lustre/osp/osp_precreate.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, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osp/osp_sync.c
  37  *
  38  * Lustre OST Proxy Device
  39  *
  40  * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
  41  * Author: Mikhail Pershin <mike.pershin@intel.com>
  42  * Author: Di Wang <di.wang@intel.com>
  43  */
  44
  45 #ifndef EXPORT_SYMTAB
  46 # define EXPORT_SYMTAB
  47 #endif
  48 #define DEBUG_SUBSYSTEM S_MDS
  49
  50 #include "osp_internal.h"
  51
  52 /*
  53  * there are two specific states to take care about:
  54  *
  55  * = import is disconnected =
  56  *
  57  * = import is inactive =
  58  *   in this case osp_declare_object_create() returns an error
  59  *
  60  */
  61
  62 /*
  63  * statfs
  64  */
  65 static inline int osp_statfs_need_update(struct osp_device *d)
  66 {
  67         return !cfs_time_before(cfs_time_current(),
  68                                 d->opd_statfs_fresh_till);
  69 }
  70
  71 static void osp_statfs_timer_cb(unsigned long _d)
  72 {
  73         struct osp_device *d = (struct osp_device *) _d;
  74
  75         LASSERT(d);
  76         cfs_waitq_signal(&d->opd_pre_waitq);
  77 }
  78
  79 static int osp_statfs_interpret(const struct lu_env *env,
  80                                 struct ptlrpc_request *req,
  81                                 union ptlrpc_async_args *aa, int rc)
  82 {
  83         struct obd_import       *imp = req->rq_import;
  84         struct obd_statfs       *msfs;
  85         struct osp_device       *d;
  86
  87         ENTRY;
  88
  89         aa = ptlrpc_req_async_args(req);
  90         d = aa->pointer_arg[0];
  91         LASSERT(d);
  92
  93         if (rc != 0)
  94                 GOTO(out, rc);
  95
  96         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
  97         if (msfs == NULL)
  98                 GOTO(out, rc = -EPROTO);
  99
 100         d->opd_statfs = *msfs;
 101
 102         osp_pre_update_status(d, rc);
 103
 104         /* schedule next update */
 105         d->opd_statfs_fresh_till = cfs_time_shift(d->opd_statfs_maxage);
 106         cfs_timer_arm(&d->opd_statfs_timer, d->opd_statfs_fresh_till);
 107         d->opd_statfs_update_in_progress = 0;
 108
 109         CDEBUG(D_CACHE, "updated statfs %p\n", d);
 110
 111         RETURN(0);
 112 out:
 113         /* couldn't update statfs, try again as soon as possible */
 114         cfs_waitq_signal(&d->opd_pre_waitq);
 115         if (req->rq_import_generation == imp->imp_generation)
 116                 CDEBUG(D_CACHE, "%s: couldn't update statfs: rc = %d\n",
 117                        d->opd_obd->obd_name, rc);
 118         RETURN(rc);
 119 }
 120
 121 static int osp_statfs_update(struct osp_device *d)
 122 {
 123         struct ptlrpc_request   *req;
 124         struct obd_import       *imp;
 125         union ptlrpc_async_args *aa;
 126         int                      rc;
 127
 128         ENTRY;
 129
 130         CDEBUG(D_CACHE, "going to update statfs\n");
 131
 132         imp = d->opd_obd->u.cli.cl_import;
 133         LASSERT(imp);
 134
 135         req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 136         if (req == NULL)
 137                 RETURN(-ENOMEM);
 138
 139         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
 140         if (rc) {
 141                 ptlrpc_request_free(req);
 142                 RETURN(rc);
 143         }
 144         ptlrpc_request_set_replen(req);
 145         req->rq_request_portal = OST_CREATE_PORTAL;
 146         ptlrpc_at_set_req_timeout(req);
 147
 148         req->rq_interpret_reply = (ptlrpc_interpterer_t)osp_statfs_interpret;
 149         aa = ptlrpc_req_async_args(req);
 150         aa->pointer_arg[0] = d;
 151
 152         /*
 153          * no updates till reply
 154          */
 155         cfs_timer_disarm(&d->opd_statfs_timer);
 156         d->opd_statfs_fresh_till = cfs_time_shift(obd_timeout * 1000);
 157         d->opd_statfs_update_in_progress = 1;
 158
 159         ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
 160
 161         RETURN(0);
 162 }
 163
 164 /*
 165  * XXX: there might be a case where removed object(s) do not add free
 166  * space (empty object). if the number of such deletions is high, then
 167  * we can start to update statfs too often - a rpc storm
 168  * TODO: some throttling is needed
 169  */
 170 void osp_statfs_need_now(struct osp_device *d)
 171 {
 172         if (!d->opd_statfs_update_in_progress) {
 173                 /*
 174                  * if current status is -ENOSPC (lack of free space on OST)
 175                  * then we should poll OST immediately once object destroy
 176                  * is replied
 177                  */
 178                 d->opd_statfs_fresh_till = cfs_time_shift(-1);
 179                 cfs_timer_disarm(&d->opd_statfs_timer);
 180                 cfs_waitq_signal(&d->opd_pre_waitq);
 181         }
 182 }
 183
 184
 185 /*
 186  * OSP tries to maintain pool of available objects so that calls to create
 187  * objects don't block most of time
 188  *
 189  * each time OSP gets connected to OST, we should start from precreation cleanup
 190  */
 191 static inline int osp_precreate_running(struct osp_device *d)
 192 {
 193         return !!(d->opd_pre_thread.t_flags & SVC_RUNNING);
 194 }
 195
 196 static inline int osp_precreate_stopped(struct osp_device *d)
 197 {
 198         return !!(d->opd_pre_thread.t_flags & SVC_STOPPED);
 199 }
 200
 201 static inline int osp_objs_precreated(const struct lu_env *env,
 202                                       struct osp_device *osp)
 203 {
 204         struct lu_fid *fid1 = &osp->opd_pre_last_created_fid;
 205         struct lu_fid *fid2 = &osp->opd_pre_used_fid;
 206
 207         LASSERTF(fid_seq(fid1) == fid_seq(fid2),
 208                  "Created fid"DFID" Next fid "DFID"\n", PFID(fid1), PFID(fid2));
 209
 210         if (fid_is_idif(fid1)) {
 211                 struct ost_id *oi1 = &osp_env_info(env)->osi_oi;
 212                 struct ost_id *oi2 = &osp_env_info(env)->osi_oi2;
 213
 214                 LASSERT(fid_is_idif(fid1) && fid_is_idif(fid2));
 215                 ostid_idif_pack(fid1, oi1);
 216                 ostid_idif_pack(fid2, oi2);
 217                 LASSERT(oi1->oi_id >= oi2->oi_id);
 218
 219                 return oi1->oi_id - oi2->oi_id;
 220         }
 221
 222         return fid_oid(fid1) - fid_oid(fid2);
 223 }
 224
 225 static inline int osp_precreate_near_empty_nolock(const struct lu_env *env,
 226                                                   struct osp_device *d)
 227 {
 228         int window = osp_objs_precreated(env, d);
 229
 230         /* don't consider new precreation till OST is healty and
 231          * has free space */
 232         return ((window - d->opd_pre_reserved < d->opd_pre_grow_count / 2) &&
 233                 (d->opd_pre_status == 0));
 234 }
 235
 236 static inline int osp_precreate_near_empty(const struct lu_env *env,
 237                                            struct osp_device *d)
 238 {
 239         int rc;
 240
 241         /* XXX: do we really need locking here? */
 242         spin_lock(&d->opd_pre_lock);
 243         rc = osp_precreate_near_empty_nolock(env, d);
 244         spin_unlock(&d->opd_pre_lock);
 245         return rc;
 246 }
 247
 248 static inline int osp_create_end_seq(const struct lu_env *env,
 249                                      struct osp_device *osp)
 250 {
 251         struct lu_fid *fid = &osp->opd_pre_used_fid;
 252         int rc;
 253
 254         spin_lock(&osp->opd_pre_lock);
 255         rc = osp_fid_end_seq(env, fid);
 256         spin_unlock(&osp->opd_pre_lock);
 257         return rc;
 258 }
 259
 260 /**
 261  * Write fid into last_oid/last_seq file.
