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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_OSC
35 #include <linux/workqueue.h>
36 #include <lprocfs_status.h>
37 #include <lustre_debug.h>
38 #include <lustre_dlm.h>
39 #include <lustre_fid.h>
40 #include <lustre_ha.h>
41 #include <uapi/linux/lustre/lustre_ioctl.h>
42 #include <lustre_net.h>
43 #include <lustre_obdo.h>
45 #include <obd_cksum.h>
46 #include <obd_class.h>
47 #include <lustre_osc.h>
49 #include "osc_internal.h"
51 atomic_t osc_pool_req_count;
52 unsigned int osc_reqpool_maxreqcount;
53 struct ptlrpc_request_pool *osc_rq_pool;
55 /* max memory used for request pool, unit is MB */
56 static unsigned int osc_reqpool_mem_max = 5;
57 module_param(osc_reqpool_mem_max, uint, 0444);
59 static int osc_idle_timeout = 20;
60 module_param(osc_idle_timeout, uint, 0644);
62 #define osc_grant_args osc_brw_async_args
64 struct osc_setattr_args {
66 obd_enqueue_update_f sa_upcall;
70 struct osc_fsync_args {
71 struct osc_object *fa_obj;
73 obd_enqueue_update_f fa_upcall;
77 struct osc_ladvise_args {
79 obd_enqueue_update_f la_upcall;
83 static void osc_release_ppga(struct brw_page **ppga, size_t count);
84 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
87 void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
89 struct ost_body *body;
91 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
94 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
97 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
100 struct ptlrpc_request *req;
101 struct ost_body *body;
105 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
109 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
111 ptlrpc_request_free(req);
115 osc_pack_req_body(req, oa);
117 ptlrpc_request_set_replen(req);
119 rc = ptlrpc_queue_wait(req);
123 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
125 GOTO(out, rc = -EPROTO);
127 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
128 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
130 oa->o_blksize = cli_brw_size(exp->exp_obd);
131 oa->o_valid |= OBD_MD_FLBLKSZ;
135 ptlrpc_req_finished(req);
140 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
143 struct ptlrpc_request *req;
144 struct ost_body *body;
148 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
150 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
154 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
156 ptlrpc_request_free(req);
160 osc_pack_req_body(req, oa);
162 ptlrpc_request_set_replen(req);
164 rc = ptlrpc_queue_wait(req);
168 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
170 GOTO(out, rc = -EPROTO);
172 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
176 ptlrpc_req_finished(req);
181 static int osc_setattr_interpret(const struct lu_env *env,
182 struct ptlrpc_request *req, void *args, int rc)
184 struct osc_setattr_args *sa = args;
185 struct ost_body *body;
192 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
194 GOTO(out, rc = -EPROTO);
196 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
199 rc = sa->sa_upcall(sa->sa_cookie, rc);
203 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
204 obd_enqueue_update_f upcall, void *cookie,
205 struct ptlrpc_request_set *rqset)
207 struct ptlrpc_request *req;
208 struct osc_setattr_args *sa;
213 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
217 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
219 ptlrpc_request_free(req);
223 osc_pack_req_body(req, oa);
225 ptlrpc_request_set_replen(req);
227 /* do mds to ost setattr asynchronously */
229 /* Do not wait for response. */
230 ptlrpcd_add_req(req);
232 req->rq_interpret_reply = osc_setattr_interpret;
234 sa = ptlrpc_req_async_args(sa, req);
236 sa->sa_upcall = upcall;
237 sa->sa_cookie = cookie;
239 if (rqset == PTLRPCD_SET)
240 ptlrpcd_add_req(req);
242 ptlrpc_set_add_req(rqset, req);
248 static int osc_ladvise_interpret(const struct lu_env *env,
249 struct ptlrpc_request *req,
252 struct osc_ladvise_args *la = arg;
253 struct ost_body *body;
259 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
261 GOTO(out, rc = -EPROTO);
263 *la->la_oa = body->oa;
265 rc = la->la_upcall(la->la_cookie, rc);
270 * If rqset is NULL, do not wait for response. Upcall and cookie could also
271 * be NULL in this case
273 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
274 struct ladvise_hdr *ladvise_hdr,
275 obd_enqueue_update_f upcall, void *cookie,
276 struct ptlrpc_request_set *rqset)
278 struct ptlrpc_request *req;
279 struct ost_body *body;
280 struct osc_ladvise_args *la;
282 struct lu_ladvise *req_ladvise;
283 struct lu_ladvise *ladvise = ladvise_hdr->lah_advise;
284 int num_advise = ladvise_hdr->lah_count;
285 struct ladvise_hdr *req_ladvise_hdr;
288 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_LADVISE);
292 req_capsule_set_size(&req->rq_pill, &RMF_OST_LADVISE, RCL_CLIENT,
293 num_advise * sizeof(*ladvise));
294 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_LADVISE);
296 ptlrpc_request_free(req);
299 req->rq_request_portal = OST_IO_PORTAL;
300 ptlrpc_at_set_req_timeout(req);
302 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
304 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
307 req_ladvise_hdr = req_capsule_client_get(&req->rq_pill,
308 &RMF_OST_LADVISE_HDR);
309 memcpy(req_ladvise_hdr, ladvise_hdr, sizeof(*ladvise_hdr));
311 req_ladvise = req_capsule_client_get(&req->rq_pill, &RMF_OST_LADVISE);
312 memcpy(req_ladvise, ladvise, sizeof(*ladvise) * num_advise);
313 ptlrpc_request_set_replen(req);
316 /* Do not wait for response. */
317 ptlrpcd_add_req(req);
321 req->rq_interpret_reply = osc_ladvise_interpret;
322 la = ptlrpc_req_async_args(la, req);
324 la->la_upcall = upcall;
325 la->la_cookie = cookie;
327 if (rqset == PTLRPCD_SET)
328 ptlrpcd_add_req(req);
330 ptlrpc_set_add_req(rqset, req);
335 static int osc_create(const struct lu_env *env, struct obd_export *exp,
338 struct ptlrpc_request *req;
339 struct ost_body *body;
344 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
345 LASSERT(fid_seq_is_echo(ostid_seq(&oa->o_oi)));
347 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
349 GOTO(out, rc = -ENOMEM);
351 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
353 ptlrpc_request_free(req);
357 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
360 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
362 ptlrpc_request_set_replen(req);
364 rc = ptlrpc_queue_wait(req);
368 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
370 GOTO(out_req, rc = -EPROTO);
372 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
373 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
375 oa->o_blksize = cli_brw_size(exp->exp_obd);
376 oa->o_valid |= OBD_MD_FLBLKSZ;
378 CDEBUG(D_HA, "transno: %lld\n",
379 lustre_msg_get_transno(req->rq_repmsg));
381 ptlrpc_req_finished(req);
386 int osc_punch_send(struct obd_export *exp, struct obdo *oa,
387 obd_enqueue_update_f upcall, void *cookie)
389 struct ptlrpc_request *req;
390 struct osc_setattr_args *sa;
391 struct obd_import *imp = class_exp2cliimp(exp);
392 struct ost_body *body;
397 req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
401 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
403 ptlrpc_request_free(req);
407 osc_set_io_portal(req);
409 ptlrpc_at_set_req_timeout(req);
411 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
413 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
415 ptlrpc_request_set_replen(req);
417 req->rq_interpret_reply = osc_setattr_interpret;
418 sa = ptlrpc_req_async_args(sa, req);
420 sa->sa_upcall = upcall;
421 sa->sa_cookie = cookie;
423 ptlrpcd_add_req(req);
427 EXPORT_SYMBOL(osc_punch_send);
429 static int osc_sync_interpret(const struct lu_env *env,
430 struct ptlrpc_request *req, void *args, int rc)
432 struct osc_fsync_args *fa = args;
433 struct ost_body *body;
434 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
435 unsigned long valid = 0;
436 struct cl_object *obj;
442 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
444 CERROR("can't unpack ost_body\n");
445 GOTO(out, rc = -EPROTO);
448 *fa->fa_oa = body->oa;
449 obj = osc2cl(fa->fa_obj);
451 /* Update osc object's blocks attribute */
452 cl_object_attr_lock(obj);
453 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
454 attr->cat_blocks = body->oa.o_blocks;
459 cl_object_attr_update(env, obj, attr, valid);
460 cl_object_attr_unlock(obj);
463 rc = fa->fa_upcall(fa->fa_cookie, rc);
467 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
468 obd_enqueue_update_f upcall, void *cookie,
469 struct ptlrpc_request_set *rqset)
471 struct obd_export *exp = osc_export(obj);
472 struct ptlrpc_request *req;
473 struct ost_body *body;
474 struct osc_fsync_args *fa;
478 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
482 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
484 ptlrpc_request_free(req);
488 /* overload the size and blocks fields in the oa with start/end */
489 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
491 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
493 ptlrpc_request_set_replen(req);
494 req->rq_interpret_reply = osc_sync_interpret;
496 fa = ptlrpc_req_async_args(fa, req);
499 fa->fa_upcall = upcall;
500 fa->fa_cookie = cookie;
502 if (rqset == PTLRPCD_SET)
503 ptlrpcd_add_req(req);
505 ptlrpc_set_add_req(rqset, req);
510 /* Find and cancel locally locks matched by @mode in the resource found by
511 * @objid. Found locks are added into @cancel list. Returns the amount of
512 * locks added to @cancels list. */
513 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
514 struct list_head *cancels,
515 enum ldlm_mode mode, __u64 lock_flags)
517 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
518 struct ldlm_res_id res_id;
519 struct ldlm_resource *res;
523 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
524 * export) but disabled through procfs (flag in NS).
