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;
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_max_pages)) {
649 CERROR("dirty %lu > dirty_max %lu\n",
651 cli->cl_dirty_max_pages);
653 } else if (unlikely(atomic_long_read(&obd_dirty_pages) >
654 (long)(obd_max_dirty_pages + 1))) {
655 /* The atomic_read() allowing the atomic_inc() are
656 * not covered by a lock thus they may safely race and trip
657 * this CERROR() unless we add in a small fudge factor (+1). */
658 CERROR("%s: dirty %ld > system dirty_max %ld\n",
659 cli_name(cli), atomic_long_read(&obd_dirty_pages),
660 obd_max_dirty_pages);
662 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
664 CERROR("dirty %lu - dirty_max %lu too big???\n",
665 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
668 unsigned long nrpages;
669 unsigned long undirty;
671 nrpages = cli->cl_max_pages_per_rpc;
672 nrpages *= cli->cl_max_rpcs_in_flight + 1;
673 nrpages = max(nrpages, cli->cl_dirty_max_pages);
674 undirty = nrpages << PAGE_SHIFT;
675 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data,
679 /* take extent tax into account when asking for more
681 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
682 cli->cl_max_extent_pages;
683 undirty += nrextents * cli->cl_grant_extent_tax;
685 /* Do not ask for more than OBD_MAX_GRANT - a margin for server
686 * to add extent tax, etc.
688 oa->o_undirty = min(undirty, OBD_MAX_GRANT &
689 ~(PTLRPC_MAX_BRW_SIZE * 4UL));
691 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
692 oa->o_dropped = cli->cl_lost_grant;
693 cli->cl_lost_grant = 0;
694 spin_unlock(&cli->cl_loi_list_lock);
695 CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
696 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
699 void osc_update_next_shrink(struct client_obd *cli)
701 cli->cl_next_shrink_grant = ktime_get_seconds() +
702 cli->cl_grant_shrink_interval;
704 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
705 cli->cl_next_shrink_grant);
708 static void __osc_update_grant(struct client_obd *cli, u64 grant)
710 spin_lock(&cli->cl_loi_list_lock);
711 cli->cl_avail_grant += grant;
712 spin_unlock(&cli->cl_loi_list_lock);
715 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
717 if (body->oa.o_valid & OBD_MD_FLGRANT) {
718 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
719 __osc_update_grant(cli, body->oa.o_grant);
724 * grant thread data for shrinking space.
726 struct grant_thread_data {
727 struct list_head gtd_clients;
728 struct mutex gtd_mutex;
729 unsigned long gtd_stopped:1;
731 static struct grant_thread_data client_gtd;
733 static int osc_shrink_grant_interpret(const struct lu_env *env,
734 struct ptlrpc_request *req,
737 struct osc_grant_args *aa = args;
738 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
739 struct ost_body *body;
742 __osc_update_grant(cli, aa->aa_oa->o_grant);
746 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
748 osc_update_grant(cli, body);
750 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
756 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
758 spin_lock(&cli->cl_loi_list_lock);
759 oa->o_grant = cli->cl_avail_grant / 4;
760 cli->cl_avail_grant -= oa->o_grant;
761 spin_unlock(&cli->cl_loi_list_lock);
762 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
763 oa->o_valid |= OBD_MD_FLFLAGS;
766 oa->o_flags |= OBD_FL_SHRINK_GRANT;
767 osc_update_next_shrink(cli);
770 /* Shrink the current grant, either from some large amount to enough for a
771 * full set of in-flight RPCs, or if we have already shrunk to that limit
772 * then to enough for a single RPC. This avoids keeping more grant than
773 * needed, and avoids shrinking the grant piecemeal. */
774 static int osc_shrink_grant(struct client_obd *cli)
776 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
777 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
779 spin_lock(&cli->cl_loi_list_lock);
780 if (cli->cl_avail_grant <= target_bytes)
781 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
782 spin_unlock(&cli->cl_loi_list_lock);
784 return osc_shrink_grant_to_target(cli, target_bytes);
787 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
790 struct ost_body *body;
793 spin_lock(&cli->cl_loi_list_lock);
794 /* Don't shrink if we are already above or below the desired limit
795 * We don't want to shrink below a single RPC, as that will negatively
796 * impact block allocation and long-term performance. */
797 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
798 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
800 if (target_bytes >= cli->cl_avail_grant) {
801 spin_unlock(&cli->cl_loi_list_lock);
804 spin_unlock(&cli->cl_loi_list_lock);
810 osc_announce_cached(cli, &body->oa, 0);
812 spin_lock(&cli->cl_loi_list_lock);
813 if (target_bytes >= cli->cl_avail_grant) {
814 /* available grant has changed since target calculation */
815 spin_unlock(&cli->cl_loi_list_lock);
816 GOTO(out_free, rc = 0);
818 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
819 cli->cl_avail_grant = target_bytes;
820 spin_unlock(&cli->cl_loi_list_lock);
821 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
822 body->oa.o_valid |= OBD_MD_FLFLAGS;
823 body->oa.o_flags = 0;
825 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
826 osc_update_next_shrink(cli);
828 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
829 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
830 sizeof(*body), body, NULL);
832 __osc_update_grant(cli, body->oa.o_grant);
838 static int osc_should_shrink_grant(struct client_obd *client)
840 time64_t next_shrink = client->cl_next_shrink_grant;
842 if (client->cl_import == NULL)
845 if (!OCD_HAS_FLAG(&client->cl_import->imp_connect_data, GRANT_SHRINK) ||
846 client->cl_import->imp_grant_shrink_disabled) {
