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);
758 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
760 spin_lock(&cli->cl_loi_list_lock);
761 oa->o_grant = cli->cl_avail_grant / 4;
762 cli->cl_avail_grant -= oa->o_grant;
763 spin_unlock(&cli->cl_loi_list_lock);
764 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
765 oa->o_valid |= OBD_MD_FLFLAGS;
768 oa->o_flags |= OBD_FL_SHRINK_GRANT;
769 osc_update_next_shrink(cli);
772 /* Shrink the current grant, either from some large amount to enough for a
773 * full set of in-flight RPCs, or if we have already shrunk to that limit
774 * then to enough for a single RPC. This avoids keeping more grant than
775 * needed, and avoids shrinking the grant piecemeal. */
776 static int osc_shrink_grant(struct client_obd *cli)
778 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
779 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
781 spin_lock(&cli->cl_loi_list_lock);
782 if (cli->cl_avail_grant <= target_bytes)
783 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
784 spin_unlock(&cli->cl_loi_list_lock);
786 return osc_shrink_grant_to_target(cli, target_bytes);
789 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
792 struct ost_body *body;
795 spin_lock(&cli->cl_loi_list_lock);
796 /* Don't shrink if we are already above or below the desired limit
797 * We don't want to shrink below a single RPC, as that will negatively
798 * impact block allocation and long-term performance. */
799 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
800 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
802 if (target_bytes >= cli->cl_avail_grant) {
803 spin_unlock(&cli->cl_loi_list_lock);
806 spin_unlock(&cli->cl_loi_list_lock);
812 osc_announce_cached(cli, &body->oa, 0);
814 spin_lock(&cli->cl_loi_list_lock);
815 if (target_bytes >= cli->cl_avail_grant) {
816 /* available grant has changed since target calculation */
817 spin_unlock(&cli->cl_loi_list_lock);
818 GOTO(out_free, rc = 0);
820 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
821 cli->cl_avail_grant = target_bytes;
822 spin_unlock(&cli->cl_loi_list_lock);
823 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
824 body->oa.o_valid |= OBD_MD_FLFLAGS;
825 body->oa.o_flags = 0;
827 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
828 osc_update_next_shrink(cli);
830 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
831 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
832 sizeof(*body), body, NULL);
834 __osc_update_grant(cli, body->oa.o_grant);
840 static int osc_should_shrink_grant(struct client_obd *client)
842 time64_t next_shrink = client->cl_next_shrink_grant;
844 if (client->cl_import == NULL)
847 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
848 OBD_CONNECT_GRANT_SHRINK) == 0)
851 if (ktime_get_seconds() >= next_shrink - 5) {
852 /* Get the current RPC size directly, instead of going via:
853 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
854 * Keep comment here so that it can be found by searching. */
855 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
857 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
858 client->cl_avail_grant > brw_size)
861 osc_update_next_shrink(client);
866 #define GRANT_SHRINK_RPC_BATCH 100
868 static struct delayed_work work;
870 static void osc_grant_work_handler(struct work_struct *data)
872 struct client_obd *cli;
874 bool init_next_shrink = true;
875 time64_t next_shrink = ktime_get_seconds() + GRANT_SHRINK_INTERVAL;
878 mutex_lock(&client_gtd.gtd_mutex);
879 list_for_each_entry(cli, &client_gtd.gtd_clients,
881 if (rpc_sent < GRANT_SHRINK_RPC_BATCH &&
882 osc_should_shrink_grant(cli)) {
883 osc_shrink_grant(cli);
887 if (!init_next_shrink) {
888 if (cli->cl_next_shrink_grant < next_shrink &&
889 cli->cl_next_shrink_grant > ktime_get_seconds())
890 next_shrink = cli->cl_next_shrink_grant;
892 init_next_shrink = false;
893 next_shrink = cli->cl_next_shrink_grant;
896 mutex_unlock(&client_gtd.gtd_mutex);
898 if (client_gtd.gtd_stopped == 1)
901 if (next_shrink > ktime_get_seconds()) {
902 time64_t delay = next_shrink - ktime_get_seconds();
904 schedule_delayed_work(&work, cfs_time_seconds(delay));
906 schedule_work(&work.work);
910 void osc_schedule_grant_work(void)
912 cancel_delayed_work_sync(&work);
913 schedule_work(&work.work);
917 * Start grant thread for returing grant to server for idle clients.
919 static int osc_start_grant_work(void)
921 client_gtd.gtd_stopped = 0;
922 mutex_init(&client_gtd.gtd_mutex);
923 INIT_LIST_HEAD(&client_gtd.gtd_clients);
925 INIT_DELAYED_WORK(&work, osc_grant_work_handler);
926 schedule_work(&work.work);
931 static void osc_stop_grant_work(void)
933 client_gtd.gtd_stopped = 1;
934 cancel_delayed_work_sync(&work);
937 static void osc_add_grant_list(struct client_obd *client)
939 mutex_lock(&client_gtd.gtd_mutex);
940 list_add(&client->cl_grant_chain, &client_gtd.gtd_clients);
941 mutex_unlock(&client_gtd.gtd_mutex);
944 static void osc_del_grant_list(struct client_obd *client)
946 if (list_empty(&client->cl_grant_chain))
949 mutex_lock(&client_gtd.gtd_mutex);
950 list_del_init(&client->cl_grant_chain);
951 mutex_unlock(&client_gtd.gtd_mutex);
954 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
957 * ocd_grant is the total grant amount we're expect to hold: if we've
958 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
959 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
962 * race is tolerable here: if we're evicted, but imp_state already
963 * left EVICTED state, then cl_dirty_pages must be 0 already.
