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, 2013, 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 #define DEBUG_SUBSYSTEM S_MDS
  46
  47 #include "osp_internal.h"
  48
  49 /*
  50  * there are two specific states to take care about:
  51  *
  52  * = import is disconnected =
  53  *
  54  * = import is inactive =
  55  *   in this case osp_declare_object_create() returns an error
  56  *
  57  */
  58
  59 /*
  60  * statfs
  61  */
  62 static inline int osp_statfs_need_update(struct osp_device *d)
  63 {
  64         return !cfs_time_before(cfs_time_current(),
  65                                 d->opd_statfs_fresh_till);
  66 }
  67
  68 /*
  69  * OSP tries to maintain pool of available objects so that calls to create
  70  * objects don't block most of time
  71  *
  72  * each time OSP gets connected to OST, we should start from precreation cleanup
  73  */
  74 static inline bool osp_precreate_running(struct osp_device *d)
  75 {
  76         return !!(d->opd_pre_thread.t_flags & SVC_RUNNING);
  77 }
  78
  79 static inline bool osp_precreate_stopped(struct osp_device *d)
  80 {
  81         return !!(d->opd_pre_thread.t_flags & SVC_STOPPED);
  82 }
  83
  84 static void osp_statfs_timer_cb(unsigned long _d)
  85 {
  86         struct osp_device *d = (struct osp_device *) _d;
  87
  88         LASSERT(d);
  89         if (d->opd_pre != NULL && osp_precreate_running(d))
  90                 wake_up(&d->opd_pre_waitq);
  91 }
  92
  93 static int osp_statfs_interpret(const struct lu_env *env,
  94                                 struct ptlrpc_request *req,
  95                                 union ptlrpc_async_args *aa, int rc)
  96 {
  97         struct obd_import       *imp = req->rq_import;
  98         struct obd_statfs       *msfs;
  99         struct osp_device       *d;
 100
 101         ENTRY;
 102
 103         aa = ptlrpc_req_async_args(req);
 104         d = aa->pointer_arg[0];
 105         LASSERT(d);
 106
 107         if (rc != 0)
 108                 GOTO(out, rc);
 109
 110         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
 111         if (msfs == NULL)
 112                 GOTO(out, rc = -EPROTO);
 113
 114         d->opd_statfs = *msfs;
 115
 116         osp_pre_update_status(d, rc);
 117
 118         /* schedule next update */
 119         d->opd_statfs_fresh_till = cfs_time_shift(d->opd_statfs_maxage);
 120         cfs_timer_arm(&d->opd_statfs_timer, d->opd_statfs_fresh_till);
 121         d->opd_statfs_update_in_progress = 0;
 122
 123         CDEBUG(D_CACHE, "updated statfs %p\n", d);
 124
 125         RETURN(0);
 126 out:
 127         /* couldn't update statfs, try again as soon as possible */
 128         if (d->opd_pre != NULL && osp_precreate_running(d))
 129                 wake_up(&d->opd_pre_waitq);
 130
 131         if (req->rq_import_generation == imp->imp_generation)
 132                 CDEBUG(D_CACHE, "%s: couldn't update statfs: rc = %d\n",
 133                        d->opd_obd->obd_name, rc);
 134         RETURN(rc);
 135 }
 136
 137 static int osp_statfs_update(struct osp_device *d)
 138 {
 139         struct ptlrpc_request   *req;
 140         struct obd_import       *imp;
 141         union ptlrpc_async_args *aa;
 142         int                      rc;
 143
 144         ENTRY;
 145
 146         CDEBUG(D_CACHE, "going to update statfs\n");
 147
 148         imp = d->opd_obd->u.cli.cl_import;
 149         LASSERT(imp);
 150
 151         req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 152         if (req == NULL)
 153                 RETURN(-ENOMEM);
 154
 155         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
 156         if (rc) {
 157                 ptlrpc_request_free(req);
 158                 RETURN(rc);
 159         }
 160         ptlrpc_request_set_replen(req);
 161         req->rq_request_portal = OST_CREATE_PORTAL;
 162         ptlrpc_at_set_req_timeout(req);
 163
 164         req->rq_interpret_reply = (ptlrpc_interpterer_t)osp_statfs_interpret;
 165         aa = ptlrpc_req_async_args(req);
 166         aa->pointer_arg[0] = d;
 167
 168         /*
 169          * no updates till reply
 170          */
 171         cfs_timer_disarm(&d->opd_statfs_timer);
 172         d->opd_statfs_fresh_till = cfs_time_shift(obd_timeout * 1000);
 173         d->opd_statfs_update_in_progress = 1;
 174
 175         ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
 176
 177         RETURN(0);
 178 }
 179
 180 /*
 181  * XXX: there might be a case where removed object(s) do not add free
 182  * space (empty object). if the number of such deletions is high, then
 183  * we can start to update statfs too often - a rpc storm
 184  * TODO: some throttling is needed
 185  */
 186 void osp_statfs_need_now(struct osp_device *d)
 187 {
 188         if (!d->opd_statfs_update_in_progress) {
 189                 /*
 190                  * if current status is -ENOSPC (lack of free space on OST)
 191                  * then we should poll OST immediately once object destroy
 192                  * is replied
 193                  */
 194                 d->opd_statfs_fresh_till = cfs_time_shift(-1);
 195                 cfs_timer_disarm(&d->opd_statfs_timer);
 196                 wake_up(&d->opd_pre_waitq);
 197         }
 198 }
 199
 200 static inline int osp_objs_precreated(const struct lu_env *env,
 201                                       struct osp_device *osp)
 202 {
 203         return osp_fid_diff(&osp->opd_pre_last_created_fid,
 204                             &osp->opd_pre_used_fid);
 205 }
 206
 207 static inline int osp_precreate_near_empty_nolock(const struct lu_env *env,
 208                                                   struct osp_device *d)
 209 {
 210         int window = osp_objs_precreated(env, d);
 211
 212         /* don't consider new precreation till OST is healty and
 213          * has free space */
 214         return ((window - d->opd_pre_reserved < d->opd_pre_grow_count / 2) &&
 215                 (d->opd_pre_status == 0));
 216 }
 217
 218 static inline int osp_precreate_near_empty(const struct lu_env *env,
 219                                            struct osp_device *d)
 220 {
 221         int rc;
 222
 223         /* XXX: do we really need locking here? */
 224         spin_lock(&d->opd_pre_lock);
 225         rc = osp_precreate_near_empty_nolock(env, d);
 226         spin_unlock(&d->opd_pre_lock);
 227         return rc;
 228 }
 229
 230 static inline int osp_create_end_seq(const struct lu_env *env,
 231                                      struct osp_device *osp)
 232 {
 233         struct lu_fid *fid = &osp->opd_pre_used_fid;
 234         int rc;
 235
 236         spin_lock(&osp->opd_pre_lock);
 237         rc = osp_fid_end_seq(env, fid);
 238         spin_unlock(&osp->opd_pre_lock);
 239         return rc;
 240 }
 241
 242 /**
 243  * Write fid into last_oid/last_seq file.