847 osc_update_next_shrink(client);
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);
1633 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1634 __u32 client_cksum, __u32 server_cksum,
1635 struct osc_brw_async_args *aa)
1637 const char *obd_name = aa->aa_cli->cl_import->imp_obd->obd_name;
1638 enum cksum_types cksum_type;
1639 obd_dif_csum_fn *fn = NULL;
1640 int sector_size = 0;
1645 if (server_cksum == client_cksum) {
1646 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1650 if (aa->aa_cli->cl_checksum_dump)
1651 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1652 server_cksum, client_cksum);
1654 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1657 switch (cksum_type) {
1658 case OBD_CKSUM_T10IP512:
1662 case OBD_CKSUM_T10IP4K:
1666 case OBD_CKSUM_T10CRC512:
1667 fn = obd_dif_crc_fn;
1670 case OBD_CKSUM_T10CRC4K:
1671 fn = obd_dif_crc_fn;
1679 rc = osc_checksum_bulk_t10pi(obd_name, aa->aa_requested_nob,
1680 aa->aa_page_count, aa->aa_ppga,
1681 OST_WRITE, fn, sector_size,
1684 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1685 aa->aa_ppga, OST_WRITE, cksum_type,
1689 msg = "failed to calculate the client write checksum";
1690 else if (cksum_type != obd_cksum_type_unpack(aa->aa_oa->o_flags))
1691 msg = "the server did not use the checksum type specified in "
1692 "the original request - likely a protocol problem";
1693 else if (new_cksum == server_cksum)
1694 msg = "changed on the client after we checksummed it - "
1695 "likely false positive due to mmap IO (bug 11742)";
1696 else if (new_cksum == client_cksum)
1697 msg = "changed in transit before arrival at OST";
1699 msg = "changed in transit AND doesn't match the original - "
1700 "likely false positive due to mmap IO (bug 11742)";
1702 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1703 DFID " object "DOSTID" extent [%llu-%llu], original "
1704 "client csum %x (type %x), server csum %x (type %x),"
1705 " client csum now %x\n",
1706 obd_name, msg, libcfs_nid2str(peer->nid),
1707 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1708 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1709 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1710 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1711 aa->aa_ppga[aa->aa_page_count - 1]->off +
1712 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1714 obd_cksum_type_unpack(aa->aa_oa->o_flags),
1715 server_cksum, cksum_type, new_cksum);
1719 /* Note rc enters this function as number of bytes transferred */
1720 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1722 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1723 struct client_obd *cli = aa->aa_cli;
1724 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1725 const struct lnet_process_id *peer =
1726 &req->rq_import->imp_connection->c_peer;
1727 struct ost_body *body;
1728 u32 client_cksum = 0;
1732 if (rc < 0 && rc != -EDQUOT) {
1733 DEBUG_REQ(D_INFO, req, "Failed request: rc = %d", rc);
1737 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1738 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1740 DEBUG_REQ(D_INFO, req, "cannot unpack body");
1744 /* set/clear over quota flag for a uid/gid/projid */
1745 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1746 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1747 unsigned qid[LL_MAXQUOTAS] = {
1748 body->oa.o_uid, body->oa.o_gid,
1749 body->oa.o_projid };
1751 "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1752 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1753 body->oa.o_valid, body->oa.o_flags);
1754 osc_quota_setdq(cli, req->rq_xid, qid, body->oa.o_valid,
1758 osc_update_grant(cli, body);
1763 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1764 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1766 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1768 CERROR("%s: unexpected positive size %d\n",
1773 if (req->rq_bulk != NULL &&
1774 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1777 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1778 check_write_checksum(&body->oa, peer, client_cksum,
1779 body->oa.o_cksum, aa))
1782 rc = check_write_rcs(req, aa->aa_requested_nob,
1783 aa->aa_nio_count, aa->aa_page_count,
1788 /* The rest of this function executes only for OST_READs */
1790 if (req->rq_bulk == NULL) {
1791 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1793 LASSERT(rc == req->rq_status);
1795 /* if unwrap_bulk failed, return -EAGAIN to retry */
1796 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1799 GOTO(out, rc = -EAGAIN);
1801 if (rc > aa->aa_requested_nob) {
1802 CERROR("%s: unexpected size %d, requested %d\n", obd_name,
1803 rc, aa->aa_requested_nob);
1807 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1808 CERROR("%s: unexpected size %d, transferred %d\n", obd_name,
1809 rc, req->rq_bulk->bd_nob_transferred);
1813 if (req->rq_bulk == NULL) {
1815 int nob, pg_count, i = 0;
1818 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1819 pg_count = aa->aa_page_count;
1820 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1823 while (nob > 0 && pg_count > 0) {
1825 int count = aa->aa_ppga[i]->count > nob ?
1826 nob : aa->aa_ppga[i]->count;
1828 CDEBUG(D_CACHE, "page %p count %d\n",
1829 aa->aa_ppga[i]->pg, count);
1830 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1831 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1833 ll_kunmap_atomic((void *) ptr, KM_USER0);
1842 if (rc < aa->aa_requested_nob)
1843 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1845 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1846 static int cksum_counter;
1847 u32 server_cksum = body->oa.o_cksum;
1850 enum cksum_types cksum_type;
1851 u32 o_flags = body->oa.o_valid & OBD_MD_FLFLAGS ?
