4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/osp/osp_sync.c
34 * Lustre OST Proxy Device
36 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
37 * Author: Mikhail Pershin <mike.pershin@intel.com>
38 * Author: Di Wang <di.wang@intel.com>
41 #define DEBUG_SUBSYSTEM S_MDS
43 #include <linux/kthread.h>
45 #include <lustre_obdo.h>
47 #include "osp_internal.h"
50 * there are two specific states to take care about:
52 * = import is disconnected =
54 * = import is inactive =
55 * in this case osp_declare_object_create() returns an error
61 * Check whether statfs data is expired
63 * OSP device caches statfs data for the target, the function checks
64 * whether the data is expired or not.
66 * \param[in] d OSP device
68 * \retval 0 - not expired, 1 - expired
70 static inline int osp_statfs_need_update(struct osp_device *d)
72 return !cfs_time_before(cfs_time_current(),
73 d->opd_statfs_fresh_till);
77 * OSP tries to maintain pool of available objects so that calls to create
78 * objects don't block most of time
80 * each time OSP gets connected to OST, we should start from precreation cleanup
82 static inline bool osp_precreate_running(struct osp_device *d)
84 return !!(d->opd_pre_thread.t_flags & SVC_RUNNING);
87 static inline bool osp_precreate_stopped(struct osp_device *d)
89 return !!(d->opd_pre_thread.t_flags & SVC_STOPPED);
92 static void osp_statfs_timer_cb(unsigned long _d)
94 struct osp_device *d = (struct osp_device *) _d;
97 if (d->opd_pre != NULL && osp_precreate_running(d))
98 wake_up(&d->opd_pre_waitq);
102 * RPC interpret callback for OST_STATFS RPC
104 * An interpretation callback called by ptlrpc for OST_STATFS RPC when it is
105 * replied by the target. It's used to maintain statfs cache for the target.
106 * The function fills data from the reply if successful and schedules another
109 * \param[in] env LU environment provided by the caller
110 * \param[in] req RPC replied
111 * \param[in] aa callback data
112 * \param[in] rc RPC result
114 * \retval 0 on success
115 * \retval negative negated errno on error
117 static int osp_statfs_interpret(const struct lu_env *env,
118 struct ptlrpc_request *req,
119 union ptlrpc_async_args *aa, int rc)
121 struct obd_import *imp = req->rq_import;
122 struct obd_statfs *msfs;
123 struct osp_device *d;
127 aa = ptlrpc_req_async_args(req);
128 d = aa->pointer_arg[0];
134 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
136 GOTO(out, rc = -EPROTO);
138 d->opd_statfs = *msfs;
140 osp_pre_update_status(d, rc);
142 /* schedule next update */
143 d->opd_statfs_fresh_till = cfs_time_shift(d->opd_statfs_maxage);
144 mod_timer(&d->opd_statfs_timer, d->opd_statfs_fresh_till);
145 d->opd_statfs_update_in_progress = 0;
147 CDEBUG(D_CACHE, "updated statfs %p\n", d);
151 /* couldn't update statfs, try again as soon as possible */
152 if (d->opd_pre != NULL && osp_precreate_running(d))
153 wake_up(&d->opd_pre_waitq);
155 if (req->rq_import_generation == imp->imp_generation)
156 CDEBUG(D_CACHE, "%s: couldn't update statfs: rc = %d\n",
157 d->opd_obd->obd_name, rc);
162 * Send OST_STATFS RPC
164 * Sends OST_STATFS RPC to refresh cached statfs data for the target.
165 * Also disables scheduled updates as times OSP may need to refresh
166 * statfs data before expiration. The function doesn't block, instead
167 * an interpretation callback osp_statfs_interpret() is used.
169 * \param[in] d OSP device
171 static int osp_statfs_update(struct osp_device *d)
173 struct ptlrpc_request *req;
174 struct obd_import *imp;
175 union ptlrpc_async_args *aa;
180 CDEBUG(D_CACHE, "going to update statfs\n");
182 imp = d->opd_obd->u.cli.cl_import;
185 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
189 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
191 ptlrpc_request_free(req);
194 ptlrpc_request_set_replen(req);
195 req->rq_request_portal = OST_CREATE_PORTAL;
196 ptlrpc_at_set_req_timeout(req);
198 req->rq_interpret_reply = (ptlrpc_interpterer_t)osp_statfs_interpret;
199 aa = ptlrpc_req_async_args(req);
200 aa->pointer_arg[0] = d;
203 * no updates till reply
205 del_timer(&d->opd_statfs_timer);
206 d->opd_statfs_fresh_till = cfs_time_shift(obd_timeout * 1000);
207 d->opd_statfs_update_in_progress = 1;
209 ptlrpcd_add_req(req);
215 * Schedule an immediate update for statfs data
217 * If cached statfs data claim no free space, but OSP has got a request to
218 * destroy an object (so release some space probably), then we may need to
219 * refresh cached statfs data sooner than planned. The function checks there
220 * is no statfs update going and schedules immediate update if so.
221 * XXX: there might be a case where removed object(s) do not add free space (empty
222 * object). If the number of such deletions is high, then we can start to update
223 * statfs too often causing a RPC storm. some throttling is needed...
225 * \param[in] d OSP device where statfs data needs to be refreshed
227 void osp_statfs_need_now(struct osp_device *d)
229 if (!d->opd_statfs_update_in_progress) {
231 * if current status is -ENOSPC (lack of free space on OST)
232 * then we should poll OST immediately once object destroy
235 d->opd_statfs_fresh_till = cfs_time_shift(-1);
236 del_timer(&d->opd_statfs_timer);
237 wake_up(&d->opd_pre_waitq);
242 * Return number of precreated objects
244 * A simple helper to calculate the number of precreated objects on the device.
246 * \param[in] env LU environment provided by the caller
247 * \param[in] osp OSP device
249 * \retval the number of the precreated objects
251 static inline int osp_objs_precreated(const struct lu_env *env,
252 struct osp_device *osp)
254 return osp_fid_diff(&osp->opd_pre_last_created_fid,
255 &osp->opd_pre_used_fid);
259 * Check pool of precreated objects is nearly empty
261 * We should not wait till the pool of the precreated objects is exhausted,
262 * because then there will be a long period of OSP being unavailable for the
263 * new creations due to lenghty precreate RPC. Instead we ask for another
264 * precreation ahead and hopefully have it ready before the current pool is
265 * empty. Notice this function relies on an external locking.
