lustre/quota/quota_ctl.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   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.
   9  *
  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).
  15  *
  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
  19  *
  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
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LQUOTA
  38
  39 #ifdef __KERNEL__
  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>
  52 #endif
  53
  54 #include <obd_class.h>
  55 #include <lustre_mds.h>
  56 #include <lustre_dlm.h>
  57 #include <lustre_cfg.h>
  58 #include <obd_ost.h>
  59 #include <lustre_fsfilt.h>
  60 #include <lustre_quota.h>
  61 #include "quota_internal.h"
  62
  63 #ifdef __KERNEL__
  64
  65 int mds_quota_ctl(struct obd_device *obd, struct obd_export *unused,
  66                   struct obd_quotactl *oqctl)
  67 {
  68         struct obd_device_target *obt = &obd->u.obt;
  69         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
  70         struct timeval work_start;
  71         struct timeval work_end;
  72         long timediff;
  73         int rc = 0;
  74         ENTRY;
  75
  76         cfs_gettimeofday(&work_start);
  77         switch (oqctl->qc_cmd) {
  78         case Q_QUOTAON:
  79                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
  80                 rc = mds_quota_on(obd, oqctl);
  81                 break;
  82         case Q_QUOTAOFF:
  83                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
  84                 rc = mds_quota_off(obd, oqctl);
  85                 break;
  86         case Q_SETINFO:
  87                 rc = mds_set_dqinfo(obd, oqctl);
  88                 break;
  89         case Q_GETINFO:
  90                 rc = mds_get_dqinfo(obd, oqctl);
  91                 break;
  92         case Q_SETQUOTA:
  93                 rc = mds_set_dqblk(obd, oqctl);
  94                 break;
  95         case Q_GETQUOTA:
  96                 rc = mds_get_dqblk(obd, oqctl);
  97                 break;
  98         case Q_GETOINFO:
  99         case Q_GETOQUOTA:
 100                 rc = mds_get_obd_quota(obd, oqctl);
 101                 break;
 102         case LUSTRE_Q_INVALIDATE:
 103                 rc = mds_quota_invalidate(obd, oqctl);
 104                 break;
 105         case LUSTRE_Q_FINVALIDATE:
 106                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
 107                 rc = mds_quota_finvalidate(obd, oqctl);
 108                 break;
 109         default:
 110                 CERROR("%s: unsupported mds_quotactl command: %d\n",
 111                        obd->obd_name, oqctl->qc_cmd);
 112                 RETURN(-EFAULT);
 113         }
 114
 115         if (rc)
 116                 CDEBUG(D_INFO, "mds_quotactl admin quota command %d, id %u, "
 117                                "type %d, failed: rc = %d\n",
 118                        oqctl->qc_cmd, oqctl->qc_id, oqctl->qc_type, rc);
 119         cfs_gettimeofday(&work_end);
 120         timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
 121         lprocfs_counter_add(qctxt->lqc_stats, LQUOTA_QUOTA_CTL, timediff);
 122
 123         RETURN(rc);
 124 }
 125
 126 int filter_quota_ctl(struct obd_device *unused, struct obd_export *exp,
 127                      struct obd_quotactl *oqctl)
 128 {
 129         struct obd_device *obd = exp->exp_obd;
 130         struct obd_device_target *obt = &obd->u.obt;
 131         struct lvfs_run_ctxt saved;
 132         struct lustre_quota_ctxt *qctxt = &obt->obt_qctxt;
 133         struct lustre_qunit_size *lqs;
 134         void *handle = NULL;
 135         struct timeval work_start;
 136         struct timeval work_end;
 137         long timediff;
 138         int rc = 0;
 139         ENTRY;
 140
 141         cfs_gettimeofday(&work_start);
 142         switch (oqctl->qc_cmd) {
 143         case Q_QUOTAON:
 144                 oqctl->qc_id = obt->obt_qfmt;
 145                 rc = generic_quota_on(obd, oqctl, 0);
 146                 break;
 147         case Q_FINVALIDATE:
 148         case Q_QUOTAOFF:
 149                 cfs_down(&obt->obt_quotachecking);
 150                 if (oqctl->qc_cmd == Q_FINVALIDATE &&
 151                     (obt->obt_qctxt.lqc_flags & UGQUOTA2LQC(oqctl->qc_type))) {
 152                         CWARN("quota[%u] is on yet\n", oqctl->qc_type);
 153                         cfs_up(&obt->obt_quotachecking);
 154                         rc = -EBUSY;
 155                         break;
 156                 }
 157                 oqctl->qc_id = obt->obt_qfmt; /* override qfmt version */
 158         case Q_GETOINFO:
 159         case Q_GETOQUOTA:
 160         case Q_GETQUOTA:
 161                 /* In recovery scenario, this pending dqacq/dqrel might have
 162                  * been processed by master successfully before it's dquot
 163                  * on master enter recovery mode. We must wait for this
 164                  * dqacq/dqrel done then return the correct limits to master */
 165                 if (oqctl->qc_stat == QUOTA_RECOVERING)
 166                         handle = quota_barrier(&obd->u.obt.obt_qctxt, oqctl, 1);
 167
 168                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 169                 rc = fsfilt_quotactl(obd, obt->obt_sb, oqctl);
 170                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 171
 172                 if (oqctl->qc_stat == QUOTA_RECOVERING)
