmp;
1503 if (sb_dqopt(qctxt->lqc_sb)->files[i] == NULL)
1506 #ifndef KERNEL_SUPPORTS_QUOTA_READ
1507 rc = fsfilt_qids(obd, sb_dqopt(qctxt->lqc_sb)->files[i], NULL,
1510 rc = fsfilt_qids(obd, NULL, sb_dqopt(qctxt->lqc_sb)->files[i],
1514 CDEBUG(D_ERROR, "fail to get %s qids!\n",
1515 i ? "group" : "user");
1519 list_for_each_entry_safe(dqid, tmp, &id_list,
1521 struct lustre_qunit_size *lqs;
1523 list_del_init(&dqid->di_link);
1524 lqs = quota_search_lqs(LQS_KEY(i, dqid->di_id),
1526 if (lqs && !IS_ERR(lqs)) {
1527 lqs->lqs_flags |= dqid->di_flag;
1530 CDEBUG(D_ERROR, "fail to create a lqs"
1531 "(%s id: %u)!\n", i ? "group" : "user",
1541 * lqs<->qctxt hash operations
1545 * string hashing using djb2 hash algorithm
1548 lqs_hash(lustre_hash_t *lh, void *key, unsigned mask)
1550 struct quota_adjust_qunit *lqs_key;
1555 lqs_key = (struct quota_adjust_qunit *)key;
1556 hash = (QAQ_IS_GRP(lqs_key) ? 5381 : 5387) * lqs_key->qaq_id;
1558 RETURN(hash & mask);
1562 lqs_compare(void *key, struct hlist_node *hnode)
1564 struct lustre_qunit_size *q;
1569 q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1571 spin_lock(&q->lqs_lock);
1572 rc = (q->lqs_key == *((unsigned long long *)key));
1573 spin_unlock(&q->lqs_lock);
1579 lqs_get(struct hlist_node *hnode)
1581 struct lustre_qunit_size *q =
1582 hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1591 lqs_put(struct hlist_node *hnode)
1593 struct lustre_qunit_size *q =
1594 hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1603 lqs_exit(struct hlist_node *hnode)
1605 struct lustre_qunit_size *q =
1606 hlist_entry(hnode, struct lustre_qunit_size, lqs_hash);
1610 * Nothing should be left. User of lqs put it and
1611 * lqs also was deleted from table by this time
1612 * so we should have 0 refs.
1614 LASSERTF(atomic_read(&q->lqs_refcount) == 0,
1615 "Busy lqs %p with %d refs\n", q,
1616 atomic_read(&q->lqs_refcount));
1621 static lustre_hash_ops_t lqs_hash_ops = {
1622 .lh_hash = lqs_hash,
1623 .lh_compare = lqs_compare,
1628 #endif /* HAVE_QUOTA_SUPPORT */