 262  **/
 263 int osp_write_last_oid_seq_files(struct lu_env *env, struct osp_device *osp,
 264                                  struct lu_fid *fid, int sync)
 265 {
 266         struct osp_thread_info  *oti = osp_env_info(env);
 267         struct lu_buf      *lb_oid = &oti->osi_lb;
 268         struct lu_buf      *lb_oseq = &oti->osi_lb2;
 269         loff_t             oid_off;
 270         loff_t             oseq_off;
 271         struct thandle    *th;
 272         int                   rc;
 273         ENTRY;
 274
 275         /* Note: through f_oid is only 32bits, it will also write
 276          * 64 bits for oid to keep compatiblity with the previous
 277          * version. */
 278         lb_oid->lb_buf = &fid->f_oid;
 279         lb_oid->lb_len = sizeof(obd_id);
 280         oid_off = sizeof(obd_id) * osp->opd_index;
 281
 282         lb_oseq->lb_buf = &fid->f_seq;
 283         lb_oseq->lb_len = sizeof(obd_id);
 284         oseq_off = sizeof(obd_id) * osp->opd_index;
 285
 286         th = dt_trans_create(env, osp->opd_storage);
 287         if (IS_ERR(th))
 288                 RETURN(PTR_ERR(th));
 289
 290         th->th_sync |= sync;
 291         rc = dt_declare_record_write(env, osp->opd_last_used_oid_file,
 292                                      lb_oid->lb_len, oid_off, th);
 293         if (rc != 0)
 294                 GOTO(out, rc);
 295
 296         rc = dt_declare_record_write(env, osp->opd_last_used_seq_file,
 297                                      lb_oseq->lb_len, oseq_off, th);
 298         if (rc != 0)
 299                 GOTO(out, rc);
 300
 301         rc = dt_trans_start_local(env, osp->opd_storage, th);
 302         if (rc != 0)
 303                 GOTO(out, rc);
 304
 305         rc = dt_record_write(env, osp->opd_last_used_oid_file, lb_oid,
 306                              &oid_off, th);
 307         if (rc != 0) {
 308                 CERROR("%s: can not write to last seq file: rc = %d\n",
 309                         osp->opd_obd->obd_name, rc);
 310                 GOTO(out, rc);
 311         }
 312         rc = dt_record_write(env, osp->opd_last_used_seq_file, lb_oseq,
 313                              &oseq_off, th);
 314         if (rc) {
 315                 CERROR("%s: can not write to last seq file: rc = %d\n",
 316                         osp->opd_obd->obd_name, rc);
 317                 GOTO(out, rc);
 318         }
 319 out:
 320         dt_trans_stop(env, osp->opd_storage, th);
 321         RETURN(rc);
 322 }
 323
 324 int osp_precreate_rollover_new_seq(struct lu_env *env, struct osp_device *osp)
 325 {
 326         struct lu_fid   *fid = &osp_env_info(env)->osi_fid;
 327         struct lu_fid   *last_fid = &osp->opd_last_used_fid;
 328         int             rc;
 329         ENTRY;
 330
 331         rc = seq_client_get_seq(env, osp->opd_obd->u.cli.cl_seq, &fid->f_seq);
 332         if (rc != 0) {
 333                 CERROR("%s: alloc fid error: rc = %d\n",
 334                        osp->opd_obd->obd_name, rc);
 335                 RETURN(rc);
 336         }
 337
 338         fid->f_oid = 1;
 339         fid->f_ver = 0;
 340         LASSERTF(fid_seq(fid) != fid_seq(last_fid),
 341                  "fid "DFID", last_fid "DFID"\n", PFID(fid),
 342                  PFID(last_fid));
 343
 344         rc = osp_write_last_oid_seq_files(env, osp, fid, 1);
 345         if (rc != 0) {
 346                 CERROR("%s: Can not update oid/seq file: rc = %d\n",
 347                        osp->opd_obd->obd_name, rc);
 348                 RETURN(rc);
 349         }
 350
 351         LCONSOLE_INFO("%s: update sequence from "LPX64" to "LPX64"\n",
 352                       osp->opd_obd->obd_name, fid_seq(last_fid),
 353                       fid_seq(fid));
 354         /* Update last_xxx to the new seq */
 355         spin_lock(&osp->opd_pre_lock);
 356         osp->opd_last_used_fid = *fid;
 357         osp->opd_gap_start_fid = *fid;
 358         osp->opd_pre_used_fid = *fid;
 359         osp->opd_pre_last_created_fid = *fid;
 360         spin_unlock(&osp->opd_pre_lock);
 361
 362         RETURN(rc);
 363 }
 364
 365 /**
 366  * alloc fids for precreation.
 367  * rc = 0 Success, @grow is the count of real allocation.
 368  * rc = 1 Current seq is used up.
 369  * rc < 0 Other error.
