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, 2016, 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 #define DEBUG_SUBSYSTEM S_LQUOTA
  32
  33 #include <lustre_net.h>
  34 #include <lustre_import.h>
  35 #include <lustre_dlm.h>
  36 #include <obd_class.h>
  37
  38 #include "qsd_internal.h"
  39
  40 struct qsd_async_args {
  41         struct obd_export     *aa_exp;
  42         struct qsd_qtype_info *aa_qqi;
  43         void                  *aa_arg;
  44         struct lquota_lvb     *aa_lvb;
  45         struct lustre_handle   aa_lockh;
  46         qsd_req_completion_t   aa_completion;
  47 };
  48
  49 /*
  50  * non-intent quota request interpret callback.
  51  *
  52  * \param env    - the environment passed by the caller
  53  * \param req    - the non-intent quota request
  54  * \param arg    - qsd_async_args
  55  * \param rc     - request status
  56  *
  57  * \retval 0     - success
  58  * \retval -ve   - appropriate errors
  59  */
  60 static int qsd_dqacq_interpret(const struct lu_env *env,
  61                                struct ptlrpc_request *req, void *arg, int rc)
  62 {
  63         struct quota_body     *rep_qbody = NULL, *req_qbody;
  64         struct qsd_async_args *aa = (struct qsd_async_args *)arg;
  65         ENTRY;
  66
  67         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
  68         if (rc == 0 || rc == -EDQUOT || rc == -EINPROGRESS)
  69                 rep_qbody = req_capsule_server_get(&req->rq_pill,
  70                                                    &RMF_QUOTA_BODY);
  71         aa->aa_completion(env, aa->aa_qqi, req_qbody, rep_qbody, &aa->aa_lockh,
  72                           NULL, aa->aa_arg, rc);
  73         RETURN(rc);
  74 }
  75
  76 /*
  77  * Send non-intent quota request to master.
  78  *
  79  * \param env    - the environment passed by the caller
  80  * \param exp    - is the export to use to send the acquire RPC
  81  * \param qbody  - quota body to be packed in request
  82  * \param sync   - synchronous or asynchronous
  83  * \param completion - completion callback
  84  * \param qqi    - is the qsd_qtype_info structure to pass to the completion
  85  *                 function
  86  * \param lqe    - is the qid entry to be processed
  87  *
  88  * \retval 0     - success
  89  * \retval -ve   - appropriate errors
  90  */
  91 int qsd_send_dqacq(const struct lu_env *env, struct obd_export *exp,
  92                    struct quota_body *qbody, bool sync,
  93                    qsd_req_completion_t completion, struct qsd_qtype_info *qqi,
  94                    struct lustre_handle *lockh, struct lquota_entry *lqe)
  95 {
  96         struct ptlrpc_request   *req;
  97         struct quota_body       *req_qbody;
  98         struct qsd_async_args   *aa;
  99         int                      rc;
 100         ENTRY;
 101
 102         LASSERT(exp);
 103
 104         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_QUOTA_DQACQ);
 105         if (req == NULL)
 106                 GOTO(out, rc = -ENOMEM);
 107
 108         req->rq_no_resend = req->rq_no_delay = 1;
 109         req->rq_no_retry_einprogress = 1;
 110         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, QUOTA_DQACQ);
 111         if (rc) {
 112                 ptlrpc_request_free(req);
 113                 GOTO(out, rc);
 114         }
 115
 116         req->rq_request_portal = MDS_READPAGE_PORTAL;
 117         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 118         *req_qbody = *qbody;
 119
 120         ptlrpc_request_set_replen(req);
 121
 122         aa = ptlrpc_req_async_args(aa, req);
 123         aa->aa_exp = exp;
 124         aa->aa_qqi = qqi;
 125         aa->aa_arg = (void *)lqe;
 126         aa->aa_completion = completion;
 127         lustre_handle_copy(&aa->aa_lockh, lockh);
 128
 129         if (sync) {
 130                 rc = ptlrpc_queue_wait(req);
 131                 rc = qsd_dqacq_interpret(env, req, aa, rc);
 132                 ptlrpc_req_finished(req);
 133         } else {
 134                 req->rq_interpret_reply = qsd_dqacq_interpret;
 135                 ptlrpcd_add_req(req);
 136         }
 137
 138         RETURN(rc);
 139 out:
 140         completion(env, qqi, qbody, NULL, lockh, NULL, lqe, rc);
 141         return rc;
 142 }
 143
 144 /*
 145  * intent quota request interpret callback.
