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