 370  **/
 371 static int osp_precreate_fids(const struct lu_env *env, struct osp_device *osp,
 372                               struct lu_fid *fid, int *grow)
 373 {
 374         struct osp_thread_info  *osi = osp_env_info(env);
 375         __u64                   end;
 376         int                     i = 0;
 377
 378         if (fid_is_idif(fid)) {
 379                 struct lu_fid   *last_fid;
 380                 struct ost_id   *oi = &osi->osi_oi;
 381
 382                 spin_lock(&osp->opd_pre_lock);
 383                 last_fid = &osp->opd_pre_last_created_fid;
 384                 ostid_idif_pack(last_fid, oi);
 385                 end = min(oi->oi_id + *grow, IDIF_MAX_OID);
 386                 *grow = end - oi->oi_id;
 387                 oi->oi_id += *grow;
 388                 spin_unlock(&osp->opd_pre_lock);
 389
 390                 if (*grow == 0)
 391                         return 1;
 392
 393                 ostid_idif_unpack(oi, fid, osp->opd_index);
 394                 return 0;
 395         }
 396
 397         spin_lock(&osp->opd_pre_lock);
 398         *fid = osp->opd_pre_last_created_fid;
 399         end = fid->f_oid;
 400         end = min((end + *grow), (__u64)LUSTRE_DATA_SEQ_MAX_WIDTH);
 401         *grow = end - fid->f_oid;
 402         fid->f_oid += end - fid->f_oid;
 403         spin_unlock(&osp->opd_pre_lock);
 404
 405         CDEBUG(D_INFO, "Expect %d, actual %d ["DFID" -- "DFID"]\n",
 406                *grow, i, PFID(fid), PFID(&osp->opd_pre_last_created_fid));
 407
 408         return *grow > 0 ? 0 : 1;
 409 }
 410
 411 static int osp_precreate_send(const struct lu_env *env, struct osp_device *d)
 412 {
 413         struct osp_thread_info  *oti = osp_env_info(env);
 414         struct ptlrpc_request   *req;
 415         struct obd_import       *imp;
 416         struct ost_body         *body;
 417         int                      rc, grow, diff;
 418         struct lu_fid           *fid = &oti->osi_fid;
 419         ENTRY;
 420
 421         /* don't precreate new objects till OST healthy and has free space */
 422         if (unlikely(d->opd_pre_status)) {
 423                 CDEBUG(D_INFO, "%s: don't send new precreate: rc = %d\n",
 424                        d->opd_obd->obd_name, d->opd_pre_status);
 425                 RETURN(0);
 426         }
 427
 428         /*
 429          * if not connection/initialization is compeleted, ignore
 430          */
 431         imp = d->opd_obd->u.cli.cl_import;
 432         LASSERT(imp);
 433
 434         req = ptlrpc_request_alloc(imp, &RQF_OST_CREATE);
 435         if (req == NULL)
 436                 RETURN(-ENOMEM);
 437         req->rq_request_portal = OST_CREATE_PORTAL;
 438         /* we should not resend create request - anyway we will have delorphan
 439          * and kill these objects */
 440         req->rq_no_delay = req->rq_no_resend = 1;
 441
 442         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
 443         if (rc) {
 444                 ptlrpc_request_free(req);
 445                 RETURN(rc);
 446         }
 447
 448         spin_lock(&d->opd_pre_lock);
 449         if (d->opd_pre_grow_count > d->opd_pre_max_grow_count / 2)
 450                 d->opd_pre_grow_count = d->opd_pre_max_grow_count / 2;
 451         grow = d->opd_pre_grow_count;
 452         spin_unlock(&d->opd_pre_lock);
 453
 454         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 455         LASSERT(body);
 456
 457         *fid = d->opd_pre_last_created_fid;
 458         rc = osp_precreate_fids(env, d, fid, &grow);
 459         if (rc == 1) {
 460                 /* Current seq has been used up*/
 461                 if (!osp_is_fid_client(d)) {
 462                         osp_pre_update_status(d, -ENOSPC);
 463                         rc = -ENOSPC;
 464                 }
 465                 cfs_waitq_signal(&d->opd_pre_waitq);
 466                 GOTO(out_req, rc);
 467         }
 468
 469         if (!osp_is_fid_client(d)) {
 470                 /* Non-FID client will always send seq 0 because of
 471                  * compatiblity */
 472                 LASSERTF(fid_is_idif(fid), "Invalid fid "DFID"\n", PFID(fid));
 473                 fid->f_seq = 0;
 474         }
 475
 476         fid_ostid_pack(fid, &body->oa.o_oi);
 477         body->oa.o_valid = OBD_MD_FLGROUP;
 478
 479         ptlrpc_request_set_replen(req);
 480
 481         rc = ptlrpc_queue_wait(req);
 482         if (rc) {
 483                 CERROR("%s: can't precreate: rc = %d\n", d->opd_obd->obd_name,
 484                        rc);
 485                 GOTO(out_req, rc);
 486         }
 487         LASSERT(req->rq_transno == 0);
 488
 489         body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 490         if (body == NULL)
 491                 GOTO(out_req, rc = -EPROTO);
 492
 493         fid_ostid_unpack(fid, &body->oa.o_oi, d->opd_index);
 494         LASSERTF(lu_fid_diff(fid, &d->opd_pre_used_fid) > 0,
 495                  "reply fid "DFID" pre used fid "DFID"\n", PFID(fid),
 496                  PFID(&d->opd_pre_used_fid));
 497
 498         CDEBUG(D_HA, "%s: new last_created "DFID"\n", d->opd_obd->obd_name,
 499                PFID(fid));
 500
 501         diff = lu_fid_diff(fid, &d->opd_pre_last_created_fid);
 502
 503         spin_lock(&d->opd_pre_lock);
 504         if (diff < grow) {
 505                 /* the OST has not managed to create all the
 506                  * objects we asked for */
 507                 d->opd_pre_grow_count = max(diff, OST_MIN_PRECREATE);
 508                 d->opd_pre_grow_slow = 1;
 509         } else {
 510                 /* the OST is able to keep up with the work,
 511                  * we could consider increasing grow_count
 512                  * next time if needed */
 513                 d->opd_pre_grow_slow = 0;
 514         }
 515
 516         d->opd_pre_last_created_fid = *fid;
 517         spin_unlock(&d->opd_pre_lock);
 518
 519         CDEBUG(D_OTHER, "current precreated pool: "DFID"-"DFID"\n",
 520                PFID(&d->opd_pre_used_fid), PFID(&d->opd_pre_last_created_fid));
 521 out_req:
 522         /* now we can wakeup all users awaiting for objects */
 523         osp_pre_update_status(d, rc);
 524         cfs_waitq_signal(&d->opd_pre_user_waitq);
 525
 526         ptlrpc_req_finished(req);
 527         RETURN(rc);
 528 }
 529
 530 static int osp_get_lastfid_from_ost(const struct lu_env *env,
 531                                     struct osp_device *d)
 532 {
 533         struct ost_id           *oi = &osp_env_info(env)->osi_oi;
 534         struct ptlrpc_request   *req = NULL;
 535         struct obd_import       *imp;
 536         struct lu_fid           *last_fid = &d->opd_last_used_fid;
 537         char                    *tmp;
 538         int                     rc;
 539         ENTRY;
 540
 541         imp = d->opd_obd->u.cli.cl_import;
 542         LASSERT(imp);
 543
 544         req = ptlrpc_request_alloc(imp, &RQF_OST_GET_INFO_LAST_FID);
 545         if (req == NULL)
 546                 RETURN(-ENOMEM);
 547