 146  *
 147  * \param env    - the environment passed by the caller
 148  * \param req    - the intent quota request
 149  * \param arg    - qsd_async_args
 150  * \param rc     - request status
 151  *
 152  * \retval 0     - success
 153  * \retval -ve   - appropriate errors
 154  */
 155 static int qsd_intent_interpret(const struct lu_env *env,
 156                                 struct ptlrpc_request *req, void *arg, int rc)
 157 {
 158         struct lustre_handle     *lockh;
 159         struct quota_body        *rep_qbody = NULL, *req_qbody;
 160         struct qsd_async_args    *aa = (struct qsd_async_args *)arg;
 161         struct ldlm_reply        *lockrep;
 162         __u64                     flags = LDLM_FL_HAS_INTENT;
 163         ENTRY;
 164
 165         LASSERT(aa->aa_exp);
 166         lockh = &aa->aa_lockh;
 167         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 168         req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
 169
 170         rc = ldlm_cli_enqueue_fini(aa->aa_exp, req, LDLM_PLAIN, 0, LCK_CR,
 171                                    &flags, (void *)aa->aa_lvb,
 172                                    sizeof(struct lquota_lvb), lockh, rc);
 173         if (rc < 0) {
 174                 /* the lock has been destroyed, forget about the lock handle */
 175                 memset(lockh, 0, sizeof(*lockh));
 176                 /*
 177                  * To avoid the server being fullfilled by LDLM locks, server
 178                  * may reject the locking request by returning -EINPROGRESS,
 179                  * this is different from the -EINPROGRESS returned by quota
 180                  * code.
 181                  */
 182                 if (rc == -EINPROGRESS)
 183                         rc = -EAGAIN;
 184                 GOTO(out, rc);
 185         }
 186
 187         lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
 188         LASSERT(lockrep != NULL);
 189         rc = ptlrpc_status_ntoh(lockrep->lock_policy_res2);
 190
 191         if (rc == 0 || rc == -EDQUOT || rc == -EINPROGRESS)
 192                 rep_qbody = req_capsule_server_get(&req->rq_pill,
 193                                                    &RMF_QUOTA_BODY);
 194 out:
 195         aa->aa_completion(env, aa->aa_qqi, req_qbody, rep_qbody, lockh,
 196                           aa->aa_lvb, aa->aa_arg, rc);
 197         RETURN(rc);
 198 }
 199
 200 /*
 201  * Get intent per-ID lock or global-index lock from master.
 202  *
 203  * \param env    - the environment passed by the caller
 204  * \param exp    - is the export to use to send the intent RPC
 205  * \param qbody  - quota body to be packed in request
 206  * \param sync   - synchronous or asynchronous (pre-acquire)
 207  * \param it_op  - IT_QUOTA_DQACQ or IT_QUOTA_CONN
 208  * \param completion - completion callback
 209  * \param qqi    - is the qsd_qtype_info structure to pass to the completion
 210  *                 function
 211  * \param lvb    - is the lvb associated with the lock and returned by the
 212  *                 server
 213  * \param arg    - is an opaq argument passed to the completion callback
 214  *
 215  * \retval 0     - success
 216  * \retval -ve   - appropriate errors
 217  */
 218 int qsd_intent_lock(const struct lu_env *env, struct obd_export *exp,
 219                     struct quota_body *qbody, bool sync, int it_op,
 220                     qsd_req_completion_t completion, struct qsd_qtype_info *qqi,
 221                     struct lquota_lvb *lvb, void *arg)
 222 {
 223         struct qsd_thread_info  *qti = qsd_info(env);
 224         struct ptlrpc_request   *req;
 225         struct qsd_async_args   *aa = NULL;
 226         struct ldlm_intent      *lit;
 227         struct quota_body       *req_qbody;
 228         __u64                    flags = LDLM_FL_HAS_INTENT;
 229         int                      rc;
 230         ENTRY;
 231
 232         LASSERT(exp != NULL);
 233         LASSERT(!lustre_handle_is_used(&qbody->qb_lockh));
 234
 235         memset(&qti->qti_lockh, 0, sizeof(qti->qti_lockh));
 236
 237         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 238                                    &RQF_LDLM_INTENT_QUOTA);
 239         if (req == NULL)
 240                 GOTO(out, rc = -ENOMEM);
 241
 242         req->rq_no_retry_einprogress = 1;
