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/buffer_head.h>
47 # include <linux/workqueue.h>
48 # include <linux/mount.h>
49 #else /* __KERNEL__ */
50 # include <liblustre.h>
53 #include <obd_class.h>
54 #include <lustre_mds.h>
55 #include <lustre_dlm.h>
56 #include <lustre_cfg.h>
58 #include <lustre_fsfilt.h>
59 #include <linux/lustre_quota.h>
60 #include "quota_internal.h"
64 * This function is charge of recording lqs_ino_rec and
65 * lqs_blk_rec. when a lquota slave checks a quota
66 * request(check_cur_qunit) and finishes a quota
67 * request(dqacq_completion), it will be called.
68 * is_chk: whether it is checking quota; otherwise, it is finishing
69 * is_acq: whether it is acquiring; otherwise, it is releasing
71 void quota_compute_lqs(struct qunit_data *qdata, struct lustre_qunit_size *lqs,
72 int is_chk, int is_acq)
76 LASSERT(qdata && lqs);
77 LASSERT_SPIN_LOCKED(&lqs->lqs_lock);
79 rec = QDATA_IS_BLK(qdata) ? &lqs->lqs_blk_rec : &lqs->lqs_ino_rec;
81 if (!!is_chk + !!is_acq == 1)
82 *rec -= qdata->qd_count;
84 *rec += qdata->qd_count;
88 struct lustre_qunit_size *quota_search_lqs(unsigned long long lqs_key,
89 struct lustre_quota_ctxt *qctxt,
92 struct lustre_qunit_size *lqs;
93 struct lustre_qunit_size *lqs2;
94 cfs_hash_t *hs = NULL;
97 cfs_spin_lock(&qctxt->lqc_lock);
98 if (qctxt->lqc_valid) {
99 LASSERT(qctxt->lqc_lqs_hash != NULL);
100 hs = cfs_hash_getref(qctxt->lqc_lqs_hash);
102 cfs_spin_unlock(&qctxt->lqc_lock);
109 /* cfs_hash_lookup will +1 refcount for caller */
110 lqs = cfs_hash_lookup(qctxt->lqc_lqs_hash, &lqs_key);
111 if (lqs != NULL) /* found */
123 lqs->lqs_key = lqs_key;
125 cfs_spin_lock_init(&lqs->lqs_lock);
127 lqs->lqs_bwrite_pending = 0;
128 lqs->lqs_iwrite_pending = 0;
129 lqs->lqs_ino_rec = 0;
130 lqs->lqs_blk_rec = 0;
131 lqs->lqs_id = LQS_KEY_ID(lqs->lqs_key);
132 lqs->lqs_flags = LQS_KEY_GRP(lqs->lqs_key) ? LQUOTA_FLAGS_GRP : 0;
133 lqs->lqs_bunit_sz = qctxt->lqc_bunit_sz;
134 lqs->lqs_iunit_sz = qctxt->lqc_iunit_sz;
135 lqs->lqs_btune_sz = qctxt->lqc_btune_sz;
136 lqs->lqs_itune_sz = qctxt->lqc_itune_sz;
137 if (qctxt->lqc_handler) {
138 lqs->lqs_last_bshrink = 0;
139 lqs->lqs_last_ishrink = 0;
142 lqs->lqs_ctxt = qctxt; /* must be called before lqs_initref */
143 cfs_atomic_set(&lqs->lqs_refcount, 1); /* 1 for caller */
144 cfs_atomic_inc(&lqs->lqs_ctxt->lqc_lqs);
146 /* lqc_lqs_hash will take +1 refcount on lqs on adding */
147 lqs2 = cfs_hash_findadd_unique(qctxt->lqc_lqs_hash,
148 &lqs->lqs_key, &lqs->lqs_hash);
149 if (lqs2 == lqs) /* added to hash */
159 if (rc != 0) { /* error */
160 CERROR("get lqs error(rc: %d)\n", rc);
165 LQS_DEBUG(lqs, "%s\n",