 244  **/
 245 int osp_write_last_oid_seq_files(struct lu_env *env, struct osp_device *osp,
 246                                  struct lu_fid *fid, int sync)
 247 {
 248         struct osp_thread_info  *oti = osp_env_info(env);
 249         struct lu_buf      *lb_oid = &oti->osi_lb;
 250         struct lu_buf      *lb_oseq = &oti->osi_lb2;
 251         loff_t             oid_off;
 252         loff_t             oseq_off;
 253         struct thandle    *th;
 254         int                   rc;
 255         ENTRY;
 256
 257         /* Note: through f_oid is only 32bits, it will also write
 258          * 64 bits for oid to keep compatiblity with the previous
 259          * version. */
 260         lb_oid->lb_buf = &fid->f_oid;
 261         lb_oid->lb_len = sizeof(obd_id);
 262         oid_off = sizeof(obd_id) * osp->opd_index;
 263
 264         lb_oseq->lb_buf = &fid->f_seq;
 265         lb_oseq->lb_len = sizeof(obd_id);
 266         oseq_off = sizeof(obd_id) * osp->opd_index;
 267
 268         th = dt_trans_create(env, osp->opd_storage);
 269         if (IS_ERR(th))
 270                 RETURN(PTR_ERR(th));
 271
 272         th->th_sync |= sync;
 273         rc = dt_declare_record_write(env, osp->opd_last_used_oid_file,
 274                                      lb_oid, oid_off, th);
 275         if (rc != 0)
 276                 GOTO(out, rc);
 277
 278         rc = dt_declare_record_write(env, osp->opd_last_used_seq_file,
 279                                      lb_oseq, oseq_off, th);
 280         if (rc != 0)
 281                 GOTO(out, rc);
 282
 283         rc = dt_trans_start_local(env, osp->opd_storage, th);
 284         if (rc != 0)
 285                 GOTO(out, rc);
 286
 287         rc = dt_record_write(env, osp->opd_last_used_oid_file, lb_oid,
 288                              &oid_off, th);
 289         if (rc != 0) {
 290                 CERROR("%s: can not write to last seq file: rc = %d\n",
 291                         osp->opd_obd->obd_name, rc);
 292                 GOTO(out, rc);
 293         }
 294         rc = dt_record_write(env, osp->opd_last_used_seq_file, lb_oseq,
 295                              &oseq_off, th);
 296         if (rc) {
 297                 CERROR("%s: can not write to last seq file: rc = %d\n",
 298                         osp->opd_obd->obd_name, rc);
 299                 GOTO(out, rc);
 300         }
 301 out:
 302         dt_trans_stop(env, osp->opd_storage, th);
 303         RETURN(rc);
 304 }
 305
 306 int osp_precreate_rollover_new_seq(struct lu_env *env, struct osp_device *osp)
 307 {
 308         struct lu_fid   *fid = &osp_env_info(env)->osi_fid;
 309         struct lu_fid   *last_fid = &osp->opd_last_used_fid;
 310         int             rc;
 311         ENTRY;
 312
 313         rc = seq_client_get_seq(env, osp->opd_obd->u.cli.cl_seq, &fid->f_seq);
 314         if (rc != 0) {
 315                 CERROR("%s: alloc fid error: rc = %d\n",
 316                        osp->opd_obd->obd_name, rc);
 317                 RETURN(rc);
 318         }
 319
 320         fid->f_oid = 1;
 321         fid->f_ver = 0;
 322         LASSERTF(fid_seq(fid) != fid_seq(last_fid),
 323                  "fid "DFID", last_fid "DFID"\n", PFID(fid),
 324                  PFID(last_fid));
 325
 326         rc = osp_write_last_oid_seq_files(env, osp, fid, 1);
 327         if (rc != 0) {
 328                 CERROR("%s: Can not update oid/seq file: rc = %d\n",
 329                        osp->opd_obd->obd_name, rc);
 330                 RETURN(rc);
 331         }
 332
 333         LCONSOLE_INFO("%s: update sequence from "LPX64" to "LPX64"\n",
 334                       osp->opd_obd->obd_name, fid_seq(last_fid),
 335                       fid_seq(fid));
 336         /* Update last_xxx to the new seq */
 337         spin_lock(&osp->opd_pre_lock);
 338         osp->opd_last_used_fid = *fid;
 339         osp->opd_gap_start_fid = *fid;
 340         osp->opd_pre_used_fid = *fid;
 341         osp->opd_pre_last_created_fid = *fid;
 342         spin_unlock(&osp->opd_pre_lock);
 343
 344         RETURN(rc);
 345 }
 346
 347 /**
 348  * alloc fids for precreation.
 349  * rc = 0 Success, @grow is the count of real allocation.
 350  * rc = 1 Current seq is used up.
 351  * rc < 0 Other error.