526 * This distinguishes from a case when ELC is not supported originally,
527 * when we still want to cancel locks in advance and just cancel them
528 * locally, without sending any RPC. */
529 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
532 ostid_build_res_name(&oa->o_oi, &res_id);
533 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
537 LDLM_RESOURCE_ADDREF(res);
538 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
539 lock_flags, 0, NULL);
540 LDLM_RESOURCE_DELREF(res);
541 ldlm_resource_putref(res);
545 static int osc_destroy_interpret(const struct lu_env *env,
546 struct ptlrpc_request *req, void *args, int rc)
548 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
550 atomic_dec(&cli->cl_destroy_in_flight);
551 wake_up(&cli->cl_destroy_waitq);
556 static int osc_can_send_destroy(struct client_obd *cli)
558 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
559 cli->cl_max_rpcs_in_flight) {
560 /* The destroy request can be sent */
563 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
564 cli->cl_max_rpcs_in_flight) {
566 * The counter has been modified between the two atomic
569 wake_up(&cli->cl_destroy_waitq);
574 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
577 struct client_obd *cli = &exp->exp_obd->u.cli;
578 struct ptlrpc_request *req;
579 struct ost_body *body;
580 struct list_head cancels = LIST_HEAD_INIT(cancels);
585 CDEBUG(D_INFO, "oa NULL\n");
589 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
590 LDLM_FL_DISCARD_DATA);
592 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
594 ldlm_lock_list_put(&cancels, l_bl_ast, count);
598 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
601 ptlrpc_request_free(req);
605 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
606 ptlrpc_at_set_req_timeout(req);
608 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
610 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
612 ptlrpc_request_set_replen(req);
614 req->rq_interpret_reply = osc_destroy_interpret;
615 if (!osc_can_send_destroy(cli)) {
616 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
619 * Wait until the number of on-going destroy RPCs drops
620 * under max_rpc_in_flight
622 rc = l_wait_event_exclusive(cli->cl_destroy_waitq,
623 osc_can_send_destroy(cli), &lwi);
625 ptlrpc_req_finished(req);
630 /* Do not wait for response */
631 ptlrpcd_add_req(req);
635 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
638 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
640 LASSERT(!(oa->o_valid & bits));
643 spin_lock(&cli->cl_loi_list_lock);
644 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data, GRANT_PARAM))
645 oa->o_dirty = cli->cl_dirty_grant;
647 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
648 if (unlikely(cli->cl_dirty_pages - cli->cl_dirty_transit >
649 cli->cl_dirty_max_pages)) {
650 CERROR("dirty %lu - %lu > dirty_max %lu\n",
651 cli->cl_dirty_pages, cli->cl_dirty_transit,
652 cli->cl_dirty_max_pages);
654 } else if (unlikely(atomic_long_read(&obd_dirty_pages) -
655 atomic_long_read(&obd_dirty_transit_pages) >
656 (long)(obd_max_dirty_pages + 1))) {
657 /* The atomic_read() allowing the atomic_inc() are
658 * not covered by a lock thus they may safely race and trip
659 * this CERROR() unless we add in a small fudge factor (+1). */
660 CERROR("%s: dirty %ld - %ld > system dirty_max %ld\n",
661 cli_name(cli), atomic_long_read(&obd_dirty_pages),
662 atomic_long_read(&obd_dirty_transit_pages),
663 obd_max_dirty_pages);
665 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
667 CERROR("dirty %lu - dirty_max %lu too big???\n",
668 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
671 unsigned long nrpages;
672 unsigned long undirty;
674 nrpages = cli->cl_max_pages_per_rpc;
675 nrpages *= cli->cl_max_rpcs_in_flight + 1;
676 nrpages = max(nrpages, cli->cl_dirty_max_pages);
677 undirty = nrpages << PAGE_SHIFT;
678 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data,
682 /* take extent tax into account when asking for more
684 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
685 cli->cl_max_extent_pages;
686 undirty += nrextents * cli->cl_grant_extent_tax;
688 /* Do not ask for more than OBD_MAX_GRANT - a margin for server
689 * to add extent tax, etc.
691 oa->o_undirty = min(undirty, OBD_MAX_GRANT &
692 ~(PTLRPC_MAX_BRW_SIZE * 4UL));
694 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
695 oa->o_dropped = cli->cl_lost_grant;
696 cli->cl_lost_grant = 0;
697 spin_unlock(&cli->cl_loi_list_lock);
698 CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
699 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
702 void osc_update_next_shrink(struct client_obd *cli)
704 cli->cl_next_shrink_grant = ktime_get_seconds() +
705 cli->cl_grant_shrink_interval;
707 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
708 cli->cl_next_shrink_grant);
711 static void __osc_update_grant(struct client_obd *cli, u64 grant)
713 spin_lock(&cli->cl_loi_list_lock);
714 cli->cl_avail_grant += grant;
715 spin_unlock(&cli->cl_loi_list_lock);
718 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
720 if (body->oa.o_valid & OBD_MD_FLGRANT) {
721 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
722 __osc_update_grant(cli, body->oa.o_grant);
727 * grant thread data for shrinking space.
729 struct grant_thread_data {
730 struct list_head gtd_clients;
731 struct mutex gtd_mutex;
732 unsigned long gtd_stopped:1;
734 static struct grant_thread_data client_gtd;
736 static int osc_shrink_grant_interpret(const struct lu_env *env,
737 struct ptlrpc_request *req,
740 struct osc_grant_args *aa = args;
741 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
742 struct ost_body *body;
745 __osc_update_grant(cli, aa->aa_oa->o_grant);
749 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
751 osc_update_grant(cli, body);
753 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
759 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
761 spin_lock(&cli->cl_loi_list_lock);
762 oa->o_grant = cli->cl_avail_grant / 4;
763 cli->cl_avail_grant -= oa->o_grant;
764 spin_unlock(&cli->cl_loi_list_lock);
765 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
766 oa->o_valid |= OBD_MD_FLFLAGS;
769 oa->o_flags |= OBD_FL_SHRINK_GRANT;
770 osc_update_next_shrink(cli);
773 /* Shrink the current grant, either from some large amount to enough for a
774 * full set of in-flight RPCs, or if we have already shrunk to that limit
775 * then to enough for a single RPC. This avoids keeping more grant than
776 * needed, and avoids shrinking the grant piecemeal. */
777 static int osc_shrink_grant(struct client_obd *cli)
779 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
780 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
782 spin_lock(&cli->cl_loi_list_lock);
783 if (cli->cl_avail_grant <= target_bytes)
784 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
785 spin_unlock(&cli->cl_loi_list_lock);
787 return osc_shrink_grant_to_target(cli, target_bytes);
790 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
793 struct ost_body *body;
796 spin_lock(&cli->cl_loi_list_lock);
797 /* Don't shrink if we are already above or below the desired limit
798 * We don't want to shrink below a single RPC, as that will negatively
799 * impact block allocation and long-term performance. */
800 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
801 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
803 if (target_bytes >= cli->cl_avail_grant) {
804 spin_unlock(&cli->cl_loi_list_lock);
807 spin_unlock(&cli->cl_loi_list_lock);
813 osc_announce_cached(cli, &body->oa, 0);
815 spin_lock(&cli->cl_loi_list_lock);
816 if (target_bytes >= cli->cl_avail_grant) {
817 /* available grant has changed since target calculation */
818 spin_unlock(&cli->cl_loi_list_lock);
819 GOTO(out_free, rc = 0);
821 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
822 cli->cl_avail_grant = target_bytes;
823 spin_unlock(&cli->cl_loi_list_lock);
824 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
825 body->oa.o_valid |= OBD_MD_FLFLAGS;
826 body->oa.o_flags = 0;
828 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
829 osc_update_next_shrink(cli);
831 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
832 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
833 sizeof(*body), body, NULL);
835 __osc_update_grant(cli, body->oa.o_grant);
841 static int osc_should_shrink_grant(struct client_obd *client)
843 time64_t next_shrink = client->cl_next_shrink_grant;
845 if (client->cl_import == NULL)
848 if (!OCD_HAS_FLAG(&client->cl_import->imp_connect_data, GRANT_SHRINK) ||
849 client->cl_import->imp_grant_shrink_disabled)
852 if (ktime_get_seconds() >= next_shrink - 5) {
853 /* Get the current RPC size directly, instead of going via:
854 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
855 * Keep comment here so that it can be found by searching. */
856 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
858 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
859 client->cl_avail_grant > brw_size)
862 osc_update_next_shrink(client);
867 #define GRANT_SHRINK_RPC_BATCH 100
869 static struct delayed_work work;
871 static void osc_grant_work_handler(struct work_struct *data)
873 struct client_obd *cli;
875 bool init_next_shrink = true;
876 time64_t next_shrink = ktime_get_seconds() + GRANT_SHRINK_INTERVAL;
879 mutex_lock(&client_gtd.gtd_mutex);
880 list_for_each_entry(cli, &client_gtd.gtd_clients,
882 if (rpc_sent < GRANT_SHRINK_RPC_BATCH &&
883 osc_should_shrink_grant(cli)) {
884 osc_shrink_grant(cli);
888 if (!init_next_shrink) {
889 if (cli->cl_next_shrink_grant < next_shrink &&
890 cli->cl_next_shrink_grant > ktime_get_seconds())
891 next_shrink = cli->cl_next_shrink_grant;
893 init_next_shrink = false;
894 next_shrink = cli->cl_next_shrink_grant;
897 mutex_unlock(&client_gtd.gtd_mutex);
899 if (client_gtd.gtd_stopped == 1)
902 if (next_shrink > ktime_get_seconds()) {
903 time64_t delay = next_shrink - ktime_get_seconds();
905 schedule_delayed_work(&work, cfs_time_seconds(delay));
907 schedule_work(&work.work);
911 void osc_schedule_grant_work(void)
913 cancel_delayed_work_sync(&work);
914 schedule_work(&work.work);
918 * Start grant thread for returing grant to server for idle clients.
920 static int osc_start_grant_work(void)
922 client_gtd.gtd_stopped = 0;
923 mutex_init(&client_gtd.gtd_mutex);
924 INIT_LIST_HEAD(&client_gtd.gtd_clients);
926 INIT_DELAYED_WORK(&work, osc_grant_work_handler);
927 schedule_work(&work.work);
932 static void osc_stop_grant_work(void)
934 client_gtd.gtd_stopped = 1;
935 cancel_delayed_work_sync(&work);
938 static void osc_add_grant_list(struct client_obd *client)
940 mutex_lock(&client_gtd.gtd_mutex);
941 list_add(&client->cl_grant_chain, &client_gtd.gtd_clients);
942 mutex_unlock(&client_gtd.gtd_mutex);
945 static void osc_del_grant_list(struct client_obd *client)
947 if (list_empty(&client->cl_grant_chain))
950 mutex_lock(&client_gtd.gtd_mutex);
951 list_del_init(&client->cl_grant_chain);
952 mutex_unlock(&client_gtd.gtd_mutex);
955 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
958 * ocd_grant is the total grant amount we're expect to hold: if we've
959 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
960 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
963 * race is tolerable here: if we're evicted, but imp_state already
964 * left EVICTED state, then cl_dirty_pages must be 0 already.