1852 body->oa.o_flags : 0;
1854 cksum_type = obd_cksum_type_unpack(o_flags);
1855 rc = osc_checksum_bulk_rw(obd_name, cksum_type, rc,
1856 aa->aa_page_count, aa->aa_ppga,
1857 OST_READ, &client_cksum);
1861 if (req->rq_bulk != NULL &&
1862 peer->nid != req->rq_bulk->bd_sender) {
1864 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1867 if (server_cksum != client_cksum) {
1868 struct ost_body *clbody;
1869 u32 page_count = aa->aa_page_count;
1871 clbody = req_capsule_client_get(&req->rq_pill,
1873 if (cli->cl_checksum_dump)
1874 dump_all_bulk_pages(&clbody->oa, page_count,
1875 aa->aa_ppga, server_cksum,
1878 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1879 "%s%s%s inode "DFID" object "DOSTID
1880 " extent [%llu-%llu], client %x, "
1881 "server %x, cksum_type %x\n",
1883 libcfs_nid2str(peer->nid),
1885 clbody->oa.o_valid & OBD_MD_FLFID ?
1886 clbody->oa.o_parent_seq : 0ULL,
1887 clbody->oa.o_valid & OBD_MD_FLFID ?
1888 clbody->oa.o_parent_oid : 0,
1889 clbody->oa.o_valid & OBD_MD_FLFID ?
1890 clbody->oa.o_parent_ver : 0,
1891 POSTID(&body->oa.o_oi),
1892 aa->aa_ppga[0]->off,
1893 aa->aa_ppga[page_count-1]->off +
1894 aa->aa_ppga[page_count-1]->count - 1,
1895 client_cksum, server_cksum,
1898 aa->aa_oa->o_cksum = client_cksum;
1902 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1905 } else if (unlikely(client_cksum)) {
1906 static int cksum_missed;
1909 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1910 CERROR("%s: checksum %u requested from %s but not sent\n",
1911 obd_name, cksum_missed,
1912 libcfs_nid2str(peer->nid));
1918 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1919 aa->aa_oa, &body->oa);
1924 static int osc_brw_redo_request(struct ptlrpc_request *request,
1925 struct osc_brw_async_args *aa, int rc)
1927 struct ptlrpc_request *new_req;
1928 struct osc_brw_async_args *new_aa;
1929 struct osc_async_page *oap;
1932 /* The below message is checked in replay-ost-single.sh test_8ae*/
1933 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1934 "redo for recoverable error %d", rc);
1936 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1937 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1938 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1939 aa->aa_ppga, &new_req, 1);
1943 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1944 if (oap->oap_request != NULL) {
1945 LASSERTF(request == oap->oap_request,
1946 "request %p != oap_request %p\n",
1947 request, oap->oap_request);
1948 if (oap->oap_interrupted) {
1949 ptlrpc_req_finished(new_req);
1955 * New request takes over pga and oaps from old request.
1956 * Note that copying a list_head doesn't work, need to move it...
1959 new_req->rq_interpret_reply = request->rq_interpret_reply;
1960 new_req->rq_async_args = request->rq_async_args;
1961 new_req->rq_commit_cb = request->rq_commit_cb;
1962 /* cap resend delay to the current request timeout, this is similar to
1963 * what ptlrpc does (see after_reply()) */
1964 if (aa->aa_resends > new_req->rq_timeout)
1965 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1967 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1968 new_req->rq_generation_set = 1;
1969 new_req->rq_import_generation = request->rq_import_generation;
1971 new_aa = ptlrpc_req_async_args(new_aa, new_req);
1973 INIT_LIST_HEAD(&new_aa->aa_oaps);
1974 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1975 INIT_LIST_HEAD(&new_aa->aa_exts);
1976 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1977 new_aa->aa_resends = aa->aa_resends;
1979 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1980 if (oap->oap_request) {
1981 ptlrpc_req_finished(oap->oap_request);
1982 oap->oap_request = ptlrpc_request_addref(new_req);
1986 /* XXX: This code will run into problem if we're going to support
1987 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1988 * and wait for all of them to be finished. We should inherit request
1989 * set from old request. */
1990 ptlrpcd_add_req(new_req);
1992 DEBUG_REQ(D_INFO, new_req, "new request");
1997 * ugh, we want disk allocation on the target to happen in offset order. we'll
1998 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1999 * fine for our small page arrays and doesn't require allocation. its an
2000 * insertion sort that swaps elements that are strides apart, shrinking the
2001 * stride down until its '1' and the array is sorted.
2003 static void sort_brw_pages(struct brw_page **array, int num)
2006 struct brw_page *tmp;
2010 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
2015 for (i = stride ; i < num ; i++) {
2018 while (j >= stride && array[j - stride]->off > tmp->off) {
2019 array[j] = array[j - stride];
2024 } while (stride > 1);
2027 static void osc_release_ppga(struct brw_page **ppga, size_t count)
2029 LASSERT(ppga != NULL);
2030 OBD_FREE(ppga, sizeof(*ppga) * count);
2033 static int brw_interpret(const struct lu_env *env,
2034 struct ptlrpc_request *req, void *args, int rc)
2036 struct osc_brw_async_args *aa = args;
2037 struct osc_extent *ext;
2038 struct osc_extent *tmp;
2039 struct client_obd *cli = aa->aa_cli;
2040 unsigned long transferred = 0;
2044 rc = osc_brw_fini_request(req, rc);
2045 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2047 * When server returns -EINPROGRESS, client should always retry
2048 * regardless of the number of times the bulk was resent already.
