lustre/quota/quota_ctl.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 (c) 2007, 2010, Oracle and/or its affiliates. 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 <lustre_quota.h>
  63 #include "quota_internal.h"
  64
  65 #ifdef HAVE_QUOTA_SUPPORT
  66 #ifdef __KERNEL__
  67
  68 int mds_quota_ctl(struct obd_device *obd, struct obd_export *unused,
  69                   struct obd_quotactl *oqctl)
  70 {
  71         struct obd_device_target *obt = &obd->u.obt;
  72         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
  73         struct timeval work_start;
  74         struct timeval work_end;
  75         long timediff;
  76         int rc = 0;
  77         ENTRY;
  78
  79         cfs_gettimeofday(&work_start);
  80         switch (oqctl->qc_cmd) {
  81         case Q_QUOTAON:
  82                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
  83                 rc = mds_quota_on(obd, oqctl);
  84                 break;
  85         case Q_QUOTAOFF:
  86                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
  87                 rc = mds_quota_off(obd, oqctl);
  88                 break;
  89         case Q_SETINFO:
  90                 rc = mds_set_dqinfo(obd, oqctl);
  91                 break;
  92         case Q_GETINFO:
  93                 rc = mds_get_dqinfo(obd, oqctl);
  94                 break;
  95         case Q_SETQUOTA:
  96                 rc = mds_set_dqblk(obd, oqctl);
  97                 break;
  98         case Q_GETQUOTA:
  99                 rc = mds_get_dqblk(obd, oqctl);
 100                 break;
 101         case Q_GETOINFO:
 102         case Q_GETOQUOTA:
 103                 rc = mds_get_obd_quota(obd, oqctl);
 104                 break;
 105         case LUSTRE_Q_INVALIDATE:
 106                 rc = mds_quota_invalidate(obd, oqctl);
 107                 break;
 108         case LUSTRE_Q_FINVALIDATE:
 109                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
 110                 rc = mds_quota_finvalidate(obd, oqctl);
 111                 break;
 112         default:
 113                 CERROR("%s: unsupported mds_quotactl command: %d\n",
 114                        obd->obd_name, oqctl->qc_cmd);
 115                 RETURN(-EFAULT);
 116         }
 117
 118         if (rc)
 119                 CDEBUG(D_INFO, "mds_quotactl admin quota command %d, id %u, "
 120                                "type %d, failed: rc = %d\n",
 121                        oqctl->qc_cmd, oqctl->qc_id, oqctl->qc_type, rc);
 122         cfs_gettimeofday(&work_end);
 123         timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
 124         lprocfs_counter_add(qctxt->lqc_stats, LQUOTA_QUOTA_CTL, timediff);
 125
 126         RETURN(rc);
 127 }
 128
 129 int filter_quota_ctl(struct obd_device *unused, struct obd_export *exp,
 130                      struct obd_quotactl *oqctl)
 131 {
 132         struct obd_device *obd = exp->exp_obd;
 133         struct obd_device_target *obt = &obd->u.obt;
 134         struct lvfs_run_ctxt saved;
 135         struct lustre_quota_ctxt *qctxt = &obt->obt_qctxt;
 136         struct lustre_qunit_size *lqs;
 137         void *handle = NULL;
 138         struct timeval work_start;
 139         struct timeval work_end;
 140         long timediff;
 141         int rc = 0;
 142         ENTRY;
 143
 144         cfs_gettimeofday(&work_start);
 145         switch (oqctl->qc_cmd) {
 146         case Q_QUOTAON:
 147                 oqctl->qc_id = obt->obt_qfmt;
 148                 rc = generic_quota_on(obd, oqctl, 0);
 149                 break;
 150         case Q_FINVALIDATE:
 151         case Q_QUOTAOFF:
 152                 cfs_down(&obt->obt_quotachecking);
 153                 if (oqctl->qc_cmd == Q_FINVALIDATE &&
 154                     (obt->obt_qctxt.lqc_flags & UGQUOTA2LQC(oqctl->qc_type))) {
 155                         CWARN("quota[%u] is on yet\n", oqctl->qc_type);
 156                         cfs_up(&obt->obt_quotachecking);
 157                         rc = -EBUSY;
 158                         break;
 159                 }
 160                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
 161         case Q_GETOINFO:
 162         case Q_GETOQUOTA:
 163         case Q_GETQUOTA:
 164                 /* In recovery scenario, this pending dqacq/dqrel might have
 165                  * been processed by master successfully before it's dquot
 166                  * on master enter recovery mode. We must wait for this
 167                  * dqacq/dqrel done then return the correct limits to master */
 168                 if (oqctl->qc_stat == QUOTA_RECOVERING)
 169                         handle = quota_barrier(&obd->u.obt.obt_qctxt, oqctl, 1);
 170
 171                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 172                 rc = fsfilt_quotactl(obd, obt->obt_sb, oqctl);
 173                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 174
 175                 if (oqctl->qc_stat == QUOTA_RECOVERING)
 176                         quota_unbarrier(handle);
 177
 178                 if (oqctl->qc_cmd == Q_QUOTAOFF ||
 179                     oqctl->qc_cmd == Q_FINVALIDATE) {
 180                         if (oqctl->qc_cmd == Q_QUOTAOFF) {
 181                                 if (!rc)
