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