 352  **/
 353 static int osp_precreate_fids(const struct lu_env *env, struct osp_device *osp,
 354                               struct lu_fid *fid, int *grow)
 355 {
 356         struct osp_thread_info  *osi = osp_env_info(env);
 357         __u64                   end;
 358         int                     i = 0;
 359
 360         if (fid_is_idif(fid)) {
 361                 struct lu_fid   *last_fid;
 362                 struct ost_id   *oi = &osi->osi_oi;
 363
 364                 spin_lock(&osp->opd_pre_lock);
 365                 last_fid = &osp->opd_pre_last_created_fid;
 366                 fid_to_ostid(last_fid, oi);
 367                 end = min(ostid_id(oi) + *grow, IDIF_MAX_OID);
 368                 *grow = end - ostid_id(oi);
 369                 ostid_set_id(oi, ostid_id(oi) + *grow);
 370                 spin_unlock(&osp->opd_pre_lock);
 371
 372                 if (*grow == 0)
 373                         return 1;
 374
 375                 ostid_to_fid(fid, oi, osp->opd_index);
 376                 return 0;
 377         }
 378
 379         spin_lock(&osp->opd_pre_lock);
 380         *fid = osp->opd_pre_last_created_fid;
 381         end = fid->f_oid;
 382         end = min((end + *grow), (__u64)LUSTRE_DATA_SEQ_MAX_WIDTH);
 383         *grow = end - fid->f_oid;
 384         fid->f_oid += end - fid->f_oid;
 385         spin_unlock(&osp->opd_pre_lock);
 386
 387         CDEBUG(D_INFO, "Expect %d, actual %d ["DFID" -- "DFID"]\n",
 388                *grow, i, PFID(fid), PFID(&osp->opd_pre_last_created_fid));
 389
 390         return *grow > 0 ? 0 : 1;
 391 }
 392
 393 static int osp_precreate_send(const struct lu_env *env, struct osp_device *d)
 394 {
 395         struct osp_thread_info  *oti = osp_env_info(env);
 396         struct ptlrpc_request   *req;
 397         struct obd_import       *imp;
 398         struct ost_body         *body;
 399         int                      rc, grow, diff;
 400         struct lu_fid           *fid = &oti->osi_fid;
 401         ENTRY;
 402
 403         /* don't precreate new objects till OST healthy and has free space */
 404         if (unlikely(d->opd_pre_status)) {
 405                 CDEBUG(D_INFO, "%s: don't send new precreate: rc = %d\n",
 406                        d->opd_obd->obd_name, d->opd_pre_status);
 407                 RETURN(0);
 408         }
 409
 410         /*
 411          * if not connection/initialization is compeleted, ignore
 412          */
 413         imp = d->opd_obd->u.cli.cl_import;
 414         LASSERT(imp);
 415
 416         req = ptlrpc_request_alloc(imp, &RQF_OST_CREATE);
 417         if (req == NULL)
 418                 RETURN(-ENOMEM);
 419         req->rq_request_portal = OST_CREATE_PORTAL;
 420         /* we should not resend create request - anyway we will have delorphan
 421          * and kill these objects */
 422         req->rq_no_delay = req->rq_no_resend = 1;
 423
 424         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
 425         if (rc) {
 426                 ptlrpc_request_free(req);
 427                 RETURN(rc);
 428         }
 429
 430         spin_lock(&d->opd_pre_lock);
 431         if (d->opd_pre_grow_count > d->opd_pre_max_grow_count / 2)
 432                 d->opd_pre_grow_count = d->opd_pre_max_grow_count / 2;
 433         grow = d->opd_pre_grow_count;
 434         spin_unlock(&d->opd_pre_lock);
 435
 436         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 437         LASSERT(body);
 438
 439         *fid = d->opd_pre_last_created_fid;
 440         rc = osp_precreate_fids(env, d, fid, &grow);
 441         if (rc == 1) {
 442                 /* Current seq has been used up*/
 443                 if (!osp_is_fid_client(d)) {
 444                         osp_pre_update_status(d, -ENOSPC);
 445                         rc = -ENOSPC;
 446                 }
 447                 wake_up(&d->opd_pre_waitq);
 448                 GOTO(out_req, rc);
 449         }
 450
 451         if (!osp_is_fid_client(d)) {
 452                 /* Non-FID client will always send seq 0 because of
 453                  * compatiblity */
 454                 LASSERTF(fid_is_idif(fid), "Invalid fid "DFID"\n", PFID(fid));
 455                 fid->f_seq = 0;
 456         }
 457
 458         fid_to_ostid(fid, &body->oa.o_oi);
 459         body->oa.o_valid = OBD_MD_FLGROUP;
 460
 461         ptlrpc_request_set_replen(req);
 462
 463         rc = ptlrpc_queue_wait(req);
 464         if (rc) {
 465                 CERROR("%s: can't precreate: rc = %d\n", d->opd_obd->obd_name,
 466                        rc);
 467                 GOTO(out_req, rc);
 468         }
 469         LASSERT(req->rq_transno == 0);
 470
 471         body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 472         if (body == NULL)
 473                 GOTO(out_req, rc = -EPROTO);
 474
 475         ostid_to_fid(fid, &body->oa.o_oi, d->opd_index);
 476         LASSERTF(osp_fid_diff(fid, &d->opd_pre_used_fid) > 0,
 477                  "reply fid "DFID" pre used fid "DFID"\n", PFID(fid),
 478                  PFID(&d->opd_pre_used_fid));
 479
 480         diff = osp_fid_diff(fid, &d->opd_pre_last_created_fid);
 481
 482         spin_lock(&d->opd_pre_lock);
 483         if (diff < grow) {
 484                 /* the OST has not managed to create all the
 485                  * objects we asked for */
 486                 d->opd_pre_grow_count = max(diff, OST_MIN_PRECREATE);
 487                 d->opd_pre_grow_slow = 1;
 488         } else {
 489                 /* the OST is able to keep up with the work,
 490                  * we could consider increasing grow_count
 491                  * next time if needed */
 492                 d->opd_pre_grow_slow = 0;
 493         }
 494
 495         d->opd_pre_last_created_fid = *fid;
 496         spin_unlock(&d->opd_pre_lock);
 497
 498         CDEBUG(D_HA, "%s: current precreated pool: "DFID"-"DFID"\n",
 499                d->opd_obd->obd_name, PFID(&d->opd_pre_used_fid),
 500                PFID(&d->opd_pre_last_created_fid));
 501 out_req:
 502         /* now we can wakeup all users awaiting for objects */
 503         osp_pre_update_status(d, rc);
 504         wake_up(&d->opd_pre_user_waitq);
 505
 506         ptlrpc_req_finished(req);
 507         RETURN(rc);
 508 }
 509
 510 static int osp_get_lastfid_from_ost(const struct lu_env *env,
 511                                     struct osp_device *d)
 512 {
 513         struct ptlrpc_request   *req = NULL;
 514         struct obd_import       *imp;
 515         struct lu_fid           *last_fid;
 516         char                    *tmp;
 517         int                     rc;
 518         ENTRY;
 519
 520         imp = d->opd_obd->u.cli.cl_import;
 521         LASSERT(imp);
 522
 523         req = ptlrpc_request_alloc(imp, &RQF_OST_GET_INFO_LAST_FID);
