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         /* still mark the quots is running out for the old request, because it
 112          * could be processed after the new request at OST, the side effect is
 113          * the following request will be processed synchronously, but it will
 114          * not break the quota enforcement. */
 115         if (cli->cl_quota_last_xid > xid && !(flags & OBD_FL_NO_QUOTA_ALL))
 116                 GOTO(out_unlock, rc);
 117
 118         if (cli->cl_quota_last_xid < xid)
 119                 cli->cl_quota_last_xid = xid;
 120
 121         for (type = 0; type < LL_MAXQUOTAS; type++) {
 122                 struct osc_quota_info *oqi;
 123
 124                 if ((valid & md_quota_flag(type)) == 0)
 125                         continue;
 126
 127                 /* lookup the ID in the per-type hash table */
 128                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
 129                 if ((flags & fl_quota_flag(type)) != 0) {
 130                         /* This ID is getting close to its quota limit, let's
 131                          * switch to sync I/O */
 132                         if (oqi != NULL)
 133                                 continue;
 134
 135                         oqi = osc_oqi_alloc(qid[type]);
 136                         if (oqi == NULL) {
 137                                 rc = -ENOMEM;
 138                                 break;
 139                         }
 140
 141                         rc = cfs_hash_add_unique(cli->cl_quota_hash[type],
 142                                                  &qid[type], &oqi->oqi_hash);
 143                         /* race with others? */
 144                         if (rc == -EALREADY) {
 145                                 rc = 0;
 146                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 147                         }
 148
 149                         CDEBUG(D_QUOTA, "%s: setdq to insert for %s %d (%d)\n",
 150                                cli_name(cli), qtype_name(type), qid[type], rc);
 151                 } else {
 152                         /* This ID is now off the hook, let's remove it from
 153                          * the hash table */
 154                         if (oqi == NULL)
 155                                 continue;
 156
 157                         oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
 158                                                &qid[type]);
 159                         if (oqi)
 160                                 OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 161
 162                         CDEBUG(D_QUOTA, "%s: setdq to remove for %s %d (%p)\n",
 163                                cli_name(cli), qtype_name(type), qid[type], oqi);
 164                 }
 165         }
 166
 167 out_unlock:
 168         mutex_unlock(&cli->cl_quota_mutex);
 169         RETURN(rc);
 170 }
 171
 172 /*
 173  * Hash operations for uid/gid <-> osc_quota_info
 174  */
 175 static unsigned
 176 oqi_hashfn(struct cfs_hash *hs, const void *key, unsigned mask)
 177 {
 178         return cfs_hash_u32_hash(*((__u32*)key), mask);
 179 }
 180
 181 static int
 182 oqi_keycmp(const void *key, struct hlist_node *hnode)
 183 {
 184         struct osc_quota_info *oqi;
 185         u32 uid;
 186
 187         LASSERT(key != NULL);
 188         uid = *((u32 *)key);
 189         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 190
 191         return uid == oqi->oqi_id;
 192 }
 193
 194 static void *
 195 oqi_key(struct hlist_node *hnode)
 196 {
 197         struct osc_quota_info *oqi;
 198         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 199         return &oqi->oqi_id;
 200 }
 201
 202 static void *
 203 oqi_object(struct hlist_node *hnode)
 204 {
 205         return hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 206 }
 207
 208 static void
 209 oqi_get(struct cfs_hash *hs, struct hlist_node *hnode)
 210 {
 211 }
 212
 213 static void
 214 oqi_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
 215 {
 216 }
 217
 218 static void
 219 oqi_exit(struct cfs_hash *hs, struct hlist_node *hnode)
 220 {
 221         struct osc_quota_info *oqi;
 222
 223         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 224
 225         OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
 226 }
 227
 228 #define HASH_QUOTA_BKT_BITS 5
 229 #define HASH_QUOTA_CUR_BITS 5
 230 #define HASH_QUOTA_MAX_BITS 15
 231
 232 static struct cfs_hash_ops quota_hash_ops = {
 233         .hs_hash        = oqi_hashfn,
 234         .hs_keycmp      = oqi_keycmp,
 235         .hs_key         = oqi_key,
 236         .hs_object      = oqi_object,
 237         .hs_get         = oqi_get,
 238         .hs_put_locked  = oqi_put_locked,
 239         .hs_exit        = oqi_exit,
 240 };
 241
 242 int osc_quota_setup(struct obd_device *obd)
 243 {
 244         struct client_obd *cli = &obd->u.cli;
 245         int i, type;
 246         ENTRY;
 247
 248         mutex_init(&cli->cl_quota_mutex);
 249
 250         for (type = 0; type < LL_MAXQUOTAS; type++) {
 251                 cli->cl_quota_hash[type] = cfs_hash_create("QUOTA_HASH",
 252                                                            HASH_QUOTA_CUR_BITS,
 253                                                            HASH_QUOTA_MAX_BITS,
 254                                                            HASH_QUOTA_BKT_BITS,
 255                                                            0,
 256                                                            CFS_HASH_MIN_THETA,
 257                                                            CFS_HASH_MAX_THETA,
 258                                                            &quota_hash_ops,
 259                                                            CFS_HASH_DEFAULT);
 260                 if (cli->cl_quota_hash[type] == NULL)
 261                         break;
 262         }
 263
 264         if (type == LL_MAXQUOTAS)
 265                 RETURN(0);
 266
 267         for (i = 0; i < type; i++)
 268                 cfs_hash_putref(cli->cl_quota_hash[i]);
 269
 270         RETURN(-ENOMEM);
 271 }
 272
 273 int osc_quota_cleanup(struct obd_device *obd)
 274 {
 275         struct client_obd     *cli = &obd->u.cli;
 276         int type;
 277         ENTRY;
 278
 279         for (type = 0; type < LL_MAXQUOTAS; type++)
 280                 cfs_hash_putref(cli->cl_quota_hash[type]);
 281
 282         RETURN(0);
 283 }
 284
 285 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 286                  struct obd_quotactl *oqctl)
 287 {
 288         struct ptlrpc_request *req;
 289         struct obd_quotactl   *oqc;
 290         int                    rc;
 291         ENTRY;
 292
 293         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 294                                         &RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 295                                         OST_QUOTACTL);
 296         if (req == NULL)
 297                 RETURN(-ENOMEM);
 298
 299         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 300         *oqc = *oqctl;
 301
 302         ptlrpc_request_set_replen(req);
 303         ptlrpc_at_set_req_timeout(req);
 304         req->rq_no_resend = 1;
 305
 306         rc = ptlrpc_queue_wait(req);
 307         if (rc)
 308                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
 309
 310         if (req->rq_repmsg &&
 311             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
 312                 *oqctl = *oqc;
 313         } else if (!rc) {
 314                 CERROR ("Can't unpack obd_quotactl\n");
 315                 rc = -EPROTO;
 316         }
 317         ptlrpc_req_finished(req);
 318
 319         RETURN(rc);
 320 }