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, 2013, 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_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 117         *req_qbody = *qbody;
 118
 119         ptlrpc_request_set_replen(req);
 120
 121         CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
 122         aa = ptlrpc_req_async_args(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, PDL_POLICY_LOCAL, -1);
 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 ldlm_intent       *lit;
 161         struct qsd_async_args    *aa = (struct qsd_async_args *)arg;
 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         lit = 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         if (rc == 0 || rc == -EDQUOT || rc == -EINPROGRESS)
 178                 rep_qbody = req_capsule_server_get(&req->rq_pill,
 179                                                    &RMF_QUOTA_BODY);
 180
 181         aa->aa_completion(env, aa->aa_qqi, req_qbody, rep_qbody, lockh,
 182                           aa->aa_lvb, aa->aa_arg, rc);
 183         RETURN(rc);
 184 }
 185
 186 /*
 187  * Get intent per-ID lock or global-index lock from master.
 188  *
 189  * \param env    - the environment passed by the caller
 190  * \param exp    - is the export to use to send the intent RPC
 191  * \param qbody  - quota body to be packed in request
 192  * \param sync   - synchronous or asynchronous (pre-acquire)
 193  * \param it_op  - IT_QUOTA_DQACQ or IT_QUOTA_CONN
 194  * \param completion - completion callback
 195  * \param qqi    - is the qsd_qtype_info structure to pass to the completion
 196  *                 function
 197  * \param lvb    - is the lvb associated with the lock and returned by the
 198  *                 server
 199  * \param arg    - is an opaq argument passed to the completion callback
 200  *
 201  * \retval 0     - success
 202  * \retval -ve   - appropriate errors
 203  */
 204 int qsd_intent_lock(const struct lu_env *env, struct obd_export *exp,
 205                     struct quota_body *qbody, bool sync, int it_op,
 206                     qsd_req_completion_t completion, struct qsd_qtype_info *qqi,
 207                     struct lquota_lvb *lvb, void *arg)
 208 {
 209         struct qsd_thread_info  *qti = qsd_info(env);
 210         struct ptlrpc_request   *req;
 211         struct qsd_async_args   *aa = NULL;
 212         struct ldlm_intent      *lit;
 213         struct quota_body       *req_qbody;
 214         __u64                    flags = LDLM_FL_HAS_INTENT;
 215         int                      rc;
 216         ENTRY;
 217
 218         LASSERT(exp != NULL);
 219         LASSERT(!lustre_handle_is_used(&qbody->qb_lockh));
 220
 221         memset(&qti->qti_lockh, 0, sizeof(qti->qti_lockh));
 222
 223         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 224                                    &RQF_LDLM_INTENT_QUOTA);
 225         if (req == NULL)
 226                 GOTO(out, rc = -ENOMEM);
 227
 228         req->rq_no_retry_einprogress = 1;
 229         rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
 230         if (rc) {
 231                 ptlrpc_request_free(req);
 232                 GOTO(out, rc);
 233         }
 234
 235         lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
 236         lit->opc = (__u64)it_op;
 237
 238         req_qbody = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_BODY);
 239         *req_qbody = *qbody;
 240
 241         req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
 242                              sizeof(*lvb));
 243         ptlrpc_request_set_replen(req);
 244
 245         switch(it_op) {
 246         case IT_QUOTA_CONN:
 247                 /* build resource name associated with global index */
 248                 fid_build_reg_res_name(&qbody->qb_fid, &qti->qti_resid);
 249
 250                 /* copy einfo template and fill ei_cbdata with qqi pointer */
 251                 memcpy(&qti->qti_einfo, &qsd_glb_einfo, sizeof(qti->qti_einfo));
 252                 qti->qti_einfo.ei_cbdata = qqi;
 253
 254                 /* don't cancel global lock on memory pressure */
 255                 flags |= LDLM_FL_NO_LRU;
 256                 break;
 257         case IT_QUOTA_DQACQ:
 258                 /* build resource name associated for per-ID quota lock */
 259                 fid_build_quota_res_name(&qbody->qb_fid, &qbody->qb_id,
 260                                          &qti->qti_resid);
 261
 262                 /* copy einfo template and fill ei_cbdata with lqe pointer */
 263                 memcpy(&qti->qti_einfo, &qsd_id_einfo, sizeof(qti->qti_einfo));
 264                 qti->qti_einfo.ei_cbdata = arg;
 265                 break;
 266         default:
 267                 LASSERTF(0, "invalid it_op %d\n", it_op);
 268         }
 269
 270         /* build lock enqueue request */
 271         rc = ldlm_cli_enqueue(exp, &req, &qti->qti_einfo, &qti->qti_resid, NULL,
 272                               &flags, (void *)lvb, sizeof(*lvb), LVB_T_LQUOTA,
 273                               &qti->qti_lockh, 1);
 274         if (rc < 0) {
 275                 ptlrpc_req_finished(req);
 276                 GOTO(out, rc);
 277         }
 278