966 spin_lock(&cli->cl_loi_list_lock);
967 cli->cl_avail_grant = ocd->ocd_grant;
968 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
969 cli->cl_avail_grant -= cli->cl_reserved_grant;
970 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
971 cli->cl_avail_grant -= cli->cl_dirty_grant;
973 cli->cl_avail_grant -=
974 cli->cl_dirty_pages << PAGE_SHIFT;
977 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
981 /* overhead for each extent insertion */
982 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
983 /* determine the appropriate chunk size used by osc_extent. */
984 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
985 ocd->ocd_grant_blkbits);
986 /* max_pages_per_rpc must be chunk aligned */
987 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
988 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
989 ~chunk_mask) & chunk_mask;
990 /* determine maximum extent size, in #pages */
991 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
992 cli->cl_max_extent_pages = size >> PAGE_SHIFT;
993 if (cli->cl_max_extent_pages == 0)
994 cli->cl_max_extent_pages = 1;
996 cli->cl_grant_extent_tax = 0;
997 cli->cl_chunkbits = PAGE_SHIFT;
998 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
1000 spin_unlock(&cli->cl_loi_list_lock);
1002 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
1003 "chunk bits: %d cl_max_extent_pages: %d\n",
1005 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
1006 cli->cl_max_extent_pages);
1008 if (OCD_HAS_FLAG(ocd, GRANT_SHRINK) && list_empty(&cli->cl_grant_chain))
1009 osc_add_grant_list(cli);
1011 EXPORT_SYMBOL(osc_init_grant);
1013 /* We assume that the reason this OSC got a short read is because it read
1014 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1015 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1016 * this stripe never got written at or beyond this stripe offset yet. */
1017 static void handle_short_read(int nob_read, size_t page_count,
1018 struct brw_page **pga)
1023 /* skip bytes read OK */
1024 while (nob_read > 0) {
1025 LASSERT (page_count > 0);
1027 if (pga[i]->count > nob_read) {
1028 /* EOF inside this page */
1029 ptr = kmap(pga[i]->pg) +
1030 (pga[i]->off & ~PAGE_MASK);
1031 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1038 nob_read -= pga[i]->count;
1043 /* zero remaining pages */
1044 while (page_count-- > 0) {
1045 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
1046 memset(ptr, 0, pga[i]->count);
1052 static int check_write_rcs(struct ptlrpc_request *req,
1053 int requested_nob, int niocount,
1054 size_t page_count, struct brw_page **pga)
1059 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1060 sizeof(*remote_rcs) *
1062 if (remote_rcs == NULL) {
1063 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1067 /* return error if any niobuf was in error */
1068 for (i = 0; i < niocount; i++) {
1069 if ((int)remote_rcs[i] < 0) {
1070 CDEBUG(D_INFO, "rc[%d]: %d req %p\n",
1071 i, remote_rcs[i], req);
1072 return remote_rcs[i];
1075 if (remote_rcs[i] != 0) {
1076 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1077 i, remote_rcs[i], req);
1081 if (req->rq_bulk != NULL &&
1082 req->rq_bulk->bd_nob_transferred != requested_nob) {
1083 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1084 req->rq_bulk->bd_nob_transferred, requested_nob);
1091 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1093 if (p1->flag != p2->flag) {
1094 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1095 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1096 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1098 /* warn if we try to combine flags that we don't know to be
1099 * safe to combine */
1100 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1101 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1102 "report this at https://jira.whamcloud.com/\n",
1103 p1->flag, p2->flag);
1108 return (p1->off + p1->count == p2->off);
1111 #if IS_ENABLED(CONFIG_CRC_T10DIF)
1112 static int osc_checksum_bulk_t10pi(const char *obd_name, int nob,
1113 size_t pg_count, struct brw_page **pga,
1114 int opc, obd_dif_csum_fn *fn,
1118 struct ahash_request *req;
1119 /* Used Adler as the default checksum type on top of DIF tags */
1120 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1121 struct page *__page;
1122 unsigned char *buffer;
1124 unsigned int bufsize;
1126 int used_number = 0;
1132 LASSERT(pg_count > 0);
1134 __page = alloc_page(GFP_KERNEL);
1138 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1141 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
1142 obd_name, cfs_crypto_hash_name(cfs_alg), rc);
1146 buffer = kmap(__page);
1147 guard_start = (__u16 *)buffer;
1148 guard_number = PAGE_SIZE / sizeof(*guard_start);
1149 while (nob > 0 && pg_count > 0) {
1150 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1152 /* corrupt the data before we compute the checksum, to
1153 * simulate an OST->client data error */
1154 if (unlikely(i == 0 && opc == OST_READ &&
1155 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))) {
1156 unsigned char *ptr = kmap(pga[i]->pg);
1157 int off = pga[i]->off & ~PAGE_MASK;
1159 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1164 * The left guard number should be able to hold checksums of a
1167 rc = obd_page_dif_generate_buffer(obd_name, pga[i]->pg,
1168 pga[i]->off & ~PAGE_MASK,
1170 guard_start + used_number,
1171 guard_number - used_number,
1177 used_number += used;
1178 if (used_number == guard_number) {
1179 cfs_crypto_hash_update_page(req, __page, 0,
1180 used_number * sizeof(*guard_start));
1184 nob -= pga[i]->count;
1192 if (used_number != 0)
1193 cfs_crypto_hash_update_page(req, __page, 0,
1194 used_number * sizeof(*guard_start));
1196 bufsize = sizeof(cksum);
1197 cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
1199 /* For sending we only compute the wrong checksum instead
1200 * of corrupting the data so it is still correct on a redo */
1201 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1206 __free_page(__page);
1209 #else /* !CONFIG_CRC_T10DIF */
1210 #define obd_dif_ip_fn NULL
1211 #define obd_dif_crc_fn NULL
1212 #define osc_checksum_bulk_t10pi(name, nob, pgc, pga, opc, fn, ssize, csum) \
1214 #endif /* CONFIG_CRC_T10DIF */
1216 static int osc_checksum_bulk(int nob, size_t pg_count,
1217 struct brw_page **pga, int opc,
1218 enum cksum_types cksum_type,
1222 struct ahash_request *req;
1223 unsigned int bufsize;
1224 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1226 LASSERT(pg_count > 0);
1228 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1230 CERROR("Unable to initialize checksum hash %s\n",
1231 cfs_crypto_hash_name(cfs_alg));
1232 return PTR_ERR(req);
1235 while (nob > 0 && pg_count > 0) {
1236 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1238 /* corrupt the data before we compute the checksum, to
1239 * simulate an OST->client data error */
1240 if (i == 0 && opc == OST_READ &&
1241 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1242 unsigned char *ptr = kmap(pga[i]->pg);
1243 int off = pga[i]->off & ~PAGE_MASK;
1245 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1248 cfs_crypto_hash_update_page(req, pga[i]->pg,
1249 pga[i]->off & ~PAGE_MASK,
1251 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1252 (int)(pga[i]->off & ~PAGE_MASK));
1254 nob -= pga[i]->count;
1259 bufsize = sizeof(*cksum);
1260 cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1262 /* For sending we only compute the wrong checksum instead
1263 * of corrupting the data so it is still correct on a redo */
1264 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1270 static int osc_checksum_bulk_rw(const char *obd_name,
1271 enum cksum_types cksum_type,
1272 int nob, size_t pg_count,
1273 struct brw_page **pga, int opc,
1276 obd_dif_csum_fn *fn = NULL;
1277 int sector_size = 0;
1281 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
1284 rc = osc_checksum_bulk_t10pi(obd_name, nob, pg_count, pga,
1285 opc, fn, sector_size, check_sum);
1287 rc = osc_checksum_bulk(nob, pg_count, pga, opc, cksum_type,
1294 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1295 u32 page_count, struct brw_page **pga,
1296 struct ptlrpc_request **reqp, int resend)
1298 struct ptlrpc_request *req;
1299 struct ptlrpc_bulk_desc *desc;
1300 struct ost_body *body;
1301 struct obd_ioobj *ioobj;
1302 struct niobuf_remote *niobuf;
1303 int niocount, i, requested_nob, opc, rc, short_io_size = 0;
1304 struct osc_brw_async_args *aa;
1305 struct req_capsule *pill;
1306 struct brw_page *pg_prev;
1308 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1311 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1312 RETURN(-ENOMEM); /* Recoverable */
1313 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1314 RETURN(-EINVAL); /* Fatal */
1316 if ((cmd & OBD_BRW_WRITE) != 0) {
1318 req = ptlrpc_request_alloc_pool(cli->cl_import,
1320 &RQF_OST_BRW_WRITE);
1323 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1328 for (niocount = i = 1; i < page_count; i++) {
1329 if (!can_merge_pages(pga[i - 1], pga[i]))
1333 pill = &req->rq_pill;
1334 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1336 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1337 niocount * sizeof(*niobuf));
1339 for (i = 0; i < page_count; i++)
1340 short_io_size += pga[i]->count;
1342 /* Check if read/write is small enough to be a short io. */
1343 if (short_io_size > cli->cl_max_short_io_bytes || niocount > 1 ||
1344 !imp_connect_shortio(cli->cl_import))
1347 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1348 opc == OST_READ ? 0 : short_io_size);
1349 if (opc == OST_READ)
1350 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1353 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1355 ptlrpc_request_free(req);
1358 osc_set_io_portal(req);
1360 ptlrpc_at_set_req_timeout(req);
1361 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1363 req->rq_no_retry_einprogress = 1;
1365 if (short_io_size != 0) {
1367 short_io_buf = NULL;
1371 desc = ptlrpc_prep_bulk_imp(req, page_count,
1372 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1373 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1374 PTLRPC_BULK_PUT_SINK) |
1375 PTLRPC_BULK_BUF_KIOV,
1377 &ptlrpc_bulk_kiov_pin_ops);
1380 GOTO(out, rc = -ENOMEM);
1381 /* NB request now owns desc and will free it when it gets freed */
1383 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1384 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1385 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1386 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1388 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1390 /* For READ and WRITE, we can't fill o_uid and o_gid using from_kuid()
1391 * and from_kgid(), because they are asynchronous. Fortunately, variable
1392 * oa contains valid o_uid and o_gid in these two operations.
1393 * Besides, filling o_uid and o_gid is enough for nrs-tbf, see LU-9658.
