lustre/quota/quota_adjust_qunit.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   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.
  11  *
  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).
  17  *
  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
  21  *
  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
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #ifndef EXPORT_SYMTAB
  37 # define EXPORT_SYMTAB
  38 #endif
  39 #define DEBUG_SUBSYSTEM S_LQUOTA
  40
  41 #ifdef __KERNEL__
  42 # include <linux/version.h>
  43 # include <linux/module.h>
  44 # include <linux/init.h>
  45 # include <linux/fs.h>
  46 # include <linux/jbd.h>
  47 # include <linux/quota.h>
  48 # include <linux/smp_lock.h>
  49 # include <linux/buffer_head.h>
  50 # include <linux/workqueue.h>
  51 # include <linux/mount.h>
  52 #else /* __KERNEL__ */
  53 # include <liblustre.h>
  54 #endif
  55
  56 #include <obd_class.h>
  57 #include <lustre_mds.h>
  58 #include <lustre_dlm.h>
  59 #include <lustre_cfg.h>
  60 #include <obd_ost.h>
  61 #include <lustre_fsfilt.h>
  62 #include <linux/lustre_quota.h>
  63 #include <class_hash.h>
  64 #include "quota_internal.h"
  65
  66 #ifdef HAVE_QUOTA_SUPPORT
  67
  68 #ifdef __KERNEL__
  69 /**
  70  * This function is charge of recording lqs_ino_rec and
  71  * lqs_blk_rec. when a lquota slave checks a quota
  72  * request(check_cur_qunit) and finishes a quota
  73  * request(dqacq_completion), it will be called.
  74  * is_chk: whether it is checking quota; otherwise, it is finishing
  75  * is_acq: whether it is acquiring; otherwise, it is releasing
  76  */
  77 void quota_compute_lqs(struct qunit_data *qdata, struct lustre_qunit_size *lqs,
  78                        int is_chk, int is_acq)
  79 {
  80         long long *rec;
  81
  82         LASSERT(qdata && lqs);
  83         LASSERT_SPIN_LOCKED(&lqs->lqs_lock);
  84
  85         rec = QDATA_IS_BLK(qdata) ? &lqs->lqs_blk_rec : &lqs->lqs_ino_rec;
  86
  87         if (!!is_chk + !!is_acq == 1)
  88                 *rec -= qdata->qd_count;
  89         else
  90                 *rec += qdata->qd_count;
  91
  92 }
  93
  94 static struct lustre_qunit_size *
  95 quota_create_lqs(unsigned long long lqs_key, struct lustre_quota_ctxt *qctxt)
  96 {
  97         struct lustre_qunit_size *lqs = NULL;
  98         int rc = 0;
  99
 100         OBD_ALLOC_PTR(lqs);
 101         if (!lqs)
 102                 GOTO(out, rc = -ENOMEM);
 103
 104         lqs->lqs_key = lqs_key;
 105
 106         spin_lock_init(&lqs->lqs_lock);
 107         lqs->lqs_bwrite_pending = 0;
 108         lqs->lqs_iwrite_pending = 0;
 109         lqs->lqs_ino_rec = 0;
 110         lqs->lqs_blk_rec = 0;
 111         lqs->lqs_id = LQS_KEY_ID(lqs->lqs_key);
 112         lqs->lqs_flags = LQS_KEY_GRP(lqs->lqs_key) ? LQUOTA_FLAGS_GRP : 0;
 113         lqs->lqs_bunit_sz = qctxt->lqc_bunit_sz;
 114         lqs->lqs_iunit_sz = qctxt->lqc_iunit_sz;
 115         lqs->lqs_btune_sz = qctxt->lqc_btune_sz;
 116         lqs->lqs_itune_sz = qctxt->lqc_itune_sz;
 117         lqs->lqs_ctxt = qctxt;
 118         if (qctxt->lqc_handler) {
 119                 lqs->lqs_last_bshrink  = 0;
 120                 lqs->lqs_last_ishrink  = 0;
 121         }
 122         lqs_initref(lqs);
 123         rc = lustre_hash_add_unique(qctxt->lqc_lqs_hash, &lqs->lqs_key,
 124                                     &lqs->lqs_hash);
 125         if (!rc)
 126                 lqs_getref(lqs);
 127
 128  out:
 129         if (rc && lqs)
 130                 OBD_FREE_PTR(lqs);
 131
 132         if (rc)
 133                 return ERR_PTR(rc);
 134         else
 135                 return lqs;
 136 }
 137
 138 struct lustre_qunit_size *quota_search_lqs(unsigned long long lqs_key,
 139                                            struct lustre_quota_ctxt *qctxt,
 140                                            int create)
 141 {
 142         struct lustre_qunit_size *lqs;
 143         int rc = 0;
 144
 145  search_lqs:
 146         lqs = lustre_hash_lookup(qctxt->lqc_lqs_hash, &lqs_key);
 147         if (IS_ERR(lqs))
 148                 GOTO(out, rc = PTR_ERR(lqs));
 149
 150         if (create && lqs == NULL) {
 151                 /* if quota_create_lqs is successful, it will get a