267 * \param[in] env LU environment provided by the caller
268 * \param[in] d OSP device
270 * \retval 0 - current pool is good enough, 1 - time to precreate
272 static inline int osp_precreate_near_empty_nolock(const struct lu_env *env,
273 struct osp_device *d)
275 int window = osp_objs_precreated(env, d);
277 /* don't consider new precreation till OST is healty and
279 return ((window - d->opd_pre_reserved < d->opd_pre_create_count / 2) &&
280 (d->opd_pre_status == 0));
284 * Check pool of precreated objects
286 * This is protected version of osp_precreate_near_empty_nolock(), check that
289 * \param[in] env LU environment provided by the caller
290 * \param[in] d OSP device
292 * \retval 0 - current pool is good enough, 1 - time to precreate
294 static inline int osp_precreate_near_empty(const struct lu_env *env,
295 struct osp_device *d)
299 /* XXX: do we really need locking here? */
300 spin_lock(&d->opd_pre_lock);
301 rc = osp_precreate_near_empty_nolock(env, d);
302 spin_unlock(&d->opd_pre_lock);
307 * Check given sequence is empty
309 * Returns a binary result whether the given sequence has some IDs left
310 * or not. Find the details in osp_fid_end_seq(). This is a lock protected
311 * version of that function.
313 * \param[in] env LU environment provided by the caller
314 * \param[in] osp OSP device
316 * \retval 0 - current sequence has no IDs, 1 - otherwise
318 static inline int osp_create_end_seq(const struct lu_env *env,
319 struct osp_device *osp)
321 struct lu_fid *fid = &osp->opd_pre_used_fid;
324 spin_lock(&osp->opd_pre_lock);
325 rc = osp_fid_end_seq(env, fid);
326 spin_unlock(&osp->opd_pre_lock);
331 * Write FID into into last_oid/last_seq file
333 * The function stores the sequence and the in-sequence id into two dedicated
334 * files. The sync argument can be used to request synchronous commit, so the
335 * function won't return until the updates are committed.
337 * \param[in] env LU environment provided by the caller
338 * \param[in] osp OSP device
339 * \param[in] fid fid where sequence/id is taken
340 * \param[in] sync update mode: 0 - asynchronously, 1 - synchronously
342 * \retval 0 on success
343 * \retval negative negated errno on error
345 int osp_write_last_oid_seq_files(struct lu_env *env, struct osp_device *osp,
346 struct lu_fid *fid, int sync)
348 struct osp_thread_info *oti = osp_env_info(env);
349 struct lu_buf *lb_oid = &oti->osi_lb;
350 struct lu_buf *lb_oseq = &oti->osi_lb2;
357 if (osp->opd_storage->dd_rdonly)
360 /* Note: through f_oid is only 32 bits, it will also write 64 bits
361 * for oid to keep compatibility with the previous version. */
362 lb_oid->lb_buf = &fid->f_oid;
363 lb_oid->lb_len = sizeof(u64);
364 oid_off = sizeof(u64) * osp->opd_index;
366 lb_oseq->lb_buf = &fid->f_seq;
367 lb_oseq->lb_len = sizeof(u64);
368 oseq_off = sizeof(u64) * osp->opd_index;
370 th = dt_trans_create(env, osp->opd_storage);
375 rc = dt_declare_record_write(env, osp->opd_last_used_oid_file,
376 lb_oid, oid_off, th);
380 rc = dt_declare_record_write(env, osp->opd_last_used_seq_file,
381 lb_oseq, oseq_off, th);
385 rc = dt_trans_start_local(env, osp->opd_storage, th);
389 rc = dt_record_write(env, osp->opd_last_used_oid_file, lb_oid,
392 CERROR("%s: can not write to last seq file: rc = %d\n",
393 osp->opd_obd->obd_name, rc);
396 rc = dt_record_write(env, osp->opd_last_used_seq_file, lb_oseq,
399 CERROR("%s: can not write to last seq file: rc = %d\n",
400 osp->opd_obd->obd_name, rc);
404 dt_trans_stop(env, osp->opd_storage, th);
409 * Switch to another sequence
411 * When a current sequence has no available IDs left, OSP has to switch to
412 * another new sequence. OSP requests it using the regular FLDB protocol
413 * and stores synchronously before that is used in precreated. This is needed
414 * to basically have the sequences referenced (not orphaned), otherwise it's
415 * possible that OST has some objects precreated and the clients have data
416 * written to it, but after MDT failover nobody refers those objects and OSP
417 * has no idea that the sequence need cleanup to be done.
418 * While this is very expensive operation, it's supposed to happen very very
419 * infrequently because sequence has 2^32 or 2^48 objects (depending on type)
421 * \param[in] env LU environment provided by the caller
422 * \param[in] osp OSP device
424 * \retval 0 on success
425 * \retval negative negated errno on error
427 static int osp_precreate_rollover_new_seq(struct lu_env *env,
428 struct osp_device *osp)
430 struct lu_fid *fid = &osp_env_info(env)->osi_fid;
431 struct lu_fid *last_fid = &osp->opd_last_used_fid;
435 rc = seq_client_get_seq(env, osp->opd_obd->u.cli.cl_seq, &fid->f_seq);
437 CERROR("%s: alloc fid error: rc = %d\n",
438 osp->opd_obd->obd_name, rc);
444 LASSERTF(fid_seq(fid) != fid_seq(last_fid),
445 "fid "DFID", last_fid "DFID"\n", PFID(fid),
448 rc = osp_write_last_oid_seq_files(env, osp, fid, 1);
450 CERROR("%s: Can not update oid/seq file: rc = %d\n",
451 osp->opd_obd->obd_name, rc);
455 LCONSOLE_INFO("%s: update sequence from %#llx to %#llx\n",
456 osp->opd_obd->obd_name, fid_seq(last_fid),
458 /* Update last_xxx to the new seq */
459 spin_lock(&osp->opd_pre_lock);
460 osp->opd_last_used_fid = *fid;
461 osp->opd_gap_start_fid = *fid;
462 osp->opd_pre_used_fid = *fid;
463 osp->opd_pre_last_created_fid = *fid;
464 spin_unlock(&osp->opd_pre_lock);
470 * Find IDs available in current sequence
472 * The function calculates the highest possible ID and the number of IDs
473 * available in the current sequence OSP is using. The number is limited
474 * artifically by the caller (grow param) and the number of IDs available
475 * in the sequence by nature. The function doesn't require an external
478 * \param[in] env LU environment provided by the caller
479 * \param[in] osp OSP device
480 * \param[in] fid FID the caller wants to start with
481 * \param[in] grow how many the caller wants
482 * \param[out] fid the highest calculated FID
483 * \param[out] grow the number of available IDs calculated
485 * \retval 0 on success, 1 - the sequence is empty
487 static int osp_precreate_fids(const struct lu_env *env, struct osp_device *osp,
488 struct lu_fid *fid, int *grow)
490 struct osp_thread_info *osi = osp_env_info(env);
494 if (fid_is_idif(fid)) {
495 struct lu_fid *last_fid;
496 struct ost_id *oi = &osi->osi_oi;
498 spin_lock(&osp->opd_pre_lock);
499 last_fid = &osp->opd_pre_last_created_fid;
500 fid_to_ostid(last_fid, oi);
501 end = min(ostid_id(oi) + *grow, IDIF_MAX_OID);
502 *grow = end - ostid_id(oi);
503 ostid_set_id(oi, ostid_id(oi) + *grow);
504 spin_unlock(&osp->opd_pre_lock);
509 ostid_to_fid(fid, oi, osp->opd_index);
513 spin_lock(&osp->opd_pre_lock);
514 *fid = osp->opd_pre_last_created_fid;
516 end = min((end + *grow), (__u64)LUSTRE_DATA_SEQ_MAX_WIDTH);
517 *grow = end - fid->f_oid;
518 fid->f_oid += end - fid->f_oid;
519 spin_unlock(&osp->opd_pre_lock);
521 CDEBUG(D_INFO, "Expect %d, actual %d ["DFID" -- "DFID"]\n",
522 *grow, i, PFID(fid), PFID(&osp->opd_pre_last_created_fid));
524 return *grow > 0 ? 0 : 1;
528 * Prepare and send precreate RPC
530 * The function finds how many objects should be precreated. Then allocates,
531 * prepares and schedules precreate RPC synchronously. Upon reply the function
532 * wake ups the threads waiting for the new objects on this target. If the
533 * target wasn't able to create all the objects requested, then the next
534 * precreate will be asking less objects (i.e. slow precreate down).