 548         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY, RCL_CLIENT,
 549                              sizeof(KEY_LAST_FID));
 550
 551         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL, RCL_CLIENT,
 552                              sizeof(*oi));
 553
 554         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
 555         if (rc) {
 556                 ptlrpc_request_free(req);
 557                 RETURN(rc);
 558         }
 559
 560         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
 561         memcpy(tmp, KEY_LAST_FID, sizeof(KEY_LAST_FID));
 562
 563         req->rq_no_delay = req->rq_no_resend = 1;
 564         fid_ostid_pack(last_fid, oi);
 565         ostid_cpu_to_le(oi, oi);
 566         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
 567         memcpy(tmp, oi, sizeof(*oi));
 568         ptlrpc_request_set_replen(req);
 569
 570         rc = ptlrpc_queue_wait(req);
 571         if (rc) {
 572                 /* bad-bad OST.. let sysadm sort this out */
 573                 if (rc == -ENOTSUPP) {
 574                         CERROR("%s: server does not support FID: rc = %d\n",
 575                                d->opd_obd->obd_name, -ENOTSUPP);
 576                 }
 577                 ptlrpc_set_import_active(imp, 0);
 578                 GOTO(out, rc);
 579         }
 580
 581         oi = req_capsule_server_get(&req->rq_pill, &RMF_OST_ID);
 582         if (oi == NULL) {
 583                 CERROR("%s: Got last_fid failed.\n", d->opd_obd->obd_name);
 584                 GOTO(out, rc = -EPROTO);
 585         }
 586
 587         rc = fid_ostid_unpack(last_fid, oi, d->opd_index);
 588         if (rc != 0 || !fid_is_sane(last_fid)) {
 589                 CERROR("%s: Got insane last_fid "DFID"\n",
 590                        d->opd_obd->obd_name, PFID(last_fid));
 591                 GOTO(out, rc = -EPROTO);
 592         }
 593
 594         /* Only update the last used fid, if the OST has objects for
 595          * this sequence, i.e. fid_oid > 0 */
 596         if (fid_oid(last_fid) > 0)
 597                 d->opd_last_used_fid = *last_fid;
 598
 599         CDEBUG(D_HA, "%s: Got last_fid "DFID"\n", d->opd_obd->obd_name,
 600                PFID(last_fid));
 601
 602 out:
 603         ptlrpc_req_finished(req);
 604         RETURN(rc);
 605 }
 606
 607 /**
 608  * asks OST to clean precreate orphans
 609  * and gets next id for new objects
 610  */
 611 static int osp_precreate_cleanup_orphans(struct lu_env *env,
 612                                          struct osp_device *d)
 613 {
 614         struct osp_thread_info  *osi = osp_env_info(env);
 615         struct lu_fid           *last_fid = &osi->osi_fid;
 616         struct ptlrpc_request   *req = NULL;
 617         struct obd_import       *imp;
 618         struct ost_body         *body;
 619         struct l_wait_info       lwi = { 0 };
 620         int                      update_status = 0;
 621         int                      rc;
 622         int                      diff;
 623
 624         ENTRY;
 625
 626         /*
 627          * wait for local recovery to finish, so we can cleanup orphans
 628          * orphans are all objects since "last used" (assigned), but
 629          * there might be objects reserved and in some cases they won't
 630          * be used. we can't cleanup them till we're sure they won't be
 631          * used. also can't we allow new reservations because they may
 632          * end up getting orphans being cleaned up below. so we block
 633          * new reservations and wait till all reserved objects either
 634          * user or released.
 635          */
 636         spin_lock(&d->opd_pre_lock);
 637         d->opd_pre_recovering = 1;
 638         spin_unlock(&d->opd_pre_lock);
 639         /*
 640          * The locking above makes sure the opd_pre_reserved check below will
 641          * catch all osp_precreate_reserve() calls who find
 642          * "!opd_pre_recovering".
 643          */
 644         l_wait_event(d->opd_pre_waitq,
 645                      (!d->opd_pre_reserved && d->opd_recovery_completed) ||
 646                      !osp_precreate_running(d) || d->opd_got_disconnected,
 647                      &lwi);
 648         if (!osp_precreate_running(d) || d->opd_got_disconnected)
 649                 GOTO(out, rc = -EAGAIN);
 650
 651         CDEBUG(D_HA, "%s: going to cleanup orphans since "DFID"\n",
 652                d->opd_obd->obd_name, PFID(&d->opd_last_used_fid));
 653
 654         *last_fid = d->opd_last_used_fid;
 655         /* The OSP should already get the valid seq now */
 656         LASSERT(!fid_is_zero(last_fid));
 657         if (fid_oid(&d->opd_last_used_fid) < 2) {
 658                 /* lastfid looks strange... ask OST */
 659                 rc = osp_get_lastfid_from_ost(env, d);
 660                 if (rc)
 661                         GOTO(out, rc);
 662         }
 663
 664         imp = d->opd_obd->u.cli.cl_import;
 665         LASSERT(imp);
 666
 667         req = ptlrpc_request_alloc(imp, &RQF_OST_CREATE);
 668         if (req == NULL)
 669                 GOTO(out, rc = -ENOMEM);
 670
 671         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
 672         if (rc) {
 673                 ptlrpc_request_free(req);
 674                 req = NULL;
 675                 GOTO(out, rc);
 676         }
 677
 678         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 679         if (body == NULL)
 680                 GOTO(out, rc = -EPROTO);
 681
 682         body->oa.o_flags = OBD_FL_DELORPHAN;
 683         body->oa.o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
 684
 685         fid_ostid_pack(&d->opd_last_used_fid, &body->oa.o_oi);
 686
 687         ptlrpc_request_set_replen(req);
 688
 689         /* Don't resend the delorphan req */
 690         req->rq_no_resend = req->rq_no_delay = 1;
 691
 692         rc = ptlrpc_queue_wait(req);
 693         if (rc) {
 694                 update_status = 1;
 695                 GOTO(out, rc);
 696         }
 697
 698         body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 699         if (body == NULL)
 700                 GOTO(out, rc = -EPROTO);
 701
 702         /*
 703          * OST provides us with id new pool starts from in body->oa.o_id
 704          */
 705         fid_ostid_unpack(last_fid, &body->oa.o_oi, d->opd_index);
 706         CDEBUG(D_INFO, "%s: last_fid "DFID" server last fid "DFID"\n",
 707                d->opd_obd->obd_name, PFID(&d->opd_last_used_fid),
 708                PFID(last_fid));
 709
 710         spin_lock(&d->opd_pre_lock);
 711         diff = lu_fid_diff(&d->opd_last_used_fid, last_fid);
 712         if (diff > 0) {
 713                 d->opd_pre_grow_count = OST_MIN_PRECREATE + diff;
 714                 d->opd_pre_last_created_fid = d->opd_last_used_fid;
 715         } else {
 716                 d->opd_pre_grow_count = OST_MIN_PRECREATE;
 717                 d->opd_pre_last_created_fid = *last_fid;
 718         }
 719         /*
 720          * This empties the pre-creation pool and effectively blocks any new
 721          * reservations.