 524         if (req == NULL)
 525                 RETURN(-ENOMEM);
 526
 527         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY, RCL_CLIENT,
 528                              sizeof(KEY_LAST_FID));
 529
 530         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
 531         if (rc) {
 532                 ptlrpc_request_free(req);
 533                 RETURN(rc);
 534         }
 535
 536         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
 537         memcpy(tmp, KEY_LAST_FID, sizeof(KEY_LAST_FID));
 538
 539         req->rq_no_delay = req->rq_no_resend = 1;
 540         last_fid = req_capsule_client_get(&req->rq_pill, &RMF_FID);
 541         fid_cpu_to_le(last_fid, &d->opd_last_used_fid);
 542
 543         ptlrpc_request_set_replen(req);
 544
 545         rc = ptlrpc_queue_wait(req);
 546         if (rc) {
 547                 /* bad-bad OST.. let sysadm sort this out */
 548                 if (rc == -ENOTSUPP) {
 549                         CERROR("%s: server does not support FID: rc = %d\n",
 550                                d->opd_obd->obd_name, -ENOTSUPP);
 551                 }
 552                 ptlrpc_set_import_active(imp, 0);
 553                 GOTO(out, rc);
 554         }
 555
 556         last_fid = req_capsule_server_get(&req->rq_pill, &RMF_FID);
 557         if (last_fid == NULL) {
 558                 CERROR("%s: Got last_fid failed.\n", d->opd_obd->obd_name);
 559                 GOTO(out, rc = -EPROTO);
 560         }
 561
 562         if (!fid_is_sane(last_fid)) {
 563                 CERROR("%s: Got insane last_fid "DFID"\n",
 564                        d->opd_obd->obd_name, PFID(last_fid));
 565                 GOTO(out, rc = -EPROTO);
 566         }
 567
 568         /* Only update the last used fid, if the OST has objects for
 569          * this sequence, i.e. fid_oid > 0 */
 570         if (fid_oid(last_fid) > 0)
 571                 d->opd_last_used_fid = *last_fid;
 572
 573         CDEBUG(D_HA, "%s: Got last_fid "DFID"\n", d->opd_obd->obd_name,
 574                PFID(last_fid));
 575
 576 out:
 577         ptlrpc_req_finished(req);
 578         RETURN(rc);
 579 }
 580
 581 /**
 582  * asks OST to clean precreate orphans
 583  * and gets next id for new objects
 584  */
 585 static int osp_precreate_cleanup_orphans(struct lu_env *env,
 586                                          struct osp_device *d)
 587 {
 588         struct osp_thread_info  *osi = osp_env_info(env);
 589         struct lu_fid           *last_fid = &osi->osi_fid;
 590         struct ptlrpc_request   *req = NULL;
 591         struct obd_import       *imp;
 592         struct ost_body         *body;
 593         struct l_wait_info       lwi = { 0 };
 594         int                      update_status = 0;
 595         int                      rc;
 596         int                      diff;
 597
 598         ENTRY;
 599
 600         /*
 601          * wait for local recovery to finish, so we can cleanup orphans
 602          * orphans are all objects since "last used" (assigned), but
 603          * there might be objects reserved and in some cases they won't
 604          * be used. we can't cleanup them till we're sure they won't be
 605          * used. also can't we allow new reservations because they may
 606          * end up getting orphans being cleaned up below. so we block
 607          * new reservations and wait till all reserved objects either
 608          * user or released.
 609          */
 610         spin_lock(&d->opd_pre_lock);
 611         d->opd_pre_recovering = 1;
 612         spin_unlock(&d->opd_pre_lock);
 613         /*
 614          * The locking above makes sure the opd_pre_reserved check below will
 615          * catch all osp_precreate_reserve() calls who find
 616          * "!opd_pre_recovering".
 617          */
 618         l_wait_event(d->opd_pre_waitq,
 619                      (!d->opd_pre_reserved && d->opd_recovery_completed) ||
 620                      !osp_precreate_running(d) || d->opd_got_disconnected,
 621                      &lwi);
 622         if (!osp_precreate_running(d) || d->opd_got_disconnected)
 623                 GOTO(out, rc = -EAGAIN);
 624
 625         CDEBUG(D_HA, "%s: going to cleanup orphans since "DFID"\n",
 626                d->opd_obd->obd_name, PFID(&d->opd_last_used_fid));
 627
 628         *last_fid = d->opd_last_used_fid;
 629         /* The OSP should already get the valid seq now */
 630         LASSERT(!fid_is_zero(last_fid));
 631         if (fid_oid(&d->opd_last_used_fid) < 2) {
 632                 /* lastfid looks strange... ask OST */
 633                 rc = osp_get_lastfid_from_ost(env, d);
 634                 if (rc)
 635                         GOTO(out, rc);
 636         }
 637
 638         imp = d->opd_obd->u.cli.cl_import;
 639         LASSERT(imp);
 640
 641         req = ptlrpc_request_alloc(imp, &RQF_OST_CREATE);
 642         if (req == NULL)
 643                 GOTO(out, rc = -ENOMEM);
 644
 645         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
 646         if (rc) {
 647                 ptlrpc_request_free(req);
 648                 req = NULL;
 649                 GOTO(out, rc);
 650         }
 651
 652         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 653         if (body == NULL)
 654                 GOTO(out, rc = -EPROTO);
 655
 656         body->oa.o_flags = OBD_FL_DELORPHAN;
 657         body->oa.o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
 658
 659         fid_to_ostid(&d->opd_last_used_fid, &body->oa.o_oi);
 660
 661         ptlrpc_request_set_replen(req);
 662
 663         /* Don't resend the delorphan req */
 664         req->rq_no_resend = req->rq_no_delay = 1;
 665
 666         rc = ptlrpc_queue_wait(req);
 667         if (rc) {
 668                 update_status = 1;
 669                 GOTO(out, rc);
 670         }
 671
 672         body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 673         if (body == NULL)
 674                 GOTO(out, rc = -EPROTO);
 675
 676         /*
 677          * OST provides us with id new pool starts from in body->oa.o_id
 678          */
 679         ostid_to_fid(last_fid, &body->oa.o_oi, d->opd_index);
 680
 681         spin_lock(&d->opd_pre_lock);
 682         diff = osp_fid_diff(&d->opd_last_used_fid, last_fid);
 683         if (diff > 0) {
 684                 d->opd_pre_grow_count = OST_MIN_PRECREATE + diff;
 685                 d->opd_pre_last_created_fid = d->opd_last_used_fid;
 686         } else {
 687                 d->opd_pre_grow_count = OST_MIN_PRECREATE;
 688                 d->opd_pre_last_created_fid = *last_fid;
 689         }
 690         /*
 691          * This empties the pre-creation pool and effectively blocks any new
 692          * reservations.
