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         up(qta->qta_sem);
 119         OBD_FREE_PTR(qta);
 120         return rc;
 121 }
 122
 123 int target_quota_check(struct obd_device *obd, struct obd_export *exp,
 124                        struct obd_quotactl *oqctl)
 125 {
 126         struct obd_device_target *obt = &obd->u.obt;
 127         struct quotacheck_thread_args *qta;
 128         int rc = 0;
 129         ENTRY;
 130
 131         OBD_ALLOC_PTR(qta);
 132         if (!qta)
 133                 RETURN(ENOMEM);
 134
 135         down(&obt->obt_quotachecking);
 136
 137         qta->qta_exp = exp;
 138         qta->qta_obd = obd;
 139         qta->qta_oqctl = *oqctl;
 140         qta->qta_oqctl.qc_id = obt->obt_qfmt; /* override qfmt version */
 141         qta->qta_sb = obt->obt_sb;
 142         qta->qta_sem = &obt->obt_quotachecking;
 143
 144         if (!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME)) {
 145                 /* quota master */
 146                 rc = init_admin_quotafiles(obd, &qta->qta_oqctl);
 147                 if (rc) {
 148                         CERROR("init_admin_quotafiles failed: %d\n", rc);
 149                         GOTO(out, rc);
 150                 }
 151         }
 152
 153         /* we get ref for exp because target_quotacheck_callback() will use this
 154          * export later b=18126 */
 155         class_export_get(exp);
 156         rc = kernel_thread(target_quotacheck_thread, qta, CLONE_VM|CLONE_FILES);
 157         if (rc >= 0) {
 158                 CDEBUG(D_INFO, "%s: target_quotacheck_thread: %d\n",
 159                        obd->obd_name, rc);
 160                 RETURN(0);
 161         } else {
 162                 CERROR("%s: error starting quotacheck_thread: %d\n",
 163                        obd->obd_name, rc);
 164                 class_export_put(exp);
 165                 EXIT;
 166         }
 167
 168 out:
 169         up(&obt->obt_quotachecking);
 170         OBD_FREE_PTR(qta);
 171         return rc;
 172 }
 173
 174 #endif /* __KERNEL__ */
 175 #endif /* HAVE_QUOTA_SUPPORT */
 176
 177 int client_quota_check(struct obd_device *unused, struct obd_export *exp,
 178                        struct obd_quotactl *oqctl)
 179 {
 180         struct client_obd       *cli = &exp->exp_obd->u.cli;
 181         struct ptlrpc_request   *req;
 182         struct obd_quotactl     *body;
 183         const struct req_format *rf;
 184         int                      ver, opc, rc;
 185         ENTRY;
 186
 187         if (!strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 188                 rf  = &RQF_MDS_QUOTACHECK;
 189                 ver = LUSTRE_MDS_VERSION;
 190                 opc = MDS_QUOTACHECK;
 191         } else if (!strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 192                 rf  = &RQF_OST_QUOTACHECK;
 193                 ver = LUSTRE_OST_VERSION;
 194                 opc = OST_QUOTACHECK;
 195         } else {
 196                 RETURN(-EINVAL);
 197         }
 198
 199         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), rf, ver, opc);
 200         if (req == NULL)
 201                 RETURN(-ENOMEM);
 202
 203         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 204         *body = *oqctl;
 205
 206         ptlrpc_request_set_replen(req);
 207
 208         /* the next poll will find -ENODATA, that means quotacheck is
 209          * going on */
 210         cli->cl_qchk_stat = -ENODATA;
 211         rc = ptlrpc_queue_wait(req);
 212         if (rc)
 213                 cli->cl_qchk_stat = rc;
 214         ptlrpc_req_finished(req);
 215         RETURN(rc);
 216 }
 217
 218 int client_quota_poll_check(struct obd_export *exp, struct if_quotacheck *qchk)
 219 {
 220         struct client_obd *cli = &exp->exp_obd->u.cli;
 221         int rc;
 222         ENTRY;
 223
 224         rc = cli->cl_qchk_stat;
 225
 226         /* the client is not the previous one */
 227         if (rc == CL_NOT_QUOTACHECKED)
 228                 rc = -EINTR;
 229
 230         qchk->obd_uuid = cli->cl_target_uuid;
 231         /* FIXME change strncmp to strcmp and save the strlen op */
 232         if (strncmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME,
 233                     strlen(LUSTRE_OSC_NAME)) == 0)
 234                 memcpy(qchk->obd_type, LUSTRE_OST_NAME,
 235                        strlen(LUSTRE_OST_NAME));
 236         else if (strncmp(exp->exp_obd->obd_type->typ_name, LUSTRE_MDC_NAME,
 237                          strlen(LUSTRE_MDC_NAME)) == 0)
 238                 memcpy(qchk->obd_type, LUSTRE_MDS_NAME,
 239                        strlen(LUSTRE_MDS_NAME));
 240
 241         RETURN(rc);
 242 }
 243
 244 int lmv_quota_check(struct obd_device *unused, struct obd_export *exp,
 245                     struct obd_quotactl *oqctl)
 246 {
 247         struct obd_device *obd = class_exp2obd(exp);
 248         struct lmv_obd *lmv = &obd->u.lmv;
 249         struct lmv_tgt_desc *tgt;
 250         int i, rc = 0;
 251         ENTRY;
 252
 253         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 254                 int err;
 255
 256                 if (!tgt->ltd_active) {
 257                         CERROR("lmv idx %d inactive\n", i);
 258                         RETURN(-EIO);
 259                 }
 260
 261                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
 262                 if (err && !rc)
 263                         rc = err;
 264         }
 265
 266         RETURN(rc);
 267 }
 268
 269 int lov_quota_check(struct obd_device *unused, struct obd_export *exp,
 270                     struct obd_quotactl *oqctl)
 271 {
 272         struct obd_device *obd = class_exp2obd(exp);
 273         struct lov_obd *lov = &obd->u.lov;
 274         int i, rc = 0;
 275         ENTRY;
 276
 277         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 278                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) {
 279                         CERROR("lov idx %d inactive\n", i);
 280                         RETURN(-EIO);
 281                 }
 282         }
 283
 284         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 285                 int err;
 286
 287                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
 288                 if (err && !rc)
 289                         rc = err;
 290         }
 291
 292         RETURN(rc);
 293 }