 722          */
 723         LASSERT(fid_oid(&d->opd_pre_last_created_fid) <=
 724                 LUSTRE_DATA_SEQ_MAX_WIDTH);
 725         d->opd_pre_used_fid = d->opd_pre_last_created_fid;
 726         d->opd_pre_grow_slow = 0;
 727         spin_unlock(&d->opd_pre_lock);
 728
 729         CDEBUG(D_HA, "%s: Got last_id "DFID" from OST, last_created "DFID
 730                "last_used is "DFID"\n", d->opd_obd->obd_name, PFID(last_fid),
 731                PFID(&d->opd_pre_last_created_fid), PFID(&d->opd_last_used_fid));
 732 out:
 733         if (req)
 734                 ptlrpc_req_finished(req);
 735
 736         d->opd_pre_recovering = 0;
 737
 738         /*
 739          * If rc is zero, the pre-creation window should have been emptied.
 740          * Since waking up the herd would be useless without pre-created
 741          * objects, we defer the signal to osp_precreate_send() in that case.
 742          */
 743         if (rc != 0) {
 744                 if (update_status) {
 745                         CERROR("%s: cannot cleanup orphans: rc = %d\n",
 746                                d->opd_obd->obd_name, rc);
 747                         /* we can't proceed from here, OST seem to
 748                          * be in a bad shape, better to wait for
 749                          * a new instance of the server and repeat
 750                          * from the beginning. notify possible waiters
 751                          * this OSP isn't quite functional yet */
 752                         osp_pre_update_status(d, rc);
 753                 } else {
 754                         cfs_waitq_signal(&d->opd_pre_user_waitq);
 755                 }
 756         }
 757
 758         RETURN(rc);
 759 }
 760
 761 /*
 762  * the function updates current precreation status used: functional or not
 763  *
 764  * rc is a last code from the transport, rc == 0 meaning transport works
 765  * well and users of lod can use objects from this OSP
 766  *
 767  * the status depends on current usage of OST
 768  */
 769 void osp_pre_update_status(struct osp_device *d, int rc)
 770 {
 771         struct obd_statfs       *msfs = &d->opd_statfs;
 772         int                      old = d->opd_pre_status;
 773         __u64                    used;
 774
 775         d->opd_pre_status = rc;
 776         if (rc)
 777                 goto out;
 778
 779         /* Add a bit of hysteresis so this flag isn't continually flapping,
 780          * and ensure that new files don't get extremely fragmented due to
 781          * only a small amount of available space in the filesystem.
 782          * We want to set the NOSPC flag when there is less than ~0.1% free
 783          * and clear it when there is at least ~0.2% free space, so:
 784          *                   avail < ~0.1% max          max = avail + used
 785          *            1025 * avail < avail + used       used = blocks - free
 786          *            1024 * avail < used
 787          *            1024 * avail < blocks - free
 788          *                   avail < ((blocks - free) >> 10)
 789          *
 790          * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
 791          * lose that amount of space so in those cases we report no space left
 792          * if their is less than 1 GB left.                             */
 793         if (likely(msfs->os_type)) {
 794                 used = min_t(__u64, (msfs->os_blocks - msfs->os_bfree) >> 10,
 795                                     1 << 30);
 796                 if ((msfs->os_ffree < 32) || (msfs->os_bavail < used)) {
 797                         d->opd_pre_status = -ENOSPC;
 798                         if (old != -ENOSPC)
 799                                 CDEBUG(D_INFO, "%s: status: "LPU64" blocks, "
 800                                        LPU64" free, "LPU64" used, "LPU64" "
 801                                        "avail -> %d: rc = %d\n",
 802                                        d->opd_obd->obd_name, msfs->os_blocks,
 803                                        msfs->os_bfree, used, msfs->os_bavail,
 804                                        d->opd_pre_status, rc);
 805                         CDEBUG(D_INFO,
 806                                "non-commited changes: %lu, in progress: %u\n",
 807                                d->opd_syn_changes, d->opd_syn_rpc_in_progress);
 808                 } else if (old == -ENOSPC) {
 809                         d->opd_pre_status = 0;
 810                         d->opd_pre_grow_slow = 0;
 811                         d->opd_pre_grow_count = OST_MIN_PRECREATE;
 812                         cfs_waitq_signal(&d->opd_pre_waitq);
 813                         CDEBUG(D_INFO, "%s: no space: "LPU64" blocks, "LPU64
 814                                " free, "LPU64" used, "LPU64" avail -> %d: "
 815                                "rc = %d\n", d->opd_obd->obd_name,
 816                                msfs->os_blocks, msfs->os_bfree, used,
 817                                msfs->os_bavail, d->opd_pre_status, rc);
 818                 }
 819         }
 820
 821 out:
 822         cfs_waitq_signal(&d->opd_pre_user_waitq);
 823 }
 824
 825 static int osp_init_pre_fid(struct osp_device *osp)
 826 {
 827         struct lu_env           env;
 828         struct osp_thread_info  *osi;
 829         struct lu_client_seq    *cli_seq;
 830         struct lu_fid           *last_fid;
 831         int                     rc;
 832         ENTRY;
 833
 834         /* Return if last_used fid has been initialized */
 835         if (!fid_is_zero(&osp->opd_last_used_fid))
 836                 RETURN(0);
 837
 838         rc = lu_env_init(&env, osp->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
 839         if (rc) {
 840                 CERROR("%s: init env error: rc = %d\n",
 841                        osp->opd_obd->obd_name, rc);