 279         /* grab reference on backend structure for the new lock */
 280         switch(it_op) {
 281         case IT_QUOTA_CONN:
 282                 /* grab reference on qqi for new lock */
 283 #ifdef USE_LU_REF
 284         {
 285                 struct ldlm_lock        *lock;
 286
 287                 lock = ldlm_handle2lock(&qti->qti_lockh);
 288                 if (lock == NULL) {
 289                         ptlrpc_req_finished(req);
 290                         GOTO(out, rc = -ENOLCK);
 291                 }
 292                 lu_ref_add(&qqi->qqi_reference, "glb_lock", lock);
 293                 LDLM_LOCK_PUT(lock);
 294         }
 295 #endif
 296                 qqi_getref(qqi);
 297                 break;
 298         case IT_QUOTA_DQACQ:
 299                 /* grab reference on lqe for new lock */
 300                 lqe_getref((struct lquota_entry *)arg);
 301                 /* all acquire/release request are sent with no_resend and
 302                  * no_delay flag */
 303                 req->rq_no_resend = req->rq_no_delay = 1;
 304                 break;
 305         default:
 306                 break;
 307         }
 308
 309         CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
 310         aa = ptlrpc_req_async_args(req);
 311         aa->aa_exp = exp;
 312         aa->aa_qqi = qqi;
 313         aa->aa_arg = arg;
 314         aa->aa_lvb = lvb;
 315         aa->aa_completion = completion;
 316         lustre_handle_copy(&aa->aa_lockh, &qti->qti_lockh);
 317
 318         if (sync) {
 319                 /* send lock enqueue request and wait for completion */
 320                 rc = ptlrpc_queue_wait(req);
 321                 rc = qsd_intent_interpret(env, req, aa, rc);
 322                 ptlrpc_req_finished(req);
 323         } else {
 324                 /* queue lock request and return */
 325                 req->rq_interpret_reply = qsd_intent_interpret;
 326                 ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
 327         }
 328
 329         RETURN(rc);
 330 out:
 331         completion(env, qqi, qbody, NULL, &qti->qti_lockh, lvb, arg, rc);
 332         return rc;
 333 }
 334
 335 /*
 336  * Fetch a global or slave index from the QMT.
 337  *
 338  * \param env    - the environment passed by the caller
 339  * \param exp    - is the export to use to issue the OBD_IDX_READ RPC
 340  * \param ii     - is the index information to be packed in the request
 341  *                 on success, the index information returned by the server
 342  *                 is copied there.
 343  * \param npages - is the number of pages in the pages array
 344  * \param pages  - is an array of @npages pages
 345  *
 346  * \retval 0     - success
 347  * \retval -ve   - appropriate errors
 348  */
 349 int qsd_fetch_index(const struct lu_env *env, struct obd_export *exp,
 350                     struct idx_info *ii, unsigned int npages,
 351                     struct page **pages, bool *need_swab)
 352 {
 353         struct ptlrpc_request   *req;
 354         struct idx_info         *req_ii;
 355         struct ptlrpc_bulk_desc *desc;
 356         int                      rc, i;
 357         ENTRY;
 358
 359         LASSERT(exp);
 360
 361         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OBD_IDX_READ);
 362         if (req == NULL)
 363                 RETURN(-ENOMEM);
 364
 365         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, OBD_IDX_READ);
 366         if (rc) {
 367                 ptlrpc_request_free(req);
 368                 RETURN(rc);
 369         }
 370
 371         req->rq_request_portal = MDS_READPAGE_PORTAL;
 372         ptlrpc_at_set_req_timeout(req);
 373
 374         /* allocate bulk descriptor */
 375         desc = ptlrpc_prep_bulk_imp(req, npages, 1,
 376                                     PTLRPC_BULK_PUT_SINK | PTLRPC_BULK_BUF_KIOV,
 377                                     MDS_BULK_PORTAL,
 378                                     &ptlrpc_bulk_kiov_pin_ops);
 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                 desc->bd_frag_ops->add_kiov_frag(desc, pages[i], 0,
 387                                                  PAGE_CACHE_SIZE);
 388
 389         /* pack index information in request */
 390         req_ii = req_capsule_client_get(&req->rq_pill, &RMF_IDX_INFO);
 391         *req_ii = *ii;
 392
 393         ptlrpc_request_set_replen(req);
 394
 395         /* send request to master and wait for RPC to complete */
 396         rc = ptlrpc_queue_wait(req);
 397         if (rc)
 398                 GOTO(out, rc);
 399
 400         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
 401                                           req->rq_bulk->bd_nob_transferred);
 402         if (rc < 0)
 403                 GOTO(out, rc);
 404         else
 405                 /* sptlrpc_cli_unwrap_bulk_read() returns the number of bytes
 406                  * transferred*/
 407                 rc = 0;
 408
 409         req_ii = req_capsule_server_get(&req->rq_pill, &RMF_IDX_INFO);
 410         *ii = *req_ii;
 411
 412         *need_swab = ptlrpc_rep_need_swab(req);
 413
 414         EXIT;
 415 out:
 416         ptlrpc_req_finished(req);
 417         return rc;
 418 }