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