965 spin_lock(&cli->cl_loi_list_lock);
966 cli->cl_avail_grant = ocd->ocd_grant;
967 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
968 cli->cl_avail_grant -= cli->cl_reserved_grant;
969 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
970 cli->cl_avail_grant -= cli->cl_dirty_grant;
972 cli->cl_avail_grant -=
973 cli->cl_dirty_pages << PAGE_SHIFT;
976 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
980 /* overhead for each extent insertion */
981 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
982 /* determine the appropriate chunk size used by osc_extent. */
983 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
984 ocd->ocd_grant_blkbits);
985 /* max_pages_per_rpc must be chunk aligned */
986 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
987 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
988 ~chunk_mask) & chunk_mask;
989 /* determine maximum extent size, in #pages */
990 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
991 cli->cl_max_extent_pages = size >> PAGE_SHIFT;
992 if (cli->cl_max_extent_pages == 0)
993 cli->cl_max_extent_pages = 1;
995 cli->cl_grant_extent_tax = 0;
996 cli->cl_chunkbits = PAGE_SHIFT;
997 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
999 spin_unlock(&cli->cl_loi_list_lock);
1001 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
1002 "chunk bits: %d cl_max_extent_pages: %d\n",
1004 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
1005 cli->cl_max_extent_pages);
1007 if (OCD_HAS_FLAG(ocd, GRANT_SHRINK) && list_empty(&cli->cl_grant_chain))
1008 osc_add_grant_list(cli);
1010 EXPORT_SYMBOL(osc_init_grant);
1012 /* We assume that the reason this OSC got a short read is because it read
1013 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1014 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1015 * this stripe never got written at or beyond this stripe offset yet. */
1016 static void handle_short_read(int nob_read, size_t page_count,
1017 struct brw_page **pga)
1022 /* skip bytes read OK */
1023 while (nob_read > 0) {
1024 LASSERT (page_count > 0);
1026 if (pga[i]->count > nob_read) {
1027 /* EOF inside this page */
1028 ptr = kmap(pga[i]->pg) +
1029 (pga[i]->off & ~PAGE_MASK);
1030 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1037 nob_read -= pga[i]->count;
1042 /* zero remaining pages */
1043 while (page_count-- > 0) {
1044 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
1045 memset(ptr, 0, pga[i]->count);
1051 static int check_write_rcs(struct ptlrpc_request *req,
1052 int requested_nob, int niocount,
1053 size_t page_count, struct brw_page **pga)
1058 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1059 sizeof(*remote_rcs) *
1061 if (remote_rcs == NULL) {
1062 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1066 /* return error if any niobuf was in error */
1067 for (i = 0; i < niocount; i++) {
1068 if ((int)remote_rcs[i] < 0) {
1069 CDEBUG(D_INFO, "rc[%d]: %d req %p\n",
1070 i, remote_rcs[i], req);
1071 return remote_rcs[i];
1074 if (remote_rcs[i] != 0) {
1075 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1076 i, remote_rcs[i], req);
1080 if (req->rq_bulk != NULL &&
1081 req->rq_bulk->bd_nob_transferred != requested_nob) {
1082 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1083 req->rq_bulk->bd_nob_transferred, requested_nob);
1090 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1092 if (p1->flag != p2->flag) {
1093 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1094 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1095 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1097 /* warn if we try to combine flags that we don't know to be
1098 * safe to combine */
1099 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1100 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1101 "report this at https://jira.whamcloud.com/\n",
1102 p1->flag, p2->flag);
1107 return (p1->off + p1->count == p2->off);
1110 #if IS_ENABLED(CONFIG_CRC_T10DIF)
1111 static int osc_checksum_bulk_t10pi(const char *obd_name, int nob,
1112 size_t pg_count, struct brw_page **pga,
1113 int opc, obd_dif_csum_fn *fn,
1117 struct ahash_request *req;
1118 /* Used Adler as the default checksum type on top of DIF tags */
1119 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1120 struct page *__page;
1121 unsigned char *buffer;
1123 unsigned int bufsize;
1125 int used_number = 0;
1131 LASSERT(pg_count > 0);
1133 __page = alloc_page(GFP_KERNEL);
1137 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1140 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
1141 obd_name, cfs_crypto_hash_name(cfs_alg), rc);
1145 buffer = kmap(__page);
1146 guard_start = (__u16 *)buffer;
1147 guard_number = PAGE_SIZE / sizeof(*guard_start);
1148 while (nob > 0 && pg_count > 0) {
1149 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1151 /* corrupt the data before we compute the checksum, to
1152 * simulate an OST->client data error */
1153 if (unlikely(i == 0 && opc == OST_READ &&
1154 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))) {
1155 unsigned char *ptr = kmap(pga[i]->pg);
1156 int off = pga[i]->off & ~PAGE_MASK;
1158 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1163 * The left guard number should be able to hold checksums of a
1166 rc = obd_page_dif_generate_buffer(obd_name, pga[i]->pg,
1167 pga[i]->off & ~PAGE_MASK,
1169 guard_start + used_number,
1170 guard_number - used_number,
1176 used_number += used;
1177 if (used_number == guard_number) {
1178 cfs_crypto_hash_update_page(req, __page, 0,
1179 used_number * sizeof(*guard_start));
1183 nob -= pga[i]->count;
1191 if (used_number != 0)
1192 cfs_crypto_hash_update_page(req, __page, 0,
1193 used_number * sizeof(*guard_start));
1195 bufsize = sizeof(cksum);
1196 cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
1198 /* For sending we only compute the wrong checksum instead
1199 * of corrupting the data so it is still correct on a redo */
1200 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1205 __free_page(__page);
1208 #else /* !CONFIG_CRC_T10DIF */
1209 #define obd_dif_ip_fn NULL
1210 #define obd_dif_crc_fn NULL
1211 #define osc_checksum_bulk_t10pi(name, nob, pgc, pga, opc, fn, ssize, csum) \
1213 #endif /* CONFIG_CRC_T10DIF */
1215 static int osc_checksum_bulk(int nob, size_t pg_count,
1216 struct brw_page **pga, int opc,
1217 enum cksum_types cksum_type,
1221 struct ahash_request *req;
1222 unsigned int bufsize;
1223 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1225 LASSERT(pg_count > 0);
1227 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1229 CERROR("Unable to initialize checksum hash %s\n",
1230 cfs_crypto_hash_name(cfs_alg));
1231 return PTR_ERR(req);
1234 while (nob > 0 && pg_count > 0) {
1235 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1237 /* corrupt the data before we compute the checksum, to
1238 * simulate an OST->client data error */
1239 if (i == 0 && opc == OST_READ &&
1240 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1241 unsigned char *ptr = kmap(pga[i]->pg);
1242 int off = pga[i]->off & ~PAGE_MASK;
1244 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1247 cfs_crypto_hash_update_page(req, pga[i]->pg,
1248 pga[i]->off & ~PAGE_MASK,
1250 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1251 (int)(pga[i]->off & ~PAGE_MASK));
1253 nob -= pga[i]->count;
1258 bufsize = sizeof(*cksum);
1259 cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1261 /* For sending we only compute the wrong checksum instead
1262 * of corrupting the data so it is still correct on a redo */
1263 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1269 static int osc_checksum_bulk_rw(const char *obd_name,