 693          */
 694         LASSERT(fid_oid(&d->opd_pre_last_created_fid) <=
 695                 LUSTRE_DATA_SEQ_MAX_WIDTH);
 696         d->opd_pre_used_fid = d->opd_pre_last_created_fid;
 697         d->opd_pre_grow_slow = 0;
 698         spin_unlock(&d->opd_pre_lock);
 699
 700         CDEBUG(D_HA, "%s: Got last_id "DFID" from OST, last_created "DFID
 701                "last_used is "DFID"\n", d->opd_obd->obd_name, PFID(last_fid),
 702                PFID(&d->opd_pre_last_created_fid), PFID(&d->opd_last_used_fid));
 703 out:
 704         if (req)
 705                 ptlrpc_req_finished(req);
 706
 707         spin_lock(&d->opd_pre_lock);
 708         d->opd_pre_recovering = 0;
 709         spin_unlock(&d->opd_pre_lock);
 710
 711         /*
 712          * If rc is zero, the pre-creation window should have been emptied.
 713          * Since waking up the herd would be useless without pre-created
 714          * objects, we defer the signal to osp_precreate_send() in that case.
 715          */
 716         if (rc != 0) {
 717                 if (update_status) {
 718                         CERROR("%s: cannot cleanup orphans: rc = %d\n",
 719                                d->opd_obd->obd_name, rc);
 720                         /* we can't proceed from here, OST seem to
 721                          * be in a bad shape, better to wait for
 722                          * a new instance of the server and repeat
 723                          * from the beginning. notify possible waiters
 724                          * this OSP isn't quite functional yet */
 725                         osp_pre_update_status(d, rc);
 726                 } else {
 727                         wake_up(&d->opd_pre_user_waitq);
 728                 }
 729         }
 730
 731         RETURN(rc);
 732 }
 733
 734 /*
 735  * the function updates current precreation status used: functional or not
 736  *
 737  * rc is a last code from the transport, rc == 0 meaning transport works
 738  * well and users of lod can use objects from this OSP
 739  *
 740  * the status depends on current usage of OST
 741  */
 742 void osp_pre_update_status(struct osp_device *d, int rc)
 743 {
 744         struct obd_statfs       *msfs = &d->opd_statfs;
 745         int                      old = d->opd_pre_status;
 746         __u64                    used;
 747
 748         d->opd_pre_status = rc;
 749         if (rc)
 750                 goto out;
 751
 752         /* Add a bit of hysteresis so this flag isn't continually flapping,
 753          * and ensure that new files don't get extremely fragmented due to
 754          * only a small amount of available space in the filesystem.
 755          * We want to set the NOSPC flag when there is less than ~0.1% free
 756          * and clear it when there is at least ~0.2% free space, so:
 757          *                   avail < ~0.1% max          max = avail + used
 758          *            1025 * avail < avail + used       used = blocks - free
 759          *            1024 * avail < used
 760          *            1024 * avail < blocks - free
 761          *                   avail < ((blocks - free) >> 10)
 762          *
 763          * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
 764          * lose that amount of space so in those cases we report no space left
 765          * if their is less than 1 GB left.                             */
 766         if (likely(msfs->os_type)) {
 767                 used = min_t(__u64, (msfs->os_blocks - msfs->os_bfree) >> 10,
 768                                     1 << 30);
 769                 if ((msfs->os_ffree < 32) || (msfs->os_bavail < used)) {
 770                         d->opd_pre_status = -ENOSPC;
 771                         if (old != -ENOSPC)
 772                                 CDEBUG(D_INFO, "%s: status: "LPU64" blocks, "
 773                                        LPU64" free, "LPU64" used, "LPU64" "
 774                                        "avail -> %d: rc = %d\n",
 775                                        d->opd_obd->obd_name, msfs->os_blocks,
 776                                        msfs->os_bfree, used, msfs->os_bavail,
 777                                        d->opd_pre_status, rc);
 778                         CDEBUG(D_INFO,
 779                                "non-commited changes: %lu, in progress: %u\n",
 780                                d->opd_syn_changes, d->opd_syn_rpc_in_progress);
 781                 } else if (old == -ENOSPC) {
 782                         d->opd_pre_status = 0;
 783                         spin_lock(&d->opd_pre_lock);
 784                         d->opd_pre_grow_slow = 0;
 785                         d->opd_pre_grow_count = OST_MIN_PRECREATE;
 786                         spin_unlock(&d->opd_pre_lock);
 787                         wake_up(&d->opd_pre_waitq);
 788                         CDEBUG(D_INFO, "%s: no space: "LPU64" blocks, "LPU64
 789                                " free, "LPU64" used, "LPU64" avail -> %d: "
 790                                "rc = %d\n", d->opd_obd->obd_name,
 791                                msfs->os_blocks, msfs->os_bfree, used,
 792                                msfs->os_bavail, d->opd_pre_status, rc);
 793                 }
 794         }
 795
 796 out:
 797         wake_up(&d->opd_pre_user_waitq);
 798 }
 799
 800 int osp_init_pre_fid(struct osp_device *osp)
 801 {
 802         struct lu_env           env;
 803         struct osp_thread_info  *osi;
 804         struct lu_client_seq    *cli_seq;
 805         struct lu_fid           *last_fid;
 806         int                     rc;
 807         ENTRY;
 808
 809         LASSERT(osp->opd_pre != NULL);
 810
 811         /* Return if last_used fid has been initialized */
 812         if (!fid_is_zero(&osp->opd_last_used_fid))