2050 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
2051 if (req->rq_import_generation !=
2052 req->rq_import->imp_generation) {
2053 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2054 ""DOSTID", rc = %d.\n",
2055 req->rq_import->imp_obd->obd_name,
2056 POSTID(&aa->aa_oa->o_oi), rc);
2057 } else if (rc == -EINPROGRESS ||
2058 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2059 rc = osc_brw_redo_request(req, aa, rc);
2061 CERROR("%s: too many resent retries for object: "
2062 "%llu:%llu, rc = %d.\n",
2063 req->rq_import->imp_obd->obd_name,
2064 POSTID(&aa->aa_oa->o_oi), rc);
2069 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2074 struct obdo *oa = aa->aa_oa;
2075 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
2076 unsigned long valid = 0;
2077 struct cl_object *obj;
2078 struct osc_async_page *last;
2080 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
2081 obj = osc2cl(last->oap_obj);
2083 cl_object_attr_lock(obj);
2084 if (oa->o_valid & OBD_MD_FLBLOCKS) {
2085 attr->cat_blocks = oa->o_blocks;
2086 valid |= CAT_BLOCKS;
2088 if (oa->o_valid & OBD_MD_FLMTIME) {
2089 attr->cat_mtime = oa->o_mtime;
2092 if (oa->o_valid & OBD_MD_FLATIME) {
2093 attr->cat_atime = oa->o_atime;
2096 if (oa->o_valid & OBD_MD_FLCTIME) {
2097 attr->cat_ctime = oa->o_ctime;
2101 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2102 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
2103 loff_t last_off = last->oap_count + last->oap_obj_off +
2106 /* Change file size if this is an out of quota or
2107 * direct IO write and it extends the file size */
2108 if (loi->loi_lvb.lvb_size < last_off) {
2109 attr->cat_size = last_off;
2112 /* Extend KMS if it's not a lockless write */
2113 if (loi->loi_kms < last_off &&
2114 oap2osc_page(last)->ops_srvlock == 0) {
2115 attr->cat_kms = last_off;
2121 cl_object_attr_update(env, obj, attr, valid);
2122 cl_object_attr_unlock(obj);
2124 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 LIST_HEAD(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, osc_enqueue_upcall_f upcall,
2493 void *cookie, struct ldlm_enqueue_info *einfo,
2494 struct ptlrpc_request_set *rqset, int async,
2497 struct obd_device *obd = exp->exp_obd;
2498 struct lustre_handle lockh = { 0 };
2499 struct ptlrpc_request *req = NULL;
2500 int intent = *flags & LDLM_FL_HAS_INTENT;
2501 __u64 match_flags = *flags;
2502 enum ldlm_mode mode;
2506 /* Filesystem lock extents are extended to page boundaries so that
2507 * dealing with the page cache is a little smoother. */
2508 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2509 policy->l_extent.end |= ~PAGE_MASK;
2511 /* Next, search for already existing extent locks that will cover us */
2512 /* If we're trying to read, we also search for an existing PW lock. The
2513 * VFS and page cache already protect us locally, so lots of readers/
2514 * writers can share a single PW lock.
2516 * There are problems with conversion deadlocks, so instead of
2517 * converting a read lock to a write lock, we'll just enqueue a new
2520 * At some point we should cancel the read lock instead of making them
2521 * send us a blocking callback, but there are problems with canceling
2522 * locks out from other users right now, too. */
2523 mode = einfo->ei_mode;
2524 if (einfo->ei_mode == LCK_PR)
2526 /* Normal lock requests must wait for the LVB to be ready before
2527 * matching a lock; speculative lock requests do not need to,
2528 * because they will not actually use the lock. */
2530 match_flags |= LDLM_FL_LVB_READY;
2532 match_flags |= LDLM_FL_BLOCK_GRANTED;
2533 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2534 einfo->ei_type, policy, mode, &lockh, 0);
2536 struct ldlm_lock *matched;
2538 if (*flags & LDLM_FL_TEST_LOCK)
2541 matched = ldlm_handle2lock(&lockh);
2543 /* This DLM lock request is speculative, and does not
2544 * have an associated IO request. Therefore if there
2545 * is already a DLM lock, it wll just inform the
2546 * caller to cancel the request for this stripe.*/
2547 lock_res_and_lock(matched);
2548 if (ldlm_extent_equal(&policy->l_extent,
2549 &matched->l_policy_data.l_extent))
2553 unlock_res_and_lock(matched);
2555 ldlm_lock_decref(&lockh, mode);
2556 LDLM_LOCK_PUT(matched);
2558 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2559 *flags |= LDLM_FL_LVB_READY;
2561 /* We already have a lock, and it's referenced. */
2562 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2564 ldlm_lock_decref(&lockh, mode);
2565 LDLM_LOCK_PUT(matched);
2568 ldlm_lock_decref(&lockh, mode);
2569 LDLM_LOCK_PUT(matched);
2573 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2577 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2578 &RQF_LDLM_ENQUEUE_LVB);
2582 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2584 ptlrpc_request_free(req);
2588 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2590 ptlrpc_request_set_replen(req);
2593 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2594 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2596 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2597 sizeof(*lvb), LVB_T_OST, &lockh, async);
2600 struct osc_enqueue_args *aa;
2601 aa = ptlrpc_req_async_args(aa, req);
2603 aa->oa_mode = einfo->ei_mode;
2604 aa->oa_type = einfo->ei_type;
2605 lustre_handle_copy(&aa->oa_lockh, &lockh);