1270 enum cksum_types cksum_type,
1271 int nob, size_t pg_count,
1272 struct brw_page **pga, int opc,
1275 obd_dif_csum_fn *fn = NULL;
1276 int sector_size = 0;
1280 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
1283 rc = osc_checksum_bulk_t10pi(obd_name, nob, pg_count, pga,
1284 opc, fn, sector_size, check_sum);
1286 rc = osc_checksum_bulk(nob, pg_count, pga, opc, cksum_type,
1293 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1294 u32 page_count, struct brw_page **pga,
1295 struct ptlrpc_request **reqp, int resend)
1297 struct ptlrpc_request *req;
1298 struct ptlrpc_bulk_desc *desc;
1299 struct ost_body *body;
1300 struct obd_ioobj *ioobj;
1301 struct niobuf_remote *niobuf;
1302 int niocount, i, requested_nob, opc, rc, short_io_size = 0;
1303 struct osc_brw_async_args *aa;
1304 struct req_capsule *pill;
1305 struct brw_page *pg_prev;
1307 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1310 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1311 RETURN(-ENOMEM); /* Recoverable */
1312 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1313 RETURN(-EINVAL); /* Fatal */
1315 if ((cmd & OBD_BRW_WRITE) != 0) {
1317 req = ptlrpc_request_alloc_pool(cli->cl_import,
1319 &RQF_OST_BRW_WRITE);
1322 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1327 for (niocount = i = 1; i < page_count; i++) {
1328 if (!can_merge_pages(pga[i - 1], pga[i]))
1332 pill = &req->rq_pill;
1333 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1335 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1336 niocount * sizeof(*niobuf));
1338 for (i = 0; i < page_count; i++)
1339 short_io_size += pga[i]->count;
1341 /* Check if read/write is small enough to be a short io. */
1342 if (short_io_size > cli->cl_max_short_io_bytes || niocount > 1 ||
1343 !imp_connect_shortio(cli->cl_import))
1346 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1347 opc == OST_READ ? 0 : short_io_size);
1348 if (opc == OST_READ)
1349 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1352 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1354 ptlrpc_request_free(req);
1357 osc_set_io_portal(req);
1359 ptlrpc_at_set_req_timeout(req);
1360 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1362 req->rq_no_retry_einprogress = 1;
1364 if (short_io_size != 0) {
1366 short_io_buf = NULL;
1370 desc = ptlrpc_prep_bulk_imp(req, page_count,
1371 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1372 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1373 PTLRPC_BULK_PUT_SINK) |
1374 PTLRPC_BULK_BUF_KIOV,
1376 &ptlrpc_bulk_kiov_pin_ops);
1379 GOTO(out, rc = -ENOMEM);
1380 /* NB request now owns desc and will free it when it gets freed */
1382 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1383 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1384 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1385 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1387 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1389 /* For READ and WRITE, we can't fill o_uid and o_gid using from_kuid()
1390 * and from_kgid(), because they are asynchronous. Fortunately, variable
1391 * oa contains valid o_uid and o_gid in these two operations.
1392 * Besides, filling o_uid and o_gid is enough for nrs-tbf, see LU-9658.
1393 * OBD_MD_FLUID and OBD_MD_FLUID is not set in order to avoid breaking
1394 * other process logic */
1395 body->oa.o_uid = oa->o_uid;
1396 body->oa.o_gid = oa->o_gid;
1398 obdo_to_ioobj(oa, ioobj);
1399 ioobj->ioo_bufcnt = niocount;
1400 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1401 * that might be send for this request. The actual number is decided
1402 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1403 * "max - 1" for old client compatibility sending "0", and also so the
1404 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1406 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1408 ioobj_max_brw_set(ioobj, 0);
1410 if (short_io_size != 0) {
1411 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1412 body->oa.o_valid |= OBD_MD_FLFLAGS;
1413 body->oa.o_flags = 0;
1415 body->oa.o_flags |= OBD_FL_SHORT_IO;
1416 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1418 if (opc == OST_WRITE) {
1419 short_io_buf = req_capsule_client_get(pill,
1421 LASSERT(short_io_buf != NULL);
1425 LASSERT(page_count > 0);
1427 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1428 struct brw_page *pg = pga[i];
1429 int poff = pg->off & ~PAGE_MASK;
1431 LASSERT(pg->count > 0);
1432 /* make sure there is no gap in the middle of page array */
1433 LASSERTF(page_count == 1 ||
1434 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1435 ergo(i > 0 && i < page_count - 1,
1436 poff == 0 && pg->count == PAGE_SIZE) &&
1437 ergo(i == page_count - 1, poff == 0)),
1438 "i: %d/%d pg: %p off: %llu, count: %u\n",
1439 i, page_count, pg, pg->off, pg->count);
1440 LASSERTF(i == 0 || pg->off > pg_prev->off,
1441 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1442 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1444 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1445 pg_prev->pg, page_private(pg_prev->pg),
1446 pg_prev->pg->index, pg_prev->off);
1447 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1448 (pg->flag & OBD_BRW_SRVLOCK));
1449 if (short_io_size != 0 && opc == OST_WRITE) {
1450 unsigned char *ptr = ll_kmap_atomic(pg->pg, KM_USER0);
1452 LASSERT(short_io_size >= requested_nob + pg->count);
1453 memcpy(short_io_buf + requested_nob,
1456 ll_kunmap_atomic(ptr, KM_USER0);
1457 } else if (short_io_size == 0) {
1458 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1461 requested_nob += pg->count;
1463 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1465 niobuf->rnb_len += pg->count;
1467 niobuf->rnb_offset = pg->off;
1468 niobuf->rnb_len = pg->count;
1469 niobuf->rnb_flags = pg->flag;
1474 LASSERTF((void *)(niobuf - niocount) ==
1475 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1476 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1477 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1479 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1481 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1482 body->oa.o_valid |= OBD_MD_FLFLAGS;
1483 body->oa.o_flags = 0;
1485 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1488 if (osc_should_shrink_grant(cli))
1489 osc_shrink_grant_local(cli, &body->oa);
1491 /* size[REQ_REC_OFF] still sizeof (*body) */
1492 if (opc == OST_WRITE) {
1493 if (cli->cl_checksum &&
1494 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1495 /* store cl_cksum_type in a local variable since
1496 * it can be changed via lprocfs */
1497 enum cksum_types cksum_type = cli->cl_cksum_type;
1499 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1500 body->oa.o_flags = 0;
1502 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1504 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1506 rc = osc_checksum_bulk_rw(obd_name, cksum_type,
1507 requested_nob, page_count,
1511 CDEBUG(D_PAGE, "failed to checksum, rc = %d\n",
1515 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1518 /* save this in 'oa', too, for later checking */
1519 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1520 oa->o_flags |= obd_cksum_type_pack(obd_name,
1523 /* clear out the checksum flag, in case this is a
1524 * resend but cl_checksum is no longer set. b=11238 */
1525 oa->o_valid &= ~OBD_MD_FLCKSUM;
1527 oa->o_cksum = body->oa.o_cksum;
1528 /* 1 RC per niobuf */
1529 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1530 sizeof(__u32) * niocount);
1532 if (cli->cl_checksum &&