1394 * OBD_MD_FLUID and OBD_MD_FLUID is not set in order to avoid breaking
1395 * other process logic */
1396 body->oa.o_uid = oa->o_uid;
1397 body->oa.o_gid = oa->o_gid;
1399 obdo_to_ioobj(oa, ioobj);
1400 ioobj->ioo_bufcnt = niocount;
1401 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1402 * that might be send for this request. The actual number is decided
1403 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1404 * "max - 1" for old client compatibility sending "0", and also so the
1405 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1407 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1409 ioobj_max_brw_set(ioobj, 0);
1411 if (short_io_size != 0) {
1412 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1413 body->oa.o_valid |= OBD_MD_FLFLAGS;
1414 body->oa.o_flags = 0;
1416 body->oa.o_flags |= OBD_FL_SHORT_IO;
1417 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1419 if (opc == OST_WRITE) {
1420 short_io_buf = req_capsule_client_get(pill,
1422 LASSERT(short_io_buf != NULL);
1426 LASSERT(page_count > 0);
1428 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1429 struct brw_page *pg = pga[i];
1430 int poff = pg->off & ~PAGE_MASK;
1432 LASSERT(pg->count > 0);
1433 /* make sure there is no gap in the middle of page array */
1434 LASSERTF(page_count == 1 ||
1435 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1436 ergo(i > 0 && i < page_count - 1,
1437 poff == 0 && pg->count == PAGE_SIZE) &&
1438 ergo(i == page_count - 1, poff == 0)),
1439 "i: %d/%d pg: %p off: %llu, count: %u\n",
1440 i, page_count, pg, pg->off, pg->count);
1441 LASSERTF(i == 0 || pg->off > pg_prev->off,
1442 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1443 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1445 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1446 pg_prev->pg, page_private(pg_prev->pg),
1447 pg_prev->pg->index, pg_prev->off);
1448 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1449 (pg->flag & OBD_BRW_SRVLOCK));
1450 if (short_io_size != 0 && opc == OST_WRITE) {
1451 unsigned char *ptr = ll_kmap_atomic(pg->pg, KM_USER0);
1453 LASSERT(short_io_size >= requested_nob + pg->count);
1454 memcpy(short_io_buf + requested_nob,
1457 ll_kunmap_atomic(ptr, KM_USER0);
1458 } else if (short_io_size == 0) {
1459 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1462 requested_nob += pg->count;
1464 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1466 niobuf->rnb_len += pg->count;
1468 niobuf->rnb_offset = pg->off;
1469 niobuf->rnb_len = pg->count;
1470 niobuf->rnb_flags = pg->flag;
1475 LASSERTF((void *)(niobuf - niocount) ==
1476 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1477 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1478 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1480 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1482 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1483 body->oa.o_valid |= OBD_MD_FLFLAGS;
1484 body->oa.o_flags = 0;
1486 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1489 if (osc_should_shrink_grant(cli))
1490 osc_shrink_grant_local(cli, &body->oa);
1492 /* size[REQ_REC_OFF] still sizeof (*body) */
1493 if (opc == OST_WRITE) {
1494 if (cli->cl_checksum &&
1495 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1496 /* store cl_cksum_type in a local variable since
1497 * it can be changed via lprocfs */
1498 enum cksum_types cksum_type = cli->cl_cksum_type;
1500 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1501 body->oa.o_flags = 0;
1503 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1505 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1507 rc = osc_checksum_bulk_rw(obd_name, cksum_type,
1508 requested_nob, page_count,
1512 CDEBUG(D_PAGE, "failed to checksum, rc = %d\n",
1516 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1519 /* save this in 'oa', too, for later checking */
1520 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1521 oa->o_flags |= obd_cksum_type_pack(obd_name,
1524 /* clear out the checksum flag, in case this is a
1525 * resend but cl_checksum is no longer set. b=11238 */
1526 oa->o_valid &= ~OBD_MD_FLCKSUM;
1528 oa->o_cksum = body->oa.o_cksum;
1529 /* 1 RC per niobuf */
1530 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1531 sizeof(__u32) * niocount);
1533 if (cli->cl_checksum &&
1534 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1535 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1536 body->oa.o_flags = 0;
1537 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1538 cli->cl_cksum_type);
1539 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1542 /* Client cksum has been already copied to wire obdo in previous
1543 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1544 * resent due to cksum error, this will allow Server to
1545 * check+dump pages on its side */
1547 ptlrpc_request_set_replen(req);
1549 aa = ptlrpc_req_async_args(aa, req);
1551 aa->aa_requested_nob = requested_nob;
1552 aa->aa_nio_count = niocount;
1553 aa->aa_page_count = page_count;
1557 INIT_LIST_HEAD(&aa->aa_oaps);
1560 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1561 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1562 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1563 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1567 ptlrpc_req_finished(req);
1571 char dbgcksum_file_name[PATH_MAX];
1573 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1574 struct brw_page **pga, __u32 server_cksum,
1582 /* will only keep dump of pages on first error for the same range in
1583 * file/fid, not during the resends/retries. */
1584 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1585 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1586 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1587 libcfs_debug_file_path_arr :
1588 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1589 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1590 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1591 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1593 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1594 client_cksum, server_cksum);
1595 filp = filp_open(dbgcksum_file_name,
1596 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1600 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1601 "checksum error: rc = %d\n", dbgcksum_file_name,
1604 CERROR("%s: can't open to dump pages with checksum "
1605 "error: rc = %d\n", dbgcksum_file_name, rc);
1609 for (i = 0; i < page_count; i++) {
1610 len = pga[i]->count;
1611 buf = kmap(pga[i]->pg);
1613 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1615 CERROR("%s: wanted to write %u but got %d "
1616 "error\n", dbgcksum_file_name, len, rc);
1621 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1622 dbgcksum_file_name, rc);
1627 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1629 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1630 filp_close(filp, NULL);
1635 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1636 __u32 client_cksum, __u32 server_cksum,
1637 struct osc_brw_async_args *aa)
1639 const char *obd_name = aa->aa_cli->cl_import->imp_obd->obd_name;
1640 enum cksum_types cksum_type;
1641 obd_dif_csum_fn *fn = NULL;
1642 int sector_size = 0;
1647 if (server_cksum == client_cksum) {
1648 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1652 if (aa->aa_cli->cl_checksum_dump)
1653 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1654 server_cksum, client_cksum);
1656 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1659 switch (cksum_type) {
1660 case OBD_CKSUM_T10IP512:
1664 case OBD_CKSUM_T10IP4K:
1668 case OBD_CKSUM_T10CRC512:
1669 fn = obd_dif_crc_fn;
1672 case OBD_CKSUM_T10CRC4K:
1673 fn = obd_dif_crc_fn;
1681 rc = osc_checksum_bulk_t10pi(obd_name, aa->aa_requested_nob,
1682 aa->aa_page_count, aa->aa_ppga,
1683 OST_WRITE, fn, sector_size,
1686 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1687 aa->aa_ppga, OST_WRITE, cksum_type,
1691 msg = "failed to calculate the client write checksum";
1692 else if (cksum_type != obd_cksum_type_unpack(aa->aa_oa->o_flags))
1693 msg = "the server did not use the checksum type specified in "
1694 "the original request - likely a protocol problem";
1695 else if (new_cksum == server_cksum)
1696 msg = "changed on the client after we checksummed it - "
1697 "likely false positive due to mmap IO (bug 11742)";
1698 else if (new_cksum == client_cksum)
1699 msg = "changed in transit before arrival at OST";
1701 msg = "changed in transit AND doesn't match the original - "
1702 "likely false positive due to mmap IO (bug 11742)";
1704 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1705 DFID " object "DOSTID" extent [%llu-%llu], original "
1706 "client csum %x (type %x), server csum %x (type %x),"
1707 " client csum now %x\n",
1708 obd_name, msg, libcfs_nid2str(peer->nid),
1709 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1710 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1711 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1712 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1713 aa->aa_ppga[aa->aa_page_count - 1]->off +
1714 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1716 obd_cksum_type_unpack(aa->aa_oa->o_flags),
1717 server_cksum, cksum_type, new_cksum);
1721 /* Note rc enters this function as number of bytes transferred */
1722 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1724 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1725 struct client_obd *cli = aa->aa_cli;
1726 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1727 const struct lnet_process_id *peer =
1728 &req->rq_import->imp_connection->c_peer;
1729 struct ost_body *body;
1730 u32 client_cksum = 0;
1734 if (rc < 0 && rc != -EDQUOT) {
1735 DEBUG_REQ(D_INFO, req, "Failed request: rc = %d", rc);
1739 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1740 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1742 DEBUG_REQ(D_INFO, req, "cannot unpack body");
1746 /* set/clear over quota flag for a uid/gid/projid */
1747 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1748 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1749 unsigned qid[LL_MAXQUOTAS] = {
1750 body->oa.o_uid, body->oa.o_gid,
1751 body->oa.o_projid };
1753 "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1754 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1755 body->oa.o_valid, body->oa.o_flags);
1756 osc_quota_setdq(cli, req->rq_xid, qid, body->oa.o_valid,
1760 osc_update_grant(cli, body);
1765 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1766 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1768 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1770 CERROR("%s: unexpected positive size %d\n",
1775 if (req->rq_bulk != NULL &&
1776 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1779 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1780 check_write_checksum(&body->oa, peer, client_cksum,
1781 body->oa.o_cksum, aa))
1784 rc = check_write_rcs(req, aa->aa_requested_nob,
1785 aa->aa_nio_count, aa->aa_page_count,
1790 /* The rest of this function executes only for OST_READs */
1792 if (req->rq_bulk == NULL) {
1793 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1795 LASSERT(rc == req->rq_status);
1797 /* if unwrap_bulk failed, return -EAGAIN to retry */
1798 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1801 GOTO(out, rc = -EAGAIN);
1803 if (rc > aa->aa_requested_nob) {
1804 CERROR("%s: unexpected size %d, requested %d\n", obd_name,
1805 rc, aa->aa_requested_nob);
1809 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1810 CERROR("%s: unexpected size %d, transferred %d\n", obd_name,
1811 rc, req->rq_bulk->bd_nob_transferred);
1815 if (req->rq_bulk == NULL) {
1817 int nob, pg_count, i = 0;
1820 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1821 pg_count = aa->aa_page_count;
1822 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1825 while (nob > 0 && pg_count > 0) {
1827 int count = aa->aa_ppga[i]->count > nob ?
1828 nob : aa->aa_ppga[i]->count;
1830 CDEBUG(D_CACHE, "page %p count %d\n",
1831 aa->aa_ppga[i]->pg, count);
1832 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1833 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1835 ll_kunmap_atomic((void *) ptr, KM_USER0);
1844 if (rc < aa->aa_requested_nob)
1845 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1847 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1848 static int cksum_counter;
1849 u32 server_cksum = body->oa.o_cksum;
1852 enum cksum_types cksum_type;
1853 u32 o_flags = body->oa.o_valid & OBD_MD_FLFLAGS ?