536 * \param[in] env LU environment provided by the caller
537 * \param[in] d OSP device
539 * \retval 0 on success
540 * \retval negative negated errno on error
542 static int osp_precreate_send(const struct lu_env *env, struct osp_device *d)
544 struct osp_thread_info *oti = osp_env_info(env);
545 struct ptlrpc_request *req;
546 struct obd_import *imp;
547 struct ost_body *body;
549 struct lu_fid *fid = &oti->osi_fid;
552 /* don't precreate new objects till OST healthy and has free space */
553 if (unlikely(d->opd_pre_status)) {
554 CDEBUG(D_INFO, "%s: don't send new precreate: rc = %d\n",
555 d->opd_obd->obd_name, d->opd_pre_status);
560 * if not connection/initialization is compeleted, ignore
562 imp = d->opd_obd->u.cli.cl_import;
565 req = ptlrpc_request_alloc(imp, &RQF_OST_CREATE);
568 req->rq_request_portal = OST_CREATE_PORTAL;
569 /* we should not resend create request - anyway we will have delorphan
570 * and kill these objects */
571 req->rq_no_delay = req->rq_no_resend = 1;
573 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
575 ptlrpc_request_free(req);
579 LASSERT(d->opd_pre->osp_pre_delorphan_sent != 0);
580 spin_lock(&d->opd_pre_lock);
581 if (d->opd_pre_create_count > d->opd_pre_max_create_count / 2)
582 d->opd_pre_create_count = d->opd_pre_max_create_count / 2;
583 grow = d->opd_pre_create_count;
584 spin_unlock(&d->opd_pre_lock);
586 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
589 *fid = d->opd_pre_last_created_fid;
590 rc = osp_precreate_fids(env, d, fid, &grow);
592 /* Current seq has been used up*/
593 if (!osp_is_fid_client(d)) {
594 osp_pre_update_status(d, -ENOSPC);
597 wake_up(&d->opd_pre_waitq);
601 if (!osp_is_fid_client(d)) {
602 /* Non-FID client will always send seq 0 because of
604 LASSERTF(fid_is_idif(fid), "Invalid fid "DFID"\n", PFID(fid));
608 fid_to_ostid(fid, &body->oa.o_oi);
609 body->oa.o_valid = OBD_MD_FLGROUP;
611 ptlrpc_request_set_replen(req);
613 if (OBD_FAIL_CHECK(OBD_FAIL_OSP_FAKE_PRECREATE))
616 rc = ptlrpc_queue_wait(req);
618 CERROR("%s: can't precreate: rc = %d\n", d->opd_obd->obd_name,
622 LASSERT(req->rq_transno == 0);
624 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
626 GOTO(out_req, rc = -EPROTO);
628 ostid_to_fid(fid, &body->oa.o_oi, d->opd_index);
631 if (osp_fid_diff(fid, &d->opd_pre_used_fid) <= 0) {
632 CERROR("%s: precreate fid "DFID" < local used fid "DFID
633 ": rc = %d\n", d->opd_obd->obd_name,
634 PFID(fid), PFID(&d->opd_pre_used_fid), -ESTALE);
635 GOTO(out_req, rc = -ESTALE);
638 diff = osp_fid_diff(fid, &d->opd_pre_last_created_fid);
640 spin_lock(&d->opd_pre_lock);
642 /* the OST has not managed to create all the
643 * objects we asked for */
644 d->opd_pre_create_count = max(diff, OST_MIN_PRECREATE);
645 d->opd_pre_create_slow = 1;
647 /* the OST is able to keep up with the work,
648 * we could consider increasing create_count
649 * next time if needed */
650 d->opd_pre_create_slow = 0;
653 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
654 fid_to_ostid(fid, &body->oa.o_oi);
656 d->opd_pre_last_created_fid = *fid;
657 spin_unlock(&d->opd_pre_lock);
659 CDEBUG(D_HA, "%s: current precreated pool: "DFID"-"DFID"\n",
660 d->opd_obd->obd_name, PFID(&d->opd_pre_used_fid),
661 PFID(&d->opd_pre_last_created_fid));
663 /* now we can wakeup all users awaiting for objects */
664 osp_pre_update_status(d, rc);
665 wake_up(&d->opd_pre_user_waitq);
667 ptlrpc_req_finished(req);
672 * Get last precreated object from target (OST)
674 * Sends synchronous RPC to the target (OST) to learn the last precreated
675 * object. This later is used to remove all unused objects (cleanup orphan
676 * procedure). Also, the next object after one we got will be used as a
677 * starting point for the new precreates.