1533 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1534 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1535 body->oa.o_flags = 0;
1536 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1537 cli->cl_cksum_type);
1538 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1541 /* Client cksum has been already copied to wire obdo in previous
1542 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1543 * resent due to cksum error, this will allow Server to
1544 * check+dump pages on its side */
1546 ptlrpc_request_set_replen(req);
1548 aa = ptlrpc_req_async_args(aa, req);
1550 aa->aa_requested_nob = requested_nob;
1551 aa->aa_nio_count = niocount;
1552 aa->aa_page_count = page_count;
1556 INIT_LIST_HEAD(&aa->aa_oaps);
1559 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1560 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1561 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1562 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1566 ptlrpc_req_finished(req);
1570 char dbgcksum_file_name[PATH_MAX];
1572 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1573 struct brw_page **pga, __u32 server_cksum,
1581 /* will only keep dump of pages on first error for the same range in
1582 * file/fid, not during the resends/retries. */
1583 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1584 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1585 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1586 libcfs_debug_file_path_arr :
1587 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1588 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1589 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1590 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1592 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1593 client_cksum, server_cksum);
1594 filp = filp_open(dbgcksum_file_name,
1595 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1599 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1600 "checksum error: rc = %d\n", dbgcksum_file_name,
1603 CERROR("%s: can't open to dump pages with checksum "
1604 "error: rc = %d\n", dbgcksum_file_name, rc);
1608 for (i = 0; i < page_count; i++) {
1609 len = pga[i]->count;
1610 buf = kmap(pga[i]->pg);
1612 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1614 CERROR("%s: wanted to write %u but got %d "
1615 "error\n", dbgcksum_file_name, len, rc);
1620 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1621 dbgcksum_file_name, rc);
1626 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1628 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1629 filp_close(filp, NULL);
1634 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1635 __u32 client_cksum, __u32 server_cksum,
1636 struct osc_brw_async_args *aa)
1638 const char *obd_name = aa->aa_cli->cl_import->imp_obd->obd_name;
1639 enum cksum_types cksum_type;
1640 obd_dif_csum_fn *fn = NULL;
1641 int sector_size = 0;
1646 if (server_cksum == client_cksum) {
1647 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1651 if (aa->aa_cli->cl_checksum_dump)
1652 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1653 server_cksum, client_cksum);
1655 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1658 switch (cksum_type) {
1659 case OBD_CKSUM_T10IP512:
1663 case OBD_CKSUM_T10IP4K:
1667 case OBD_CKSUM_T10CRC512:
1668 fn = obd_dif_crc_fn;
1671 case OBD_CKSUM_T10CRC4K:
1672 fn = obd_dif_crc_fn;
1680 rc = osc_checksum_bulk_t10pi(obd_name, aa->aa_requested_nob,
1681 aa->aa_page_count, aa->aa_ppga,
1682 OST_WRITE, fn, sector_size,
1685 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1686 aa->aa_ppga, OST_WRITE, cksum_type,
1690 msg = "failed to calculate the client write checksum";
1691 else if (cksum_type != obd_cksum_type_unpack(aa->aa_oa->o_flags))
1692 msg = "the server did not use the checksum type specified in "
1693 "the original request - likely a protocol problem";
1694 else if (new_cksum == server_cksum)
1695 msg = "changed on the client after we checksummed it - "
1696 "likely false positive due to mmap IO (bug 11742)";
1697 else if (new_cksum == client_cksum)
1698 msg = "changed in transit before arrival at OST";
1700 msg = "changed in transit AND doesn't match the original - "
1701 "likely false positive due to mmap IO (bug 11742)";
1703 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1704 DFID " object "DOSTID" extent [%llu-%llu], original "
1705 "client csum %x (type %x), server csum %x (type %x),"
1706 " client csum now %x\n",
1707 obd_name, msg, libcfs_nid2str(peer->nid),
1708 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1709 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1710 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1711 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1712 aa->aa_ppga[aa->aa_page_count - 1]->off +
1713 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1715 obd_cksum_type_unpack(aa->aa_oa->o_flags),
1716 server_cksum, cksum_type, new_cksum);
1720 /* Note rc enters this function as number of bytes transferred */
1721 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1723 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1724 struct client_obd *cli = aa->aa_cli;
1725 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1726 const struct lnet_process_id *peer =
1727 &req->rq_import->imp_connection->c_peer;
1728 struct ost_body *body;
1729 u32 client_cksum = 0;
1733 if (rc < 0 && rc != -EDQUOT) {
1734 DEBUG_REQ(D_INFO, req, "Failed request: rc = %d", rc);
1738 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1739 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1741 DEBUG_REQ(D_INFO, req, "cannot unpack body");
1745 /* set/clear over quota flag for a uid/gid/projid */
1746 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1747 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1748 unsigned qid[LL_MAXQUOTAS] = {
1749 body->oa.o_uid, body->oa.o_gid,
1750 body->oa.o_projid };
1752 "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1753 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1754 body->oa.o_valid, body->oa.o_flags);
1755 osc_quota_setdq(cli, req->rq_xid, qid, body->oa.o_valid,
1759 osc_update_grant(cli, body);
1764 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1765 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1767 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1769 CERROR("%s: unexpected positive size %d\n",
1774 if (req->rq_bulk != NULL &&
1775 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1778 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1779 check_write_checksum(&body->oa, peer, client_cksum,
1780 body->oa.o_cksum, aa))
1783 rc = check_write_rcs(req, aa->aa_requested_nob,
1784 aa->aa_nio_count, aa->aa_page_count,
1789 /* The rest of this function executes only for OST_READs */
1791 if (req->rq_bulk == NULL) {
1792 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1794 LASSERT(rc == req->rq_status);
1796 /* if unwrap_bulk failed, return -EAGAIN to retry */
1797 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1800 GOTO(out, rc = -EAGAIN);
1802 if (rc > aa->aa_requested_nob) {
1803 CERROR("%s: unexpected size %d, requested %d\n", obd_name,
1804 rc, aa->aa_requested_nob);
1808 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1809 CERROR("%s: unexpected size %d, transferred %d\n", obd_name,
1810 rc, req->rq_bulk->bd_nob_transferred);
1814 if (req->rq_bulk == NULL) {
1816 int nob, pg_count, i = 0;
1819 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1820 pg_count = aa->aa_page_count;
1821 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1824 while (nob > 0 && pg_count > 0) {
1826 int count = aa->aa_ppga[i]->count > nob ?
