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, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LQUOTA
40 # include <linux/version.h>
41 # include <linux/module.h>
42 # include <linux/init.h>
43 # include <linux/fs.h>
44 # include <linux/jbd.h>
45 # include <linux/quota.h>
46 # include <linux/smp_lock.h>
47 # include <linux/buffer_head.h>
48 # include <linux/workqueue.h>
49 # include <linux/mount.h>
50 #else /* __KERNEL__ */
51 # include <liblustre.h>
54 #include <obd_class.h>
55 #include <lustre_mds.h>
56 #include <lustre_dlm.h>
57 #include <lustre_cfg.h>
59 #include <lustre_fsfilt.h>
60 #include <linux/lustre_quota.h>
61 #include "quota_internal.h"
65 * This function is charge of recording lqs_ino_rec and
66 * lqs_blk_rec. when a lquota slave checks a quota
67 * request(check_cur_qunit) and finishes a quota
68 * request(dqacq_completion), it will be called.
69 * is_chk: whether it is checking quota; otherwise, it is finishing
70 * is_acq: whether it is acquiring; otherwise, it is releasing
72 void quota_compute_lqs(struct qunit_data *qdata, struct lustre_qunit_size *lqs,
73 int is_chk, int is_acq)
77 LASSERT(qdata && lqs);
78 LASSERT_SPIN_LOCKED(&lqs->lqs_lock);
80 rec = QDATA_IS_BLK(qdata) ? &lqs->lqs_blk_rec : &lqs->lqs_ino_rec;
82 if (!!is_chk + !!is_acq == 1)
83 *rec -= qdata->qd_count;
85 *rec += qdata->qd_count;
89 struct lustre_qunit_size *quota_search_lqs(unsigned long long lqs_key,
90 struct lustre_quota_ctxt *qctxt,
93 struct lustre_qunit_size *lqs;
94 struct lustre_qunit_size *lqs2;
95 cfs_hash_t *hs = NULL;
98 cfs_spin_lock(&qctxt->lqc_lock);
99 if (qctxt->lqc_valid) {
100 LASSERT(qctxt->lqc_lqs_hash != NULL);
101 hs = cfs_hash_getref(qctxt->lqc_lqs_hash);
103 cfs_spin_unlock(&qctxt->lqc_lock);
110 /* cfs_hash_lookup will +1 refcount for caller */
111 lqs = cfs_hash_lookup(qctxt->lqc_lqs_hash, &lqs_key);
112 if (lqs != NULL) /* found */
124 lqs->lqs_key = lqs_key;
126 cfs_spin_lock_init(&lqs->lqs_lock);
128 lqs->lqs_bwrite_pending = 0;
129 lqs->lqs_iwrite_pending = 0;
130 lqs->lqs_ino_rec = 0;
131 lqs->lqs_blk_rec = 0;
132 lqs->lqs_id = LQS_KEY_ID(lqs->lqs_key);
133 lqs->lqs_flags = LQS_KEY_GRP(lqs->lqs_key) ? LQUOTA_FLAGS_GRP : 0;
134 lqs->lqs_bunit_sz = qctxt->lqc_bunit_sz;
135 lqs->lqs_iunit_sz = qctxt->lqc_iunit_sz;
136 lqs->lqs_btune_sz = qctxt->lqc_btune_sz;
137 lqs->lqs_itune_sz = qctxt->lqc_itune_sz;
138 if (qctxt->lqc_handler) {
139 lqs->lqs_last_bshrink = 0;
140 lqs->lqs_last_ishrink = 0;
143 lqs->lqs_ctxt = qctxt; /* must be called before lqs_initref */
144 cfs_atomic_set(&lqs->lqs_refcount, 1); /* 1 for caller */
145 cfs_atomic_inc(&lqs->lqs_ctxt->lqc_lqs);
147 /* lqc_lqs_hash will take +1 refcount on lqs on adding */
148 lqs2 = cfs_hash_findadd_unique(qctxt->lqc_lqs_hash,
149 &lqs->lqs_key, &lqs->lqs_hash);