 842                 RETURN(rc);
 843         }
 844
 845         osi = osp_env_info(&env);
 846         last_fid = &osi->osi_fid;
 847         fid_zero(last_fid);
 848         /* For a freshed fs, it will allocate a new sequence first */
 849         if (osp_is_fid_client(osp) && osp->opd_group != 0) {
 850                 cli_seq = osp->opd_obd->u.cli.cl_seq;
 851                 rc = seq_client_get_seq(&env, cli_seq, &last_fid->f_seq);
 852                 if (rc != 0) {
 853                         CERROR("%s: alloc fid error: rc = %d\n",
 854                                osp->opd_obd->obd_name, rc);
 855                         GOTO(out, rc);
 856                 }
 857         } else {
 858                 last_fid->f_seq = fid_idif_seq(0, osp->opd_index);
 859         }
 860         last_fid->f_oid = 1;
 861         last_fid->f_ver = 0;
 862
 863         spin_lock(&osp->opd_pre_lock);
 864         osp->opd_last_used_fid = *last_fid;
 865         osp->opd_pre_used_fid = *last_fid;
 866         osp->opd_pre_last_created_fid = *last_fid;
 867         spin_unlock(&osp->opd_pre_lock);
 868         rc = osp_write_last_oid_seq_files(&env, osp, last_fid, 1);
 869         if (rc != 0) {
 870                 CERROR("%s: write fid error: rc = %d\n",
 871                        osp->opd_obd->obd_name, rc);
 872                 GOTO(out, rc);
 873         }
 874 out:
 875         lu_env_fini(&env);
 876         RETURN(rc);
 877 }
 878
 879 static int osp_precreate_thread(void *_arg)
 880 {
 881         struct osp_device       *d = _arg;
 882         struct ptlrpc_thread    *thread = &d->opd_pre_thread;
 883         struct l_wait_info       lwi = { 0 };
 884         char                     pname[16];
 885         struct lu_env            env;
 886         int                      rc;
 887
 888         ENTRY;
 889
 890         sprintf(pname, "osp-pre-%u", d->opd_index);
 891         cfs_daemonize(pname);
 892
 893         rc = lu_env_init(&env, d->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
 894         if (rc) {
 895                 CERROR("%s: init env error: rc = %d\n", d->opd_obd->obd_name,
 896                        rc);
 897                 RETURN(rc);
 898         }
 899
 900         spin_lock(&d->opd_pre_lock);
 901         thread->t_flags = SVC_RUNNING;
 902         spin_unlock(&d->opd_pre_lock);
 903         cfs_waitq_signal(&thread->t_ctl_waitq);
 904
 905         while (osp_precreate_running(d)) {
 906                 /*
 907                  * need to be connected to OST
 908                  */
 909                 while (osp_precreate_running(d)) {
 910                         l_wait_event(d->opd_pre_waitq,
 911                                      !osp_precreate_running(d) ||
 912                                      d->opd_new_connection,
 913                                      &lwi);
 914
 915                         if (!d->opd_new_connection)
 916                                 continue;
 917
 918                         d->opd_new_connection = 0;
 919                         d->opd_got_disconnected = 0;
 920                         break;
 921                 }
 922
 923                 if (!osp_precreate_running(d))
 924                         break;
 925
 926                 LASSERT(d->opd_obd->u.cli.cl_seq != NULL);
 927                 if (d->opd_obd->u.cli.cl_seq->lcs_exp == NULL) {
 928                         /* Get new sequence for client first */
 929                         LASSERT(d->opd_exp != NULL);
 930                         d->opd_obd->u.cli.cl_seq->lcs_exp =
 931                         class_export_get(d->opd_exp);
 932                         rc = osp_init_pre_fid(d);
 933                         if (rc != 0) {
 934                                 class_export_put(d->opd_exp);
 935                                 d->opd_obd->u.cli.cl_seq->lcs_exp = NULL;
 936                                 CERROR("%s: init pre fid error: rc = %d\n",
 937                                        d->opd_obd->obd_name, rc);
 938                                 continue;
 939                         }
 940                 }
 941
 942                 osp_statfs_update(d);
 943
 944                 /*
 945                  * Clean up orphans or recreate missing objects.
 946                  */
 947                 rc = osp_precreate_cleanup_orphans(&env, d);
 948                 if (rc != 0)
 949                         continue;
 950                 /*
 951                  * connected, can handle precreates now
 952                  */
 953                 while (osp_precreate_running(d)) {
 954                         l_wait_event(d->opd_pre_waitq,
 955                                      !osp_precreate_running(d) ||
 956                                      osp_precreate_near_empty(&env, d) ||
 957                                      osp_statfs_need_update(d) ||
 958                                      d->opd_got_disconnected, &lwi);
 959
 960                         if (!osp_precreate_running(d))
 961                                 break;
 962
 963                         /* something happened to the connection
 964                          * have to start from the beginning */
 965                         if (d->opd_got_disconnected)
 966                                 break;
 967
 968                         if (osp_statfs_need_update(d))
 969                                 osp_statfs_update(d);
 970
 971                         /* To avoid handling different seq in precreate/orphan
 972                          * cleanup, it will hold precreate until current seq is
 973                          * used up. */
 974                         if (unlikely(osp_precreate_end_seq(&env, d) &&
 975                             !osp_create_end_seq(&env, d)))
 976                                 continue;