1827 nob : aa->aa_ppga[i]->count;
1829 CDEBUG(D_CACHE, "page %p count %d\n",
1830 aa->aa_ppga[i]->pg, count);
1831 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1832 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1834 ll_kunmap_atomic((void *) ptr, KM_USER0);
1843 if (rc < aa->aa_requested_nob)
1844 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1846 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1847 static int cksum_counter;
1848 u32 server_cksum = body->oa.o_cksum;
1851 enum cksum_types cksum_type;
1852 u32 o_flags = body->oa.o_valid & OBD_MD_FLFLAGS ?
1853 body->oa.o_flags : 0;
1855 cksum_type = obd_cksum_type_unpack(o_flags);
1856 rc = osc_checksum_bulk_rw(obd_name, cksum_type, rc,
1857 aa->aa_page_count, aa->aa_ppga,
1858 OST_READ, &client_cksum);
1862 if (req->rq_bulk != NULL &&
1863 peer->nid != req->rq_bulk->bd_sender) {
1865 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1868 if (server_cksum != client_cksum) {
1869 struct ost_body *clbody;
1870 u32 page_count = aa->aa_page_count;
1872 clbody = req_capsule_client_get(&req->rq_pill,
1874 if (cli->cl_checksum_dump)
1875 dump_all_bulk_pages(&clbody->oa, page_count,
1876 aa->aa_ppga, server_cksum,
1879 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1880 "%s%s%s inode "DFID" object "DOSTID
1881 " extent [%llu-%llu], client %x, "
1882 "server %x, cksum_type %x\n",
1884 libcfs_nid2str(peer->nid),
1886 clbody->oa.o_valid & OBD_MD_FLFID ?
1887 clbody->oa.o_parent_seq : 0ULL,
1888 clbody->oa.o_valid & OBD_MD_FLFID ?
1889 clbody->oa.o_parent_oid : 0,
1890 clbody->oa.o_valid & OBD_MD_FLFID ?
1891 clbody->oa.o_parent_ver : 0,
1892 POSTID(&body->oa.o_oi),
1893 aa->aa_ppga[0]->off,
1894 aa->aa_ppga[page_count-1]->off +
1895 aa->aa_ppga[page_count-1]->count - 1,
1896 client_cksum, server_cksum,
1899 aa->aa_oa->o_cksum = client_cksum;
1903 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1906 } else if (unlikely(client_cksum)) {
1907 static int cksum_missed;
1910 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1911 CERROR("%s: checksum %u requested from %s but not sent\n",
1912 obd_name, cksum_missed,
1913 libcfs_nid2str(peer->nid));
1919 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1920 aa->aa_oa, &body->oa);
1925 static int osc_brw_redo_request(struct ptlrpc_request *request,
1926 struct osc_brw_async_args *aa, int rc)
1928 struct ptlrpc_request *new_req;
1929 struct osc_brw_async_args *new_aa;
1930 struct osc_async_page *oap;
1933 /* The below message is checked in replay-ost-single.sh test_8ae*/
1934 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1935 "redo for recoverable error %d", rc);
1937 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1938 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1939 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1940 aa->aa_ppga, &new_req, 1);
1944 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1945 if (oap->oap_request != NULL) {
1946 LASSERTF(request == oap->oap_request,
1947 "request %p != oap_request %p\n",
1948 request, oap->oap_request);
1949 if (oap->oap_interrupted) {
1950 ptlrpc_req_finished(new_req);
1956 * New request takes over pga and oaps from old request.
1957 * Note that copying a list_head doesn't work, need to move it...
1960 new_req->rq_interpret_reply = request->rq_interpret_reply;
1961 new_req->rq_async_args = request->rq_async_args;
1962 new_req->rq_commit_cb = request->rq_commit_cb;
1963 /* cap resend delay to the current request timeout, this is similar to
1964 * what ptlrpc does (see after_reply()) */
1965 if (aa->aa_resends > new_req->rq_timeout)
1966 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1968 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1969 new_req->rq_generation_set = 1;
1970 new_req->rq_import_generation = request->rq_import_generation;
1972 new_aa = ptlrpc_req_async_args(new_aa, new_req);
1974 INIT_LIST_HEAD(&new_aa->aa_oaps);
1975 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1976 INIT_LIST_HEAD(&new_aa->aa_exts);
1977 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1978 new_aa->aa_resends = aa->aa_resends;
1980 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1981 if (oap->oap_request) {
1982 ptlrpc_req_finished(oap->oap_request);
1983 oap->oap_request = ptlrpc_request_addref(new_req);
1987 /* XXX: This code will run into problem if we're going to support
1988 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1989 * and wait for all of them to be finished. We should inherit request
1990 * set from old request. */
1991 ptlrpcd_add_req(new_req);
1993 DEBUG_REQ(D_INFO, new_req, "new request");
1998 * ugh, we want disk allocation on the target to happen in offset order. we'll
1999 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
2000 * fine for our small page arrays and doesn't require allocation. its an
2001 * insertion sort that swaps elements that are strides apart, shrinking the
2002 * stride down until its '1' and the array is sorted.