 182                                         obt->obt_qctxt.lqc_flags &=
 183                                                 ~UGQUOTA2LQC(oqctl->qc_type);
 184                                 else if (quota_is_off(qctxt, oqctl))
 185                                                 rc = -EALREADY;
 186                                 CDEBUG(D_QUOTA, "%s: quotaoff type:flags:rc "
 187                                        "%u:%lu:%d\n", obd->obd_name,
 188                                        oqctl->qc_type, qctxt->lqc_flags, rc);
 189                         }
 190                         cfs_up(&obt->obt_quotachecking);
 191                 }
 192
 193                 break;
 194         case Q_SETQUOTA:
 195                 /* currently, it is only used for nullifying the quota */
 196                 handle = quota_barrier(&obd->u.obt.obt_qctxt, oqctl, 1);
 197
 198                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 199                 rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 200
 201                 if (!rc) {
 202                         oqctl->qc_cmd = Q_SYNC;
 203                         fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 204                         oqctl->qc_cmd = Q_SETQUOTA;
 205                 }
 206                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 207                 quota_unbarrier(handle);
 208
 209                 lqs = quota_search_lqs(LQS_KEY(oqctl->qc_type, oqctl->qc_id),
 210                                        qctxt, 0);
 211                 if (lqs == NULL || IS_ERR(lqs)){
 212                         CERROR("fail to create lqs during setquota operation "
 213                                "for %sid %u\n", oqctl->qc_type ? "g" : "u",
 214                                oqctl->qc_id);
 215                 } else {
 216                         lqs->lqs_flags &= ~QB_SET;
 217                         lqs_putref(lqs);
 218                 }
 219
 220                 break;
 221         case Q_INITQUOTA:
 222                 {
 223                 unsigned int id[MAXQUOTAS] = { 0, 0 };
 224
 225                 /* Initialize quota limit to MIN_QLIMIT */
 226                 LASSERT(oqctl->qc_dqblk.dqb_valid == QIF_BLIMITS);
 227                 LASSERT(oqctl->qc_dqblk.dqb_bsoftlimit == 0);
 228
 229                 if (!oqctl->qc_dqblk.dqb_bhardlimit)
 230                         goto adjust;
 231
 232                /* There might be a pending dqacq/dqrel (which is going to
 233                  * clear stale limits on slave). we should wait for it's
 234                  * completion then initialize limits */
 235                 handle = quota_barrier(&obd->u.obt.obt_qctxt, oqctl, 1);
 236                 LASSERT(oqctl->qc_dqblk.dqb_bhardlimit == MIN_QLIMIT);
 237                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 238                 rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 239
 240                 /* Update on-disk quota, in case of lose the changed limits
 241                  * (MIN_QLIMIT) on crash, which cannot be recovered.*/
 242                 if (!rc) {
 243                         oqctl->qc_cmd = Q_SYNC;
 244                         fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 245                         oqctl->qc_cmd = Q_INITQUOTA;
 246                 }
 247                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 248                 quota_unbarrier(handle);
 249
 250                 if (rc)
 251                         RETURN(rc);
 252 adjust:
 253                 lqs = quota_search_lqs(LQS_KEY(oqctl->qc_type, oqctl->qc_id),
 254                                        qctxt, 1);
 255                 if (lqs == NULL || IS_ERR(lqs)){
 256                         CERROR("fail to create lqs during setquota operation "
 257                                "for %sid %u\n", oqctl->qc_type ? "g" : "u",
 258                                oqctl->qc_id);
 259                         break;
 260                 } else {
 261                         lqs->lqs_flags |= QB_SET;
 262                         lqs_putref(lqs);
 263                 }
 264
 265                 /* Trigger qunit pre-acquire */
 266                 if (oqctl->qc_type == USRQUOTA)
 267                         id[USRQUOTA] = oqctl->qc_id;
 268                 else
 269                         id[GRPQUOTA] = oqctl->qc_id;
 270
 271                 rc = qctxt_adjust_qunit(obd, &obd->u.obt.obt_qctxt,
 272                                         id, 1, 0, NULL);
 273                 if (rc == -EDQUOT || rc == -EBUSY) {
 274                         CDEBUG(D_QUOTA, "rc: %d.\n", rc);
 275                         rc = 0;
 276                 }
 277
 278                 break;
 279                 }
 280         default:
 281                 CERROR("%s: unsupported filter_quotactl command: %d\n",
 282                        obd->obd_name, oqctl->qc_cmd);
 283                 RETURN(-EFAULT);
 284         }
 285         cfs_gettimeofday(&work_end);
 286         timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
 287         lprocfs_counter_add(qctxt->lqc_stats, LQUOTA_QUOTA_CTL, timediff);
 288
 289         RETURN(rc);
 290 }
 291 #endif /* __KERNEL__ */
 292 #endif