lustre/quota/qsd_request.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) 2012, Intel Corporation.
  25  * Use is subject to license terms.
  26  *
  27  * Author: Johann Lombardi <johann.lombardi@intel.com>
  28  * Author: Niu    Yawei    <yawei.niu@intel.com>
  29  */
  30
  31 #ifndef EXPORT_SYMTAB
  32 # define EXPORT_SYMTAB
  33 #endif
  34
  35 #define DEBUG_SUBSYSTEM S_LQUOTA
  36
  37 #include <lustre_net.h>
  38 #include <lustre_import.h>
  39 #include <lustre_dlm.h>
  40 #include <obd_class.h>
  41
  42 #include "qsd_internal.h"
  43
  44 struct qsd_async_args {
  45         struct obd_export     *aa_exp;
  46         struct qsd_qtype_info *aa_qqi;
  47         void                  *aa_arg;
  48         struct lquota_lvb     *aa_lvb;
  49         struct lustre_handle   aa_lockh;
  50         qsd_req_completion_t   aa_completion;
  51 };
  52
  53 /*
  54  * non-intent quota request interpret callback.
  55  *
  56  * \param env    - the environment passed by the caller
  57  * \param req    - the non-intent quota request
  58  * \param arg    - qsd_async_args
  59  * \param rc     - request status
  60  *
  61  * \retval 0     - success
  62  * \retval -ve   - appropriate errors
  63  */
  64 static int qsd_dqacq_interpret(const struct lu_env *env,
  65                                struct ptlrpc_request *req, void *arg, int rc)
  66 {
  67         struct quota_body     *rep_qbody = NULL, *req_qbody;
  68         struct qsd_async_args *aa = (struct qsd_async_args *)arg;
  69         ENTRY;
  70
  71         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
  72         if (rc == 0 || rc == -EDQUOT || rc == -EINPROGRESS)
  73                 rep_qbody = req_capsule_server_get(&req->rq_pill,
  74                                                    &RMF_QUOTA_BODY);
  75         aa->aa_completion(env, aa->aa_qqi, req_qbody, rep_qbody, &aa->aa_lockh,
  76                           NULL, aa->aa_arg, rc);
  77         RETURN(rc);
  78 }
  79
  80 /*
  81  * Send non-intent quota request to master.
  82  *
  83  * \param env    - the environment passed by the caller
  84  * \param exp    - is the export to use to send the acquire RPC
  85  * \param qbody  - quota body to be packed in request
  86  * \param sync   - synchronous or asynchronous
  87  * \param completion - completion callback
  88  * \param qqi    - is the qsd_qtype_info structure to pass to the completion
  89  *                 function
  90  * \param lqe    - is the qid entry to be processed
  91  *
  92  * \retval 0     - success
  93  * \retval -ve   - appropriate errors
  94  */
  95 int qsd_send_dqacq(const struct lu_env *env, struct obd_export *exp,
  96                    struct quota_body *qbody, bool sync,
  97                    qsd_req_completion_t completion, struct qsd_qtype_info *qqi,
  98                    struct lustre_handle *lockh, struct lquota_entry *lqe)
  99 {
 100         struct ptlrpc_request   *req;
 101         struct quota_body       *req_qbody;
 102         struct qsd_async_args   *aa;
 103         int                      rc;
 104         ENTRY;
 105
 106         LASSERT(exp);
 107
 108         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_QUOTA_DQACQ);
 109         if (req == NULL)
 110                 GOTO(out, rc = -ENOMEM);
 111
 112         req->rq_no_resend = req->rq_no_delay = 1;
 113         req->rq_no_retry_einprogress = 1;
 114         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, QUOTA_DQACQ);
 115         if (rc) {
 116                 ptlrpc_request_free(req);
 117                 GOTO(out, rc);
 118         }
 119
 120         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 121         *req_qbody = *qbody;
 122
 123         ptlrpc_request_set_replen(req);
 124
 125         CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
 126         aa = ptlrpc_req_async_args(req);
 127         aa->aa_exp = exp;
 128         aa->aa_qqi = qqi;
 129         aa->aa_arg = (void *)lqe;
 130         aa->aa_completion = completion;
 131         lustre_handle_copy(&aa->aa_lockh, lockh);
 132
 133         if (sync) {
 134                 rc = ptlrpc_queue_wait(req);
 135                 rc = qsd_dqacq_interpret(env, req, aa, rc);
 136                 ptlrpc_req_finished(req);
 137         } else {
 138                 req->rq_interpret_reply = qsd_dqacq_interpret;
 139                 ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
 140         }
 141
 142         RETURN(rc);
 143 out:
 144         completion(env, qqi, qbody, NULL, lockh, NULL, lqe, rc);
 145         return rc;
 146 }
 147
 148 /*
 149  * intent quota request interpret callback.