679 * \param[in] env LU environment provided by the caller
680 * \param[in] d OSP device
682 * \retval 0 on success
683 * \retval negative negated errno on error
685 static int osp_get_lastfid_from_ost(const struct lu_env *env,
686 struct osp_device *d)
688 struct ptlrpc_request *req = NULL;
689 struct obd_import *imp;
690 struct lu_fid *last_fid;
695 imp = d->opd_obd->u.cli.cl_import;
698 req = ptlrpc_request_alloc(imp, &RQF_OST_GET_INFO_LAST_FID);
702 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY, RCL_CLIENT,
703 sizeof(KEY_LAST_FID));
705 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
707 ptlrpc_request_free(req);
711 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
712 memcpy(tmp, KEY_LAST_FID, sizeof(KEY_LAST_FID));
714 req->rq_no_delay = req->rq_no_resend = 1;
715 last_fid = req_capsule_client_get(&req->rq_pill, &RMF_FID);
716 fid_cpu_to_le(last_fid, &d->opd_last_used_fid);
718 ptlrpc_request_set_replen(req);
720 rc = ptlrpc_queue_wait(req);
722 /* bad-bad OST.. let sysadm sort this out */
723 if (rc == -ENOTSUPP) {
724 CERROR("%s: server does not support FID: rc = %d\n",
725 d->opd_obd->obd_name, -ENOTSUPP);
727 ptlrpc_set_import_active(imp, 0);
731 last_fid = req_capsule_server_get(&req->rq_pill, &RMF_FID);
732 if (last_fid == NULL) {
733 CERROR("%s: Got last_fid failed.\n", d->opd_obd->obd_name);
734 GOTO(out, rc = -EPROTO);
737 if (!fid_is_sane(last_fid)) {
738 CERROR("%s: Got insane last_fid "DFID"\n",
739 d->opd_obd->obd_name, PFID(last_fid));
740 GOTO(out, rc = -EPROTO);
743 /* Only update the last used fid, if the OST has objects for
744 * this sequence, i.e. fid_oid > 0 */
745 if (fid_oid(last_fid) > 0)
746 d->opd_last_used_fid = *last_fid;
748 CDEBUG(D_HA, "%s: Got last_fid "DFID"\n", d->opd_obd->obd_name,
752 ptlrpc_req_finished(req);
757 * Cleanup orphans on OST
759 * This function is called in a contex of a dedicated thread handling
760 * all the precreation suff. The function waits till local recovery
761 * is complete, then identify all the unreferenced objects (orphans)
762 * using the highest ID referenced by a local and the highest object
763 * precreated by the target. The found range is a subject to removal
764 * using specially flagged RPC. During this process OSP is marked
765 * unavailable for new objects.
767 * \param[in] env LU environment provided by the caller
768 * \param[in] d OSP device
770 * \retval 0 on success
771 * \retval negative negated errno on error
773 static int osp_precreate_cleanup_orphans(struct lu_env *env,
774 struct osp_device *d)
776 struct osp_thread_info *osi = osp_env_info(env);
777 struct lu_fid *last_fid = &osi->osi_fid;
778 struct ptlrpc_request *req = NULL;
779 struct obd_import *imp;
780 struct ost_body *body;
781 struct l_wait_info lwi = { 0 };
782 int update_status = 0;
790 * wait for local recovery to finish, so we can cleanup orphans.
791 * orphans are all objects since "last used" (assigned).
792 * consider reserved objects as created otherwise we can get into
793 * a livelock when one blocked thread holding a reservation can
794 * block recovery. see LU-8367 for the details. in some cases this
795 * can result in gaps (i.e. leaked objects), but we've got LFSCK...
797 * do not allow new reservations because they may end up getting
798 * orphans being cleaned up below. so we block new reservations.
800 spin_lock(&d->opd_pre_lock);
801 d->opd_pre_recovering = 1;
802 spin_unlock(&d->opd_pre_lock);
804 * The locking above makes sure the opd_pre_reserved check below will
805 * catch all osp_precreate_reserve() calls who find
806 * "!opd_pre_recovering".
808 l_wait_event(d->opd_pre_waitq, d->opd_recovery_completed ||
809 !osp_precreate_running(d) || d->opd_got_disconnected,
811 if (!osp_precreate_running(d) || d->opd_got_disconnected)
812 GOTO(out, rc = -EAGAIN);
814 *last_fid = d->opd_last_used_fid;
815 /* The OSP should already get the valid seq now */
816 LASSERT(!fid_is_zero(last_fid));
817 if (fid_oid(&d->opd_last_used_fid) < 2) {
818 /* lastfid looks strange... ask OST */
819 rc = osp_get_lastfid_from_ost(env, d);
824 imp = d->opd_obd->u.cli.cl_import;
827 req = ptlrpc_request_alloc(imp, &RQF_OST_CREATE);
829 GOTO(out, rc = -ENOMEM);
831 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
833 ptlrpc_request_free(req);
838 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
840 GOTO(out, rc = -EPROTO);
842 body->oa.o_flags = 0;
843 body->oa.o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
845 /* unless this is the very first DELORPHAN (when we really
846 * can destroy some orphans), just tell OST to recreate
847 * missing objects in our precreate pool */
848 spin_lock(&d->opd_pre_lock);
849 if (d->opd_pre->osp_pre_delorphan_sent) {
850 fid = d->opd_pre_last_created_fid;
852 fid = d->opd_last_used_fid;
853 body->oa.o_flags = OBD_FL_DELORPHAN;
855 spin_unlock(&d->opd_pre_lock);
856 fid_to_ostid(&fid, &body->oa.o_oi);
858 CDEBUG(D_HA, "%s: going to cleanup orphans since "DFID"\n",
859 d->opd_obd->obd_name, PFID(&fid));
861 ptlrpc_request_set_replen(req);
863 /* Don't resend the delorphan req */
864 req->rq_no_resend = req->rq_no_delay = 1;
866 rc = ptlrpc_queue_wait(req);
872 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
874 GOTO(out, rc = -EPROTO);
877 * OST provides us with id new pool starts from in body->oa.o_id
879 ostid_to_fid(last_fid, &body->oa.o_oi, d->opd_index);
881 spin_lock(&d->opd_pre_lock);
882 diff = osp_fid_diff(&fid, last_fid);
884 d->opd_pre_create_count = OST_MIN_PRECREATE + diff;
885 d->opd_pre_last_created_fid = *last_fid;
887 d->opd_pre_create_count = OST_MIN_PRECREATE;
888 d->opd_pre_last_created_fid = *last_fid;
891 * This empties the pre-creation pool and effectively blocks any new
894 LASSERT(fid_oid(&d->opd_pre_last_created_fid) <=
895 LUSTRE_DATA_SEQ_MAX_WIDTH);
896 if (d->opd_pre->osp_pre_delorphan_sent == 0)
897 d->opd_pre_used_fid = d->opd_pre_last_created_fid;
898 d->opd_pre_create_slow = 0;
899 spin_unlock(&d->opd_pre_lock);
900 d->opd_pre->osp_pre_delorphan_sent = 1;
902 CDEBUG(D_HA, "%s: Got last_id "DFID" from OST, last_created "DFID
903 "last_used is "DFID"\n", d->opd_obd->obd_name, PFID(last_fid),
904 PFID(&d->opd_pre_last_created_fid), PFID(&d->opd_last_used_fid));
907 ptlrpc_req_finished(req);
910 * If rc is zero, the pre-creation window should have been emptied.
911 * Since waking up the herd would be useless without pre-created
912 * objects, we defer the signal to osp_precreate_send() in that case.