150 if (lqs2 == lqs) /* added to hash */
160 if (rc != 0) { /* error */
161 CERROR("get lqs error(rc: %d)\n", rc);
166 LQS_DEBUG(lqs, "%s\n",
167 (create == 1 ? "create lqs" : "search lqs"));
172 int quota_adjust_slave_lqs(struct quota_adjust_qunit *oqaq,
173 struct lustre_quota_ctxt *qctxt)
175 struct lustre_qunit_size *lqs = NULL;
176 unsigned long *unit, *tune;
178 cfs_time_t time_limit = 0, *shrink;
183 lqs = quota_search_lqs(LQS_KEY(QAQ_IS_GRP(oqaq), oqaq->qaq_id),
184 qctxt, QAQ_IS_CREATE_LQS(oqaq) ? 1 : 0);
185 if (lqs == NULL || IS_ERR(lqs)){
186 CERROR("fail to find a lqs for %sid %u!\n",
187 QAQ_IS_GRP(oqaq) ? "g" : "u", oqaq->qaq_id);
188 RETURN(PTR_ERR(lqs));
191 CDEBUG(D_QUOTA, "before: bunit: %lu, iunit: %lu.\n",
192 lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
193 cfs_spin_lock(&lqs->lqs_lock);
194 for (i = 0; i < 2; i++) {
195 if (i == 0 && !QAQ_IS_ADJBLK(oqaq))
198 if (i == 1 && !QAQ_IS_ADJINO(oqaq))
201 tmp = i ? (lqs->lqs_iunit_sz - oqaq->qaq_iunit_sz) :
202 (lqs->lqs_bunit_sz - oqaq->qaq_bunit_sz);
203 shrink = i ? &lqs->lqs_last_ishrink :
204 &lqs->lqs_last_bshrink;
205 time_limit = cfs_time_add(i ? lqs->lqs_last_ishrink :
206 lqs->lqs_last_bshrink,
207 cfs_time_seconds(qctxt->lqc_switch_seconds));
208 unit = i ? &lqs->lqs_iunit_sz : &lqs->lqs_bunit_sz;
209 tune = i ? &lqs->lqs_itune_sz : &lqs->lqs_btune_sz;
211 /* quota master shrinks */
212 if (qctxt->lqc_handler && tmp > 0)
213 *shrink = cfs_time_current();
215 /* quota master enlarges */
216 if (qctxt->lqc_handler && tmp < 0) {
217 /* in case of ping-pong effect, don't enlarge lqs
220 cfs_time_before(cfs_time_current(), time_limit))
224 /* when setquota, don't enlarge lqs b=18616 */
225 if (QAQ_IS_CREATE_LQS(oqaq) && tmp < 0)
229 *unit = i ? oqaq->qaq_iunit_sz : oqaq->qaq_bunit_sz;
235 rc |= i ? LQS_INO_DECREASE : LQS_BLK_DECREASE;
237 rc |= i ? LQS_INO_INCREASE : LQS_BLK_INCREASE;
239 cfs_spin_unlock(&lqs->lqs_lock);
240 CDEBUG(D_QUOTA, "after: bunit: %lu, iunit: %lu.\n",
241 lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
248 int filter_quota_adjust_qunit(struct obd_export *exp,
249 struct quota_adjust_qunit *oqaq,
250 struct lustre_quota_ctxt *qctxt,
251 struct ptlrpc_request_set *rqset)
253 struct obd_device *obd = exp->exp_obd;
254 unsigned int id[MAXQUOTAS] = { 0, 0 };
259 LASSERT(QAQ_IS_ADJBLK(oqaq));
260 rc = quota_adjust_slave_lqs(oqaq, qctxt);
262 CERROR("adjust mds slave's qunit size failed!(rc:%d)\n", rc);
265 if (QAQ_IS_GRP(oqaq))
266 id[GRPQUOTA] = oqaq->qaq_id;
268 id[USRQUOTA] = oqaq->qaq_id;
271 rc = qctxt_adjust_qunit(obd, qctxt, id, 1, 0, NULL);
272 if (rc == -EDQUOT || rc == -EBUSY ||
273 rc == QUOTA_REQ_RETURNED || rc == -EAGAIN) {
274 CDEBUG(D_QUOTA, "rc: %d.\n", rc);
278 CERROR("slave adjust block quota failed!(rc:%d)\n", rc);
282 #endif /* __KERNEL__ */