lustre/quota/quota_check.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
  38 #ifndef EXPORT_SYMTAB
  39 # define EXPORT_SYMTAB
  40 #endif
  41 #define DEBUG_SUBSYSTEM S_LQUOTA
  42
  43 #ifdef __KERNEL__
  44 # include <linux/version.h>
  45 # include <linux/module.h>
  46 # include <linux/init.h>
  47 # include <linux/fs.h>
  48 # include <linux/jbd.h>
  49 # include <linux/ext3_fs.h>
  50 # include <linux/smp_lock.h>
  51 # include <linux/buffer_head.h>
  52 # include <linux/workqueue.h>
  53 # include <linux/mount.h>
  54 #else /* __KERNEL__ */
  55 # include <liblustre.h>
  56 #endif
  57
  58 #include <obd_class.h>
  59 #include <lustre_mds.h>
  60 #include <lustre_dlm.h>
  61 #include <lustre_cfg.h>
  62 #include <obd_ost.h>
  63 #include <lustre_fsfilt.h>
  64 #include <lustre_quota.h>
  65 #include "quota_internal.h"
  66
  67 #ifdef HAVE_QUOTA_SUPPORT
  68 #ifdef __KERNEL__
  69 static int target_quotacheck_callback(struct obd_export *exp,
  70                                       struct obd_quotactl *oqctl)
  71 {
  72         struct ptlrpc_request *req;
  73         struct obd_quotactl   *body;
  74         int                    rc;
  75         ENTRY;
  76
  77         req = ptlrpc_request_alloc_pack(exp->exp_imp_reverse, &RQF_QC_CALLBACK,
  78                                         LUSTRE_OBD_VERSION, OBD_QC_CALLBACK);
  79         if (req == NULL)
  80                 RETURN(-ENOMEM);
  81
  82         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
  83         *body = *oqctl;
  84
  85         ptlrpc_request_set_replen(req);
  86
  87         rc = ptlrpc_queue_wait(req);
  88         ptlrpc_req_finished(req);
  89
  90         RETURN(rc);
  91 }
  92
  93 static int target_quotacheck_thread(void *data)
  94 {
  95         struct quotacheck_thread_args *qta = data;
  96         struct obd_export *exp;
  97         struct obd_device *obd;
  98         struct obd_quotactl *oqctl;
  99         struct lvfs_run_ctxt saved;
 100         int rc;
 101
 102         cfs_daemonize_ctxt("quotacheck");
 103
 104         exp = qta->qta_exp;
 105         obd = qta->qta_obd;
 106         oqctl = &qta->qta_oqctl;
 107
 108         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 109
 110         rc = fsfilt_quotacheck(obd, qta->qta_sb, oqctl);
 111         if (rc)
 112                 CERROR("%s: fsfilt_quotacheck: %d\n", obd->obd_name, rc);
 113
 114         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 115
 116         rc = target_quotacheck_callback(exp, oqctl);
 117         class_export_put(exp);
 118         cfs_up(qta->qta_sem);
 119         OBD_FREE_PTR(qta);
 120         return rc;
 121 }
 122
 123 int target_quota_check(struct obd_device *obd, struct obd_export *exp,
 124                        struct obd_quotactl *oqctl)
 125 {
 126         struct obd_device_target *obt = &obd->u.obt;
 127         struct quotacheck_thread_args *qta;
 128         int rc = 0;
 129         ENTRY;
 130
 131         OBD_ALLOC_PTR(qta);
 132         if (!qta)
 133                 RETURN(ENOMEM);
 134
 135         cfs_down(&obt->obt_quotachecking);
 136
 137         qta->qta_exp = exp;
 138         qta->qta_obd = obd;
 139         qta->qta_oqctl = *oqctl;
 140         qta->qta_oqctl.qc_id = obt->obt_qfmt; /* override qfmt version */
 141         qta->qta_sb = obt->obt_sb;
 142         qta->qta_sem = &obt->obt_quotachecking;
 143
 144         /* quotaoff firstly */
 145         oqctl->qc_cmd = Q_QUOTAOFF;
 146         if (!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME)) {
 147                 rc = do_mds_quota_off(obd, oqctl);
 148                 if (rc && rc != -EALREADY) {
 149                         CERROR("off quota on MDS failed: %d\n", rc);
 150                         GOTO(out, rc);
 151                 }
 152
 153                 /* quota master */
 154                 rc = init_admin_quotafiles(obd, &qta->qta_oqctl);
 155                 if (rc) {
 156                         CERROR("init_admin_quotafiles failed: %d\n", rc);
 157                         GOTO(out, rc);
 158                 }
 159         } else {
 160                 struct lvfs_run_ctxt saved;
 161                 struct lustre_quota_ctxt *qctxt = &obt->obt_qctxt;
 162
 163                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 164                 rc = fsfilt_quotactl(obd, obt->obt_sb, oqctl);
 165                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 166                 if (!rc) {
 167                         qctxt->lqc_flags &= ~UGQUOTA2LQC(oqctl->qc_type);
 168                 } else if (!quota_is_off(qctxt, oqctl)) {
 169                         CERROR("off quota on OSS failed: %d\n", rc);
 170                         GOTO(out, rc);
 171                 }
 172         }
 173
 174         /* we get ref for exp because target_quotacheck_callback() will use this
 175          * export later b=18126 */
 176         class_export_get(exp);
 177         rc = cfs_create_thread(target_quotacheck_thread, qta,
 178                                CFS_DAEMON_FLAGS);
 179         if (rc >= 0) {
 180                 /* target_quotacheck_thread will drop the ref on exp and release
 181                  * obt_quotachecking */
 182                 CDEBUG(D_INFO, "%s: target_quotacheck_thread: %d\n",
 183                        obd->obd_name, rc);
 184                 RETURN(0);
 185         } else {
 186                 CERROR("%s: error starting quotacheck_thread: %d\n",
 187                        obd->obd_name, rc);
 188                 class_export_put(exp);
 189                 EXIT;
 190         }
 191
 192 out:
 193         cfs_up(&obt->obt_quotachecking);
 194         OBD_FREE_PTR(qta);
 195         return rc;
 196 }
 197
 198 #endif /* __KERNEL__ */
 199 #endif /* HAVE_QUOTA_SUPPORT */