 813                 RETURN(0);
 814
 815         rc = lu_env_init(&env, osp->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
 816         if (rc) {
 817                 CERROR("%s: init env error: rc = %d\n",
 818                        osp->opd_obd->obd_name, rc);
 819                 RETURN(rc);
 820         }
 821
 822         osi = osp_env_info(&env);
 823         last_fid = &osi->osi_fid;
 824         fid_zero(last_fid);
 825         /* For a freshed fs, it will allocate a new sequence first */
 826         if (osp_is_fid_client(osp) && osp->opd_group != 0) {
 827                 cli_seq = osp->opd_obd->u.cli.cl_seq;
 828                 rc = seq_client_get_seq(&env, cli_seq, &last_fid->f_seq);
 829                 if (rc != 0) {
 830                         CERROR("%s: alloc fid error: rc = %d\n",
 831                                osp->opd_obd->obd_name, rc);
 832                         GOTO(out, rc);
 833                 }
 834         } else {
 835                 last_fid->f_seq = fid_idif_seq(0, osp->opd_index);
 836         }
 837         last_fid->f_oid = 1;
 838         last_fid->f_ver = 0;
 839
 840         spin_lock(&osp->opd_pre_lock);
 841         osp->opd_last_used_fid = *last_fid;
 842         osp->opd_pre_used_fid = *last_fid;
 843         osp->opd_pre_last_created_fid = *last_fid;
 844         spin_unlock(&osp->opd_pre_lock);
 845         rc = osp_write_last_oid_seq_files(&env, osp, last_fid, 1);
 846         if (rc != 0) {
 847                 CERROR("%s: write fid error: rc = %d\n",
 848                        osp->opd_obd->obd_name, rc);
 849                 GOTO(out, rc);
 850         }
 851 out:
 852         lu_env_fini(&env);
 853         RETURN(rc);
 854 }
 855
 856 static int osp_precreate_thread(void *_arg)
 857 {
 858         struct osp_device       *d = _arg;
 859         struct ptlrpc_thread    *thread = &d->opd_pre_thread;
 860         struct l_wait_info       lwi = { 0 };
 861         struct lu_env            env;
 862         int                      rc;
 863
 864         ENTRY;
 865
 866         rc = lu_env_init(&env, d->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
 867         if (rc) {
 868                 CERROR("%s: init env error: rc = %d\n", d->opd_obd->obd_name,
 869                        rc);
 870                 RETURN(rc);
 871         }
 872
 873         spin_lock(&d->opd_pre_lock);
 874         thread->t_flags = SVC_RUNNING;
 875         spin_unlock(&d->opd_pre_lock);
 876         wake_up(&thread->t_ctl_waitq);
 877
 878         while (osp_precreate_running(d)) {
 879                 /*
 880                  * need to be connected to OST
 881                  */
 882                 while (osp_precreate_running(d)) {
 883                         l_wait_event(d->opd_pre_waitq,
 884                                      !osp_precreate_running(d) ||
 885                                      d->opd_new_connection,
 886                                      &lwi);
 887
 888                         if (!d->opd_new_connection)
 889                                 continue;
 890
 891                         d->opd_new_connection = 0;
 892                         d->opd_got_disconnected = 0;
 893                         break;
 894                 }
 895
 896                 if (!osp_precreate_running(d))
 897                         break;
 898
 899                 LASSERT(d->opd_obd->u.cli.cl_seq != NULL);
 900                 /* Sigh, fid client is not ready yet */
 901                 if (d->opd_obd->u.cli.cl_seq->lcs_exp == NULL)
 902                         continue;
 903
 904                 /* Init fid for osp_precreate if necessary */
 905                 rc = osp_init_pre_fid(d);
 906                 if (rc != 0) {
 907                         class_export_put(d->opd_exp);
 908                         d->opd_obd->u.cli.cl_seq->lcs_exp = NULL;
 909                         CERROR("%s: init pre fid error: rc = %d\n",
 910                                d->opd_obd->obd_name, rc);
 911                         continue;
 912                 }
 913
 914                 osp_statfs_update(d);
 915
 916                 /*
 917                  * Clean up orphans or recreate missing objects.
 918                  */
 919                 rc = osp_precreate_cleanup_orphans(&env, d);
 920                 if (rc != 0)
 921                         continue;
 922                 /*
 923                  * connected, can handle precreates now
 924                  */
 925                 while (osp_precreate_running(d)) {
 926                         l_wait_event(d->opd_pre_waitq,
 927                                      !osp_precreate_running(d) ||
 928                                      osp_precreate_near_empty(&env, d) ||
 929                                      osp_statfs_need_update(d) ||
 930                                      d->opd_got_disconnected, &lwi);
 931
 932                         if (!osp_precreate_running(d))
 933                                 break;
 934
 935                         /* something happened to the connection
 936                          * have to start from the beginning */
 937                         if (d->opd_got_disconnected)
 938                                 break;
 939
 940                         if (osp_statfs_need_update(d))
 941                                 osp_statfs_update(d);
 942
 943                         /* To avoid handling different seq in precreate/orphan
 944                          * cleanup, it will hold precreate until current seq is
 945                          * used up. */
 946                         if (unlikely(osp_precreate_end_seq(&env, d) &&
 947                             !osp_create_end_seq(&env, d)))
 948                                 continue;