2606 aa->oa_upcall = upcall;
2607 aa->oa_cookie = cookie;
2608 aa->oa_speculative = speculative;
2610 aa->oa_flags = flags;
2613 /* speculative locks are essentially to enqueue
2614 * a DLM lock in advance, so we don't care
2615 * about the result of the enqueue. */
2617 aa->oa_flags = NULL;
2620 req->rq_interpret_reply = osc_enqueue_interpret;
2621 if (rqset == PTLRPCD_SET)
2622 ptlrpcd_add_req(req);
2624 ptlrpc_set_add_req(rqset, req);
2625 } else if (intent) {
2626 ptlrpc_req_finished(req);
2631 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2632 flags, speculative, rc);
2634 ptlrpc_req_finished(req);
2639 int osc_match_base(const struct lu_env *env, struct obd_export *exp,
2640 struct ldlm_res_id *res_id, enum ldlm_type type,
2641 union ldlm_policy_data *policy, enum ldlm_mode mode,
2642 __u64 *flags, struct osc_object *obj,
2643 struct lustre_handle *lockh, int unref)
2645 struct obd_device *obd = exp->exp_obd;
2646 __u64 lflags = *flags;
2650 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2653 /* Filesystem lock extents are extended to page boundaries so that
2654 * dealing with the page cache is a little smoother */
2655 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2656 policy->l_extent.end |= ~PAGE_MASK;
2658 /* Next, search for already existing extent locks that will cover us */
2659 /* If we're trying to read, we also search for an existing PW lock. The
2660 * VFS and page cache already protect us locally, so lots of readers/
2661 * writers can share a single PW lock. */
2665 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2666 res_id, type, policy, rc, lockh, unref);
2667 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2671 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2673 LASSERT(lock != NULL);
2674 if (osc_set_lock_data(lock, obj)) {
2675 lock_res_and_lock(lock);
2676 if (!ldlm_is_lvb_cached(lock)) {
2677 LASSERT(lock->l_ast_data == obj);
2678 osc_lock_lvb_update(env, obj, lock, NULL);
2679 ldlm_set_lvb_cached(lock);
2681 unlock_res_and_lock(lock);
2683 ldlm_lock_decref(lockh, rc);
2686 LDLM_LOCK_PUT(lock);
2691 static int osc_statfs_interpret(const struct lu_env *env,
2692 struct ptlrpc_request *req, void *args, int rc)
2694 struct osc_async_args *aa = args;
2695 struct obd_statfs *msfs;
2700 * The request has in fact never been sent due to issues at
2701 * a higher level (LOV). Exit immediately since the caller
2702 * is aware of the problem and takes care of the clean up.
2706 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2707 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2713 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2715 GOTO(out, rc = -EPROTO);
2717 *aa->aa_oi->oi_osfs = *msfs;
2719 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2724 static int osc_statfs_async(struct obd_export *exp,
2725 struct obd_info *oinfo, time64_t max_age,
2726 struct ptlrpc_request_set *rqset)
2728 struct obd_device *obd = class_exp2obd(exp);
2729 struct ptlrpc_request *req;
2730 struct osc_async_args *aa;
2734 if (obd->obd_osfs_age >= max_age) {
2736 "%s: use %p cache blocks %llu/%llu objects %llu/%llu\n",
2737 obd->obd_name, &obd->obd_osfs,
2738 obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
2739 obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
2740 spin_lock(&obd->obd_osfs_lock);
2741 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
2742 spin_unlock(&obd->obd_osfs_lock);
2743 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
2744 if (oinfo->oi_cb_up)
2745 oinfo->oi_cb_up(oinfo, 0);
2750 /* We could possibly pass max_age in the request (as an absolute
2751 * timestamp or a "seconds.usec ago") so the target can avoid doing
2752 * extra calls into the filesystem if that isn't necessary (e.g.
2753 * during mount that would help a bit). Having relative timestamps
2754 * is not so great if request processing is slow, while absolute
2755 * timestamps are not ideal because they need time synchronization. */
2756 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2760 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2762 ptlrpc_request_free(req);
2765 ptlrpc_request_set_replen(req);
2766 req->rq_request_portal = OST_CREATE_PORTAL;
2767 ptlrpc_at_set_req_timeout(req);
2769 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2770 /* procfs requests not want stat in wait for avoid deadlock */
2771 req->rq_no_resend = 1;
2772 req->rq_no_delay = 1;
2775 req->rq_interpret_reply = osc_statfs_interpret;
2776 aa = ptlrpc_req_async_args(aa, req);
2779 ptlrpc_set_add_req(rqset, req);
2783 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2784 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
2786 struct obd_device *obd = class_exp2obd(exp);
2787 struct obd_statfs *msfs;
2788 struct ptlrpc_request *req;
2789 struct obd_import *imp = NULL;
2794 /*Since the request might also come from lprocfs, so we need
2795 *sync this with client_disconnect_export Bug15684*/
2796 down_read(&obd->u.cli.cl_sem);
2797 if (obd->u.cli.cl_import)
2798 imp = class_import_get(obd->u.cli.cl_import);
2799 up_read(&obd->u.cli.cl_sem);
2803 /* We could possibly pass max_age in the request (as an absolute
2804 * timestamp or a "seconds.usec ago") so the target can avoid doing
2805 * extra calls into the filesystem if that isn't necessary (e.g.
