lustre/quota/quota_check.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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         ptlrpc_daemonize("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
 119         atomic_inc(qta->qta_sem);
 120
 121         OBD_FREE_PTR(qta);
 122         return rc;
 123 }
 124
 125 int target_quota_check(struct obd_device *obd, struct obd_export *exp,
 126                        struct obd_quotactl *oqctl)
 127 {
 128         struct obd_device_target *obt = &obd->u.obt;
 129         struct quotacheck_thread_args *qta;
 130         int rc = 0;
 131         ENTRY;
 132
 133         if (!atomic_dec_and_test(&obt->obt_quotachecking)) {
 134                 CDEBUG(D_INFO, "other people are doing quotacheck\n");
 135                 GOTO(out, rc = -EBUSY);
 136         }
 137
 138         OBD_ALLOC_PTR(qta);
 139         if (!qta)
 140                 GOTO(out, rc = -ENOMEM);
 141
 142         qta->qta_exp = exp;
 143         qta->qta_obd = obd;
 144         qta->qta_oqctl = *oqctl;
 145         qta->qta_oqctl.qc_id = obt->obt_qfmt; /* override qfmt version */
 146         qta->qta_sb = obt->obt_sb;
 147         qta->qta_sem = &obt->obt_quotachecking;
 148
 149         if (!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME)) {
 150                 /* quota master */
 151                 rc = init_admin_quotafiles(obd, &qta->qta_oqctl);
 152                 if (rc) {
 153                         CERROR("init_admin_quotafiles failed: %d\n", rc);
 154                         OBD_FREE_PTR(qta);
 155                         GOTO(out, rc);
 156                 }
 157         }
 158
 159         /* we get ref for exp because target_quotacheck_callback() will use this
 160          * export later b=18126 */
 161         class_export_get(exp);
 162         rc = kernel_thread(target_quotacheck_thread, qta, CLONE_VM|CLONE_FILES);
 163         if (rc >= 0) {
 164                 CDEBUG(D_INFO, "%s: target_quotacheck_thread: %d\n",
 165                        obd->obd_name, rc);
 166                 RETURN(0);
 167         }
 168
 169         class_export_put(exp);
 170         CERROR("%s: error starting quotacheck_thread: %d\n",
 171                obd->obd_name, rc);
 172         OBD_FREE_PTR(qta);
 173 out:
 174         atomic_inc(&obt->obt_quotachecking);
 175         RETURN(rc);
 176 }
 177
 178 #endif /* __KERNEL__ */
 179 #endif /* HAVE_QUOTA_SUPPORT */
 180
 181 int client_quota_check(struct obd_device *unused, struct obd_export *exp,
 182                        struct obd_quotactl *oqctl)
 183 {
 184         struct client_obd       *cli = &exp->exp_obd->u.cli;
 185         struct ptlrpc_request   *req;
 186         struct obd_quotactl     *body;
 187         const struct req_format *rf;
 188         int                      ver, opc, rc;
 189         ENTRY;
 190
 191         if (!strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 192                 rf  = &RQF_MDS_QUOTACHECK;
 193                 ver = LUSTRE_MDS_VERSION;
 194                 opc = MDS_QUOTACHECK;
 195         } else if (!strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 196                 rf  = &RQF_OST_QUOTACHECK;
 197                 ver = LUSTRE_OST_VERSION;
 198                 opc = OST_QUOTACHECK;
 199         } else {
 200                 RETURN(-EINVAL);
 201         }
 202
 203         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), rf, ver, opc);
 204         if (req == NULL)
 205                 RETURN(-ENOMEM);
 206
 207         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 208         *body = *oqctl;
 209
 210         ptlrpc_request_set_replen(req);
 211
 212         /* the next poll will find -ENODATA, that means quotacheck is
 213          * going on */
 214         cli->cl_qchk_stat = -ENODATA;
 215         rc = ptlrpc_queue_wait(req);
 216         if (rc)
 217                 cli->cl_qchk_stat = rc;
 218         ptlrpc_req_finished(req);
 219         RETURN(rc);
 220 }
 221
 222 int client_quota_poll_check(struct obd_export *exp, struct if_quotacheck *qchk)
 223 {
 224         struct client_obd *cli = &exp->exp_obd->u.cli;
 225         int rc;
 226         ENTRY;
 227
 228         rc = cli->cl_qchk_stat;
 229
 230         /* the client is not the previous one */
 231         if (rc == CL_NOT_QUOTACHECKED)
 232                 rc = -EINTR;
 233
 234         qchk->obd_uuid = cli->cl_target_uuid;
 235         /* FIXME change strncmp to strcmp and save the strlen op */
 236         if (strncmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME,
 237                     strlen(LUSTRE_OSC_NAME)) == 0)
 238                 memcpy(qchk->obd_type, LUSTRE_OST_NAME,
 239                        strlen(LUSTRE_OST_NAME));
 240         else if (strncmp(exp->exp_obd->obd_type->typ_name, LUSTRE_MDC_NAME,
 241                          strlen(LUSTRE_MDC_NAME)) == 0)
 242                 memcpy(qchk->obd_type, LUSTRE_MDS_NAME,
 243                        strlen(LUSTRE_MDS_NAME));
 244
 245         RETURN(rc);
 246 }
 247
 248 int lmv_quota_check(struct obd_device *unused, struct obd_export *exp,
 249                     struct obd_quotactl *oqctl)
 250 {
 251         struct obd_device *obd = class_exp2obd(exp);
 252         struct lmv_obd *lmv = &obd->u.lmv;
 253         struct lmv_tgt_desc *tgt;
 254         int i, rc = 0;
 255         ENTRY;
 256
 257         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 258                 int err;
 259
 260                 if (!tgt->ltd_active) {
 261                         CERROR("lmv idx %d inactive\n", i);
 262                         RETURN(-EIO);
 263                 }
 264
 265                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
 266                 if (err && !rc)
 267                         rc = err;
 268         }
 269
 270         RETURN(rc);
 271 }
 272
 273 int lov_quota_check(struct obd_device *unused, struct obd_export *exp,
 274                     struct obd_quotactl *oqctl)
 275 {
 276         struct obd_device *obd = class_exp2obd(exp);
 277         struct lov_obd *lov = &obd->u.lov;
 278         int i, rc = 0;
 279         ENTRY;
 280
 281         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 282                 int err;
 283
 284                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) {
 285                         CERROR("lov idx %d inactive\n", i);
 286                         RETURN(-EIO);
 287                 }
 288
 289                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
 290                 if (err && !rc)
 291                         rc = err;
 292         }
 293
 294         RETURN(rc);
 295 }