 949
 950                         if (unlikely(osp_precreate_end_seq(&env, d) &&
 951                                      osp_create_end_seq(&env, d))) {
 952                                 LCONSOLE_INFO("%s:"LPX64" is used up."
 953                                               " Update to new seq\n",
 954                                               d->opd_obd->obd_name,
 955                                          fid_seq(&d->opd_pre_last_created_fid));
 956                                 rc = osp_precreate_rollover_new_seq(&env, d);
 957                                 if (rc)
 958                                         continue;
 959                         }
 960
 961                         if (osp_precreate_near_empty(&env, d)) {
 962                                 rc = osp_precreate_send(&env, d);
 963                                 /* osp_precreate_send() sets opd_pre_status
 964                                  * in case of error, that prevent the using of
 965                                  * failed device. */
 966                                 if (rc < 0 && rc != -ENOSPC &&
 967                                     rc != -ETIMEDOUT && rc != -ENOTCONN)
 968                                         CERROR("%s: cannot precreate objects:"
 969                                                " rc = %d\n",
 970                                                d->opd_obd->obd_name, rc);
 971                         }
 972                 }
 973         }
 974
 975         thread->t_flags = SVC_STOPPED;
 976         lu_env_fini(&env);
 977         wake_up(&thread->t_ctl_waitq);
 978
 979         RETURN(0);
 980 }
 981
 982 static int osp_precreate_ready_condition(const struct lu_env *env,
 983                                          struct osp_device *d)
 984 {
 985         if (d->opd_pre_recovering)
 986                 return 0;
 987
 988         /* ready if got enough precreated objects */
 989         /* we need to wait for others (opd_pre_reserved) and our object (+1) */
 990         if (d->opd_pre_reserved + 1 < osp_objs_precreated(env, d))
 991                 return 1;
 992
 993         /* ready if OST reported no space and no destroys in progress */
 994         if (d->opd_syn_changes + d->opd_syn_rpc_in_progress == 0 &&
 995             d->opd_pre_status == -ENOSPC)
 996                 return 1;
 997
 998         /* Bail out I/O fails to OST */
 999         if (d->opd_pre_status != 0 &&
1000             d->opd_pre_status != -EAGAIN &&
1001             d->opd_pre_status != -ENODEV &&
1002             d->opd_pre_status != -ENOSPC) {
1003                 /* DEBUG LU-3230 */
1004                 if (d->opd_pre_status != -EIO)
1005                         CERROR("%s: precreate failed opd_pre_status %d\n",
1006                                d->opd_obd->obd_name, d->opd_pre_status);
1007                 return 1;
1008         }
1009
1010         return 0;
1011 }
1012
1013 static int osp_precreate_timeout_condition(void *data)
1014 {
1015         struct osp_device *d = data;
1016
1017         LCONSOLE_WARN("%s: slow creates, last="DFID", next="DFID", "
1018                       "reserved="LPU64", syn_changes=%lu, "
1019                       "syn_rpc_in_progress=%d, status=%d\n",
1020                       d->opd_obd->obd_name, PFID(&d->opd_pre_last_created_fid),
1021                       PFID(&d->opd_pre_used_fid), d->opd_pre_reserved,
1022                       d->opd_syn_changes, d->opd_syn_rpc_in_progress,
1023                       d->opd_pre_status);
1024
1025         return 1;
1026 }
1027
1028 /*
1029  * called to reserve object in the pool
1030  * return codes:
1031  *  ENOSPC - no space on corresponded OST
1032  *  EAGAIN - precreation is in progress, try later
1033  *  EIO    - no access to OST
1034  */
1035 int osp_precreate_reserve(const struct lu_env *env, struct osp_device *d)
1036 {
1037         struct l_wait_info       lwi;
1038         cfs_time_t               expire = cfs_time_shift(obd_timeout);
1039         int                      precreated, rc;
1040
1041         ENTRY;
1042
1043         LASSERTF(osp_objs_precreated(env, d) >= 0, "Last created FID "DFID
1044                  "Next FID "DFID"\n", PFID(&d->opd_pre_last_created_fid),
1045                  PFID(&d->opd_pre_used_fid));
1046
1047         /*
1048          * wait till:
1049          *  - preallocation is done
1050          *  - no free space expected soon
1051          *  - can't connect to OST for too long (obd_timeout)
1052          *  - OST can allocate fid sequence.
1053          */
1054         while ((rc = d->opd_pre_status) == 0 || rc == -ENOSPC ||
1055                 rc == -ENODEV || rc == -EAGAIN || rc == -ENOTCONN) {
1056
1057                 /*
1058                  * increase number of precreations
1059                  */
1060                 precreated = osp_objs_precreated(env, d);
1061                 if (d->opd_pre_grow_count < d->opd_pre_max_grow_count &&
1062                     d->opd_pre_grow_slow == 0 &&
1063                     precreated <= (d->opd_pre_grow_count / 4 + 1)) {
1064                         spin_lock(&d->opd_pre_lock);
1065                         d->opd_pre_grow_slow = 1;
1066                         d->opd_pre_grow_count *= 2;
1067                         spin_unlock(&d->opd_pre_lock);
1068                 }
1069
1070                 spin_lock(&d->opd_pre_lock);
1071                 precreated = osp_objs_precreated(env, d);
1072                 if (precreated > d->opd_pre_reserved &&
1073                     !d->opd_pre_recovering) {
1074                         d->opd_pre_reserved++;
1075                         spin_unlock(&d->opd_pre_lock);
1076                         rc = 0;
1077
1078                         /* XXX: don't wake up if precreation is in progress */
1079                         if (osp_precreate_near_empty_nolock(env, d) &&
1080                            !osp_precreate_end_seq_nolock(env, d))
1081                                 wake_up(&d->opd_pre_waitq);
1082
1083                         break;
1084                 }
1085                 spin_unlock(&d->opd_pre_lock);
1086
1087                 /*
1088                  * all precreated objects have been used and no-space
1089                  * status leave us no chance to succeed very soon
1090                  * but if there is destroy in progress, then we should
1091                  * wait till that is done - some space might be released
1092                  */
1093                 if (unlikely(rc == -ENOSPC)) {
1094                         if (d->opd_syn_changes) {
1095                                 /* force local commit to release space */
1096                                 dt_commit_async(env, d->opd_storage);
1097                         }
1098                         if (d->opd_syn_rpc_in_progress) {
1099                                 /* just wait till destroys are done */
1100                                 /* see l_wait_even() few lines below */
1101                         }
1102                         if (d->opd_syn_changes +
1103                             d->opd_syn_rpc_in_progress == 0) {
1104                                 /* no hope for free space */
1105                                 break;
1106                         }
1107                 }