2806 * during mount that would help a bit). Having relative timestamps
2807 * is not so great if request processing is slow, while absolute
2808 * timestamps are not ideal because they need time synchronization. */
2809 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2811 class_import_put(imp);
2816 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2818 ptlrpc_request_free(req);
2821 ptlrpc_request_set_replen(req);
2822 req->rq_request_portal = OST_CREATE_PORTAL;
2823 ptlrpc_at_set_req_timeout(req);
2825 if (flags & OBD_STATFS_NODELAY) {
2826 /* procfs requests not want stat in wait for avoid deadlock */
2827 req->rq_no_resend = 1;
2828 req->rq_no_delay = 1;
2831 rc = ptlrpc_queue_wait(req);
2835 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2837 GOTO(out, rc = -EPROTO);
2843 ptlrpc_req_finished(req);
2847 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2848 void *karg, void __user *uarg)
2850 struct obd_device *obd = exp->exp_obd;
2851 struct obd_ioctl_data *data = karg;
2855 if (!try_module_get(THIS_MODULE)) {
2856 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2857 module_name(THIS_MODULE));
2861 case OBD_IOC_CLIENT_RECOVER:
2862 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
2863 data->ioc_inlbuf1, 0);
2867 case IOC_OSC_SET_ACTIVE:
2868 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
2873 CDEBUG(D_INODE, "%s: unrecognised ioctl %#x by %s: rc = %d\n",
2874 obd->obd_name, cmd, current_comm(), rc);
2878 module_put(THIS_MODULE);
2882 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2883 u32 keylen, void *key, u32 vallen, void *val,
2884 struct ptlrpc_request_set *set)
2886 struct ptlrpc_request *req;
2887 struct obd_device *obd = exp->exp_obd;
2888 struct obd_import *imp = class_exp2cliimp(exp);
2893 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2895 if (KEY_IS(KEY_CHECKSUM)) {
2896 if (vallen != sizeof(int))
2898 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2902 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2903 sptlrpc_conf_client_adapt(obd);
2907 if (KEY_IS(KEY_FLUSH_CTX)) {
2908 sptlrpc_import_flush_my_ctx(imp);
2912 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2913 struct client_obd *cli = &obd->u.cli;
2914 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2915 long target = *(long *)val;
2917 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2922 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2925 /* We pass all other commands directly to OST. Since nobody calls osc
2926 methods directly and everybody is supposed to go through LOV, we
2927 assume lov checked invalid values for us.
2928 The only recognised values so far are evict_by_nid and mds_conn.
2929 Even if something bad goes through, we'd get a -EINVAL from OST
2932 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2933 &RQF_OST_SET_GRANT_INFO :
2938 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2939 RCL_CLIENT, keylen);
2940 if (!KEY_IS(KEY_GRANT_SHRINK))
2941 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2942 RCL_CLIENT, vallen);
2943 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2945 ptlrpc_request_free(req);
2949 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2950 memcpy(tmp, key, keylen);
2951 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2954 memcpy(tmp, val, vallen);
2956 if (KEY_IS(KEY_GRANT_SHRINK)) {
2957 struct osc_grant_args *aa;
2960 aa = ptlrpc_req_async_args(aa, req);
2961 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2963 ptlrpc_req_finished(req);
2966 *oa = ((struct ost_body *)val)->oa;
2968 req->rq_interpret_reply = osc_shrink_grant_interpret;
2971 ptlrpc_request_set_replen(req);
2972 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2973 LASSERT(set != NULL);
2974 ptlrpc_set_add_req(set, req);
2975 ptlrpc_check_set(NULL, set);
2977 ptlrpcd_add_req(req);
2982 EXPORT_SYMBOL(osc_set_info_async);
2984 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
2985 struct obd_device *obd, struct obd_uuid *cluuid,
2986 struct obd_connect_data *data, void *localdata)
2988 struct client_obd *cli = &obd->u.cli;
2990 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2994 spin_lock(&cli->cl_loi_list_lock);
2995 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2996 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM) {
2997 /* restore ocd_grant_blkbits as client page bits */
2998 data->ocd_grant_blkbits = PAGE_SHIFT;
2999 grant += cli->cl_dirty_grant;
3001 grant += cli->cl_dirty_pages << PAGE_SHIFT;
3003 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
3004 lost_grant = cli->cl_lost_grant;
3005 cli->cl_lost_grant = 0;
3006 spin_unlock(&cli->cl_loi_list_lock);
3008 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
3009 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
3010 data->ocd_version, data->ocd_grant, lost_grant);
3015 EXPORT_SYMBOL(osc_reconnect);
3017 int osc_disconnect(struct obd_export *exp)
3019 struct obd_device *obd = class_exp2obd(exp);
3022 rc = client_disconnect_export(exp);
3024 * Initially we put del_shrink_grant before disconnect_export, but it
3025 * causes the following problem if setup (connect) and cleanup
3026 * (disconnect) are tangled together.
