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, 2015, Intel Corporation.
  27  *
  28  * Code originally extracted from quota directory
  29  */
  30
  31 #include <obd.h>
  32 #include "osc_internal.h"
  33
  34 static inline struct osc_quota_info *osc_oqi_alloc(u32 id)
  35 {
  36         struct osc_quota_info *oqi;
  37
  38         OBD_SLAB_ALLOC_PTR(oqi, osc_quota_kmem);
  39         if (oqi != NULL)
  40                 oqi->oqi_id = id;
  41
  42         return oqi;
  43 }
  44
  45 int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
  46 {
  47         int type;
  48         ENTRY;
  49
  50         for (type = 0; type < LL_MAXQUOTAS; type++) {
  51                 struct osc_quota_info *oqi;
  52
  53                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
  54                 if (oqi) {
  55                         /* do not try to access oqi here, it could have been
  56                          * freed by osc_quota_setdq() */
  57
  58                         /* the slot is busy, the user is about to run out of
  59                          * quota space on this OST */
  60                         CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
  61                                type == USRQUOTA ? "user" : "grout", qid[type]);
  62                         RETURN(NO_QUOTA);
  63                 }
  64         }
  65
  66         RETURN(QUOTA_OK);
  67 }
  68
  69 static inline u32 md_quota_flag(int qtype)
  70 {
  71         switch (qtype) {
  72         case USRQUOTA:
  73                 return OBD_MD_FLUSRQUOTA;
  74         case GRPQUOTA:
  75                 return OBD_MD_FLGRPQUOTA;
  76         case PRJQUOTA:
  77                 return OBD_MD_FLPRJQUOTA;
  78         default:
  79                 return 0;
  80         }
  81 }
  82
  83 static inline u32 fl_quota_flag(int qtype)
  84 {
  85         switch (qtype) {
  86         case USRQUOTA:
  87                 return OBD_FL_NO_USRQUOTA;
  88         case GRPQUOTA:
  89                 return OBD_FL_NO_GRPQUOTA;
  90         case PRJQUOTA:
  91                 return OBD_FL_NO_PRJQUOTA;
  92         default:
  93                 return 0;
  94         }
  95 }
  96
  97 int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
  98                     u64 valid, u32 flags)
  99 {
 100         int type;
 101         int rc = 0;
 102
 103         ENTRY;
 104
 105         if ((valid & (OBD_MD_FLALLQUOTA)) == 0)
 106                 RETURN(0);
 107
 108         for (type = 0; type < LL_MAXQUOTAS; type++) {
 109                 struct osc_quota_info *oqi;
 110
 111                 if ((valid & md_quota_flag(type)) == 0)
 112                         continue;
 113
 114                 /* lookup the ID in the per-type hash table */
 115                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
 116                 if ((flags & fl_quota_flag(type)) != 0) {
 117                         /* This ID is getting close to its quota limit, let's
 118                          * switch to sync I/O */
 119                         if (oqi != NULL)
 120                                 continue;
 121
 122                         oqi = osc_oqi_alloc(qid[type]);
 123                         if (oqi == NULL) {
 124                                 rc = -ENOMEM;
 125                                 break;
 126                         }
 127
 128                         rc = cfs_hash_add_unique(cli->cl_quota_hash[type],
 129                                                  &qid[type], &oqi->oqi_hash);
 130                         /* race with others? */
 131                         if (rc == -EALREADY) {
 132                                 rc = 0;
 133                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 134                         }
 135
 136                         CDEBUG(D_QUOTA, "%s: setdq to insert for %s %d (%d)\n",
 137                                cli_name(cli), qtype_name(type), qid[type], rc);
 138                 } else {
 139                         /* This ID is now off the hook, let's remove it from
 140                          * the hash table */
 141                         if (oqi == NULL)
 142                                 continue;
 143
 144                         oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
 145                                                &qid[type]);
 146                         if (oqi)
 147                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 148
 149                         CDEBUG(D_QUOTA, "%s: setdq to remove for %s %d (%p)\n",
 150                                cli_name(cli), qtype_name(type), qid[type], oqi);
 151                 }
 152         }
 153
 154         RETURN(rc);
 155 }
 156
 157 /*