1854 body->oa.o_flags : 0;
1856 cksum_type = obd_cksum_type_unpack(o_flags);
1857 rc = osc_checksum_bulk_rw(obd_name, cksum_type, rc,
1858 aa->aa_page_count, aa->aa_ppga,
1859 OST_READ, &client_cksum);
1863 if (req->rq_bulk != NULL &&
1864 peer->nid != req->rq_bulk->bd_sender) {
1866 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1869 if (server_cksum != client_cksum) {
1870 struct ost_body *clbody;
1871 u32 page_count = aa->aa_page_count;
1873 clbody = req_capsule_client_get(&req->rq_pill,
1875 if (cli->cl_checksum_dump)
1876 dump_all_bulk_pages(&clbody->oa, page_count,
1877 aa->aa_ppga, server_cksum,
1880 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1881 "%s%s%s inode "DFID" object "DOSTID
1882 " extent [%llu-%llu], client %x, "
1883 "server %x, cksum_type %x\n",
1885 libcfs_nid2str(peer->nid),
1887 clbody->oa.o_valid & OBD_MD_FLFID ?
1888 clbody->oa.o_parent_seq : 0ULL,
1889 clbody->oa.o_valid & OBD_MD_FLFID ?
1890 clbody->oa.o_parent_oid : 0,
1891 clbody->oa.o_valid & OBD_MD_FLFID ?
1892 clbody->oa.o_parent_ver : 0,
1893 POSTID(&body->oa.o_oi),
1894 aa->aa_ppga[0]->off,
1895 aa->aa_ppga[page_count-1]->off +
1896 aa->aa_ppga[page_count-1]->count - 1,
1897 client_cksum, server_cksum,
1900 aa->aa_oa->o_cksum = client_cksum;
1904 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1907 } else if (unlikely(client_cksum)) {
1908 static int cksum_missed;
1911 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1912 CERROR("%s: checksum %u requested from %s but not sent\n",
1913 obd_name, cksum_missed,
1914 libcfs_nid2str(peer->nid));
1920 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1921 aa->aa_oa, &body->oa);
1926 static int osc_brw_redo_request(struct ptlrpc_request *request,
1927 struct osc_brw_async_args *aa, int rc)
1929 struct ptlrpc_request *new_req;
1930 struct osc_brw_async_args *new_aa;
1931 struct osc_async_page *oap;
1934 /* The below message is checked in replay-ost-single.sh test_8ae*/
1935 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1936 "redo for recoverable error %d", rc);
1938 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1939 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1940 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1941 aa->aa_ppga, &new_req, 1);
1945 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1946 if (oap->oap_request != NULL) {
1947 LASSERTF(request == oap->oap_request,
1948 "request %p != oap_request %p\n",
1949 request, oap->oap_request);
1950 if (oap->oap_interrupted) {
1951 ptlrpc_req_finished(new_req);
1957 * New request takes over pga and oaps from old request.
1958 * Note that copying a list_head doesn't work, need to move it...
1961 new_req->rq_interpret_reply = request->rq_interpret_reply;
1962 new_req->rq_async_args = request->rq_async_args;
1963 new_req->rq_commit_cb = request->rq_commit_cb;
1964 /* cap resend delay to the current request timeout, this is similar to
1965 * what ptlrpc does (see after_reply()) */
1966 if (aa->aa_resends > new_req->rq_timeout)
1967 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1969 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1970 new_req->rq_generation_set = 1;
1971 new_req->rq_import_generation = request->rq_import_generation;
1973 new_aa = ptlrpc_req_async_args(new_aa, new_req);
1975 INIT_LIST_HEAD(&new_aa->aa_oaps);
1976 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1977 INIT_LIST_HEAD(&new_aa->aa_exts);
1978 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1979 new_aa->aa_resends = aa->aa_resends;
1981 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1982 if (oap->oap_request) {
1983 ptlrpc_req_finished(oap->oap_request);
1984 oap->oap_request = ptlrpc_request_addref(new_req);
1988 /* XXX: This code will run into problem if we're going to support
1989 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1990 * and wait for all of them to be finished. We should inherit request
1991 * set from old request. */
1992 ptlrpcd_add_req(new_req);
1994 DEBUG_REQ(D_INFO, new_req, "new request");
1999 * ugh, we want disk allocation on the target to happen in offset order. we'll
2000 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
2001 * fine for our small page arrays and doesn't require allocation. its an
2002 * insertion sort that swaps elements that are strides apart, shrinking the
2003 * stride down until its '1' and the array is sorted.
2005 static void sort_brw_pages(struct brw_page **array, int num)
2008 struct brw_page *tmp;
2012 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
2017 for (i = stride ; i < num ; i++) {
2020 while (j >= stride && array[j - stride]->off > tmp->off) {
2021 array[j] = array[j - stride];
2026 } while (stride > 1);
2029 static void osc_release_ppga(struct brw_page **ppga, size_t count)
2031 LASSERT(ppga != NULL);
2032 OBD_FREE(ppga, sizeof(*ppga) * count);
2035 static int brw_interpret(const struct lu_env *env,
2036 struct ptlrpc_request *req, void *args, int rc)
2038 struct osc_brw_async_args *aa = args;
2039 struct osc_extent *ext;
2040 struct osc_extent *tmp;
2041 struct client_obd *cli = aa->aa_cli;
2042 unsigned long transferred = 0;
2046 rc = osc_brw_fini_request(req, rc);
2047 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2049 * When server returns -EINPROGRESS, client should always retry
2050 * regardless of the number of times the bulk was resent already.
2052 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
2053 if (req->rq_import_generation !=
2054 req->rq_import->imp_generation) {
2055 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2056 ""DOSTID", rc = %d.\n",
2057 req->rq_import->imp_obd->obd_name,
2058 POSTID(&aa->aa_oa->o_oi), rc);
2059 } else if (rc == -EINPROGRESS ||
2060 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2061 rc = osc_brw_redo_request(req, aa, rc);
2063 CERROR("%s: too many resent retries for object: "
2064 "%llu:%llu, rc = %d.\n",
2065 req->rq_import->imp_obd->obd_name,
2066 POSTID(&aa->aa_oa->o_oi), rc);
2071 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2076 struct obdo *oa = aa->aa_oa;
2077 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
2078 unsigned long valid = 0;
2079 struct cl_object *obj;
2080 struct osc_async_page *last;
2082 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
2083 obj = osc2cl(last->oap_obj);
2085 cl_object_attr_lock(obj);
2086 if (oa->o_valid & OBD_MD_FLBLOCKS) {
2087 attr->cat_blocks = oa->o_blocks;
2088 valid |= CAT_BLOCKS;
2090 if (oa->o_valid & OBD_MD_FLMTIME) {
2091 attr->cat_mtime = oa->o_mtime;
2094 if (oa->o_valid & OBD_MD_FLATIME) {
2095 attr->cat_atime = oa->o_atime;
2098 if (oa->o_valid & OBD_MD_FLCTIME) {
2099 attr->cat_ctime = oa->o_ctime;
2103 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2104 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
2105 loff_t last_off = last->oap_count + last->oap_obj_off +
2108 /* Change file size if this is an out of quota or
2109 * direct IO write and it extends the file size */
2110 if (loi->loi_lvb.lvb_size < last_off) {
2111 attr->cat_size = last_off;
2114 /* Extend KMS if it's not a lockless write */
2115 if (loi->loi_kms < last_off &&
2116 oap2osc_page(last)->ops_srvlock == 0) {
2117 attr->cat_kms = last_off;
2123 cl_object_attr_update(env, obj, attr, valid);
2124 cl_object_attr_unlock(obj);
2126 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
2129 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
2130 osc_inc_unstable_pages(req);
2132 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
2133 list_del_init(&ext->oe_link);
2134 osc_extent_finish(env, ext, 1,
2135 rc && req->rq_no_delay ? -EWOULDBLOCK : rc);
2137 LASSERT(list_empty(&aa->aa_exts));
2138 LASSERT(list_empty(&aa->aa_oaps));
2140 transferred = (req->rq_bulk == NULL ? /* short io */
2141 aa->aa_requested_nob :
2142 req->rq_bulk->bd_nob_transferred);
2144 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2145 ptlrpc_lprocfs_brw(req, transferred);
2147 spin_lock(&cli->cl_loi_list_lock);
2148 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2149 * is called so we know whether to go to sync BRWs or wait for more
2150 * RPCs to complete */
2151 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2152 cli->cl_w_in_flight--;
2154 cli->cl_r_in_flight--;
2155 osc_wake_cache_waiters(cli);
2156 spin_unlock(&cli->cl_loi_list_lock);
2158 osc_io_unplug(env, cli, NULL);
2162 static void brw_commit(struct ptlrpc_request *req)
2164 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
2165 * this called via the rq_commit_cb, I need to ensure
2166 * osc_dec_unstable_pages is still called. Otherwise unstable
2167 * pages may be leaked. */
2168 spin_lock(&req->rq_lock);
2169 if (likely(req->rq_unstable)) {
2170 req->rq_unstable = 0;
2171 spin_unlock(&req->rq_lock);
2173 osc_dec_unstable_pages(req);
2175 req->rq_committed = 1;
2176 spin_unlock(&req->rq_lock);
2181 * Build an RPC by the list of extent @ext_list. The caller must ensure
2182 * that the total pages in this list are NOT over max pages per RPC.
2183 * Extents in the list must be in OES_RPC state.