3027 * connect p1 disconnect p2
3028 * ptlrpc_connect_import
3029 * ............... class_manual_cleanup
3032 * ptlrpc_connect_interrupt
3034 * add this client to shrink list
3036 * Bang! grant shrink thread trigger the shrink. BUG18662
3038 osc_del_grant_list(&obd->u.cli);
3041 EXPORT_SYMBOL(osc_disconnect);
3043 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
3044 struct hlist_node *hnode, void *arg)
3046 struct lu_env *env = arg;
3047 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
3048 struct ldlm_lock *lock;
3049 struct osc_object *osc = NULL;
3053 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
3054 if (lock->l_ast_data != NULL && osc == NULL) {
3055 osc = lock->l_ast_data;
3056 cl_object_get(osc2cl(osc));
3059 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
3060 * by the 2nd round of ldlm_namespace_clean() call in
3061 * osc_import_event(). */
3062 ldlm_clear_cleaned(lock);
3067 osc_object_invalidate(env, osc);
3068 cl_object_put(env, osc2cl(osc));
3073 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
3075 static int osc_import_event(struct obd_device *obd,
3076 struct obd_import *imp,
3077 enum obd_import_event event)
3079 struct client_obd *cli;
3083 LASSERT(imp->imp_obd == obd);
3086 case IMP_EVENT_DISCON: {
3088 spin_lock(&cli->cl_loi_list_lock);
3089 cli->cl_avail_grant = 0;
3090 cli->cl_lost_grant = 0;
3091 spin_unlock(&cli->cl_loi_list_lock);
3094 case IMP_EVENT_INACTIVE: {
3095 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
3098 case IMP_EVENT_INVALIDATE: {
3099 struct ldlm_namespace *ns = obd->obd_namespace;
3103 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3105 env = cl_env_get(&refcheck);
3107 osc_io_unplug(env, &obd->u.cli, NULL);
3109 cfs_hash_for_each_nolock(ns->ns_rs_hash,
3110 osc_ldlm_resource_invalidate,
3112 cl_env_put(env, &refcheck);
3114 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3119 case IMP_EVENT_ACTIVE: {
3120 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
3123 case IMP_EVENT_OCD: {
3124 struct obd_connect_data *ocd = &imp->imp_connect_data;
3126 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3127 osc_init_grant(&obd->u.cli, ocd);
3130 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3131 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3133 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
3136 case IMP_EVENT_DEACTIVATE: {
3137 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
3140 case IMP_EVENT_ACTIVATE: {
3141 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
3145 CERROR("Unknown import event %d\n", event);
3152 * Determine whether the lock can be canceled before replaying the lock
3153 * during recovery, see bug16774 for detailed information.
3155 * \retval zero the lock can't be canceled
3156 * \retval other ok to cancel
3158 static int osc_cancel_weight(struct ldlm_lock *lock)
3161 * Cancel all unused and granted extent lock.
3163 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3164 ldlm_is_granted(lock) &&
3165 osc_ldlm_weigh_ast(lock) == 0)
3171 static int brw_queue_work(const struct lu_env *env, void *data)
3173 struct client_obd *cli = data;
3175 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3177 osc_io_unplug(env, cli, NULL);
3181 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
3183 struct client_obd *cli = &obd->u.cli;
3189 rc = ptlrpcd_addref();
3193 rc = client_obd_setup(obd, lcfg);
3195 GOTO(out_ptlrpcd, rc);
3198 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3199 if (IS_ERR(handler))
3200 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3201 cli->cl_writeback_work = handler;
3203 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3204 if (IS_ERR(handler))
3205 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3206 cli->cl_lru_work = handler;
3208 rc = osc_quota_setup(obd);
3210 GOTO(out_ptlrpcd_work, rc);
3212 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3213 osc_update_next_shrink(cli);
3218 if (cli->cl_writeback_work != NULL) {
3219 ptlrpcd_destroy_work(cli->cl_writeback_work);
3220 cli->cl_writeback_work = NULL;
3222 if (cli->cl_lru_work != NULL) {
3223 ptlrpcd_destroy_work(cli->cl_lru_work);
3224 cli->cl_lru_work = NULL;
3226 client_obd_cleanup(obd);
3231 EXPORT_SYMBOL(osc_setup_common);
3233 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3235 struct client_obd *cli = &obd->u.cli;
3243 rc = osc_setup_common(obd, lcfg);
3247 rc = osc_tunables_init(obd);
3252 * We try to control the total number of requests with a upper limit
3253 * osc_reqpool_maxreqcount. There might be some race which will cause
3254 * over-limit allocation, but it is fine.