 158  * Hash operations for uid/gid <-> osc_quota_info
 159  */
 160 static unsigned
 161 oqi_hashfn(struct cfs_hash *hs, const void *key, unsigned mask)
 162 {
 163         return cfs_hash_u32_hash(*((__u32*)key), mask);
 164 }
 165
 166 static int
 167 oqi_keycmp(const void *key, struct hlist_node *hnode)
 168 {
 169         struct osc_quota_info *oqi;
 170         u32 uid;
 171
 172         LASSERT(key != NULL);
 173         uid = *((u32 *)key);
 174         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 175
 176         return uid == oqi->oqi_id;
 177 }
 178
 179 static void *
 180 oqi_key(struct hlist_node *hnode)
 181 {
 182         struct osc_quota_info *oqi;
 183         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 184         return &oqi->oqi_id;
 185 }
 186
 187 static void *
 188 oqi_object(struct hlist_node *hnode)
 189 {
 190         return hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 191 }
 192
 193 static void
 194 oqi_get(struct cfs_hash *hs, struct hlist_node *hnode)
 195 {
 196 }
 197
 198 static void
 199 oqi_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
 200 {
 201 }
 202
 203 static void
 204 oqi_exit(struct cfs_hash *hs, struct hlist_node *hnode)
 205 {
 206         struct osc_quota_info *oqi;
 207
 208         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 209
 210         OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 211 }
 212
 213 #define HASH_QUOTA_BKT_BITS 5
 214 #define HASH_QUOTA_CUR_BITS 5
 215 #define HASH_QUOTA_MAX_BITS 15
 216
 217 static struct cfs_hash_ops quota_hash_ops = {
 218         .hs_hash        = oqi_hashfn,
 219         .hs_keycmp      = oqi_keycmp,
 220         .hs_key         = oqi_key,
 221         .hs_object      = oqi_object,
 222         .hs_get         = oqi_get,
 223         .hs_put_locked  = oqi_put_locked,
 224         .hs_exit        = oqi_exit,
 225 };
 226
 227 int osc_quota_setup(struct obd_device *obd)
 228 {
 229         struct client_obd *cli = &obd->u.cli;
 230         int i, type;
 231         ENTRY;
 232
 233         for (type = 0; type < LL_MAXQUOTAS; type++) {
 234                 cli->cl_quota_hash[type] = cfs_hash_create("QUOTA_HASH",
 235                                                            HASH_QUOTA_CUR_BITS,
 236                                                            HASH_QUOTA_MAX_BITS,
 237                                                            HASH_QUOTA_BKT_BITS,
 238                                                            0,
 239                                                            CFS_HASH_MIN_THETA,
 240                                                            CFS_HASH_MAX_THETA,
 241                                                            &quota_hash_ops,
 242                                                            CFS_HASH_DEFAULT);
 243                 if (cli->cl_quota_hash[type] == NULL)
 244                         break;
 245         }
 246
 247         if (type == LL_MAXQUOTAS)
 248                 RETURN(0);
 249
 250         for (i = 0; i < type; i++)
 251                 cfs_hash_putref(cli->cl_quota_hash[i]);
 252
 253         RETURN(-ENOMEM);
 254 }
 255
 256 int osc_quota_cleanup(struct obd_device *obd)
 257 {
 258         struct client_obd     *cli = &obd->u.cli;
 259         int type;
 260         ENTRY;
 261
 262         for (type = 0; type < LL_MAXQUOTAS; type++)
 263                 cfs_hash_putref(cli->cl_quota_hash[type]);
 264
 265         RETURN(0);
 266 }
 267
 268 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 269                  struct obd_quotactl *oqctl)
 270 {
 271         struct ptlrpc_request *req;
 272         struct obd_quotactl   *oqc;
 273         int                    rc;
 274         ENTRY;
 275
 276         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 277                                         &RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 278                                         OST_QUOTACTL);
 279         if (req == NULL)
 280                 RETURN(-ENOMEM);
 281
 282         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 283         *oqc = *oqctl;
 284
 285         ptlrpc_request_set_replen(req);
 286         ptlrpc_at_set_req_timeout(req);
 287         req->rq_no_resend = 1;
 288
 289         rc = ptlrpc_queue_wait(req);
 290         if (rc)
 291                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
 292
 293         if (req->rq_repmsg &&
 294             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
 295                 *oqctl = *oqc;
 296         } else if (!rc) {
 297                 CERROR ("Can't unpack obd_quotactl\n");
 298                 rc = -EPROTO;
 299         }
 300         ptlrpc_req_finished(req);
 301
 302         RETURN(rc);
 303 }