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 #ifndef EXPORT_SYMTAB
  37 # define EXPORT_SYMTAB
  38 #endif
  39 #define DEBUG_SUBSYSTEM S_MDS
  40
  41 #ifdef __KERNEL__
  42 # include <linux/version.h>
  43 # include <linux/module.h>
  44 # include <linux/init.h>
  45 # include <linux/fs.h>
  46 # include <linux/jbd.h>
  47 # include <linux/ext3_fs.h>
  48 # include <linux/smp_lock.h>
  49 # include <linux/buffer_head.h>
  50 # include <linux/workqueue.h>
  51 # include <linux/mount.h>
  52 #else /* __KERNEL__ */
  53 # include <liblustre.h>
  54 #endif
  55
  56 #include <obd_class.h>
  57 #include <lustre_mds.h>
  58 #include <lustre_dlm.h>
  59 #include <lustre_cfg.h>
  60 #include <obd_ost.h>
  61 #include <lustre_fsfilt.h>
  62 #include <lustre_quota.h>
  63 #include "quota_internal.h"
  64
  65 #ifdef __KERNEL__
  66 static int target_quotacheck_callback(struct obd_export *exp,
  67                                       struct obd_quotactl *oqctl)
  68 {
  69         struct ptlrpc_request *req;
  70         struct obd_quotactl   *body;
  71         int                    rc;
  72         ENTRY;
  73
  74         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_QC_CALLBACK,
  75                                         LUSTRE_OBD_VERSION, OBD_QC_CALLBACK);
  76         if (req == NULL)
  77                 RETURN(-ENOMEM);
  78
  79         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
  80         *body = *oqctl;
  81
  82         ptlrpc_request_set_replen(req);
  83
  84         rc = ptlrpc_queue_wait(req);
  85         ptlrpc_req_finished(req);
  86
  87         RETURN(rc);
  88 }
  89
  90 static int target_quotacheck_thread(void *data)
  91 {
  92         struct quotacheck_thread_args *qta = data;
  93         struct obd_export *exp;
  94         struct obd_device *obd;
  95         struct obd_quotactl *oqctl;
  96         struct lvfs_run_ctxt saved;
  97         int rc;
  98
  99         ptlrpc_daemonize("quotacheck");
 100
 101         exp = qta->qta_exp;
 102         obd = exp->exp_obd;
 103         oqctl = &qta->qta_oqctl;
 104
 105         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 106
 107         rc = fsfilt_quotacheck(obd, qta->qta_sb, oqctl);
 108         if (rc)
 109                 CERROR("%s: fsfilt_quotacheck: %d\n", obd->obd_name, rc);
 110
 111         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 112
 113         rc = target_quotacheck_callback(exp, oqctl);
 114
 115         atomic_inc(qta->qta_sem);
 116
 117         OBD_FREE_PTR(qta);
 118         return rc;
 119 }
 120
 121 int target_quota_check(struct obd_export *exp, struct obd_quotactl *oqctl)
 122 {
 123         struct obd_device *obd = exp->exp_obd;
 124         struct obd_device_target *obt = &obd->u.obt;
 125         struct quotacheck_thread_args *qta;
 126         int rc = 0;
 127         ENTRY;
 128
 129         if (!atomic_dec_and_test(&obt->obt_quotachecking)) {
 130                 CDEBUG(D_INFO, "other people are doing quotacheck\n");
 131                 GOTO(out, rc = -EBUSY);
 132         }
 133
 134         OBD_ALLOC_PTR(qta);
 135         if (!qta)
 136                 GOTO(out, rc = -ENOMEM);
 137
 138         qta->qta_exp = exp;
 139         qta->qta_oqctl = *oqctl;
 140         qta->qta_sb = obt->obt_sb;
 141         qta->qta_sem = &obt->obt_quotachecking;
 142
 143         if (!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME)) {
 144                 /* quota master */
 145                 rc = init_admin_quotafiles(obd, &qta->qta_oqctl);
 146                 if (rc) {
 147                         CERROR("init_admin_quotafiles failed: %d\n", rc);
 148                         OBD_FREE_PTR(qta);
 149                         GOTO(out, rc);
 150                 }
 151         }
