lustre/osc/osc_quota.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, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 021110-1307, USA
  20  *
  21  * GPL HEADER END
  22  */
  23 /*
  24  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  25  *
  26  * Copyright (c) 2012, Intel Corporation.
  27  *
  28  * Code originally extracted from quota directory
  29  */
  30 #ifndef __KERNEL__
  31 # include <liblustre.h>
  32 #endif
  33
  34 #include <obd_ost.h>
  35 #include "osc_internal.h"
  36
  37 static inline struct osc_quota_info *osc_oqi_alloc(obd_uid id)
  38 {
  39         struct osc_quota_info *oqi;
  40
  41         OBD_SLAB_ALLOC_PTR(oqi, osc_quota_kmem);
  42         if (oqi != NULL)
  43                 oqi->oqi_id = id;
  44
  45         return oqi;
  46 }
  47
  48 int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
  49 {
  50         int type;
  51         ENTRY;
  52
  53         for (type = 0; type < MAXQUOTAS; type++) {
  54                 struct osc_quota_info *oqi;
  55
  56                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
  57                 if (oqi) {
  58                         /* do not try to access oqi here, it could have been
  59                          * freed by osc_quota_setdq() */
  60
  61                         /* the slot is busy, the user is about to run out of
  62                          * quota space on this OST */
  63                         CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
  64                                type == USRQUOTA ? "user" : "grout", qid[type]);
  65                         RETURN(NO_QUOTA);
  66                 }
  67         }
  68
  69         RETURN(QUOTA_OK);
  70 }
  71
  72 #define MD_QUOTA_FLAG(type) ((type == USRQUOTA) ? OBD_MD_FLUSRQUOTA \
  73                                                 : OBD_MD_FLGRPQUOTA)
  74 #define FL_QUOTA_FLAG(type) ((type == USRQUOTA) ? OBD_FL_NO_USRQUOTA \
  75                                                 : OBD_FL_NO_GRPQUOTA)
  76
  77 int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
  78                     obd_flag valid, obd_flag flags)
  79 {
  80         int type;
  81         int rc = 0;
  82         ENTRY;
  83
  84         if ((valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) == 0)
  85                 RETURN(0);
  86
  87         for (type = 0; type < MAXQUOTAS; type++) {
  88                 struct osc_quota_info *oqi;
  89
  90                 if ((valid & MD_QUOTA_FLAG(type)) == 0)
  91                         continue;
  92
  93                 /* lookup the ID in the per-type hash table */
  94                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
  95                 if ((flags & FL_QUOTA_FLAG(type)) != 0) {
  96                         /* This ID is getting close to its quota limit, let's
  97                          * switch to sync I/O */
  98                         if (oqi != NULL)
  99                                 continue;
 100
 101                         oqi = osc_oqi_alloc(qid[type]);
 102                         if (oqi == NULL) {
 103                                 rc = -ENOMEM;
 104                                 break;
 105                         }
 106
 107                         rc = cfs_hash_add_unique(cli->cl_quota_hash[type],
 108                                                  &qid[type], &oqi->oqi_hash);
 109                         /* race with others? */
 110                         if (rc == -EALREADY) {
 111                                 rc = 0;
 112                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 113                         }
 114
 115                         CDEBUG(D_QUOTA, "%s: setdq to insert for %s %d (%d)\n",
 116                                cli->cl_import->imp_obd->obd_name,
 117                                type == USRQUOTA ? "user" : "group",
 118                                qid[type], rc);
 119                 } else {
 120                         /* This ID is now off the hook, let's remove it from
 121                          * the hash table */
 122                         if (oqi == NULL)
 123                                 continue;
 124
 125                         oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
 126                                                &qid[type]);
 127                         if (oqi)
 128                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 129
 130                         CDEBUG(D_QUOTA, "%s: setdq to remove for %s %d (%p)\n",
 131                                cli->cl_import->imp_obd->obd_name,
 132                                type == USRQUOTA ? "user" : "group",
 133                                qid[type], oqi);
 134                 }
 135         }
 136
 137         RETURN(rc);
 138 }
 139
 140 /*
 141  * Hash operations for uid/gid <-> osc_quota_info
 142  */
 143 static unsigned
 144 oqi_hashfn(cfs_hash_t *hs, const void *key, unsigned mask)
 145 {
 146         return cfs_hash_u32_hash(*((__u32*)key), mask);
 147 }
 148
 149 static int
 150 oqi_keycmp(const void *key, cfs_hlist_node_t *hnode)
 151 {
 152         struct osc_quota_info *oqi;
 153         obd_uid uid;
 154
 155         LASSERT(key != NULL);
 156         uid = *((obd_uid*)key);
 157         oqi = cfs_hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 158
 159         return uid == oqi->oqi_id;
 160 }
 161
 162 static void *
 163 oqi_key(cfs_hlist_node_t *hnode)
 164 {
 165         struct osc_quota_info *oqi;
 166         oqi = cfs_hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 167         return &oqi->oqi_id;
 168 }
 169