916 CERROR("%s: cannot cleanup orphans: rc = %d\n",
917 d->opd_obd->obd_name, rc);
918 /* we can't proceed from here, OST seem to
919 * be in a bad shape, better to wait for
920 * a new instance of the server and repeat
921 * from the beginning. notify possible waiters
922 * this OSP isn't quite functional yet */
923 osp_pre_update_status(d, rc);
925 wake_up(&d->opd_pre_user_waitq);
928 spin_lock(&d->opd_pre_lock);
929 d->opd_pre_recovering = 0;
930 spin_unlock(&d->opd_pre_lock);
937 * Update precreate status using statfs data
939 * The function decides whether this OSP should be used for new objects.
940 * IOW, whether this OST is used up or has some free space. Cached statfs
941 * data is used to make this decision. If the latest result of statfs
942 * request (rc argument) is not success, then just mark OSP unavailable
945 * Add a bit of hysteresis so this flag isn't continually flapping,
946 * and ensure that new files don't get extremely fragmented due to
947 * only a small amount of available space in the filesystem.
948 * We want to set the ENOSPC when there is less than reserved size
949 * free and clear it when there is at least 2*reserved size free space.
950 * the function updates current precreation status used: functional or not
952 * \param[in] d OSP device
953 * \param[in] rc new precreate status for device \a d
955 * \retval 0 on success
956 * \retval negative negated errno on error
958 void osp_pre_update_status(struct osp_device *d, int rc)
960 struct obd_statfs *msfs = &d->opd_statfs;
961 int old = d->opd_pre_status;
964 d->opd_pre_status = rc;
968 if (likely(msfs->os_type)) {
969 if (unlikely(d->opd_reserved_mb_high == 0 &&
970 d->opd_reserved_mb_low == 0)) {
971 /* Use ~0.1% by default to disable object allocation,
972 * and ~0.2% to enable, size in MB, set both watermark
974 spin_lock(&d->opd_pre_lock);
975 if (d->opd_reserved_mb_high == 0 &&
976 d->opd_reserved_mb_low == 0) {
977 d->opd_reserved_mb_low =
978 ((msfs->os_bsize >> 10) *
979 msfs->os_blocks) >> 20;
980 if (d->opd_reserved_mb_low == 0)
981 d->opd_reserved_mb_low = 1;
982 d->opd_reserved_mb_high =
983 (d->opd_reserved_mb_low << 1) + 1;
985 spin_unlock(&d->opd_pre_lock);
988 available = (msfs->os_bavail * (msfs->os_bsize >> 10)) >> 10;
989 if (msfs->os_ffree < 32)
990 msfs->os_state |= OS_STATE_ENOINO;
991 else if (msfs->os_ffree > 64)
992 msfs->os_state &= ~OS_STATE_ENOINO;
994 if (available < d->opd_reserved_mb_low)
995 msfs->os_state |= OS_STATE_ENOSPC;
996 else if (available > d->opd_reserved_mb_high)
997 msfs->os_state &= ~OS_STATE_ENOSPC;
998 if (msfs->os_state & (OS_STATE_ENOINO | OS_STATE_ENOSPC)) {
999 d->opd_pre_status = -ENOSPC;
1001 CDEBUG(D_INFO, "%s: status: %llu blocks, %llu "
1002 "free, %llu avail, %llu MB avail, %u "
1003 "hwm -> %d: rc = %d\n",
1004 d->opd_obd->obd_name, msfs->os_blocks,
1005 msfs->os_bfree, msfs->os_bavail,
1006 available, d->opd_reserved_mb_high,
1007 d->opd_pre_status, rc);
1009 "non-committed changes: %u, in progress: %u\n",
1010 atomic_read(&d->opd_syn_changes),
1011 atomic_read(&d->opd_syn_rpc_in_progress));
1012 } else if (unlikely(old == -ENOSPC)) {
1013 d->opd_pre_status = 0;
1014 spin_lock(&d->opd_pre_lock);
1015 d->opd_pre_create_slow = 0;
1016 d->opd_pre_create_count = OST_MIN_PRECREATE;
1017 spin_unlock(&d->opd_pre_lock);
1018 wake_up(&d->opd_pre_waitq);
1020 CDEBUG(D_INFO, "%s: space available: %llu blocks, %llu"
1021 " free, %llu avail, %lluMB avail, %u lwm"
1022 " -> %d: rc = %d\n", d->opd_obd->obd_name,
1023 msfs->os_blocks, msfs->os_bfree, msfs->os_bavail,
1024 available, d->opd_reserved_mb_low,
1025 d->opd_pre_status, rc);
1029 wake_up(&d->opd_pre_user_waitq);
1033 * Initialize FID for precreation
1035 * For a just created new target, a new sequence should be taken.
1036 * The function checks there is no IDIF in use (if the target was
1037 * added with the older version of Lustre), then requests a new
1038 * sequence from FLDB using the regular protocol. Then this new
1039 * sequence is stored on a persisten storage synchronously to prevent
1040 * possible object leakage (for the detail see the description for
1041 * osp_precreate_rollover_new_seq()).
1043 * \param[in] osp OSP device
1045 * \retval 0 on success
1046 * \retval negative negated errno on error
1048 int osp_init_pre_fid(struct osp_device *osp)
1051 struct osp_thread_info *osi;
1052 struct lu_client_seq *cli_seq;
1053 struct lu_fid *last_fid;
1057 LASSERT(osp->opd_pre != NULL);
1059 /* Let's check if the current last_seq/fid is valid,
1060 * otherwise request new sequence from the controller */
1061 if (osp_is_fid_client(osp) && osp->opd_group != 0) {
1062 /* Non-MDT0 can only use normal sequence for
1064 if (fid_is_norm(&osp->opd_last_used_fid))
1067 /* Initially MDT0 will start with IDIF, after
1068 * that it will request new sequence from the
1070 if (fid_is_idif(&osp->opd_last_used_fid) ||
1071 fid_is_norm(&osp->opd_last_used_fid))
1075 if (!fid_is_zero(&osp->opd_last_used_fid))
1076 CWARN("%s: invalid last used fid "DFID
1077 ", try to get new sequence.\n",
1078 osp->opd_obd->obd_name,
1079 PFID(&osp->opd_last_used_fid));
1081 rc = lu_env_init(&env, osp->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
1083 CERROR("%s: init env error: rc = %d\n",
1084 osp->opd_obd->obd_name, rc);
1088 osi = osp_env_info(&env);
1089 last_fid = &osi->osi_fid;
1091 /* For a freshed fs, it will allocate a new sequence first */
1092 if (osp_is_fid_client(osp) && osp->opd_group != 0) {
1093 cli_seq = osp->opd_obd->u.cli.cl_seq;
1094 rc = seq_client_get_seq(&env, cli_seq, &last_fid->f_seq);
1096 CERROR("%s: alloc fid error: rc = %d\n",
1097 osp->opd_obd->obd_name, rc);
1101 last_fid->f_seq = fid_idif_seq(0, osp->opd_index);
1103 last_fid->f_oid = 1;
1104 last_fid->f_ver = 0;
1106 spin_lock(&osp->opd_pre_lock);
1107 osp->opd_last_used_fid = *last_fid;
1108 osp->opd_pre_used_fid = *last_fid;
1109 osp->opd_pre_last_created_fid = *last_fid;
1110 spin_unlock(&osp->opd_pre_lock);
1111 rc = osp_write_last_oid_seq_files(&env, osp, last_fid, 1);
1113 CERROR("%s: write fid error: rc = %d\n",
1114 osp->opd_obd->obd_name, rc);
1123 * The core of precreate functionality
1125 * The function implements the main precreation loop. Basically it
1126 * involves connecting to the target, precerate FID initialization,
1127 * identifying and removing orphans, then serving precreation. As
1128 * part of the latter, the thread is responsible for statfs data
1129 * updates. The precreation is mostly driven by another threads
1130 * asking for new OST objects - those askers wake the thread when
1131 * the number of precreated objects reach low watermark.
