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