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, 2017, Intel Corporation.
  27  *
  28  * Code originally extracted from quota directory
  29  */
  30
  31 #include <obd.h>
  32 #include <lustre_osc.h>
  33
  34 #include "osc_internal.h"
  35
  36 static inline struct osc_quota_info *osc_oqi_alloc(u32 id)
  37 {
  38         struct osc_quota_info *oqi;
  39
  40         OBD_SLAB_ALLOC_PTR(oqi, osc_quota_kmem);
  41         if (oqi != NULL)
  42                 oqi->oqi_id = id;
  43
  44         return oqi;
  45 }
  46
  47 int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
  48 {
  49         int type;
  50         ENTRY;
  51
  52         for (type = 0; type < LL_MAXQUOTAS; type++) {
  53                 struct osc_quota_info *oqi;
  54
  55                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
  56                 if (oqi) {
  57                         /* do not try to access oqi here, it could have been
  58                          * freed by osc_quota_setdq() */
  59
  60                         /* the slot is busy, the user is about to run out of
  61                          * quota space on this OST */
  62                         CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
  63                                type == USRQUOTA ? "user" : "grout", qid[type]);
  64                         RETURN(NO_QUOTA);
  65                 }
  66         }
  67
  68         RETURN(QUOTA_OK);
  69 }
  70
  71 static inline u32 md_quota_flag(int qtype)
  72 {
  73         switch (qtype) {
  74         case USRQUOTA:
  75                 return OBD_MD_FLUSRQUOTA;
  76         case GRPQUOTA:
  77                 return OBD_MD_FLGRPQUOTA;
  78         case PRJQUOTA:
  79                 return OBD_MD_FLPRJQUOTA;
  80         default:
  81                 return 0;
  82         }
  83 }
  84
  85 static inline u32 fl_quota_flag(int qtype)
  86 {
  87         switch (qtype) {
  88         case USRQUOTA:
  89                 return OBD_FL_NO_USRQUOTA;
  90         case GRPQUOTA:
  91                 return OBD_FL_NO_GRPQUOTA;
  92         case PRJQUOTA:
  93                 return OBD_FL_NO_PRJQUOTA;
  94         default:
  95                 return 0;
  96         }
  97 }
  98
  99 int osc_quota_setdq(struct client_obd *cli, __u64 xid, const unsigned int qid[],
 100                     u64 valid, u32 flags)
 101 {
 102         int type;
 103         int rc = 0;
 104
 105         ENTRY;
 106
 107         if ((valid & (OBD_MD_FLALLQUOTA)) == 0)
 108                 RETURN(0);
 109
 110         mutex_lock(&cli->cl_quota_mutex);
 111         if (cli->cl_quota_last_xid > xid)
 112                 GOTO(out_unlock, rc);
 113
 114         cli->cl_quota_last_xid = xid;
 115         for (type = 0; type < LL_MAXQUOTAS; type++) {
 116                 struct osc_quota_info *oqi;
 117
 118                 if ((valid & md_quota_flag(type)) == 0)
 119                         continue;
 120
 121                 /* lookup the ID in the per-type hash table */
 122                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
 123                 if ((flags & fl_quota_flag(type)) != 0) {
 124                         /* This ID is getting close to its quota limit, let's
 125                          * switch to sync I/O */
 126                         if (oqi != NULL)
 127                                 continue;
 128
 129                         oqi = osc_oqi_alloc(qid[type]);
 130                         if (oqi == NULL) {
 131                                 rc = -ENOMEM;
 132                                 break;
 133                         }
 134
 135                         rc = cfs_hash_add_unique(cli->cl_quota_hash[type],
 136                                                  &qid[type], &oqi->oqi_hash);
 137                         /* race with others? */
 138                         if (rc == -EALREADY) {
 139                                 rc = 0;
 140                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 141                         }
 142
 143                         CDEBUG(D_QUOTA, "%s: setdq to insert for %s %d (%d)\n",
 144                                cli_name(cli), qtype_name(type), qid[type], rc);
 145                 } else {
 146                         /* This ID is now off the hook, let's remove it from
 147                          * the hash table */
 148                         if (oqi == NULL)
 149                                 continue;
 150
 151                         oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
 152                                                &qid[type]);
 153                         if (oqi)
 154                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 155
 156                         CDEBUG(D_QUOTA, "%s: setdq to remove for %s %d (%p)\n",
 157                                cli_name(cli), qtype_name(type), qid[type], oqi);
 158                 }
 159         }
 160