 150  *
 151  * \param env    - the environment passed by the caller
 152  * \param req    - the intent quota request
 153  * \param arg    - qsd_async_args
 154  * \param rc     - request status
 155  *
 156  * \retval 0     - success
 157  * \retval -ve   - appropriate errors
 158  */
 159 static int qsd_intent_interpret(const struct lu_env *env,
 160                                 struct ptlrpc_request *req, void *arg, int rc)
 161 {
 162         struct lustre_handle     *lockh;
 163         struct quota_body        *rep_qbody = NULL, *req_qbody;
 164         struct ldlm_intent       *lit;
 165         struct qsd_async_args    *aa = (struct qsd_async_args *)arg;
 166         __u64                     flags = LDLM_FL_HAS_INTENT;
 167         ENTRY;
 168
 169         LASSERT(aa->aa_exp);
 170         lockh = &aa->aa_lockh;
 171         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 172         lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
 173
 174         rc = ldlm_cli_enqueue_fini(aa->aa_exp, req, LDLM_PLAIN, 0, LCK_CR,
 175                                    &flags, (void *)aa->aa_lvb,
 176                                    sizeof(struct lquota_lvb), lockh, rc);
 177         if (rc < 0)
 178                 /* the lock has been destroyed, forget about the lock handle */
 179                 memset(lockh, 0, sizeof(*lockh));
 180
 181         if (rc == 0 || rc == -EDQUOT || rc == -EINPROGRESS)
 182                 rep_qbody = req_capsule_server_get(&req->rq_pill,
 183                                                    &RMF_QUOTA_BODY);
 184
 185         aa->aa_completion(env, aa->aa_qqi, req_qbody, rep_qbody, lockh,
 186                           aa->aa_lvb, aa->aa_arg, rc);
 187         RETURN(rc);
 188 }
 189
 190 /*
 191  * Get intent per-ID lock or global-index lock from master.