2004 static void sort_brw_pages(struct brw_page **array, int num)
2007 struct brw_page *tmp;
2011 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
2016 for (i = stride ; i < num ; i++) {
2019 while (j >= stride && array[j - stride]->off > tmp->off) {
2020 array[j] = array[j - stride];
2025 } while (stride > 1);
2028 static void osc_release_ppga(struct brw_page **ppga, size_t count)
2030 LASSERT(ppga != NULL);
2031 OBD_FREE(ppga, sizeof(*ppga) * count);
2034 static int brw_interpret(const struct lu_env *env,
2035 struct ptlrpc_request *req, void *args, int rc)
2037 struct osc_brw_async_args *aa = args;
2038 struct osc_extent *ext;
2039 struct osc_extent *tmp;
2040 struct client_obd *cli = aa->aa_cli;
2041 unsigned long transferred = 0;
2045 rc = osc_brw_fini_request(req, rc);
2046 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2048 * When server returns -EINPROGRESS, client should always retry
2049 * regardless of the number of times the bulk was resent already.
2051 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
2052 if (req->rq_import_generation !=
2053 req->rq_import->imp_generation) {
2054 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2055 ""DOSTID", rc = %d.\n",
2056 req->rq_import->imp_obd->obd_name,
2057 POSTID(&aa->aa_oa->o_oi), rc);
2058 } else if (rc == -EINPROGRESS ||
2059 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2060 rc = osc_brw_redo_request(req, aa, rc);
2062 CERROR("%s: too many resent retries for object: "
2063 "%llu:%llu, rc = %d.\n",
2064 req->rq_import->imp_obd->obd_name,
2065 POSTID(&aa->aa_oa->o_oi), rc);
2070 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2075 struct obdo *oa = aa->aa_oa;
2076 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
2077 unsigned long valid = 0;
2078 struct cl_object *obj;
2079 struct osc_async_page *last;
2081 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
2082 obj = osc2cl(last->oap_obj);
2084 cl_object_attr_lock(obj);
2085 if (oa->o_valid & OBD_MD_FLBLOCKS) {
2086 attr->cat_blocks = oa->o_blocks;
2087 valid |= CAT_BLOCKS;
2089 if (oa->o_valid & OBD_MD_FLMTIME) {
2090 attr->cat_mtime = oa->o_mtime;
2093 if (oa->o_valid & OBD_MD_FLATIME) {
2094 attr->cat_atime = oa->o_atime;
2097 if (oa->o_valid & OBD_MD_FLCTIME) {
2098 attr->cat_ctime = oa->o_ctime;
2102 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2103 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
2104 loff_t last_off = last->oap_count + last->oap_obj_off +
2107 /* Change file size if this is an out of quota or
2108 * direct IO write and it extends the file size */
2109 if (loi->loi_lvb.lvb_size < last_off) {
2110 attr->cat_size = last_off;
2113 /* Extend KMS if it's not a lockless write */
2114 if (loi->loi_kms < last_off &&
2115 oap2osc_page(last)->ops_srvlock == 0) {
2116 attr->cat_kms = last_off;
2122 cl_object_attr_update(env, obj, attr, valid);
2123 cl_object_attr_unlock(obj);
2125 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
2127 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
2128 osc_inc_unstable_pages(req);
2130 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
2131 list_del_init(&ext->oe_link);
2132 osc_extent_finish(env, ext, 1,
2133 rc && req->rq_no_delay ? -EWOULDBLOCK : rc);
2135 LASSERT(list_empty(&aa->aa_exts));
2136 LASSERT(list_empty(&aa->aa_oaps));
2138 transferred = (req->rq_bulk == NULL ? /* short io */
2139 aa->aa_requested_nob :
2140 req->rq_bulk->bd_nob_transferred);
2142 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2143 ptlrpc_lprocfs_brw(req, transferred);
2145 spin_lock(&cli->cl_loi_list_lock);
2146 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2147 * is called so we know whether to go to sync BRWs or wait for more
2148 * RPCs to complete */
2149 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2150 cli->cl_w_in_flight--;
2152 cli->cl_r_in_flight--;
2153 osc_wake_cache_waiters(cli);
2154 spin_unlock(&cli->cl_loi_list_lock);
2156 osc_io_unplug(env, cli, NULL);
2160 static void brw_commit(struct ptlrpc_request *req)
2162 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
2163 * this called via the rq_commit_cb, I need to ensure
2164 * osc_dec_unstable_pages is still called. Otherwise unstable
2165 * pages may be leaked. */
2166 spin_lock(&req->rq_lock);
2167 if (likely(req->rq_unstable)) {
2168 req->rq_unstable = 0;
2169 spin_unlock(&req->rq_lock);
2171 osc_dec_unstable_pages(req);
2173 req->rq_committed = 1;
2174 spin_unlock(&req->rq_lock);
2179 * Build an RPC by the list of extent @ext_list. The caller must ensure
2180 * that the total pages in this list are NOT over max pages per RPC.
2181 * Extents in the list must be in OES_RPC state.