 170 static void *
 171 oqi_object(cfs_hlist_node_t *hnode)
 172 {
 173         return cfs_hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 174 }
 175
 176 static void
 177 oqi_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
 178 {
 179 }
 180
 181 static void
 182 oqi_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
 183 {
 184 }
 185
 186 static void
 187 oqi_exit(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
 188 {
 189         struct osc_quota_info *oqi;
 190
 191         oqi = cfs_hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 192
 193         OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 194 }
 195
 196 #define HASH_QUOTA_BKT_BITS 5
 197 #define HASH_QUOTA_CUR_BITS 5
 198 #define HASH_QUOTA_MAX_BITS 15
 199
 200 static cfs_hash_ops_t quota_hash_ops = {
 201         .hs_hash        = oqi_hashfn,
 202         .hs_keycmp      = oqi_keycmp,
 203         .hs_key         = oqi_key,
 204         .hs_object      = oqi_object,
 205         .hs_get         = oqi_get,
 206         .hs_put_locked  = oqi_put_locked,
 207         .hs_exit        = oqi_exit,
 208 };
 209
 210 int osc_quota_setup(struct obd_device *obd)
 211 {
 212         struct client_obd *cli = &obd->u.cli;
 213         int i, type;
 214         ENTRY;
 215
 216         for (type = 0; type < MAXQUOTAS; type++) {
 217                 cli->cl_quota_hash[type] = cfs_hash_create("QUOTA_HASH",
 218                                                            HASH_QUOTA_CUR_BITS,
 219                                                            HASH_QUOTA_MAX_BITS,
 220                                                            HASH_QUOTA_BKT_BITS,
 221                                                            0,
 222                                                            CFS_HASH_MIN_THETA,
 223                                                            CFS_HASH_MAX_THETA,
 224                                                            &quota_hash_ops,
 225                                                            CFS_HASH_DEFAULT);
 226                 if (cli->cl_quota_hash[type] == NULL)
 227                         break;
 228         }
 229
 230         if (type == MAXQUOTAS)
 231                 RETURN(0);
 232
 233         for (i = 0; i < type; i++)
 234                 cfs_hash_putref(cli->cl_quota_hash[i]);
 235
 236         RETURN(-ENOMEM);
 237 }
 238
 239 int osc_quota_cleanup(struct obd_device *obd)
 240 {
 241         struct client_obd     *cli = &obd->u.cli;
 242         int type;
 243         ENTRY;
 244
 245         for (type = 0; type < MAXQUOTAS; type++)
 246                 cfs_hash_putref(cli->cl_quota_hash[type]);
 247
 248         RETURN(0);
 249 }
 250
 251 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 252                  struct obd_quotactl *oqctl)
 253 {
 254         struct ptlrpc_request *req;
 255         struct obd_quotactl   *oqc;
 256         int                    rc;
 257         ENTRY;
 258
 259         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 260                                         &RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 261                                         OST_QUOTACTL);
 262         if (req == NULL)
 263                 RETURN(-ENOMEM);
 264
 265         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 266         *oqc = *oqctl;
 267
 268         ptlrpc_request_set_replen(req);
 269         ptlrpc_at_set_req_timeout(req);
 270         req->rq_no_resend = 1;
 271
 272         rc = ptlrpc_queue_wait(req);
 273         if (rc)
 274                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
 275
 276         if (req->rq_repmsg &&
 277             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
 278                 *oqctl = *oqc;
 279         } else if (!rc) {
 280                 CERROR ("Can't unpack obd_quotactl\n");
 281                 rc = -EPROTO;
 282         }
 283         ptlrpc_req_finished(req);
 284
 285         RETURN(rc);
 286 }
 287
 288 int osc_quotacheck(struct obd_device *unused, struct obd_export *exp,
 289                    struct obd_quotactl *oqctl)
 290 {
 291         struct client_obd       *cli = &exp->exp_obd->u.cli;
 292         struct ptlrpc_request   *req;
 293         struct obd_quotactl     *body;
 294         int                      rc;
 295         ENTRY;
 296
 297         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 298                                         &RQF_OST_QUOTACHECK, LUSTRE_OST_VERSION,
 299                                         OST_QUOTACHECK);
 300         if (req == NULL)
 301                 RETURN(-ENOMEM);
 302
 303         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 304         *body = *oqctl;
 305
 306         ptlrpc_request_set_replen(req);
 307
 308         /* the next poll will find -ENODATA, that means quotacheck is
 309          * going on */
 310         cli->cl_qchk_stat = -ENODATA;
 311         rc = ptlrpc_queue_wait(req);
 312         if (rc)
 313                 cli->cl_qchk_stat = rc;
 314         ptlrpc_req_finished(req);
 315         RETURN(rc);
 316 }
 317
 318 int osc_quota_poll_check(struct obd_export *exp, struct if_quotacheck *qchk)
 319 {
 320         struct client_obd *cli = &exp->exp_obd->u.cli;
 321         int rc;
 322         ENTRY;
 323
 324         qchk->obd_uuid = cli->cl_target_uuid;
 325         memcpy(qchk->obd_type, LUSTRE_OST_NAME, strlen(LUSTRE_OST_NAME));
 326
 327         rc = cli->cl_qchk_stat;
 328         /* the client is not the previous one */
 329         if (rc == CL_NOT_QUOTACHECKED)
 330                 rc = -EINTR;
 331         RETURN(rc);
 332 }