1132 * After a disconnect, the sequence above repeats. This is keep going
1133 * until the thread is requested to stop.
1135 * \param[in] _arg private data the thread (OSP device to handle)
1137 * \retval 0 on success
1138 * \retval negative negated errno on error
1140 static int osp_precreate_thread(void *_arg)
1142 struct osp_device *d = _arg;
1143 struct ptlrpc_thread *thread = &d->opd_pre_thread;
1144 struct l_wait_info lwi = { 0 };
1145 struct l_wait_info lwi2 = LWI_TIMEOUT(cfs_time_seconds(5),
1146 back_to_sleep, NULL);
1152 rc = lu_env_init(&env, d->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
1154 CERROR("%s: init env error: rc = %d\n", d->opd_obd->obd_name,
1157 spin_lock(&d->opd_pre_lock);
1158 thread->t_flags = SVC_STOPPED;
1159 spin_unlock(&d->opd_pre_lock);
1160 wake_up(&thread->t_ctl_waitq);
1165 spin_lock(&d->opd_pre_lock);
1166 thread->t_flags = SVC_RUNNING;
1167 spin_unlock(&d->opd_pre_lock);
1168 wake_up(&thread->t_ctl_waitq);
1170 while (osp_precreate_running(d)) {
1172 * need to be connected to OST
1174 while (osp_precreate_running(d)) {
1175 if (d->opd_pre_recovering &&
1176 d->opd_imp_connected &&
1177 !d->opd_got_disconnected)
1179 l_wait_event(d->opd_pre_waitq,
1180 !osp_precreate_running(d) ||
1181 d->opd_new_connection,
1184 if (!d->opd_new_connection)
1187 d->opd_new_connection = 0;
1188 d->opd_got_disconnected = 0;
1192 if (!osp_precreate_running(d))
1195 LASSERT(d->opd_obd->u.cli.cl_seq != NULL);
1196 /* Sigh, fid client is not ready yet */
1197 if (d->opd_obd->u.cli.cl_seq->lcs_exp == NULL)
1200 /* Init fid for osp_precreate if necessary */
1201 rc = osp_init_pre_fid(d);
1203 class_export_put(d->opd_exp);
1204 d->opd_obd->u.cli.cl_seq->lcs_exp = NULL;
1205 CERROR("%s: init pre fid error: rc = %d\n",
1206 d->opd_obd->obd_name, rc);
1210 if (osp_statfs_update(d)) {
1211 l_wait_event(d->opd_pre_waitq,
1212 !osp_precreate_running(d), &lwi2);
1217 * Clean up orphans or recreate missing objects.
1219 rc = osp_precreate_cleanup_orphans(&env, d);
1221 schedule_timeout_interruptible(cfs_time_seconds(1));
1225 * connected, can handle precreates now
1227 while (osp_precreate_running(d)) {
1228 l_wait_event(d->opd_pre_waitq,
1229 !osp_precreate_running(d) ||
1230 osp_precreate_near_empty(&env, d) ||
1231 osp_statfs_need_update(d) ||
1232 d->opd_got_disconnected, &lwi);
1234 if (!osp_precreate_running(d))
1237 /* something happened to the connection
1238 * have to start from the beginning */
1239 if (d->opd_got_disconnected)
1242 if (osp_statfs_need_update(d))
1243 if (osp_statfs_update(d))
1246 /* To avoid handling different seq in precreate/orphan
1247 * cleanup, it will hold precreate until current seq is
1249 if (unlikely(osp_precreate_end_seq(&env, d) &&
1250 !osp_create_end_seq(&env, d)))
1253 if (unlikely(osp_precreate_end_seq(&env, d) &&
1254 osp_create_end_seq(&env, d))) {
1255 LCONSOLE_INFO("%s:%#llx is used up."
1256 " Update to new seq\n",
1257 d->opd_obd->obd_name,
1258 fid_seq(&d->opd_pre_last_created_fid));
1259 rc = osp_precreate_rollover_new_seq(&env, d);
1264 if (osp_precreate_near_empty(&env, d)) {
1265 rc = osp_precreate_send(&env, d);
1266 /* osp_precreate_send() sets opd_pre_status
1267 * in case of error, that prevent the using of
1269 if (rc < 0 && rc != -ENOSPC &&
1270 rc != -ETIMEDOUT && rc != -ENOTCONN)
1271 CERROR("%s: cannot precreate objects:"
1273 d->opd_obd->obd_name, rc);
1278 thread->t_flags = SVC_STOPPED;
1280 wake_up(&thread->t_ctl_waitq);
1286 * Check when to stop to wait for precreate objects.
1288 * The caller wanting a new OST object can't wait undefinitely. The
1289 * function checks for few conditions including available new OST
1290 * objects, disconnected OST, lack of space with no pending destroys,
1291 * etc. IOW, it checks whether the current OSP state is good to keep
1292 * waiting or it's better to give up.
