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