 977
 978                         if (unlikely(osp_precreate_end_seq(&env, d) &&
 979                                      osp_create_end_seq(&env, d))) {
 980                                 LCONSOLE_INFO("%s:"LPX64" is used up."
 981                                               " Update to new seq\n",
 982                                               d->opd_obd->obd_name,
 983                                          fid_seq(&d->opd_pre_last_created_fid));
 984                                 rc = osp_precreate_rollover_new_seq(&env, d);
 985                                 if (rc)
 986                                         continue;
 987                         }
 988
 989                         if (osp_precreate_near_empty(&env, d)) {
 990                                 rc = osp_precreate_send(&env, d);
 991                                 /* osp_precreate_send() sets opd_pre_status
 992                                  * in case of error, that prevent the using of
 993                                  * failed device. */
 994                                 if (rc < 0 && rc != -ENOSPC &&
 995                                     rc != -ETIMEDOUT && rc != -ENOTCONN)
 996                                         CERROR("%s: cannot precreate objects:"
 997                                                " rc = %d\n",
 998                                                d->opd_obd->obd_name, rc);
 999                         }
1000                 }
1001         }
1002
1003         thread->t_flags = SVC_STOPPED;
1004         lu_env_fini(&env);
1005         cfs_waitq_signal(&thread->t_ctl_waitq);
1006
1007         RETURN(0);
1008 }
1009
1010 static int osp_precreate_ready_condition(const struct lu_env *env,
1011                                          struct osp_device *d)
1012 {
1013         if (d->opd_pre_recovering)
1014                 return 0;
1015
1016         /* ready if got enough precreated objects */
1017         /* we need to wait for others (opd_pre_reserved) and our object (+1) */
1018         if (d->opd_pre_reserved + 1 < osp_objs_precreated(env, d))
1019                 return 1;
1020
1021         /* ready if OST reported no space and no destoys in progress */
1022         if (d->opd_syn_changes + d->opd_syn_rpc_in_progress == 0 &&
1023             d->opd_pre_status == -ENOSPC)
1024                 return 1;
1025
1026         return 0;
1027 }
1028
1029 static int osp_precreate_timeout_condition(void *data)
1030 {
1031         struct osp_device *d = data;
1032
1033         LCONSOLE_WARN("%s: slow creates, last="DFID", next="DFID", "
1034                       "reserved="LPU64", syn_changes=%lu, "
1035                       "syn_rpc_in_progress=%d, status=%d\n",
1036                       d->opd_obd->obd_name, PFID(&d->opd_pre_last_created_fid),
1037                       PFID(&d->opd_pre_used_fid), d->opd_pre_reserved,
1038                       d->opd_syn_changes, d->opd_syn_rpc_in_progress,
1039                       d->opd_pre_status);
1040
1041         return 1;
1042 }
1043
1044 /*
1045  * called to reserve object in the pool
1046  * return codes:
1047  *  ENOSPC - no space on corresponded OST
1048  *  EAGAIN - precreation is in progress, try later
1049  *  EIO    - no access to OST
1050  */
1051 int osp_precreate_reserve(const struct lu_env *env, struct osp_device *d)
1052 {
1053         struct l_wait_info       lwi;
1054         cfs_time_t               expire = cfs_time_shift(obd_timeout);
1055         int                      precreated, rc;
1056         int                      count = 0;
1057
1058         ENTRY;
1059
1060         LASSERTF(osp_objs_precreated(env, d) >= 0, "Last created FID "DFID
1061                  "Next FID "DFID"\n", PFID(&d->opd_pre_last_created_fid),
1062                  PFID(&d->opd_pre_used_fid));
1063
1064         /*
1065          * wait till:
1066          *  - preallocation is done
1067          *  - no free space expected soon
1068          *  - can't connect to OST for too long (obd_timeout)
1069          *  - OST can allocate fid sequence.
1070          */
1071         while ((rc = d->opd_pre_status) == 0 || rc == -ENOSPC ||
1072                 rc == -ENODEV || rc == -EAGAIN) {
1073
1074 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 3, 90, 0)
1075                 /*
1076                  * to address Andreas's concern on possible busy-loop
1077                  * between this thread and osp_precreate_send()
1078                  */
1079                 if (unlikely(count++ == 1000)) {
1080                         osp_precreate_timeout_condition(d);
1081                         LBUG();
1082                 }
1083 #endif
1084
1085                 /*
1086                  * increase number of precreations
1087                  */
1088                 precreated = osp_objs_precreated(env, d);
1089                 if (d->opd_pre_grow_count < d->opd_pre_max_grow_count &&
1090                     d->opd_pre_grow_slow == 0 &&
1091                     precreated <= (d->opd_pre_grow_count / 4 + 1)) {
1092                         spin_lock(&d->opd_pre_lock);
1093                         d->opd_pre_grow_slow = 1;
1094                         d->opd_pre_grow_count *= 2;
1095                         spin_unlock(&d->opd_pre_lock);
1096                 }
1097
1098                 spin_lock(&d->opd_pre_lock);
1099                 precreated = osp_objs_precreated(env, d);
1100                 if (precreated > d->opd_pre_reserved &&
1101                     !d->opd_pre_recovering) {
1102                         d->opd_pre_reserved++;
1103                         spin_unlock(&d->opd_pre_lock);
1104                         rc = 0;
1105
1106                         /* XXX: don't wake up if precreation is in progress */
1107                         if (osp_precreate_near_empty_nolock(env, d) &&
1108                            !osp_precreate_end_seq_nolock(env, d))
1109                                 cfs_waitq_signal(&d->opd_pre_waitq);
1110
1111                         break;
1112                 }
1113                 spin_unlock(&d->opd_pre_lock);
1114
1115                 /*
1116                  * all precreated objects have been used and no-space
1117                  * status leave us no chance to succeed very soon
1118                  * but if there is destroy in progress, then we should
1119                  * wait till that is done - some space might be released
1120                  */
1121                 if (unlikely(rc == -ENOSPC)) {
1122                         if (d->opd_syn_changes) {
1123                                 /* force local commit to release space */
1124                                 dt_commit_async(env, d->opd_storage);
1125                         }
1126                         if (d->opd_syn_rpc_in_progress) {
1127                                 /* just wait till destroys are done */
1128                                 /* see l_wait_even() few lines below */
1129                         }
1130                         if (d->opd_syn_changes +
1131                             d->opd_syn_rpc_in_progress == 0) {