 173                         quota_unbarrier(handle);
 174
 175                 if (oqctl->qc_cmd == Q_QUOTAOFF ||
 176                     oqctl->qc_cmd == Q_FINVALIDATE) {
 177                         if (oqctl->qc_cmd == Q_QUOTAOFF) {
 178                                 if (!rc)
 179                                         obt->obt_qctxt.lqc_flags &=
 180                                                 ~UGQUOTA2LQC(oqctl->qc_type);
 181                                 else if (quota_is_off(qctxt, oqctl))
 182                                                 rc = -EALREADY;
 183                                 CDEBUG(D_QUOTA, "%s: quotaoff type:flags:rc "
 184                                        "%u:%lu:%d\n", obd->obd_name,
 185                                        oqctl->qc_type, qctxt->lqc_flags, rc);
 186                         }
 187                         cfs_up(&obt->obt_quotachecking);
 188                 }
 189
 190                 break;
 191         case Q_SETQUOTA:
 192                 /* currently, it is only used for nullifying the quota */
 193                 handle = quota_barrier(&obd->u.obt.obt_qctxt, oqctl, 1);
 194
 195                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 196                 rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 197
 198                 if (!rc) {
 199                         oqctl->qc_cmd = Q_SYNC;
 200                         fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 201                         oqctl->qc_cmd = Q_SETQUOTA;
 202                 }
 203                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 204                 quota_unbarrier(handle);
 205
 206                 lqs = quota_search_lqs(LQS_KEY(oqctl->qc_type, oqctl->qc_id),
 207                                        qctxt, 0);
 208                 if (lqs == NULL || IS_ERR(lqs)){
 209                         CERROR("fail to create lqs during setquota operation "
 210                                "for %sid %u\n", oqctl->qc_type ? "g" : "u",
 211                                oqctl->qc_id);
 212                 } else {
 213                         lqs->lqs_flags &= ~QB_SET;
 214                         lqs_putref(lqs);
 215                 }
 216
 217                 break;
 218         case Q_INITQUOTA:
 219                 {
 220                 unsigned int id[MAXQUOTAS] = { 0, 0 };
 221
 222                 /* Initialize quota limit to MIN_QLIMIT */
 223                 LASSERT(oqctl->qc_dqblk.dqb_valid == QIF_BLIMITS);
 224                 LASSERT(oqctl->qc_dqblk.dqb_bsoftlimit == 0);
 225
 226                 if (!oqctl->qc_dqblk.dqb_bhardlimit)
 227                         goto adjust;
 228
 229                /* There might be a pending dqacq/dqrel (which is going to
 230                  * clear stale limits on slave). we should wait for it's
 231                  * completion then initialize limits */
 232                 handle = quota_barrier(&obd->u.obt.obt_qctxt, oqctl, 1);
 233                 LASSERT(oqctl->qc_dqblk.dqb_bhardlimit == MIN_QLIMIT);
 234                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 235                 rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 236
 237                 /* Update on-disk quota, in case of lose the changed limits
 238                  * (MIN_QLIMIT) on crash, which cannot be recovered.*/
 239                 if (!rc) {
 240                         oqctl->qc_cmd = Q_SYNC;
 241                         fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 242                         oqctl->qc_cmd = Q_INITQUOTA;
 243                 }
 244                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 245                 quota_unbarrier(handle);
 246
 247                 if (rc)
 248                         RETURN(rc);
 249 adjust:
 250                 lqs = quota_search_lqs(LQS_KEY(oqctl->qc_type, oqctl->qc_id),
 251                                        qctxt, 1);
 252                 if (lqs == NULL || IS_ERR(lqs)){
 253                         CERROR("fail to create lqs during setquota operation "
 254                                "for %sid %u\n", oqctl->qc_type ? "g" : "u",
 255                                oqctl->qc_id);
 256                         break;
 257                 } else {
 258                         lqs->lqs_flags |= QB_SET;
 259                         lqs_putref(lqs);
 260                 }
 261
 262                 /* Trigger qunit pre-acquire */
 263                 if (oqctl->qc_type == USRQUOTA)
 264                         id[USRQUOTA] = oqctl->qc_id;
 265                 else
 266                         id[GRPQUOTA] = oqctl->qc_id;
 267
 268                 rc = qctxt_adjust_qunit(obd, &obd->u.obt.obt_qctxt,
 269                                         id, 1, 0, NULL);
 270                 if (rc == -EDQUOT || rc == -EBUSY) {
 271                         CDEBUG(D_QUOTA, "rc: %d.\n", rc);
 272                         rc = 0;
 273                 }
 274
 275                 break;
 276                 }
 277         default:
 278                 CERROR("%s: unsupported filter_quotactl command: %d\n",
 279                        obd->obd_name, oqctl->qc_cmd);
 280                 RETURN(-EFAULT);
 281         }
 282         cfs_gettimeofday(&work_end);
 283         timediff = cfs_timeval_sub(&work_end, &work_start, NULL);
 284         lprocfs_counter_add(qctxt->lqc_stats, LQUOTA_QUOTA_CTL, timediff);
 285
 286         RETURN(rc);
 287 }
 288 #endif /* __KERNEL__ */