2185 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
2186 struct list_head *ext_list, int cmd)
2188 struct ptlrpc_request *req = NULL;
2189 struct osc_extent *ext;
2190 struct brw_page **pga = NULL;
2191 struct osc_brw_async_args *aa = NULL;
2192 struct obdo *oa = NULL;
2193 struct osc_async_page *oap;
2194 struct osc_object *obj = NULL;
2195 struct cl_req_attr *crattr = NULL;
2196 loff_t starting_offset = OBD_OBJECT_EOF;
2197 loff_t ending_offset = 0;
2201 bool soft_sync = false;
2202 bool interrupted = false;
2203 bool ndelay = false;
2207 __u32 layout_version = 0;
2208 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
2209 struct ost_body *body;
2211 LASSERT(!list_empty(ext_list));
2213 /* add pages into rpc_list to build BRW rpc */
2214 list_for_each_entry(ext, ext_list, oe_link) {
2215 LASSERT(ext->oe_state == OES_RPC);
2216 mem_tight |= ext->oe_memalloc;
2217 grant += ext->oe_grants;
2218 page_count += ext->oe_nr_pages;
2219 layout_version = MAX(layout_version, ext->oe_layout_version);
2224 soft_sync = osc_over_unstable_soft_limit(cli);
2226 mpflag = cfs_memory_pressure_get_and_set();
2228 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2230 GOTO(out, rc = -ENOMEM);
2232 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2234 GOTO(out, rc = -ENOMEM);
2237 list_for_each_entry(ext, ext_list, oe_link) {
2238 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
2240 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2242 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
2243 pga[i] = &oap->oap_brw_page;
2244 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2247 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2248 if (starting_offset == OBD_OBJECT_EOF ||
2249 starting_offset > oap->oap_obj_off)
2250 starting_offset = oap->oap_obj_off;
2252 LASSERT(oap->oap_page_off == 0);
2253 if (ending_offset < oap->oap_obj_off + oap->oap_count)
2254 ending_offset = oap->oap_obj_off +
2257 LASSERT(oap->oap_page_off + oap->oap_count ==
2259 if (oap->oap_interrupted)
2266 /* first page in the list */
2267 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
2269 crattr = &osc_env_info(env)->oti_req_attr;
2270 memset(crattr, 0, sizeof(*crattr));
2271 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2272 crattr->cra_flags = ~0ULL;
2273 crattr->cra_page = oap2cl_page(oap);
2274 crattr->cra_oa = oa;
2275 cl_req_attr_set(env, osc2cl(obj), crattr);
2277 if (cmd == OBD_BRW_WRITE) {
2278 oa->o_grant_used = grant;
2279 if (layout_version > 0) {
2280 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2281 PFID(&oa->o_oi.oi_fid), layout_version);
2283 oa->o_layout_version = layout_version;
2284 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2288 sort_brw_pages(pga, page_count);
2289 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2291 CERROR("prep_req failed: %d\n", rc);
2295 req->rq_commit_cb = brw_commit;
2296 req->rq_interpret_reply = brw_interpret;
2297 req->rq_memalloc = mem_tight != 0;
2298 oap->oap_request = ptlrpc_request_addref(req);
2299 if (interrupted && !req->rq_intr)
2300 ptlrpc_mark_interrupted(req);
2302 req->rq_no_resend = req->rq_no_delay = 1;
2303 /* probably set a shorter timeout value.
2304 * to handle ETIMEDOUT in brw_interpret() correctly. */
2305 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2308 /* Need to update the timestamps after the request is built in case
2309 * we race with setattr (locally or in queue at OST). If OST gets
2310 * later setattr before earlier BRW (as determined by the request xid),
2311 * the OST will not use BRW timestamps. Sadly, there is no obvious
2312 * way to do this in a single call. bug 10150 */
2313 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2314 crattr->cra_oa = &body->oa;
2315 crattr->cra_flags = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2316 cl_req_attr_set(env, osc2cl(obj), crattr);
2317 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2319 aa = ptlrpc_req_async_args(aa, req);
2320 INIT_LIST_HEAD(&aa->aa_oaps);
2321 list_splice_init(&rpc_list, &aa->aa_oaps);
2322 INIT_LIST_HEAD(&aa->aa_exts);
2323 list_splice_init(ext_list, &aa->aa_exts);
2325 spin_lock(&cli->cl_loi_list_lock);
2326 starting_offset >>= PAGE_SHIFT;
2327 if (cmd == OBD_BRW_READ) {
2328 cli->cl_r_in_flight++;
2329 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2330 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2331 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2332 starting_offset + 1);
2334 cli->cl_w_in_flight++;
2335 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2336 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2337 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2338 starting_offset + 1);
2340 spin_unlock(&cli->cl_loi_list_lock);
2342 DEBUG_REQ(D_INODE, req, "%d pages, aa %p, now %ur/%uw in flight",
2343 page_count, aa, cli->cl_r_in_flight,
2344 cli->cl_w_in_flight);
2345 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2347 ptlrpcd_add_req(req);
2353 cfs_memory_pressure_restore(mpflag);
2356 LASSERT(req == NULL);
2359 OBD_SLAB_FREE_PTR(oa, osc_obdo_kmem);
2361 OBD_FREE(pga, sizeof(*pga) * page_count);
2362 /* this should happen rarely and is pretty bad, it makes the
2363 * pending list not follow the dirty order */
2364 while (!list_empty(ext_list)) {
2365 ext = list_entry(ext_list->next, struct osc_extent,
2367 list_del_init(&ext->oe_link);
2368 osc_extent_finish(env, ext, 0, rc);
2374 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2378 LASSERT(lock != NULL);
2380 lock_res_and_lock(lock);
2382 if (lock->l_ast_data == NULL)
2383 lock->l_ast_data = data;
2384 if (lock->l_ast_data == data)
2387 unlock_res_and_lock(lock);
2392 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2393 void *cookie, struct lustre_handle *lockh,
2394 enum ldlm_mode mode, __u64 *flags, bool speculative,
2397 bool intent = *flags & LDLM_FL_HAS_INTENT;
2401 /* The request was created before ldlm_cli_enqueue call. */
2402 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2403 struct ldlm_reply *rep;
2405 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2406 LASSERT(rep != NULL);
2408 rep->lock_policy_res1 =
2409 ptlrpc_status_ntoh(rep->lock_policy_res1);
2410 if (rep->lock_policy_res1)
2411 errcode = rep->lock_policy_res1;
2413 *flags |= LDLM_FL_LVB_READY;
2414 } else if (errcode == ELDLM_OK) {
2415 *flags |= LDLM_FL_LVB_READY;
2418 /* Call the update callback. */
2419 rc = (*upcall)(cookie, lockh, errcode);
2421 /* release the reference taken in ldlm_cli_enqueue() */
2422 if (errcode == ELDLM_LOCK_MATCHED)
2424 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2425 ldlm_lock_decref(lockh, mode);
2430 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2433 struct osc_enqueue_args *aa = args;
2434 struct ldlm_lock *lock;
2435 struct lustre_handle *lockh = &aa->oa_lockh;
2436 enum ldlm_mode mode = aa->oa_mode;
2437 struct ost_lvb *lvb = aa->oa_lvb;
2438 __u32 lvb_len = sizeof(*lvb);
2443 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2445 lock = ldlm_handle2lock(lockh);
2446 LASSERTF(lock != NULL,
2447 "lockh %#llx, req %p, aa %p - client evicted?\n",
2448 lockh->cookie, req, aa);
2450 /* Take an additional reference so that a blocking AST that
2451 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2452 * to arrive after an upcall has been executed by
2453 * osc_enqueue_fini(). */
2454 ldlm_lock_addref(lockh, mode);
2456 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2457 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2459 /* Let CP AST to grant the lock first. */
2460 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2462 if (aa->oa_speculative) {
2463 LASSERT(aa->oa_lvb == NULL);
2464 LASSERT(aa->oa_flags == NULL);
2465 aa->oa_flags = &flags;
2468 /* Complete obtaining the lock procedure. */
2469 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2470 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2472 /* Complete osc stuff. */
2473 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2474 aa->oa_flags, aa->oa_speculative, rc);
2476 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2478 ldlm_lock_decref(lockh, mode);
2479 LDLM_LOCK_PUT(lock);
2483 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2485 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2486 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2487 * other synchronous requests, however keeping some locks and trying to obtain
2488 * others may take a considerable amount of time in a case of ost failure; and
2489 * when other sync requests do not get released lock from a client, the client
2490 * is evicted from the cluster -- such scenarious make the life difficult, so
2491 * release locks just after they are obtained. */
2492 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2493 __u64 *flags, union ldlm_policy_data *policy,
2494 struct ost_lvb *lvb, osc_enqueue_upcall_f upcall,
2495 void *cookie, struct ldlm_enqueue_info *einfo,
2496 struct ptlrpc_request_set *rqset, int async,
2499 struct obd_device *obd = exp->exp_obd;
2500 struct lustre_handle lockh = { 0 };
2501 struct ptlrpc_request *req = NULL;
2502 int intent = *flags & LDLM_FL_HAS_INTENT;
2503 __u64 match_flags = *flags;
2504 enum ldlm_mode mode;
2508 /* Filesystem lock extents are extended to page boundaries so that
2509 * dealing with the page cache is a little smoother. */
2510 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2511 policy->l_extent.end |= ~PAGE_MASK;
2513 /* Next, search for already existing extent locks that will cover us */
2514 /* If we're trying to read, we also search for an existing PW lock. The
2515 * VFS and page cache already protect us locally, so lots of readers/
2516 * writers can share a single PW lock.