 243         rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
 244         if (rc) {
 245                 ptlrpc_request_free(req);
 246                 GOTO(out, rc);
 247         }
 248         req->rq_request_portal = MDS_READPAGE_PORTAL;
 249
 250         lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
 251         lit->opc = (__u64)it_op;
 252
 253         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 254         *req_qbody = *qbody;
 255
 256         req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
 257                              sizeof(*lvb));
 258         ptlrpc_request_set_replen(req);
 259
 260         switch(it_op) {
 261         case IT_QUOTA_CONN:
 262                 /* build resource name associated with global index */
 263                 fid_build_reg_res_name(&qbody->qb_fid, &qti->qti_resid);
 264
 265                 /* copy einfo template and fill ei_cbdata with qqi pointer */
 266                 memcpy(&qti->qti_einfo, &qsd_glb_einfo, sizeof(qti->qti_einfo));
 267                 qti->qti_einfo.ei_cbdata = qqi;
 268
 269                 /* don't cancel global lock on memory pressure */
 270                 flags |= LDLM_FL_NO_LRU;
 271                 break;
 272         case IT_QUOTA_DQACQ:
 273                 /* build resource name associated for per-ID quota lock */
 274                 fid_build_quota_res_name(&qbody->qb_fid, &qbody->qb_id,
 275                                          &qti->qti_resid);
 276
 277                 /* copy einfo template and fill ei_cbdata with lqe pointer */
 278                 memcpy(&qti->qti_einfo, &qsd_id_einfo, sizeof(qti->qti_einfo));
 279                 qti->qti_einfo.ei_cbdata = arg;
 280                 break;
 281         default:
 282                 LASSERTF(0, "invalid it_op %d\n", it_op);
 283         }
 284
 285         /* build lock enqueue request */
 286         rc = ldlm_cli_enqueue(exp, &req, &qti->qti_einfo, &qti->qti_resid, NULL,
 287                               &flags, (void *)lvb, sizeof(*lvb), LVB_T_LQUOTA,
 288                               &qti->qti_lockh, 1);
 289         if (rc < 0) {
 290                 ptlrpc_req_finished(req);
 291                 GOTO(out, rc);
 292         }
 293
 294         /* grab reference on backend structure for the new lock */
 295         switch(it_op) {
 296         case IT_QUOTA_CONN:
 297                 /* grab reference on qqi for new lock */
 298 #ifdef USE_LU_REF
 299         {
 300                 struct ldlm_lock        *lock;
 301
 302                 lock = ldlm_handle2lock(&qti->qti_lockh);
 303                 if (lock == NULL) {
 304                         ptlrpc_req_finished(req);
 305                         GOTO(out, rc = -ENOLCK);
 306                 }
 307                 lu_ref_add(&qqi->qqi_reference, "glb_lock", lock);
 308                 LDLM_LOCK_PUT(lock);
 309         }
 310 #endif
 311                 qqi_getref(qqi);
 312                 break;
 313         case IT_QUOTA_DQACQ:
 314                 /* grab reference on lqe for new lock */
 315                 lqe_getref((struct lquota_entry *)arg);
 316                 /* all acquire/release request are sent with no_resend and
 317                  * no_delay flag */
 318                 req->rq_no_resend = req->rq_no_delay = 1;
 319                 break;
 320         default:
 321                 break;
 322         }
 323
 324         aa = ptlrpc_req_async_args(aa, req);
 325         aa->aa_exp = exp;
 326         aa->aa_qqi = qqi;
 327         aa->aa_arg = arg;
 328         aa->aa_lvb = lvb;
 329         aa->aa_completion = completion;
 330         lustre_handle_copy(&aa->aa_lockh, &qti->qti_lockh);
 331
 332         if (sync) {
 333                 /* send lock enqueue request and wait for completion */
 334                 rc = ptlrpc_queue_wait(req);
 335                 rc = qsd_intent_interpret(env, req, aa, rc);
 336                 ptlrpc_req_finished(req);
 337         } else {
 338                 /* queue lock request and return */
 339                 req->rq_interpret_reply = qsd_intent_interpret;
 340                 ptlrpcd_add_req(req);
 341         }
 342
 343         RETURN(rc);
 344 out:
 345         completion(env, qqi, qbody, NULL, &qti->qti_lockh, lvb, arg, rc);
 346         return rc;
 347 }
 348
 349 /*
 350  * Fetch a global or slave index from the QMT.