3256 req_count = atomic_read(&osc_pool_req_count);
3257 if (req_count < osc_reqpool_maxreqcount) {
3258 adding = cli->cl_max_rpcs_in_flight + 2;
3259 if (req_count + adding > osc_reqpool_maxreqcount)
3260 adding = osc_reqpool_maxreqcount - req_count;
3262 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3263 atomic_add(added, &osc_pool_req_count);
3266 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3268 spin_lock(&osc_shrink_lock);
3269 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3270 spin_unlock(&osc_shrink_lock);
3271 cli->cl_import->imp_idle_timeout = osc_idle_timeout;
3272 cli->cl_import->imp_idle_debug = D_HA;
3277 int osc_precleanup_common(struct obd_device *obd)
3279 struct client_obd *cli = &obd->u.cli;
3283 * for echo client, export may be on zombie list, wait for
3284 * zombie thread to cull it, because cli.cl_import will be
3285 * cleared in client_disconnect_export():
3286 * class_export_destroy() -> obd_cleanup() ->
3287 * echo_device_free() -> echo_client_cleanup() ->
3288 * obd_disconnect() -> osc_disconnect() ->
3289 * client_disconnect_export()
3291 obd_zombie_barrier();
3292 if (cli->cl_writeback_work) {
3293 ptlrpcd_destroy_work(cli->cl_writeback_work);
3294 cli->cl_writeback_work = NULL;
3297 if (cli->cl_lru_work) {
3298 ptlrpcd_destroy_work(cli->cl_lru_work);
3299 cli->cl_lru_work = NULL;
3302 obd_cleanup_client_import(obd);
3305 EXPORT_SYMBOL(osc_precleanup_common);
3307 static int osc_precleanup(struct obd_device *obd)
3311 osc_precleanup_common(obd);
3313 ptlrpc_lprocfs_unregister_obd(obd);
3317 int osc_cleanup_common(struct obd_device *obd)
3319 struct client_obd *cli = &obd->u.cli;
3324 spin_lock(&osc_shrink_lock);
3325 list_del(&cli->cl_shrink_list);
3326 spin_unlock(&osc_shrink_lock);
3329 if (cli->cl_cache != NULL) {
3330 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3331 spin_lock(&cli->cl_cache->ccc_lru_lock);
3332 list_del_init(&cli->cl_lru_osc);
3333 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3334 cli->cl_lru_left = NULL;
3335 cl_cache_decref(cli->cl_cache);
3336 cli->cl_cache = NULL;
3339 /* free memory of osc quota cache */
3340 osc_quota_cleanup(obd);
3342 rc = client_obd_cleanup(obd);
3347 EXPORT_SYMBOL(osc_cleanup_common);
3349 static const struct obd_ops osc_obd_ops = {
3350 .o_owner = THIS_MODULE,
3351 .o_setup = osc_setup,
3352 .o_precleanup = osc_precleanup,
3353 .o_cleanup = osc_cleanup_common,
3354 .o_add_conn = client_import_add_conn,
3355 .o_del_conn = client_import_del_conn,
3356 .o_connect = client_connect_import,
3357 .o_reconnect = osc_reconnect,
3358 .o_disconnect = osc_disconnect,
3359 .o_statfs = osc_statfs,
3360 .o_statfs_async = osc_statfs_async,
3361 .o_create = osc_create,
3362 .o_destroy = osc_destroy,
3363 .o_getattr = osc_getattr,
3364 .o_setattr = osc_setattr,
3365 .o_iocontrol = osc_iocontrol,
3366 .o_set_info_async = osc_set_info_async,
3367 .o_import_event = osc_import_event,
3368 .o_quotactl = osc_quotactl,
3371 static struct shrinker *osc_cache_shrinker;
3372 LIST_HEAD(osc_shrink_list);
3373 DEFINE_SPINLOCK(osc_shrink_lock);
3375 #ifndef HAVE_SHRINKER_COUNT
3376 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3378 struct shrink_control scv = {
3379 .nr_to_scan = shrink_param(sc, nr_to_scan),
3380 .gfp_mask = shrink_param(sc, gfp_mask)
3382 (void)osc_cache_shrink_scan(shrinker, &scv);
3384 return osc_cache_shrink_count(shrinker, &scv);
3388 static int __init osc_init(void)
3390 unsigned int reqpool_size;
3391 unsigned int reqsize;
3393 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3394 osc_cache_shrink_count, osc_cache_shrink_scan);
3397 /* print an address of _any_ initialized kernel symbol from this
3398 * module, to allow debugging with gdb that doesn't support data
3399 * symbols from modules.*/
3400 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3402 rc = lu_kmem_init(osc_caches);
3406 rc = class_register_type(&osc_obd_ops, NULL, true, NULL,
3407 LUSTRE_OSC_NAME, &osc_device_type);
3411 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3413 /* This is obviously too much memory, only prevent overflow here */
3414 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3415 GOTO(out_type, rc = -EINVAL);
3417 reqpool_size = osc_reqpool_mem_max << 20;
3420 while (reqsize < OST_IO_MAXREQSIZE)
3421 reqsize = reqsize << 1;
3424 * We don't enlarge the request count in OSC pool according to
3425 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3426 * tried after normal allocation failed. So a small OSC pool won't
3427 * cause much performance degression in most of cases.
3429 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3431 atomic_set(&osc_pool_req_count, 0);
3432 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3433 ptlrpc_add_rqs_to_pool);
3435 if (osc_rq_pool == NULL)
3436 GOTO(out_type, rc = -ENOMEM);
3438 rc = osc_start_grant_work();
3440 GOTO(out_req_pool, rc);
3445 ptlrpc_free_rq_pool(osc_rq_pool);
3447 class_unregister_type(LUSTRE_OSC_NAME);
3449 lu_kmem_fini(osc_caches);
3454 static void __exit osc_exit(void)
3456 osc_stop_grant_work();
3457 remove_shrinker(osc_cache_shrinker);
3458 class_unregister_type(LUSTRE_OSC_NAME);
3459 lu_kmem_fini(osc_caches);
3460 ptlrpc_free_rq_pool(osc_rq_pool);
3463 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3464 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3465 MODULE_VERSION(LUSTRE_VERSION_STRING);
3466 MODULE_LICENSE("GPL");
3468 module_init(osc_init);
3469 module_exit(osc_exit);