 192  *
 193  * \param env    - the environment passed by the caller
 194  * \param exp    - is the export to use to send the intent RPC
 195  * \param qbody  - quota body to be packed in request
 196  * \param sync   - synchronous or asynchronous (pre-acquire)
 197  * \param it_op  - IT_QUOTA_DQACQ or IT_QUOTA_CONN
 198  * \param completion - completion callback
 199  * \param qqi    - is the qsd_qtype_info structure to pass to the completion
 200  *                 function
 201  * \param lvb    - is the lvb associated with the lock and returned by the
 202  *                 server
 203  * \param arg    - is an opaq argument passed to the completion callback
 204  *
 205  * \retval 0     - success
 206  * \retval -ve   - appropriate errors
 207  */
 208 int qsd_intent_lock(const struct lu_env *env, struct obd_export *exp,
 209                     struct quota_body *qbody, bool sync, int it_op,
 210                     qsd_req_completion_t completion, struct qsd_qtype_info *qqi,
 211                     struct lquota_lvb *lvb, void *arg)
 212 {
 213         struct qsd_thread_info  *qti = qsd_info(env);
 214         struct ptlrpc_request   *req;
 215         struct qsd_async_args   *aa = NULL;
 216         struct ldlm_intent      *lit;
 217         struct quota_body       *req_qbody;
 218         __u64                    flags = LDLM_FL_HAS_INTENT;
 219         int                      rc;
 220         ENTRY;
 221
 222         LASSERT(exp != NULL);
 223         LASSERT(!lustre_handle_is_used(&qbody->qb_lockh));
 224
 225         memset(&qti->qti_lockh, 0, sizeof(qti->qti_lockh));
 226
 227         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 228                                    &RQF_LDLM_INTENT_QUOTA);
 229         if (req == NULL)
 230                 GOTO(out, rc = -ENOMEM);
 231
 232         req->rq_no_retry_einprogress = 1;
 233         rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
 234         if (rc) {
 235                 ptlrpc_request_free(req);
 236                 GOTO(out, rc);
 237         }
 238
 239         lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
 240         lit->opc = (__u64)it_op;
 241
 242         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 243         *req_qbody = *qbody;
 244
 245         req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
 246                              sizeof(*lvb));
 247         ptlrpc_request_set_replen(req);
 248
 249         switch(it_op) {
 250         case IT_QUOTA_CONN:
 251                 /* build resource name associated with global index */
 252                 fid_build_reg_res_name(&qbody->qb_fid, &qti->qti_resid);
 253
 254                 /* copy einfo template and fill ei_cbdata with qqi pointer */
 255                 memcpy(&qti->qti_einfo, &qsd_glb_einfo, sizeof(qti->qti_einfo));
 256                 qti->qti_einfo.ei_cbdata = qqi;
 257
 258                 /* don't cancel global lock on memory pressure */
 259                 flags |= LDLM_FL_NO_LRU;
 260                 break;
 261         case IT_QUOTA_DQACQ:
 262                 /* build resource name associated for per-ID quota lock */
 263                 fid_build_quota_resid(&qbody->qb_fid, &qbody->qb_id,
 264                                       &qti->qti_resid);
 265
 266                 /* copy einfo template and fill ei_cbdata with lqe pointer */
 267                 memcpy(&qti->qti_einfo, &qsd_id_einfo, sizeof(qti->qti_einfo));
 268                 qti->qti_einfo.ei_cbdata = arg;
 269                 break;
 270         default:
 271                 LASSERTF(0, "invalid it_op %d", it_op);
 272         }
 273
 274         /* build lock enqueue request */
 275         rc = ldlm_cli_enqueue(exp, &req, &qti->qti_einfo, &qti->qti_resid, NULL,
 276                               &flags, (void *)lvb, sizeof(*lvb), LVB_T_LQUOTA,
 277                               &qti->qti_lockh, 1);
 278         if (rc < 0) {
 279                 ptlrpc_req_finished(req);
 280                 GOTO(out, rc);
 281         }
 282
 283         /* grab reference on backend structure for the new lock */
 284         switch(it_op) {
 285         case IT_QUOTA_CONN:
 286                 /* grab reference on qqi for new lock */
 287 #ifdef USE_LU_REF
 288                 struct ldlm_lock        *lock;
 289
 290                 lock = ldlm_handle2lock(&qti->qti_lockh);
 291                 if (lock == NULL) {
 292                         ptlrpc_req_finished(req);
 293                         GOTO(out, -ENOLCK);
 294                 }
 295                 lu_ref_add(&qqi->qqi_reference, "glb_lock", lock);
 296                 LDLM_LOCK_PUT(lock);
 297 #endif
 298                 qqi_getref(qqi);
 299                 break;
 300         case IT_QUOTA_DQACQ:
 301                 /* grab reference on lqe for new lock */
 302                 lqe_getref((struct lquota_entry *)arg);
 303                 /* all acquire/release request are sent with no_resend and
 304                  * no_delay flag */
 305                 req->rq_no_resend = req->rq_no_delay = 1;
 306                 break;
 307         default:
 308                 break;
 309         }
 310
 311         CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
 312         aa = ptlrpc_req_async_args(req);
 313         aa->aa_exp = exp;
 314         aa->aa_qqi = qqi;
 315         aa->aa_arg = arg;
 316         aa->aa_lvb = lvb;
 317         aa->aa_completion = completion;
 318         lustre_handle_copy(&aa->aa_lockh, &qti->qti_lockh);
 319
 320         if (sync) {
 321                 /* send lock enqueue request and wait for completion */
 322                 rc = ptlrpc_queue_wait(req);
 323                 rc = qsd_intent_interpret(env, req, aa, rc);
 324                 ptlrpc_req_finished(req);
 325         } else {
 326                 /* queue lock request and return */
 327                 req->rq_interpret_reply = qsd_intent_interpret;
 328                 ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
 329         }
 330
 331         RETURN(rc);
 332 out:
 333         completion(env, qqi, qbody, NULL, &qti->qti_lockh, lvb, arg, rc);
 334         return rc;
 335 }
 336
 337 /*
 338  * Fetch a global or slave index from the QMT.
