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