 161 out_unlock:
 162         mutex_unlock(&cli->cl_quota_mutex);
 163         RETURN(rc);
 164 }
 165
 166 /*
 167  * Hash operations for uid/gid <-> osc_quota_info
 168  */
 169 static unsigned
 170 oqi_hashfn(struct cfs_hash *hs, const void *key, unsigned mask)
 171 {
 172         return cfs_hash_u32_hash(*((__u32*)key), mask);
 173 }
 174
 175 static int
 176 oqi_keycmp(const void *key, struct hlist_node *hnode)
 177 {
 178         struct osc_quota_info *oqi;
 179         u32 uid;
 180
 181         LASSERT(key != NULL);
 182         uid = *((u32 *)key);
 183         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 184
 185         return uid == oqi->oqi_id;
 186 }
 187
 188 static void *
 189 oqi_key(struct hlist_node *hnode)
 190 {
 191         struct osc_quota_info *oqi;
 192         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 193         return &oqi->oqi_id;
 194 }
 195
 196 static void *
 197 oqi_object(struct hlist_node *hnode)
 198 {
 199         return hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 200 }
 201
 202 static void
 203 oqi_get(struct cfs_hash *hs, struct hlist_node *hnode)
 204 {
 205 }
 206
 207 static void
 208 oqi_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
 209 {
 210 }
 211
 212 static void
 213 oqi_exit(struct cfs_hash *hs, struct hlist_node *hnode)
 214 {
 215         struct osc_quota_info *oqi;
 216
 217         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 218
 219         OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 220 }
 221
 222 #define HASH_QUOTA_BKT_BITS 5
 223 #define HASH_QUOTA_CUR_BITS 5
 224 #define HASH_QUOTA_MAX_BITS 15
 225
 226 static struct cfs_hash_ops quota_hash_ops = {
 227         .hs_hash        = oqi_hashfn,
 228         .hs_keycmp      = oqi_keycmp,
 229         .hs_key         = oqi_key,
 230         .hs_object      = oqi_object,
 231         .hs_get         = oqi_get,
 232         .hs_put_locked  = oqi_put_locked,
 233         .hs_exit        = oqi_exit,
 234 };
 235
 236 int osc_quota_setup(struct obd_device *obd)
 237 {
 238         struct client_obd *cli = &obd->u.cli;
 239         int i, type;
 240         ENTRY;
 241
 242         mutex_init(&cli->cl_quota_mutex);
 243
 244         for (type = 0; type < LL_MAXQUOTAS; type++) {
 245                 cli->cl_quota_hash[type] = cfs_hash_create("QUOTA_HASH",
 246                                                            HASH_QUOTA_CUR_BITS,
 247                                                            HASH_QUOTA_MAX_BITS,
 248                                                            HASH_QUOTA_BKT_BITS,
 249                                                            0,
 250                                                            CFS_HASH_MIN_THETA,
 251                                                            CFS_HASH_MAX_THETA,
 252                                                            &quota_hash_ops,
 253                                                            CFS_HASH_DEFAULT);
 254                 if (cli->cl_quota_hash[type] == NULL)
 255                         break;
 256         }
 257
 258         if (type == LL_MAXQUOTAS)
 259                 RETURN(0);
 260
 261         for (i = 0; i < type; i++)
 262                 cfs_hash_putref(cli->cl_quota_hash[i]);
 263
 264         RETURN(-ENOMEM);
 265 }
 266
 267 int osc_quota_cleanup(struct obd_device *obd)
 268 {
 269         struct client_obd     *cli = &obd->u.cli;
 270         int type;
 271         ENTRY;
 272
 273         for (type = 0; type < LL_MAXQUOTAS; type++)
 274                 cfs_hash_putref(cli->cl_quota_hash[type]);
 275
 276         RETURN(0);
 277 }
 278
 279 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 280                  struct obd_quotactl *oqctl)
 281 {
 282         struct ptlrpc_request *req;
 283         struct obd_quotactl   *oqc;
 284         int                    rc;
 285         ENTRY;
 286
 287         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 288                                         &RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 289                                         OST_QUOTACTL);
 290         if (req == NULL)
 291                 RETURN(-ENOMEM);
 292
 293         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 294         *oqc = *oqctl;
 295
 296         ptlrpc_request_set_replen(req);
 297         ptlrpc_at_set_req_timeout(req);
 298         req->rq_no_resend = 1;
 299
 300         rc = ptlrpc_queue_wait(req);
 301         if (rc)
 302                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
 303
 304         if (req->rq_repmsg &&
 305             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
 306                 *oqctl = *oqc;
 307         } else if (!rc) {
 308                 CERROR ("Can't unpack obd_quotactl\n");
 309                 rc = -EPROTO;
 310         }
 311         ptlrpc_req_finished(req);
 312
 313         RETURN(rc);
 314 }