 152                  * ref to the lqs. The ref will be released when
 153                  * qctxt_cleanup() or quota is nullified */
 154                 lqs = quota_create_lqs(lqs_key, qctxt);
 155                 if (IS_ERR(lqs))
 156                         rc = PTR_ERR(lqs);
 157                 if (rc == -EALREADY)
 158                         GOTO(search_lqs, rc = 0);
 159                 /* get a reference for the caller when creating lqs
 160                  * successfully */
 161                 if (rc == 0)
 162                         lqs_getref(lqs);
 163         }
 164
 165         if (lqs && rc == 0)
 166                 LQS_DEBUG(lqs, "%s\n",
 167                           (create == 1 ? "create lqs" : "search lqs"));
 168
 169  out:
 170         if (rc == 0) {
 171                 return lqs;
 172         } else {
 173                 CDEBUG(D_ERROR, "get lqs error(rc: %d)\n", rc);
 174                 return ERR_PTR(rc);
 175         }
 176 }
 177
 178 int quota_adjust_slave_lqs(struct quota_adjust_qunit *oqaq,
 179                            struct lustre_quota_ctxt *qctxt)
 180 {
 181         struct lustre_qunit_size *lqs = NULL;
 182         unsigned long *unit, *tune;
 183         signed long tmp = 0;
 184         cfs_time_t time_limit = 0, *shrink;
 185         int i, rc = 0;
 186         ENTRY;
 187
 188         LASSERT(qctxt);
 189         lqs = quota_search_lqs(LQS_KEY(QAQ_IS_GRP(oqaq), oqaq->qaq_id),
 190                                qctxt, QAQ_IS_CREATE_LQS(oqaq) ? 1 : 0);
 191         if (lqs == NULL || IS_ERR(lqs)){
 192                 CDEBUG(D_ERROR, "fail to find a lqs(%s id: %u)!\n",
 193                        QAQ_IS_GRP(oqaq) ? "group" : "user", oqaq->qaq_id);
 194                 RETURN(PTR_ERR(lqs));
 195         }
 196
 197         CDEBUG(D_QUOTA, "before: bunit: %lu, iunit: %lu.\n",
 198                lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
 199         spin_lock(&lqs->lqs_lock);
 200         for (i = 0; i < 2; i++) {
 201                 if (i == 0 && !QAQ_IS_ADJBLK(oqaq))
 202                         continue;
 203
 204                 if (i == 1 && !QAQ_IS_ADJINO(oqaq))
 205                         continue;
 206
 207                 tmp = i ? (lqs->lqs_iunit_sz - oqaq->qaq_iunit_sz) :
 208                           (lqs->lqs_bunit_sz - oqaq->qaq_bunit_sz);
 209                 shrink = i ? &lqs->lqs_last_ishrink :
 210                              &lqs->lqs_last_bshrink;
 211                 time_limit = cfs_time_add(i ? lqs->lqs_last_ishrink :
 212                                               lqs->lqs_last_bshrink,
 213                                    cfs_time_seconds(qctxt->lqc_switch_seconds));
 214                 unit = i ? &lqs->lqs_iunit_sz : &lqs->lqs_bunit_sz;
 215                 tune = i ? &lqs->lqs_itune_sz : &lqs->lqs_btune_sz;
 216
 217                 /* quota master shrinks */
 218                 if (qctxt->lqc_handler && tmp > 0)
 219                         *shrink = cfs_time_current();
 220
 221                 /* quota master enlarges */
 222                 if (qctxt->lqc_handler && tmp < 0) {
 223                         /* in case of ping-pong effect, don't enlarge lqs
 224                          * in a short time */
 225                         if (*shrink &&
 226                             cfs_time_before(cfs_time_current(), time_limit))
 227                                 tmp = 0;
 228                 }
 229
 230                 /* when setquota, don't enlarge lqs b=18616 */
 231                 if (QAQ_IS_CREATE_LQS(oqaq) && tmp < 0)
 232                         tmp = 0;
 233
 234                 if (tmp != 0) {
 235                         *unit = i ? oqaq->qaq_iunit_sz : oqaq->qaq_bunit_sz;
 236                         *tune = (*unit) / 2;
 237                 }
 238
 239
 240                 if (tmp > 0)
 241                         rc |= i ? LQS_INO_DECREASE : LQS_BLK_DECREASE;
 242                 if (tmp < 0)
 243                         rc |= i ? LQS_INO_INCREASE : LQS_BLK_INCREASE;
 244         }
 245         spin_unlock(&lqs->lqs_lock);
 246         CDEBUG(D_QUOTA, "after: bunit: %lu, iunit: %lu.\n",
 247                lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