 152
 153         rc = kernel_thread(target_quotacheck_thread, qta, CLONE_VM|CLONE_FILES);
 154         if (rc >= 0) {
 155                 CDEBUG(D_INFO, "%s: target_quotacheck_thread: %d\n",
 156                        obd->obd_name, rc);
 157                 RETURN(0);
 158         }
 159
 160         CERROR("%s: error starting quotacheck_thread: %d\n",
 161                obd->obd_name, rc);
 162         OBD_FREE_PTR(qta);
 163 out:
 164         atomic_inc(&obt->obt_quotachecking);
 165         RETURN(rc);
 166 }
 167
 168 #endif /* __KERNEL__ */
 169
 170 int client_quota_check(struct obd_export *exp, struct obd_quotactl *oqctl)
 171 {
 172         struct client_obd     *cli = &exp->exp_obd->u.cli;
 173         struct ptlrpc_request *req;
 174         struct obd_quotactl   *body;
 175         int                    ver, opc, rc;
 176         ENTRY;
 177
 178         if (!strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 179                 ver = LUSTRE_MDS_VERSION;
 180                 opc = MDS_QUOTACHECK;
 181         } else if (!strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 182                 ver = LUSTRE_OST_VERSION;
 183                 opc = OST_QUOTACHECK;
 184         } else {
 185                 RETURN(-EINVAL);
 186         }
 187
 188         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 189                                         &RQF_MDS_QUOTACHECK, ver, opc);
 190         if (req == NULL)
 191                 RETURN(-ENOMEM);
 192
 193         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 194         *body = *oqctl;
 195
 196         ptlrpc_request_set_replen(req);
 197
 198         /* the next poll will find -ENODATA, that means quotacheck is
 199          * going on */
 200         cli->cl_qchk_stat = -ENODATA;
 201         rc = ptlrpc_queue_wait(req);
 202         if (rc)
 203                 cli->cl_qchk_stat = rc;
 204         ptlrpc_req_finished(req);
 205         RETURN(rc);
 206 }
 207
 208 int client_quota_poll_check(struct obd_export *exp, struct if_quotacheck *qchk)
 209 {
 210         struct client_obd *cli = &exp->exp_obd->u.cli;
 211         int rc;
 212         ENTRY;
 213
 214         rc = cli->cl_qchk_stat;
 215
 216         /* the client is not the previous one */
 217         if (rc == CL_NOT_QUOTACHECKED)
 218                 rc = -EINTR;
 219
 220         qchk->obd_uuid = cli->cl_target_uuid;
 221         /* FIXME change strncmp to strcmp and save the strlen op */
 222         if (strncmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME,
 223             strlen(LUSTRE_OSC_NAME)))
 224                 memcpy(qchk->obd_type, LUSTRE_OST_NAME,
 225                        strlen(LUSTRE_OST_NAME));
 226         else if (strncmp(exp->exp_obd->obd_type->typ_name, LUSTRE_MDC_NAME,
 227                  strlen(LUSTRE_MDC_NAME)))
 228                 memcpy(qchk->obd_type, LUSTRE_MDS_NAME,
 229                        strlen(LUSTRE_MDS_NAME));
 230
 231         RETURN(rc);
 232 }
 233
 234 int lov_quota_check(struct obd_export *exp, struct obd_quotactl *oqctl)
 235 {
 236         struct obd_device *obd = class_exp2obd(exp);
 237         struct lov_obd *lov = &obd->u.lov;
 238         int i, rc = 0;
 239         ENTRY;
 240
 241         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 242                 int err;
 243
 244                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) {
 245                         CERROR("lov idx %d inactive\n", i);
 246                         RETURN(-EIO);
 247                 }
 248
 249                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
 250                 if (err && lov->lov_tgts[i]->ltd_active && !rc)
 251                         rc = err;
 252         }
 253
 254         RETURN(rc);
 255 }