 351  *
 352  * \param env    - the environment passed by the caller
 353  * \param exp    - is the export to use to issue the OBD_IDX_READ RPC
 354  * \param ii     - is the index information to be packed in the request
 355  *                 on success, the index information returned by the server
 356  *                 is copied there.
 357  * \param npages - is the number of pages in the pages array
 358  * \param pages  - is an array of @npages pages
 359  *
 360  * \retval 0     - success
 361  * \retval -ve   - appropriate errors
 362  */
 363 int qsd_fetch_index(const struct lu_env *env, struct obd_export *exp,
 364                     struct idx_info *ii, unsigned int npages,
 365                     struct page **pages, bool *need_swab)
 366 {
 367         struct ptlrpc_request   *req;
 368         struct idx_info         *req_ii;
 369         struct ptlrpc_bulk_desc *desc;
 370         int                      rc, i;
 371         ENTRY;
 372
 373         LASSERT(exp);
 374
 375         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OBD_IDX_READ);
 376         if (req == NULL)
 377                 RETURN(-ENOMEM);
 378
 379         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, OBD_IDX_READ);
 380         if (rc) {
 381                 ptlrpc_request_free(req);
 382                 RETURN(rc);
 383         }
 384
 385         req->rq_request_portal = MDS_READPAGE_PORTAL;
 386         ptlrpc_at_set_req_timeout(req);
 387
 388         /* allocate bulk descriptor */
 389         desc = ptlrpc_prep_bulk_imp(req, npages, 1,
 390                                     PTLRPC_BULK_PUT_SINK | PTLRPC_BULK_BUF_KIOV,
 391                                     MDS_BULK_PORTAL,
 392                                     &ptlrpc_bulk_kiov_pin_ops);
 393         if (desc == NULL)
 394                 GOTO(out, rc = -ENOMEM);
 395
 396         /* req now owns desc and will free it when it gets freed */
 397         for (i = 0; i < npages; i++)
 398                 desc->bd_frag_ops->add_kiov_frag(desc, pages[i], 0,
 399                                                  PAGE_SIZE);
 400
 401         /* pack index information in request */
 402         req_ii = req_capsule_client_get(&req->rq_pill, &RMF_IDX_INFO);
 403         *req_ii = *ii;
 404
 405         ptlrpc_request_set_replen(req);
 406
 407         /* send request to master and wait for RPC to complete */
 408         rc = ptlrpc_queue_wait(req);
 409         if (rc)
 410                 GOTO(out, rc);
 411
 412         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
 413                                           req->rq_bulk->bd_nob_transferred);
 414         if (rc < 0)
 415                 GOTO(out, rc);
 416         else
 417                 /* sptlrpc_cli_unwrap_bulk_read() returns the number of bytes
 418                  * transferred*/
 419                 rc = 0;
 420
 421         req_ii = req_capsule_server_get(&req->rq_pill, &RMF_IDX_INFO);
 422         *ii = *req_ii;
 423
 424         *need_swab = ptlrpc_rep_need_swab(req);
 425
 426         EXIT;
 427 out:
 428         ptlrpc_req_finished(req);
 429         return rc;
 430 }