drivers/staging/lustre/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  * GPL HEADER END
  17  */
  18 /*
  19  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  20  *
  21  * Copyright (c) 2011, 2015, Intel Corporation.
  22  *
  23  * Code originally extracted from quota directory
  24  */
  25
  26 #include "../include/obd_class.h"
  27 #include "osc_internal.h"
  28
  29 static inline struct osc_quota_info *osc_oqi_alloc(u32 id)
  30 {
  31         struct osc_quota_info *oqi;
  32
  33         oqi = kmem_cache_zalloc(osc_quota_kmem, GFP_NOFS);
  34         if (oqi)
  35                 oqi->oqi_id = id;
  36
  37         return oqi;
  38 }
  39
  40 int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
  41 {
  42         int type;
  43
  44         for (type = 0; type < MAXQUOTAS; type++) {
  45                 struct osc_quota_info *oqi;
  46
  47                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
  48                 if (oqi) {
  49                         /* do not try to access oqi here, it could have been
  50                          * freed by osc_quota_setdq()
  51                          */
  52
  53                         /* the slot is busy, the user is about to run out of
  54                          * quota space on this OST
  55                          */
  56                         CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
  57                                type == USRQUOTA ? "user" : "grout", qid[type]);
  58                         return NO_QUOTA;
  59                 }
  60         }
  61
  62         return QUOTA_OK;
  63 }
  64
  65 #define MD_QUOTA_FLAG(type) ((type == USRQUOTA) ? OBD_MD_FLUSRQUOTA \
  66                                                 : OBD_MD_FLGRPQUOTA)
  67 #define FL_QUOTA_FLAG(type) ((type == USRQUOTA) ? OBD_FL_NO_USRQUOTA \
  68                                                 : OBD_FL_NO_GRPQUOTA)
  69
  70 int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
  71                     u32 valid, u32 flags)
  72 {
  73         int type;
  74         int rc = 0;
  75
  76         if ((valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) == 0)
  77                 return 0;
  78
  79         for (type = 0; type < MAXQUOTAS; type++) {
  80                 struct osc_quota_info *oqi;
  81
  82                 if ((valid & MD_QUOTA_FLAG(type)) == 0)
  83                         continue;
  84
  85                 /* lookup the ID in the per-type hash table */
  86                 oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
  87                 if ((flags & FL_QUOTA_FLAG(type)) != 0) {
  88                         /* This ID is getting close to its quota limit, let's
  89                          * switch to sync I/O
  90                          */
  91                         if (oqi)
  92                                 continue;
  93
  94                         oqi = osc_oqi_alloc(qid[type]);
  95                         if (!oqi) {
  96                                 rc = -ENOMEM;
  97                                 break;
  98                         }
  99
 100                         rc = cfs_hash_add_unique(cli->cl_quota_hash[type],
 101                                                  &qid[type], &oqi->oqi_hash);
 102                         /* race with others? */
 103                         if (rc == -EALREADY) {
 104                                 rc = 0;
 105                                 kmem_cache_free(osc_quota_kmem, oqi);
 106                         }
 107
 108                         CDEBUG(D_QUOTA, "%s: setdq to insert for %s %d (%d)\n",
 109                                cli->cl_import->imp_obd->obd_name,
 110                                type == USRQUOTA ? "user" : "group",
 111                                qid[type], rc);
 112                 } else {
 113                         /* This ID is now off the hook, let's remove it from
 114                          * the hash table
 115                          */
 116                         if (!oqi)
 117                                 continue;
 118
 119                         oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
 120                                                &qid[type]);
 121                         if (oqi)
 122                                 kmem_cache_free(osc_quota_kmem, oqi);
 123
 124                         CDEBUG(D_QUOTA, "%s: setdq to remove for %s %d (%p)\n",
 125                                cli->cl_import->imp_obd->obd_name,
 126                                type == USRQUOTA ? "user" : "group",
 127                                qid[type], oqi);
 128                 }
 129         }
 130
 131         return rc;
 132 }
 133
 134 /*
 135  * Hash operations for uid/gid <-> osc_quota_info
 136  */
 137 static unsigned
 138 oqi_hashfn(struct cfs_hash *hs, const void *key, unsigned mask)
 139 {
 140         return cfs_hash_u32_hash(*((__u32 *)key), mask);
 141 }
 142
 143 static int
 144 oqi_keycmp(const void *key, struct hlist_node *hnode)
 145 {
 146         struct osc_quota_info *oqi;
 147         u32 uid;
 148
 149         LASSERT(key);
 150         uid = *((u32 *)key);
 151         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 152
 153         return uid == oqi->oqi_id;
 154 }
 155
 156 static void *
 157 oqi_key(struct hlist_node *hnode)
 158 {
 159         struct osc_quota_info *oqi;
 160
 161         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 162         return &oqi->oqi_id;
 163 }
 164
 165 static void *
 166 oqi_object(struct hlist_node *hnode)