1294 * \param[in] env LU environment provided by the caller
1295 * \param[in] d OSP device
1297 * \retval 0 - keep waiting, 1 - no luck
1299 static int osp_precreate_ready_condition(const struct lu_env *env,
1300 struct osp_device *d)
1302 if (d->opd_pre_recovering)
1305 /* ready if got enough precreated objects */
1306 /* we need to wait for others (opd_pre_reserved) and our object (+1) */
1307 if (d->opd_pre_reserved + 1 < osp_objs_precreated(env, d))
1310 /* ready if OST reported no space and no destroys in progress */
1311 if (atomic_read(&d->opd_syn_changes) +
1312 atomic_read(&d->opd_syn_rpc_in_progress) == 0 &&
1313 d->opd_pre_status == -ENOSPC)
1316 /* Bail out I/O fails to OST */
1317 if (d->opd_pre_status != 0 &&
1318 d->opd_pre_status != -EAGAIN &&
1319 d->opd_pre_status != -ENODEV &&
1320 d->opd_pre_status != -ENOTCONN &&
1321 d->opd_pre_status != -ENOSPC) {
1323 if (d->opd_pre_status != -EIO)
1324 CERROR("%s: precreate failed opd_pre_status %d\n",
1325 d->opd_obd->obd_name, d->opd_pre_status);
1332 static int osp_precreate_timeout_condition(void *data)
1334 struct osp_device *d = data;
1336 CDEBUG(D_HA, "%s: slow creates, last="DFID", next="DFID", "
1337 "reserved=%llu, syn_changes=%u, "
1338 "syn_rpc_in_progress=%d, status=%d\n",
1339 d->opd_obd->obd_name, PFID(&d->opd_pre_last_created_fid),
1340 PFID(&d->opd_pre_used_fid), d->opd_pre_reserved,
1341 atomic_read(&d->opd_syn_changes),
1342 atomic_read(&d->opd_syn_rpc_in_progress),
1349 * Reserve object in precreate pool
1351 * When the caller wants to create a new object on this target (target
1352 * represented by the given OSP), it should declare this intention using
1353 * a regular ->dt_declare_create() OSD API method. Then OSP will be trying
1354 * to reserve an object in the existing precreated pool or wait up to
1355 * obd_timeout for the available object to appear in the pool (a dedicated
1356 * thread will be doing real precreation in background). The object can be
1357 * consumed later with osp_precreate_get_fid() or be released with call to
1358 * lu_object_put(). Notice the function doesn't reserve a specific ID, just
1359 * some ID. The actual ID assignment happen in osp_precreate_get_fid().
1360 * If the space on the target is short and there is a pending object destroy,
1361 * then the function forces local commit to speedup space release (see
1362 * osp_sync.c for the details).
1364 * \param[in] env LU environment provided by the caller
1365 * \param[in] d OSP device
1367 * \retval 0 on success
1368 * \retval -ENOSPC when no space on OST
1369 * \retval -EAGAIN try later, slow precreation in progress
1370 * \retval -EIO when no access to OST
1372 int osp_precreate_reserve(const struct lu_env *env, struct osp_device *d)
1374 struct l_wait_info lwi;
1375 cfs_time_t expire = cfs_time_shift(obd_timeout);
1380 LASSERTF(osp_objs_precreated(env, d) >= 0, "Last created FID "DFID
1381 "Next FID "DFID"\n", PFID(&d->opd_pre_last_created_fid),
1382 PFID(&d->opd_pre_used_fid));
1384 /* opd_pre_max_create_count 0 to not use specified OST. */
1385 if (d->opd_pre_max_create_count == 0)
1388 if (OBD_FAIL_PRECHECK(OBD_FAIL_MDS_OSP_PRECREATE_WAIT)) {
1389 if (d->opd_index == cfs_fail_val)
1390 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_OSP_PRECREATE_WAIT,
1396 * - preallocation is done
1397 * - no free space expected soon
1398 * - can't connect to OST for too long (obd_timeout)
1399 * - OST can allocate fid sequence.
1401 while ((rc = d->opd_pre_status) == 0 || rc == -ENOSPC ||
1402 rc == -ENODEV || rc == -EAGAIN || rc == -ENOTCONN) {
1405 * increase number of precreations
1407 precreated = osp_objs_precreated(env, d);
1408 if (d->opd_pre_create_count < d->opd_pre_max_create_count &&
1409 d->opd_pre_create_slow == 0 &&
1410 precreated <= (d->opd_pre_create_count / 4 + 1)) {
1411 spin_lock(&d->opd_pre_lock);
1412 d->opd_pre_create_slow = 1;
1413 d->opd_pre_create_count *= 2;
1414 spin_unlock(&d->opd_pre_lock);
1417 spin_lock(&d->opd_pre_lock);
1418 precreated = osp_objs_precreated(env, d);
1419 if (precreated > d->opd_pre_reserved &&
1420 !d->opd_pre_recovering) {
1421 d->opd_pre_reserved++;
1422 spin_unlock(&d->opd_pre_lock);
1425 /* XXX: don't wake up if precreation is in progress */
1426 if (osp_precreate_near_empty_nolock(env, d) &&
1427 !osp_precreate_end_seq_nolock(env, d))
1428 wake_up(&d->opd_pre_waitq);
1432 spin_unlock(&d->opd_pre_lock);
1435 * all precreated objects have been used and no-space
1436 * status leave us no chance to succeed very soon
1437 * but if there is destroy in progress, then we should
1438 * wait till that is done - some space might be released
1440 if (unlikely(rc == -ENOSPC)) {
1441 if (atomic_read(&d->opd_syn_changes)) {
1442 /* force local commit to release space */
1443 dt_commit_async(env, d->opd_storage);
1445 if (atomic_read(&d->opd_syn_rpc_in_progress)) {
1446 /* just wait till destroys are done */
1447 /* see l_wait_even() few lines below */
1449 if (atomic_read(&d->opd_syn_changes) +
1450 atomic_read(&d->opd_syn_rpc_in_progress) == 0) {
1451 /* no hope for free space */
1456 /* XXX: don't wake up if precreation is in progress */
1457 wake_up(&d->opd_pre_waitq);
1459 lwi = LWI_TIMEOUT(expire - cfs_time_current(),
1460 osp_precreate_timeout_condition, d);
1461 if (cfs_time_aftereq(cfs_time_current(), expire)) {
1466 l_wait_event(d->opd_pre_user_waitq,
1467 osp_precreate_ready_condition(env, d), &lwi);
1474 * Get a FID from precreation pool
1476 * The function is a companion for osp_precreate_reserve() - it assigns
1477 * a specific FID from the precreate. The function should be called only
1478 * if the call to osp_precreate_reserve() was successful. The function
1479 * updates a local storage to remember the highest object ID referenced
1480 * by the node in the given sequence.
1482 * A very importan details: this is supposed to be called once the
1483 * transaction is started, so on-disk update will be atomic with the
1484 * data (like LOVEA) refering this object. Then the object won't be leaked:
1485 * either it's referenced by the committed transaction or it's a subject
1486 * to the orphan cleanup procedure.
1488 * \param[in] env LU environment provided by the caller
1489 * \param[in] d OSP device
1490 * \param[out] fid generated FID
1492 * \retval 0 on success
1493 * \retval negative negated errno on error
1495 int osp_precreate_get_fid(const struct lu_env *env, struct osp_device *d,
1498 /* grab next id from the pool */
1499 spin_lock(&d->opd_pre_lock);
1501 LASSERTF(osp_fid_diff(&d->opd_pre_used_fid,
1502 &d->opd_pre_last_created_fid) < 0,
1503 "next fid "DFID" last created fid "DFID"\n",
1504 PFID(&d->opd_pre_used_fid),
1505 PFID(&d->opd_pre_last_created_fid));
1507 d->opd_pre_used_fid.f_oid++;
1508 memcpy(fid, &d->opd_pre_used_fid, sizeof(*fid));
1509 d->opd_pre_reserved--;
1511 * last_used_id must be changed along with getting new id otherwise
1512 * we might miscalculate gap causing object loss or leak
1514 osp_update_last_fid(d, fid);
1515 spin_unlock(&d->opd_pre_lock);
1518 * probably main thread suspended orphan cleanup till
1519 * all reservations are released, see comment in
1520 * osp_precreate_thread() just before orphan cleanup
1522 if (unlikely(d->opd_pre_reserved == 0 && d->opd_pre_status))
1523 wake_up(&d->opd_pre_waitq);
1529 * Set size regular attribute on an object
1531 * When a striping is created late, it's possible that size is already
1532 * initialized on the file. Then the new striping should inherit size
1533 * from the file. The function sets size on the object using the regular
1534 * protocol (OST_PUNCH).