 339  *
 340  * \param env    - the environment passed by the caller
 341  * \param exp    - is the export to use to issue the OBD_IDX_READ RPC
 342  * \param ii     - is the index information to be packed in the request
 343  *                 on success, the index information returned by the server
 344  *                 is copied there.
 345  * \param npages - is the number of pages in the pages array
 346  * \param pages  - is an array of @npages pages
 347  *
 348  * \retval 0     - success
 349  * \retval -ve   - appropriate errors
 350  */
 351 int qsd_fetch_index(const struct lu_env *env, struct obd_export *exp,
 352                     struct idx_info *ii, unsigned int npages,
 353                     cfs_page_t **pages, bool *need_swab)
 354 {
 355         struct ptlrpc_request   *req;
 356         struct idx_info         *req_ii;
 357         struct ptlrpc_bulk_desc *desc;
 358         int                      rc, i;
 359         ENTRY;
 360
 361         LASSERT(exp);
 362
 363         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OBD_IDX_READ);
 364         if (req == NULL)
 365                 RETURN(-ENOMEM);
 366
 367         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, OBD_IDX_READ);
 368         if (rc) {
 369                 ptlrpc_request_free(req);
 370                 RETURN(rc);
 371         }
 372
 373         req->rq_request_portal = MDS_READPAGE_PORTAL;
 374         ptlrpc_at_set_req_timeout(req);
 375
 376         /* allocate bulk descriptor */
 377         desc = ptlrpc_prep_bulk_imp(req, npages, BULK_PUT_SINK,
 378                                     MDS_BULK_PORTAL);
 379         if (desc == NULL) {
 380                 ptlrpc_request_free(req);
 381                 RETURN(-ENOMEM);
 382         }
 383
 384         /* req now owns desc and will free it when it gets freed */
 385         for (i = 0; i < npages; i++)
 386                 ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, CFS_PAGE_SIZE);
 387
 388         /* pack index information in request */
 389         req_ii = req_capsule_client_get(&req->rq_pill, &RMF_IDX_INFO);
 390         *req_ii = *ii;
 391
 392         ptlrpc_request_set_replen(req);
 393
 394         /* send request to master and wait for RPC to complete */
 395         rc = ptlrpc_queue_wait(req);
 396         if (rc)
 397                 GOTO(out, rc);
 398
 399         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
 400                                           req->rq_bulk->bd_nob_transferred);
 401         if (rc < 0)
 402                 GOTO(out, rc);
 403         rc = 0;
 404
 405         req_ii = req_capsule_server_get(&req->rq_pill, &RMF_IDX_INFO);
 406         *ii = *req_ii;
 407
 408         *need_swab = ptlrpc_rep_need_swab(req);
 409
 410         EXIT;
 411 out:
 412         ptlrpc_req_finished(req);
 413         return rc;
 414 }