 167 {
 168         return hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 169 }
 170
 171 static void
 172 oqi_get(struct cfs_hash *hs, struct hlist_node *hnode)
 173 {
 174 }
 175
 176 static void
 177 oqi_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
 178 {
 179 }
 180
 181 static void
 182 oqi_exit(struct cfs_hash *hs, struct hlist_node *hnode)
 183 {
 184         struct osc_quota_info *oqi;
 185
 186         oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 187
 188         kmem_cache_free(osc_quota_kmem, oqi);
 189 }
 190
 191 #define HASH_QUOTA_BKT_BITS 5
 192 #define HASH_QUOTA_CUR_BITS 5
 193 #define HASH_QUOTA_MAX_BITS 15
 194
 195 static struct cfs_hash_ops quota_hash_ops = {
 196         .hs_hash        = oqi_hashfn,
 197         .hs_keycmp      = oqi_keycmp,
 198         .hs_key         = oqi_key,
 199         .hs_object      = oqi_object,
 200         .hs_get         = oqi_get,
 201         .hs_put_locked  = oqi_put_locked,
 202         .hs_exit        = oqi_exit,
 203 };
 204
 205 int osc_quota_setup(struct obd_device *obd)
 206 {
 207         struct client_obd *cli = &obd->u.cli;
 208         int i, type;
 209
 210         for (type = 0; type < MAXQUOTAS; type++) {
 211                 cli->cl_quota_hash[type] = cfs_hash_create("QUOTA_HASH",
 212                                                            HASH_QUOTA_CUR_BITS,
 213                                                            HASH_QUOTA_MAX_BITS,
 214                                                            HASH_QUOTA_BKT_BITS,
 215                                                            0,
 216                                                            CFS_HASH_MIN_THETA,
 217                                                            CFS_HASH_MAX_THETA,
 218                                                            &quota_hash_ops,
 219                                                            CFS_HASH_DEFAULT);
 220                 if (!cli->cl_quota_hash[type])
 221                         break;
 222         }
 223
 224         if (type == MAXQUOTAS)
 225                 return 0;
 226
 227         for (i = 0; i < type; i++)
 228                 cfs_hash_putref(cli->cl_quota_hash[i]);
 229
 230         return -ENOMEM;
 231 }
 232
 233 int osc_quota_cleanup(struct obd_device *obd)
 234 {
 235         struct client_obd *cli = &obd->u.cli;
 236         int type;
 237
 238         for (type = 0; type < MAXQUOTAS; type++)
 239                 cfs_hash_putref(cli->cl_quota_hash[type]);
 240
 241         return 0;
 242 }
 243
 244 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 245                  struct obd_quotactl *oqctl)
 246 {
 247         struct ptlrpc_request *req;
 248         struct obd_quotactl *oqc;
 249         int rc;
 250
 251         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 252                                         &RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 253                                         OST_QUOTACTL);
 254         if (!req)
 255                 return -ENOMEM;
 256
 257         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 258         *oqc = *oqctl;
 259
 260         ptlrpc_request_set_replen(req);
 261         ptlrpc_at_set_req_timeout(req);
 262         req->rq_no_resend = 1;
 263
 264         rc = ptlrpc_queue_wait(req);
 265         if (rc)
 266                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
 267
 268         if (req->rq_repmsg) {
 269                 oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 270                 if (oqc) {
 271                         *oqctl = *oqc;
 272                 } else if (!rc) {
 273                         CERROR("Can't unpack obd_quotactl\n");
 274                         rc = -EPROTO;
 275                 }
 276         } else if (!rc) {
 277                 CERROR("Can't unpack obd_quotactl\n");
 278                 rc = -EPROTO;
 279         }
 280         ptlrpc_req_finished(req);
 281
 282         return rc;
 283 }
 284
 285 int osc_quotacheck(struct obd_device *unused, struct obd_export *exp,
 286                    struct obd_quotactl *oqctl)
 287 {
 288         struct client_obd *cli = &exp->exp_obd->u.cli;
 289         struct ptlrpc_request *req;
 290         struct obd_quotactl *body;
 291         int rc;
 292
 293         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 294                                         &RQF_OST_QUOTACHECK, LUSTRE_OST_VERSION,
 295                                         OST_QUOTACHECK);
 296         if (!req)
 297                 return -ENOMEM;
 298
 299         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
 300         *body = *oqctl;
 301
 302         ptlrpc_request_set_replen(req);
 303
 304         /* the next poll will find -ENODATA, that means quotacheck is going on
 305          */
 306         cli->cl_qchk_stat = -ENODATA;
 307         rc = ptlrpc_queue_wait(req);
 308         if (rc)
 309                 cli->cl_qchk_stat = rc;
 310         ptlrpc_req_finished(req);
 311         return rc;
 312 }
 313
 314 int osc_quota_poll_check(struct obd_export *exp, struct if_quotacheck *qchk)
 315 {
 316         struct client_obd *cli = &exp->exp_obd->u.cli;
 317         int rc;
 318
 319         qchk->obd_uuid = cli->cl_target_uuid;
 320         memcpy(qchk->obd_type, LUSTRE_OST_NAME, strlen(LUSTRE_OST_NAME));
 321
 322         rc = cli->cl_qchk_stat;
 323         /* the client is not the previous one */
 324         if (rc == CL_NOT_QUOTACHECKED)
 325                 rc = -EINTR;
 326         return rc;
 327 }