1108
1109                 /* XXX: don't wake up if precreation is in progress */
1110                 wake_up(&d->opd_pre_waitq);
1111
1112                 lwi = LWI_TIMEOUT(expire - cfs_time_current(),
1113                                 osp_precreate_timeout_condition, d);
1114                 if (cfs_time_aftereq(cfs_time_current(), expire)) {
1115                         rc = -ETIMEDOUT;
1116                         break;
1117                 }
1118
1119                 l_wait_event(d->opd_pre_user_waitq,
1120                              osp_precreate_ready_condition(env, d), &lwi);
1121         }
1122
1123         RETURN(rc);
1124 }
1125
1126 /*
1127  * this function relies on reservation made before
1128  */
1129 int osp_precreate_get_fid(const struct lu_env *env, struct osp_device *d,
1130                           struct lu_fid *fid)
1131 {
1132         /* grab next id from the pool */
1133         spin_lock(&d->opd_pre_lock);
1134
1135         LASSERTF(osp_fid_diff(&d->opd_pre_used_fid,
1136                              &d->opd_pre_last_created_fid) < 0,
1137                  "next fid "DFID" last created fid "DFID"\n",
1138                  PFID(&d->opd_pre_used_fid),
1139                  PFID(&d->opd_pre_last_created_fid));
1140
1141         d->opd_pre_used_fid.f_oid++;
1142         memcpy(fid, &d->opd_pre_used_fid, sizeof(*fid));
1143         d->opd_pre_reserved--;
1144         /*
1145          * last_used_id must be changed along with getting new id otherwise
1146          * we might miscalculate gap causing object loss or leak
1147          */
1148         osp_update_last_fid(d, fid);
1149         spin_unlock(&d->opd_pre_lock);
1150
1151         /*
1152          * probably main thread suspended orphan cleanup till
1153          * all reservations are released, see comment in
1154          * osp_precreate_thread() just before orphan cleanup
1155          */
1156         if (unlikely(d->opd_pre_reserved == 0 && d->opd_pre_status))
1157                 wake_up(&d->opd_pre_waitq);
1158
1159         return 0;
1160 }
1161
1162 /*
1163  *
1164  */
1165 int osp_object_truncate(const struct lu_env *env, struct dt_object *dt,
1166                         __u64 size)
1167 {
1168         struct osp_device       *d = lu2osp_dev(dt->do_lu.lo_dev);
1169         struct ptlrpc_request   *req = NULL;
1170         struct obd_import       *imp;
1171         struct ost_body         *body;
1172         struct obdo             *oa = NULL;
1173         int                      rc;
1174
1175         ENTRY;
1176
1177         imp = d->opd_obd->u.cli.cl_import;
1178         LASSERT(imp);
1179
1180         req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
1181         if (req == NULL)
1182                 RETURN(-ENOMEM);
1183
1184         /* XXX: capa support? */
1185         /* osc_set_capa_size(req, &RMF_CAPA1, capa); */
1186         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
1187         if (rc) {
1188                 ptlrpc_request_free(req);
1189                 RETURN(rc);
1190         }
1191
1192         /*
1193          * XXX: decide how do we do here with resend
1194          * if we don't resend, then client may see wrong file size
1195          * if we do resend, then MDS thread can get stuck for quite long
1196          */
1197         req->rq_no_resend = req->rq_no_delay = 1;
1198
1199         req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1200         ptlrpc_at_set_req_timeout(req);
1201
1202         OBD_ALLOC_PTR(oa);
1203         if (oa == NULL)
1204                 GOTO(out, rc = -ENOMEM);
1205
1206         rc = fid_to_ostid(lu_object_fid(&dt->do_lu), &oa->o_oi);
1207         LASSERT(rc == 0);
1208         oa->o_size = size;
1209         oa->o_blocks = OBD_OBJECT_EOF;
1210         oa->o_valid = OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1211                       OBD_MD_FLID | OBD_MD_FLGROUP;
1212
1213         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1214         LASSERT(body);
1215         lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1216
1217         /* XXX: capa support? */
1218         /* osc_pack_capa(req, body, capa); */
1219
1220         ptlrpc_request_set_replen(req);
1221
1222         rc = ptlrpc_queue_wait(req);
1223         if (rc)
1224                 CERROR("can't punch object: %d\n", rc);
1225 out:
1226         ptlrpc_req_finished(req);
1227         if (oa)
1228                 OBD_FREE_PTR(oa);
1229         RETURN(rc);
1230 }
1231
1232 int osp_init_precreate(struct osp_device *d)
1233 {
1234         struct l_wait_info       lwi = { 0 };
1235         struct task_struct              *task;
1236
1237         ENTRY;
1238
1239         OBD_ALLOC_PTR(d->opd_pre);
1240         if (d->opd_pre == NULL)
1241                 RETURN(-ENOMEM);
1242
1243         /* initially precreation isn't ready */
1244         d->opd_pre_status = -EAGAIN;
1245         fid_zero(&d->opd_pre_used_fid);
1246         d->opd_pre_used_fid.f_oid = 1;
1247         fid_zero(&d->opd_pre_last_created_fid);
1248         d->opd_pre_last_created_fid.f_oid = 1;
1249         d->opd_pre_reserved = 0;
1250         d->opd_got_disconnected = 1;
1251         d->opd_pre_grow_slow = 0;
1252         d->opd_pre_grow_count = OST_MIN_PRECREATE;
1253         d->opd_pre_min_grow_count = OST_MIN_PRECREATE;
1254         d->opd_pre_max_grow_count = OST_MAX_PRECREATE;
1255
1256         spin_lock_init(&d->opd_pre_lock);
1257         init_waitqueue_head(&d->opd_pre_waitq);
1258         init_waitqueue_head(&d->opd_pre_user_waitq);
1259         init_waitqueue_head(&d->opd_pre_thread.t_ctl_waitq);
1260
1261         /*
1262          * Initialize statfs-related things
1263          */
1264         d->opd_statfs_maxage = 5; /* default update interval */
1265         d->opd_statfs_fresh_till = cfs_time_shift(-1000);
1266         CDEBUG(D_OTHER, "current %llu, fresh till %llu\n",
1267                (unsigned long long)cfs_time_current(),
1268                (unsigned long long)d->opd_statfs_fresh_till);
1269         cfs_timer_init(&d->opd_statfs_timer, osp_statfs_timer_cb, d);
1270
1271         /*
1272          * start thread handling precreation and statfs updates
1273          */
1274         task = kthread_run(osp_precreate_thread, d,
1275                            "osp-pre-%u-%u", d->opd_index, d->opd_group);
1276         if (IS_ERR(task)) {
1277                 CERROR("can't start precreate thread %ld\n", PTR_ERR(task));
1278                 RETURN(PTR_ERR(task));
1279         }
1280
1281         l_wait_event(d->opd_pre_thread.t_ctl_waitq,
1282                      osp_precreate_running(d) || osp_precreate_stopped(d),
1283                      &lwi);
1284
1285         RETURN(0);
1286 }
1287
1288 void osp_precreate_fini(struct osp_device *d)
1289 {
1290         struct ptlrpc_thread *thread;
1291
1292         ENTRY;
1293
1294         cfs_timer_disarm(&d->opd_statfs_timer);
1295
1296         if (d->opd_pre == NULL)
1297                 RETURN_EXIT;
1298
1299         thread = &d->opd_pre_thread;
1300
1301         thread->t_flags = SVC_STOPPING;
1302         wake_up(&d->opd_pre_waitq);
1303
1304         wait_event(thread->t_ctl_waitq, thread->t_flags & SVC_STOPPED);
1305
1306         OBD_FREE_PTR(d->opd_pre);
1307         d->opd_pre = NULL;
1308
1309         EXIT;
1310 }
1311