 248
 249         lqs_putref(lqs);
 250
 251         RETURN(rc);
 252 }
 253
 254 int filter_quota_adjust_qunit(struct obd_export *exp,
 255                               struct quota_adjust_qunit *oqaq,
 256                               struct lustre_quota_ctxt *qctxt)
 257 {
 258         struct obd_device *obd = exp->exp_obd;
 259         unsigned int id[MAXQUOTAS] = { 0, 0 };
 260         int rc = 0;
 261         ENTRY;
 262
 263         LASSERT(oqaq);
 264         LASSERT(QAQ_IS_ADJBLK(oqaq));
 265         rc = quota_adjust_slave_lqs(oqaq, qctxt);
 266         if (rc < 0) {
 267                 CERROR("adjust mds slave's qunit size failed!(rc:%d)\n", rc);
 268                 RETURN(rc);
 269         }
 270         if (QAQ_IS_GRP(oqaq))
 271                 id[GRPQUOTA] = oqaq->qaq_id;
 272         else
 273                 id[USRQUOTA] = oqaq->qaq_id;
 274
 275         if (rc > 0) {
 276                 rc = qctxt_adjust_qunit(obd, qctxt, id, 1, 0, NULL);
 277                 if (rc == -EDQUOT || rc == -EBUSY ||
 278                     rc == QUOTA_REQ_RETURNED || rc == -EAGAIN) {
 279                         CDEBUG(D_QUOTA, "rc: %d.\n", rc);
 280                         rc = 0;
 281                 }
 282                 if (rc)
 283                         CERROR("slave adjust block quota failed!(rc:%d)\n", rc);
 284         }
 285         RETURN(rc);
 286 }
 287 #endif /* __KERNEL__ */
 288 #endif
 289
 290 int client_quota_adjust_qunit(struct obd_export *exp,
 291                               struct quota_adjust_qunit *oqaq,
 292                               struct lustre_quota_ctxt *qctxt)
 293 {
 294         struct ptlrpc_request *req;
 295         struct quota_adjust_qunit *oqa;
 296         int rc = 0;
 297         ENTRY;
 298
 299         /* client don't support this kind of operation, abort it */
 300         if (!(exp->exp_connect_flags & OBD_CONNECT_CHANGE_QS)) {
 301                 CDEBUG(D_QUOTA, "osc: %s don't support change qunit size\n",
 302                        exp->exp_obd->obd_name);
 303                 RETURN(rc);
 304         }
 305         if (strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME))
 306                 RETURN(-EINVAL);
 307
 308         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 309                                         &RQF_OST_QUOTA_ADJUST_QUNIT,
 310                                         LUSTRE_OST_VERSION,
 311                                         OST_QUOTA_ADJUST_QUNIT);
 312         if (req == NULL)
 313                 RETURN(-ENOMEM);
 314
 315         oqa = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
 316         *oqa = *oqaq;
 317
 318         ptlrpc_request_set_replen(req);
 319
 320         rc = ptlrpc_queue_wait(req);
 321         if (rc)
 322                 CERROR("%s: %s failed: rc = %d\n", exp->exp_obd->obd_name,
 323                        __FUNCTION__, rc);
 324         ptlrpc_req_finished(req);
 325         RETURN (rc);
 326 }
 327
 328 int lov_quota_adjust_qunit(struct obd_export *exp,
 329                            struct quota_adjust_qunit *oqaq,
 330                            struct lustre_quota_ctxt *qctxt)
 331 {
 332         struct obd_device *obd = class_exp2obd(exp);
 333         struct lov_obd *lov = &obd->u.lov;
 334         int i, rc = 0;
 335         ENTRY;
 336
 337         if (!QAQ_IS_ADJBLK(oqaq)) {
 338                 CERROR("bad qaq_flags %x for lov obd.\n", oqaq->qaq_flags);
 339                 RETURN(-EFAULT);
 340         }
 341
 342         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 343                 int err;
 344
 345                 if (!lov->lov_tgts[i]->ltd_active) {
 346                         CDEBUG(D_HA, "ost %d is inactive\n", i);
 347                         continue;
 348                 }
 349
 350                 err = obd_quota_adjust_qunit(lov->lov_tgts[i]->ltd_exp, oqaq,
 351                                              NULL);
 352                 if (err) {
 353                         if (lov->lov_tgts[i]->ltd_active && !rc)
 354                                 rc = err;
 355                         continue;
 356                 }
 357         }
 358         RETURN(rc);
 359 }