1535 * XXX: should be re-implemented using OUT ?
1537 * \param[in] env LU environment provided by the caller
1538 * \param[in] dt object
1539 * \param[in] size size to set.
1541 * \retval 0 on success
1542 * \retval negative negated errno on error
1544 int osp_object_truncate(const struct lu_env *env, struct dt_object *dt,
1547 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
1548 struct ptlrpc_request *req = NULL;
1549 struct obd_import *imp;
1550 struct ost_body *body;
1551 struct obdo *oa = NULL;
1556 imp = d->opd_obd->u.cli.cl_import;
1559 req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
1563 /* XXX: capa support? */
1564 /* osc_set_capa_size(req, &RMF_CAPA1, capa); */
1565 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
1567 ptlrpc_request_free(req);
1572 * XXX: decide how do we do here with resend
1573 * if we don't resend, then client may see wrong file size
1574 * if we do resend, then MDS thread can get stuck for quite long
1575 * and if we don't resend, then client will also get -EWOULDBLOCK !!
1576 * (see LU-7975 and sanity/test_27F use cases)
1577 * but let's decide not to resend/delay this truncate request to OST
1578 * and allow Client to decide to resend, in a less agressive way from
1579 * after_reply(), by returning -EINPROGRESS instead of
1580 * -EAGAIN/-EWOULDBLOCK upon return from ptlrpc_queue_wait() at the
1581 * end of this routine
1583 req->rq_no_resend = req->rq_no_delay = 1;
1585 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1586 ptlrpc_at_set_req_timeout(req);
1590 GOTO(out, rc = -ENOMEM);
1592 rc = fid_to_ostid(lu_object_fid(&dt->do_lu), &oa->o_oi);
1595 oa->o_blocks = OBD_OBJECT_EOF;
1596 oa->o_valid = OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1597 OBD_MD_FLID | OBD_MD_FLGROUP;
1599 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1601 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1603 /* XXX: capa support? */
1604 /* osc_pack_capa(req, body, capa); */
1606 ptlrpc_request_set_replen(req);
1608 rc = ptlrpc_queue_wait(req);
1610 /* -EWOULDBLOCK/-EAGAIN means OST is unreachable at the moment
1611 * since we have decided not to resend/delay, but this could
1612 * lead to wrong size to be seen at Client side and even process
1613 * trying to open to exit/fail if not itself handling -EAGAIN.
1614 * So it should be better to return -EINPROGRESS instead and
1615 * leave the decision to resend at Client side in after_reply()
1617 if (rc == -EWOULDBLOCK) {
1619 CDEBUG(D_HA, "returning -EINPROGRESS instead of "
1620 "-EWOULDBLOCK/-EAGAIN to allow Client to "
1623 CERROR("can't punch object: %d\n", rc);
1627 ptlrpc_req_finished(req);
1634 * Initialize precreation functionality of OSP
1636 * Prepares all the internal structures and starts the precreate thread
1638 * \param[in] d OSP device
1640 * \retval 0 on success
1641 * \retval negative negated errno on error
1643 int osp_init_precreate(struct osp_device *d)
1645 struct l_wait_info lwi = { 0 };
1646 struct task_struct *task;
1650 OBD_ALLOC_PTR(d->opd_pre);
1651 if (d->opd_pre == NULL)
1654 /* initially precreation isn't ready */
1655 d->opd_pre_status = -EAGAIN;
1656 fid_zero(&d->opd_pre_used_fid);
1657 d->opd_pre_used_fid.f_oid = 1;
1658 fid_zero(&d->opd_pre_last_created_fid);
1659 d->opd_pre_last_created_fid.f_oid = 1;
1660 d->opd_pre_reserved = 0;
1661 d->opd_got_disconnected = 1;
1662 d->opd_pre_create_slow = 0;
1663 d->opd_pre_create_count = OST_MIN_PRECREATE;
1664 d->opd_pre_min_create_count = OST_MIN_PRECREATE;
1665 d->opd_pre_max_create_count = OST_MAX_PRECREATE;
1666 d->opd_reserved_mb_high = 0;
1667 d->opd_reserved_mb_low = 0;
1669 spin_lock_init(&d->opd_pre_lock);
1670 init_waitqueue_head(&d->opd_pre_waitq);
1671 init_waitqueue_head(&d->opd_pre_user_waitq);
1672 thread_set_flags(&d->opd_pre_thread, SVC_INIT);
1673 init_waitqueue_head(&d->opd_pre_thread.t_ctl_waitq);
1676 * Initialize statfs-related things
1678 d->opd_statfs_maxage = 5; /* default update interval */
1679 d->opd_statfs_fresh_till = cfs_time_shift(-1000);
1680 CDEBUG(D_OTHER, "current %llu, fresh till %llu\n",
1681 (unsigned long long)cfs_time_current(),
1682 (unsigned long long)d->opd_statfs_fresh_till);
1683 setup_timer(&d->opd_statfs_timer, osp_statfs_timer_cb,
1686 if (d->opd_storage->dd_rdonly)
1690 * start thread handling precreation and statfs updates
1692 task = kthread_run(osp_precreate_thread, d,
1693 "osp-pre-%u-%u", d->opd_index, d->opd_group);
1695 CERROR("can't start precreate thread %ld\n", PTR_ERR(task));
1696 RETURN(PTR_ERR(task));
1699 l_wait_event(d->opd_pre_thread.t_ctl_waitq,
1700 osp_precreate_running(d) || osp_precreate_stopped(d),
1707 * Finish precreate functionality of OSP
1710 * Asks all the activity (the thread, update timer) to stop, then
1711 * wait till that is done.
1713 * \param[in] d OSP device
1715 void osp_precreate_fini(struct osp_device *d)
1717 struct ptlrpc_thread *thread = &d->opd_pre_thread;
1720 del_timer(&d->opd_statfs_timer);
1722 if (d->opd_pre == NULL)
1725 if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
1726 thread->t_flags = SVC_STOPPING;
1727 wake_up(&d->opd_pre_waitq);
1728 wait_event(thread->t_ctl_waitq, thread_is_stopped(thread));
1731 OBD_FREE_PTR(d->opd_pre);