2518 * There are problems with conversion deadlocks, so instead of
2519 * converting a read lock to a write lock, we'll just enqueue a new
2522 * At some point we should cancel the read lock instead of making them
2523 * send us a blocking callback, but there are problems with canceling
2524 * locks out from other users right now, too. */
2525 mode = einfo->ei_mode;
2526 if (einfo->ei_mode == LCK_PR)
2528 /* Normal lock requests must wait for the LVB to be ready before
2529 * matching a lock; speculative lock requests do not need to,
2530 * because they will not actually use the lock. */
2532 match_flags |= LDLM_FL_LVB_READY;
2534 match_flags |= LDLM_FL_BLOCK_GRANTED;
2535 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2536 einfo->ei_type, policy, mode, &lockh, 0);
2538 struct ldlm_lock *matched;
2540 if (*flags & LDLM_FL_TEST_LOCK)
2543 matched = ldlm_handle2lock(&lockh);
2545 /* This DLM lock request is speculative, and does not
2546 * have an associated IO request. Therefore if there
2547 * is already a DLM lock, it wll just inform the
2548 * caller to cancel the request for this stripe.*/
2549 lock_res_and_lock(matched);
2550 if (ldlm_extent_equal(&policy->l_extent,
2551 &matched->l_policy_data.l_extent))
2555 unlock_res_and_lock(matched);
2557 ldlm_lock_decref(&lockh, mode);
2558 LDLM_LOCK_PUT(matched);
2560 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2561 *flags |= LDLM_FL_LVB_READY;
2563 /* We already have a lock, and it's referenced. */
2564 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2566 ldlm_lock_decref(&lockh, mode);
2567 LDLM_LOCK_PUT(matched);
2570 ldlm_lock_decref(&lockh, mode);
2571 LDLM_LOCK_PUT(matched);
2575 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2579 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2580 &RQF_LDLM_ENQUEUE_LVB);
2584 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2586 ptlrpc_request_free(req);
2590 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2592 ptlrpc_request_set_replen(req);
2595 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2596 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2598 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2599 sizeof(*lvb), LVB_T_OST, &lockh, async);
2602 struct osc_enqueue_args *aa;
2603 aa = ptlrpc_req_async_args(aa, req);
2605 aa->oa_mode = einfo->ei_mode;
2606 aa->oa_type = einfo->ei_type;
2607 lustre_handle_copy(&aa->oa_lockh, &lockh);
2608 aa->oa_upcall = upcall;
2609 aa->oa_cookie = cookie;
2610 aa->oa_speculative = speculative;
2612 aa->oa_flags = flags;
2615 /* speculative locks are essentially to enqueue
2616 * a DLM lock in advance, so we don't care
2617 * about the result of the enqueue. */
2619 aa->oa_flags = NULL;
2622 req->rq_interpret_reply = osc_enqueue_interpret;
2623 if (rqset == PTLRPCD_SET)
2624 ptlrpcd_add_req(req);
2626 ptlrpc_set_add_req(rqset, req);
2627 } else if (intent) {
2628 ptlrpc_req_finished(req);
2633 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2634 flags, speculative, rc);
2636 ptlrpc_req_finished(req);
2641 int osc_match_base(const struct lu_env *env, struct obd_export *exp,
2642 struct ldlm_res_id *res_id, enum ldlm_type type,
2643 union ldlm_policy_data *policy, enum ldlm_mode mode,
2644 __u64 *flags, struct osc_object *obj,
2645 struct lustre_handle *lockh, int unref)
2647 struct obd_device *obd = exp->exp_obd;
2648 __u64 lflags = *flags;
2652 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2655 /* Filesystem lock extents are extended to page boundaries so that
2656 * dealing with the page cache is a little smoother */
2657 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2658 policy->l_extent.end |= ~PAGE_MASK;
2660 /* Next, search for already existing extent locks that will cover us */
2661 /* If we're trying to read, we also search for an existing PW lock. The
2662 * VFS and page cache already protect us locally, so lots of readers/
2663 * writers can share a single PW lock. */
2667 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2668 res_id, type, policy, rc, lockh, unref);
2669 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2673 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2675 LASSERT(lock != NULL);
2676 if (osc_set_lock_data(lock, obj)) {
2677 lock_res_and_lock(lock);
2678 if (!ldlm_is_lvb_cached(lock)) {
2679 LASSERT(lock->l_ast_data == obj);
2680 osc_lock_lvb_update(env, obj, lock, NULL);
2681 ldlm_set_lvb_cached(lock);
2683 unlock_res_and_lock(lock);
2685 ldlm_lock_decref(lockh, rc);
2688 LDLM_LOCK_PUT(lock);
2693 static int osc_statfs_interpret(const struct lu_env *env,
2694 struct ptlrpc_request *req, void *args, int rc)
2696 struct osc_async_args *aa = args;
2697 struct obd_statfs *msfs;
2702 * The request has in fact never been sent due to issues at
2703 * a higher level (LOV). Exit immediately since the caller
2704 * is aware of the problem and takes care of the clean up.
2708 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2709 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2715 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2717 GOTO(out, rc = -EPROTO);
2719 *aa->aa_oi->oi_osfs = *msfs;
2721 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2726 static int osc_statfs_async(struct obd_export *exp,
2727 struct obd_info *oinfo, time64_t max_age,
2728 struct ptlrpc_request_set *rqset)
2730 struct obd_device *obd = class_exp2obd(exp);
2731 struct ptlrpc_request *req;
2732 struct osc_async_args *aa;
2736 if (obd->obd_osfs_age >= max_age) {
2738 "%s: use %p cache blocks %llu/%llu objects %llu/%llu\n",
2739 obd->obd_name, &obd->obd_osfs,
2740 obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
2741 obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
2742 spin_lock(&obd->obd_osfs_lock);
2743 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
2744 spin_unlock(&obd->obd_osfs_lock);
2745 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
2746 if (oinfo->oi_cb_up)
2747 oinfo->oi_cb_up(oinfo, 0);
2752 /* We could possibly pass max_age in the request (as an absolute
2753 * timestamp or a "seconds.usec ago") so the target can avoid doing
2754 * extra calls into the filesystem if that isn't necessary (e.g.
2755 * during mount that would help a bit). Having relative timestamps
2756 * is not so great if request processing is slow, while absolute
2757 * timestamps are not ideal because they need time synchronization. */
2758 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2762 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2764 ptlrpc_request_free(req);
2767 ptlrpc_request_set_replen(req);
2768 req->rq_request_portal = OST_CREATE_PORTAL;
2769 ptlrpc_at_set_req_timeout(req);
2771 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2772 /* procfs requests not want stat in wait for avoid deadlock */
2773 req->rq_no_resend = 1;
2774 req->rq_no_delay = 1;
2777 req->rq_interpret_reply = osc_statfs_interpret;
2778 aa = ptlrpc_req_async_args(aa, req);
2781 ptlrpc_set_add_req(rqset, req);
2785 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2786 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
2788 struct obd_device *obd = class_exp2obd(exp);
2789 struct obd_statfs *msfs;
2790 struct ptlrpc_request *req;
2791 struct obd_import *imp = NULL;
2796 /*Since the request might also come from lprocfs, so we need
2797 *sync this with client_disconnect_export Bug15684*/
2798 down_read(&obd->u.cli.cl_sem);
2799 if (obd->u.cli.cl_import)
2800 imp = class_import_get(obd->u.cli.cl_import);
2801 up_read(&obd->u.cli.cl_sem);
2805 /* We could possibly pass max_age in the request (as an absolute
2806 * timestamp or a "seconds.usec ago") so the target can avoid doing
2807 * extra calls into the filesystem if that isn't necessary (e.g.
2808 * during mount that would help a bit). Having relative timestamps
2809 * is not so great if request processing is slow, while absolute
2810 * timestamps are not ideal because they need time synchronization. */
2811 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2813 class_import_put(imp);
2818 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2820 ptlrpc_request_free(req);
2823 ptlrpc_request_set_replen(req);
2824 req->rq_request_portal = OST_CREATE_PORTAL;
2825 ptlrpc_at_set_req_timeout(req);
2827 if (flags & OBD_STATFS_NODELAY) {
2828 /* procfs requests not want stat in wait for avoid deadlock */
2829 req->rq_no_resend = 1;
2830 req->rq_no_delay = 1;
2833 rc = ptlrpc_queue_wait(req);
2837 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2839 GOTO(out, rc = -EPROTO);
2845 ptlrpc_req_finished(req);
2849 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2850 void *karg, void __user *uarg)
2852 struct obd_device *obd = exp->exp_obd;
2853 struct obd_ioctl_data *data = karg;
2857 if (!try_module_get(THIS_MODULE)) {
2858 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2859 module_name(THIS_MODULE));
2863 case OBD_IOC_CLIENT_RECOVER:
2864 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
2865 data->ioc_inlbuf1, 0);
2869 case IOC_OSC_SET_ACTIVE:
2870 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
2875 CDEBUG(D_INODE, "%s: unrecognised ioctl %#x by %s: rc = %d\n",
2876 obd->obd_name, cmd, current_comm(), rc);
2880 module_put(THIS_MODULE);
2884 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2885 u32 keylen, void *key, u32 vallen, void *val,
2886 struct ptlrpc_request_set *set)
2888 struct ptlrpc_request *req;
2889 struct obd_device *obd = exp->exp_obd;
2890 struct obd_import *imp = class_exp2cliimp(exp);
2895 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2897 if (KEY_IS(KEY_CHECKSUM)) {
2898 if (vallen != sizeof(int))
2900 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2904 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2905 sptlrpc_conf_client_adapt(obd);
2909 if (KEY_IS(KEY_FLUSH_CTX)) {
2910 sptlrpc_import_flush_my_ctx(imp);
2914 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2915 struct client_obd *cli = &obd->u.cli;
2916 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2917 long target = *(long *)val;
2919 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2924 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2927 /* We pass all other commands directly to OST. Since nobody calls osc
2928 methods directly and everybody is supposed to go through LOV, we
2929 assume lov checked invalid values for us.
2930 The only recognised values so far are evict_by_nid and mds_conn.
2931 Even if something bad goes through, we'd get a -EINVAL from OST
2934 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2935 &RQF_OST_SET_GRANT_INFO :
2940 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2941 RCL_CLIENT, keylen);
2942 if (!KEY_IS(KEY_GRANT_SHRINK))
2943 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2944 RCL_CLIENT, vallen);
2945 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2947 ptlrpc_request_free(req);
2951 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2952 memcpy(tmp, key, keylen);
2953 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2956 memcpy(tmp, val, vallen);
2958 if (KEY_IS(KEY_GRANT_SHRINK)) {
2959 struct osc_grant_args *aa;
2962 aa = ptlrpc_req_async_args(aa, req);
2963 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2965 ptlrpc_req_finished(req);
2968 *oa = ((struct ost_body *)val)->oa;
2970 req->rq_interpret_reply = osc_shrink_grant_interpret;
2973 ptlrpc_request_set_replen(req);
2974 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2975 LASSERT(set != NULL);
2976 ptlrpc_set_add_req(set, req);
2977 ptlrpc_check_set(NULL, set);
2979 ptlrpcd_add_req(req);
2984 EXPORT_SYMBOL(osc_set_info_async);
2986 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
2987 struct obd_device *obd, struct obd_uuid *cluuid,
2988 struct obd_connect_data *data, void *localdata)
2990 struct client_obd *cli = &obd->u.cli;
2992 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2996 spin_lock(&cli->cl_loi_list_lock);
2997 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2998 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM) {
2999 /* restore ocd_grant_blkbits as client page bits */
3000 data->ocd_grant_blkbits = PAGE_SHIFT;
3001 grant += cli->cl_dirty_grant;
3003 grant += cli->cl_dirty_pages << PAGE_SHIFT;
3005 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
3006 lost_grant = cli->cl_lost_grant;
3007 cli->cl_lost_grant = 0;
3008 spin_unlock(&cli->cl_loi_list_lock);
3010 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
3011 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
3012 data->ocd_version, data->ocd_grant, lost_grant);
3017 EXPORT_SYMBOL(osc_reconnect);
3019 int osc_disconnect(struct obd_export *exp)
3021 struct obd_device *obd = class_exp2obd(exp);
3024 rc = client_disconnect_export(exp);
3026 * Initially we put del_shrink_grant before disconnect_export, but it
3027 * causes the following problem if setup (connect) and cleanup
3028 * (disconnect) are tangled together.