2183 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
2184 struct list_head *ext_list, int cmd)
2186 struct ptlrpc_request *req = NULL;
2187 struct osc_extent *ext;
2188 struct brw_page **pga = NULL;
2189 struct osc_brw_async_args *aa = NULL;
2190 struct obdo *oa = NULL;
2191 struct osc_async_page *oap;
2192 struct osc_object *obj = NULL;
2193 struct cl_req_attr *crattr = NULL;
2194 loff_t starting_offset = OBD_OBJECT_EOF;
2195 loff_t ending_offset = 0;
2199 bool soft_sync = false;
2200 bool interrupted = false;
2201 bool ndelay = false;
2205 __u32 layout_version = 0;
2206 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
2207 struct ost_body *body;
2209 LASSERT(!list_empty(ext_list));
2211 /* add pages into rpc_list to build BRW rpc */
2212 list_for_each_entry(ext, ext_list, oe_link) {
2213 LASSERT(ext->oe_state == OES_RPC);
2214 mem_tight |= ext->oe_memalloc;
2215 grant += ext->oe_grants;
2216 page_count += ext->oe_nr_pages;
2217 layout_version = MAX(layout_version, ext->oe_layout_version);
2222 soft_sync = osc_over_unstable_soft_limit(cli);
2224 mpflag = cfs_memory_pressure_get_and_set();
2226 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2228 GOTO(out, rc = -ENOMEM);
2230 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2232 GOTO(out, rc = -ENOMEM);
2235 list_for_each_entry(ext, ext_list, oe_link) {
2236 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
2238 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2240 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
2241 pga[i] = &oap->oap_brw_page;
2242 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2245 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2246 if (starting_offset == OBD_OBJECT_EOF ||
2247 starting_offset > oap->oap_obj_off)
2248 starting_offset = oap->oap_obj_off;
2250 LASSERT(oap->oap_page_off == 0);
2251 if (ending_offset < oap->oap_obj_off + oap->oap_count)
2252 ending_offset = oap->oap_obj_off +
2255 LASSERT(oap->oap_page_off + oap->oap_count ==
2257 if (oap->oap_interrupted)
2264 /* first page in the list */
2265 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
2267 crattr = &osc_env_info(env)->oti_req_attr;
2268 memset(crattr, 0, sizeof(*crattr));
2269 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2270 crattr->cra_flags = ~0ULL;
2271 crattr->cra_page = oap2cl_page(oap);
2272 crattr->cra_oa = oa;
2273 cl_req_attr_set(env, osc2cl(obj), crattr);
2275 if (cmd == OBD_BRW_WRITE) {
2276 oa->o_grant_used = grant;
2277 if (layout_version > 0) {
2278 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2279 PFID(&oa->o_oi.oi_fid), layout_version);
2281 oa->o_layout_version = layout_version;
2282 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2286 sort_brw_pages(pga, page_count);
2287 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2289 CERROR("prep_req failed: %d\n", rc);
2293 req->rq_commit_cb = brw_commit;
2294 req->rq_interpret_reply = brw_interpret;
2295 req->rq_memalloc = mem_tight != 0;
2296 oap->oap_request = ptlrpc_request_addref(req);
2297 if (interrupted && !req->rq_intr)
2298 ptlrpc_mark_interrupted(req);
2300 req->rq_no_resend = req->rq_no_delay = 1;
2301 /* probably set a shorter timeout value.
2302 * to handle ETIMEDOUT in brw_interpret() correctly. */
2303 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2306 /* Need to update the timestamps after the request is built in case
2307 * we race with setattr (locally or in queue at OST). If OST gets
2308 * later setattr before earlier BRW (as determined by the request xid),
2309 * the OST will not use BRW timestamps. Sadly, there is no obvious
2310 * way to do this in a single call. bug 10150 */
2311 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2312 crattr->cra_oa = &body->oa;
2313 crattr->cra_flags = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2314 cl_req_attr_set(env, osc2cl(obj), crattr);
2315 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2317 aa = ptlrpc_req_async_args(aa, req);
2318 INIT_LIST_HEAD(&aa->aa_oaps);
2319 list_splice_init(&rpc_list, &aa->aa_oaps);
2320 INIT_LIST_HEAD(&aa->aa_exts);
2321 list_splice_init(ext_list, &aa->aa_exts);
2323 spin_lock(&cli->cl_loi_list_lock);
2324 starting_offset >>= PAGE_SHIFT;
2325 if (cmd == OBD_BRW_READ) {
2326 cli->cl_r_in_flight++;
2327 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2328 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2329 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2330 starting_offset + 1);
2332 cli->cl_w_in_flight++;
2333 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2334 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2335 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2336 starting_offset + 1);
2338 spin_unlock(&cli->cl_loi_list_lock);
2340 DEBUG_REQ(D_INODE, req, "%d pages, aa %p, now %ur/%uw in flight",
2341 page_count, aa, cli->cl_r_in_flight,
2342 cli->cl_w_in_flight);
2343 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2345 ptlrpcd_add_req(req);
2351 cfs_memory_pressure_restore(mpflag);
2354 LASSERT(req == NULL);
2357 OBD_SLAB_FREE_PTR(oa, osc_obdo_kmem);
2359 OBD_FREE(pga, sizeof(*pga) * page_count);
2360 /* this should happen rarely and is pretty bad, it makes the
2361 * pending list not follow the dirty order */
2362 while (!list_empty(ext_list)) {
2363 ext = list_entry(ext_list->next, struct osc_extent,
2365 list_del_init(&ext->oe_link);
2366 osc_extent_finish(env, ext, 0, rc);
2372 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2376 LASSERT(lock != NULL);
2378 lock_res_and_lock(lock);
2380 if (lock->l_ast_data == NULL)
2381 lock->l_ast_data = data;
2382 if (lock->l_ast_data == data)
2385 unlock_res_and_lock(lock);
2390 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2391 void *cookie, struct lustre_handle *lockh,
2392 enum ldlm_mode mode, __u64 *flags, bool speculative,
2395 bool intent = *flags & LDLM_FL_HAS_INTENT;
2399 /* The request was created before ldlm_cli_enqueue call. */
2400 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2401 struct ldlm_reply *rep;
2403 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2404 LASSERT(rep != NULL);
2406 rep->lock_policy_res1 =
2407 ptlrpc_status_ntoh(rep->lock_policy_res1);
2408 if (rep->lock_policy_res1)
2409 errcode = rep->lock_policy_res1;
2411 *flags |= LDLM_FL_LVB_READY;
2412 } else if (errcode == ELDLM_OK) {
2413 *flags |= LDLM_FL_LVB_READY;
2416 /* Call the update callback. */
2417 rc = (*upcall)(cookie, lockh, errcode);
2419 /* release the reference taken in ldlm_cli_enqueue() */
2420 if (errcode == ELDLM_LOCK_MATCHED)
2422 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2423 ldlm_lock_decref(lockh, mode);
2428 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2431 struct osc_enqueue_args *aa = args;
2432 struct ldlm_lock *lock;
2433 struct lustre_handle *lockh = &aa->oa_lockh;
2434 enum ldlm_mode mode = aa->oa_mode;
2435 struct ost_lvb *lvb = aa->oa_lvb;
2436 __u32 lvb_len = sizeof(*lvb);
2441 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2443 lock = ldlm_handle2lock(lockh);
2444 LASSERTF(lock != NULL,
2445 "lockh %#llx, req %p, aa %p - client evicted?\n",