166 (create == 1 ? "create lqs" : "search lqs"));
171 int quota_adjust_slave_lqs(struct quota_adjust_qunit *oqaq,
172 struct lustre_quota_ctxt *qctxt)
174 struct lustre_qunit_size *lqs = NULL;
175 unsigned long *unit, *tune;
177 cfs_time_t time_limit = 0, *shrink;
182 lqs = quota_search_lqs(LQS_KEY(QAQ_IS_GRP(oqaq), oqaq->qaq_id),
183 qctxt, QAQ_IS_CREATE_LQS(oqaq) ? 1 : 0);
184 if (lqs == NULL || IS_ERR(lqs)){
185 CERROR("fail to find a lqs for %sid %u!\n",
186 QAQ_IS_GRP(oqaq) ? "g" : "u", oqaq->qaq_id);
187 RETURN(PTR_ERR(lqs));
190 CDEBUG(D_QUOTA, "before: bunit: %lu, iunit: %lu.\n",
191 lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
192 cfs_spin_lock(&lqs->lqs_lock);
193 for (i = 0; i < 2; i++) {
194 if (i == 0 && !QAQ_IS_ADJBLK(oqaq))
197 if (i == 1 && !QAQ_IS_ADJINO(oqaq))
200 tmp = i ? (lqs->lqs_iunit_sz - oqaq->qaq_iunit_sz) :
201 (lqs->lqs_bunit_sz - oqaq->qaq_bunit_sz);
202 shrink = i ? &lqs->lqs_last_ishrink :
203 &lqs->lqs_last_bshrink;
204 time_limit = cfs_time_add(i ? lqs->lqs_last_ishrink :
205 lqs->lqs_last_bshrink,
206 cfs_time_seconds(qctxt->lqc_switch_seconds));
207 unit = i ? &lqs->lqs_iunit_sz : &lqs->lqs_bunit_sz;
208 tune = i ? &lqs->lqs_itune_sz : &lqs->lqs_btune_sz;
210 /* quota master shrinks */
211 if (qctxt->lqc_handler && tmp > 0)
212 *shrink = cfs_time_current();
214 /* quota master enlarges */
215 if (qctxt->lqc_handler && tmp < 0) {
216 /* in case of ping-pong effect, don't enlarge lqs
219 cfs_time_before(cfs_time_current(), time_limit))
223 /* when setquota, don't enlarge lqs b=18616 */
224 if (QAQ_IS_CREATE_LQS(oqaq) && tmp < 0)
228 *unit = i ? oqaq->qaq_iunit_sz : oqaq->qaq_bunit_sz;
234 rc |= i ? LQS_INO_DECREASE : LQS_BLK_DECREASE;
236 rc |= i ? LQS_INO_INCREASE : LQS_BLK_INCREASE;
238 cfs_spin_unlock(&lqs->lqs_lock);
239 CDEBUG(D_QUOTA, "after: bunit: %lu, iunit: %lu.\n",
240 lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
247 int filter_quota_adjust_qunit(struct obd_export *exp,
248 struct quota_adjust_qunit *oqaq,
249 struct lustre_quota_ctxt *qctxt,
250 struct ptlrpc_request_set *rqset)
252 struct obd_device *obd = exp->exp_obd;
253 unsigned int id[MAXQUOTAS] = { 0, 0 };
258 LASSERT(QAQ_IS_ADJBLK(oqaq));
259 rc = quota_adjust_slave_lqs(oqaq, qctxt);
261 CERROR("adjust mds slave's qunit size failed!(rc:%d)\n", rc);
264 if (QAQ_IS_GRP(oqaq))
265 id[GRPQUOTA] = oqaq->qaq_id;
267 id[USRQUOTA] = oqaq->qaq_id;
270 rc = qctxt_adjust_qunit(obd, qctxt, id, 1, 0, NULL);
271 if (rc == -EDQUOT || rc == -EBUSY ||
272 rc == QUOTA_REQ_RETURNED || rc == -EAGAIN) {
273 CDEBUG(D_QUOTA, "rc: %d.\n", rc);
277 CERROR("slave adjust block quota failed!(rc:%d)\n", rc);
281 #endif /* __KERNEL__ */