3029 * connect p1 disconnect p2
3030 * ptlrpc_connect_import
3031 * ............... class_manual_cleanup
3034 * ptlrpc_connect_interrupt
3036 * add this client to shrink list
3038 * Bang! grant shrink thread trigger the shrink. BUG18662
3040 osc_del_grant_list(&obd->u.cli);
3043 EXPORT_SYMBOL(osc_disconnect);
3045 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
3046 struct hlist_node *hnode, void *arg)
3048 struct lu_env *env = arg;
3049 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
3050 struct ldlm_lock *lock;
3051 struct osc_object *osc = NULL;
3055 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
3056 if (lock->l_ast_data != NULL && osc == NULL) {
3057 osc = lock->l_ast_data;
3058 cl_object_get(osc2cl(osc));
3061 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
3062 * by the 2nd round of ldlm_namespace_clean() call in
3063 * osc_import_event(). */
3064 ldlm_clear_cleaned(lock);
3069 osc_object_invalidate(env, osc);
3070 cl_object_put(env, osc2cl(osc));
3075 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
3077 static int osc_import_event(struct obd_device *obd,
3078 struct obd_import *imp,
3079 enum obd_import_event event)
3081 struct client_obd *cli;
3085 LASSERT(imp->imp_obd == obd);
3088 case IMP_EVENT_DISCON: {
3090 spin_lock(&cli->cl_loi_list_lock);
3091 cli->cl_avail_grant = 0;
3092 cli->cl_lost_grant = 0;
3093 spin_unlock(&cli->cl_loi_list_lock);
3096 case IMP_EVENT_INACTIVE: {
3097 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
3100 case IMP_EVENT_INVALIDATE: {
3101 struct ldlm_namespace *ns = obd->obd_namespace;
3105 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3107 env = cl_env_get(&refcheck);
3109 osc_io_unplug(env, &obd->u.cli, NULL);
3111 cfs_hash_for_each_nolock(ns->ns_rs_hash,
3112 osc_ldlm_resource_invalidate,
3114 cl_env_put(env, &refcheck);
3116 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3121 case IMP_EVENT_ACTIVE: {
3122 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
3125 case IMP_EVENT_OCD: {
3126 struct obd_connect_data *ocd = &imp->imp_connect_data;
3128 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3129 osc_init_grant(&obd->u.cli, ocd);
3132 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3133 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3135 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
3138 case IMP_EVENT_DEACTIVATE: {
3139 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
3142 case IMP_EVENT_ACTIVATE: {
3143 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
3147 CERROR("Unknown import event %d\n", event);
3154 * Determine whether the lock can be canceled before replaying the lock
3155 * during recovery, see bug16774 for detailed information.
3157 * \retval zero the lock can't be canceled
3158 * \retval other ok to cancel
3160 static int osc_cancel_weight(struct ldlm_lock *lock)
3163 * Cancel all unused and granted extent lock.
3165 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3166 ldlm_is_granted(lock) &&
3167 osc_ldlm_weigh_ast(lock) == 0)
3173 static int brw_queue_work(const struct lu_env *env, void *data)
3175 struct client_obd *cli = data;
3177 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3179 osc_io_unplug(env, cli, NULL);
3183 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
3185 struct client_obd *cli = &obd->u.cli;
3191 rc = ptlrpcd_addref();
3195 rc = client_obd_setup(obd, lcfg);
3197 GOTO(out_ptlrpcd, rc);
3200 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3201 if (IS_ERR(handler))
3202 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3203 cli->cl_writeback_work = handler;
3205 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3206 if (IS_ERR(handler))
3207 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3208 cli->cl_lru_work = handler;
3210 rc = osc_quota_setup(obd);
3212 GOTO(out_ptlrpcd_work, rc);
3214 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3215 osc_update_next_shrink(cli);
3220 if (cli->cl_writeback_work != NULL) {
3221 ptlrpcd_destroy_work(cli->cl_writeback_work);
3222 cli->cl_writeback_work = NULL;
3224 if (cli->cl_lru_work != NULL) {
3225 ptlrpcd_destroy_work(cli->cl_lru_work);
3226 cli->cl_lru_work = NULL;
3228 client_obd_cleanup(obd);
3233 EXPORT_SYMBOL(osc_setup_common);
3235 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3237 struct client_obd *cli = &obd->u.cli;
3245 rc = osc_setup_common(obd, lcfg);
3249 rc = osc_tunables_init(obd);
3254 * We try to control the total number of requests with a upper limit
3255 * osc_reqpool_maxreqcount. There might be some race which will cause
3256 * over-limit allocation, but it is fine.
3258 req_count = atomic_read(&osc_pool_req_count);
3259 if (req_count < osc_reqpool_maxreqcount) {
3260 adding = cli->cl_max_rpcs_in_flight + 2;
3261 if (req_count + adding > osc_reqpool_maxreqcount)
3262 adding = osc_reqpool_maxreqcount - req_count;
3264 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3265 atomic_add(added, &osc_pool_req_count);
3268 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3270 spin_lock(&osc_shrink_lock);
3271 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3272 spin_unlock(&osc_shrink_lock);
3273 cli->cl_import->imp_idle_timeout = osc_idle_timeout;
3274 cli->cl_import->imp_idle_debug = D_HA;
3279 int osc_precleanup_common(struct obd_device *obd)
3281 struct client_obd *cli = &obd->u.cli;
3285 * for echo client, export may be on zombie list, wait for
3286 * zombie thread to cull it, because cli.cl_import will be
3287 * cleared in client_disconnect_export():
3288 * class_export_destroy() -> obd_cleanup() ->
3289 * echo_device_free() -> echo_client_cleanup() ->
3290 * obd_disconnect() -> osc_disconnect() ->
3291 * client_disconnect_export()
3293 obd_zombie_barrier();
3294 if (cli->cl_writeback_work) {
3295 ptlrpcd_destroy_work(cli->cl_writeback_work);
3296 cli->cl_writeback_work = NULL;
3299 if (cli->cl_lru_work) {
3300 ptlrpcd_destroy_work(cli->cl_lru_work);
3301 cli->cl_lru_work = NULL;
3304 obd_cleanup_client_import(obd);
3307 EXPORT_SYMBOL(osc_precleanup_common);
3309 static int osc_precleanup(struct obd_device *obd)
3313 osc_precleanup_common(obd);
3315 ptlrpc_lprocfs_unregister_obd(obd);
3319 int osc_cleanup_common(struct obd_device *obd)
3321 struct client_obd *cli = &obd->u.cli;
3326 spin_lock(&osc_shrink_lock);
3327 list_del(&cli->cl_shrink_list);
3328 spin_unlock(&osc_shrink_lock);
3331 if (cli->cl_cache != NULL) {
3332 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3333 spin_lock(&cli->cl_cache->ccc_lru_lock);
3334 list_del_init(&cli->cl_lru_osc);
3335 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3336 cli->cl_lru_left = NULL;
3337 cl_cache_decref(cli->cl_cache);
3338 cli->cl_cache = NULL;
3341 /* free memory of osc quota cache */
3342 osc_quota_cleanup(obd);
3344 rc = client_obd_cleanup(obd);
3349 EXPORT_SYMBOL(osc_cleanup_common);
3351 static struct obd_ops osc_obd_ops = {
3352 .o_owner = THIS_MODULE,
3353 .o_setup = osc_setup,
3354 .o_precleanup = osc_precleanup,
3355 .o_cleanup = osc_cleanup_common,
3356 .o_add_conn = client_import_add_conn,
3357 .o_del_conn = client_import_del_conn,
3358 .o_connect = client_connect_import,
3359 .o_reconnect = osc_reconnect,
3360 .o_disconnect = osc_disconnect,
3361 .o_statfs = osc_statfs,
3362 .o_statfs_async = osc_statfs_async,
3363 .o_create = osc_create,
3364 .o_destroy = osc_destroy,
3365 .o_getattr = osc_getattr,
3366 .o_setattr = osc_setattr,
3367 .o_iocontrol = osc_iocontrol,
3368 .o_set_info_async = osc_set_info_async,
3369 .o_import_event = osc_import_event,
3370 .o_quotactl = osc_quotactl,
3373 static struct shrinker *osc_cache_shrinker;
3374 struct list_head osc_shrink_list = LIST_HEAD_INIT(osc_shrink_list);
3375 DEFINE_SPINLOCK(osc_shrink_lock);
3377 #ifndef HAVE_SHRINKER_COUNT
3378 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3380 struct shrink_control scv = {
3381 .nr_to_scan = shrink_param(sc, nr_to_scan),
3382 .gfp_mask = shrink_param(sc, gfp_mask)
3384 #if !defined(HAVE_SHRINKER_WANT_SHRINK_PTR) && !defined(HAVE_SHRINK_CONTROL)
3385 struct shrinker *shrinker = NULL;
3388 (void)osc_cache_shrink_scan(shrinker, &scv);
3390 return osc_cache_shrink_count(shrinker, &scv);
3394 static int __init osc_init(void)
3396 unsigned int reqpool_size;
3397 unsigned int reqsize;
3399 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3400 osc_cache_shrink_count, osc_cache_shrink_scan);
3403 /* print an address of _any_ initialized kernel symbol from this
3404 * module, to allow debugging with gdb that doesn't support data
3405 * symbols from modules.*/
3406 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3408 rc = lu_kmem_init(osc_caches);
3412 rc = class_register_type(&osc_obd_ops, NULL, true, NULL,
3413 LUSTRE_OSC_NAME, &osc_device_type);
3417 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3419 /* This is obviously too much memory, only prevent overflow here */
3420 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3421 GOTO(out_type, rc = -EINVAL);
3423 reqpool_size = osc_reqpool_mem_max << 20;
3426 while (reqsize < OST_IO_MAXREQSIZE)
3427 reqsize = reqsize << 1;
3430 * We don't enlarge the request count in OSC pool according to
3431 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3432 * tried after normal allocation failed. So a small OSC pool won't
3433 * cause much performance degression in most of cases.
3435 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3437 atomic_set(&osc_pool_req_count, 0);
3438 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3439 ptlrpc_add_rqs_to_pool);
3441 if (osc_rq_pool == NULL)
3442 GOTO(out_type, rc = -ENOMEM);
3444 rc = osc_start_grant_work();
3446 GOTO(out_req_pool, rc);
3451 ptlrpc_free_rq_pool(osc_rq_pool);
3453 class_unregister_type(LUSTRE_OSC_NAME);
3455 lu_kmem_fini(osc_caches);
3460 static void __exit osc_exit(void)
3462 osc_stop_grant_work();
3463 remove_shrinker(osc_cache_shrinker);
3464 class_unregister_type(LUSTRE_OSC_NAME);
3465 lu_kmem_fini(osc_caches);
3466 ptlrpc_free_rq_pool(osc_rq_pool);
3469 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3470 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3471 MODULE_VERSION(LUSTRE_VERSION_STRING);
3472 MODULE_LICENSE("GPL");
3474 module_init(osc_init);
3475 module_exit(osc_exit);