1132                                 /* no hope for free space */
1133                                 break;
1134                         }
1135                 }
1136
1137                 /* XXX: don't wake up if precreation is in progress */
1138                 cfs_waitq_signal(&d->opd_pre_waitq);
1139
1140                 lwi = LWI_TIMEOUT(expire - cfs_time_current(),
1141                                 osp_precreate_timeout_condition, d);
1142                 if (cfs_time_aftereq(cfs_time_current(), expire)) {
1143                         rc = -ETIMEDOUT;
1144                         break;
1145                 }
1146
1147                 l_wait_event(d->opd_pre_user_waitq,
1148                              osp_precreate_ready_condition(env, d), &lwi);
1149         }
1150
1151         RETURN(rc);
1152 }
1153
1154 /*
1155  * this function relies on reservation made before
1156  */
1157 int osp_precreate_get_fid(const struct lu_env *env, struct osp_device *d,
1158                           struct lu_fid *fid)
1159 {
1160         /* grab next id from the pool */
1161         spin_lock(&d->opd_pre_lock);
1162
1163         LASSERTF(lu_fid_diff(&d->opd_pre_used_fid,
1164                              &d->opd_pre_last_created_fid) < 0,
1165                  "next fid "DFID" last created fid "DFID"\n",
1166                  PFID(&d->opd_pre_used_fid),
1167                  PFID(&d->opd_pre_last_created_fid));
1168
1169         d->opd_pre_used_fid.f_oid++;
1170         memcpy(fid, &d->opd_pre_used_fid, sizeof(*fid));
1171         d->opd_pre_reserved--;
1172         /*
1173          * last_used_id must be changed along with getting new id otherwise
1174          * we might miscalculate gap causing object loss or leak
1175          */
1176         osp_update_last_fid(d, fid);
1177         spin_unlock(&d->opd_pre_lock);
1178
1179         /*
1180          * probably main thread suspended orphan cleanup till
1181          * all reservations are released, see comment in
1182          * osp_precreate_thread() just before orphan cleanup
1183          */
1184         if (unlikely(d->opd_pre_reserved == 0 && d->opd_pre_status))
1185                 cfs_waitq_signal(&d->opd_pre_waitq);
1186
1187         return 0;
1188 }
1189
1190 /*
1191  *
1192  */
1193 int osp_object_truncate(const struct lu_env *env, struct dt_object *dt,
1194                         __u64 size)
1195 {
1196         struct osp_device       *d = lu2osp_dev(dt->do_lu.lo_dev);
1197         struct ptlrpc_request   *req = NULL;
1198         struct obd_import       *imp;
1199         struct ost_body         *body;
1200         struct obdo             *oa = NULL;
1201         int                      rc;
1202
1203         ENTRY;
1204
1205         imp = d->opd_obd->u.cli.cl_import;
1206         LASSERT(imp);
1207
1208         req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
1209         if (req == NULL)
1210                 RETURN(-ENOMEM);
1211
1212         /* XXX: capa support? */
1213         /* osc_set_capa_size(req, &RMF_CAPA1, capa); */
1214         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
1215         if (rc) {
1216                 ptlrpc_request_free(req);
1217                 RETURN(rc);
1218         }
1219
1220         /*
1221          * XXX: decide how do we do here with resend
1222          * if we don't resend, then client may see wrong file size
1223          * if we do resend, then MDS thread can get stuck for quite long
1224          */
1225         req->rq_no_resend = req->rq_no_delay = 1;
1226
1227         req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1228         ptlrpc_at_set_req_timeout(req);
1229
1230         OBD_ALLOC_PTR(oa);
1231         if (oa == NULL)
1232                 GOTO(out, rc = -ENOMEM);
1233
1234         rc = fid_ostid_pack(lu_object_fid(&dt->do_lu), &oa->o_oi);
1235         LASSERT(rc == 0);
1236         oa->o_size = size;
1237         oa->o_blocks = OBD_OBJECT_EOF;
1238         oa->o_valid = OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1239                       OBD_MD_FLID | OBD_MD_FLGROUP;
1240
1241         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1242         LASSERT(body);
1243         lustre_set_wire_obdo(&body->oa, oa);
1244
1245         /* XXX: capa support? */
1246         /* osc_pack_capa(req, body, capa); */
1247
1248         ptlrpc_request_set_replen(req);
1249
1250         rc = ptlrpc_queue_wait(req);
1251         if (rc)
1252                 CERROR("can't punch object: %d\n", rc);
1253 out:
1254         ptlrpc_req_finished(req);
1255         if (oa)
1256                 OBD_FREE_PTR(oa);
1257         RETURN(rc);
1258 }
1259
1260 int osp_init_precreate(struct osp_device *d)
1261 {
1262         struct l_wait_info       lwi = { 0 };
1263         int                      rc;
1264
1265         ENTRY;
1266
1267         /* initially precreation isn't ready */
1268         d->opd_pre_status = -EAGAIN;
1269         fid_zero(&d->opd_pre_used_fid);
1270         d->opd_pre_used_fid.f_oid = 1;
1271         fid_zero(&d->opd_pre_last_created_fid);
1272         d->opd_pre_last_created_fid.f_oid = 1;
1273         d->opd_pre_reserved = 0;
1274         d->opd_got_disconnected = 1;
1275         d->opd_pre_grow_slow = 0;
1276         d->opd_pre_grow_count = OST_MIN_PRECREATE;
1277         d->opd_pre_min_grow_count = OST_MIN_PRECREATE;
1278         d->opd_pre_max_grow_count = OST_MAX_PRECREATE;
1279
1280         spin_lock_init(&d->opd_pre_lock);
1281         cfs_waitq_init(&d->opd_pre_waitq);
1282         cfs_waitq_init(&d->opd_pre_user_waitq);
1283         cfs_waitq_init(&d->opd_pre_thread.t_ctl_waitq);
1284
1285         /*
1286          * Initialize statfs-related things
1287          */
1288         d->opd_statfs_maxage = 5; /* default update interval */
1289         d->opd_statfs_fresh_till = cfs_time_shift(-1000);
1290         CDEBUG(D_OTHER, "current %llu, fresh till %llu\n",
1291                (unsigned long long)cfs_time_current(),
1292                (unsigned long long)d->opd_statfs_fresh_till);
1293         cfs_timer_init(&d->opd_statfs_timer, osp_statfs_timer_cb, d);
1294
1295         /*
1296          * start thread handling precreation and statfs updates
1297          */
1298         rc = cfs_create_thread(osp_precreate_thread, d, 0);
1299         if (rc < 0) {
1300                 CERROR("can't start precreate thread %d\n", rc);
1301                 RETURN(rc);
1302         }
1303
1304         l_wait_event(d->opd_pre_thread.t_ctl_waitq,
1305                      osp_precreate_running(d) || osp_precreate_stopped(d),
1306                      &lwi);
1307
1308         RETURN(0);
1309 }
1310
1311 void osp_precreate_fini(struct osp_device *d)
1312 {
1313         struct ptlrpc_thread *thread = &d->opd_pre_thread;
1314
1315         ENTRY;
1316
1317         cfs_timer_disarm(&d->opd_statfs_timer);
1318
1319         thread->t_flags = SVC_STOPPING;
1320         cfs_waitq_signal(&d->opd_pre_waitq);
1321
1322         cfs_wait_event(thread->t_ctl_waitq, thread->t_flags & SVC_STOPPED);
1323
1324         EXIT;
1325 }
1326