2446 lockh->cookie, req, aa);
2448 /* Take an additional reference so that a blocking AST that
2449 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2450 * to arrive after an upcall has been executed by
2451 * osc_enqueue_fini(). */
2452 ldlm_lock_addref(lockh, mode);
2454 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2455 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2457 /* Let CP AST to grant the lock first. */
2458 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2460 if (aa->oa_speculative) {
2461 LASSERT(aa->oa_lvb == NULL);
2462 LASSERT(aa->oa_flags == NULL);
2463 aa->oa_flags = &flags;
2466 /* Complete obtaining the lock procedure. */
2467 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2468 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2470 /* Complete osc stuff. */
2471 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2472 aa->oa_flags, aa->oa_speculative, rc);
2474 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2476 ldlm_lock_decref(lockh, mode);
2477 LDLM_LOCK_PUT(lock);
2481 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2483 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2484 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2485 * other synchronous requests, however keeping some locks and trying to obtain
2486 * others may take a considerable amount of time in a case of ost failure; and
2487 * when other sync requests do not get released lock from a client, the client
2488 * is evicted from the cluster -- such scenarious make the life difficult, so
2489 * release locks just after they are obtained. */
2490 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2491 __u64 *flags, union ldlm_policy_data *policy,
2492 struct ost_lvb *lvb, int kms_valid,
2493 osc_enqueue_upcall_f upcall, void *cookie,
2494 struct ldlm_enqueue_info *einfo,
2495 struct ptlrpc_request_set *rqset, int async,
2498 struct obd_device *obd = exp->exp_obd;
2499 struct lustre_handle lockh = { 0 };
2500 struct ptlrpc_request *req = NULL;
2501 int intent = *flags & LDLM_FL_HAS_INTENT;
2502 __u64 match_flags = *flags;
2503 enum ldlm_mode mode;
2507 /* Filesystem lock extents are extended to page boundaries so that
2508 * dealing with the page cache is a little smoother. */
2509 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2510 policy->l_extent.end |= ~PAGE_MASK;
2513 * kms is not valid when either object is completely fresh (so that no
2514 * locks are cached), or object was evicted. In the latter case cached
2515 * lock cannot be used, because it would prime inode state with
2516 * potentially stale LVB.
2521 /* Next, search for already existing extent locks that will cover us */
2522 /* If we're trying to read, we also search for an existing PW lock. The
2523 * VFS and page cache already protect us locally, so lots of readers/
2524 * writers can share a single PW lock.
2526 * There are problems with conversion deadlocks, so instead of
2527 * converting a read lock to a write lock, we'll just enqueue a new
2530 * At some point we should cancel the read lock instead of making them
2531 * send us a blocking callback, but there are problems with canceling
2532 * locks out from other users right now, too. */
2533 mode = einfo->ei_mode;
2534 if (einfo->ei_mode == LCK_PR)
2536 /* Normal lock requests must wait for the LVB to be ready before
2537 * matching a lock; speculative lock requests do not need to,
2538 * because they will not actually use the lock. */
2540 match_flags |= LDLM_FL_LVB_READY;
2542 match_flags |= LDLM_FL_BLOCK_GRANTED;
2543 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2544 einfo->ei_type, policy, mode, &lockh, 0);
2546 struct ldlm_lock *matched;
2548 if (*flags & LDLM_FL_TEST_LOCK)
2551 matched = ldlm_handle2lock(&lockh);
2553 /* This DLM lock request is speculative, and does not
2554 * have an associated IO request. Therefore if there
2555 * is already a DLM lock, it wll just inform the
2556 * caller to cancel the request for this stripe.*/
2557 lock_res_and_lock(matched);
2558 if (ldlm_extent_equal(&policy->l_extent,
2559 &matched->l_policy_data.l_extent))
2563 unlock_res_and_lock(matched);
2565 ldlm_lock_decref(&lockh, mode);
2566 LDLM_LOCK_PUT(matched);
2568 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2569 *flags |= LDLM_FL_LVB_READY;
2571 /* We already have a lock, and it's referenced. */
2572 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2574 ldlm_lock_decref(&lockh, mode);
2575 LDLM_LOCK_PUT(matched);
2578 ldlm_lock_decref(&lockh, mode);
2579 LDLM_LOCK_PUT(matched);
2584 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2588 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2589 &RQF_LDLM_ENQUEUE_LVB);
2593 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2595 ptlrpc_request_free(req);
2599 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2601 ptlrpc_request_set_replen(req);
2604 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2605 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2607 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2608 sizeof(*lvb), LVB_T_OST, &lockh, async);
2611 struct osc_enqueue_args *aa;
2612 aa = ptlrpc_req_async_args(aa, req);
2614 aa->oa_mode = einfo->ei_mode;
2615 aa->oa_type = einfo->ei_type;
2616 lustre_handle_copy(&aa->oa_lockh, &lockh);
2617 aa->oa_upcall = upcall;
2618 aa->oa_cookie = cookie;
2619 aa->oa_speculative = speculative;
2621 aa->oa_flags = flags;
2624 /* speculative locks are essentially to enqueue
2625 * a DLM lock in advance, so we don't care
2626 * about the result of the enqueue. */
2628 aa->oa_flags = NULL;
2631 req->rq_interpret_reply = osc_enqueue_interpret;
2632 if (rqset == PTLRPCD_SET)
2633 ptlrpcd_add_req(req);
2635 ptlrpc_set_add_req(rqset, req);
2636 } else if (intent) {
2637 ptlrpc_req_finished(req);
2642 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2643 flags, speculative, rc);
2645 ptlrpc_req_finished(req);
2650 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2651 enum ldlm_type type, union ldlm_policy_data *policy,
2652 enum ldlm_mode mode, __u64 *flags, void *data,
2653 struct lustre_handle *lockh, int unref)
2655 struct obd_device *obd = exp->exp_obd;
2656 __u64 lflags = *flags;
2660 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2663 /* Filesystem lock extents are extended to page boundaries so that
2664 * dealing with the page cache is a little smoother */
2665 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2666 policy->l_extent.end |= ~PAGE_MASK;
2668 /* Next, search for already existing extent locks that will cover us */
2669 /* If we're trying to read, we also search for an existing PW lock. The
2670 * VFS and page cache already protect us locally, so lots of readers/
2671 * writers can share a single PW lock. */
2675 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2676 res_id, type, policy, rc, lockh, unref);
2677 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2681 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2683 LASSERT(lock != NULL);
2684 if (!osc_set_lock_data(lock, data)) {
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);